CONTINENTAL RESOURCES INC
S-4/A, 1998-10-20
CRUDE PETROLEUM & NATURAL GAS
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<PAGE>
   
    AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON OCTOBER 20, 1998
    
                                                      REGISTRATION NO. 333-61547
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                           --------------------------
 
   
                                AMENDMENT NO. 1
                                       TO
                                    FORM S-4
    
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
                            ------------------------
 
                          CONTINENTAL RESOURCES, INC.
             (Exact name of registrant as specified in its charter)
 
<TABLE>
<S>                              <C>                            <C>
           OKLAHOMA                          1311                  73-0767549
 (State or other jurisdiction    (Primary Standard Industrial   (I.R.S. Employer
              of                 Classification Code Number)     Identification
incorporation or organization)                                        No.)
</TABLE>
 
                           --------------------------
 
   
        302 NORTH INDEPENDENCE                        ROGER CLEMENT
              SUITE 300                           302 NORTH INDEPENDENCE
         ENID, OKLAHOMA 73701                           SUITE 300
            (580) 233-8955                         ENID, OKLAHOMA 73701
  (Address, including Zip Code, and                   (580) 233-8955
              telephone                       (Name, address, including Zip
   number, including area code, of             Code, and telephone number,
   registrant's principal executive         including area code, of agent for
               offices)                                  service)
 
                           --------------------------
    
 
                                   COPIES TO:
 
                             THEODORE M. ELAM, ESQ.
                              BRICE TARZWELL, ESQ.
                    MCAFEE & TAFT A PROFESSIONAL CORPORATION
                       TENTH FLOOR, TWO LEADERSHIP SQUARE
                         OKLAHOMA CITY, OKLAHOMA 73102
                                 (405) 235-9621
                           --------------------------
 
        APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:
  AS SOON AS PRACTICABLE AFTER THIS REGISTRATION STATEMENT BECOMES EFFECTIVE.
                           --------------------------
 
    If the securities being registered on this Form are being offered in
connection with the formation of a holding company and there is compliance with
General Instruction G, check the following box:  / /
 
    If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, check the following box and
list the Securities Act registration number of the earlier effective
registration statement for the same offering.  / /
 
    If this Form is a post-effective amendment filed pursuant to Rule 462(d)
under the Securities Act, check the following box and list the Securities Act
registration statement under the earlier effective registration statement for
the same offering.  / /
                           --------------------------
 
                        CALCULATION OF REGISTRATION FEE
 
<TABLE>
<CAPTION>
                                                             PROPOSED MAXIMUM    PROPOSED MAXIMUM
        TITLE OF EACH CLASS OF              AMOUNT TO         OFFERING PRICE        AGGREGATE           AMOUNT OF
     SECURITIES TO BE REGISTERED          BE REGISTERED        PER UNIT(1)      OFFERING PRICE(1)    REGISTRATION FEE
<S>                                     <C>                 <C>                 <C>                 <C>
10 1/4% Senior Subordinated Notes due
  2008................................     $150,000,000            100%            $150,000,000         $44,250(1)
</TABLE>
 
(1) Estimated solely for the purpose of computing the registration fee in
    accordance with Rule 457(f)(2).
                           --------------------------
 
    THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8 OF THE
SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8, MAY
DETERMINE.
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
                             ADDITIONAL REGISTRANTS
 
                               CONTINENTAL GAS, INC.
             (Exact name of registrant as specified in its charter)
 
<TABLE>
<S>                              <C>                            <C>
           OKLAHOMA                          1311                  73-1363922
 (State or other jurisdiction    (Primary Standard Industrial   (I.R.S. Employer
              of                 Classification Code Number)     Identification
incorporation or organization)                                      Number)
</TABLE>
 
                       302 NORTH INDEPENDENCE, SUITE 300
                              ENID, OKLAHOMA 73701
                                 (580) 233-8955
              (Address, including zip code, and telephone number,
       including area code, of registrant's principal executive offices)
 
                                 ROGER CLEMENT
                        SENIOR VICE PRESIDENT, TREASURER
                          AND CHIEF FINANCIAL OFFICER
                       302 NORTH INDEPENDENCE, SUITE 300
                              ENID, OKLAHOMA 73701
                                 (580) 233-8955
           (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)
 
                             CONTINENTAL CRUDE CO.
             (Exact name of registrant as specified in its charter)
 
<TABLE>
<S>                              <C>                            <C>
           OKLAHOMA                          1311                  73-1541220
 (State or other jurisdiction    (Primary Standard Industrial   (I.R.S. Employer
              of                 Classification Code Number)     Identification
incorporation or organization)                                      Number)
</TABLE>
 
                       302 NORTH INDEPENDENCE, SUITE 300
                              ENID, OKLAHOMA 73701
                                 (580) 233-8955
              (Address, including zip code, and telephone number,
       including area code, of registrant's principal executive offices)
 
                                 ROGER CLEMENT
                        SENIOR VICE PRESIDENT, TREASURER
                          AND CHIEF FINANCIAL OFFICER
                       302 NORTH INDEPENDENCE, SUITE 300
                              ENID, OKLAHOMA 73701
                                 (580) 233-8955
           (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)
<PAGE>
PRELIMINARY PROSPECTUS (SUBJECT TO COMPLETION)
INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A
REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE
SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT BE SOLD NOR MAY
OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION STATEMENT BECOMES
EFFECTIVE. THIS PROSPECTUS SHALL NOT CONSTITUTE AN OFFER TO SELL OR THE
SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE SECURITIES
IN ANY STATE IN WHICH SUCH OFFER, SOLICITATION OR SALE WOULD BE UNLAWFUL PRIOR
TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH STATE.
<PAGE>
   
ISSUED OCTOBER 20, 1998
    
 
                                 OFFER TO EXCHANGE
 
                                ALL OUTSTANDING
                   10 1/4% SENIOR SUBORDINATED NOTES DUE 2008
                  ($150,000,000 PRINCIPAL AMOUNT OUTSTANDING)
                                      FOR
                   10 1/4% SENIOR SUBORDINATED NOTES DUE 2008
              WHICH HAVE BEEN REGISTERED UNDER THE SECURITIES ACT
                                       OF
 
                          CONTINENTAL RESOURCES, INC.
                                ----------------
 
   
    The Exchange Offer will expire at 5:00 p.m., New York City time, on November
  , 1998, unless extended (if and as extended, the "Expiration Date"). The
Company will accept for exchange any and all validly tendered Old Notes on or
prior to 5:00 p.m., New York City time, on the Expiration Date. Tenders of Old
Notes may be withdrawn at any time prior to 5:00 p.m., New York City time, on
the Expiration Date. See "The Exchange Offer."
    
 
                           --------------------------
 
    SEE "RISK FACTORS" BEGINNING ON PAGE 15 FOR A DISCUSSION OF CERTAIN FACTORS
WHICH INVESTORS SHOULD CONSIDER IN CONNECTION WITH THE EXCHANGE OFFER AND AN
INVESTMENT IN THE NEW NOTES OFFERED HEREBY.
 
                           --------------------------
 
   
    Continental Resources, Inc., an Oklahoma corporation (the "Company" or
"Continental"), hereby offers (the "Exchange Offer"), upon the terms and subject
to the conditions set forth in this Prospectus and the accompanying Letter of
Transmittal to exchange $1,000 principal amount of its 10 1/4% Senior
Subordinated Notes Due 2008 (the "New Notes"), which have been registered under
the Securities Act of 1933, as amended (the "Securities Act"), pursuant to a
Registration Statement of which this Prospectus is a part, for each $1,000
principal amount of its outstanding 10 1/4% Senior Subordinated Notes Due 2008
(the "Old Notes"), of which an aggregate of $150,000,000 in principal amount was
outstanding as of October 16, 1998. The New Notes and the Old Notes are
collectively referred to herein as the "Notes."
    
 
                                                   (COVER CONTINUED ON PAGE II.)
 
                           --------------------------
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
  EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE
    SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION
     PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY
                 REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
 
                           --------------------------
 
   
    Interest on the New Notes will be paid in cash at a rate of 10 1/4% per
annum on each February 1 and August 1, commencing February 1, 1999. The New
Notes may be redeemed at the option of the Company, in whole or in part, at any
time on or after August 1, 2003 at 105.125% of their principal amount, plus
accrued interest, declining ratably to 100% of their principal amount, plus
accrued interest, on or after August 1, 2006. In addition, at any time prior to
August 1, 2001, the Company may redeem up to 35% of the aggregate principal
amount of the New Notes with the net proceeds of one or more sales of capital
stock of the Company, at 110.250% of their principal amount, plus accrued
interest; provided that after any such redemption at least $97.5 million
aggregate principal amount of Notes remains outstanding. See "Description of
Notes."
    
 
   
    This Prospectus, together with the Letter of Transmittal, is being sent to
all registered holders of Old Notes as of October 16, 1998. As of such date, a
nominee for The Depository Trust Company was the only registered holder of the
Old Notes.
    
 
   
    The Company will not receive any proceeds from this Exchange Offer. No
dealer-manager is being used in connection with this Exchange Offer. See "Use of
Proceeds" and "Plan of Distribution."
    
 
    WE ARE NOT ASKING YOU FOR A PROXY AND YOU ARE REQUESTED NOT TO SEND US A
PROXY.
 
                           --------------------------
 
                THE DATE OF THIS PROSPECTUS IS          , 1998.
<PAGE>
   
    The New Notes will be general unsecured obligations of the Company entitled
to the benefits of the Indenture governing the Notes (as defined herein). The
New Notes will be subordinated in right of payment to all existing and future
Senior Debt (as defined in the Indenture), including indebtedness under the
Company's revolving credit facility with Bank One, Oklahoma, N.A. (the "Credit
Facility"), will rank equally in right of payment with the Old Notes and all
other senior indebtedness of the Company, and will rank senior in right of
payment to all other subordinated indebtedness of the Company. Payment of
principal, premium, if any, and interest on the New Notes will be
unconditionally guaranteed, jointly and severally, on a senior unsecured basis,
by the Company's two wholly owned subsidiaries, Continental Gas, Inc. and
Continental Crude Co., and by its future Restricted Subsidiaries (as defined in
the Indenture) (the "Subsidiary Guarantors"). The Old Notes are, and the New
Notes will be, subordinated in right of payment to all existing and future
Senior Debt, will rank equally in right of payment to all other senior debt and
will rank senior in right of payment to all other subordinated indebtedness of
the Subsidiary Guarantors. As of June 30, 1998, the Company had, on a
consolidated basis, $3.8 million of Senior Debt (exclusive of $75.0 million of
unused commitments under the Credit Facility), all of which ranks senior to the
Notes, the Company had no senior subordinated debt outstanding (exclusive of the
Notes), and the Subsidiary Guarantors had no indebtedness outstanding other than
the guarantees of the Credit Facility and the Subsidiary Guarantees. The form
and terms of the New Notes are identical in all material respects to the form
and terms of the Old Notes except that the New Notes have been registered under
the Securities Act. Any Old Notes not tendered and accepted in the Exchange
Offer will remain outstanding and will be entitled to all the rights and
preferences and will be subject to the limitations applicable thereto under the
Indenture. Following consummation of the Exchange Offer, the holders of the Old
Notes will continue to be subject to the existing restrictions upon transfer
thereof and the Company will have no further obligation to such holders to
provide for the registration under the Securities Act of the Old Notes held by
them. Following the completion of the Exchange Offer, none of the Notes will be
entitled to the contingent increase in interest rate provided pursuant to the
Old Notes. The Exchange Offer is being made pursuant to the terms of the
registration rights agreement (the "Registration Rights Agreement") entered into
between the Company and Chase Securities Inc. (the "Initial Purchaser") pursuant
to the terms of the Purchase Agreement dated July 21, 1998 between the Company
and the Initial Purchases. See "The Exchange Offer--Purpose and Effect of the
Exchange Offer."
    
 
    Based on interpretations by the staff of the Securities and Exchange
Commission (the "Commission") set forth in no-action letters issued to third
parties, the Company believes the New Notes issued pursuant to the Exchange
Offer in exchange for Old Notes may be offered for resale, resold and otherwise
transferred by any holder thereof (other than broker-dealers, as set forth
below, and any such holder that is an "affiliate" of the Company within the
meaning of Rule 405 under the Securities Act) without compliance with the
registration and prospectus delivery provisions of the Securities Act, provided
that such New Notes are acquired in the ordinary course of such holder's
business and that such holder has no arrangement or understanding with any
person to participate in the distribution of such New Notes. Any holder who
tenders in the Exchange Offer with the intention to participate, or for the
purpose of participating, in a distribution of the New Notes or who is an
affiliate of the Company may not rely upon such interpretations by the staff of
the Commission and, in the absence of an exemption therefrom, must comply with
the registration and prospectus delivery requirements of the Securities Act in
connection with any secondary resale transaction. Holders of Old Notes wishing
to accept the Exchange offer must represent to the Company in the Letter of
Transmittal that such conditions have been met.
 
   
    Each broker-dealer (other than an affiliate of the Company) that receives
New Notes for its own account pursuant to the Exchange Offer as a result of
market making activities must acknowledge that it will deliver a prospectus
meeting the requirements of the Securities Act in connection with any resale of
such New Notes. The Letter of Transmittal states that by so acknowledging and by
delivering a prospectus, a broker-dealer will not be deemed to admit that it is
an "underwriter" within the meaning of the Securities Act. This Prospectus, as
it may be amended or supplemented from time to time, may be used by a broker-
dealer in connection with resales of New Notes received in exchange for Old
Notes where such Old Notes were acquired by such broker-dealer as a result of
market-making activities or other trading activities. The Company has agreed
that, for a period of 180 days after the last date Old Notes are accepted for
exchange pursuant to the Exchange Offer (the "Exchange Date"), it will make this
Prospectus available to any broker-dealer for use in connection with any such
resale. See "Plan of Distribution." Any broker-dealer who is an affiliate of the
Company may not rely on such no-action letters and must comply with the
registration and prospectus delivery requirements of the Securities Act in
connection with a secondary resale transaction.
    
 
                                       ii
<PAGE>
                               TABLE OF CONTENTS
 
   
<TABLE>
<CAPTION>
                                                                                                                PAGE
                                                                                                                -----
<S>                                                                                                          <C>
 
Periodic Reports...........................................................................................          iv
 
Available Information......................................................................................          iv
 
Summary....................................................................................................           1
 
Risk Factors...............................................................................................          13
 
The Exchange Offer.........................................................................................          21
 
Unaudited Pro Forma Consolidated Financial Statements......................................................          29
 
Selected Consolidated Financial Data.......................................................................          34
 
Management's Discussion and Analysis of Financial Condition and Results of Operations......................          36
 
Business and Properties....................................................................................          45
 
Management.................................................................................................          62
 
Summary Compensation Table.................................................................................          64
 
Certain Relationships and Related Transactions.............................................................          65
 
Principal Shareholders.....................................................................................          66
 
Description of Credit Facility.............................................................................          66
 
Description of Notes.......................................................................................          67
 
Certain United States Tax Consequences.....................................................................          99
 
Plan of Distribution.......................................................................................         103
 
Legal Matters..............................................................................................         104
 
Experts....................................................................................................         104
 
Glossary of Terms..........................................................................................         105
 
Index to Financial Statements..............................................................................         F-1
</TABLE>
    
 
                            ------------------------
 
    NO PERSON IS AUTHORIZED IN CONNECTION WITH THE OFFERING MADE HEREBY TO GIVE
ANY INFORMATION OR TO MAKE ANY REPRESENTATION NOT CONTAINED IN THIS PROSPECTUS
OR THE ACCOMPANYING LETTER OF TRANSMITTAL AND, IF GIVEN OR MADE, SUCH
INFORMATION OR REPRESENTATION NOT CONTAINED HEREIN MUST NOT BE RELIED UPON AS
HAVING BEEN AUTHORIZED BY THE COMPANY.
 
                            ------------------------
 
    THE EXCHANGE OFFER IS NOT BEING MADE TO, NOR WILL THE COMPANY ACCEPT
SURRENDERS FOR EXCHANGE FROM, HOLDERS OF OLD SHARES IN ANY JURISDICTION IN WHICH
THIS EXCHANGE OFFER OR THE ACCEPTANCE THEREOF WOULD NOT BE IN COMPLIANCE WITH
THE SECURITIES OR BLUE SKY LAWS OF SUCH JURISDICTION. NEITHER THE DELIVERY OF
THIS PROSPECTUS NOR THE ACCOMPANYING LETTER OF TRANSMITTAL, NOR ANY EXCHANGE
MADE HEREUNDER SHALL UNDER ANY CIRCUMSTANCES IMPLY THAT THE INFORMATION HEREIN
IS CORRECT AS OF ANY DATE SUBSEQUENT TO THE DATE HEREOF.
 
                                      iii
<PAGE>
                                PERIODIC REPORTS
 
    The Company has agreed that, whether or not required by the rules and
regulations of the Commission, so long as any Old Notes or New Notes are
outstanding, the Company will file with the Commission all such reports and
other information as it would be required to file with the Commission by Section
13(a) or 15(d) under the Securities Exchange Act of 1934 (the "Exchange Act") as
if it were subject thereto. The Company will supply the Trustee appointed with
respect to the Old Notes or New Notes and each holder of Old Notes or New Notes,
without cost, copies of such report and other information.
 
                            ------------------------
 
                             AVAILABLE INFORMATION
 
    The Company has filed with the Commission a Registration Statement on Form
S-4 (the "Registration Statement"), which term includes all amendments,
exhibits, annexes and schedules thereto) pursuant to the Securities Act, and the
rules and regulations promulgated thereunder, covering the New Notes being
offered hereby. This Prospectus does not contain all the information set forth
in the Registration Statement, certain parts of which are omitted in accordance
with the rules and regulations of the Commission. Statements made in this
Prospectus as to the contents of any contracts, agreement or other document
referred to are not necessarily complete. With respect to each such contract,
agreement or other document filed as an exhibit to the Registration Statement,
reference is made to the exhibit for a more complete description of the matter
involved, and each such statement shall be deemed qualified in its entirety by
such reference.
 
    The Company is not currently subject to the informational reporting
requirements of the Securities Exchange Act of 1934, as amended. Upon
effectiveness of a registration statement with respect to an exchange offer or a
shelf registration statement with respect to resales of the Notes (see
"Description of the Notes--Registration Rights"), the Company will become
subject to the informational requirements of the Exchange Act.
 
                            ------------------------
 
    THIS PROSPECTUS INCLUDES "FORWARD-LOOKING STATEMENTS". ALL STATEMENTS
REGARDING THE COMPANY'S AND ITS SUBSIDIARIES' EXPECTED FINANCIAL POSITION,
BUSINESS AND FINANCING PLANS ARE FORWARD-LOOKING STATEMENTS. ALTHOUGH THE
COMPANY AND ITS SUBSIDIARIES BELIEVE THAT THE EXPECTATIONS REFLECTED IN SUCH
FORWARD-LOOKING STATEMENTS ARE REASONABLE, THEY CAN GIVE NO ASSURANCE THAT SUCH
EXPECTATIONS WILL PROVE TO HAVE BEEN CORRECT. IMPORTANT FACTORS THAT COULD CAUSE
ACTUAL RESULTS TO DIFFER MATERIALLY FROM SUCH EXPECTATIONS ("CAUTIONARY
STATEMENTS") ARE DISCLOSED IN THIS PROSPECTUS, INCLUDING, WITHOUT LIMITATION, IN
CONJUNCTION WITH THE FORWARD-LOOKING STATEMENTS INCLUDED IN THIS PROSPECTUS AND
UNDER "RISK FACTORS." ALL SUBSEQUENT WRITTEN AND ORAL FORWARD-LOOKING STATEMENTS
ATTRIBUTABLE TO THE COMPANY, ITS SUBSIDIARIES OR PERSONS ACTING ON THEIR BEHALF
ARE EXPRESSLY QUALIFIED IN THEIR ENTIRETY BY THE CAUTIONARY STATEMENTS.
 
                                       iv
<PAGE>
                                    SUMMARY
 
   
    THE FOLLOWING SUMMARY IS QUALIFIED IN ITS ENTIRETY BY, AND SHOULD BE READ IN
CONJUNCTION WITH, THE MORE DETAILED INFORMATION AND FINANCIAL STATEMENTS,
INCLUDING THE NOTES THERETO, APPEARING ELSEWHERE IN THIS PROSPECTUS. UNLESS THE
CONTEXT OTHERWISE REQUIRES, ALL REFERENCES TO "CONTINENTAL" OR THE "COMPANY"
INCLUDE CONTINENTAL RESOURCES, INC. AND ITS CONSOLIDATED SUBSIDIARIES,
CONTINENTAL GAS, INC. AND CONTINENTAL CRUDE CO. PRO FORMA INFORMATION GIVES
EFFECT TO THE WORLAND FIELD ACQUISITION AND THE RELATED FINANCING, INCLUDING THE
OFFERING. THE TERM "PV-10" AND CERTAIN OTHER INDUSTRY TERMS ARE DEFINED IN THE
GLOSSARY.
    
 
                                  THE COMPANY
 
   
    Continental Resources, Inc. is engaged in the development, exploitation,
exploration and acquisition of oil and gas reserves, primarily in the Rocky
Mountains and the Mid-Continent and, to a lesser extent, in the Gulf Coast
region of Texas and Louisiana. In addition to its exploration, development and
production activities, the Company's subsidiary, Continental Gas, Inc., owns and
operates 1,000 miles of natural gas pipelines, five gas gathering systems and
three gas processing plants in its operating areas. Continental Gas, Inc. also
engages in natural gas marketing, gas pipeline construction and saltwater
disposal. Capitalizing on its growth through the drill-bit and its acquisition
strategy, on a pro forma basis the Company increased its estimated proved
reserves from 12.7 MMBoe in 1993 to 64.9 MMBoe in 1997, and increased its annual
production from 2.0 MMBoe in 1993 to 5.2 MMBoe in 1997. At December 31, 1997, on
a pro forma basis, approximately 80% of the Company's estimated proved reserves
were oil and approximately 63% of its total estimated reserves were classified
as proved developed. At June 30, 1998, the Company had interests in 1,399
producing wells of which it operated 1,114.
    
 
    The Company's Rocky Mountain activities are concentrated in the Williston
Basin of North Dakota, South Dakota and Montana and in the Big Horn Basin of
Wyoming. The Company's operations in the Williston Basin are focused on the
Cedar Hills Field which the Company believes is, potentially, one of the largest
onshore discoveries in the lower 48 states since 1971. The Cedar Hills Field
represented approximately 45% of the PV-10 attributable to the Company's
estimated proved reserves at December 31, 1997, on a pro forma basis. In the
Williston Basin, the Company owns approximately 470,000 net leasehold acres and
has interests in 322 gross (252 net) wells, has identified 105 potential
drilling locations and conducts both primary drilling and enhanced recovery
operations. The Company recently expanded its activities into the Big Horn Basin
through the acquisition of producing and non-producing properties in the Worland
Field. The Company currently owns approximately 35,000 net leasehold acres in
the Big Horn Basin and has interests in 292 gross (125 net) producing wells
which, on a pro forma basis, represented approximately 10% of the PV-10
attributable to the Company's estimated proved reserves at December 31, 1997. In
the Big Horn Basin the Company has identified 164 potential drilling locations
which represent significant opportunities.
 
   
    The Company's Mid-Continent activities are conducted primarily in the
Anadarko Basin of western Oklahoma, southwestern Kansas and the Texas Panhandle
and, to a lesser extent, in the Arkoma Basin of southeastern Oklahoma, and in
southern Illinois. At December 31, 1997 the Company's Anadarko Basin properties
represented approximately 95% of the PV-10 attributable to the Company's
estimated proved reserves in the Mid-Continent and approximately 36% of the
Company's total estimated proved reserves, on a pro forma basis. In the Anadarko
Basin the Company owns approximately 57,000 net leasehold acres, has interests
in 658 gross (408 net) producing wells and has identified 11 potential drilling
locations. The Company also owns leasehold interests and expects to expand its
exploration activities in the Arkoma Basin and Gulf Coast region of Texas and
Louisiana.
    
 
RECENT EVENTS
 
   
    WORLAND FIELD ACQUISITION.  Effective June 1, 1998 the Company completed an
$86.5 million acquisition of producing and non-producing oil and gas properties
in the Worland Field of the Big Horn Basin in
    
 
                                       1
<PAGE>
   
northern Wyoming (the "Worland Field Acquisition"). Effective the same date, the
Company sold an undivided 50% interest in the Worland Field properties
(excluding inventory and certain items of equipment) to Harold Hamm, the
Company's principal shareholder for $42.6 million. See "Certain Relationships
and Related Transactions." All references to the Worland Field Acquisition and
the related properties refer only to the Company's interest in the Worland Field
properties after giving effect to the sale to the Company's principal
shareholder. See "Principal Shareholders."
    
 
    Continental's interests in the Worland Field include 35,000 net leasehold
acres, on which are located 292 producing wells, 272 of which are operated by
the Company. As of December 31, 1997, the estimated net proved reserves
attributable to the Company's interest in the Worland Field properties were 32.0
MMBoe, with an estimated PV-10 of $25.4 million. The Worland Field properties
include six identified exploratory prospects for further extension of the known
producing reservoirs. The Worland Field Acquisition materially increases the
Company's proved reserves and provides additional exploration and exploitation
opportunities in areas similar to and near Continental's Williston Basin
operating area.
 
   
    CEDAR HILLS FIELD TRANSACTION.  On May 15, 1998, the Company entered into a
definitive agreement whereby, effective December 1, 1998, Continental and
Burlington Resources Oil & Gas Company ("Burlington"), an unrelated joint
interest owner in the Cedar Hills Field, will exchange undivided interests so
that the Company will ultimately own working interests ranging from 90% to 92%
in approximately 65,000 gross (59,000 net) leasehold acres in the northern half
of the Cedar Hills Field and the joint interest owner will acquire a substantial
portion of the Company's interests in the southern half of the Cedar Hills
Field. As a result of this agreement, the Company will enhance its ability to
unitize all interests in the northern half of the Cedar Hills Field which is
necessary in order for the Company to initiate its planned HPAI enhanced
recovery operations. See "Business--Rocky Mountains" for a discussion of a
dispute that may impede the consummation of the exchange of interests.
    
 
                            ------------------------
 
    The Company's principal executive and operating offices are located at Suite
300, Continental Tower, 302 North Independence, Enid, Oklahoma 73701, and its
telephone number is (580) 233-8955.
 
                                       2
<PAGE>
                               THE EXCHANGE OFFER
                          TERMS OF THE EXCHANGE OFFER
 
    This Exchange Offer is being made pursuant to the terms of the registration
rights agreement (the "Registration Rights Agreement") entered into between the
Company and Chase Securities, Inc. (the "Initial Purchaser") pursuant to the
terms of the Purchase Agreement dated July 21, 1998 between the Company and the
Placement Agents. See "The Exchange Offer--Purpose and Effect of the Exchange
Offer."
 
   
<TABLE>
<S>                                 <C>
The Exchange Offer................  Pursuant to the Exchange Offer, $1,000 principal amount
                                    of New Notes will be issued in exchange for each $1,000
                                    principal amount of Old Notes that are validly tendered
                                    and not withdrawn. As of October 16, 1998, a nominee for
                                    The Depository Trust Company was the only registered
                                    holder of Old Notes and $150,000,000 aggregate principal
                                    amount of Old Notes are outstanding. Holders of Old
                                    Notes whose Old Notes are not tendered and accepted in
                                    the Exchange Offer will continue to hold such Old Notes
                                    and will be entitled to all the rights and preferences
                                    and will be subject to the limitations applicable
                                    thereto under the Indenture governing the Old Notes and
                                    the New Notes. Following consummation of the Exchange
                                    Offer, the holders of Old Notes will continue to be
                                    subject to the existing restrictions upon transfer
                                    thereof and the Company will have no further obligation
                                    to such holders to provide for the registration under
                                    the Securities Act of the Old Notes held by them.
                                    Following the completion of the Exchange Offer, none of
                                    the Notes will be entitled to the contingent increase in
                                    interest rate provided with respect to the Old Notes.
 
Resale............................  Based on interpretations by the staff of the Commission
                                    set forth in no-action letters issued to third parties,
                                    the Company believes the New Notes issued pursuant to
                                    the Exchange Offer may be offered for resale, resold and
                                    otherwise transferred by any holder thereof (other than
                                    broker-dealers, as set forth below, and any such holder
                                    that is an affiliate of the Company within the meaning
                                    of Rule 405 under the Securities Act) without compliance
                                    with the registration and prospectus delivery provisions
                                    of the Securities Act, provided that such New Notes are
                                    acquired in the ordinary course of such holder's
                                    business and that such holder has no arrangement or
                                    understanding with any person to participate in the
                                    distribution of such New Notes. Any holder who tenders
                                    in the Exchange Offer with the intention to participate,
                                    or for the purpose of participating, in a distribution
                                    of the New Notes or who is an affiliate of the Company
                                    may not rely upon such interpretations by the staff of
                                    the Commission and, in the absence of an exemption
                                    therefrom, must comply with the registration and
                                    prospectus delivery requirements of the Securities Act
                                    in connection with any secondary resale transaction.
                                    Failure to comply with such requirements in such
                                    instance may result in such holder incurring liabilities
                                    under the Securities Act for which the holder is not
                                    indemnified by the Company. Each broker-dealer (other
                                    than an affiliate of the
</TABLE>
    
 
                                       3
<PAGE>
 
   
<TABLE>
<S>                                 <C>
                                    Company) that receives New Notes for its own account
                                    pursuant to the Exchange Offer must acknowledge that it
                                    will deliver a prospectus meeting the requirements of
                                    the Securities Act in connection with any resale of such
                                    New Notes. The Letter of Transmittal states that by so
                                    acknowledging and by delivering a prospectus, a
                                    broker-dealer will not be deemed to admit that it is an
                                    underwriter within the meaning of the Securities Act.
                                    The Company has agreed that, for a period of 180 days
                                    after the Exchange Date, it will make this Prospectus
                                    available to any broker-dealer for use in connection
                                    with any such resale. See "Plan of Distribution."
                                    The Exchange Offer is not being made to, nor will the
                                    Company accept surrenders for exchange from, holders of
                                    Old Notes in any jurisdiction in which this Exchange
                                    Offer or the acceptance thereof would not be in
                                    compliance with the securities or blue sky laws of such
                                    jurisdiction.
 
Expiration Date...................  The Exchange Offer will expire at 5:00 p.m., New York
                                    City time, on November   , 1998, unless extended, in
                                    which case the term Expiration Date shall mean the
                                    latest date and time to which the Exchange Offer is
                                    extended. Any extension, if made, will be publicly
                                    announced through a release to the Dow Jones News
                                    Service and as otherwise required by applicable law or
                                    regulations.
 
Conditions to the Exchange
  Offer...........................  The Exchange Offer is subject to certain conditions,
                                    which may be waived by the Company. See "The Exchange
                                    Offer-- Conditions of the Exchange Offer." The Exchange
                                    Offer is not conditioned upon any minimum principal
                                    amount of Old Notes being tendered.
Procedures for Tendering
  Old Notes.......................  Each holder of Old Notes wishing to accept the Exchange
                                    Offer must complete, sign and date the Letter of
                                    Transmittal, or a facsimile thereof, in accordance with
                                    the instructions contained herein and therein, and mail
                                    or otherwise deliver such Letter of Transmittal, or a
                                    facsimile thereof, together with such Old Notes and any
                                    other required documentation to United States Trust
                                    Company of New York, the Exchange Agent, at the address
                                    set forth herein and therein. By executing the Letter of
                                    Transmittal, each holder will represent to the Company
                                    that, among other things, the New Notes acquired
                                    pursuant to the Exchange Offer are being obtained in the
                                    ordinary course of business of the person receiving such
                                    New Notes, whether or not such person is the holder,
                                    that neither the holder nor any such other person has an
                                    arrangement or understanding with any person to
                                    participate in the distribution of such New Notes and
                                    that neither the holder nor any such other person is an
                                    affiliate of the Company within the meaning of Rule 405
                                    under the Securities Act. See "The Exchange Offer--Terms
                                    of the Exchange Offer--Procedures for Tendering Old
                                    Notes" and "The Exchange Offer--Terms of the Exchange
                                    Offer--Guaranteed Delivery Procedures."
Special Procedures for Beneficial
  Owners..........................  Any beneficial owner whose Old Notes are registered in
                                    the
</TABLE>
    
 
                                       4
<PAGE>
 
<TABLE>
<S>                                 <C>
                                    name of a broker, dealer, commercial bank, trust company
                                    or other nominee and who wishes to tender such Old Notes
                                    in the Exchange Offer should contact such registered
                                    holder promptly and instruct such registered holder to
                                    tender on such beneficial owner's behalf. If such
                                    beneficial owner wishes to tender on its own behalf,
                                    such owner must, prior to completing and executing the
                                    Letter of Transmittal and delivering its Old Notes,
                                    either make appropriate arrangements to register
                                    ownership of the Old Notes in such owner's name or
                                    obtain a properly completed stock power from the
                                    registered holder. The transfer of registered ownership
                                    may take considerable time and may not be able to be
                                    completed prior to the Expiration Date. See "The
                                    Exchange Offer--Terms of the Exchange Offer--Procedures
                                    for Tendering Old Notes."
 
Guaranteed Delivery Procedures....  Holders of Old Notes who wish to tender their Old Notes
                                    and whose Old Notes are not immediately available or who
                                    cannot deliver their Old Notes, the Letter of
                                    Transmittal or any other documents required by the
                                    Letter of Transmittal to the Exchange Agent prior to the
                                    Expiration Date, must tender their Old Notes according
                                    to the guaranteed delivery procedures set forth in "The
                                    Exchange Offer--Terms of the Exchange Offer-- Guaranteed
                                    Delivery Procedures."
Acceptance of Old Notes and
  Delivery of New Notes...........  Subject to certain conditions (as described more fully
                                    in "The Exchange Offer--Conditions of the Exchange
                                    Offer"), the Company will accept for exchange any and
                                    all Old Notes which are properly tendered in the
                                    Exchange Offer and not withdrawn prior to 5:00 p.m., New
                                    York City time, on the Expiration Date. The New Notes
                                    issued pursuant to the Exchange Offer will be delivered
                                    as promptly as practicable following the Expiration
                                    Date.
 
Withdrawal Rights.................  Except as otherwise provided herein, tenders of Old
                                    Notes may be withdrawn at any time prior to 5:00 p.m.,
                                    New York City time, on the Expiration Date. See "The
                                    Exchange Offer--Terms of the Exchange Offer--Withdrawal
                                    of Tenders of Old Notes."
Certain Federal Income Tax
  Considerations..................  For a discussion of certain federal income tax
                                    considerations relating to the exchange of New Notes for
                                    Old Notes, see "Certain United States Tax Consequences."
 
Exchange Agent....................  United States Trust Company of New York is the Exchange
                                    Agent. The address, telephone number and facsimile
                                    number of the Exchange Agent are set forth in "The
                                    Exchange Offer-- Exchange Agent."
</TABLE>
 
                                       5
<PAGE>
                             TERMS OF THE NEW NOTES
 
    The Exchange Offer applies to all $150,000,000 aggregate principal amount of
Old Notes outstanding. The form and terms of the New Notes will be identical in
all material respects to the form and terms of the Old Notes except that the New
Notes will be registered under the Securities Act and, therefore, will not bear
legends restricting the transfer thereof. The New Notes will evidence the same
debt as the Old Notes, will be entitled to the benefits of the Indenture and
will be treated as a single class thereunder with any Old Notes that remain
outstanding. Following the Exchange Offer, none of the Notes will be entitled to
the contingent increase in interest rate provided for in accordance with the
terms of the Registration Rights Agreement which rights will terminate upon
consummation of the Exchange Offer. See "Description of the Notes."
 
<TABLE>
<S>                                 <C>
Issuer............................  Continental Resources, Inc.
Securities Offered................  $150,000,000 aggregate principal amount of 10 1/4%
                                    Senior Subordinated Notes due 2008.
Maturity Date.....................  August 1, 2008.
Interest Payment Dates............  February 1 and August 1 of each year, commencing on
                                    February 1, 1999.
Mandatory Redemption..............  None.
Optional Redemption...............  Except as described below, the Notes will not be
                                    redeemable at the Company's option prior to August 1,
                                    2003. Thereafter, the Notes will be subject to
                                    redemption at any time at the option of the Company, in
                                    whole or in part, at the redemption prices set forth
                                    herein, plus accrued and unpaid interest thereon to the
                                    applicable redemption date. In addition, prior to August
                                    1, 2001, the Company may, at its option, on any one or
                                    more occasions, redeem up to 35% of the original
                                    aggregate principal amount of the Notes at a redemption
                                    price of 110.25% of the principal amount thereof, plus
                                    accrued and unpaid interest, if any, thereon to the
                                    redemption date, with the net cash proceeds of one or
                                    more public offerings of common stock of the Company;
                                    provided that at least 65% of the original aggregate
                                    principal amount of the Notes remains outstanding
                                    immediately after the occurrence of such redemption. See
                                    "Description of Notes-- Optional Redemption."
Change of Control.................  Upon the occurrence of a Change of Control, (i) the
                                    Company will have the option, at any time, on or prior
                                    to August 1, 2003 (but in no event more than 90 days
                                    after the occurrence of such Change of Control), to
                                    redeem the Notes, in whole but not in part, at a
                                    redemption price equal to 100% of the principal amount
                                    thereof plus the Applicable Premium as of, and accrued
                                    and unpaid interest, if any, to, the date of redemption,
                                    and (ii) if the Company does not so redeem the Notes,
                                    the Company will be required to offer to repurchase all
                                    or a portion of each Holder's Notes, at an offer price
                                    in each case equal to 101% of the aggregate principal
                                    amount of such Notes plus accrued and unpaid interest,
                                    if any, to the date of repurchase, and to repurchase all
                                    Notes tendered pursuant to such offer. The Credit
                                    Facility prohibits the Company from repurchasing any
                                    Notes pursuant to a Change of Control offer prior to the
                                    repayment in full of the Senior Debt under the Credit
                                    Facility. If a Change of Control were to occur, the
                                    Company may not have
</TABLE>
 
                                       6
<PAGE>
 
   
<TABLE>
<S>                                 <C>
                                    sufficient available funds to purchase all Notes
                                    tendered pursuant to the Change of Control offer after
                                    first satisfying its obligations under the Credit
                                    Facility or other Senior Debt that may then be
                                    outstanding, if accelerated. The failure by the Company
                                    to purchase all Notes tendered pursuant to the Change of
                                    Control offer would constitute an Event of Default (as
                                    defined). If any Event of Default occurs, the Trustee
                                    (as defined) or holders of at least 25% in principal
                                    amount of the Notes then outstanding may declare the
                                    principal of and the accrued and unpaid interest on such
                                    Notes to be due and payable immediately. However, such
                                    repayment would be subject to certain subordination
                                    provisions in the Indenture (as defined). See "Risk
                                    Factors--Repurchase of Notes Upon a Change of Control
                                    and Certain Other Events" and "Description of
                                    Notes--Ranking and Subordination" and "--Repurchase at
                                    the Option of Holders--Change of Control," and "--Events
                                    of Default and Remedies."
Ranking...........................  The Notes are general unsecured obligations of the
                                    Company and are subordinated in right of payment to all
                                    existing and future Senior Debt of the Company, which
                                    will include borrowings under the Credit Facility. The
                                    Notes will rank equally in right of payment with all
                                    other senior subordinated debt of the Company and any
                                    other indebtedness which does not expressly provide that
                                    it is subordinated in right of payment to the Notes. As
                                    of June 30, 1998, on a pro forma basis after giving
                                    effect to the consummation of the Offering and the
                                    application of the proceeds therefrom and the Worland
                                    Field Acquisition and related financing, the aggregate
                                    principal amount of Senior Debt outstanding would have
                                    been approximately $3.8 million (exclusive of $75.0
                                    million of unused commitments under the Credit Facility)
                                    and there would have been no senior subordinated debt
                                    outstanding (exclusive of the Notes). The Notes will
                                    also be effectively subordinated to all secured
                                    indebtedness of the Company, including indebtedness
                                    under the Credit Facility. See "Capitalization,"
                                    "Description of Notes-- Ranking and Subordination" and
                                    "Description of Credit Facility."
Subsidiary Guarantees.............  The Company's payment obligations under the Notes are
                                    jointly, severally and unconditionally guaranteed on a
                                    senior subordinated basis by each Restricted Subsidiary
                                    of the Company and any future Restricted Subsidiary of
                                    the Company. The Subsidiary Guarantees are subordinated
                                    to all Guarantor Senior Debt of the Subsidiary
                                    Guarantors substantially to the same extent and manner
                                    as the Notes are subordinated to Senior Debt. At June
                                    30, 1998, on a pro forma basis, there would have been no
                                    Guarantor Senior Debt outstanding other than the
                                    guarantees of the Credit Facility and the Subsidiary
                                    Guarantees. Each Subsidiary Guarantee will be
                                    effectively subordinated to all secured indebtedness of
                                    the relevant Subsidiary Guarantor, including
                                    indebtedness under the Credit Facility. See "Description
                                    of Notes--Subsidiary Guarantees" and "Description of
                                    Credit Facility."
</TABLE>
    
 
                                       7
<PAGE>
 
<TABLE>
<S>                                 <C>
Certain Covenants.................  The Notes are issued pursuant to an indenture (the
                                    "Indenture") containing certain covenants that, among
                                    other things, limits the ability of the Company and its
                                    Restricted Subsidiaries to incur additional indebtedness
                                    and issue Disqualified Capital Stock (as defined), pay
                                    dividends, make distributions, make investments, make
                                    certain other Restricted Payments (as defined), enter
                                    into certain transactions with affiliates, dispose of
                                    certain assets, incur liens securing Indebtedness (as
                                    defined) of any kind other than Permitted Liens (as
                                    defined) and engage in mergers and consolidations. See
                                    "Description of Notes--Certain Covenants."
Book-Entry; Delivery
  and Form........................  Transfers of Notes between participants and The
                                    Depository Trust Company ("DTC") will be effected in the
                                    ordinary way in accordance with DTC rules and will be
                                    settled in same-day funds. See "Description of the
                                    Notes."
</TABLE>
 
                                USE OF PROCEEDS
 
   
    The Company will not receive any proceeds from the issuance of the New Notes
pursuant to this Prospectus. The net proceeds from the issuance and sale of the
Old Notes were $145.9 million. The Company used $143.2 million of such net
proceeds to reduce the outstanding balance under the Credit Facility and the
balance for general corporate purposes. Advances under the Credit Facility were
used to complete the Worland Field Acquisition, for operations and for working
capital, and bore interest at variable rates for which the weighted average
annual rate at June 30, 1998, was 7.5%.
    
 
                                  RISK FACTORS
 
    See "Risk Factors," immediately following this Summary, for a discussion of
certain factors relating to the Company, its business and an investment in the
Notes.
 
                                       8
<PAGE>
                SUMMARY HISTORICAL AND PRO FORMA FINANCIAL DATA
 
   
    The following tables set forth certain historical and pro forma financial
data. The pro forma financial information gives effect to the Worland Field
Acquisition and the related financing, including the Offering, as described in
the notes to the Unaudited Pro Forma Financial Statements. The pro forma
statement of operations data give effect to the Worland Field Acquisition and
related financing, including the Offering, as if they had occurred on January 1,
1997, and the pro forma balance sheet data give effect to the Worland Field
Acquisition and related financing, including the Offering, as if they had
occurred on June 30, 1998. The pro forma financial information does not purport
to represent what the Company's results of operations would have been if the
Worland Field Acquisition and related financing, including the Offering, had
been completed on such dates nor does it indicate the future financial position
or future results of operations of the Company. The information set forth below
should be read in conjunction with "Unaudited Pro Forma Consolidated Financial
Statements," "Selected Consolidated Financial Data," "Management's Discussion
and Analysis of Financial Condition and Results of Operations," and the
Financial Statements included elsewhere herein.
    
 
   
<TABLE>
<CAPTION>
                                                                                                       SIX MONTHS ENDED
                                                          YEAR ENDED DECEMBER 31,                          JUNE 30,
                                                --------------------------------------------  ----------------------------------
                                                                                  PRO FORMA                           PRO FORMA
                                                  1995       1996       1997        1997        1997        1998        1998
                                                ---------  ---------  ---------  -----------  ---------  ----------  -----------
                                                                             (DOLLARS IN THOUSANDS)
<S>                                             <C>        <C>        <C>        <C>          <C>        <C>         <C>
STATEMENT OF OPERATIONS DATA:
Revenue:
  Oil and gas sales...........................  $  30,576  $  75,016  $  78,599   $  88,725   $  39,135  $   31,291   $  33,418
  Gathering, marketing and processing.........     20,639     25,766     25,021      25,021      15,522       9,804       9,804
  Oil and gas service operations..............      6,148      6,491      6,405       6,405       3,715       3,062       3,062
                                                ---------  ---------  ---------  -----------  ---------  ----------  -----------
Total revenues................................     57,363    107,273    110,025     120,151      58,372      44,157      46,284
Operating costs and expenses:
  Production expenses and taxes...............      7,611     19,338     20,748      25,958      10,622       9,074      10,342
  Exploration expenses........................      6,184      4,512      6,806       6,806       3,410       2,650       2,650
  Gathering, marketing and processing.........     13,223     21,790     22,715      22,715      12,873       8,409       8,409
  Oil and gas service operations..............      3,680      4,034      3,654       3,654       1,855       1,825       1,825
  Depreciation, depletion and amortization....      9,614     22,876     33,354      34,930      16,713      16,483      17,935
  General and administrative..................      8,260      9,155      8,990       8,990       3,986       4,914       4,914
                                                ---------  ---------  ---------  -----------  ---------  ----------  -----------
Total operating costs and expenses............     48,572     81,705     96,267     103,053      49,459      43,355      46,075
                                                ---------  ---------  ---------  -----------  ---------  ----------  -----------
Operating income..............................      8,791     25,568     13,758      17,098       8,913         802         209
Interest income...............................        137        312        241       1,591         104         780         830
Interest expense..............................     (2,396)    (4,550)    (4,804)    (15,684)     (2,313)     (5,174)     (7,836)
Other income (expense), net(1)................       (411)       233      8,061       8,061         685          93          92
                                                ---------  ---------  ---------  -----------  ---------  ----------  -----------
Income (loss) before income taxes.............      6,121     21,563     17,256      11,066       7,389      (3,499)     (6,705)
Federal and state income taxes (benefit)(2)...      2,252      8,238     (8,941)     (8,941)     (8,941)     --          --
                                                ---------  ---------  ---------  -----------  ---------  ----------  -----------
Net income (loss).............................  $   3,869  $  13,325  $  26,197   $  20,007   $  16,330  $   (3,499)  $  (6,705)
                                                ---------  ---------  ---------  -----------  ---------  ----------  -----------
                                                ---------  ---------  ---------  -----------  ---------  ----------  -----------
OTHER FINANCIAL DATA:
  Adjusted EBITDA(3)..........................  $  24,315  $  53,502  $  54,721   $  61,447   $  29,825  $   20,808   $  21,716
  Net cash provided by operations.............     18,985     41,724     51,477      46,963      27,948       9,669         794
  Net cash used in investing..................    (58,022)   (50,619)   (78,359)   (116,710)    (39,673)   (116,132)    (73,581)
  Net cash provided by (used in) financing....     37,994     10,494     24,863      99,190       8,556     106,498      64,725
  Capital expenditures(4).....................     58,226     50,341     80,937     114,838      41,678     116,534     116,534
RATIOS:
  Adjusted EBITDA to interest expense.........       10.1x      11.8x      11.4x        3.9x       12.9x        4.0x        2.8x
  Total debt to Adjusted EBITDA...............        1.8x       1.0x       1.5x        2.5x        n/a         n/a         n/a
  Earnings to fixed charges(5)................        3.6x       5.7x       4.6x        1.7x        4.2x        n/a         n/a
</TABLE>
    
 
                                       9
<PAGE>
 
   
<TABLE>
<CAPTION>
                                                                                                AT JUNE 30, 1998
                                                                                             ----------------------
                                                                                              ACTUAL     PRO FORMA
                                                                                             ---------  -----------
                                                                                             (DOLLARS IN THOUSANDS)
<S>                                                                                          <C>        <C>
BALANCE SHEET DATA:
  Cash and cash equivalents................................................................  $   1,336   $   2,114
  Total assets.............................................................................    257,863     247,613
  Long-term debt, including current maturities.............................................    164,052     153,802
  Stockholders' equity.....................................................................     74,765      74,765
</TABLE>
    
 
- --------------------------
 
(1) In 1997, other income includes $7.5 million resulting from the settlement of
    certain litigation matters.
 
(2) Effective June 1, 1997, the Company elected to be treated as a S Corporation
    for federal income tax purposes. The conversion resulted in the elimination
    of the Company's deferred income tax assets and liabilities existing at May
    31, 1997, and, after being netted against the then existing tax provision,
    resulted in a net income tax benefit to the Company of $8.9 million.
 
   
(3) Adjusted EBITDA represents earnings before interest expense, income taxes,
    depreciation, depletion, amortization and exploration expense, excluding
    proceeds from litigation settlements. Adjusted EBITDA is not a measure of
    cash flow as determined by generally accepted accounting principles
    ("GAAP"). Adjusted EBITDA should not be considered as an alternative to, or
    more meaningful than, net income or cash flow as determined in accordance
    with GAAP or as an indicator of a company's operating performance or
    liquidity. Certain items excluded from Adjusted EBITDA are significant
    components in understanding and assessing a company's financial performance,
    such as a company's cost of capital and tax structure, as well as historic
    costs of depreciable assets, none of which are components of Adjusted
    EBITDA. The Company's computation of Adjusted EBITDA may not be comparable
    to other similarly titled measures of other companies. The Company believes
    that Adjusted EBITDA is a widely followed measure of operating performance
    and may also be used by investors to measure the Company's ability to meet
    future debt service requirements, if any. Even though the volume of oil and
    gas produced by the Company during the six months ended June 30, 1998, on an
    actual and pro forma basis, was greater than in the comparable period in
    1997, the Company's Adjusted EBITDA for the 1998 period was less than in
    1997. The decrease in Adjusted EBITDA for the 1998 period was attributable
    to declines in oil and gas prices. Adjusted EBITDA does not give effect to
    the Company's exploration expenditures, which are largely discretionary by
    the Company and which, to the extent expended, would reduce cash available
    for debt service, repayment of indebtedness and dividends.
    
 
(4) Capital expenditures include costs related to acquisitions of producing oil
    and gas properties.
 
(5) For purposes of computing the ratio of earnings to fixed charges, earnings
    are computed as income before taxes from continuing operations, plus fixed
    charges. Fixed charges consist of interest expense and amortization of costs
    incurred in the Offering.
 
                                       10
<PAGE>
                       SUMMARY RESERVE AND OPERATING DATA
 
   
    The following tables set forth summary information with respect to estimated
proved oil and gas reserves and certain operating data as of December 31, 1995,
1996, 1997 and June 30, 1997 and 1998 and on a pro forma basis as of December
31, 1997 and June 30, 1998 to give effect to the Worland Field Acquisition. See
"Risk Factors," "Management's Discussion and Analysis of Financial Condition and
Results of Operations," "Business and Properties" "Reserve Engineers" and the
Financial Statements included elsewhere herein.
    
 
   
<TABLE>
<CAPTION>
                                                                               YEAR ENDED DECEMBER 31,
                                                                      ------------------------------------------
                                                                                                          PRO
                                                                                                         FORMA
                                                                        1995       1996       1997      1997(1)
                                                                      ---------  ---------  ---------  ---------
<S>                                                                   <C>        <C>        <C>        <C>
ESTIMATED PROVED RESERVES (at December 31):
  Oil and condensate (MBbl).........................................     17,501     19,492     24,719     51,967
  Natural gas (MMcf)................................................     54,820     50,535     49,378     77,848
  Oil equivalents (MBoe)............................................     26,638     27,915     32,949     64,942
  Percent oil.......................................................       65.7%      69.8%      75.0%      80.0%
  Percentage proved developed.......................................       80.3%      84.0%      83.0%      63.0%
PRODUCT PRICES (at December 31)(2):
  Oil and condensate (per Bbl)(3)...................................  $   23.00  $   23.00  $   18.06  $   14.59
  Natural gas (per Mcf)(3)..........................................       3.28       3.28       2.25       2.07
FUTURE NET CASH FLOWS BEFORE TAX ($000):
  Undiscounted(3)...................................................    405,329    420,211    386,810    545,029
  Discounted(3)(4)..................................................    206,650    258,278    241,625    267,016
  Standardized measure of discounted future cash flows(5)...........
ESTIMATED RESERVE LIFE INDEX (years)(6).............................       12.0        7.0        7.0       12.5
RESERVE ADDITIONS (MBoe):
  Acquisition.......................................................      6,968        307      -         31,993
  Extensions, discoveries and revisions.............................      4,941      5,246      9,894      9,894
                                                                      ---------  ---------  ---------  ---------
  Net additions.....................................................     11,909      5,553      9,894     41,887
                                                                      ---------  ---------  ---------  ---------
                                                                      ---------  ---------  ---------  ---------
COSTS INCURRED ($000):
  Acquisitions......................................................  $  16,293  $   3,327  $     476  $  44,426
  Exploration and development.......................................     22,516     37,501     59,060     59,060
                                                                      ---------  ---------  ---------  ---------
  Total costs incurred..............................................  $  38,809  $  40,828  $  59,536  $ 103,486
                                                                      ---------  ---------  ---------  ---------
                                                                      ---------  ---------  ---------  ---------
AVERAGE FINDING COSTS (per Boe)(7)..................................  $    3.26  $    7.35  $    6.02  $    2.47
THREE YEAR WEIGHTED AVERAGE FINDING COSTS
  (per Boe)(8)......................................................       3.39       4.69       5.09       3.09
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                            YEAR ENDED DECEMBER 31,                 SIX MONTHS ENDED JUNE 30,
                                                  --------------------------------------------  ---------------------------------
                                                                                       PRO                                PRO
                                                                                      FORMA                              FORMA
                                                    1995       1996       1997       1997(9)      1997       1998       1998(9)
                                                  ---------  ---------  ---------  -----------  ---------  ---------  -----------
<S>                                               <C>        <C>        <C>        <C>          <C>        <C>        <C>
PRODUCTION VOLUMES(10):
  Oil and condensate (MBbls)....................      1,199      2,888      3,518       4,146       1,615      1,983       2,244
  Natural gas (MMcf)............................      5,880      6,527      5,789       6,399       2,881      2,933       3,314
  Total (MBoe)..................................      2,179      3,976      4,483       5,213       2,095      2,472       2,796
UNIT ECONOMICS:
  Average sales price per Bbl...................  $   17.11  $   20.78  $   18.61   $   18.14   $   20.08  $   13.14   $   12.45
  Average sales price per mcf...................       1.40       2.13       2.21        2.03        2.33       1.79        1.66
  Average equivalent price (per Boe)(11)........  $   14.03  $   18.87  $   17.53   $   17.02   $   18.68  $   12.66   $   11.95
  Lifting cost (per Boe)(12)....................       3.49       4.86       4.63        4.98        5.07       3.67        3.60
  Depreciation, depletion and amortization (per
    Boe)(12)....................................       3.76       5.44       6.74        6.01        7.31       5.95        5.62
  General and administrative expense(13)........       2.74       1.64       1.47        1.26        1.04        .58        1.40
                                                  ---------  ---------  ---------  -----------  ---------  ---------  -----------
  Gross margin..................................  $    4.04  $    6.93  $    4.69   $    4.77   $    5.26  $    1.46   $    1.83
                                                  ---------  ---------  ---------  -----------  ---------  ---------  -----------
                                                  ---------  ---------  ---------  -----------  ---------  ---------  -----------
</TABLE>
    
 
                See Notes to Summary Reserve and Operating Data.
 
                                       11
<PAGE>
                  NOTES TO SUMMARY RESERVE AND OPERATING DATA
 
(1) To give effect to the Worland Field Acquisition as if it had occurred on
    December 31, 1997.
 
(2) Reflects the actual realized prices received by the Company, including the
    results of the Company's hedging activities. See "Management's Discussion
    and Analysis of Financial Condition and Results of Operations."
 
(3) In 1996, the Company changed its fiscal year-end from May 31 to December 31.
    Because reports on a December 31 year-end basis prior to 1996 were not
    available, information as of December 31, 1995 was determined from the
    Company's production, drilling, acquisition and sale data as applied to its
    December 31, 1996 reserve report.
 
   
(4) Represents the present value of estimated future net cash flows before
    income tax discounted at 10%, using prices in effect at the end of the
    respective periods presented and including the effects of hedging
    activities. In accordance with applicable requirements of the Commission,
    estimates of the Company's proved reserves and future net cash flows are
    made using oil and gas sales prices estimated to be in effect as of the date
    of such reserve estimates and are held constant throughout the life of the
    properties (except to the extent a contract specifically provides for
    escalation). The prices used in calculating PV-10 as of December 31, 1997
    were $18.06 per Bbl of oil and $2.25 per Mcf of natural gas. Average prices
    as of September 30, 1998, on a pro forma basis, were $12.95 per Bbl of oil
    and $1.66 per Mcf of natural gas. These prices, if applied to estimated
    proved reserves of the Company as of December 31, 1997, would result in a
    PV-10, on a pro forma basis, of $208.7 million at such date, as estimated by
    the Company.
    
 
   
(5) The discounted future net cash flows before tax have been determined on the
    same basis as the Standardized Measure of Discounted Future Cash Flows under
    SFAS 69, except that no effect was given for future income taxes because the
    Company is an S Corporation for federal income tax purposes and is not a
    taxpaying entity.
    
 
   
(6) Reserve life index is calculated by dividing proved reserves by annual
    production (on a Boe basis).
    
 
   
(7) Average finding cost is calculated by dividing total costs incurred by
    reserve additions.
    
 
   
(8) The three year weighted average finding cost is calculated by dividing the
    sum of the finding costs for the three years ended on December 31 of each of
    the referenced years by the sum of the reserve additions for each of such
    years.
    
 
   
(9) To give effect to the Worland Field Acquisition as if it had occurred on
    January 1, 1997.
    
 
   
(10) Production volumes are derived from the Company's production records and
    reflect actual quantities of oil and gas produced without regard to the time
    of receipt of proceeds from the sale of such production.
    
 
   
(11) Calculated by dividing oil and gas revenues, as reflected on the Financial
    Statements, by production volumes on a Boe basis. Oil and gas revenues
    reflected in the Financial Statements are recognized as production is sold
    and may differ from oil and gas revenues reflected on the Company's
    production records which reflect oil and gas revenues by date of production.
    
 
   
(12) Relates to drilling and development activities.
    
 
   
(13) Relates to drilling and development activities, net of operating overhead
    income.
    
 
                                       12
<PAGE>
                                  RISK FACTORS
 
    IN ADDITION TO THE OTHER INFORMATION SET FORTH ELSEWHERE IN THIS PROSPECTUS,
THE FOLLOWING FACTORS RELATING TO THE COMPANY AND THE OFFERING SHOULD BE
CONSIDERED WHEN EVALUATING AN INVESTMENT IN THE NOTES OFFERED HEREBY.
 
VOLATILITY OF OIL AND GAS PRICES
 
    The Company's revenues, profitability and future rate of growth are
substantially dependent upon prevailing prices for oil and gas and natural gas
liquids, which are dependent upon numerous factors such as weather, economic,
political and regulatory developments and competition from other sources of
energy. The Company is affected more by fluctuations in oil prices than natural
gas prices, because a majority of its production is oil. The volatile nature of
the energy markets and the unpredictability of actions of OPEC members make it
particularly difficult to estimate future prices of oil and gas and natural gas
liquids. Prices of oil and gas and natural gas liquids are subject to wide
fluctuations in response to relatively minor changes in circumstances, and there
can be no assurance that future prolonged decreases in such prices will not
occur. All of these factors are beyond the control of the Company. Any
significant decline in oil and, to a lesser extent, in natural gas prices would
have a material adverse effect on the Company's results of operations and
financial condition. Although the Company may enter into hedging arrangements
from time to time to reduce its exposure to price risks in the sale of its oil
and gas, the Company's hedging arrangements are likely to apply to only a
portion of its production and provide only limited price protection against
fluctuations in the oil and gas markets. See "Management' s Discussion and
Analysis of Financial Condition and Results of Operations" and "Business and
Properties--Oil and Gas Marketing."
 
REPLACEMENT OF RESERVES
 
    The Company's future success depends upon its ability to find, develop or
acquire additional oil and gas reserves that are economically recoverable.
Unless the Company successfully replaces the reserves that it produces (through
successful development, exploration or acquisition), the Company's proved
reserves will decline. There can be no assurance that the Company will continue
to be successful in its effort to increase or replace its proved reserves.
Approximately 37% of the Company's estimated proved reserves at December 31,
1997, on a pro forma basis, was attributable to undeveloped reserves. Recovery
of such reserves will require significant capital expenditures and successful
drilling operations. There can be no certainty regarding the results of
developing these reserves. To the extent the Company is unsuccessful in
replacing or expanding its estimated proved reserves, the Company may be unable
to pay the principal of and interest on the Notes in accordance with their
terms, or otherwise to satisfy certain of its covenants contained in the
Indenture. See "Description of Notes--Certain Covenants."
 
UNCERTAINTY OF ESTIMATES OF OIL AND GAS RESERVES AND FUTURE NET CASH FLOWS
 
    This Prospectus contains estimates of the Company's oil and gas reserves and
the future net cash flows from those reserves which have been prepared by the
Company and certain independent petroleum consultants. Reserve engineering is a
subjective process of estimating the recovery from underground accumulations of
oil and gas that cannot be measured in an exact manner, and the accuracy of any
reserve estimate is a function of the quality of available data and of
engineering and geological interpretation and judgment. There are numerous
uncertainties inherent in estimating quantities and future values of proved oil
and gas reserves, including many factors beyond the control of the Company. Each
of the estimates of proved oil and gas reserves, future net cash flows and
discounted present values relies upon various assumptions, including assumptions
required by the Commission as to constant oil and gas prices, drilling and
operating expenses, capital expenditures, taxes and availability of funds. The
process of estimating oil and gas reserves is complex, requiring significant
decisions and assumptions in the evaluation of available geological,
geophysical, engineering and economic data for each reservoir. As a result, such
estimates are inherently imprecise. Actual future production, oil and gas
prices, revenues, taxes, development expenditures, operating expenses and
quantities of recoverable oil and gas reserves may vary substantially from
 
                                       13
<PAGE>
   
those estimated in the report. Any significant variance in these assumptions
could materially affect the estimated quantity and value of reserves set forth
in this Prospectus. In addition, the Company's reserves may be subject to
downward or upward revision, based upon production history, results of future
exploration and development, prevailing oil and gas prices and other factors,
many of which are beyond the Company's control. The PV-10 of the Company's
proved oil and gas reserves does not necessarily represent the current or fair
market value of such proved reserves, and the 10% discount rate required by the
Commission may not reflect current interest rates, the Company's cost of capital
or any risks associated with the development and production of the Company's
proved oil and gas reserves. At December 31, 1997, the estimated future net cash
flows and PV-10 of $545.0 million and $267.0 million, respectively, attributable
to the Company's proved oil and gas reserves, on a pro forma basis, are based on
prices in effect at that date ($14.59 per Bbl of oil and $2.07 per Mcf of
natural gas), which may be materially different than actual future prices. As of
September 30, 1998, the average prices were $12.95 Bbl of oil and $1.66 per Mcf
of natural gas, on a pro forma basis. If such prices were applied to the
Company's proved oil and gas reserves at December 31, 1997, the estimated future
net cash flows and PV-10 at December 31, 1997 would have been approximately
$472.9 million and $208.7 million, respectively.
    
 
PROPERTY ACQUISITION RISKS
 
    The Company's growth strategy includes the acquisition of oil and gas
properties. There can be no assurance, however, that the Company will be able to
identify attractive acquisition opportunities, obtain financing for acquisitions
on satisfactory terms or successfully acquire identified targets. In addition,
no assurance can be given that the Company will be successful in integrating
acquired businesses into its existing operations, and such integration may
result in unforeseen operational difficulties or require a disproportionate
amount of management's attention. Future acquisitions may be financed through
the incurrence of additional indebtedness to the extent permitted under the
Indenture or through the issuance of capital stock. Furthermore, there can be no
assurance that competition for acquisition opportunities in these industries
will not escalate, thereby increasing the cost to the Company of making further
acquisitions or causing the Company to refrain from making additional
acquisitions.
 
    The Company is subject to risks that properties acquired by it (including
those acquired in the Worland Field Acquisition) will not perform as expected
and that the returns from such properties will not support the indebtedness
incurred or the other consideration used to acquire, or the capital expenditures
needed to develop, the properties. The addition of the Worland Field properties
may result in additional impairment of the Company's oil and gas properties to
the extent the Company's net book value of such properties exceeds the projected
discounted future net revenues of the related proved reserves. See "--Writedown
of Carrying Values." In addition, expansion of the Company's operations may
place a significant strain on the Company's management, financial and other
resources. The Company's ability to manage future growth will depend upon its
ability to monitor operations, maintain effective cost and other controls and
significantly expand the Company's internal management, technical and accounting
systems, all of which will result in higher operating expenses. Any failure to
expand these areas and to implement and improve such systems, procedures and
controls in an efficient manner at a pace consistent with the growth of the
Company's business could have a material adverse effect on the Company's
business, financial condition and results of operations. In addition, the
integration of acquired properties with existing operations will entail
considerable expenses in advance of anticipated revenues and may cause
substantial fluctuations in the Company's operating results. There can be no
assurance that the Company will be able to successfully integrate the properties
acquired and to be acquired or any other businesses it may acquire.
 
SUBSTANTIAL CAPITAL REQUIREMENTS
 
    The Company has made, and will continue to make, substantial capital
expenditures in connection with the acquisition, development, exploitation,
exploration and production of its oil and gas properties. Historically, the
Company has funded its capital expenditures through borrowings from banks and
from its
 
                                       14
<PAGE>
principal stockholder, and cash flow from operations. Future cash flows and the
availability of credit are subject to a number of variables, such as the level
of production from existing wells, borrowing base determinations, prices of oil
and gas and the Company's success in locating and producing new oil and gas
reserves. If revenues were to decrease as a result of lower oil and gas prices,
decreased production or otherwise, and the Company had no availability under its
Credit Facility or other sources of borrowings, the Company could have limited
ability to replace its oil and gas reserves or to maintain production at current
levels, resulting in a decrease in production and revenues over time. If the
Company's cash flow from operations and availability under the Credit Facility
are not sufficient to satisfy its capital expenditure requirements, there can be
no assurance that additional debt or equity financing will be available.
 
EFFECTS OF LEVERAGE
 
   
    At June 30, 1998, on a pro forma, consolidated basis, the Company and the
Subsidiary Guarantors would have had $153.8 million of indebtedness (including
current maturities of long-term indebtedness) compared to the Company's
stockholders' equity of $75.0 million. See "Use of Proceeds" and
"Capitalization." Although the Company's cash flow from operations has been
sufficient to meet its debt service obligations in the past, there can be no
assurance that the Company's operating results will continue to be sufficient
for the Company to meet its obligations. See "Unaudited Pro Forma Consolidated
Financial Statements," "Selected Consolidated Financial Data," "Capitalization"
and "Management's Discussion and Analysis of Financial Condition and Results of
Operations--Liquidity and Capital Resources."
    
 
    The degree to which the Company is leveraged could have important
consequences to the holders of the Notes, including the following: (i) the
Company's ability to obtain additional financing for acquisitions, capital
expenditures, working capital or general corporate purposes may be impaired in
the future; (ii) a substantial portion of the Company's cash flow from
operations must be dedicated to the payment of principal of and interest on the
Notes and the borrowings under the Credit Facility, thereby reducing funds
available to the Company for its operations and other purposes; (iii) certain of
the Company's borrowings are and will continue to be at variable rates of
interest, which expose the Company to the risk of increased interest rates; (iv)
indebtedness outstanding under the Credit Facility is senior in right of payment
of, is secured by substantially all of the Company's proved reserves and certain
other assets, and will mature prior to the Notes; and (v) the Company may be
substantially more leveraged than certain of its competitors, which may place it
at a relative competitive disadvantage and make it more vulnerable to changing
market conditions and regulations. See "Description of Credit Facility" and
"Description of Notes."
 
    The Company's ability to make scheduled payments or to refinance its
obligations with respect to its indebtedness will depend on its financial and
operating performance, which, in turn, is subject to the volatility of oil and
gas prices, production levels, prevailing economic conditions and to certain
financial, business and other factors beyond its control. If the Company's cash
flow and capital resources are insufficient to fund its debt service
obligations, the Company may be forced to sell assets, obtain additional debt or
equity financing or restructure its debt. Even if additional financing could be
obtained, there can be no assurance that it would be on terms that are favorable
or acceptable to the Company. There can be no assurance that the Company's cash
flow and capital resources will be sufficient to pay its indebtedness in the
future. In the absence of such operating results and resources, the Company
could face substantial liquidity problems and might be required to dispose of
material assets or operations to meet debt service and other obligations, and
there can be no assurance as to the timing of such sales or the adequacy of the
proceeds which the Company could realize therefrom. See "Management's Discussion
and Analysis of Financial Condition and Results of Operations--Liquidity and
Capital Resources" and "Description of Credit Facility."
 
RESTRICTIVE COVENANTS
 
    The Credit Facility and the Indenture include certain covenants that, among
other things, restrict: (i) the making of investments, loans and advances and
the paying of dividends and other restricted
 
                                       15
<PAGE>
payments; (ii) the incurrence of additional indebtedness; (iii) the granting of
liens, other than liens created pursuant to the Credit Facility and certain
permitted liens; (iv) mergers, consolidations and sales of all or a substantial
part of the Company's business or property; (v) the sale of assets; and (vi) the
making of capital expenditures. The Credit Facility requires the Company to
maintain certain financial ratios, including interest coverage and leverage
ratios. All of these restrictive covenants may restrict the Company's ability to
expand or pursue its business strategies. The ability of the Company to comply
with these and other provisions of the Credit Facility may be affected by
changes in economic or business conditions, results of operations or other
events beyond the Company's control. The breach of any of these covenants could
result in a default under the Credit Facility, in which case, depending on the
actions taken by the lenders thereunder or their successors or assignees, such
lenders could elect to declare all amounts borrowed under the Credit Facility,
together with accrued interest, to be due and payable, and the Company could be
prohibited from making payments with respect to the Notes until the default is
cured or all Senior Debt is paid or satisfied in full. If the Company were
unable to repay such borrowings, such lenders could proceed against their
collateral. If the indebtedness under the Credit Facility were to be
accelerated, there can be no assurance that the assets of the Company would be
sufficient to repay in full such indebtedness and the other indebtedness of the
Company, including the Notes. See "Description of Credit Facility" and
"Description of Notes--Ranking and Subordination."
 
OPERATING HAZARDS AND UNINSURED RISKS; PRODUCTION CURTAILMENTS
 
    Oil and gas drilling activities are subject to numerous risks, many of which
are beyond the Company's control, including the risk that no commercially
productive oil and gas reservoirs will be encountered. The cost of drilling,
completing and operating wells is often uncertain, and drilling operations may
be curtailed, delayed or canceled as a result of a variety of factors, including
unexpected drilling conditions, pressure irregularities in formations, equipment
failure or accidents, adverse weather conditions, title problems and shortages
or delays in the delivery of equipment. The Company's future drilling activities
may not be successful and, if unsuccessful, such failure will have an adverse
effect on future results of operations and financial condition.
 
    The Company's properties may be susceptible to hydrocarbon drainage from
production by other operators on adjacent properties. Industry operating risks
include the risk of fire, explosions, blow-outs, pipe failure, abnormally
pressured formations and environmental hazards such as oil spills, gas leaks,
ruptures or discharges of toxic gases, the occurrence of any of which could
result in substantial losses to the Company due to injury or loss of life,
severe damage to or destruction of property, natural resources and equipment,
pollution or other environmental damage, clean-up responsibilities, regulatory
investigation and penalties and suspension of operations. In accordance with
customary industry practice, the Company maintains insurance against the risks
described above. There can be no assurance that any insurance will be adequate
to cover losses or liabilities. The Company cannot predict the continued
availability of insurance, or its availability at premium levels that justify
its purchase.
 
GAS GATHERING AND MARKETING
 
    The Company's gas gathering and marketing operations depend in large part on
the ability of the Company to contract with third party producers to purchase
their gas, to obtain sufficient volumes of committed natural gas reserves, to
replace production from declining wells, to assess and respond to changing
market conditions in negotiating gas purchase and sale agreements and to obtain
satisfactory margins between the purchase price of its natural gas supply and
the sales price for such natural gas. In addition, the Company's operations are
subject to changes in regulations relating to gathering and marketing of oil and
gas. The inability of the Company to attract new sources of third party natural
gas or to promptly respond to changing market conditions or regulations in
connection with its gathering and marketing operations could have a material
adverse effect on the Company's financial condition and results of operations.
 
                                       16
<PAGE>
SUBORDINATION OF NOTES AND GUARANTEES
 
   
    The Notes are subordinated in right of payment to all existing and future
Senior Debt of the Company, including borrowings under the Credit Facility. In
the event of bankruptcy, liquidation or reorganization of the Company, the
assets of the Company will be available to pay obligations on the Notes only
after all Senior Debt has been paid in full, and there may not be sufficient
assets remaining to pay amounts due on any or all of the Notes outstanding. The
aggregate principal amount of Senior Debt of the Company, as of June 30, 1998,
on a pro forma basis, would have been $3.8 million exclusive of $75.0 million of
unused commitments under the Credit Facility. The Subsidiary Guarantees are
subordinated to Guarantor Senior Debt to the same extent and in the same manner
as the Notes are subordinated to Senior Debt. Additional Senior Debt may be
incurred by the Company or the Subsidiary Guarantors from time to time, subject
to certain restrictions. In addition to being subordinated to all existing and
future Senior Debt of the Company, the Notes will not be secured by any of the
Company's assets, unlike the borrowings under the Credit Facility. See
"Description of Notes--Ranking and Subordination."
    
 
   
POSSIBLE UNENFORCEABILITY OF SUBSIDIARY GUARANTEES; DEPENDENCE ON DISTRIBUTIONS
  BY SUBSIDIARIES
    
 
   
    Historically, the Company has derived approximately 10% of its operating
cash flows from its subsidiary, Continental Gas, Inc. The Company's other
subsidiary, Continental Crude Co., is recently formed and has not engaged in any
business activities. The holders of the Notes will have no direct claim against
such subsidiaries other than a claim created by one or more of the Subsidiary
Guarantees, which may themselves be subject to legal challenge in a bankruptcy
or reorganization case or a lawsuit by or on behalf of creditors of a Subsidiary
Guarantor. See "--Fraudulent Conveyance Considerations." If such a challenge
were upheld, such Subsidiary Guarantees would be invalid and unenforceable. To
the extent that any of such Subsidiary Guarantees are not enforceable, the
rights of the holders of the Notes to participate in any distribution of assets
of any Subsidiary Guarantor upon liquidation, bankruptcy, reorganization or
otherwise will, as is the case with other unsecured creditors of the Company, be
subject to prior claims of creditors of that Subsidiary Guarantor. The Company
relies in part upon distributions from its subsidiaries to generate the funds
necessary to meet its obligations, including the payment of principal of and
interest on the Notes. The Indenture contains covenants that restrict the
ability of the Company's subsidiaries to enter into any agreement limiting
distributions and transfers to the Company, including dividends. However, the
ability of the Company's subsidiaries to make distributions may be restricted by
among other things, applicable state corporate laws and other laws and
regulations or by terms of agreements to which they are or may become a party.
In addition, there can be no assurance that such distributions will be adequate
to fund the interest and principal payments on the Credit Facility and the Notes
when due. See "Description of Notes."
    
 
REPURCHASE OF NOTES UPON A CHANGE OF CONTROL AND CERTAIN OTHER EVENTS
 
    Upon a Change of Control, holders of the Notes may have the right to require
the Company to repurchase all Notes then outstanding at a purchase price equal
to 101% of the principal amount thereof, plus accrued interest to the date of
repurchase. In the event of certain asset dispositions, the Company will be
required under certain circumstances to use the Excess Cash (as defined herein)
to offer to repurchase the Notes at 100% of the principal amount thereof, plus
accrued interest to the date of repurchase (an "Excess Cash Offer"). See
"Description of Notes--Repurchase at the Option of Holders" and "--Certain
Covenants."
 
    The events that constitute a Change of Control or require an Excess Cash
Offer under the Indenture may also be events of default under the Credit
Facility or other Senior Debt of the Company and the Subsidiary Guarantors, the
terms of which may prohibit the purchase of the Notes by the Company until the
Company's indebtedness under the Credit Facility or other Senior Debt is paid in
full. In addition, such events may permit the lenders under such debt
instruments to accelerate the debt and, if the debt is not paid, to enforce
security interests on substantially all the assets of the Company and the
Subsidiary Guarantors, thereby limiting the Company's ability to raise cash to
repurchase the Notes and reducing the
 
                                       17
<PAGE>
practical benefit of the offer to repurchase provisions to the holders of the
Notes. See "Management's Discussion and Analysis of Financial Condition and
Results of Operations--Liquidity and Capital Resources." There can be no
assurance that the Company will have sufficient funds available at the time of
any Change of Control or Excess Cash Offer to make any debt payment (including
repurchases of Notes) as described above. Any failure by the Company to
repurchase Notes tendered pursuant to a Change of Control Offer (as defined
herein) or an Excess Cash Offer will constitute an Event of Default under the
Indenture. See "Description of Notes--Certain Covenants."
 
   
RISK OF HEDGING AND OIL TRADING ACTIVITIES
    
 
   
    From time to time the Company may use energy swap and forward sale
arrangements to reduce its sensitivity to oil and gas price volatility. If the
Company's reserves are not produced at the rates estimated by the Company due to
inaccuracies in the reserve estimation process, operational difficulties or
regulatory limitations, or otherwise, the Company would be required to satisfy
its obligations under potentially unfavorable terms. If the Company enters into
financial instrument contracts for the purpose of hedging prices and the
estimated production volumes are less than the amount covered by these
contracts, the Company would be required to mark-to-market these contracts and
recognize any and all losses within the determination period. Further, under
financial instrument contracts, the Company may be at risk for basis
differential, which is the difference in the quoted financial price for contract
settlement and the actual physical point of delivery price. The Company will
from time to time attempt to mitigate basis differential risk by entering into
physical basis swap contracts. Substantial variations between the assumptions
and estimates used by the Company in the hedging activities and actual results
experienced could materially adversely affect the Company's anticipated profit
margins and its ability to manage risk associated with fluctuations in oil and
gas prices. Furthermore, the fixed price sales and hedging contracts limit the
benefits the Company will realize if actual prices rise above the contract
prices. The Company had no energy swap or forward sale arrangements in place at
December 31, 1997 or at June 30, 1998. The Company plans to reduce its hedging
transactions. In August 1998, the Company began entering into oil trading
arrangements as part of its oil marketing activities. Under these arrangements,
the Company contracts to purchase oil from one source and to sell oil to an
unrelated purchaser, usually at disparate prices. Should the Company's purchaser
fail to complete the contracts for purchase, the Company may suffer a loss. The
Company's realized gains on these arrangements, determined before $.1 million of
transportation costs and related expenses, of $1.6 million for July, $1.2
million for August and $.8 million for September 1998. The Company's policy is
to limit its exposure from open positions to $1.0 million at any one time.
    
 
WRITEDOWN OF CARRYING VALUES
 
    The Company periodically reviews the carrying value of its oil and gas
properties in accordance with Statement of Financial Accounting Standards No.
121 "Accounting for the Impairment of Long-Lived Assets and Long-Lived Assets to
be Disposed Of" ("SFAS No. 121"). SFAS No. 121 requires that long-lived assets,
including proved oil and gas properties, and certain identifiable intangibles to
be held and used by the Company be reviewed for impairment whenever events or
changes in circumstances indicate that the carrying amount of an asset may not
be recoverable. In performing the review for recoverability, the Company
estimates the future cash flows expected to result from the use of the asset and
its eventual disposition. If the sum of the expected future cash flows
(undiscounted and without interest charges) is less than the carrying value of
the asset, an impairment loss is recognized in the form of additional
depreciation, depletion and amortization expense. Measurement of an impairment
loss for proved oil and gas properties is calculated on a property-by-property
basis as the excess of the net book value of the property over the projected
discounted future net cash flows of the impaired property, considering expected
reserve additions and price and cost escalations. The Company may be required to
write down the carrying value of its oil and gas properties when oil and gas
prices are depressed or unusually volatile, which would result in a charge to
earnings. Once incurred, a writedown of oil and gas properties is not reversible
at a later date.
 
                                       18
<PAGE>
LAWS AND REGULATIONS; ENVIRONMENTAL RISK
 
    Oil and gas operations are subject to various federal, state and local
governmental regulations which may be changed from time to time in response to
economic or political conditions. From time to time, regulatory agencies have
imposed price controls and limitations on production in order to conserve
supplies of oil and gas. In addition, the production, handling, storage,
transportation and disposal of oil and gas, by-products thereof and other
substances and materials produced or used in connection with oil and gas
operations are subject to regulation under federal, state and local laws and
regulations. See "Business and Properties--Regulation."
 
    The Company is subject to a variety of federal, state and local governmental
regulations related to the storage, use, discharge and disposal of toxic,
volatile or otherwise hazardous materials. These regulations subject the Company
to increased operating costs and potential liability associated with the use and
disposal of hazardous materials. Although these laws and regulations have not
had a material adverse effect on the Company's financial condition or results of
operations, there can be no assurance that the Company will not be required to
make material expenditures in the future. If such laws and regulations become
increasingly stringent in the future, it could lead to additional material costs
for environmental compliance and remediation by the Company. See "Business and
Properties--Regulation."
 
    The Company's twenty years of experience with the use of HPAI technology has
not resulted in any known environmental claims. The Company's saltwater
injection operations will pose certain risks of environmental liability to the
Company. Although the Company will monitor the injection process, any leakage
from the subsurface portions of the wells could cause degradation of fresh
groundwater resources, potentially resulting in suspension of operation of the
wells, fines and penalties from governmental agencies, expenditures for
remediation of the affected resource, and liability to third parties for
property damages and personal injuries. In addition, the sale by the Company of
residual crude oil collected as part of the saltwater injection process could
impose liability on the Company in the event the entity to which the oil was
transferred fails to manage the material in accordance with applicable
environmental health and safety laws.
 
    Any failure by the Company to obtain required permits for, control the use
of, or adequately restrict the discharge of, hazardous substances under present
or future regulations could subject the Company to substantial liability or
could cause its operations to be suspended. Such liability or suspension of
operations could have a material adverse effect on the Company's business,
financial condition and results of operations.
 
COMPETITION
 
    The Company operates in a highly competitive environment. The Company
competes with major and independent oil and gas companies and with individual
producers and developers for the acquisition of desirable oil and gas
properties, as well as for the equipment and labor required to develop and
operate such properties. Many of these competitors have financial and other
resources substantially greater than those of the Company. See "Business and
Properties--Competition."
 
CONTROLLING SHAREHOLDER
 
   
    At August 31, 1998, Harold Hamm, President and Chief Executive Officer and a
Director of the Company, beneficially owned 44,496 shares of Common Stock
representing, in the aggregate, approximately 91% of the outstanding Common
Stock of the Company. As a result, Harold Hamm is in a position to control the
Company. The Company is provided oilfield services by several affiliated
companies controlled by Harold Hamm. Such transactions will continue in the
future and may result in conflicts of interest between the Company and such
affiliated companies. There can be no assurance that such conflicts will be
resolved in favor of the Company. If Harold Hamm ceases to be an executive
officer of the Company, such would constitute an event of default under the
Credit Facility, unless waived by the
    
 
                                       19
<PAGE>
requisite percentage of banks. See "Principal Shareholders," "Certain
Relationships and Related Transactions" and "Description of Credit Facility."
 
ABSENCE OF PUBLIC MARKET; RESTRICTIONS ON TRANSFER
 
    The Notes are a new issue of securities for which there has been no public
market and there can be no assurance that such a market for the Notes will
develop or, if such a market develops, as to the liquidity of such market. The
Company does not intend to apply for listing of the Notes on any securities
exchange; however, the Notes have been designated for trading in the PORTAL
market. If the Notes are traded after their initial issuance, they may trade at
a discount from their initial offering price, depending upon prevailing interest
rates, the market for similar securities, the performance of the Company and
certain other factors. Although the Initial Purchaser has informed the Company
that it intends to make a market in the Notes as permitted by applicable laws
and regulations the Initial Purchaser is not obligated to do so and any such
market making activities may be discontinued at any time without notice. See
"Transfer Restrictions," "Exchange and Registration Rights Agreement" and "Plan
of Distribution."
 
FRAUDULENT CONVEYANCE CONSIDERATIONS
 
    The incurrence of indebtedness (such as the Notes) is subject to review
under relevant federal bankruptcy and state fraudulent conveyance statutes in a
bankruptcy or reorganization proceeding or a lawsuit by or on behalf of
creditors of the Company. The Company's obligations under the Notes will be
guaranteed on a subordinated, unsecured basis by existing and future Restricted
Subsidiaries pursuant to the provisions of the Indenture. Under such laws, to
the extent a court were to find that (a) the Notes or a Subsidiary Guarantee was
incurred with the intent to hinder, delay or defraud any present or future
creditor or that the Company or such Subsidiary Guarantor contemplated
insolvency with a design to favor one or more creditors to the exclusion in
whole or in part of other creditors or (b) at the time such person incurred
obligations under the Notes or a Subsidiary Guarantee, it received less than
fair consideration or reasonably equivalent value therefor, and (c) either (i)
was insolvent, (ii) was rendered insolvent by such guarantee or pledge, (iii)
was engaged in a business or transaction for which its remaining unencumbered
assets constituted unreasonably small capital or (iv) intended to incur or
believed that it would incur debts beyond its ability to pay such debts as they
matured, such court could void such obligations and direct the return of any
amounts paid with respect thereto. The measure of insolvency for purposes of the
foregoing will vary depending on the law of the jurisdiction being applied.
Generally, however, an entity would be considered insolvent if the sum of its
debts (including contingent or unliquidated debts) is greater than all of its
property at a fair valuation or if the present fair salable value of its assets
is less than the amount that would be required to pay its probable liability on
its existing debts as they become absolute and mature. There can be no assurance
that, after providing for all prior claims, if any, there would be sufficient
assets to satisfy the claims of the holders of the Notes relating to any voided
portion of a Subsidiary Guarantee. To the extent a Subsidiary Guarantee is
voided as a fraudulent conveyance or held unenforceable for any other reason,
the holders of the Notes would cease to have any claim in respect of such
Subsidiary Guarantor and would be creditors solely of the Company and any other
Subsidiary Guarantors.
 
   
CONSEQUENCES OF THE EXCHANGE OFFER ON NON-TENDERING HOLDERS OF OLD NOTES.
    
 
   
    In the event the Exchange Offer is consummated, the Company and the
Subsidiary Guarantors will not be required to register any Old Notes not
tendered and accepted in the Exchange Offer (other than, in certain
circumstances, Notes entitled to be covered by a shelf registration statement).
In such event, holders of Old Notes seeking liquidity in their investment would
have to rely on exemptions to the registration requirements under the securities
laws, including the Securities Act. Following the Exchange Offer, assuming the
Company and the Subsidiary Guarantors have no shelf registration obligation with
respect to any Notes, none of the holders of Notes will be entitled to receive
liquidated damages. See "The Exchange Offer--Purpose and Effect of The Exchange
Offer."
    
 
                                       20
<PAGE>
                               THE EXCHANGE OFFER
 
PURPOSE AND EFFECT OF THE EXCHANGE OFFER
 
    The Old Notes were sold by the Company on July 24, 1998 to Chase Securities,
Inc. (the "Initial Purchaser") in reliance on Section 4(2) of the Securities
Act. The Placement Agents offered and sold the Old Notes only (i) to "qualified
institutional buyers" (as defined in Rule 144A) in compliance with Rule 144A and
(ii) outside the United States to persons other than U.S. Persons, which term
includes dealers or other professional fiduciaries in the United States acting
on a discretionary basis for foreign beneficial owners (other than an estate or
trust), in reliance upon Regulation S under the Securities Act.
 
    In connection with the sale of the Old Notes, the Company and the Initial
Purchaser entered into a Registration Rights Agreement dated as of July 21, 1998
(the "Registration Rights Agreement"), which requires the Company (i) to cause
the Old Notes to be registered under the Securities Act, or (ii) to file with
the Commission a registration statement under the Securities Act with respect to
an issue of New Notes of the Company identical in all material respects to the
Old Notes and use its best efforts to cause such registration statement to
become effective under the Securities Act and, upon the effectiveness of that
registration statement, to offer to the holders of the Old Notes the opportunity
to exchange their Old Notes for a like principal amount of New Notes, which will
be issued without a restrictive legend and which may be reoffered and resold by
the holder without restrictions or limitations under the Securities Act. A copy
of the Registration Rights Agreement has been filed as an exhibit to the
Registration Statement of which this Prospectus is a part. The Exchange Offer is
being made pursuant to the Registration Rights Agreement to satisfy the
Company's obligations thereunder. The term "holder" with respect to the Exchange
Offer means any person in whose name Old Notes are registered on the Company's
books or any other person who has obtained a properly completed stock power from
the registered holder, or any person whose Old Notes are held of record by The
Depository Trust Company ("DTC") who desires to deliver such Old Notes by
book-entry transfer at DTC.
 
   
    The Company has not requested, and does not intend to request, an
interpretation by the staff of the Commission with respect to whether the New
Notes issued pursuant to the Exchange Offer in exchange for the Old Notes may be
offered for sale, resold or otherwise transferred by any holder without
compliance with the registration and prospectus delivery provisions of the
Securities Act. Based on interpretations by the staff of the Commission set
forth in no-action letters issued regarding EXXON CAPITAL HOLDINGS CORPORATION
(available May 13, 1989) and MORGAN STANLEY & CO. INCORPORATED (available June
5, 1991), the Company believes the New Notes issued pursuant to the Exchange
Offer in exchange for Old Notes may be offered for resale, resold and otherwise
transferred by any holder thereof (other than broker-dealers, as set forth
below, and any such holder that is an "affiliate" of the Company within the
meaning of Rule 405 under the Securities Act) without compliance with the
registration and prospectus delivery provisions of the Securities Act, provided
that such New Notes are acquired in the ordinary course of such holder's
business and that such holder has no arrangement or understanding with any
person to participate in the distribution of such New Notes. Any holder who
tenders in the Exchange Offer with the intention to participate, or for the
purpose of participating, in a distribution of the New Notes or who is an
affiliate of the Company may not rely upon such interpretations by the staff of
the Commission and, in the absence of an exemption therefrom, must comply with
the registration and prospectus delivery requirements of the Securities Act in
connection with any secondary resale transaction. Failure to comply with such
requirements in such instance may result in such holder incurring liabilities
under the Securities Act for which the holder is not indemnified by the Company.
Each broker-dealer (other than an affiliate of the Company) that receives New
Notes for its own account pursuant to the Exchange Offer must acknowledge that
it will deliver a prospectus meeting the requirements of the Securities Act in
connection with any resale of such New Notes. The Letter of Transmittal states
that by so acknowledging and by delivering a prospectus, a broker-dealer will
not be deemed to admit that it is an "underwriter" within the meaning of the
Securities Act. The Company has agreed that, for a period of 180 days after the
Exchange Date, it will make the
    
 
                                       21
<PAGE>
Prospectus available to any broker-dealer for use in connection with any such
resale. See "Plan of Distribution."
 
    The Exchange Offer is not being made to, nor will the Company accept
surrenders for exchange from, holders of Old Notes in any jurisdiction in which
this Exchange Offer or the acceptance thereof would not be in compliance with
the securities or blue sky laws of such jurisdiction.
 
    By tendering in the Exchange Offer, each holder of Old Notes will represent
to the Company that, among other things, (i) the New Notes acquired pursuant to
the Exchange Offer are being obtained in the ordinary course of business of the
person receiving such New Notes, whether or not such person is the holder, (ii)
neither the holder of Old Notes nor any such other person has an arrangement or
understanding with any person to participate in the distribution of such New
Notes, (iii) if the holder is not a broker-dealer, or is a broker-dealer but
will not receive New Notes for its own account in exchange for Old Notes,
neither the holder nor any such other person is engaged in or intends to
participate in the distribution of such New Notes, and (iv) neither the holder
nor any such other person is an "affiliate" of the Company within the meaning of
Rule 405 under the Securities Act or, if such holder is an "affiliate," that
such holder will comply with the registration and prospectus delivery
requirements of the Securities Act to the extent applicable.
 
   
    Each holder, by tendering, also acknowledges and agrees that any holder
using the Exchange Offer to participate in a distribution of the New Notes (a)
could not rely on the position of the Commission enunciated in EXXON CAPITAL
HOLDINGS CORPORATION (available May 13, 1998) and MORGAN STANLEY AND CO., INC.
(available June 5, 1991) as interpreted in the Commission's letter to SHERMAN &
STERLING (available July 2, 1993), and similar no-action letters, and (b) must
comply with the registration and prospectus delivery requirements of the
Securities Act in connection with a secondary resale transaction and that such a
secondary resale transaction should be covered by an effective registration
statement containing the selling security holder information required by Item
507 or 508, as applicable, of Regulation S-K if the resales are of New Notes
obtained by such holder in exchange for Old Notes acquired by such holder
directly from the company.
    
 
    Following the completion of the Exchange Offer, none of the Old Notes will
be entitled to the contingent increase in interest rate applicable to the Old
Notes. Following the consummation of the Exchange Offer, holders of Old Notes
will not have any further registration rights, and the Old Notes will continue
to be subject to certain restrictions on transfer. See "--Consequences of
Failure to Exchange." Accordingly, the liquidity of the market for the Old Notes
could be adversely affected. See "Risk Factors-- Consequences of the Exchange
Offer on Non-Tendering Holders of the Old Notes."
 
    Participation in the Exchange Offer is voluntary and holders should
carefully consider whether to accept. Holders of the Old Notes are urged to
consult their financial and tax advisors in making their own decisions on
whether to participate in the Exchange Offer.
 
TERMS OF THE EXCHANGE OFFER
 
    GENERAL.  Upon the terms and subject to the conditions set forth in this
Prospectus and in the Letter of Transmittal, the Company will accept any and all
Old Notes validly tendered and not withdrawn prior to 5:00 p.m., New York City
time, on the Expiration Date. The Company will issue $1,000 principal amount of
New Notes in exchange for each $1,000 principal amount of Old Notes accepted in
the Exchange Offer. Holders may tender some or all of their Old Notes pursuant
to the Exchange Offer. However, Old Notes may be tendered only in amounts that
are integral multiples of $1,000 principal amount.
 
    The form and terms of the New Notes will be identical in all material
respects to the form and terms of the Old Notes except that the New Notes will
be registered under the Securities Act and, therefore, certificates representing
New Notes will not bear legends restricting the transfer thereof. The New Notes
will evidence the same debt as the Old Notes, will be entitled to the benefits
of the Indenture and will be
 
                                       22
<PAGE>
treated as a single class thereunder with any Old Notes that remain outstanding.
The Exchange Offer is not conditioned upon any minimum number of Old Notes being
tendered for exchange.
 
   
    As of October 16, 1998, $150,000,000 aggregate principal amount of the Old
Notes were outstanding. This Prospectus, together with the Letter of
Transmittal, is being sent to all registered holders.
    
 
    Holders of Old Notes do not have any appraisal or dissenters' rights under
the Oklahoma General Corporation Act or the Indenture in connection with the
Exchange Offer. The Company intends to conduct the Exchange Offer in accordance
with the provisions of the Registration Rights Agreement and the applicable
requirements of the Exchange Act, and the rules and regulations of the
Commission thereunder. Old Notes which are not tendered for exchange in the
Exchange Offer will remain outstanding and interest thereon will continue to
accrue, but such Old Notes will not be entitled to any rights or benefits under
the Registration Rights Agreement.
 
    The Company will be deemed to have accepted validly tendered Old Notes when,
as and if the Company has given oral or written notice thereof to the Exchange
Agent. The Exchange Agent will act as agent for the tendering holders for the
purposes of receiving the New Notes from the Company. If any tendered Old Notes
are not accepted for exchange because of an invalid tender, the occurrence of
certain other events set forth herein or otherwise, certificates for any such
unaccepted Old Notes will be returned, without expense, to the tendering holder
thereof as promptly as practicable after the Expiration Date.
 
    Holders who tender Old Notes in the Exchange Offer will not be required to
pay brokerage commissions or fees or, subject to the instructions in the Letter
of Transmittal, transfer taxes with respect to the exchange of Old Notes
pursuant to the Exchange Offer. The Company will pay all charges and expenses,
other than certain applicable taxes described below, in connection with the
Exchange Offer. See "--Fees and Expenses."
 
   
    EXPIRATION DATE; EXTENSIONS; AMENDMENTS.  The term "Expiration Date" shall
mean 5:00 p.m., New York City time, on November   , 1998, unless the Company, in
its sole discretion, extends the Exchange Offer, in which case the term
"Expiration Date" shall mean the latest date and time to which the Exchange
Offer is extended. Although the Company has no current intention to extend the
Exchange Offer, the Company reserves the right to extend the Exchange Offer at
any time and from time to time by giving oral or written notice to the Exchange
Agent and by timely public announcement communicated, unless otherwise required
by applicable law or regulation, by making a release to the Dow Jones News
Service. During any extension of the Exchange Offer, all Old Notes previously
tendered pursuant to the Exchange Offer and not withdrawn will remain subject to
the Exchange Offer. The date of the exchange of the New Notes for Old Notes will
be as soon as practicable following the Expiration Date.
    
 
    The Company reserves the right, in its sole discretion, (i) to delay
accepting any Old Notes, to extend the Exchange Offer or to terminate the
Exchange Offer if any of the conditions set forth below under "--Conditions of
the Exchange Offer" shall not have been satisfied, by giving oral or written
notice of such delay, extension or termination to the Exchange Agent, or (ii) to
amend the terms of the Exchange Offer in any manner. Any such delay in
acceptance, extension, termination or amendment will be followed as promptly as
practicable by oral or written notice thereof to the registered holders. If the
Exchange Offer is amended in any manner determined by the Company to constitute
a material change, the Company will promptly disclose such amendment by means of
a prospectus supplement that will be distributed to the registered holders, and
the Company will extend the Exchange Offer for a period of time, depending upon
the significance of the amendment and the manner of disclosure to the registered
holders, if the Exchange Offer would otherwise expire during such period.
 
    In all cases, issuance of the New Notes for Old Notes that are accepted for
exchange pursuant to the Exchange Offer will be made only after timely receipt
by the Exchange Agent of a properly completed and duly executed Letter of
Transmittal and all other required documents; provided, however, that the
Company reserves the absolute right to waive any conditions of the Exchange
Offer or defects or
 
                                       23
<PAGE>
irregularities in the tender of Old Notes. If any tendered Old Notes are not
accepted for any reason set forth in the terms and conditions of the Exchange
Offer or if Old Notes are submitted for a greater principal amount than the
holder desires to exchange, such unaccepted or non-exchanged Old Notes or
substitute Old Notes evidencing the unaccepted portion, as appropriate, will be
returned without expense to the tendering holder, unless otherwise provided in
the Letter of Transmittal, as promptly as practicable after the expiration or
termination of the Exchange Offer.
 
    INTEREST ON THE NEW NOTES.  Holders of Old Notes that are accepted for
exchange will not receive accrued interest thereon at the time of exchange.
However, each New Note will bear interest from the most recent date to which
interest has been paid on the Old Notes or New Notes, or if no interest has been
paid on the Old Notes or the New Notes, from June 12, 1998.
 
    PROCEDURES FOR TENDERING OLD NOTES.  The tender to the Company of Old Notes
by a holder thereof pursuant to one of the procedures set forth below will
constitute an agreement between such holder and the Company in accordance with
the terms and subject to the conditions set forth herein and in the Letter of
Transmittal. A holder of the Old Notes may tender such Old Notes by (i) properly
completing and signing a Letter of Transmittal or a facsimile thereof (all
references in this Prospectus to a Letter of Transmittal shall be deemed to
include a facsimile thereof) and delivering the same, together with any
corresponding certificate or certificates representing the Old Notes being
tendered (if in certificated form) and any required signature guarantees, to the
Exchange Agent at its address set forth in the Letter of Transmittal on or prior
to the Expiration Date (or complying with the procedure for book-entry transfer
described below), or (ii) complying with the guaranteed delivery procedures
described below.
 
    If tendered Old Notes are registered in the name of the signer of the Letter
of Transmittal and the New Notes to be issued in exchange therefor are to be
issued (and any untendered Old Notes are to be reissued) in the name of the
registered holder (which term, for the purposes described herein, shall include
any participant in DTC (also referred to as a book-entry facility) whose name
appears on a security listing as the owner of Old Notes), the signature of such
signer need not be guaranteed. In any other case, the tendered Old Notes must be
endorsed or accompanied by written instruments of transfer in form satisfactory
to the Company and duly executed by the registered holder and the signature on
the endorsement or instrument of transfer must be guaranteed by an eligible
guarantor institution which is a member of one of the following recognized
signature guarantee programs (an "Eligible Institution"): (i) The Securities
Transfer Agents Medallion Program (STAMP), (ii) The New York Stock Exchange
Medallion Signature Program (MSF), or (iii) The Stock Exchange Medallion Program
(SEMP). If the New Notes or Old Notes not exchanged are to be delivered to an
address other than that of the registered holder appearing on the note register
for the Old Notes, the signature in the Letter of Transmittal must be guaranteed
by an Eligible Institution.
 
    THE METHOD OF DELIVERY OF OLD NOTES, THE LETTER OF TRANSMITTAL AND ALL OTHER
REQUIRED DOCUMENTS TO THE EXCHANGE AGENT IS AT THE ELECTION AND RISK OF THE
HOLDER. IF SUCH DELIVERY IS BY MAIL, IT IS RECOMMENDED THAT REGISTERED MAIL,
PROPERLY INSURED, WITH RETURN RECEIPT REQUESTED, BE USED. IN ALL CASES,
SUFFICIENT TIME SHOULD BE ALLOWED TO ASSURE DELIVERY TO THE EXCHANGE AGENT
BEFORE THE EXPIRATION DATE. NO LETTER OF TRANSMITTAL OR OLD NOTES SHOULD BE SENT
TO THE COMPANY. HOLDERS MAY REQUEST THEIR RESPECTIVE BROKERS, DEALERS,
COMMERCIAL BANKS, TRUST COMPANIES OR NOMINEES TO EFFECT THE ABOVE TRANSACTIONS
FOR SUCH HOLDERS.
 
    The Company understands that the Exchange Agent has confirmed with DTC that
any financial institution that is a participant in DTC's system may utilize
DTC's Automated Tender Offer Program ("ATOP") to tender Old Notes. The Company
further understands that the Exchange Agent will request, within two business
days after the date the Exchange Offer commences, that DTC establish an account
with respect to the Old Notes for the purpose of facilitating the Exchange
Offer, and any participant may
 
                                       24
<PAGE>
make book-entry delivery of Old Notes by causing DTC to transfer such Old Notes
into the Exchange Agent's account in accordance with DTC's ATOP procedures for
transfer. However, the exchange of the Old Notes so tendered will only be made
after timely confirmation (a "Book-Entry Confirmation") of such book-entry
transfer and timely receipt by the Exchange Agent of an Agent's Message (as
defined in the next sentence), and any other documents required by the Letter of
Transmittal. The term "Agent's Message" means a message, transmitted by DTC and
received by the Exchange Agent and forming part of Book-Entry Confirmation,
which states that DTC has received an express acknowledgment from a participant
tendering Old Notes which are the subject of such Book-Entry Confirmation and
that such participant has received and agrees to be bound by the terms of the
Letter of Transmittal and that the Company may enforce such agreement against
such participant.
 
    A tender will be deemed to have been received as of the date when (i) the
tendering holder's properly completed and duly signed Letter of Transmittal
accompanied by the Old Notes (or a confirmation of book-entry transfer of such
Old Notes into the Exchange Agent's account at DTC), is received by the Exchange
Agent, or (ii) a Notice of Guaranteed Delivery or letter, telegram or facsimile
transmission to similar effect (as provided below) from an Eligible Institution
is received by the Exchange Agent. Issuances of New Notes in exchange for Old
Notes tendered pursuant to a Notice of Guaranteed Delivery or letter, telegram
or facsimile transmission to similar effect (as provided below) by an Eligible
Institution will be made only against submission of a duly signed Letter of
Transmittal (and any other required documents) and deposit of the tendered Old
Notes.
 
    All questions as to the validity, form, eligibility (including time of
receipt) and acceptance for exchange of any tender of Old Notes will be
determined by the Company, whose determination will be final and binding. The
Company reserves the absolute right to reject any or all tenders not in proper
form or the acceptance for exchange of which may, in the opinion of the
Company's counsel, be unlawful. The Company also reserves the absolute right to
waive any of the conditions of the Exchange Offer or any defect or irregularity
in the tender of any Old Notes. None of the Company, the Exchange Agent or any
other person will be under any duty to give notification of any defects or
irregularities in tenders or incur any liability for failure to give any such
notification. Any Old Notes received by the Exchange Agent that are not validly
tendered and as to which the defects or irregularities have not been cured or
waived, or if Old Notes are submitted in principal amount greater than the
principal amount of Old Notes being tendered by such tendering holder, such
unaccepted or non-exchanged Old Notes will be returned by the Exchange Agent to
the tendering holder, unless otherwise provided in the Letter of Transmittal, as
soon as practicable following the Expiration Date.
 
    In addition, the Company reserves the right in its sole discretion (a) to
purchase or make offers for any Old Notes that remain outstanding subsequent to
the Expiration Date, and (b) to the extent permitted by applicable law, to
purchase Old Notes in the open market, in privately negotiated transactions or
otherwise. The terms of any such purchases or offers will differ from the terms
of the Exchange Offer.
 
    GUARANTEED DELIVERY PROCEDURES.  If the holder desires to accept the
Exchange Offer and time will not permit a Letter of Transmittal or Old Notes to
reach the Exchange Agent before the Expiration Date or the procedure for
book-entry transfer cannot be completed on a timely basis, a tender may be
effected if the Exchange Agent has received at its office, on or prior to the
Expiration Date, a letter, telegram or facsimile transmission from an Eligible
Institution setting forth the name and address of the tendering holder, the
name(s) in which the Old Notes are registered and the certificate number(s) of
the Old Notes to be tendered, and stating that the tender is being made thereby
and guaranteeing that, within three New York Stock Exchange trading days after
the date of execution of such letter, telegram or facsimile transmission by the
Eligible Institution, such Old Notes, in proper form for transfer (or a
confirmation of book-entry transfer of such Old Notes into the Exchange Agent's
account at DTC), will be delivered by such Eligible Institution together with a
properly completed and duly executed Letter of Transmittal (and any other
required documents). Unless Old Notes being tendered by the above-described
method are deposited with the Exchange Agent within the time period set forth
above (accompanied or preceded by a
 
                                       25
<PAGE>
properly competed Letter of Transmittal and any other required documents), the
Company may, at its option, reject the tender. Copies of a Notice of Guaranteed
Delivery which may be used by Eligible Institutions for the purposes described
in this paragraph are available from the Exchange Agent.
 
    TERMS AND CONDITIONS OF THE LETTER OF TRANSMITTAL.  The Letter of
Transmittal contains, among other things, the following terms and conditions,
which are part of the Exchange Offer.
 
    The party tendering Old Notes for exchange (the "Transferor") exchanges,
assigns and transfers the Old Notes to the Company and irrevocably constitutes
and appoints the Exchange Agent as the Transferor's agent and attorney-in-fact
to cause the Old Notes to be assigned, transferred and exchanged. The Transferor
represents and warrants that it has full power and authority to tender,
exchange, assign and transfer the Old Notes and to acquire New Notes issuable
upon the exchange of such tendered Old Notes, and that, when the same are
accepted for exchange, the Company will acquire good and unencumbered title to
the tendered Old Notes, free and clear of all liens, restrictions, charges and
encumbrances and not subject to any adverse claim. The Transferor also warrants
that it will, upon request, execute and deliver any additional documents deemed
by the Company to be necessary or desirable to complete the exchange, assignment
and transfer of tendered Old Notes or to transfer ownership of such Old Notes on
the account books maintained by DTC. All authority conferred by the Transferor
will survive the death, bankruptcy or incapacity of the Transferor and every
obligation of the Transferor shall be binding upon the heirs, personal
representatives, executors, administrators, successors, assigns, trustees in
bankruptcy and other legal representatives of such Transferor.
 
    By executing a Letter of Transmittal, each holder will make to the Company
the representations set forth above under the heading "--Purpose and Effect of
the Exchange Offer."
 
    WITHDRAWAL OF TENDERS OF OLD NOTES.  Except as otherwise provided herein,
tenders of Old Notes may be withdrawn at any time prior to 5:00 p.m., New York
City time, on the Expiration Date.
 
    To withdraw a tender of Old Notes in the Exchange Offer, a written or
facsimile transmission notice of withdrawal must be received by the Exchange
Agent at its address set forth herein prior to 5:00 p.m., New York City time, on
the Expiration Date. Any such notice of withdrawal must (i) specify the name of
the person having deposited the Old Notes to be withdrawn (the "Depositor"),
(ii) identify the Old Notes to be withdrawn (including the certificate number or
numbers and principal amount of such Old Notes), (iii) contain a statement that
such holder is withdrawing its election to have such Old Notes exchanged, (iv)
be signed by the holder in the same manner as the original signature on the
Letter of Transmittal by which such Old Notes were tendered (including any
required signature guarantees) or be accompanied by documents of transfer
sufficient to have the Trustee with respect to the Old Notes register the
transfer of such Old Notes in the name of the person withdrawing the tender, and
(v) specify the name in which any such Old Notes are to be registered, if
different from that of the Depositor. If Old Notes have been tendered pursuant
to the procedure for book-entry transfer, any notice of withdrawal must specify
the name and number of the account at the book-entry transfer facility. All
questions as to the validity, form and eligibility (including time of receipt)
of such notices will be determined by the Company, whose determination shall be
final and binding on all parties. Any Old Notes so withdrawn will be deemed not
to have been validly tendered for purposes of the Exchange Offer and no New
Notes will be issued with respect thereto unless the Old Notes so withdrawn are
validly retendered. Any Old Notes which have been tendered but which are not
accepted for exchange will be returned to the holder thereof without cost to
such holder as soon as practicable after withdrawal, rejection of tender or
termination of the Exchange Offer. Properly withdrawn Old Notes may be
retendered by following one of the procedures described above under
"--Procedures for Tendering Old Notes" at any time prior to the Expiration Date.
 
                                       26
<PAGE>
CONDITIONS OF THE EXCHANGE OFFER
 
    Notwithstanding any other term of the Exchange Offer, or any extension of
the Exchange Offer, the Company shall not be required to accept for exchange, or
exchange New Notes for, any Old Notes, and may terminate the Exchange Offer as
provided herein before the acceptance of such Old Notes, if:
 
        (a) any statute, rule or regulation shall have been enacted, or any
    action shall have been taken by any court or governmental authority which,
    in the reasonable judgment of the Company, would prohibit, restrict or
    otherwise render illegal consummation of the Exchange Offer; or
 
        (b) any change, or any development involving a prospective change, in
    the business or financial affairs of the Company or any of its subsidiaries
    has occurred which, in the sole judgment of the Company, might materially
    impair the ability of the Company to proceed with the Exchange Offer or
    materially impair the contemplated benefits of the Exchange Offer to the
    Company; or
 
        (c) there shall occur a change in the current interpretations by the
    staff of the Commission which, in the Company's reasonable judgment, might
    materially impair the Company's ability to proceed with the Exchange Offer.
 
    If the Company determines in its sole discretion that any of the above
conditions are not satisfied, the Company may (i) refuse to accept any Old Notes
and return all tendered Old Notes to the tendering holders, (ii) extend the
Exchange Offer and retain all Old Notes tendered prior to the Expiration Date,
subject, however, to the right of holders to withdraw such Old Notes (see
"--Terms of the Exchange Offer--Withdrawal of Tenders of Old Notes"), or (iii)
waive such unsatisfied conditions with respect to the Exchange Offer and accept
all validly tendered Old Notes which have not been withdrawn. If such waiver
constitutes a material change to the Exchange Offer, the Company will promptly
disclose such waiver by means of a prospectus supplement that will be
distributed to the registered holders, and the Company will extend the Exchange
Offer for a period of time, depending upon the significance of the waiver and
the manner of disclosure to the registered holders, if the Exchange Offer would
otherwise expire during such period.
 
EXCHANGE AGENT
 
    United States Trust Company of New York has been appointed as Exchange Agent
for the Exchange Offer. Questions and requests for assistance, requests for
additional copies of this Prospectus or of the Letter of Transmittal and
requests for Notices of Guaranteed Delivery should be directed to the Exchange
Agent addressed as follows:
 
<TABLE>
<S>                            <C>                            <C>
          By Mail:             By Overnight Courier:          By Hand:
United States Trust Company    United States Trust Company    United States Trust Company
  of New York                  of New York                    of New York
P. O. Box 844                  Corporate Trust Operations     111 Broadway
Cooper Station                 Department                     Lower Level
New York, NY 10276-0844        770 Broadway - 13th Floor      New York, NY 10006
Attn: Corporate Trust          New York, NY 10003             Attn: Corporate Trust
Services                                                      Services
(registered or certified mail
recommended)
 
                                       By Facsimile:
                                      (212) 420-6152
                             (For Eligible Institutions Only)
                                   Confirm by Telephone:
                                      (800) 548-6565
</TABLE>
 
                                       27
<PAGE>
FEES AND EXPENSES
 
    The expenses of soliciting tenders will be borne by the Company. The
principal solicitation is being made by mail; however, additional solicitation
may be made by telecopy, telephone or in person by officers and regular
employees of the Company and its affiliates. No additional compensation will be
paid to any such officers and employees who engage in soliciting tenders.
 
    The Company has not retained any dealer-manager or other soliciting agent in
connection with the Exchange Offer and will not make any payments to brokers,
dealers or others soliciting acceptance of the Exchange Offer. The Company,
however, will pay the Exchange Agent reasonable and customary fees for its
services and will reimburse it for its reasonable out-of-pocket expenses in
connection therewith. The Company may also pay brokerage houses and other
custodians, nominees and fiduciaries the reasonable out-of-pocket expenses
incurred by them in forwarding copies of this Prospectus, the Letter of
Transmittal and related documents to the beneficial owners of the Old Notes and
in handling or forwarding tenders for exchange.
 
    The expenses to be incurred in connection with the Exchange Offer will be
paid by the Company. Such expenses include fees and expenses of the Exchange
Agent and transfer agent and registrar, accounting and legal fees and printing
costs, among others.
 
    The Company will pay all transfer taxes, if any, applicable to the exchange
of the Old Notes pursuant to the Exchange Offer. If, however, New Notes, or Old
Notes for principal amounts not tendered or accepted for exchange, are to be
delivered to, or are to be issued in the name of, any person other than the
registered holder of the Old Notes tendered or if a transfer tax is imposed for
any reason other than the exchange of the Old Notes pursuant to the Exchange
Offer, then the amount of any such transfer taxes (whether imposed on the
registered holder or any other persons) will be payable by the tendering holder.
If satisfactory evidence of payment of such taxes or exemption therefrom is not
submitted with the Letter of Transmittal, the amount of such transfer taxes will
be billed directly to such tendering holder.
 
CONSEQUENCES OF FAILURE TO EXCHANGE
 
    The Old Notes that are not exchanged for New Notes pursuant to the Exchange
Offer will remain restricted securities within the meaning of Rule 144 of the
Securities Act. Accordingly, such Old Notes may be resold only (i) to the
Company or any subsidiary thereof, (ii) to a qualified institutional buyer in
compliance with Rule 144A, (iii) to an institutional accredited investor that,
prior to such transfer, furnishes to the Trustee a signed letter containing
certain representations and agreements relating to the restrictions on transfer
of the Old Notes (the form of which letter can be obtained from the Trustee)
and, if such transfer is in respect of an aggregate principal amount of Old
Notes at the time of transfer of less than $100,000, an opinion of counsel
acceptable to the Company that such transfer is in compliance with the
Securities Act, (iv) outside the United States in compliance with Rule 904 under
the Securities Act, (v) pursuant to the exemption from registration provided by
Rule 144 under the Securities Act (if available), or (vi) pursuant to an
effective registration statement under the Securities Act. The liquidity of the
Old Notes could be adversely affected by the Exchange Offer. Following the
consummation of the Exchange Offer, holders of the Senior Preferred Stock will
have no further registration rights under the Registration Rights Agreement and
will not be entitled to the contingent increase in the dividend rate applicable
to the Old Notes.
 
                                       28
<PAGE>
             UNAUDITED PRO FORMA CONSOLIDATED FINANCIAL STATEMENTS
 
   
    The Unaudited Pro Forma Combined Statements of Operations and other
financial data for the year ended December 31, 1997, and for the six months
ended June 30, 1998, and the Unaudited Pro Forma Combined Balance Sheet at June
30, 1998, reflect the historical results and the historical financial position,
respectively, of the Company, adjusted to give effect to the Offering and the
application of the net proceeds therefrom, the completion of the Worland Field
Acquisition and the related financing, as though each of the transactions had
occurred on January 1, 1997 with regard to the Unaudited Pro Forma Combined
Statements of Operations and on June 30, 1998 with regard to the Unaudited Pro
Forma Combined Balance Sheet. The pro forma adjustments are based upon available
information and assumptions that management of the Company believes are
reasonable. The Unaudited Pro Forma Consolidated Financial Statements do not
purport to represent the financial position or results of operations which would
have occurred had such transactions been consummated on the dates indicated or
the Company's financial position or results of operations for any future date or
period. The Unaudited Pro Forma Consolidated Financial Statements and notes
thereto should be read in conjunction with the Financial Statements included
elsewhere in this Prospectus.
    
 
                                       29
<PAGE>
   
                          CONTINENTAL RESOURCES, INC.
                   UNAUDITED PRO FORMA COMBINED BALANCE SHEET
                                AT JUNE 30, 1998
    
 
   
<TABLE>
<CAPTION>
                                                                              ADJUSTMENTS
                                                              --------------------------------------------
                                                  JUNE 30,    WORLAND FIELD
                                                    1998       ACQUISITION     COMBINING      OFFERING       PRO FORMA
                                                 -----------  --------------  -----------  ---------------  -----------
                                                                         (DOLLARS IN THOUSANDS)
<S>                                              <C>          <C>             <C>          <C>              <C>
ASSETS
Current assets:
  Cash and cash equivalents....................  $     1,336  $   19,581(a)    $   1,336   $   145,335(c)   $     2,113
                                                                 (19,581)(b)                  (140,669)(d)
                                                                                                (3,889)(e)
  Accounts receivable:
    Oil and gas sales..........................        6,350                       6,350                          6,350
    Joint interest and other...................        9,383                       9,383                          9,383
  Inventories..................................        4,963                       4,963                          4,963
  Prepaid expenses.............................          360                         360                            360
  Advances to affiliates.......................       19,625     (19,581)(a)          44                             44
                                                 -----------  --------------  -----------  ---------------  -----------
Total current assets...........................       42,017     (19,581)         22,436           777           23,213
                                                 -----------  --------------  -----------  ---------------  -----------
Oil and gas properties(f):
  Producing properties.........................      233,600                     233,600                        233,600
  Non-producing properties.....................       49,029                      49,029                         49,029
Gas gathering and processing facilities........       22,561                      22,561                         22,561
Service properties, equipment and other........       13,650                      13,650                         13,650
                                                 -----------  --------------  -----------  ---------------  -----------
Total property and equipment, net..............      318,840        --           318,840                        318,840
Less--accumulated depreciation, depletion and
 amortization..................................     (103,918)                   (103,918)                      (103,918)
                                                 -----------  --------------  -----------                   -----------
Net property and equipment.....................      214,922        --           214,922                        214,922
                                                                                                 3,889(e)
Other assets...................................          924                         924         4,665(c)         9,478
                                                 -----------  --------------  -----------  ---------------  -----------
Total assets...................................  $   257,863  $  (19,581)      $ 238,282   $     9,331      $   247,613
                                                 -----------  --------------  -----------  ---------------  -----------
                                                 -----------  --------------  -----------  ---------------  -----------
 
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
  Accounts payable.............................  $    12,235                   $  12,235                    $    12,235
  Current portion of long-term debt............          315                         315                            315
  Revenues and royalties payable...............        3,654                       3,654                          3,654
  Accrued liabilities and other................        2,951                       2,951                          2,951
                                                 -----------  --------------  -----------  ---------------  -----------
Total current liabilities......................       19,155        --            19,155                         19,155
                                                 -----------  --------------  -----------  ---------------  -----------
Long-term debt, net of current portion.........      163,737     (19,581)(b)     144,156   $   150,000(c)       153,487
                                                                                              (140,669)(d)
Other non-current liabilities..................          206                         206                            206
Stockholders' equity...........................       74,765                      74,765                         74,765
                                                 -----------  --------------  -----------  ---------------  -----------
Total liabilities and stockholders' equity.....  $   257,863  $  (19,581)      $ 238,282   $     9,331      $   247,613
                                                 -----------  --------------  -----------  ---------------  -----------
                                                 -----------  --------------  -----------  ---------------  -----------
</TABLE>
    
 
            See Notes to Unaudited Pro Forma Combined Balance Sheet.
 
                                       30
<PAGE>
              NOTES TO UNAUDITED PRO FORMA COMBINED BALANCE SHEET
 
   
(a) To record payment by principal shareholder for balance owed on sale of
    Worland Field Properties.
    
 
   
(b) To apply proceeds from principal shareholder received on sale of Worland
    Field Properties to outstanding balance owed on Credit Facility.
    
 
   
(c) To record the proceeds from the Offering, net of Offering costs of $4.7
    million, and the related debt.
    
 
   
(d) To record the use of the net proceeds of the Offering to reduce debt
    outstanding under the Credit Facility.
    
 
   
(e) To record a $3.9 million settlement of a forward interest rate swap contract
    which the Company entered into in May 1998 to hedge its exposure to changes
    in prevailing interest rates in connection with the Old Notes Offering. Due
    to changes in interest rates for U.S. treasury notes, the Company was
    required to pay $3.9 million, which will result in an increase of
    approximately 0.5% to the Company's effective interest rate on the Notes and
    which will increase interest expense on the Notes by approximately $0.4
    million per year through 2008.
    
 
   
(f) See "Business--Oil and Gas Reserves" for information regarding pro forma
    reserve quantities and the standardized measure of discounted cash flows
    with respect to such pro forma reserve quantities.
    
 
                                       31
<PAGE>
                          CONTINENTAL RESOURCES, INC.
 
             UNAUDITED PRO FORMA COMBINED STATEMENTS OF OPERATIONS
 
                          YEAR ENDED DECEMBER 31, 1997
 
   
<TABLE>
<CAPTION>
                                                                            ADJUSTMENTS
                                                            --------------------------------------------
                                                            WORLAND FIELD
                                               HISTORICAL    ACQUISITION     COMBINING      OFFERING       PRO FORMA
                                               -----------  --------------  -----------  ---------------  -----------
                                                                       (DOLLARS IN THOUSANDS)
<S>                                            <C>          <C>             <C>          <C>              <C>
Revenue:
  Oil and gas sales..........................   $  78,599   $   10,126(a)    $  88,725                     $  88,725
  Gathering, marketing and processing........      25,021                       25,021                        25,021
  Oil and gas service operations.............       6,405                        6,405                         6,405
                                               -----------  --------------  -----------                   -----------
Total revenues...............................     110,025       10,126         120,151                       120,151
Operating costs and expenses:
  Production expenses and taxes..............      20,748        5,210(a)       25,958                        25,958
  Exploration expenses.......................       6,806                        6,806                         6,806
  Gathering, marketing and processing........      22,715                       22,715                        22,715
  Oil and gas service operations.............       3,654                        3,654                         3,654
  Depreciation, depletion and amortization...      33,354        1,116(b)       34,470   $       460(c)       35,319
                                                                                                 389(d)
 
  General and administrative.................       8,990                        8,990                         8,990
                                               -----------  --------------  -----------  ---------------  -----------
Total operating costs and expenses...........      96,267        6,326         102,593           849         103,442
                                               -----------  --------------  -----------  ---------------  -----------
Operating income.............................      13,758        3,800          17,558          (849)         16,709
Interest income..............................         241                          241         1,350(e)        1,591
Interest expense.............................      (4,804)                      (4,804)      (10,880)(f)     (15,684)
Other income (expense), net..................       8,061                        8,061                         8,061
                                               -----------  --------------  -----------  ---------------  -----------
Income before income taxes...................      17,256        3,800          21,056       (10,379)         10,677
Federal and state income taxes (benefit).....      (8,941)                      (8,941)                       (8,941)
                                               -----------  --------------  -----------  ---------------  -----------
Net income...................................   $  26,197   $    3,800       $  29,997   $   (10,379)      $  19,618
                                               -----------  --------------  -----------  ---------------  -----------
                                               -----------  --------------  -----------  ---------------  -----------
</TABLE>
    
 
- --------------------------
 
(a) To record the revenues and direct operating expenses attributable to the
    Company's net interest in oil and gas properties acquired in the Worland
    Field Acquisition for the periods indicated.
 
(b) To record estimated pro forma depreciation, depletion and amortization
    related to the Company's net interest in the Worland Field properties as if
    the Worland Field Acquisition had occurred on January 1, 1997. The estimated
    pro forma depreciation, depletion and amortization was at an average rate of
    $1.53 per Boe based on an allocation of the purchase price to the individual
    properties acquired and the actual production during the year ended December
    31, 1997.
 
   
(c) To record the pro forma amortization of estimated costs of the Offering,
    assuming the Offering was completed on January 1, 1997.
    
 
   
(d) To record the pro forma amortization expense of capitalized interest rate
    hedge associated with the sale of the Old Notes assuming such sale was
    completed on January 1, 1997. In May 1998, the Company entered into a
    forward interest rate swap contract to hedge its exposure to changes in
    prevailing interest rates. Due to changes in treasury note rates, the
    Company paid $3.9 million to settle the forward interest rate swap contract.
    This payment will result in an increase of approximately 0.5% to the
    Company's effective interest rate or an increase in interest expense of
    approximately $0.4 million per year over the next 10 years.
    
 
   
(e) To record the estimated pro forma interest income resulting from an
    investment at a 5% interest rate of the net proceeds of the Offering
    remaining after payment of the Credit Facility, assuming the Offering was
    consummated on January 1, 1997.
    
 
   
(f)  To record the pro forma effect of interest expense related to the Notes
    assuming (i) the Offering occurred on January 1, 1997 and (ii) the net
    proceeds from the Offering are used to reduce debt outstanding under the
    Credit Facility which was incurred to finance the Worland Field Acquisition,
    and taking into consideration the proceeds from the sale of a 50% interest
    in the Worland Field properties to the Company's principal shareholder as if
    the sale had occurred on January 1, 1997.
    
 
                                       32
<PAGE>
                          CONTINENTAL RESOURCES, INC.
 
             UNAUDITED PRO FORMA COMBINED STATEMENTS OF OPERATIONS
 
   
                         SIX MONTHS ENDED JUNE 30, 1998
    
 
   
<TABLE>
<CAPTION>
                                                                             ADJUSTMENTS
                                                              -----------------------------------------
                                                              WORLAND FIELD
                                                 HISTORICAL    ACQUISITION    COMBINING     OFFERING      PRO FORMA
                                                 -----------  -------------  -----------  -------------  -----------
                                                                       (DOLLARS IN THOUSANDS)
<S>                                              <C>          <C>            <C>          <C>            <C>
Revenue:
  Oil and gas sales............................   $  31,291   $   2,127(a)    $  33,418                   $  33,418
  Gathering, marketing and processing..........       9,804                       9,804                       9,804
  Oil and gas service operations...............       3,062                       3,062                       3,062
                                                 -----------  -------------  -----------                 -----------
Total revenues.................................      44,157       2,127          46,284           0          46,284
                                                 -----------  -------------  -----------                 -----------
Operating costs and expenses:
  Production expenses and taxes................       9,074       1,268(a)       10,342                      10,342
  Exploration expenses.........................       2,650                       2,650                       2,650
  Gathering, marketing and processing..........       8,409                       8,409                       8,409
  Oil and gas service operations...............       1,825                       1,825                       1,825
  Depreciation, depletion and amortization.....      16,483       1,025(b)       17,508   $     233(c)       17,935
                                                                                                194(d)
  General and administrative...................       4,914                       4,914                       4,914
                                                 -----------  -------------  -----------  -------------  -----------
Total operating costs and expenses.............      43,355       2,293          45,648         427          46,075
                                                 -----------  -------------  -----------  -------------  -----------
Operating income...............................         802        (166)            636        (427)            209
Interest income................................         780                         780          50(e)          830
Interest expense...............................      (5,174)                     (5,174)     (2,662)(f)      (7,836)
Other income (expense), net....................          92                          92                          92
                                                 -----------  -------------  -----------  -------------  -----------
Total other income and (expenses)..............      (4,302)       --            (4,302)     (2,612)         (6,914)
Income (loss) before income taxes..............      (3,500)       (166)         (3,666)     (3,039)         (6,705)
Federal and state income taxes.................           0           0               0           0               0
                                                 -----------  -------------  -----------  -------------  -----------
Net income (loss)..............................   $  (3,500)  $    (166)      $  (3,666)  $  (3,039)      $  (6,705)
                                                 -----------  -------------  -----------  -------------  -----------
                                                 -----------  -------------  -----------  -------------  -----------
Earnings (loss) per common share...............   $  (71.37)                  $  (74.75)                  $ (136.73)
                                                 -----------                 -----------                 -----------
                                                 -----------                 -----------                 -----------
</TABLE>
    
 
- --------------------------
 
(a) To record the revenues and direct operating expenses attributable to the
    Company's net interest in oil and gas properties acquired in the Worland
    Field Acquisition for the periods indicated.
 
   
(b) To record the estimated pro forma depreciation, depletion and amortization
    related to the Company's net interest in the Worland Field properties as if
    the Worland Field Acquisition had occurred on January 1, 1997. The estimated
    pro forma depreciation, depletion and amortization was at an average rate of
    $3.16 per Boe based on an estimated allocation of the purchase price to the
    individual properties acquired in 1998 and the actual production during the
    six months ended June 30, 1998.
    
 
(c) To record the pro forma amortization of estimated costs of the Offering,
    assuming the Offering was completed on January 1, 1997.
 
   
(d) To record the pro forma amortization expense of capitalized interest rate
    hedge associated with the sale of the Old Notes assuming such sale was
    completed on January 1, 1997. In May 1998, the Company entered into a
    forward interest rate swap contract to hedge its exposure to changes in
    prevailing interest rates. Due to changes in treasury note rates, the
    Company paid $3.9 million to settle the forward interest rate swap contract.
    This payment will result in an increase of approximately 0.5% to the
    Company's effective interest rate or an increase in interest expense of
    approximately $0.4 million per year over the next 10 years.
    
 
   
(e) To record the estimated pro forma interest income resulting from an
    investment at a 5% interest rate of the net proceeds of the Offering
    remaining after payment of the Credit Facility, assuming the Offering was
    consummated on January 1, 1997.
    
 
   
(f)  To record the pro forma effect of interest expense related to the Notes
    assuming (i) the Offering occurred on January 1, 1997 and (ii) the net
    proceeds from the Offering are used to reduce debt outstanding under the
    Credit Facility which was incurred to finance the Worland Field Acquisition,
    and taking into consideration the proceeds from the sale of a 50% interest
    in the Worland Field properties to the Company's principal shareholder as if
    the sale had occurred on January 1, 1997.
    
 
                                       33
<PAGE>
                      SELECTED CONSOLIDATED FINANCIAL DATA
 
   
    The following table sets forth selected historical consolidated financial
data for the periods ended and as of the dates indicated. The statements of
operations and other financial data for the periods ended December 31, 1994,
1995, 1996 and 1997, and the balance sheet data as of December 31, 1995, 1996
and 1997 have been derived from, and should be reviewed in conjunction with, the
consolidated financial statements of the Company, and the notes thereto, which
have been audited by Arthur Andersen LLP, independent public accountants. The
statements of operations and other financial data for the periods ended December
31, 1993, June 30, 1997 and June 30, 1998, and the balance sheet data as of
December 31, 1994, June 30, 1997 and June 30, 1998, have been derived from the
unaudited financial statements of the Company, which, in the opinion of
management, include all adjustments necessary to present fairly the data for
such periods. The financial statements as of December 31, 1996, December 31,
1997 and June 30, 1998 and for the years ended December 31, 1995, 1996 and 1997
and for the periods ended June 30, 1997 and June 30, 1998 are included elsewhere
in this Prospectus. The data should be read in conjunction with
"Capitalization," "Management's Discussion and Analysis of Financial Condition
and Results of Operations" and the Financial Statements and the related notes
thereto included elsewhere in this Prospectus.
    
   
<TABLE>
<CAPTION>
                                                                                                                            SIX
                                                                                                                          MONTHS
                                                                                                                           ENDED
                                                                                 YEAR ENDED DECEMBER 31,                 JUNE 30,
                                                                  -----------------------------------------------------  ---------
                                                                    1993       1994       1995       1996       1997       1997
                                                                  ---------  ---------  ---------  ---------  ---------  ---------
                                                                                            (DOLLARS IN THOUSANDS)
<S>                                                               <C>        <C>        <C>        <C>        <C>        <C>
STATEMENT OF OPERATIONS DATA:
  Revenue:
    Oil and gas sales...........................................  $  16,002  $  21,427  $  30,576  $  75,016  $  78,599  $  39,135
    Gathering, marketing and processing.........................      3,061     14,806     20,639     25,766     25,021     15,522
    Oil and gas service operations..............................      3,063      5,630      6,148      6,491      6,405      3,715
                                                                  ---------  ---------  ---------  ---------  ---------  ---------
  Total revenues................................................     22,126     41,863     57,363    107,273    110,025     58,372
  Operating costs and expenses:
    Production expenses and taxes...............................      2,455      6,905      7,611     19,338     20,748     10,622
    Exploration expenses........................................      1,996      6,338      6,184      4,512      6,806      3,410
    Gathering, marketing and processing.........................      2,436      8,415     13,223     21,790     22,715     12,873
    Oil and gas service operations..............................      1,975      2,708      3,680      4,034      3,654      1,855
    Depreciation, depletion and amortization....................      4,816      6,068      9,614     22,876     33,354     16,713
    General and administrative..................................      3,658      6,396      8,260      9,155      8,990      3,986
                                                                  ---------  ---------  ---------  ---------  ---------  ---------
  Total operating costs and expenses............................     17,336     36,830     48,572     81,705     96,267     49,459
                                                                  ---------  ---------  ---------  ---------  ---------  ---------
  Operating income..............................................      4,790      5,033      8,791     25,568     13,758      8,913
  Interest income...............................................        138        108        137        312        241        104
  Interest expense..............................................       (314)      (670)    (2,396)    (4,550)    (4,804)    (2,313)
  Other revenue (expense), net(1),(2)...........................      4,132         --       (411)       233      8,061        685
                                                                  ---------  ---------  ---------  ---------  ---------  ---------
  Income before income taxes....................................      8,746      4,471      6,121     21,563     17,256      7,389
  Federal and state income taxes (benefit)(3)...................      2,974      1,596      2,252      8,238     (8,941)    (8,941)
                                                                  ---------  ---------  ---------  ---------  ---------  ---------
  Net income....................................................  $   5,772  $   2,875  $   3,869  $  13,325  $  26,197  $  16,330
                                                                  ---------  ---------  ---------  ---------  ---------  ---------
                                                                  ---------  ---------  ---------  ---------  ---------  ---------
OTHER FINANCIAL DATA:
  EBITDA(4).....................................................  $  11,872  $  17,547  $  24,315  $  53,502  $  54,721  $  29,825
  Net cash provided by operations...............................     12,758     18,787     18,985     41,724     51,477     27,948
  Net cash used in investing....................................    (12,402)   (19,256)   (58,022)   (50,619)   (78,359)   (39,673)
  Net cash provided by (used in) financing......................      2,963     (1,138)    37,994     10,494     24,863      8,556
  Capital expenditures(5).......................................     11,818     20,143     58,226     50,341     80,937     41,678
RATIOS:
  Adjusted EBITDA to interest expense...........................       37.8x      26.2x      10.1x      11.8x      11.4x      12.9x
  Total debt to adjusted EBITDA.................................        0.6x       0.4x       1.8x       1.0x       1.5x       n/a
  Earnings to fixed charges(6)..................................       28.9x       7.7x       3.6x       5.7x       4.6x       4.2x
BALANCE SHEET DATA (AT PERIOD END):
  Cash and cash equivalents.....................................  $   4,373  $   2,766  $   1,722  $   3,320  $   1,301  $     151
  Total assets..................................................     49,592     56,759    107,825    145,693    188,386    159,755
  Long-term debt, including current maturities..................      7,514      6,272     44,265     54,759     79,632     63,325
  Stockholders' equity..........................................     32,008     34,883     38,752     52,077     78,264     68,398
 
<CAPTION>
 
                                                                    1998
                                                                  ---------
 
<S>                                                               <C>
STATEMENT OF OPERATIONS DATA:
  Revenue:
    Oil and gas sales...........................................  $  31,291
    Gathering, marketing and processing.........................      9,804
    Oil and gas service operations..............................      3,062
                                                                  ---------
  Total revenues................................................     44,157
  Operating costs and expenses:
    Production expenses and taxes...............................      9,074
    Exploration expenses........................................      2,650
    Gathering, marketing and processing.........................      8,409
    Oil and gas service operations..............................      1,825
    Depreciation, depletion and amortization....................     16,483
    General and administrative..................................      4,914
                                                                  ---------
  Total operating costs and expenses............................     43,355
                                                                  ---------
  Operating income..............................................        802
  Interest income...............................................        780
  Interest expense..............................................     (5,174)
  Other revenue (expense), net(1),(2)...........................         93
                                                                  ---------
  Income before income taxes....................................     (3,499)
  Federal and state income taxes (benefit)(3)...................          0
                                                                  ---------
  Net income....................................................  $  (3,499)
                                                                  ---------
                                                                  ---------
OTHER FINANCIAL DATA:
  EBITDA(4).....................................................  $  20,808
  Net cash provided by operations...............................      9,669
  Net cash used in investing....................................   (116,132)
  Net cash provided by (used in) financing......................    106,498
  Capital expenditures(5).......................................    116,534
RATIOS:
  Adjusted EBITDA to interest expense...........................        4.0x
  Total debt to adjusted EBITDA.................................        n/a
  Earnings to fixed charges(6)..................................        n/a
BALANCE SHEET DATA (AT PERIOD END):
  Cash and cash equivalents.....................................  $   1,336
  Total assets..................................................    257,863
  Long-term debt, including current maturities..................    164,052
  Stockholders' equity..........................................     74,765
</TABLE>
    
 
               See Notes to Selected Consolidated Financial Data.
 
                                       34
<PAGE>
                 NOTES TO SELECTED CONSOLIDATED FINANCIAL DATA
 
(1) In 1993, other income includes $4.0 million resulting from the settlement of
    certain litigation matters.
 
(2) In 1997, other income includes $7.5 million resulting from the settlement of
    certain litigation matters.
 
(3) Effective June 1, 1997, the Company elected to be treated as a S Corporation
    for federal income tax purposes. The conversion resulted in the elimination
    of the Company's deferred income tax assets and liabilities existing at May
    31, 1997 and, after being netted against the then existing tax provision,
    resulted in a net income tax benefit to the Company of $8.9 million.
 
   
(4) Adjusted EBITDA represents earnings before interest expense, income taxes,
    depreciation, depletion, amortization and exploration expense, excluding
    proceeds from litigation settlements. Adjusted EBITDA is not a measure of
    cash flow as determined in accordance with GAAP. Adjusted EBITDA should not
    be considered as an alternative to, or more meaningful than, net income or
    cash flow as determined in accordance with GAAP or as an indicator of a
    company's operating performance or liquidity. Certain items excluded from
    adjusted EBITDA are significant components in understanding and assessing a
    company's financial performance, such as a company's cost of capital and tax
    structure, as well as historic costs of depreciable assets, none of which
    are components of adjusted EBITDA. The Company's computation of adjusted
    EBITDA may not be comparable to other similarly titled measures of other
    companies. The Company believes that adjusted EBITDA is a widely followed
    measure of operating performance and may also be used by investors to
    measure the Company's ability to meet future debt service requirements, if
    any. Even though the volume of oil and gas produced by the Company during
    the six months ended June 30, 1998, on an actual and pro forma basis, was
    greater than in the comparable period in 1997, the Company's Adjusted EBITDA
    for the 1998 period was less than in 1997. The decrease in Adjusted EBITDA
    for the 1998 period was attributable to declines in oil and gas prices.
    Adjusted EBITDA does not give effect to the Company's exploration
    expenditures, which are largely discretionary by the Company and which, to
    the extent expended, would reduce cash available for debt service, repayment
    of indebtedness and dividends.
    
 
(5) Capital expenditures include costs related to acquisitions of producing oil
    and gas properties.
 
(6) For purposes of computing the ratio of earnings to fixed charges, earnings
    are computed as income before taxes from continuing operations, plus fixed
    charges. Fixed charges consist of interest expense and amortization of costs
    incurred in the Offering.
 
                                       35
<PAGE>
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
    The following discussion should be read in conjunction with the Company's
consolidated financial statements and notes thereto and the Selected
Consolidated Financial Data included elsewhere herein.
 
OVERVIEW
 
   
    The Company's revenue, profitability and cash flow are substantially
dependent upon prevailing prices for oil and gas and the volumes of oil and gas
it produces. Although the Company produced more oil and gas in the first quarter
of 1998 than in the first quarter of 1997, it experienced a significant decline
in revenues, net income and Adjusted EBITDA in the first half of 1998 compared
to the first half of 1997 because of lower prevailing oil and gas prices. These
lower prices have continued to adversely affect the Company's revenues and
results of operation since June 30, 1998. Given the volatile nature of oil and
gas prices, it is difficult to predict whether such effects will continue during
the remainder of 1998. Average prices as of September 30, 1998, on a pro forma
basis, were $12.95 per Bbl of oil and $1.66 per Mcf of natural gas compared to
$18.06 per Bbl of oil and $2.25 per Mcf of natural gas as of December 31, 1997.
If the September 30, 1998 pro forma prices were applied to the Company's
estimated proved reserves as of December 31, 1997, the Company's pro forma PV-10
would have been approximately $208.7 million compared to a pro forma PV-10 of
$267.0 million using December 31, 1997 prices. In addition, the Company's proved
reserves and oil and gas production will decline as oil and gas are produced
unless the Company is successful in acquiring producing properties or conducting
successful exploration and development drilling activities.
    
 
    The Company uses the successful efforts method of accounting for its
investment in oil and gas properties. Under the successful efforts method of
accounting, costs to acquire mineral interests in oil and gas properties, to
drill and provide equipment for exploratory wells that find proved reserves and
to drill and equip development wells are capitalized. These costs are amortized
to operations on a unit-of-production method based on petroleum engineer
estimates. Geological and geophysical costs, lease rentals and costs associated
with unsuccessful exploratory wells are expensed as incurred. Maintenance and
repairs are expensed as incurred, except that the cost of replacements or
renewals that expand capacity or improve production are capitalized. Significant
downward revisions of quantity estimates or declines in oil and gas prices that
are not offset by other factors could result in a writedown for impairment of
the carrying value of oil and gas properties. Once incurred, a writedown of oil
and gas properties is not reversible at a later date, even if oil or gas prices
increase.
 
    The Company is a S Corporation for federal income tax purposes. The Company
currently anticipates it will pay quarterly dividends in amounts sufficient to
enable the Company's shareholders to pay their income tax obligations with
respect to the Company's taxable earnings.
 
                                       36
<PAGE>
RESULTS OF OPERATIONS
 
   
    The following tables set forth selected financial and operating information
for each of the three years in the period ended December 31, 1997 and for the
six months ended June 30, 1997 and 1998:
    
 
   
<TABLE>
<CAPTION>
                                                                     YEAR ENDED                   SIX MONTHS
                                                                    DECEMBER 31,                ENDED JUNE 30,
                                                          ---------------------------------  --------------------
                                                            1995        1996        1997       1997       1998
                                                          ---------  ----------  ----------  ---------  ---------
                                                                 (DOLLARS IN THOUSANDS, EXCEPT PRICE DATA)
<S>                                                       <C>        <C>         <C>         <C>        <C>
Revenues................................................  $  57,363  $  107,273  $  110,025  $  58,372  $  44,157
Operating expenses......................................     48,572      81,705      96,267     49,459     43,355
Non-Operating income (expense)..........................     (2,670)     (4,005)      3,498     (1,524)    (4,301)
Net income after tax....................................      3,869      13,325      26,197     16,330     (3,499)
Adjusted EBITDA(1)......................................     24,315      53,502      54,721     29,825     20,807
Production Volumes(2):
  Oil and condensate (MBbls)............................      1,199       2,888       3,518      1,615      1,983
  Natural gas (MMcf)....................................      5,880       6,527       5,789      2,881      2,933
  Oil equivalents (MBoe)................................      2,179       3,976       4,483      2,095      2,472
Average Prices(3):
  Oil and condensate (per Bbl)..........................  $   17.11  $    20.78  $    18.61  $   20.08  $   13.14
  Natural gas (per Mcf).................................       1.40        2.13        2.21       2.33       1.79
  Oil equivalents (per Boe).............................      14.03       18.87       17.53      18.68      12.66
</TABLE>
    
 
- --------------------------
 
   
(1) Adjusted EBITDA represents earnings before interest expense, income taxes,
    depreciation, depletion, amortization and exploration expense, excluding
    proceeds from litigation settlements. EBITDA is not a measure of cash flow
    as determined in accordance with GAAP.  Adjusted EBITDA should not be
    considered as an alternative to, or more meaningful than, net income or cash
    flow as determined in accordance with GAAP or as an indicator of a company's
    operating performance or liquidity. Certain items excluded from Adjusted
    EBITDA are significant components in understanding and assessing a company's
    financial performance, such as a company's cost of capital and tax
    structure, as well as historic costs of depreciable assets, none of which
    are components of EBITDA. The Company's computation of Adjusted EBITDA may
    not be comparable to other similarly titled measures of other companies. The
    Company believes that Adjusted EBITDA is a widely followed measure of
    operating performance and may also be used by investors to measure the
    Company's ability to meet future debt service requirements, if any. Even
    though the volume of oil and gas produced by the Company during the six
    months ended June 30, 1998, on an actual and pro forma basis, was greater
    than in the comparable period in 1997, the Company's adjusted EBITDA for the
    1998 period was less than in 1997. The decrease in adjusted EBITDA for the
    1998 period was attributable to declines in oil and gas prices. Adjusted
    EBITDA does not give effect to the Company's exploration expenditures, which
    are largely discretionary by the Company and which, to the extent expended,
    would reduce cash available for debt service, repayment of indebtedness and
    dividends.
    
 
(2) Production volumes of oil and condensate, and natural gas, are derived from
    the Company's production records and reflect actual quantities produced
    without regard to the time of receipt of proceeds from the sale of such
    production. Production volumes of oil equivalents (on a Boe basis) are
    determined by dividing the total Mcfs of natural gas produced by six and by
    adding the resultant sum to barrels of oil and condensate produced.
 
(3) Average prices of oil and condensate, and of natural gas, are derived from
    the Company's production records which are maintained on an "as produced"
    basis, which give effect to gas balancing and oil produced and in the tanks,
    and, accordingly, may differ from oil and gas revenues for the same periods
    as reflected in the Financial Statements. Average prices of oil equivalents
    were calculated by dividing oil and gas revenues, as reflected in the
    Financial Statements, by production volumes on a per Boe basis. Average sale
    prices per Boe realized by the Company, according to its production records
    which are maintained on an "as produced" basis, for the years ended December
    31, 1995, 1996 and 1997, were $13.19, $18.59 and $17.53, respectively.
 
                                       37
<PAGE>
   
SIX MONTHS ENDED JUNE 30, 1998 COMPARED TO SIX MONTHS ENDED JUNE 30, 1997
    
 
   
    OIL AND GAS SALES revenue for the six months ended June 30, 1998 decreased
$7.8 million, or 20%, to $31.3 million from $39.1 million for the comparable
period in 1997. Oil price decreases from an average of $20.08 per Bbl in the
period during 1997 to $13.14 per Bbl in 1998 which resulted in an $11.2 million
reduction in revenues. The effect of the price reduction was partially offset by
a 368 MBbl increase in oil production. The increase in production, based on 1998
prices, resulted in $4.8 million of additional revenue for the six month period
in 1998. Gas revenues for the six months ended June 30, 1998 decreased by $1.5
million, or 22%, to $5.2 million from $6.7 million during the comparable period
in 1997, attributable mainly to lower gas prices for the six-month period in
1998 on relatively stable gas volumes. Average prices fell to $1.79 per Mcf
during the six-month period in 1998 from $2.33 per Mcf in the comparable period
in 1997.
    
 
   
    GATHERING, MARKETING AND PROCESSING revenue for the six months ended June
30, 1998 was $9.8 million, a decrease of $5.7 million, or 37%, from $15.5
million in the same period in 1997, which was attributable primarily to the
elimination of purchases and resales of third party gas for marketing purposes
and a refocus on purchases to supply the Company's gas plants.
    
 
   
    OIL AND GAS SERVICE OPERATIONS revenue for the six months ended June 30,
1998 was $3.1 million, a decrease of $0.6 million, or 18%, compared to $3.7
million in the same period in 1997, which was attributable to declining oil
prices on reclaimed oil sales.
    
 
   
    PRODUCTION EXPENSES AND TAXES for the six months ended June 30, 1998 were
$9.1 million, a decrease of $1.5 million, or 15%, compared to $10.6 million in
the same period in 1997, which was attributable to increased production
efficiencies and lower gross production taxes per Boe due to price declines.
    
 
   
    EXPLORATION EXPENSES for the six months ended June 30, 1998 were $2.6
million, a decrease of $0.8 million, or 22%, compared to $3.4 million in the
same period in 1997, resulting primarily from a $0.3 million decrease in expired
lease expense and a $0.6 million decrease in geological expense. During the
period from July 1, 1998 through December 31, 1998, leases on approximately
26,000 net leasehold acres, with a cost of $1.4 million, will expire and in
1999, leases on approximately 40,000 net acres, with a cost of $2.2 million,
will expire. The Company has not yet determined if all or any of these leases
will be drilled, renewed or allowed to expire.
    
 
   
    GATHERING, MARKETING AND PROCESSING EXPENSE for the six months ended June
30, 1998 was $8.4 million, a $4.5 million, or 35% decrease compared to $12.9
million in the same period in 1997. The decrease was attributable primarily to
the eliminations of purchases of third party gas not used for gas plant supply,
but sold as part of the Company's gas marketing activities.
    
 
   
    DEPRECIATION, DEPLETION AND AMORTIZATION ("DD&A") EXPENSE for the six months
ended June 30, 1998 was $16.5 million, a $0.2 million, or .1% decrease compared
to $16.7 million in 1997. The insignificant decrease in DD&A expense is
primarily attributable to a reduction in the rate of production on the Company's
older properties, and the fact that the older properties are almost fully
depreciated and incur less depreciation expense each year. The unit rate of DD&A
expense per Boe in the first half of 1998 was $6.95, compared with $7.31 in the
1997 period.
    
 
   
    GENERAL AND ADMINISTRATIVE ("G&A") EXPENSE for the six months ended June 30,
1998 was $4.9 million minus overhead reimbursement of $1.0 million for a net G&A
expense of $3.9 million, or an increase of $1.7 million, or 80%, compared to G&A
expense of $4.0 million in the first half of 1997 minus overhead reimbursement
of $1.8 million for a net G&A expense of $2.2 million. The increase was
primarily due to an employment and benefits increase of $0.5 million and a
reduction of overhead reimbursement of $0.8 million.
    
 
                                       38
<PAGE>
   
    INTEREST EXPENSE for the six months ended June 30, 1998 was $5.2 million, an
increase of $2.9 million, or 124%, compared to $2.3 million in the 1997 period
attributable primarily to higher levels of indebtedness outstanding during 1998.
In May 1998, the Company entered into a forward interest rate swap contract to
hedge its exposure to changes in the prevailing interest rates in connection
with its planned debt offering. Due to the change in treasury note rates, the
Company paid $3.9 million to settle the forward interest rate swap contract,
which will result in an increase of approximately 0.5% to the Company's
effective interest rate, or an annual increase in interest expense of
approximately $2.4 million in 1998.
    
 
   
    INTEREST AND OTHER INCOME for the six months ended June 30, 1998 was $0.8
million, an increase of $0.7 million, or 652%, from $0.1 million realized in the
same period in 1997. Other income decreased $0.6 million or 87%, to $0.1 million
for the six months ended June 30, 1998 from $0.7 million for the comparable 1997
period. The decrease was due to lower gains on the sale of assets. The Company
has orally agreed to sell all of its interests in certain Illinois properties to
the operator of the properties. Based on a sales price of $3.5 million, it is
estimated that the Company will recognize a gain of approximately $2.7 million
during 1998.
    
 
   
    INCOME BEFORE INCOME TAXES for the six months ended June 30, 1998 was a loss
of $3.5 million, a decrease of $10.9 million, or 147%, from $7.4 million in the
1997 period, attributable primarily to lower revenues from oil and gas sales,
and increased interest expense, partially offset by reduced operations expenses.
    
 
   
    NET INCOME for the six months ended June 30, 1998 was a net loss of $3.5
million, a decrease of $19.8 million, or 121%, compared to the 1997 period. Net
income for the period declined by a $14.2 million reduction in revenues because
of lower oil and gas prices which was partially offset by a $6.1 million
reduction in operating expenses, and an increase of $2.9 million in interest
expense. Net income for 1997 also included a $8.9 million tax benefit due to the
"S" election that will not have an impact on 1998 net income.
    
 
YEAR ENDED DECEMBER 31, 1997 COMPARED TO YEAR ENDED DECEMBER 31, 1996
 
    OIL AND GAS SALES revenue in 1997 was $78.6 million, an increase of $3.6
million, or 5.0%, over $75.0 million in 1996. In 1997, the Company sold an
aggregate of 3,518 MBbls, a 22% increase over 1996 oil sales of 2,888 MBbls. The
Company's natural gas sales in 1997 aggregated to 5,789 MMcf, an 11% decrease
over its 1996 natural gas sales of 6,527 MMcf. In 1997, the Company received
average prices of $18.61 per Bbl and $2.21 per Mcf, compared to $20.78 per Bbl
and $2.13 per Mcf, respectively, in 1996.
 
    GATHERING, MARKETING AND PROCESSING revenue in 1997 was $25.0 million, a
decrease of $0.8 million, or 3.0%, from $25.8 million in 1996, which was
attributable primarily to lower spot prices for natural gas.
 
    OIL AND GAS SERVICE OPERATIONS revenue in 1997 was $6.4 million, a decrease
of $0.1 million, or 1%, compared to $6.5 million in 1996.
 
    PRODUCTION EXPENSES AND TAXES in 1997 were $20.7 million, an increase of
$1.4 million, or 7%, compared to $19.3 million in 1996, which was attributable
to a 13% increase in production volume offset by a 5% decrease in production
costs per Boe.
 
    EXPLORATION EXPENSES were $6.8 million in 1997, an increase of $2.3 million,
or 51%, compared to $4.5 million in 1996, resulting primarily from a $0.5
million increase in expired lease expense and a $1.0 million increase in 3-D
seismic expenditures.
 
    GATHERING, MARKETING AND PROCESSING EXPENSE in 1997 was $22.7 million, a
$0.9 million, or 4% increase, compared to $21.8 million, which in 1996 was
attributable to reduced margins on natural gas and natural gas liquids.
 
                                       39
<PAGE>
    OIL AND GAS SERVICE OPERATIONS EXPENSE in 1997 was $3.7 million, a $0.3
million, or 9%, decrease from $4.0 million in 1996, attributable to a reduction
in saltwater disposal activity and warehouse activity.
 
    DD&A EXPENSE in 1997 was $33.4 million, a $10.5 million, or 46% increase
compared to $22.9 million in 1996. DD&A expense related to oil and gas
operations in 1997 was $30.2 million, an $8.6 million, or 40% increase, compared
to $21.6 million in 1996, attributable primarily to higher production levels in
1997. The unit rate of DD&A expense per Boe in 1997 was $6.74, compared with
$5.44 in 1996. The 1997 DD&A rate included $5.0 million of additional impairment
for writedown of certain long-lived assets in accordance with the provisions of
SFAS No. 121, or $1.12 per Boe.
 
    G&A EXPENSE for 1997 was $9.0 million minus overhead reimbursement of $2.4
million for a net G&A expense of $6.6 million, which was equal to net G&A
expense of 6.6 million in 1996.
 
    INTEREST EXPENSE in 1997 was $4.8 million, an increase of $0.2 million, or
6%, compared to $4.6 million in 1996, attributable primarily to higher levels of
indebtedness outstanding during 1997.
 
    INTEREST AND OTHER INCOME in 1997 was $8.3 million, a $7.8 million, or
1,560%, increase over $0.5 million realized in 1996. The substantial increase in
1997 was primarily attributable to non-recurring income of approximately $7.5
million resulting from the settlement of certain litigation matters.
 
    INCOME BEFORE INCOME TAXES in 1997 was $17.3 million, a decrease of $4.3
million, or 20%, from $21.6 million in 1996, attributable primarily to increased
production expenses and taxes, exploration expenses, gathering, marketing and
processing expenses and DD&A expense, partially offset by an increase in total
revenues of approximately $10.5 million, which included approximately $7.5
million related to the settlement of certain litigation matters.
 
    NET INCOME in 1997 was $26.2 million, an increase of $12.9 million, or 97%,
compared to $13.3 million in 1996, primarily attributable to an $8.9 million tax
benefit realized in 1997, compared to a $8.2 million tax expense in 1996, and
the recognition of approximately $7.5 million related to the settlement of
certain litigation matters.
 
YEAR ENDED DECEMBER 31, 1996 COMPARED TO YEAR ENDED DECEMBER 31, 1995
 
   
    OIL AND GAS SALES revenue in 1996 was $75.0 million, an increase of $44.4
million, or 145%, over $30.6 million in 1995. In 1996, the Company sold an
aggregate of 2,888 MBbls, a 141% increase over 1995 oil sales of 1,199 MBbls.
During 1995 and 1996 the Company drilled 33 and 34 net wells, respectively, and
in December 1995 acquired four High Pressure Air Injection units and 10
individual wells from Koch Exploration Co. Production in 1996 from the wells
drilled in 1995 and 1996 was 407 MBbls and 411 Mbbls, respectively, and
production from the acquired properties added an additional 839 Mbbls of oil to
production. The Company's natural gas sales in 1996 aggregated to 6,527 MMcf, an
11% increase over its 1995 natural gas sales of 5,880 MMcf. In 1996, the Company
received average prices of $20.78 per Bbl and $2.13 per Mcf, compared to $17.11
per Bbl and $1.40 per Mcf, respectively, in 1995.
    
 
    GATHERING, MARKETING AND PROCESSING revenue in 1996 was $25.8 million, an
increase of $5.2 million, or 25%, from $20.6 million in 1995, attributable to
increased throughput on the Company's natural gas gathering systems.
 
    OIL AND GAS SERVICE OPERATIONS revenue in 1996 was $6.5 million, an increase
of $0.4 million, or 6%, compared to $6.1 million in 1995, attributable to an
increase in warehouse pipe sales.
 
    PRODUCTION EXPENSES AND TAXES in 1996 were $19.3 million, an increase of
$11.7 million, or 154%, compared to $7.6 million in 1995, attributable to
increased production volumes.
 
    EXPLORATION EXPENSES in 1996 were $4.5 million, a decrease of $1.6 million,
or 27%, compared to $6.2 million in 1995, resulting primarily from a reduction
of dry hole expenses of $1.6 million.
 
                                       40
<PAGE>
    GATHERING, MARKETING AND PROCESSING EXPENSE in 1996 was $21.8 million, an
$8.6 million, or 65% increase, compared to $13.2 million in 1995, was
attributable to increased throughput on the Company's natural gas gathering
systems.
 
    OIL AND GAS SERVICE OPERATIONS EXPENSE in 1996 was $4.0 million, a $0.3
million, or 10%, increase from $3.7 million in 1995, attributable to an increase
in repairs on saltwater disposal wells.
 
    DD&A EXPENSE in 1996 was $22.9 million, a $13.3 million, or 138% increase
compared to $9.6 million in 1995. DD&A expense related to oil and gas operations
in 1996 was $21.6 million, a $12.6 million, or 140% increase, compared to $9.0
million in 1995, attributable primarily to higher production levels in 1996. The
unit rate of DD&A expense per Boe in 1996 was $5.44, compared with $3.76 in
1995. The 1996 DD&A rate included $2.1 million of additional impairment for
writedown of certain long-lived assets in accordance with the provisions of SFAS
No. 121, or $0.53 per Boe.
 
    G&A EXPENSE in 1996 was $9.2 million minus overhead reimbursed of $2.6
million for a net G&A expense of $6.6 million, an increase of $0.6 million, or
9%, compared to G&A expense of $8.3 million in 1995 minus overhead reimbursement
of $2.3 million for net G&A expense of $6 million. The increase was attributable
to an increase in salaries and hiring of additional employees.
 
    INTEREST EXPENSE in 1996 was $4.6 million, an increase of $2.2 million, or
90%, compared to $2.4 million in 1995, attributable primarily to higher levels
of indebtedness outstanding during 1996 related to drilling activities in North
Dakota.
 
    INTEREST AND OTHER INCOME in 1996 was $0.5 million, a $0.8 million, or 299%,
increase over $(0.3) million realized in 1995. The increase in 1996 was
primarily attributable to gain on the sale of assets.
 
    INCOME BEFORE INCOME TAXES in 1996 was $21.6 million, an increase of $15.5
million, or 252%, from $6.1 million in 1995, attributable primarily to increased
oil and gas sales and gathering, marketing and processing revenues, partially
offset by increases in production expenses and taxes, gathering, marketing and
processing expenses and DD&A expense.
 
    NET INCOME in 1996 was $13.3 million, an increase of $9.4 million, or 244%,
compared to $3.9 million in 1995, primarily attributable to increased income
before income taxes partially offset by a larger income tax expense.
 
LIQUIDITY AND CAPITAL RESOURCES
 
   
    During 1997, and the six months ended June 30, 1998, the Company utilized
its beginning cash balance, cash flow from operations and financing provided by
a bank and by the Company's principal shareholder to fund its exploration and
development expenditures, as well as the construction of a natural gas
processing plant and pipeline infrastructure in the Williston Basin.
    
 
   
    CASH FLOW FROM OPERATIONS.  Net cash provided by operating activities was
$51.5 million for 1997, a 23% and 171% increase from the $41.7 million and $19.0
million in 1996 and 1995, respectively. Net cash provided by operating
activities was $9.7 million for the six months ended June 30, 1998, a 66%
decrease from the $28.0 million for the six months ended June 30, 1997. Cash and
short-term cash investments decreased to $1.3 million at December 31, 1997, from
$3.3 million at year-end 1996, and increased to $1.3 million at June 30, 1998,
from $.2 million at June 30, 1997.
    
 
   
    RESERVES ADDED AND FINDING COST.  During 1997 and the six months ended June
30, 1998, the Company spent $59.5 million and $114.0 million, respectively, on
acquisitions, exploration, exploitation and development of oil and gas
properties. The 1998 amount includes the acquisition of the Worland Field
properties. Total estimated proved reserves of natural gas decreased from 50.5
Bcf at year-end 1996 to 49.4 Bcf at year-end 1997, and estimated total proved
oil reserves increased from 19.5 MMBbls at year-end 1996 to 24.7 MMBbls at
year-end 1997.
    
 
                                       41
<PAGE>
   
    FINANCING.  Long-term debt at December 31, 1997 and June 30, 1998 was $79.3
million and $163.7 million, respectively. The $84.4 million, or 106%, increase
was mainly due to the acquisition of approximately $86.5 million of producing
and non-producing oil and gas properties and certain other related assets in the
Worland Field effective as of June 1, 1998.
    
 
   
    CREDIT FACILITY.  Long-term debt outstanding under the Credit Facility at
December 31, 1997 and June 30, 1998 included $53.7 million and $160.3 million,
respectively, of revolving credit debt under the Credit Facility. The effective
rate of interest under the Credit Facility was 7.7% at December 31, 1997 and was
7.5% at June 30, 1998. On July 24, 1998 the balance under the Credit Facility
was $162.8 million which was paid off with $19.6 million in proceeds from the
sale of a 50% interest in the Worland Properties and $143.2 million of the
proceeds from the issuance of the Notes. Upon issuance of the Notes and payment
of the outstanding balance on the Credit Facility the Credit Facility was
amended to a $75.0 million Credit Facility with a $75.0 million borrowing base.
The Credit Facility matures May 14, 2001. The Credit Facility provides for
interest based on the prime rate of Bank One Oklahoma, N.A., or the London
Interbank Offered Rate for 1, 2, 3 or 6-month offshore deposits as offered by
Bank One to major banks in the London Interbank Market, rounded upwards, if
necessary, to the nearest 1/16%, and adjusted for maximum cost of reserves, if
any. As of August 20, 1998 the Company has borrowed $4.0 million against this
Credit Facility.
    
 
   
    SENIOR NOTES.  On July 24, 1998, the Company consummated a private sale of
$150.0 million principal amount of Old Notes. Interest on the Old Notes (and New
Notes issued in exchange therefor) accrues at an annual rate of 10 1/4% and is
payable semiannually on each February 1 and August 1, commencing February 1999.
Approximately $143.2 million of the net proceeds from the sale of the Old Notes
was used to reduce indebtedness under the Credit Facility, which indebtedness
had been incurred in order to consummate the Worland Field Acquisition. As a
result of the issuance of the Old Notes the maturity of the Company's
outstanding indebtedness was extended from four to ten years, availability under
the Company's Credit Facility was increased by $50 million, and the interest
rate on outstanding indebtedness was increased by 2.5%. The issuance of the Old
Notes and the application of the net proceeds therefrom has not adversely
impacted the Company's liquidity.
    
 
   
    CAPITAL EXPENDITURES.  The Company expects higher production volumes in 1998
compared to 1997. The expected increase in volume is primarily due to the
production associated with the Worland Field properties, as well as certain new
oil and gas properties expected to commence production during the year. Revenue
in 1998, however, has been and continues to be adversely impacted by lower
prevailing oil and gas prices, which are expected to remain volatile. The
Company's 1998 capital expenditures budget is $45.4 million, exclusive of
acquisitions. During the six months ended June 30, 1998, the Company incurred
$30.0 million of capital expenditures, exclusive of acquisitions. The Company
expects to fund the 1998 capital budget through cash flow from operations and
its Credit Facility.
    
 
   
    PURCHASE OF WORLAND FIELD.  On May 18, 1998, the Company consummated the
purchase for approximately $86.5 million of producing and non-producing oil and
gas properties and certain other related assets in the Worland Properties
effective as of June 1, 1998, which the Company funded through borrowings on its
line of credit. Subsequently, and effective June 1, 1998, the Company sold an
undivided 50% interest in the Worland Properties (excluding inventory and
certain equipment) to the Company's principal stockholder for approximately
$42.6 million. Of the total sale price to the stockholder, approximately
$23,000,000 plus interest of approximately $.3 million was offset against the
outstanding balance of notes payable to the stockholder and approximately $19.6
million was recorded as an increase in advances to affiliates in the
accompanying June 30, 1998 consolidated condensed balance sheet. Based on
current contract prices and production levels, proceeds from the sale of oil
produced by the Worland Field properties are sufficient to cover operating costs
and interest expense. The Company expects that the development potential of its
Worland Field properties should increase future cash flows from such properties.
At present, the Worland Field Acquisition has not materially affected the
Company's liquidity.
    
 
                                       42
<PAGE>
   
    SHAREHOLDER DISTRIBUTION.  The 1997 tax returns of the Company's
shareholders are expected to be filed by October 15, 1998. The Company expects
to distribute a dividend of approximately $2.5 million to its shareholders prior
to December 31, 1998 to cover the shareholders' 1997 tax liability. Because of
funds available to the Company under its Credit Facility, such dividend will not
have a material effect on the Company's liquidity.
    
 
   
    YEAR 2000.  The Company is reviewing its computer software and hardware,
telecommunications systems, process control systems and business relationships
to locate potential operational problems associated with the year 2000.
    
 
   
    The Company's computer consultant has reviewed the Company's mainframe
hardware and operating software and updates to both have been performed. One
additional programming change has been provided for the operating system, and it
will be installed before the end of 1998. At that time the Company believes the
mainframe computer system will be year 2000 compatible. The financial software
package utilized on the mainframe computer has already been tested and updated
by the software vendor. The Company is in the process of developing a plan to
further test the financial software during the first quarter of 1999 to insure
the compatibility of the software with the year 2000. Assessment of other less
critical software systems and various types of computer equipment is continuing
and should be completed by November 1998. The Company believes that the
potential impact, if any, of these systems not being year 2000 compliant may, at
most, require employees to manually complete otherwise automated tasks or
calculations.
    
 
   
    The telephone system billing software utilized in tracking telephone usage
is known to be incompatible with the year 2000. A plan is already in place to
increase the capacity of the telephone system and new software will be installed
at that time to make the system year 2000 compatible. The cost of this update
will be less than $15,000. The Company believes that the radios being used for
communications with field operations will not be impacted. The Company also
relies on various public telephone companies to supply normal voice and
electronic data service and service to operating locations which utilize process
control alarms. These alarms notify Company personnel if there are operations
abnormalities that need to be checked and, if necessary, corrected. If the
telephone service were disrupted, the operations would need to be more closely
monitored by Company personnel, but because the operations are not actually
controlled through the phone systems, there should be no interruption in
operations. Surveys will be made of all telephone companies to determine their
system readiness and contingency plans will be developed for those areas where
service that is year 2000 compliant has not been verified.
    
 
   
    The gas measurement systems and gas processing facilities that the Company
operates use various Program Logic Controllers ("PLC's") and alarm mechanisms.
The Company has been verbally notified that the measurement systems that it
currently uses are year 2000 compatible and Company tests have been done to
verify that information. The dates on test meters were adjusted to December 29,
1999 and the meters were ran for several days. When the meters rolled to the
year 2000, and for several days after the change to the new year, there were no
complications encountered. However, the Company utilizes a third party for gas
chart integration and has not verified the readiness of that company to
integrate charts which cross into the year 2000. The Company will include the
third party in surveys to be sent to vendors prior to the end of March, 1999. At
this time there has been no action taken to evaluate the gas processing
facilities for potential problem areas. The management of these facilities has
been notified of the need to evaluate the systems and is in the process of
putting together a plan of action which will coincide with routine maintenance.
The Company believes that the PLC and alarms at its Medicine Pole Hills Gas
Plant are the most likely to be at risk for incompatibility and could be
replaced at a cost of about $20,000.
    
 
   
    There can be no guarantee that the systems of other companies on which the
Company's systems rely will be timely converted, or that a failure to convert by
another company, or a conversion that is incompatible with the Company's systems
would not have a material adverse effect on the Company. The Company will be
evaluating its relationships with third parties to determine any critical
services, suppliers,
    
 
                                       43
<PAGE>
   
or customers. The third parties will include financial services, utility
services, oil and gas purchasers and parts and supply vendors. Once critical
relationships have been identified the third parties will be surveyed and their
preparedness for year 2000 evaluated. If the Company believes that the third
parties have not minimized risk satisfactorily it will evaluate alternatives to
the current relationships. The survey and evaluation of preparedness should be
completed by June 30, 1999.
    
 
   
    The Company believes that there is minimal risk associated with internal
operating systems in relation to year 2000 compatibility. Plans are already in
place to address known areas of incompatibility at costs estimated to be less
than $100,000. Because of the immaterial nature of the expenditures on an
individual basis, the Company plans to finance all costs through normal
operating funds.
    
 
   
    HEDGING.  From time to time, the Company may use energy swap and forward
sale arrangements to reduce its sensitivity to oil and gas price volatility.
However, the Company had no energy swap or forward sale arrangement in place at
December 31, 1997 or at June 30, 1998. The Company plans to reduce its hedging
transactions. In August, 1998, the Company began engaging in oil trading
arrangements as part of its oil and gas marketing activities. See "Business--Oil
and Gas Marketing."
    
 
    The Company has only limited involvement with derivative financial
instruments, as defined in SFAS No. 119 "Disclosure About Derivative Financial
Instruments and Fair Value of Financial Instruments" and does not use them for
trading purposes. The Company's objective is to hedge a portion of its exposure
to price volatility from producing oil and natural gas. These arrangements
expose the Company to the credit risk of its counterparties and to basis risk.
 
   
    In connection with the Notes Offering, the Company entered into an interest
rate hedge on which it experienced a $3.9 million loss. The Company has no
present plans to engage in further interest rate hedges. See "Unaudited Pro
Forma Consolidated Financial Statements."
    
 
   
    OTHER.  The Company follows the "sales method" of accounting for its gas
revenue, whereby the Company recognizes sales revenue on all gas sold,
regardless of whether the sales are proportionate to the Company's ownership in
the property. A liability is recognized only to the extent that the Company has
a net imbalance in excess of its share of the reserves in the underlying
properties. The Company's historical aggregate imbalance positions have been
immaterial. The Company believes that any future periodic settlements of gas
imbalances will have little impact on its liquidity.
    
 
   
    The Company has sold a number of non-strategic oil and gas properties and
other properties over the past three years, recognizing a pretax loss of
approximately $411,000 in 1995, and pretax gains of approximately $233,000 and
$674,000 in 1996 and 1997, respectively. Total amounts of oil and gas reserves
associated with these dispositions during the last three years were 294 MBbls of
oil and 2,298 MMcf of natural gas.
    
 
                                       44
<PAGE>
                            BUSINESS AND PROPERTIES
 
GENERAL
 
   
    Continental is engaged in the development, exploitation, exploration and
acquisition of oil and gas reserves, primarily in the Rocky Mountains and the
Mid-Continent and, to a lesser extent, in the Gulf Coast region of Texas and
Louisiana. In addition to its exploration, development and production
activities, the Company owns and operates 1,000 miles of natural gas pipelines,
five gas gathering systems and three gas processing plants in its operating
areas. The Company also engages in natural gas marketing, gas pipeline
construction and saltwater disposal. Capitalizing on its growth through the
drill-bit and its acquisition strategy, on a pro forma basis the Company has
increased its estimated proved reserves from 12.7 MMBoe in 1993 to 64.9 MMBoe in
1997, and increased its annual production from 2.0 MMBoe in 1993 to 5.2 MMBoe in
1997. At December 31, 1997, on a pro forma basis, approximately 80% of the
Company's estimated proved reserves were oil and approximately 63% of its total
estimated reserves were classified as proved developed. At June 30, 1998, the
Company had interests in 1,399 producing wells of which it operated 1,114.
    
 
   
    The Company's Rocky Mountain activities are concentrated in the Williston
and Big Horn Basins. The Company's operations in the Williston Basin are focused
on the Cedar Hills Field, which the Company believes is, potentially, one of the
largest onshore discoveries in the lower 48 states since 1971. The Cedar Hills
Field represented approximately 45% of the PV-10 attributable to the Company's
estimated proved reserves at December 31, 1997, on a pro forma basis. In the
Williston Basin, the Company owns approximately 465,000 net leasehold acres and
has interests in 328 gross (255 net) wells, has identified 105 potential
drilling locations and conducts both primary drilling and enhanced recovery
operations. The Company recently expanded its activities into the Big Horn Basin
through the acquisition of producing and non-producing properties in the Worland
Field. The Company currently owns approximately 35,000 net leasehold acres in
the Big Horn Basin and has interests in 292 gross (127 net) producing wells
which, on a pro forma basis, represented approximately 10% of the PV-10
attributable to the Company's estimated proved reserves at December 31, 1997,
and it operates 272 of such wells. In the Big Horn Basin the Company has
identified 164 potential drilling locations which represent significant
opportunities.
    
 
   
    The Company's Mid-Continent activities are conducted primarily in the
Anadarko Basin of western Oklahoma, southwestern Kansas and the Texas Panhandle
and, to a lesser extent, in the Arkoma Basin of southeastern Oklahoma and in
southern Illinois. At December 31, 1997 the Company's Anadarko Basin properties
represented approximately 95% of the PV-10 attributable to the Company's
estimated proved reserves in the Mid-Continent and approximately 36% of the
Company's total estimated proved reserves, on a pro forma basis. In the Anadarko
Basin the Company owns approximately 55,000 net leasehold acres, has interests
in 661 gross (408 net) producing wells and has identified 11 potential drilling
locations. The Company also owns leasehold interests and expects to expand its
exploration activities in the Arkoma Basin and Gulf Coast region of Texas and
Louisiana.
    
 
   
    The Company was originally formed in 1967 as Shelly Dean Oil Company to
explore, develop and produce oil and gas properties in Oklahoma. In 1991, the
Company changed its name to Continental Resources, Inc. In 1993, the Company
acquired interests in the Williston Basin and expanded its operations into that
area and has since focused its operations in the Rocky Mountains.
    
 
   
    The Company formed Continental Gas, Inc. as a gas marketing company in April
1990. Continental Gas , Inc. has developed into a company specializing in gas
marketing, pipeline construction, gas gathering systems and gas plant
operations.
    
 
                                       45
<PAGE>
BUSINESS STRENGTHS
 
    The Company believes that it has certain strengths that provide it with
significant competitive advantages, including the following:
 
    PROVEN GROWTH RECORD.  Continental has demonstrated consistent growth
through a balanced program of development and exploratory drilling and
acquisitions. During the five years ended December 31, 1997, the Company
increased proved reserves by 411%, production by 161% and EBITDA by 414%, on a
pro forma basis.
 
   
    SUBSTANTIAL DEVELOPMENT DRILLING INVENTORY.  The Company has identified over
275 potential development drilling locations based on geological and geophysical
evaluations. As of June 30, 1998, on a pro forma basis, the Company held
approximately 583,000 net acres, of which approximately 64% were classified as
undeveloped. Management believes that its current acreage holdings could support
five to seven years of drilling activities based upon oil and gas prices in
effect at June 30, 1998.
    
 
    LONG-LIFE NATURE OF RESERVES.  Continental's producing reserves are
primarily characterized by low rate, relatively stable, mature production that
is subject to gradual decline rates. As a result of the long-lived nature of its
properties, the Company has relatively low reinvestment requirements to maintain
reserve quantities, primary and secondary production levels and reserve values.
At December 31, 1997, on a pro forma basis, the Company's proved reserve life
index was 12.5 years.
 
    SUCCESSFUL DRILLING RECORD.  The Company has maintained a successful
drilling record. In the blanket type Red River B formation of the Williston
Basin, the Company's success rate during the three years ended December 31, 1997
was 92%, while in its other areas, the success rate was 65%, resulting in an
overall success rate of 85%. During the five years ended December 31, 1997 the
Company participated in 253 gross (175 net) wells which resulted in the addition
of 24.9 MMBoe at an average cost of $5.50 per Boe.
 
    SIGNIFICANT OPERATIONAL CONTROL.  Approximately 94% of the Company's PV-10
at December 31, 1997, on a pro forma basis, was attributable to wells operated
by the Company, giving Continental significant control over the amount and
timing of capital expenditures and production, operating and marketing
activities.
 
    TECHNOLOGICAL LEADERSHIP.  The Company has demonstrated significant
expertise in the rapidly evolving technologies of 3-D seismic evaluation and
precision horizontal drilling, and is among the few companies in North America
to successfully utilize high pressure air injection ("HPAI") enhanced recovery
technology on a large scale. Through the combination of precision horizontal
drilling and HPAI secondary recovery technology, the Company has significantly
enhanced the recoverable reserves underlying its oil and gas properties. Since
its inception, Continental has experienced a 300% to 400% increase in
recoverable reserves through use of these technologies.
 
    EXPERIENCED AND COMMITTED MANAGEMENT.  Continental's senior management team
has extensive experience in the oil and gas industry. The Chief Executive
Officer, Harold Hamm, began his career in the oil and gas industry in 1967 and
has grown Continental's revenues to $120.2 million in 1997, on a pro forma
basis. Seven senior officers have an average of 20 years of oil and gas industry
experience. Additionally, the Company's technical staff, which includes ten
petroleum engineers and ten geoscientists, has an average of over 20 years
experience in the industry.
 
BUSINESS STRATEGY
 
    The Company's strategy is to increase reserves, production and cash flow.
Key elements of the Company's strategy are:
 
    MAINTAIN A BALANCED DRILLING PROGRAM.  Continental has historically grown
through a balanced program of exploratory and development drilling and
acquisitions. Commencing in 1993, approximately 70%
 
                                       46
<PAGE>
   
of wells drilled by the Company have been development wells and the Company
expects a similar balance from its current drilling inventory. Approximately 85%
of the Company's current inventory is focused on further expansion and
development of oil projects in the Rocky Mountains, while the remainder is
focused on natural gas projects in the Mid-Continent and the Gulf Coast. The
Company currently has an inventory of 252 potential development drilling
locations. The Company's drilling budget for 1998 is $36.0 million, which is
expected to fund the drilling of 38 gross (26.6 net) wells; and for the six
months ended June 30, 1998, the Company expended $24.6 million in drilling 25
gross (16.8 net) wells.
    
 
    MAXIMIZE RESERVE RECOVERY.  The Company routinely uses advanced technology
such as precision horizontal drilling, 3-D seismic technology and HPAI
technology in its operations. Management believes that its expertise in
horizontal drilling and its record of over 20 years of successfully utilizing
HPAI technology provide the Company with a distinct competitive advantage for
its development and exploration program. Since its inception, Continental has
drilled 130 and participated in another 27 horizontal wells. The Company
currently operates four of the eight active HPAI projects in North America and
six traditional water-flood projects, and is evaluating three additional
waterflood and two additional HPAI projects, as well as approximately 185
workovers of existing wells. The Company intends to continue to apply HPAI
technology to its Cedar Hills Field and West Medicine Pole Hills properties to
maximize oil recoveries. Based on its experience in operating HPAI projects,
Continental believes that the use of HPAI technology coupled with precision
horizonal drilling in secondary recovery operations will increase total oil
recovery by 300% to 400% over average primary production, or by 50% over
secondary recovery utilizing traditional waterflooding.
 
    ACQUISITIONS OF OIL AND GAS RESERVES.  The Company focuses on acquisitions
that (i) complement its existing exploration program, (ii) provide opportunities
to utilize the Company's technological advantages, (iii) have the potential for
enhanced recovery activities, and/or (iv) provide new core areas for the
Company's operations.
 
    MAINTAIN LOW COST STRUCTURE.  The management team is committed to a low cost
structure in order to maximize cash flow and earnings. Continental has achieved
low operating and general and administrative costs through economies of scale
and geographic focus. The Company's finding costs are expected to decline over
time as the benefits of secondary recovery methods are realized.
 
    EXPAND GAS GATHERING AND MARKETING.  Continental's extensive gas gathering
infrastructure and its regional natural gas marketing operations are integral to
the Company's low cost structure and high revenues per unit of gas production.
The Company intends to expand its gas gathering systems to further improve the
rate of return on drilling and development activities and to increase the
throughput of natural gas from third parties. The gas marketing operation
provides a ready market for increased production, allowing the Company to
increase its marketing of third-party gas as well as its own production.
 
DEVELOPMENT, EXPLOITATION AND EXPLORATION ACTIVITIES
 
   
    DEVELOPMENT AND EXPLOITATION.  The Company's development and exploitation
activities include drilling of development wells, precision drilling of
horizontal wells, infill drilling, waterfloods, workovers, recompletions and
HPAI projects. The Company's development activities are focused primarily in the
Rocky Mountains, specifically in the Cedar Hills Field, the Medicine Pole Hills,
Buffalo, South Buffalo and West Buffalo Units in the Williston Basin and the
Worland Field in the Big Horn Basin. Approximately 85% of the Company's
development drilling inventory (252 wells) is focused on further expansion and
development of these areas. In addition, the Company is planning two HPAI oil
recovery projects and approximately 156 workovers of existing wells in the Rocky
Mountains. In the Mid-Continent, the Company is evaluating four new waterflood
projects to complement the six waterfloods it currently operates and has 35
workovers planned. All are oil projects in areas where the Company has
operational
    
 
                                       47
<PAGE>
   
experience and technical expertise and benefits from economies of scale. The
following table sets forth information pertaining to the Company's proven
development inventory at June 30, 1998:
    
 
   
<TABLE>
<CAPTION>
                                                                            NUMBER OF DEVELOPMENT PROJECTS
                                                            --------------------------------------------------------------
                                                                                                 ENHANCED
                                                              DRILLING       WORKOVERS AND       RECOVERY
                                                              LOCATIONS      RECOMPLETIONS       PROJECTS         TOTAL
                                                            -------------  -----------------  ---------------     -----
<S>                                                         <C>            <C>                <C>              <C>
ROCKY MOUNTAINS:
  Williston Basin.........................................           67               10                 2             79
  Big Horn Basin..........................................          158              146                 -            304
MID-CONTINENT:
  Anadarko Basin..........................................           11               30                 3             44
  Arkoma Basin............................................           10                5                 -             15
  Southern Illinois.......................................            -                -                 1              1
GULF COAST................................................            6                2                 -              8
                                                                                                        --
                                                                    ---              ---                              ---
    TOTAL.................................................          252              193                 6            451
                                                                                                        --
                                                                                                        --
                                                                    ---              ---                              ---
                                                                    ---              ---                              ---
</TABLE>
    
 
    The Company currently anticipates that it will initiate 50 to 100
development projects in 1998. Assuming that 100 projects per year are initiated,
the Company currently has more than a five year inventory of development
projects. Continental expects to spend approximately $130 million over the next
three years for development projects.
 
    EXPLORATION ACTIVITIES.  The Company's existing inventory of exploration
projects varies in risk and reward based on their depth, location and geology.
The Company intends to use advanced technology, including 3-D seismic,
horizontal drilling and improved completion techniques, to enhance a significant
portion of the Company's existing and future exploration projects. The Company
currently estimates that it will spend $3.1 million on seismic activities over
the next three years. The Company is pursuing ten higher risk/reward exploration
prospects in the Gulf Coast and Rocky Mountains. In these ten prospects, the
Company has an inventory of 43 exploratory drilling locations in various stages
of readiness.
 
    The Gulf Coast prospects include the Jefferson Island project in Iberia
Parish, Louisiana, and the Pebble Beach project in Neuces County, Texas. The
Jefferson Island project is an underdeveloped salt dome that produces from a
series of prolific Miocene sands. To date the field has produced 22.0 MMBoe,
from approximately one quarter of the total dome. The remaining three quarters
of the dome are essentially unexplored or are underdeveloped. The Company
controls 6,283 gross (2,742 net) acres over the entire salt dome and has
identified 12 exploratory locations. The Company has an agreement with a third
party who, at its expense, acquired 35 square miles of 3-D seismic data covering
the entire salt dome, in exchange for which the third party will earn the right
to a 50% interest in the project. The 3-D data is currently being processed and
prepared for interpretation. Drilling is expected to commence in the fourth
quarter of 1998. In the Pebble Beach project, 20 square miles of 3-D seismic
data has been acquired over the project area and two wells have been drilled to
date, neither of which was commercial. Currently, there are ten additional
drilling locations in the Pebble Beach project based on 3-D seismic data.
 
    In the Rocky Mountains, the Company has identified ten exploratory
prospects, representing 21 exploratory drilling locations. In the Lustre Field
and the NE Autumn prospect of the Williston Basin, the Company owns
approximately 90,000 net leasehold acres, and intends to combine 3-D seismic and
horizontal drilling to further develop and explore for oil on this acreage.
 
                                       48
<PAGE>
   
    The following table sets forth information pertaining to the Company's
existing exploration project inventory at June 30, 1998:
    
 
   
<TABLE>
<CAPTION>
                                                                               NUMBER OF EXPLORATION PROJECTS
                                                                           --------------------------------------
                                                                             DRILLING LOCATION      3-D SEISMIC
                                                                           ---------------------  ---------------
<S>                                                                        <C>                    <C>
ROCKY MOUNTAINS:
  Williston Basin........................................................               19                   3
  Big Horn Basin.........................................................                6                   1
MID-CONTINENT............................................................                -                   -
GULF COAST...............................................................               22                   1
                                                                                        --                  --
TOTAL....................................................................               47                   5
                                                                                        --                  --
                                                                                        --                  --
</TABLE>
    
 
SPECIALIZED TECHNOLOGY
 
   
    HORIZONTAL DRILLING OPERATIONS.  The Company's development, exploitation and
exploration activities include extensive use of precision horizontal drilling.
Through the use of precision horizontal drilling the Company has experienced a
400% to 700% increase in initial flow rates and, when coupled with HPAI
secondary recovery operations, a 300% to 400% increase in recovered reserves.
The increased recovered reserves, combined with increased production rates
offered by horizontal drilling, permitted the Company to co-discover and develop
the Cedar Hills Field from a reservoir that was historically perceived to be
non-commercial. From inception, the Company had drilled 136 horizontal wells in
the Rocky Mountains and Mid-Continent. The Company's primary horizontal drilling
objectives are non-fractured reservoirs that decline at a slower rate than
fractured reservoirs. For example, the horizontal wells in the Cedar Hills Field
have an average productive life of approximately 25 years, based solely on
primary production.
    
 
    HIGH PRESSURE AIR INJECTION.  The Company has successfully utilized high
pressure air injection technology to enhance the recovery of oil from its
properties in the Medicine Pole Hills, Buffalo, West Buffalo and South Buffalo
units in the Williston Basin. The Company expects to initiate HPAI in the Cedar
Hills Field and expand its use in the western part of the Medicine Pole Hills
Unit. HPAI consists of injecting compressed air into the target reservoir
through an injection well. As the compressed air is forced deeper into the
subsurface, air pressure and temperature increase, and the combination of
pressure, fuel and high temperature develops a burn front, creating gasses which
push further into the oil bearing formation. This pressure forces the oil in the
formation to move away from the pressure and, eventually, into the Company's
horizontal and vertical collector wells. In the Williston Basin, the use of HPAI
technology in secondary recovery operations, when coupled with precision
horizontal drilling, has increased total oil recovery by 300% to 400% over
average primary production, or by 50% over secondary recovery utilizing
traditional waterflooding. The Company's experience with HPAI technology has
demonstrated that production response using HPAI technology generally occurs in
one to three years, rather than five to six years using traditional
waterflooding. The Company currently conducts four of the eight active HPAI
projects in North America, the oldest of which has been operating for over 20
years.
 
ACQUISITION ACTIVITIES
 
    The Company seeks to acquire properties that have the potential to be
immediately accretive to cash flow, have long-lived, lower risk, relatively
stable production potential, and provide long-term growth in production and
reserves. The Company focuses on acquisitions that complement its existing
exploration program, provide opportunities to utilize the Company's
technological advantages, have the potential for enhanced recovery activities,
and/or provide new core areas for the Company's operations. See "--Principal Oil
and Gas Properties."
 
                                       49
<PAGE>
PRINCIPAL OIL AND GAS PROPERTIES
 
   
    Until 1993, the Company's oil and gas activities were focused in the
Mid-Continent. In 1993 the Company made the strategic move to increase oil
production and reserves by expanding its development and exploration activities
into the Rocky Mountains. The Company currently controls approximately 505,000
net acres in the Rocky Mountains and is ranked among the largest oil producers
in the Rocky Mountains. Continental's oil production is characterized by long
lived, stable production with high secondary and enhanced oil recovery potential
which perpetuates production and cash flow from its properties. On a pro forma
basis, approximately 80% of its estimated proved reserves at December 31, 1997
were oil. To achieve a more balanced reserve mix, the Company is focusing on
generating an increased inventory of natural gas drilling opportunities in the
Mid-Continent and Gulf Coast. Currently, 85% of the Company's drilling inventory
is focused on further expansion and development of its Rocky Mountain oil
fields, and the remaining 15% is focused on natural gas projects in the
Mid-Continent and Gulf Coast. The Company's Gulf Coast activities are conducted
onshore the Texas and Louisiana coasts. In the Gulf Coast, the Company holds
approximately 9,400 net leasehold acres and has identified 28 potential drilling
locations.
    
 
    The following table provides information with respect to the Company's net
proved reserves for its principal oil and gas properties as of December 31,
1997, on a pro forma basis:
 
<TABLE>
<CAPTION>
                                                                                         OIL
                                                                  OIL        GAS     EQUIVALENT   PERCENT OF
AREA                                                            (MBBL)     (MMCF)      (MBOE)        PV-10
- -------------------------------------------------------------  ---------  ---------  -----------  -----------
<S>                                                            <C>        <C>        <C>          <C>
ROCKY MOUNTAINS:
  Williston Basin............................................     21,495      4,741      22,285         52.9%
  Big Horn Basin.............................................     27,248     28,470      31,993          9.5
MID-CONTINENT:
  Anadarko Basin.............................................      3,039     41,427       9,944         35.6
  Arkoma Basin...............................................      -          2,967         494          1.4
  Southern Illinois..........................................        177      -             177          0.4
GULF COAST...................................................          8        243          49          0.2
                                                               ---------  ---------  -----------       -----
TOTALS.......................................................     51,967     77,848      64,942        100.0%
                                                               ---------  ---------  -----------       -----
                                                               ---------  ---------  -----------       -----
</TABLE>
 
ROCKY MOUNTAINS
 
   
    The Company's Rocky Mountain properties are located primarily in the
Williston Basin of North Dakota, South Dakota and Montana and in the Big Horn
Basin of Wyoming. Estimated proved reserves for its Rocky Mountains properties
at December 31, 1997, on a pro forma basis, totaled 54.3 MMBoe and represented
62.4% of the Company's PV-10. Approximately 56.3% of these estimated proved
reserves are proved developed. During the six months ended June 30, 1998, net
daily production from these properties averaged 9,699 Bbls of oil and 1,530 Mcf
of natural gas, or 9,954 Boe per day. The Company's leasehold interests include
146,832 net developed and 355,122 net undeveloped acres, which represent 25% and
61% of the Company's total leasehold, respectively. This leasehold is expected
to be developed utilizing 3-D seismic, precision horizontal drilling and HPAI,
where applicable. As of June 30, 1998, the Company's Rocky Mountain properties
included an inventory of 225 development and 25 exploratory drilling locations.
    
 
WILLISTON BASIN
 
   
    CEDAR HILLS FIELD.  The Cedar Hills Field was discovered in November 1994
and is still under development. During the six months ended June 30, 1998, the
Cedar Hills Field properties produced 6,923 net Bbls per day to the Company
interests and represented 45% of the PV-10 attributable to the Company's
estimated proved reserves as of December 31, 1997 on a pro forma basis. The
Cedar Hills Field
    
 
                                       50
<PAGE>
   
produces oil from the Red River "B" Formation, a thin (eight feet),
non-fractured, blanket-type, dolomite reservoir found at depths of 8,000 to
9,500 feet. All wells drilled by the Company in the Red River "B" Formation were
drilled exclusively with precision horizontal drilling technology. The Cedar
Hills Field covers approximately 200 square miles and has a known oil column of
1,000 feet. Through June 30, 1998, the Company drilled or participated in 146
gross (97 net) horizontal wells, of which 139 were successfully completed, for a
95% net success rate.
    
 
   
    The Company believes that the Red River "B" formation in the Cedar Hills
Field is well suited for enhanced secondary recovery using HPAI technology. On
four nearby HPAI projects operated by the Company, HPAI technology has increased
oil recoveries 200% to 300% over primary recovery with ultimate recoveries
reaching up to 40% of the original oil in place. The Company intends to initiate
installation of HPAI secondary recovery on certain of its Cedar Hills Field
properties upon completion of field unitization, which is expected to occur in
1999. The Company believes that HPAI could increase its total recovery from the
Cedar Hills Field by as much as 75 million net barrels. On May 15, 1998, the
Company and Burlington entered into a definitive agreement to exchange undivided
interests so that effective December 1, 1998 the Company will own working
interests ranging from 90% to 92% in approximately 65,000 gross (59,000 net)
leasehold acres in the northern half of the Cedar Hills Field. As a result of
the agreement, the Company will enhance its ability to unitize all interests in
the northern half of the Cedar Hills Field, which is necessary in order for the
Company to initiate the planned HPAI enhanced recovery operations in the Cedar
Hills Field. On August 19, 1998, the Company instituted a declaratory judgment
action against Burlington in the District Court of Garfield County, Oklahoma
(Case No. CJ-98-613-03) alleging that Burlington provided false and misleading
information regarding certain of Burlington's oil and gas properties to a third
party consultant charged with determining the relative values of oil and gas
properties owned by the Company and Burlington which served as the basis for the
exchange of interests. The Company also claims that the consultant relied on
such false and misleading information in determining the relative fair values of
the oil and gas interests. The Company seeks a declaratory judgment determining
that it is excused from further performance under its exchange agreement with
Burlington. Burlington has denied the Company's allegations and seeks specific
performance by the Company, plus monetary damages of an unspecified amount.
Burlington has removed the action to the United States District Court for the
Western District of Oklahoma (CIV. 98-1253-W). The Company has requested that
the case be remanded to the Oklahoma state court.
    
 
   
    As of June 30, 1998, there were 12 horizontal drilling locations in
inventory, all of which are development well locations.
    
 
   
    MEDICINE POLE HILLS, BUFFALO, WEST BUFFALO AND SOUTH BUFFALO UNITS.  In
1995, the Company acquired the following interests in four production units in
the Williston Basin: Medicine Pole Hills (63%); Buffalo (86%); West Buffalo
(82%); and South Buffalo (85%). During the six months ended June 30, 1998, these
units produced 2,221 Bbls per day, net to the Company's interests, and
represented 4.6 MMBoe or 7% of the pro forma PV-10 attributable to the Company's
estimated proved reserves as of December 31, 1997. These units are HPAI enhanced
recovery projects that produce from the Red River "B" Formation and are operated
by the Company. These units were discovered and developed with conventional
vertical drilling. The oldest vertical well in these units has been producing
for 44 years, demonstrating the long lived production characteristic of the Red
River "B" Formation. There are 104 producing wells in these units and current
estimates of remaining reserve life range from four to 16 years. The Company
plans to further develop these units and enhance production by drilling
strategically placed horizontal wells. There are currently 51 development
drilling locations identified in these units.
    
 
   
    LUSTRE AND MIDFORK FIELDS.  In January 1992, the Company acquired the Lustre
and Midfork Fields which, during the six months ended June 30, 1998, produced
299 Bbls per day, net to the Company's interests and represented 0.6 MMBoe or 1%
of the pro forma PV-10 attributable to its estimated proved reserves as of
December 31, 1997. Wells in both the Lustre and Midfork Fields produce from the
Charles "C" dolomite, at depths of 5,500 to 6,000 feet. Historically, production
from the Charles "C" has a low
    
 
                                       51
<PAGE>
daily production rate and is long lived. There are currently 37 wells producing
in the two fields, and no secondary recovery is underway in either field. The
Company currently owns 90,000 net acres in the Lustre and Midfork Fields and
plans to utilize 3-D seismic combined with horizontal drilling to further
exploit the Charles "C" reservoir, and to generate drilling opportunities for
deeper objectives underlying the Lustre and Midfork Fields as well as guide
exploration for new fields on its substantial undeveloped leasehold.
 
BIG HORN BASIN
 
   
    WORLAND FIELD.  On May 14, 1998, the Company consummated the purchase for
$86.5 million of producing and non-producing oil and gas properties and certain
other related assets in the Worland Field, effective as of June 1, 1998.
Subsequently, and effective as of June 1, 1998, the Company sold an undivided
50% interest in the Worland Field properties (excluding inventory and certain
equipment) to Harold Hamm, the Company's principal shareholder, for $42.6
million. The sale of the 50% interest in the Worland Field properties was
effected to reduce the size of the Company's exposure in one area, to reduce the
amount of future capital expenditures by the Company and to reduce the Company's
investment in oil, rather than natural gas, properties. See "Certain
Relationships and Related Transactions." The Worland Field properties cover
35,000 net leasehold acres in the Worland Field of the Big Horn Basin in
northern Wyoming, of which 22,753 net acres are held by production and 12,635
net acres are non-producing or prospective. Approximately two-thirds of the
Company's producing leases in the Worland Field are within five federal units,
the largest of which (the Cottonwood Creek Unit) has been producing for over 40
years. All of the units produce principally from the Phosphoria formation, which
is the most prolific oil producing formation in the Worland Field. Four of the
units are unitized as to all depths, with the Cottonwood Creek Field Extension
(Phosphoria) Unit being unitized only as to the Phosphoria formation. The
Company is the operator of all five of the federal units. The Company also
operates 40 of the 60 producing wells located on non-unitized acreage. The
Company's Worland Field properties include interests in 292 producing wells, 272
of which are operated by the Company.
    
 
   
    As of December 31, 1997, the estimated net proved reserves attributable to
the Company's Worland Field properties were approximately 32.0 MMBoe, with an
estimated PV-10 of $25.4 million. Approximately 85% of these proved reserves
consist of oil, principally in the Phosphoria formation. Oil produced from the
Company's Worland Field properties is low gravity, sour (high sulphur content)
crude, resulting in a lower sales price per barrel than non-sour crude, and is
sold into a Marathon pipeline or is trucked from the lease. Gas produced from
the Worland Field properties is also sour, resulting in a sale price that is
less per Mcf than non-sour natural gas. From the effective date of the Worland
Field Acquisition through September 30, 1998, the average price of crude oil
produced by the Worland Field properties was $5.19 per Bbl less than the NYMEX
price of crude oil. The Company entered into a new contract effective October 1,
1998 through March 31, 1999 to sell crude oil produced from its Worland Field
properties at an average price of $3.19 per Bbl less than the NYMEX price.
    
 
    In addition to the proved reserves, the Company has identified 158 locations
on its Worland Field properties, to further develop and exploit the undeveloped
portion of the Worland Field. Over 100 wells have been identified for acid
fracture stimulation, most of which have been classified as having proved
developed non-producing reserves. The Company believes that secondary and
tertiary recovery projects will have significant potential for the addition of
reserves. In addition, six drilling prospects have been identified on the
Company's Worland Field properties in which prospects the Company and its
principal shareholder, together, have a majority leasehold position, allowing
for further exploration for and exploitation of the Phosphoria, Tensleep,
Frontier and Muddy formations and other prospective formations for additional
reserves.
 
MID-CONTINENT
 
    The Company's Mid-Continent properties are located primarily in the Anadarko
Basin of western Oklahoma, southwestern Kansas and the Texas Panhandle, and to a
lesser extent, in the Arkoma Basin of
 
                                       52
<PAGE>
   
southeastern Oklahoma ("Arkoma Basin"), and in southern Illinois. At December
31, 1997, the Company's estimated proved reserves in the Mid-Continent totaled
10.6 MMBoe, representing 37.4% of the Company's PV-10 at such date, on a pro
forma basis, and 97% of these reserves were proved developed. At such date,
approximately 70% of the Company's estimated proved reserves in the
Mid-Continent were natural gas. Net daily production from these properties
during the first half of 1998 averaged 1,126 Bbls of oil and 14,310 Mcf of
natural gas, or 3,511 Boe to the Company's interests. The Company's
Mid-Continent leasehold position includes 64,536 net developed and 9,282 net
undeveloped acres, representing 11% and 2% of the Company's total pro forma
leasehold, respectively, at June 30, 1998.
    
 
    As of June 30, 1998, the Company's Mid-Continent properties included an
inventory of 21 development drilling locations, 11 of which were in the Anadarko
Basin.
 
   
    ANADARKO BASIN.  The Anadarko Basin properties contained 95% of the
Company's estimated proved reserves for the Mid-Continent and 35.6% of the
Company's total PV-10 at December 31, 1997, on a pro forma basis, and at such
date, represented 53% of the Company's estimated proved reserves of natural gas.
During the six months ended June 30, 1998, net daily production from its
Anadarko Basin properties averaged 1,126 Bbls of oil and 13,253 Mcf of natural
gas, or 3,335 Boe to the Company's interest from 661 gross (407 net) producing
wells, 506 of which are operated by the Company. The Anadarko Basin wells
produce from a variety of sands and carbonates in both stratigraphic and
structural traps in the Arbuckle, Oil Creek, Viola, Mississippian, Springer,
Morrow, Red Ford, Oswego, Skinner and Tonkawa formations, at depths ranging from
6,000 to 12,000 feet. These properties are currently being re-evaluated for
further development drilling and workover potential.
    
 
    OTHER MID-CONTINENT PROPERTIES.  The Company's remaining Mid-Continent
properties include those located in the Arkoma Basin and in southern Illinois.
In the Arkoma Basin, the Company is focused on coal bed methane, where it owns
approximately 14,000 acres and has 43 producing wells from the Hartshorne coal
at depths of 2,500 to 3,500 feet. The Company plans to drill two pilot
horizontal tests in the coal in 1998. In Illinois, the Company participates with
another operator in two waterflood projects and up to three wells per year for
production from shallow Mississippian age sands and carbonates.
 
                                       53
<PAGE>
NET PRODUCTION, UNIT PRICES AND COSTS
 
    The following table presents certain information with respect to oil and gas
production, prices and costs attributable to all oil and gas property interests
owned by the Company for the periods shown:
   
<TABLE>
<CAPTION>
                                                                                                       SIX MONTHS ENDED
                                                       YEAR ENDED DECEMBER 31,                             JUNE 30,
                                  -----------------------------------------------------------------  --------------------
                                                                         WORLAND            PRO
                                                                    FIELD PROPERTIES       FORMA
                                    1995       1996       1997            1997            1997(1)      1997       1998
                                  ---------  ---------  ---------  -------------------  -----------  ---------  ---------
<S>                               <C>        <C>        <C>        <C>                  <C>          <C>        <C>
NET PRODUCTION DATA:
Oil and condensate (MBbls)......      1,199      2,888      3,518             628            4,146       1,615      1,983
Natural gas (MMcf)..............      5,880      6,527      5,789             610            6,399       2,881      2,933
Total (MBoe)....................      2,179      3,976      4,483             730            5,213       2,095      2,472
 
UNIT ECONOMICS
Average sales price per Bbl.....  $   17.11  $   20.78  $   18.61       $   15.58        $   18.14   $   20.08  $   13.14
Average sales price per Mcf.....       1.40       2.13       2.21             .22             2.03        2.33       1.79
Average equivalent price (per
  Boe)(2).......................      14.03      18.87      17.53           13.69            17.02       18.69      12.46
Lifting cost (per Boe)(3).......       3.49       4.86       4.63            7.04             4.98        5.07       3.67
DD&A expense (per Boe)(3).......       3.76       5.44       6.74            1.51             6.01        7.31       5.95
General and administrative
  expense (per Boe)(4)..........       2.74       1.64       1.47          --                 1.26        1.04       1.58
                                  ---------  ---------  ---------          ------       -----------  ---------  ---------
Gross margin....................  $    4.04  $    6.93  $    4.69       $    5.14        $    4.77   $    5.26  $    1.46
                                  ---------  ---------  ---------          ------       -----------  ---------  ---------
                                  ---------  ---------  ---------          ------       -----------  ---------  ---------
 
<CAPTION>
 
                                         WORLAND             PRO
                                    FIELD PROPERTIES        FORMA
                                          1998             1998(1)
                                  ---------------------  -----------
<S>                               <C>                    <C>
NET PRODUCTION DATA:
Oil and condensate (MBbls)......              261             2,244
Natural gas (MMcf)..............              380             3,314
Total (MBoe)....................              324             2,796
UNIT ECONOMICS
Average sales price per Bbl.....        $    7.22         $   12.45
Average sales price per Mcf.....              .64              1.66
Average equivalent price (per
  Boe)(2).......................             6.56             11.95
Lifting cost (per Boe)(3).......             3.05              3.60
DD&A expense (per Boe)(3).......             3.16              5.62
General and administrative
  expense (per Boe)(4)..........           --                  1.40
                                            -----        -----------
Gross margin....................        $     .35         $    1.83
                                            -----        -----------
                                            -----        -----------
</TABLE>
    
 
- --------------------------
 
(1) Pro forma to reflect the Worland Field Acquisition as if it had occurred
    January 1, 1997.
 
(2) Calculated by dividing oil and gas revenues, as reflected on the Financial
    Statements, by production volumes on a Boe basis. Oil and gas revenues
    reflected in the Financial Statements are recognized as production is sold
    and may differ from oil and gas revenues reflected on the Company's
    production records which reflect oil and gas revenues by date of production.
    See "Management's Discussion and Analysis of Financial Condition and Results
    of Operations."
 
(3) Related to drilling and development activities.
 
(4) Related to drilling and development activities, net of operating overhead
    income.
 
                                       54
<PAGE>
PRODUCING WELLS
 
   
    The following table sets forth the number of productive wells in which the
Company owned an interest as of June 30, 1998:
    
 
   
<TABLE>
<CAPTION>
                                                                                            OIL                NATURAL GAS
                                                                                    --------------------  ----------------------
                                                                                      GROSS       NET        GROSS        NET
                                                                                    ---------     ---     -----------     ---
<S>                                                                                 <C>        <C>        <C>          <C>
ROCKY MOUNTAINS:
  Williston Basin.................................................................        328        255           -           -
  Big Horn Basin(1)...............................................................        292        127           -           -
MID-CONTINENT:
  Anadarko Basin..................................................................        424        298         237         109
  Other...........................................................................         70         32          38          32
GULF COAST........................................................................          6          3           4           2
                                                                                    ---------        ---         ---         ---
    Total.........................................................................      1,120        715         279         143
                                                                                    ---------        ---         ---         ---
                                                                                    ---------        ---         ---         ---
</TABLE>
    
 
- ------------------------
 
   
(1) Represents Worland Field properties acquired by the Company in the Worland
    Field Acquisition.
    
 
ACREAGE
 
   
    The following table sets forth the Company's developed and undeveloped gross
and net leasehold acreage as of June 30, 1998:
    
 
   
<TABLE>
<CAPTION>
                                                                            DEVELOPED            UNDEVELOPED
                                                                       --------------------  --------------------
                                                                         GROSS       NET       GROSS       NET
                                                                       ---------  ---------  ---------  ---------
<S>                                                                    <C>        <C>        <C>        <C>
ROCKY MOUNTAINS:
  Williston Basin....................................................    164,137    124,079    454,342    340,487
  Big Horn Basin(1)..................................................     47,492     22,753     25,269     12,635
MID-CONTINENT:
  Anadarko Basin.....................................................     80,977     49,991     11,703      5,382
  Other..............................................................     21,539     14,545      5,026      3,900
GULF COAST...........................................................      1,355      1,235     12,217      8,202
                                                                       ---------  ---------  ---------  ---------
    Total............................................................    315,500    212,603    508,557    370,606
                                                                       ---------  ---------  ---------  ---------
                                                                       ---------  ---------  ---------  ---------
</TABLE>
    
 
- ------------------------
 
   
(1) Represents Worland Field properties acquired by the Company in the Worland
    Field Acquisition.
    
 
DRILLING ACTIVITIES
 
    The following table sets forth the Company's drilling activity on its
properties for the periods indicated:
   
<TABLE>
<CAPTION>
                                                                         YEAR ENDED DECEMBER 31,
                                                  ----------------------------------------------------------------------
                                                           1995                    1996                    1997
                                                  ----------------------  ----------------------  ----------------------
                                                     GROSS        NET        GROSS        NET        GROSS        NET
                                                  -----------  ---------  -----------  ---------  -----------  ---------
<S>                                               <C>          <C>        <C>          <C>        <C>          <C>
DEVELOPMENT WELLS:
  Productive....................................          19       14.50          49       28.43          63       42.41
  Non-productive................................           1        1.00           2        1.48       -           -
                                                          --                      --                      --
                                                               ---------               ---------               ---------
    Total.......................................          20        15.5          51       29.91          63       42.41
                                                          --                      --                      --
                                                          --                      --                      --
                                                               ---------               ---------               ---------
                                                               ---------               ---------               ---------
EXPLORATORY WELLS:
  Productive....................................          20       18.15           8        5.13          15       11.29
  Non-productive................................           4        3.00           5        3.17           5        1.98
                                                          --                      --                      --
                                                               ---------               ---------               ---------
    Total.......................................          24       21.15          13        8.30          20       13.27
                                                          --                      --                      --
                                                          --                      --                      --
                                                               ---------               ---------               ---------
                                                               ---------               ---------               ---------
 
<CAPTION>
 
                                                     SIX MONTHS ENDED
 
                                                      JUNE 30, 1998
                                                  ----------------------
                                                     GROSS        NET
                                                  -----------  ---------
<S>                                               <C>          <C>
DEVELOPMENT WELLS:
  Productive....................................          23       16.04
  Non-productive................................       -           -
                                                          --
                                                               ---------
    Total.......................................          23       16.04
                                                          --
                                                          --
                                                               ---------
                                                               ---------
EXPLORATORY WELLS:
  Productive....................................           2         .75
  Non-productive................................       -           -
                                                          --
                                                               ---------
    Total.......................................           2         .75
                                                          --
                                                          --
                                                               ---------
                                                               ---------
</TABLE>
    
 
                                       55
<PAGE>
OIL AND GAS RESERVES
 
    The following table summarizes the estimates of the Company's net proved
reserves and the related PV-10 of such reserves at the dates shown. Ryder Scott
Company Petroleum Engineers ("Ryder Scott") prepared the reserve and present
value data with respect to the Company's oil and gas properties which
represented 72% of the PV-10 at December 31, 1997 and Worland Field properties
which represented 77% of the PV-10 of the Worland Field properties at the same
date. The Company prepared the reserve and present value data on all other
Company and Worland Field properties.
 
   
<TABLE>
<CAPTION>
                                                                               AS OF DECEMBER 31,
                                                                -------------------------------------------------
                                                                                                       PRO FORMA
                                                                    1995          1996        1997      1997(1)
                                                                -------------  ----------  ----------  ----------
                                                                             (DOLLARS IN THOUSANDS)
<S>                                                             <C>            <C>         <C>         <C>
RESERVE DATA:
  Proved developed reserves:
    Oil (MBbls)...............................................      12,627         15,265      19,411      30,819
    Natural gas (MMcf)........................................      52,588         49,082      47,676      60,394
      Total (MBoe)............................................      21,392         23,445      27,357      40,885
  Proved undeveloped reserves:
    Oil (MBbls)...............................................       4,874          4,227       5,308      21,148
    Natural gas (MMcf)........................................       2,232          1,453       1,702      17,454
      Total (MBoe)............................................       5,246          4,469       5,592      24,057
  Total proved reserves:
    Oil (MBbls)...............................................      17,501         19,492      24,719      51,967
    Natural gas (MMcf)........................................      54,820         50,535      49,378      77,848
      Total (MBoe)............................................      26,638         27,915      32,949      64,942
  PV-10(2)(3)(4)..............................................  $  206,650     $  258,278  $  241,625  $  267,016
</TABLE>
    
 
- --------------------------
 
(1) Pro forma to reflect the Worland Field Acquisition as if it had occurred on
    December 31, 1997.
 
   
(2) PV-10 represents the present value of estimated future net cash flows before
    income tax discounted at 10% using prices in effect at the end of the
    respective periods presented and including the effects of hedging
    activities. In accordance with applicable requirements of the Commission,
    estimates of the Company's proved reserves and future net cash flows are
    made using oil and gas sales prices estimated to be in effect as of the date
    of such reserve estimates and are held constant throughout the life of the
    properties (except to the extent a contract specifically provides for
    escalation). The prices used in calculating PV-10 as of December 31, 1997
    were $18.06 per Bbl of oil and $2.25 per Mcf of natural gas. The average
    prices used in calculating the pro forma PV-10 as of December 31, 1997 were
    $14.59 per Bbl of oil and $2.07 per Mcf of natural gas. Average prices as of
    September 30, 1998 were $12.95 per Bbl of oil and $1.66 per Mcf of natural
    gas. These prices, if applied to estimated proved reserves of the Company as
    of December 31, 1997, would result in a PV-10, on a pro forma basis, of
    $208.7 million at such date, as estimated by the Company.
    
 
(3) In 1996, the Company changed its fiscal year-end from May 31 to December 31.
    Because reports on a December 31 year-end basis prior to 1996 were not
    available, information as of December 31, 1995 was determined from the
    Company's production, drilling, acquisition and sale data as applied to its
    December 31, 1996 reserve report.
 
   
(4) At December 31, 1997, the standardized measure of discounted future net cash
    flows attributable to the Company's proved oil and gas reserves and those
    acquired in the Worland Field Acquisition, and on a pro forma basis to give
    effect to the Worland Field Acquisition, are as follows:
    
 
   
<TABLE>
<CAPTION>
                                                                        STANDARDIZED MEASURE OF
                                                                           FUTURE CASH FLOWS
                                                                        ------------------------
                                                                            (IN THOUSANDS OF
                                                                                DOLLARS)
<S>                                                                     <C>
Continental Resources, Inc. And Subsidiary............................         $  241,625
Worland Field Acquisition.............................................             25,391
                                                                                 --------
Pro Forma Combined Standardized Measure of Future Cash Flows..........         $  267,016
</TABLE>
    
 
   
    See Note 8 to the Company's Consolidated Financial Statement and Note 2 to
    the Statements of Revenues and Direct Operating Expenses of Oil and Gas
    Properties Initiated in the Purchase Agreement between Continental
    Resources, Inc. and Bass Enterprises Production Co.
    
 
                                       56
<PAGE>
    Estimated quantities of proved reserves and future net cash flows therefrom
are affected by oil and gas prices, which have fluctuated widely in recent
years. There are numerous uncertainties inherent in estimating oil and gas
reserves and their values, including many factors beyond the control of the
producer. The reserve data set forth in this Prospectus represent only
estimates. Reservoir engineering is a subjective process of estimating
underground accumulations of oil and gas that cannot be measured in an exact
manner. The accuracy of any reserve estimate is a function of the quality of
available data and of engineering and geological interpretation and judgment. As
a result, estimates of different engineers, including those used by the Company,
may vary. In addition, estimates of reserves are subject to revision based upon
actual production, results of future development and exploration activities,
prevailing oil and gas prices, operating costs and other factors, which
revisions may be material. Accordingly, reserve estimates are often different
from the quantities of oil and gas that are ultimately recovered. The
meaningfulness of such estimates is highly dependent upon the accuracy of the
assumptions upon which they are based.
 
    In general, the volume of production from oil and gas properties declines as
reserves are depleted. Except to the extent the Company acquires properties
containing proved reserves or conducts successful exploitation and development
activities, the proved reserves of the Company will decline as reserves are
produced. The Company's future oil and gas production is, therefore, highly
dependent upon its level of success in finding or acquiring additional reserves.
See "Risk Factors--Replacement of Reserves" and "--Uncertainty of Estimates of
Oil and Gas Reserves and Future Net Cash Flows."
 
GAS GATHERING SYSTEMS
 
    The Company's gas gathering systems are owned by CGI. Natural gas and
casinghead gas are purchased at the wellhead primarily under either
market-sensitive percent-of-proceeds-index contracts or keep-whole gas purchase
contracts. Under percent-of-proceeds-index contracts, CGI receives a fixed
percentage of the monthly index posted price for natural gas and a fixed
percentage of the resale price for natural gas liquids. CGI generally receives
between 20% and 30% of the posted index price for natural gas sales and from 20%
to 30% of the proceeds received from natural gas liquids sales. Under keep-whole
gas purchase contracts, CGI retains all natural gas liquids recovered by its
processing facilities and keeps the producers whole by returning to the
producers at the tailgate of its plants an amount of residue gas equal on a BTU
basis to the natural gas received at the plant inlet. The keep-whole component
of the contract permits the Company to benefit when the value of natural gas
liquids is greater as a liquid than as a portion of the residue gas stream.
 
OIL AND GAS MARKETING
 
    The Company's oil and gas production is sold primarily under market
sensitive or spot price contracts. The Company sells substantially all of its
casinghead gas to purchasers under varying percentage-of-proceeds contracts. By
the terms of these contracts, the Company receives a fixed percentage of the
resale price received by the purchaser for sales of natural gas and natural gas
liquids recovered after gathering and processing the Company's gas. The Company
normally receives between 80% and 100% of the proceeds from natural gas sales
and from 80% to 100% of the proceeds from natural gas liquids sales received by
the Company's purchasers when the products are resold. The natural gas and
natural gas liquids sold by these purchasers are sold primarily based on spot
market prices. The revenues received by the Company from the sale of natural gas
liquids is included in natural gas sales. As a result of the natural gas liquids
contained in the Company's production, the Company has historically improved its
price realization on its natural gas sales as compared to Henry Hub or other
natural gas price indexes. For the year ended December 31, 1997, purchases of
the Company's natural gas production by GPM Gas Corporation, Warren NGL, Inc.,
and Oklahoma Natural Gas Company accounted for 14.7%, 12.7% and 12.6% of the
Company's total gas sales for such period, respectively. For the year ended
December 31, 1997, purchases of the Company's oil production by Koch Oil Company
and Sun Oil Company accounted
 
                                       57
<PAGE>
for 74.2% and 10.0% of the Company's total oil sales for such period. Due to the
availability of other markets, the Company does not believe that the loss of
Koch Oil Company or any other crude oil or gas customer would have a material
adverse effect on the Company's results of operations.
 
   
    Periodically the Company utilizes various hedging strategies to hedge the
price of a portion of its future oil and gas production. The Company does not
establish hedges in excess of its expected production. These strategies
customarily emphasize forward-sale, fixed-price contracts for physical delivery
of a specified quantity of production or swap arrangements that establish an
index-related price above which the Company pays the hedging partner and below
which the Company is paid by the hedging partner. These contracts allow the
Company to predict with greater certainty the effective oil and gas prices to be
received for its hedged production and benefit the Company when market prices
are less than the fixed prices provided in its forward-sale contracts. However,
the Company does not benefit from market prices that are higher than the fixed
prices in such contracts for its hedged production. As of June 30, 1998, no
forward-sale contracts were in place with respect to the Company's future
production of oil or natural gas. The Company plans to reduce its hedging
transactions. In August 1998, the Company began engaging in oil trading
arrangements as part of its oil marketing activities. Under these arrangements,
the Company contracts to purchase oil from one source and to sell oil to an
unrelated purchaser, usually at disparate prices. The Company realized gains on
these arrangements, determined before $.1 million of transportation costs and
related expenses, of $1.6 million for July, $1.2 million in August and $.8
million for September 1998. The Company's policy is to limit its exposure from
open positions to $1 million at any one time.
    
 
EMPLOYEES
 
   
    As of August 31, 1998, the Company employed 196 people, 77 of which were
administrative personnel, 14 of which were geological personnel, 11 of which
were engineers and the remainder were field personnel. The Company's future
success will depend partially on its ability to attract, retain and motivate
qualified personnel. The Company is not a party to any collective bargaining
agreements and has not experienced any strikes or work stoppages. The Company
considers its relations with its employees to be satisfactory.
    
 
COMPETITION
 
    The oil and gas industry is highly competitive. The Company competes for the
acquisition of oil and gas properties, primarily on the basis of the price to be
paid for such properties, with numerous entities including major oil companies,
other independent oil and gas concerns and individual producers and operators.
Many of these competitors are large, well established companies and have
financial and other resources substantially greater than those of the Company.
The Company's ability to acquire additional oil and gas properties and to
discover reserves in the future will depend upon its ability to evaluate and
select suitable properties and to consummate transactions in a highly
competitive environment.
 
LEGAL PROCEEDINGS
 
   
    From time to time, the Company is party to litigation or other legal
proceedings that it considers to be a part of the ordinary course of its
business. The Company is not involved in any legal proceedings nor is it party
to any pending or threatened claims that could reasonably be expected to have a
material adverse effect on its financial condition or results of operations.
However, the Company is engaged in litigation with Burlington with respect to
the agreement to exchange interests in the Cedar Hills Field. See "--Rocky
Mountains."
    
 
REGULATION
 
    GENERAL.  Various aspects of the Company's oil and gas operations are
subject to extensive and continually changing regulation, as legislation
affecting the oil and gas industry is under constant review for
 
                                       58
<PAGE>
amendment or expansion. Numerous departments and agencies, both federal and
state, are authorized by statute to issue, and have issued, rules and
regulations binding upon the oil and gas industry and its individual members.
 
    REGULATION OF SALES AND TRANSPORTATION OF NATURAL GAS.  The Federal Energy
Regulatory Commission (the "FERC") regulates the transportation and sale for
resale of natural gas in interstate commerce pursuant to the Natural Gas Act of
1938 and the Natural Gas Policy Act of 1978. In the past, the federal government
has regulated the prices at which oil and gas could be sold. While sales by
producers of natural gas and all sales of crude oil, condensate and natural gas
liquids can currently be made at uncontrolled market prices, Congress could
reenact price controls in the future. The Company's sales of natural gas are
affected by the availability, terms and cost of transportation. The price and
terms for access to pipeline transportation are subject to extensive regulation
and proposed regulation designed to increase competition within the natural gas
industry, to remove various barriers and practices that historically limited
non-pipeline natural gas sellers, including producers, from effectively
competing with interstate pipelines for sales to local distribution companies
and large industrial and commercial customers and to establish the rates
interstate pipelines may charge for their services. Similarly, the Oklahoma
Corporation Commission and the Texas Railroad Commission have been reviewing
changes to their regulations governing transportation and gathering services
provided by intrastate pipelines and gatherers. While the changes being
considered by these federal and state regulators would affect the Company only
indirectly, they are intended to further enhance competition in natural gas
markets. The Company cannot predict what further action the FERC or state
regulators will take on these matters, however, the Company does not believe
that any actions taken will have an effect materially different than the effect
on other natural gas producers with which it competes.
 
    Additional proposals and proceedings that might affect the natural gas
industry are pending before Congress, the FERC, state commissions and the
courts. The natural gas industry historically has been very heavily regulated;
therefore, there is no assurance that the less stringent regulatory approach
recently pursued by the FERC and Congress will continue.
 
    OIL PRICE CONTROLS AND TRANSPORTATION RATES.  Sales of crude oil, condensate
and gas liquids by the Company are not currently regulated and are made at
market prices. The price the Company receives from the sale of these products
may be affected by the cost of transporting the products to market.
 
    ENVIRONMENTAL.  Extensive federal, state and local laws regulating the
discharge of materials into the environment or otherwise relating to the
protection of the environment affect the Company's oil and gas operations.
Numerous governmental departments issue rules and regulations to implement and
enforce such laws, which are often difficult and costly to comply with and which
carry substantial civil and even criminal penalties for failure to comply. Some
laws, rules and regulations relating to protection of the environment may, in
certain circumstances, impose strict liability for environmental contamination,
rendering a person or entity liable for environmental damages and cleanup costs
without regard to negligence or fault on the part of such person or entity.
Other laws, rules and regulations may restrict the rate of oil and gas
production below the rate that would otherwise exist or even prohibit
exploration and production activities in sensitive areas. In addition, state
laws often require various forms of remedial action to prevent pollution, such
as closure of inactive pits and plugging of abandoned wells. The regulatory
burden on the oil and gas industry increases the Company's cost of doing
business and consequently affects the Company's profitability. The Company
believes that it is in substantial compliance with current applicable
environmental laws and regulations and that continued compliance with existing
requirements will not have a material adverse impact on the Company's
operations. However, environmental laws and regulations have been subject to
frequent changes over the years, and the imposition of more stringent
requirements could have a material adverse effect upon the capital expenditures
or competitive position of the Company.
 
                                       59
<PAGE>
    The Company currently owns or leases, and has in the past owned or leased,
numerous properties that have been used for the exploration and production of
oil and gas and for other uses associated with the oil and gas industry.
Although the Company followed operating and disposal practices that it
considered appropriate under applicable laws and regulations, hydrocarbons or
other wastes may have been disposed of or released on or under the properties
owned or leased by the Company or on or under other locations where such wastes
were taken for disposal. In addition, the Company owns or leases properties that
have been operated by third parties in the past. The Company could incur
liability under the Comprehensive Environmental Response, Compensation and
Liability Act or comparable state statutes for contamination caused by wastes it
generated or for contamination existing on properties it owns or leases, even if
the contamination was caused by the waste disposal practices of the prior owners
or operators of the properties. In addition, it is not uncommon for landowners
and other third parties to file claims for personal injury and property damage
allegedly caused by the release of produced fluids or other pollutants into the
environment.
 
    The Federal Solid Waste Disposal Act, as amended by the Resource
Conservation and Recovery Act of 1976 ("RCRA"), regulates the generation,
transportation, storage, treatment and disposal of hazardous wastes and can
require cleanup of hazardous waste disposal sites. RCRA currently excludes
drilling fluids, produced waters and certain other wastes associated with the
exploration, development or production of oil and gas from regulation as
"hazardous waste." A similar exemption is contained in many of the state
counterparts to RCRA. Disposal of such oil and gas exploration, development and
production wastes usually is regulated by state law. Other wastes handled at
exploration and production sites or used in the course of providing well
services may not fall within this exclusion. Moreover, stricter standards for
waste handling and disposal may be imposed on the oil and gas industry in the
future. From time to time legislation has been proposed in Congress that would
revoke or alter the current exclusion of exploration, development and production
wastes from the RCRA definition of "hazardous wastes" thereby potentially
subjecting such wastes to more stringent handling and disposal requirements. If
such legislation were enacted, or if changes to applicable state regulations
required the wastes to be managed as hazardous wastes, it could have a
significant impact on the operating costs of the Company, as well as the oil and
gas industry in general.
 
    The Company's operations are also subject to the Clean Air Act (the "CAA")
and comparable state and local requirements. Amendments to the CAA were adopted
in 1990 and contain provisions that may result in the gradual imposition of
certain pollution control requirements with respect to air emissions from
operations of the Company. The Company may be required to incur certain capital
expenditures in the next several years for air pollution control equipment in
connection with obtaining and maintaining operating permits and approvals for
air emissions. However, the Company believes its operations will not be
materially adversely affected by any such requirements, and the requirements are
not expected to be any more burdensome to the Company than to other similarly
situated companies involved in oil and gas exploration and production activities
or well servicing activities.
 
    The Federal Water Pollution Control Act of 1972 (the "FWPCA") imposes
restrictions and strict controls regarding the discharge of wastes, including
produced waters and other oil and gas wastes, into navigable waters. These
controls have become more stringent over the years, and it is probable that
additional restrictions will be imposed in the future. Permits must be obtained
to discharge pollutants into state and federal waters. The FWPCA provides for
civil, criminal and administrative penalties for unauthorized discharges of oil
and other hazardous substances and imposes substantial potential liability for
the costs of removal or remediation. State laws governing discharges to water
also provide varying civil, criminal and administrative penalties and impose
liabilities in the case of a discharge of petroleum or its derivatives, or other
hazardous substances, into state waters. In addition, the Environmental
Protection Agency has promulgated regulations that require many oil and gas
production sites, as well as other facilities, to obtain permits to discharge
storm water runoff. The Company believes that compliance with
 
                                       60
<PAGE>
existing requirements under the FWPCA and comparable state statutes will not
have a material adverse effect on the Company's financial condition or results
of operations.
 
    REGULATION OF OIL AND GAS EXPLORATION AND PRODUCTION.  Exploration and
production operations of the Company are subject to various types of regulation
at the federal, state and local levels. Such regulations include requiring
permits and drilling bonds for the drilling of wells, regulating the location of
wells, the method of drilling and casing wells, and the surface use and
restoration of properties upon which wells are drilled. Many states also have
statutes or regulations addressing conservation matters, including provisions
for the utilization or pooling of oil and gas properties, the establishment of
maximum rates of production from oil and gas wells and the regulation of
spacing, plugging and abandonment of such wells. Some state statutes limit the
rate at which oil and gas can be produced from the Company's properties. See
"Risk Factors--Laws and Regulations; Environmental Risk."
 
TITLE TO PROPERTIES
 
    The Company believes it has satisfactory title to all of its properties in
accordance with standards generally accepted in the oil and gas industry. As is
customary in the oil and gas industry, the Company makes only a cursory review
of title to farmout acreage and to undeveloped oil and gas leases upon execution
of any contracts. Prior to the commencement of drilling operations, a title
examination is conducted and curative work is performed with respect to
significant defects. To the extent title opinions or other investigations
reflect title defects, the Company, rather than the seller of the undeveloped
property, is typically responsible to cure any such title defects at its
expense. If the Company were unable to remedy or cure any title defect of a
nature such that it would not be prudent to commence drilling operations on the
property, the Company could suffer a loss of its entire investment in the
property. The Company has obtained title opinions on substantially all of its
producing properties. Prior to completing an acquisition of producing oil and
gas leases, the Company performs a title review on a material portion of the
leases. The Company's oil and gas properties are subject to customary royalty
interests, liens for current taxes and other burdens that the Company believes
do not materially interfere with the use of or affect the value of such
properties.
 
                                       61
<PAGE>
                                   MANAGEMENT
 
DIRECTORS AND EXECUTIVE OFFICERS
 
    The following table sets forth names, ages and titles of the directors and
executive officers of the Company.
 
   
<TABLE>
<CAPTION>
NAME                                 AGE      POSITION
- -------------------------------      ---      --------------------------------------------------------------------------
<S>                              <C>          <C>
Harold Hamm(1)(2)..............          52   Chairman of the Board of Directors, President, Chief Executive Officer and
                                              Director
 
Jack Stark(1)(3)...............          43   Senior Vice President--Exploration and Director
 
Jeff Hume(1)(4)................          48   Senior Vice President--Drilling Operations and Director
 
Randy Moeder(1)(2).............          39   Senior Vice President, General Counsel, Secretary and Director
 
Roger Clement(1)(3)............          53   Senior Vice President, Chief Financial Officer, Treasurer and Director
 
Tom Luttrell...................          40   Senior Vice President--Land
 
Jeff White.....................          32   Senior Vice President--Business Development
</TABLE>
    
 
- --------------------------
 
(1) Member of the Executive, Compensation and Audit Committees.
 
(2) Term expires in 2001.
 
(3) Term expires in 2000.
 
(4) Term expires in 1999.
 
    HAROLD HAMM, LL.M. has been President and Chief Executive Officer and a
Director of the Company since its inception in 1967. Mr. Hamm has served as
President of the Oklahoma Independent Petroleum Association Wildcatter's Club
since 1989. Mr. Hamm was the founder and is Chairman of the Oklahoma Natural Gas
Industry Task Force. Mr. Hamm has served as a member of the Interstate of Oil
and Gas Compact Commission and is a founding board member of the Oklahoma Energy
Resources Board. Mr. Hamm was named the 1992 Oklahoma Independent Petroleum
Association Member of the Year. Mr. Hamm serves on the Tax Steering Committee of
the Independent Petroleum Association of America and is a director of the Rocky
Mountain Oil and Gas Association.
 
    JACK STARK joined the Company as Vice President of Exploration in June 1992
and was promoted to Senior Vice President in May 1998. Mr. Stark has been a
Director of the Company since September 1996. He holds a Masters degree in
Geology from Colorado State University and has 20 years of exploration
experience in the Mid-Continent, Gulf Coast and Rocky Mountain regions. Prior to
joining the Company, Mr. Stark was the exploration manager for the Western
Mid-Continent Region for Pacific Enterprises from August 1988 to June 1992. From
1978 to 1988, he held various staff and middle management positions with Cities
Service Co. and TXO Production Corp. Mr. Stark is a member of the American
Association of Petroleum Geologists, Oklahoma Independent Petroleum Association,
Rocky Mountain Association of Geologists, Houston Geological Society and
Oklahoma Geological Society.
 
    JEFF HUME has been Vice President of Drilling Operations and a Director of
the Company since September 1996 and was promoted to Senior Vice President in
May, 1998. From May 1983 to September 1996, Mr. Hume was Vice President of
Engineering and Operations. Prior to joining the Company, Mr. Hume held various
engineering positions with Sun Oil Company, Monsanto Company and FCD Oil
Corporation. Mr. Hume is a Registered Professional Engineer and member of the
Society of Petroleum Engineers, Oklahoma Independent Petroleum Association, and
the Oklahoma and National Professional Engineering Societies.
 
    RANDY MOEDER has been Vice President, General Counsel and a Director of the
Company since November 1990 and has served as Secretary of the Company since
February 1994 and as President of
 
                                       62
<PAGE>
Continental Gas, Inc. since January 1995 and was Vice President of Continental
Gas, Inc. from November 1990 to January 1995. Mr. Moeder was promoted to Senior
Vice President of the Company in May, 1998. From January 1988 to summer 1990,
Mr. Moeder was in private law practice. From 1982 to 1988, Mr. Moeder held
various positions with Amoco Corporation. Mr. Moeder is a member of the Oklahoma
Independent Petroleum Association, the Oklahoma and American Bar Associations.
Mr. Moeder is also a Certified Public Accountant.
 
    ROGER CLEMENT became Vice President, Chief Financial Officer and Treasurer
and a Director of the Company in March 1989 and was promoted to Senior Vice
President in May, 1998. Prior to joining the Company, Mr. Clement was a partner
in the accounting firm of Hunter and Clement in Oklahoma City, Oklahoma. Mr.
Clement is a Certified Public Accountant.
 
    TOM LUTTRELL has been Vice President--Land of the Company since February
1997 and was promoted to Senior Vice President in May, 1998. From 1991 to
February 1997, Mr. Luttrell was Senior Landman of the Company. Prior to joining
the Company, Mr. Luttrell served as a landman for Terra Resources, Inc., Pacific
Enterprises Oil & Gas Company and Alexander Energy Corporation, all independent
oil and gas exploration companies. Mr. Luttrell is a member of the American
Association of Petroleum Landmen.
 
    JEFF WHITE has been Vice President--Business Development of the Company
since July 1996 and was promoted to Senior Vice President--Business Development
in May, 1998. From 1993 to July 1996, Mr. White served as Special Assistant to
the Chairman of the Federal Deposit Insurance Corporation and also served as a
Financial Analyst for the Federal Deposit Insurance Corporation. From July, 1990
to December, 1992, Mr. White served as a financial/budget analyst on issues
relating to Resolution Trust Corporation funding. Prior to 1990, Mr. White
served as an analyst to the Banking Committee of the House of Representatives.
 
COMPOSITION OF BOARD OF DIRECTORS
 
    The Company's Board of Directors presently consists of five directors.
Directors and executive officers of the Company are elected to serve until they
resign or are removed, or are otherwise disqualified to serve, or until their
successors are elected and qualified. Directors of the Company are elected for
one-year terms at the annual meeting of stockholders. Officers of the Company
are appointed at the Board's first meeting after each annual meeting of
stockholders.
 
DIRECTOR COMPENSATION
 
    Directors receive no additional compensation for services rendered as
directors but are reimbursed for any out-of-pocket expenses incurred in
attending meetings.
 
EXECUTIVE COMPENSATION
 
    The following table sets forth the cash and non-cash compensation during
1997 earned by the Company's chief executive officer and its other four most
highly compensated executive officers as of December 31, 1997 (the "Named
Executive Officers").
 
                                       63
<PAGE>
                           SUMMARY COMPENSATION TABLE
 
<TABLE>
<CAPTION>
                                                                                   SECURITIES
                                   ANNUAL COMPENSATION                             UNDERLYING
                               ---------------------------     OTHER ANNUAL       OPTION AWARDS       ALL OTHER
NAME AND PRINCIPAL POSITION      SALARY($)      BONUS($)    COMPENSATION($)(1)    (# OF SHARES)   COMPENSATION($)(2)
- -----------------------------  -------------  ------------  -------------------  ---------------  ------------------
<S>                            <C>            <C>           <C>                  <C>              <C>
Harold Hamm..................  $  187,506.00  $    --            $  --                 --            $     857.12
  Chairman of the Board,
    President, and Chief
    Executive Officer
 
Jack Stark...................     116,550.32     10,249.50          --                 --                9,815.92
  Senior Vice President--
    Exploration
 
Jeff Hume....................     113,350.64     10,249.50          --                 --               11,162.12
  Senior Vice President--
    Operations
 
Randy Moeder.................      90,743.18     10,436.86          --                 --               18,666.78
  Senior Vice President,
    General Counsel and
    Secretary
 
Roger Clement................      89,968.00      9,718.83          --                 --                3,118.72
  Senior Vice President,
    Chief Financial Officer
    and Treasurer
</TABLE>
 
- ------------------------
 
(1) Represents the value of perquisites and other personal benefits in excess of
    10% of annual salary and bonus for the year ended December 31, 1997, the
    Company paid no other annual compensation to its Named Executive Officers.
 
(2) Represents contributions made by the Company to the accounts of the
    executive officer under the Company's profit sharing plan and under the
    Company's nonqualified compensation plan.
 
COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION
 
    Continental does not have a separate compensation committee of its board of
directors. The board of directors sets the compensation for its executive
officers and Harold Hamm, Chairman of the Board and President, is a director and
participates in these deliberations concerning executive officer compensation.
Each of the directors of Continental also serve on the board of directors of
subsidiaries of Continential. As such, each of the directors participates in the
deliberations concerning executive officers' compensation for Continential and
its subsidiaries.
 
EMPLOYMENT AGREEMENTS
 
    The Company does not have any employment agreeements with its named
Executive Officers.
 
                                       64
<PAGE>
                 CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS
 
    Set forth below is a description of transactions entered into between the
Company and certain of its officers, directors, employees and stockholders since
January 1, 1995. Certain of these transactions will continue in the future and
may result in conflicts of interest between the Company and such individuals,
and there can be no assurance that conflicts of interest will always be resolved
in favor of the Company.
 
   
    OIL AND GAS OPERATIONS.  In its capacity as operator of certain oil and gas
properties, the Company obtains oilfield services from related companies,
including Hamm & Phillips Service Company, Stride Well Service Company, Oil Tool
Rentals, Inc. and Catworks, Inc. These services include leasehold acquisition,
well location, site construction and other well site services, saltwater
trucking, use of rigs for completion and workover of oil and gas wells and the
rental of oil field tools and equipment. Harold Hamm is the chief executive
officer and principal shareholder of each of these related companies. The
aggregate amounts paid by Continental to these related companies during 1995,
1996, 1997 and during the six months ended June 30, 1998 were $5.9 million, $5.9
million, $11.9 million, and $6.9 million, respectively. The total amount paid to
these affiliated companies, a portion of which is billed to other interest
owners, was approximately $11.9 million in 1997. The services discussed above
were provided at costs and upon terms that management believes are no less
favorable to the Company than could have been obtained from unrelated parties.
In addition, Harold Hamm and certain companies controlled by him own interests
in wells operated by the Company. At December 31, 1997 and June 30, 1998, the
Company owed such persons an aggregate of $200,000 and $100,000, respectively,
representing their shares of oil and gas production sold by the Company.
    
 
   
    SHAREHOLDER LOANS AND ADVANCES.  In 1997 and 1998, the Company obtained
loans and advances from Harold Hamm and certain of his affiliates. Such loans
and advances were unsecured and were repaid from time to time in varying
amounts, with interest at an annual rate of 8.25%. The maximum aggregate amount
of such loans and advances outstanding at any time during 1997 and during the
six months ended June 30, 1998 was $22.0 million and $    million, respectively.
See "Management's Discussion and Analysis of Financial Condition and Results of
Operations--Liquidity and Capital Resources."
    
 
   
    OFFICE LEASE.  The Company leases office space under operating leases
directly or indirectly from Harold Hamm and Continental Management Company,
L.L.C., a Company owned in part by Harold Hamm. In 1997, the Company paid rents
associated with these leases of approximately $294,000. The Company believes
that the terms of its lease are no less favorable to the Company than those
which would be obtained from unaffiliated parties
    
 
    PARTICIPATION IN WELLS.  Certain officers and directors of the Company have
participated and may participate in the future in wells drilled by the Company.
In 1997, Harold Hamm participated in Company wells on terms similar to those
available to unrelated third parties and was billed an aggregate of $515,000,
for his share of drilling, completion, equipping and operating costs. At
December 31, 1997, the aggregate unpaid balance owed to the Company by such
officers and directors was $4,565, none of which was past due.
 
   
    WORLAND FIELD.  Effective June 1, 1998, the Company sold an undivided 50%
interest in the 70,000 net leasehold acres it acquired in the Worland Field
Acquisition to its principal shareholder, Harold Hamm. The Worland Field sale
did not include inventory and certain items of equipment which the Company had
acquired in the Worland Field Acquisition. The $42.6 million purchase price paid
by Harold Hamm equals the Company's cost basis in such leasehold acres. Harold
Hamm paid $19.3 million of the purchase price in cash and the balance of $23.3
million by the cancellation of indebtedness owed by Harold Hamm to the Company.
Harold Hamm is subject to the applicable unit agreements in place with respect
to his interests in the Worland Field. Harold Hamm intends to sell some or all
of the interests acquired from the Company, although no arrangements,
understandings or agreements for any such sale currently exist.
    
 
                                       65
<PAGE>
                             PRINCIPAL SHAREHOLDERS
 
    Harold Hamm, Chairman of the Board, President and Chief Executive Officer
and a Director of the Company beneficially owns 44,496 shares (90.7%) of the
Company's outstanding common stock. The remaining 4,545 shares (9.3%) of the
outstanding common stock is beneficially owned by the Harold Hamm Delta Trust,
an irrevocable trust over which Harold Hamm has no voting or investment power.
 
                         DESCRIPTION OF CREDIT FACILITY
 
    The following summary of the Credit Facility does not purport to be complete
and is subject to, and qualified in its entirety by reference to, the Credit
Facility. Bank One, Oklahoma, N.A., as agent for the lenders under the Credit
Facility ("Agent"), has consented to the terms of the Indenture and the issuance
of the Notes.
 
   
    At August 31, 1998, $4.0 million was outstanding under the Credit Facility.
The Credit Facility is payable in full on May 14, 2001. All amounts outstanding
under the Credit Facility are secured by a first lien on substantially all of
the Company's proved oil and gas reserves, wells, systems, plants, related
personal property and contract rights.
    
 
    INTEREST AND FEES.  Amounts advanced under the Credit Facility bear interest
determined with reference to a sliding scale that takes into account the ratio
of the aggregate amount outstanding to the Borrowing Base (as defined in the
Credit Facility). The applicable rate may, at the Company's option, be based
either on the LIBOR rate or the Agent's prime rate. The rates range from the
LIBOR rate plus a margin of 100 to 175 basis points, or the Agent's prime rate
with no margin. The Company pays a non-use fee of 0.1875% to 0.25% per annum on
the amount by which the Borrowing Base exceeds the aggregate amount outstanding,
and an agency fee equal to $50,000 per annum.
 
    BORROWING BASE.  The amount of credit available at any time under the Credit
Facility is the lesser of the commitment amount or the Borrowing Base. The
commitment amount, initially, was $175.0 million. Upon completion of the
Offering and application of the net proceeds therefrom, the commitment amount
and the Borrowing Base was reduced to $75.0 million. The Borrowing Base is
redetermined semi-annually by the banks and may be redetermined more frequently
at the request of the Company, the Agent or banks holding 66 2/3% of the
outstanding balance under the Credit Facility. To the extent the amount
outstanding under the Credit Facility exceeds the Borrowing Base, the Company
must either reduce the amount outstanding or furnish additional collateral. At
June 30, 1998, the Borrowing Base was $175.0 million, which was more than the
amount outstanding under the Credit Facility at that date. The next scheduled
Borrowing Base redetermination date will be November 1, 1998.
 
    COVENANTS.  The Credit Facility contains customary affirmative and
restrictive covenants which, among other things, require periodic financial and
reserve reporting, require that the Company not allow the ratio of its
indebtedness to tangible net worth to exceed 3.25 to 1 as of the end of any
fiscal quarter, require that the Company not allow its minimum debt service
coverage ratio to be less than 1.2 to 1 as of the end of any fiscal quarter for
the immediately preceding four quarters, maintain a current ratio of at least
1.0 to 1 at the end of any fiscal quarter, and limit the Company and its
Restricted Subsidiaries with respect to indebtedness, liabilities, liens,
dividends, loans, lines of business, transactions with affiliates, changes in
management, investments, amendments to organizational documents, purchases and
sales of assets and speculative trading activities, unless the requisite number
of banks otherwise consent.
 
    EVENTS OF DEFAULT.  The Credit Facility contains customary events of
default, including, among other things and subject to applicable grace periods,
payment defaults, material misrepresentations, covenant defaults, certain
bankruptcy events, and judgment defaults. It also is an event of default under
the Credit Facility if any indebtedness of the Company or the Restricted
Subsidiaries in excess of $250,000, including the Notes, is accelerated or if a
change in management occurs.
 
                                       66
<PAGE>
                              DESCRIPTION OF NOTES
 
GENERAL
 
    The Old Notes were issued pursuant to the Indenture among the Company, the
Subsidiary Guarantors and United States Trust Company of New York, as trustee
(the "Trustee"). The New Notes will be issued under the Indenture, which will be
subject to the Trust Indenture Act of 1939, as amended (the "Trust Indenture
Act"). As used herein the term "Notes" includes the Old Notes and the New Notes.
The terms of the Notes include those stated in the Indenture and those made part
of the Indenture by reference to the Trust Indenture Act. The Notes are subject
to all such terms, and Holders of the Notes are referred to the Indenture and
the Trust Indenture Act for a statement thereof. The following summary of
certain provisions of the Indenture does not purport to be complete and is
qualified in its entirety by reference to the Indenture, including the
definitions therein of certain terms used below. The definitions of certain
terms used in the following summary are set forth below under "--Certain
Definitions."
 
    The Notes will be general unsecured obligations of the Company and will be
subordinated in right of payment to Senior Debt. The Notes will be guaranteed on
a senior subordinated basis by each Restricted Subsidiary of the Company and any
future Restricted Subsidiary of the Company. The obligations of the Subsidiary
Guarantors under the Subsidiary Guarantees will be general unsecured obligations
of each of the Subsidiary Guarantors and will be subordinated in right of
payment to all obligations of the Subsidiary Guarantors in respect of Guarantor
Senior Debt. See "--Subsidiary Guarantees" and "Risk Factors-- Subordination of
Notes and Guarantees."
 
    For purposes of this section, the term "Company" means Continental
Resources, Inc. As of the date of the Indenture, all of the Company's
Subsidiaries will be Restricted Subsidiaries. Under certain circumstances,
however, the Company will be able to designate current and future Subsidiaries
as Unrestricted Subsidiaries. Unrestricted Subsidiaries will not be subject to
many of the restrictive covenants set forth in the Indenture. See "--Certain
Covenants."
 
TERMS OF THE NOTES
 
    The Notes are limited in aggregate principal amount to $150 million and will
mature on August 1, 2008. Interest on the Notes will accrue at the rate of
10 1/4% per annum and will be payable semi-annually in arrears on February 1 and
August 1 of each year, commencing February 1, 1999, to Holders of the Notes of
record on the immediately preceding January 15 and July 15. Interest on the
Notes will accrue from the most recent date on which interest has been paid or,
if no interest has been paid, from the date of original issuance.
 
    Interest will be computed on the basis of a 360-day year comprised of twelve
30-day months. Principal, premium, if any, and interest on the Notes will be
payable at the office or agency of the Company maintained for such purpose
within the City and State of New York or, at the option of the Company, payment
of interest may be made by check mailed to the Holders of the Notes at their
respective addresses set forth in the applicable register of Holders of the
Notes. Until otherwise designated by the Company, the Company's office or agency
in New York will be the office of the Trustee maintained for such purpose. The
Notes will be fully registered as to principal and interest in minimum
denominations of $1,000 and integral multiples of $1,000 in excess thereof.
 
OPTIONAL REDEMPTION
 
    Except as otherwise described below, the Notes will not be redeemable at the
Company's option prior to August 1, 2003. Thereafter, the Notes will be subject
to redemption at the option of the Company, in whole or in part, upon not less
than 30 nor more than 60 days' notice, at the redemption prices (expressed as
percentages of principal amount) set forth below plus accrued and unpaid
interest thereon to the
 
                                       67
<PAGE>
applicable redemption date, if redeemed during the twelve-month period beginning
on August 1 of the years indicated below:
 
<TABLE>
<CAPTION>
YEAR                                                                                PERCENTAGE
- ----------------------------------------------------------------------------------  -----------
<S>                                                                                 <C>
2003..............................................................................     105.125%
2004..............................................................................     103.417%
2005..............................................................................     101.708%
2006 and thereafter...............................................................     100.000%
</TABLE>
 
    Prior to August 1, 2001, the Company may, at its option, on any one or more
occasions, redeem up to 35% of the original aggregate principal amount of the
Notes at a redemption price equal to 110.25% of the principal amount thereof,
plus accrued and unpaid interest, if any, thereon to the redemption date, with
all or a portion of the net proceeds of public sales of common stock of the
Company; PROVIDED that at least 65% of the original aggregate principal amount
of the Notes remains outstanding immediately after the occurrence of such
redemption; and PROVIDED, FURTHER, that such redemption shall occur within 60
days of the date of the closing of the related sale of common stock of the
Company.
 
    At any time on or prior to August 1, 2003, the Notes may also be redeemed as
a whole at the option of the Company upon the occurrence of a Change of Control
(but in no event more than 90 days after the occurrence of such Change of
Control) at a redemption price equal to 100% of the principal amount thereof,
plus the Applicable Premium as of, and accrued but unpaid interest, if any, to,
the date of redemption (subject to the right of Holders of record on the
relevant record date to receive interest due on the relevant interest payment
date).
 
SELECTION AND NOTICE
 
    In the case of any partial redemption, selection of the Notes for redemption
will be made by the Trustee in compliance with the requirements of the principal
national securities exchange, if any, on which the Notes are listed, or, if such
other Notes are not so listed, on a pro rata basis, by lot or by such method as
such Trustee shall deem fair and appropriate; PROVIDED that no Note of $1,000 or
less shall be redeemed in part. Notices of redemption shall be mailed by first
class mail at least 30 but not more than 60 days before the redemption date to
each Holder of the Notes to be redeemed at its registered address. If any Note
is to be redeemed in part only, the notice of redemption that relates to such
Note shall state the portion of the principal amount thereof to be redeemed. A
new Note in principal amount equal to the unredeemed portion thereof will be
issued in the name of the Holder thereof upon cancellation of the original Note.
On and after the redemption date, interest will cease to accrue on the Notes or
portions of them called for redemption unless the Company defaults in payment of
the redemption price.
 
RANKING AND SUBORDINATION
 
    The payment of principal of, premium, if any, and interest on the Notes and
any other payment obligations of the Company in respect of the Notes (including
any obligation to repurchase the Notes) will be subordinated in right of
payment, as set forth in the Indenture, to the prior payment in full in cash of
all Senior Debt, whether outstanding on the date of the Indenture or thereafter
incurred.
 
    Upon any payment or distribution of property or securities to creditors of
the Company in a liquidation or dissolution of the Company or in a bankruptcy,
reorganization, insolvency, receivership or similar proceeding relating to the
Company or its property, or in an assignment for the benefit of creditors or any
marshalling of the Company's assets and liabilities, the holders of Senior Debt
will be entitled to receive payment in full of all Obligations due in respect of
such Senior Debt (including interest after the commencement of any such
proceeding at the rate specified in the applicable Senior Debt, whether or not a
claim for such interest would be allowed in a proceeding) before the Holders of
the Notes will be entitled to receive any payment with respect to the Notes, and
until all Obligations with respect to Senior Debt are
 
                                       68
<PAGE>
paid in full, any distribution to which the Holders of the Notes would be
entitled shall be made to the holders of Senior Debt (except that Holders of the
Notes may receive payments made from the trust described under "--Legal
Defeasance and Covenant Defeasance").
 
    The Company also may not make any payment (whether by redemption, purchase,
retirement, defeasance or otherwise) upon or in respect of the Notes (except
from the trust described under "--Legal Defeasance and Covenant Defeasance") if
(i) a default in the payment of the principal of, premium, if any, or interest
on Designated Senior Debt occurs ("payment default") or (ii) any other default
occurs and is continuing with respect to Designated Senior Debt that permits, or
with the giving of notice or passage of time or both (unless cured or waived)
will permit, holders of the Designated Senior Debt as to which such default
relates to accelerate its maturity ("nonpayment default") and (solely with
respect to this clause (ii)) the Trustee receives a notice of such default (a
"Payment Blockage Notice") from the Company or the holders (or their
representative) of any Designated Senior Debt. Cash payments on the Notes shall
be resumed (a) in the case of a payment default, upon the date on which such
default is cured or waived and (b) in case of a nonpayment default, the earlier
of the date on which such nonpayment default is cured or waived or 179 days
after the date on which the applicable Payment Blockage Notice is received,
unless the maturity of any Designated Senior Debt has been accelerated or a
default of the type described in clause (ix) under the caption "Events of
Default and Remedies" has occurred and is continuing. No new period of payment
blockage may be commenced unless and until 360 days have elapsed since the date
of commencement of the payment blockage period resulting from the immediately
prior Payment Blockage Notice. No nonpayment default in respect of Designated
Senior Debt that existed or was continuing on the date of delivery of any
Payment Blockage Notice to the Trustee shall be, or be made, the basis for a
subsequent Payment Blockage Notice unless such default shall have been cured or
waived for a period of no less than 90 days.
 
    The Indenture further requires that the Company promptly notify holders of
Senior Debt if payment of the Notes is accelerated because of an Event of
Default.
 
    As a result of the subordination provisions described above, in the event of
a liquidation or insolvency of the Company, Holders of the Notes may recover
less ratably than creditors of the Company who are holders of Senior Debt. As of
March 31, 1998, on a pro forma basis, after giving effect to the Worland Field
Acquisition and the related financings and the application of the net proceeds
from the Offering, (i) the principal amount of Senior Debt outstanding would
have been $3.9 million (exclusive of $75 million of unused commitments under the
Credit Facility), (ii) there would have been no Senior Subordinated Debt of the
Company outstanding (exclusive of the Notes) and (iii) the Subsidiary Guarantors
would have had no Indebtedness outstanding other than guarantees of the Credit
Facility and the Subsidiary Guarantees. The Indenture will limit, subject to
certain financial tests, the amount of additional Indebtedness, including Senior
Debt, that the Company and its Subsidiaries can incur. See "--Certain
Covenants-- Incurrence of Indebtedness and Issuance of Disqualified Stock."
 
SUBSIDIARY GUARANTEES
 
   
    The Company's payment obligations under the Notes will be jointly, severally
and unconditionally guaranteed by the Company's two wholly owned subsidiaries,
Continental Gas, Inc. and Continental Crude Co., each of which is a Subsidiary
Guarantor, and by any future Restricted Subsidiary of the Company. The
Subsidiary Guarantees will be subordinated to Guarantor Senior Debt of the
Subsidiary Guarantors to the same extent and in the same manner as the Notes are
subordinated to the Senior Debt. As of March 31, 1998, on a pro forma basis
after giving effect to the Worland Field Acquisition and the relating financing
and the Offering, there would have been no Guarantor Senior Debt of Subsidiary
Guarantors outstanding other than the Subsidiary Guarantees and guarantees of
borrowings under the Credit Facility. Although the Indenture contains
limitations on the amount of additional Indebtedness that the Company's
Restricted Subsidiaries may incur, under certain circumstances the amount of
such Indebtedness could be
    
 
                                       69
<PAGE>
substantial and, in any case, such Indebtedness may be Guarantor Senior Debt.
See "--Certain Covenants--Incurrence of Indebtedness and Issuance of
Disqualified Stock" and "--Ranking and Subordination".
 
    The obligations of each Subsidiary Guarantor will be limited to the maximum
amount as will, after giving effect to all other contingent and fixed
liabilities of such Subsidiary Guarantor (including, without limitation, any
guarantees in respect of Indebtedness under the Credit Facility) and after
giving effect to any collections from or payments made by or on behalf of any
other Subsidiary Guarantor in respect of the obligations of such other
Subsidiary Guarantor under its Subsidiary Guarantee or pursuant to its
contribution obligations under the Indenture, result in the obligations of such
Subsidiary Guarantor under its Subsidiary Guarantee not constituting a
fraudulent conveyance or fraudulent transfer under federal or state law.
 
    Each Subsidiary Guarantor may consolidate with or merge into or sell its
assets to the Company or another Subsidiary Guarantor without limitation. Each
Subsidiary Guarantor may consolidate with or merge into or sell all or
substantially all its assets to a corporation, partnership or trust other than
the Company or another Subsidiary Guarantor (whether or not affiliated with the
Subsidiary Guarantor). Upon the sale or disposition of a Subsidiary Guarantor
(by merger, consolidation, the sale of its Capital Stock or the sale of all or
substantially all of its assets) to a Person (whether or not an Affiliate of the
Subsidiary Guarantor) which is not a Subsidiary of the Company, which sale or
disposition is otherwise in compliance with the Indenture (including the
covenant described under "--Repurchase at the Option of Holders--Asset Sales"),
such Subsidiary Guarantor will be deemed released from all its obligations under
the Indenture and its Subsidiary Guarantee and such Subsidiary Guarantee will
terminate; PROVIDED, HOWEVER, that any such termination will occur only to the
extent that all obligations in respect of Indebtedness of such Subsidiary
Guarantor under the Credit Facility and all of its guarantees of, and under all
of its pledges of assets or other security interests which secure, any other
Indebtedness of the Company will also terminate upon such release, sale or
transfer.
 
    Any Subsidiary Guarantor that is designated an Unrestricted Subsidiary in
accordance with the terms of the Indenture shall, upon such designation, be
released and relieved of its obligations under its Subsidiary Guarantee and any
Unrestricted Subsidiary whose designation as such is revoked and any newly
formed or newly acquired Subsidiary that becomes a Restricted Subsidiary will be
required to execute a Subsidiary Guarantee in accordance with the terms of the
Indenture.
 
MANDATORY REDEMPTION
 
    Except as set forth below under "--Repurchase at the Option of Holders," the
Company is not required to make mandatory redemption or sinking fund payments
with respect to the Notes.
 
REPURCHASE AT THE OPTION OF HOLDERS
 
    CHANGE OF CONTROL
 
    Upon the occurrence of a Change of Control, each Holder of the Notes will,
unless the Company shall have elected to redeem the Notes prior to August 1,
2003 upon a Change of Control as permitted by the third paragraph of "--Optional
Redemption," have the right to require the Company to repurchase all or any part
(equal to $1,000 or an integral multiple thereof) of such Holder's Notes
pursuant to the offer described below (the "Change of Control Offer") at an
offer price in cash equal to 101% of the aggregate principal amount of the Notes
plus accrued and unpaid interest, if any, thereon to the date of purchase (the
"Change of Control Payment"). Within 30 days following any Change of Control,
the Company will mail a notice to each Holder describing the transaction or
transactions that constitute the Change of Control and offer to repurchase the
Notes pursuant to the procedures required by the Indenture and described in such
notice on a date no earlier than 30 days nor later than 60 days from the date
such notice is mailed (the "Change of Control Payment Date").
 
                                       70
<PAGE>
    On the Change of Control Payment Date, the Company will, to the extent
lawful, (i) accept for payment all Notes or portions thereof properly tendered
pursuant to the Change of Control Offer, (ii) deposit with the Paying Agent an
amount equal to the Change of Control Payment in respect of all the Notes or
portions thereof so tendered and (iii) deliver or cause to be delivered to the
Trustee the relevant Notes so accepted together with an Officers' Certificate
stating the aggregate principal amount of such Notes or portions thereof being
purchased by the Company. The Paying Agent will promptly mail to each Holder of
the Notes so tendered the Change of Control Payment for such Notes, and the
Trustee will promptly authenticate and mail (or cause to be transferred by book
entry) to each tendering Holder a new Note equal in principal amount to any
unpurchased portion of the Notes surrendered, if any; PROVIDED that each such
new Note will be in a principal amount of $1,000 or an integral multiple
thereof. The Indenture will provide that, prior to complying with the provisions
of this covenant, but in any event within 30 days following a Change of Control,
the Company will either repay all outstanding Senior Debt or obtain the
requisite consents, if any, under all agreements governing outstanding Senior
Debt to permit the repurchase of the Notes required by this covenant. The
Company will publicly announce the results of the Change of Control Offer on or
as soon as practicable after the Change of Control Payment Date.
 
    Except as described above with respect to a Change of Control, the Indenture
will not contain provisions that permit the Holders of the Notes to require that
the Company repurchase or redeem the Notes in the event of a takeover,
recapitalization or similar transaction.
 
    The Company will not be required to make a Change of Control Offer if a
third party makes the Change of Control Offer in the manner, at the times and
otherwise in compliance with the requirements set forth in the Indenture
applicable to a Change of Control Offer made by the Company and purchases all
Notes validly tendered and not withdrawn under such Change of Control Offer.
 
    The definition of Change of Control includes a phrase relating to the sale,
lease, transfer, conveyance or other disposition of "all or substantially all"
of the assets of the Company and its Subsidiaries taken as a whole. Although
there is a developing body of case law interpreting the phrase "substantially
all," there is no precise established definition of the phrase under applicable
law. Accordingly, the ability of a Holder of the Notes to require the Company to
repurchase such Notes as a result of a sale, lease, transfer, conveyance or
other disposition of less than all of the assets of the Company and its
Subsidiaries taken as a whole to another Person or group may be uncertain.
 
    In the event that the Company makes an offer to purchase the Notes pursuant
to the provisions of this "--Change of Control" covenant, the Company intends to
comply with any applicable securities laws and regulations, including any
applicable requirements of Section 14(e) of, and Rule 14e-1 under, the
Securities Exchange Act of 1934, as amended (the "Exchange Act").
 
    ASSET SALES
 
    The Indenture provides that the Company will not, and will not permit any of
its Restricted Subsidiaries to, engage in an Asset Sale unless (i) the Company
or the Restricted Subsidiary, as the case may be, receives consideration at the
time of such Asset Sale at least equal to the fair market value (as determined
in good faith by a resolution of the Board of Directors set forth in an
Officers' Certificate delivered to the Trustee, which determination shall be
conclusive evidence of compliance with this provision) of the assets or Equity
Interests issued or sold or otherwise disposed of and (ii) at least 85% of the
consideration therefor received by the Company or such Restricted Subsidiary
from such Asset Sale is in the form of cash, Cash Equivalents, properties and
capital assets to be used by the Company or any Restricted Subsidiary in the Oil
and Gas Business or oil and gas properties owned or held by another Person which
are to be used in the Oil and Gas Business of the Company or its Restricted
Subsidiaries, or any combination thereof (collectively the "Cash
Consideration"); PROVIDED that the amount of (x) any liabilities (as shown on
the Company's or such Restricted Subsidiary's most recent balance sheet) of the
Company or any Restricted Subsidiary (other than contingent liabilities and
liabilities that are by their terms subordinated to the Notes or any guarantee
thereof) that are assumed by the transferee of any such assets pursuant to a
customary novation agreement that releases the Company or such Restricted
 
                                       71
<PAGE>
Subsidiary from further liability and (y) any non-cash consideration received by
the Company or any such Restricted Subsidiary from such transferee that are
converted by the Company or such Restricted Subsidiary into cash within 180 days
of closing such Asset Sale, shall be deemed to be cash for purposes of this
provision (to the extent of the cash received); PROVIDED, HOWEVER, that the
Company and its Restricted Subsidiaries may make Asset Sales with a fair market
value not exceeding $10 million in the aggregate in each fiscal year free from
any of the restrictions, requirements or other provisions under this "--Asset
Sales" section.
 
    Within 360 days after the receipt of any Net Proceeds from an Asset Sale,
the Company may apply such Net Proceeds, at its option, in any order or
combination, (a) to reduce Senior Debt or Guarantor Senior Debt, (b) to make
Permitted Investments, (c) to make investments in interests in other Oil and Gas
Businesses or (d) to make capital expenditures in respect of the Company's or
its Restricted Subsidiaries' Oil and Gas Business or to purchase long-term
assets that are used or useful in the Oil and Gas Business. Pending the final
application of any such Net Proceeds, the Company may temporarily reduce Senior
Debt that is revolving debt or otherwise invest such Net Proceeds in any manner
that is not prohibited by the Indenture. Any Net Proceeds from Asset Sales that
are not applied as provided in the first sentence of this paragraph will (after
the expiration of the periods specified in this paragraph) be deemed to
constitute "Excess Proceeds."
 
    When the aggregate amount of Excess Proceeds exceeds $15 million, the
Company will be required to make an offer to all Holders of the Notes and, to
the extent required by the terms thereof, to all holders or lenders of Pari
Passu Indebtedness (an "Asset Sale Offer") to purchase the maximum principal
amount of the Notes and any such Pari Passu Indebtedness to which the Asset Sale
Offer applies that may be purchased out of the Excess Proceeds, at an offer
price in cash equal to 100% of the principal amount thereof plus accrued and
unpaid interest thereon to the date of purchase, in accordance with the
procedures set forth in the Indenture or the agreements governing the Pari Passu
Indebtedness, as applicable. To the extent that the aggregate principal amount
of the Notes and Pari Passu Indebtedness (or accreted value, as the case may be)
tendered pursuant to an Asset Sale Offer is less than the Excess Proceeds, the
Company may use any remaining Excess Proceeds for general corporate purposes. If
the aggregate principal amount of the Notes surrendered by Holders thereof and
other Pari Passu Indebtedness surrendered by holders or lenders thereof,
collectively, exceeds the amount of Excess Proceeds, the Trustee shall select
the Notes and Pari Passu Indebtedness to be purchased on a pro rata basis, based
on the aggregate principal amount thereof (or accreted value, as the case may
be) surrendered in such Asset Sale Offer. Upon completion of such Asset Sale
Offer, the amount of Excess Proceeds shall be reset at zero.
 
    In the event that the Company makes an offer to purchase the Notes pursuant
to the provisions of this "--Asset Sales" covenant, the Company intends to
comply with any applicable securities laws and regulations, including any
applicable requirements of Section 14(e) of, and Rule 14e-1 under, the Exchange
Act.
 
    The Credit Facility may prohibit the Company from purchasing any Notes and
also provides that certain change of control events with respect to the Company
would constitute a default thereunder. Any future credit agreements or other
agreements relating to Senior Debt to which the Company becomes a party may
contain similar restrictions and provisions. In the event a Change of Control or
Asset Sale Offer occurs at a time when the Company is prohibited from purchasing
the Notes by the terms of the Credit Facility or other agreements relating to
other Senior Debt, the Company could seek the consent of its lenders to the
purchase or could attempt to refinance the borrowings that contain such
prohibition. If the Company does not obtain such a consent or refinance such
borrowings, the Company may remain prohibited from purchasing the Notes. In such
case, the Company's failure to purchase tendered Notes would constitute an Event
of Default under the Indenture which would, in turn, constitute a default under
the Credit Facility. In such circumstances, the subordination provisions in the
Indenture would likely restrict payments to the Holders of the Notes.
 
                                       72
<PAGE>
CERTAIN COVENANTS
 
    RESTRICTED PAYMENTS
 
    The Indenture provides that the Company will not, and will not permit any of
its Restricted Subsidiaries to, directly or indirectly: (i) declare or pay any
dividend or make any other payment or distribution on account of the Equity
Interests of the Company or any Restricted Subsidiary (including, without
limitation, any payment in connection with any merger or consolidation involving
the Company) to the direct or indirect holders of Equity Interests of the
Company or any Restricted Subsidiary in their capacity as such (other than
dividends or distributions payable in Equity Interests of the Company or a
Restricted Subsidiary (other than Disqualified Stock) and other than dividends
or distributions payable to the Company or a Restricted Subsidiary so long as,
in the case of any dividend or distribution payable on or in respect of any
class or series of securities issued by a Subsidiary other than a Wholly Owned
Restricted Subsidiary, the Company or a Restricted Subsidiary receives at least
its pro rata share of such dividend or distribution in accordance with its
Equity Interests in such class or series of securities); (ii) purchase, redeem
or otherwise acquire or retire for value any Equity Interests of the Company or
any Subsidiary of the Company that is not a Wholly Owned Restricted Subsidiary
of the Company; (iii) make any principal payment on, or purchase, redeem,
defease or otherwise acquire or retire for value any Indebtedness that is
subordinated to the Notes, except at final maturity or as a mandatory or sinking
fund repayment; or (iv) make any Restricted Investment (all such payments and
other actions set forth in clauses (i) through (iv) above being collectively
referred to as "Restricted Payments"), unless, at the time of and after giving
effect to such Restricted Payment:
 
        (a) no Default or Event of Default shall have occurred and be continuing
    or would occur as a consequence thereof; and
 
        (b) the Company would, at the time of such Restricted Payment and after
    giving pro forma effect thereto as if such Restricted Payment had been made
    at the beginning of the applicable four-quarter period, have been permitted
    to incur at least $1.00 of additional Indebtedness pursuant to the Fixed
    Charge Coverage Ratio test set forth in the first paragraph of the covenant
    described below under the caption "--Incurrence of Indebtedness and Issuance
    of Disqualified Stock"; and
 
        (c) such Restricted Payment, together with the aggregate of all other
    Restricted Payments made by the Company and its Restricted Subsidiaries
    after the date of the Indenture (excluding Restricted Payments permitted by
    clauses (1), (3), (4) and (6) of the next succeeding paragraph), is less
    than the sum of (i) 50% of the Consolidated Net Income of the Company for
    the period (taken as one accounting period) from the beginning of the first
    fiscal quarter commencing after the date of the Indenture to the end of the
    Company's most recently ended fiscal quarter for which internal financial
    statements are available at the time of such Restricted Payment (or, if such
    Consolidated Net Income for such period is a deficit, less 100% of such
    deficit), PLUS (ii) 100% of the aggregate net cash proceeds received by the
    Company from the issue or sale since the date of the Indenture of Equity
    Interests of the Company or of debt securities of the Company that have been
    converted into or exchanged for such Equity Interests (other than Equity
    Interests (or convertible debt securities) sold to a Subsidiary of the
    Company and other than Disqualified Stock or debt securities that have been
    converted into Disqualified Stock), PLUS (iii) to the extent that any
    Restricted Investment that was made after the date of the Indenture is sold
    for cash or otherwise liquidated or repaid for cash or the receipt of
    properties used in the Oil and Gas Business, the lesser of (A) the net cash
    proceeds of such sale, liquidation or repayment or the fair market value of
    property received in exchange therefor and (B) the amount of such Restricted
    Investment, PROVIDED, however, that the foregoing provisions of this
    paragraph (c) will not prohibit Restricted Payments in an aggregate amount
    not to exceed $15 million.
 
    The foregoing provisions will not prohibit (1) the payment of any dividend
within 60 days after the date of declaration thereof, if at said date of
declaration such payment would have complied with the provisions of the
Indenture; (2) the redemption, repurchase, retirement or other acquisition of
any Equity
 
                                       73
<PAGE>
Interests of the Company in exchange for, or out of the proceeds of, the
substantially concurrent sale (other than to a Subsidiary of the Company) of
other Equity Interests of the Company (other than a sale of Disqualified Stock);
PROVIDED that the amount of any such net cash proceeds that are utilized for any
such redemption, repurchase, retirement or other acquisition shall be excluded
from clause (c)(ii) of the preceding paragraph; (3) the defeasance, redemption
or repurchase of subordinated Indebtedness with the net cash proceeds from an
incurrence of subordinated Permitted Refinancing Debt or the substantially
concurrent sale (other than to a Subsidiary of the Company) of Equity Interests
(other than Disqualified Stock) of the Company; PROVIDED that the amount of any
such net cash proceeds that are utilized for any such redemption, repurchase,
retirement or other acquisition shall be excluded from clause (c)(ii) of the
preceding paragraph; (4) the repurchase, redemption or other acquisition or
retirement for value of any Equity Interests of the Company or any Subsidiary of
the Company held by any of the Company's (or any of its Subsidiaries') employees
pursuant to any management equity subscription agreement or stock option
agreement in effect as of the date of the Indenture; PROVIDED that the aggregate
price paid for all such repurchased, redeemed, acquired or retired Equity
Interests shall not exceed $2 million in any twelve-month period; and PROVIDED
FURTHER that no Default or Event of Default shall have occurred and be
continuing immediately after such transaction; (5) repurchases of Equity
Interests deemed to occur upon exercise of stock options if such Equity
Interests represent a portion of the exercise price of such options; (6) the
making of loans by the Company or any of its Restricted Subsidiaries to officers
or directors of the Company; PROVIDED that the aggregate outstanding amount of
such loans shall not exceed, at any time, $2 million plus any such loans
outstanding on the date of the Indenture; and (7) during the period the Company
is subject to Subchapter S of the Internal Revenue Code of 1986, as amended (the
"Code"), and after such period to the extent relating to the liability for such
period, the making of payments or distributions or the payment of dividends in
amounts equal to the amounts required for the Company's stockholders to pay
Federal, state and local income taxes to the extent such income taxes are
attributable to the taxable income of the Company.
 
    The amount of all Restricted Payments (other than cash) shall be the fair
market value (as determined in good faith by a resolution of the Board of
Directors set forth in an Officers' Certificate delivered to the Trustee) on the
date of the Restricted Payment of the asset(s) proposed to be transferred by the
Company or the applicable Restricted Subsidiary, as the case may be, pursuant to
the Restricted Payment. In computing Consolidated Net Income of the Company
under paragraph (c) above, (1) the Company shall use audited financial
statements for the portions of the relevant period for which audited financial
statements are available on the date of determination and unaudited financial
statements and other current financial data based on the books and records of
the Company for the remaining portion of such period and (2) the Company shall
be permitted to rely in good faith on the financial statements and other
financial data derived from the books and records of the Company that are
available on the date of determination.
 
    DESIGNATION OF UNRESTRICTED SUBSIDIARIES
 
    The Board of Directors of the Company may designate any Restricted
Subsidiary to be an Unrestricted Subsidiary if such designation would not cause
a Default. For purposes of making such determination, all outstanding
Investments by the Company and its Restricted Subsidiaries (except to the extent
repaid in cash) in the Subsidiary so designated will be deemed to be Restricted
Payments at the time of such designation and will reduce the amount available
for Restricted Payments under clause (c) of the first paragraph of the covenant
"Restricted Payments." All such outstanding Investments will be deemed to
constitute Investments in an amount equal to the greater of the fair market
value or the book value of such Investments at the time of such designation.
Such designation will only be permitted if such Restricted Payment would be
permitted at such time and if such Restricted Subsidiary otherwise meets the
definition of an Unrestricted Subsidiary.
 
                                       74
<PAGE>
    INCURRENCE OF INDEBTEDNESS AND ISSUANCE OF DISQUALIFIED STOCK
 
    The Indenture provides that the Company will not, and will not permit any of
its Restricted Subsidiaries to, directly or indirectly, create, incur, issue,
assume, guarantee or otherwise become directly or indirectly liable,
contingently or otherwise, with respect to (collectively, "incur") any
Indebtedness or issue any Disqualified Stock and the Company will not permit any
of its Restricted Subsidiaries to issue any shares of Disqualified Stock to any
Person other than the Company or a Wholly-Owned Restricted Subsidiary of the
Company; PROVIDED, HOWEVER, that the Company and any Subsidiary Guarantor may
incur Indebtedness or issue shares of Disqualified Stock if:
 
        (i) the Fixed Charge Coverage Ratio for the Company's most recently
    ended four full fiscal quarters for which internal financial statements are
    available immediately preceding the date on which such additional
    Indebtedness is incurred or such Disqualified Stock is issued would have
    been at least 2.5 to 1, determined on a pro forma basis as set forth in the
    definition of Fixed Charge Coverage Ratio; and
 
        (ii) no Default or Event of Default shall have occurred and be
    continuing at the time such additional Indebtedness is incurred or such
    Disqualified Stock is issued or would occur as a consequence of the
    incurrence of the additional Indebtedness or the issuance of the
    Disqualified Stock.
 
    Notwithstanding the foregoing, the Indenture does not prohibit any of the
following (collectively, "Permitted Indebtedness"): (a) the Indebtedness
evidenced by the Notes; (b) the incurrence by the Company or any of its
Restricted Subsidiaries of Indebtedness pursuant to Credit Facilities, so long
as the aggregate principal amount of all Indebtedness outstanding under all
Credit Facilities does not, at any one time, exceed the greater of (i) $175
million and (ii) the Borrowing Base, provided that the Company may incur more
than $175 million of Indebtedness pursuant to Credit Facilities only if the
Fixed Charge Coverage Ratio for the Company's most recently ended four full
fiscal quarters for which internal financial statements are available would have
been at least 2.0 to 1, determined on a pro forma basis as set forth in the
definition of Fixed Charge Coverage Ratio; (c) the guarantee by any Subsidiary
Guarantor of any Indebtedness that is permitted by the Indenture to be incurred
by the Company; (d) all Indebtedness of the Company and its Restricted
Subsidiaries in existence as of the date of the Indenture; (e) intercompany
Indebtedness between or among the Company and any of its Wholly Owned Restricted
Subsidiaries; PROVIDED, HOWEVER, that if the Company is the obligor on such
Indebtedness, (A) any subsequent issuance or transfer of Equity Interests that
results in any such Indebtedness being held by a Person other than the Company
or a Wholly Owned Restricted Subsidiary and (B) any sale or other transfer of
any such Indebtedness to a Person that is not either the Company or a Wholly
Owned Restricted Subsidiary shall be deemed, in each case, to constitute an
incurrence of such Indebtedness by the Company or such Restricted Subsidiary, as
the case may be; (f) Indebtedness in connection with one or more standby letters
of credit, guarantees, performance bonds or other reimbursement obligations, in
each case, issued in the ordinary course of business and not in connection with
the borrowing of money or the obtaining of advances or credit (other than
advances or credit on open account, includible in current liabilities, for goods
and services in the ordinary course of business and on terms and conditions
which are customary in the Oil and Gas Business, and other than the extension of
credit represented by such letter of credit, guarantee or performance bond
itself), not to exceed in the aggregate at any given time 5% of Total Assets;
(g) Indebtedness under Interest Rate Hedging Agreements entered into for the
purpose of limiting interest rate risks, PROVIDED that the obligations under
such agreements are related to payment obligations on Indebtedness otherwise
permitted by the terms of this covenant and that the aggregate notional
principal amount of such agreements does not exceed 105% of the principal amount
of the Indebtedness to which such agreements relate; (h) Indebtedness under Oil
and Gas Hedging Contracts, PROVIDED that such contracts were entered into in the
ordinary course of business for the purpose of limiting risks that arise in the
ordinary course of business of the Company and its Restricted Subsidiaries; (i)
the incurrence by the Company and its Restricted Subsidiaries of Indebtedness
not otherwise permitted to be incurred pursuant
 
                                       75
<PAGE>
to this paragraph, PROVIDED that the aggregate principal amount of all
Indebtedness incurred pursuant to this clause (i), together with all Permitted
Refinancing Debt incurred pursuant to clause (j) of this paragraph in respect of
Indebtedness previously incurred pursuant to this clause (i), does not exceed
$20 million at any one time outstanding; (j) Permitted Refinancing Debt incurred
in exchange for, or the net proceeds of which are used to refinance, extend,
renew, replace, defease or refund, Indebtedness that was permitted by the
Indenture to be incurred (including Indebtedness previously incurred pursuant to
this clause (j), but excluding Indebtedness under clauses (b), (e), (f), (g),
(h), (k), (l) and (m)); (k) accounts payable or other obligations of the Company
or any Restricted Subsidiary to trade creditors created or assumed by the
Company or such Restricted Subsidiary in the ordinary course of business in
connection with the obtaining of goods or services; (l) Indebtedness consisting
of obligations in respect of purchase price adjustments, guarantees or
indemnities in connection with the acquisition or disposition of assets; (m)
production imbalances occurring in the ordinary course of business that do not,
at any one time outstanding, exceed 2% of the Total Assets of the Company; (n)
rents and royalties due others incurred in the ordinary course of the Oil and
Gas Business; and (o) Indebtedness of a Subsidiary Guarantor in respect of the
Subsidiary Guarantee of such Subsidiary Guarantor.
 
    The Indenture provides that the Company will not permit any Unrestricted
Subsidiary to incur any Indebtedness other than Non-Recourse Debt; PROVIDED,
HOWEVER, if any such Indebtedness ceases to be Non-Recourse Debt, such event
shall be deemed to constitute an incurrence of Indebtedness by the Company.
 
    NO LAYERING
 
    The Indenture provides that (i) the Company will not incur, create, issue,
assume, guarantee or otherwise become liable for any Indebtedness that is
subordinate or junior in right of payment to any Senior Debt and senior in any
respect in right of payment to the Notes and (ii) the Subsidiary Guarantors will
not directly or indirectly incur, create, issue, assume, guarantee or otherwise
become liable for any Indebtedness that is subordinate or junior in right of
payment to Guarantor Senior Debt and senior in any respect in right of payment
to the Subsidiary Guarantees, PROVIDED, HOWEVER, that the foregoing limitations
will not apply to distinctions between categories of Indebtedness that exist by
reason of any Liens arising or created in accordance with the provisions of the
Indenture in respect of some but not all such Indebtedness.
 
    LIENS
 
    The Indenture provides that the Company will not, and will not permit any of
its Restricted Subsidiaries to, create, incur, assume or otherwise cause or
suffer to exist or become effective any Lien securing Indebtedness of any kind
(other than Permitted Liens) upon any of its property or assets, now owned or
hereafter acquired, unless all payments under the Notes are secured by such Lien
prior to, or on an equal and ratable basis with, the Indebtedness so secured for
so long as such Indebtedness is secured by such Lien.
 
    SALE AND LEASEBACK TRANSACTIONS
 
    The Indenture provides that the Company will not, and will not permit any of
its Restricted Subsidiaries to, enter into any sale and leaseback transaction;
PROVIDED that the Company or its Restricted Subsidiaries may enter into a sale
and leaseback transaction if (i) the Company could have incurred Indebtedness in
an amount equal to the Attributable Debt relating to such sale and leaseback
transaction pursuant to the test set forth in the first paragraph of the
covenant described above under the caption "Incurrence of Indebtedness and
Issuance of Disqualified Stock" or (ii) the gross cash proceeds of such sale and
leaseback transaction are at least equal to the fair market value (as determined
in good faith by a resolution the Board of Directors set forth in an Officers'
Certificate delivered to the Trustee) of the property that is the subject of
such sale and leaseback transaction and the transfer of assets in such sale
 
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<PAGE>
and leaseback transaction is permitted by, and the Company applies the net
proceeds of such transaction in compliance with, the covenant described above
under the caption "Repurchase at the Option of Holders-- Asset Sales."
 
   DIVIDEND AND OTHER PAYMENT RESTRICTIONS AFFECTING RESTRICTED SUBSIDIARIES
 
    The Indenture provides that the Company will not, and will not permit any of
its Restricted Subsidiaries to, directly or indirectly, create or otherwise
cause or suffer to exist or become effective any encumbrance or restriction on
the ability of any Restricted Subsidiary to (i)(x) pay dividends or make any
other distributions to the Company or any of the Restricted Subsidiaries of the
Company (1) on its Capital Stock or (2) with respect to any other interest or
participation in, or measured by, its profits, or (y) pay any Indebtedness owed
to the Company or any Restricted Subsidiaries of the Company, (ii) make loans or
advances to the Company or any Restricted Subsidiaries of the Company or (iii)
transfer any of its properties or assets to the Company or any Restricted
Subsidiaries of the Company, except for such encumbrances or restrictions
existing under or by reason of (a) the Credit Facility as in effect as of the
date of the Indenture and any amendments, modifications, restatements, renewals,
increases, supplements, refundings, replacements or refinancings thereof or any
other Credit Facility, PROVIDED that such amendments, modifications,
restatements, renewals, increases, supplements, refundings, replacements,
refinancings or other Credit Facilities are no more restrictive with respect to
such dividend and other payment restrictions than those contained in the Credit
Facility as in effect on the date of the Indenture, (b) the Indenture and the
Notes, (c) applicable law, (d) any instrument governing Indebtedness or Capital
Stock of a Person acquired by the Company or any of its Restricted Subsidiaries
as in effect at the time of such acquisition (except, in the case of
Indebtedness, to the extent such Indebtedness was incurred in connection with or
in contemplation of such acquisition), which encumbrance or restriction is not
applicable to any Person, or the properties or assets of any Person, other than
the Person and its Subsidiaries, or the property or assets of the Person and its
Subsidiaries, so acquired, PROVIDED that, such Indebtedness or Capital Stock was
permitted by the terms of the Indenture to be incurred, (e) customary
non-assignment provisions in leases entered into in the ordinary course of
business, (f) purchase money obligations for property acquired in the ordinary
course of business that impose restrictions of the nature described in clause
(iii) above on the property so acquired, (g) Permitted Refinancing Debt,
PROVIDED that the restrictions contained in the agreements governing such
Permitted Refinancing Debt are no more restrictive than those contained in the
agreements governing the Indebtedness being refinanced, (h) any other security
agreement, instrument or document relating to Senior Debt hereafter in effect,
provided that such encumbrances or restrictions are customary in connection with
such documents and that the terms and conditions of such encumbrances or
restrictions are no more restrictive than those encumbrances or restrictions
imposed in connection with the Credit Facility, (i) Permitted Liens, (j)
customary provisions in joint venture agreements and other similar agreements
relating to the distribution of revenues from such joint venture or other
business venture, or (k) any agreement relating to a sale and leaseback
transaction or capital lease, but only on the property subject to such
transaction or lease and only to the extent that such restrictions or
encumbrances are customary with respect to a sale and leaseback transaction or
capital lease.
 
   LIMITATION ON THE SALE OR ISSUANCE OF CAPITAL STOCK OF RESTRICTED
   SUBSIDIARIES
 
    The Indenture provides that the Company will not sell or otherwise dispose
of any shares of Capital Stock of a Restricted Subsidiary, and shall not permit
any Restricted Subsidiary, directly or indirectly, to issue or sell or otherwise
dispose of any shares of its Capital Stock except (i) to the Company or a Wholly
Owned Restricted Subsidiary, (ii) if, immediately after giving effect to such
issuance, sale or other disposition, such Restricted Subsidiary remains a
Restricted Subsidiary, (iii) shares of nonvoting Capital Stock of Restricted
Subsidiaries may be issued or sold to employees or directors of the Company or
any Subsidiary, or (iv) if all shares of Capital Stock of such Restricted
Subsidiary are sold or otherwise disposed. In connection with any sale or
disposition of Capital Stock of a Restricted Subsidiary, the
 
                                       77
<PAGE>
Company will be required to comply with the covenant described under the caption
"Repurchase at the Option of Holders--Asset Sales" above.
 
    MERGER, CONSOLIDATION, OR SALE OF ASSETS
 
    The Indenture provides that the Company may not consolidate or merge with or
into (whether or not the Company is the surviving corporation), or sell, assign,
transfer, lease, convey or otherwise dispose of all or substantially all of its
properties or assets, in one or more related transactions, to another Person,
and the Company may not permit any of its Restricted Subsidiaries to enter into
any such transaction or series of transactions if such transaction or series of
transactions would, in the aggregate, result in a sale, assignment, transfer,
lease, conveyance, or other disposition of all or substantially all of the
properties or assets of the Company to another Person unless (i) the Company is
the surviving corporation or the Person formed by or surviving any such
consolidation or merger (if other than the Company) or to which such sale,
assignment, transfer, lease, conveyance or other disposition shall have been
made (the "Surviving Entity") is a corporation organized or existing under the
laws of the United States, any state thereof or the District of Columbia; (ii)
the Surviving Entity (if the Company is not the continuing obligor under the
Indenture) assumes all the obligations of the Company under the Notes and the
Indenture pursuant to a supplemental indenture in a form reasonably satisfactory
to the Trustee; (iii) immediately before and after giving effect to such
transaction or series of transactions no Default or Event of Default exists;
(iv) immediately after giving effect to such transaction or series of
transactions on a pro forma basis (and treating any Indebtedness not previously
an obligation of the Company and its Restricted Subsidiaries which becomes the
obligation of the Company or any of its Restricted Subsidiaries as a result of
such transaction as having been incurred at the time of such transaction or
series of transactions), the Consolidated Net Worth of the Company or the
Surviving Entity (if the Company is not the continuing obligor under the
Indenture) is equal to or greater than the Consolidated Net Worth of the Company
immediately prior to such transaction or series of transactions; and (v) the
Company or the Surviving Entity (if the Company is not the continuing obligor
under the Indenture) will, at the time of such transaction or series of
transactions and after giving pro forma effect thereto as if such transaction or
series of transactions had occurred at the beginning of the applicable
four-quarter period, be permitted to incur at least $1.00 of additional
Indebtedness pursuant to the test set forth in the first paragraph of the
covenant described above under the caption "--Incurrence of Indebtedness and
Issuance of Disqualified Stock." Each Subsidiary Guarantor, if any, unless it is
the other party to the transactions described above, shall have confirmed by
supplemental indenture that its Subsidiary Guarantee shall apply to such
Person's obligations under the Indenture and the Notes. Notwithstanding the
restrictions described in the foregoing clauses (iv) and (v), any Restricted
Subsidiary may consolidate with, merge into or transfer all or part of its
properties and assets to the Company, and any Wholly Owned Restricted Subsidiary
may consolidate with, merge into or transfer all or part of its properties and
assets to another Wholly Owned Restricted Subsidiary.
 
    TRANSACTIONS WITH AFFILIATES
 
    The Indenture provides that the Company will not, and will not permit any of
its Restricted Subsidiaries to, make any payment to, or sell, lease, transfer or
otherwise dispose of any of its properties or assets to, or purchase any
property or assets from, or enter into or make or amend any contract, agreement,
understanding, loan, advance or guarantee with, or for the benefit of, any of
its Affiliates (each of the foregoing, an "Affiliate Transaction"), unless (i)
such Affiliate Transaction is on terms that are no less favorable to the Company
or the relevant Restricted Subsidiary than those that would have been obtained
in a comparable transaction by the Company or such Restricted Subsidiary with an
unrelated Person and (ii) the Company delivers to the Trustee (a) with respect
to any Affiliate Transaction or series of related Affiliate Transactions
involving aggregate consideration in excess of $1 million but less than or equal
to $5 million, an Officer's Certificate certifying that such Affiliate
Transaction complies with clause (i) above, (b) with respect to any Affiliate
Transaction or series of related Affiliate Transactions involving
 
                                       78
<PAGE>
aggregate consideration in excess of $5 million but less than or equal to $10
million, a resolution of the Board of Directors set forth in an Officer's
Certificate certifying that such Affiliate Transaction complies with clause (i)
above and that such Affiliate Transaction has been approved in good faith by a
majority of the members of the Board of Directors who have no financial interest
in such Affiliate Transaction, which resolution shall be conclusive evidence of
compliance with this provision, and (c) with respect to any Affiliate
Transaction or series of related Affiliate Transactions involving aggregate
consideration in excess of $10 million, an Officer's Certificate as described in
clause (b) above and an opinion as to the fairness to the Company or such
Subsidiary of such Affiliate Transaction from a financial point of view issued
by an accounting, appraisal, engineering or investment banking firm of national
standing (for purposes of this clause (c) such opinion and the resolution
described in clause (b) above shall be conclusive evidence of compliance with
this provision); PROVIDED that the following shall not be deemed Affiliate
Transactions: (1) reasonable fees and compensation paid to (including issuances
and grants of securities and stock options), and employment agreements and stock
option and ownership plans for the benefit of, officers, directors, employees or
consultants of the Company or any Restricted Subsidiary of the Company as
determined in good faith by the Company's Board of Directors or senior
management, (2) transactions contemplated by any employment agreement or other
compensation plan or arrangement entered into by the Company or any of its
Subsidiaries in the ordinary course of business and consistent with past
practice of the Company or such Subsidiary, (3) transactions between or among
the Company and/or its Restricted Subsidiaries, (4) Restricted Payments and
Permitted Investments that are permitted by the provisions of the Indenture
described above under the caption "--Restricted Payments" and the definition of
Permitted Investments, (5) indemnification payments made to officers, directors
and employees of the Company or its Subsidiaries pursuant to charter, by-law,
statutory or contractual provisions, (6) any contracts, agreements and
understandings existing as of the date of the Indenture, and (7) oil and gas
leasehold acquisition, drilling, well servicing and leasehold operations
services provided by or to such Affiliate in the ordinary course of the Oil and
Gas Business on terms that are no less favorable to the Company or the relevant
Restricted Subsidiary than those that would have been obtained in a comparable
transaction by the Company or such Restricted Subsidiary with an unrelated
Person.
 
    ADDITIONAL SUBSIDIARY GUARANTEES
 
    The Indenture provides that if the Company or any of its Restricted
Subsidiaries shall acquire or create another Restricted Subsidiary after the
date of the Indenture, then such newly acquired or created Restricted Subsidiary
will be required to execute a Subsidiary Guarantee in accordance with the terms
of the Indenture.
 
    BUSINESS ACTIVITIES
 
    The Company will not, and will not permit any Restricted Subsidiary to,
engage in any material respect in any business other than the Oil and Gas
Business.
 
    COMMISSION REPORTS
 
    Notwithstanding that the Company is not subject to the reporting
requirements of Section 13 or 15(d) of the Exchange Act, the Company will file
with the Commission and, within 15 days after such filing, provide the Trustee
and Holders with the annual reports and the information, documents and other
reports which are specified in Sections 13 and 15(d) of the Exchange Act. In the
event that the Company is not permitted to file such reports, documents and
information with the Commission, the Company will provide substantially similar
information to the Trustee and the Holders as if the Company were subject to the
reporting requirements of Section 13 or 15(d) of the Exchange Act within 15 days
of the date the Company would have been obligated to file such reports with the
Commission, were the Company permitted to file such reports with the Commission.
The Company also will comply with the other provisions of Section 314(a) of the
Trust Indenture Act.
 
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EVENTS OF DEFAULT AND REMEDIES
 
    The Indenture provides that each of the following constitutes an Event of
Default: (i) a default for 30 consecutive days in the payment when due of
interest on the Notes (whether or not prohibited by the subordination provisions
of the Indenture); (ii) a default in payment when due of the principal of or
premium, if any, on the Notes (whether or not prohibited by the subordination
provisions of the Indenture); (iii) the failure by the Company or a Subsidiary
Guarantor to comply with its obligations under "Certain Covenants--Merger,
Consolidation or Sale of Assets" above; (iv) the failure by the Company for 30
days after notice from the Trustee or the Holders of at least 25% in aggregate
principal amount of the Notes then outstanding to comply with the provisions
described under the captions "Repurchase at the Option of Holders" and "Certain
Covenants" other than the provisions described under "--Merger, Consolidation or
Sale of Assets"; (v) failure by the Company for 60 consecutive days after notice
from the Trustee or the Holders of at least 25% in aggregate principal amount of
the Notes then outstanding to comply with any of its other agreements in the
Indenture or the Notes; (vi) except as permitted by the Indenture, any
Subsidiary Guarantee shall be held in any judicial proceeding to be
unenforceable or invalid or shall cease for any reason to be in full force and
effect or a Subsidiary Guarantor, or any Person acting on behalf of such
Subsidiary Guarantor, shall deny or disaffirm its obligations under its
Subsidiary Guarantee; (vii) a default under any mortgage, indenture or
instrument under which there may be issued or by which there may be secured or
evidenced any Indebtedness for money borrowed by the Company or any of its
Restricted Subsidiaries (or the payment of which is guaranteed by the Company or
any of its Restricted Subsidiaries) whether such Indebtedness or guarantee now
exists, or is created after the date of the Indenture, which default (a) is
caused by a failure to pay principal of such Indebtedness prior to the
expiration of the grace period provided in such Indebtedness on the date of such
default (a "Payment Default") or (b) results in the acceleration of such
Indebtedness prior to its express maturity and, in each case, the principal
amount of any such Indebtedness, together with the principal amount of any other
such Indebtedness under which there is then existing a Payment Default or the
maturity of which has been so accelerated, aggregates $10 million or more;
(viii) the failure by the Company or any of its Restricted Subsidiaries to pay
final, non-appealable judgments aggregating in excess of $10 million, which
judgments remain unpaid or discharged for a period of 60 days; and (ix) certain
events of bankruptcy or insolvency with respect to the Company or any of its
Restricted Subsidiaries.
 
    If any Event of Default occurs and is continuing, the Trustee or the Holders
of at least 25% in aggregate principal amount of the Notes then outstanding may
declare the principal of and accrued but unpaid interest on such Notes to be due
and payable immediately. Notwithstanding the foregoing, in the case of an Event
of Default arising from certain events of bankruptcy or insolvency, with respect
to the Company or any Restricted Subsidiary, all outstanding Notes will become
due and payable without further action or notice. Holders of the Notes may not
enforce the Indenture or the Notes except as provided in the Indenture. Subject
to certain limitations, Holders of a majority in principal amount of the Notes
then outstanding may direct the Trustee in its exercise of any trust or power.
The Trustee may withhold from Holders of the Notes notice of any continuing
Default or Event of Default (except a Default or Event of Default relating to
the payment of principal or interest) if it determines that withholding notice
is in their interest.
 
    The Holders of a majority in aggregate principal amount of the Notes then
outstanding by notice to the Trustee may on behalf of the Holders of all of the
Notes waive any existing Default or Event of Default and its consequences under
the Indenture except a continuing Default or Event of Default in the payment of
interest or premium on, or the principal of, the Notes.
 
    The Company is required to deliver to the Trustee annually a statement
regarding compliance with the Indenture, and the Company is required, within
five business days of becoming aware of any Default or Event of Default, to
deliver to the Trustee a statement specifying such Default or Event of Default.
 
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LEGAL DEFEASANCE AND COVENANT DEFEASANCE
 
    The Company may, at its option and at any time, elect to have all of its
obligations discharged with respect to the outstanding Notes and have each
Subsidiary Guarantor's, if any, obligation discharged with respect to its
Subsidiary Guarantee ("Legal Defeasance") except for (i) the rights of Holders
of such outstanding Notes to receive payments in respect of the principal of,
premium, if any, or interest on such Notes when such payments are due from the
trust referred to below, (ii) the Company's obligations with respect to such
Notes concerning issuing temporary Notes, registration of such Notes, mutilated,
destroyed, lost or stolen Notes and the maintenance of an office or agency for
payments, (iii) the rights, powers, trusts, duties and immunities of the
Trustee, and the Company's obligations in connection therewith and (iv) the
Legal Defeasance provisions of the Indenture. In addition, the Company may, at
its option and at any time, elect to have the obligations of the Company
released with respect to certain covenants that are described in the Indenture
("Covenant Defeasance") and thereafter any omission to comply with such
obligations shall not constitute a Default or Event of Default. In the event
Covenant Defeasance occurs, certain events (not including non-payment,
bankruptcy, receivership, rehabilitation and insolvency events) described under
"Events of Default and Remedies" will no longer constitute an Event of Default.
 
    In order to exercise either Legal Defeasance or Covenant Defeasance, (i) the
Company must irrevocably deposit with the Trustee, in trust, for the benefit of
the Holders of the Notes, cash in U.S. dollars, non-callable Government
Securities, or a combination thereof, in such amounts as will be sufficient, in
the opinion of a nationally recognized firm of independent public accountants,
to pay the principal of, premium, if any, and interest on the outstanding Notes
on the stated maturity or on the applicable redemption date, as the case may be,
and the Company must specify whether the Notes are being defeased to maturity or
to a particular redemption date; (ii) in the case of Legal Defeasance, the
Company shall have delivered to the Trustee an opinion of counsel in the United
States reasonably acceptable to such Trustee confirming that (A) the Company has
received from, or there has been published by, the Internal Revenue Service a
ruling or (B) since the date of the Indenture, there has been a change in the
applicable federal income tax law, in either case to the effect that, and based
thereon such opinion of counsel shall confirm that, the Holders of the
outstanding Notes will not recognize income, gain or loss for federal income tax
purposes as a result of such Legal Defeasance and will be subject to federal
income tax on the same amounts, in the same manner and at the same times as
would have been the case if such Legal Defeasance had not occurred; (iii) in the
case of Covenant Defeasance, the Company shall have delivered to the Trustee an
opinion of counsel in the United States reasonably acceptable to such Trustee
confirming that the Holders of the outstanding Notes will not recognize income,
gain or loss for federal income tax purposes as a result of such Covenant
Defeasance and will be subject to federal income tax on the same amounts, in the
same manner and at the same times as would have been the case if such Covenant
Defeasance had not occurred; (iv) no Default or Event of Default shall have
occurred and be continuing on the date of such deposit (other than a Default or
Event of Default resulting from the borrowing of funds to be applied to such
deposit) or insofar as Events of Default from bankruptcy or insolvency events
are concerned, at any time in the period ending on the 91st day after the date
of deposit; (v) such Legal Defeasance or Covenant Defeasance will not result in
a breach or violation of, or constitute a default under, any material agreement
or instrument (other than the Indenture) to which the Company or any of its
Subsidiaries is a party or by which the Company or any of its Subsidiaries is
bound; (vi) the Company must have delivered to the Trustee an opinion of counsel
to the effect that after the 91st day following the deposit, the trust funds
will not be subject to the effect of any applicable bankruptcy, insolvency,
reorganization or similar laws affecting creditors' rights generally; (vii) the
Company must deliver to the Trustee an Officers' Certificate stating that the
deposit was not made by the Company with the intent of preferring the Holders of
the Notes over the other creditors of the Company, or with the intent of
defeating, hindering, delaying or defrauding creditors of the Company or others;
and (viii) the Company must deliver to the Trustee an Officers' Certificate and
an opinion of counsel, each stating that
 
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<PAGE>
all conditions precedent provided for relating to the Legal Defeasance or the
Covenant Defeasance have been complied with.
 
TRANSFER AND EXCHANGE
 
    A Holder may, subject to certain restrictions, transfer or exchange Notes in
accordance with the Indenture. The Registrar and the Trustee may require a
Holder, among other things, to furnish appropriate endorsements and transfer
documents and the Company may require a Holder to pay any taxes and fees
required by law or permitted by the Indenture. The Company is not required to
transfer or exchange any Note selected for redemption. Also, the Company is not
required to transfer or exchange any Note for a period of 15 days before a
selection of the Notes to be redeemed.
 
    The registered Holder of a Note will be treated as the owner of it for all
purposes.
 
AMENDMENT, SUPPLEMENT AND WAIVER
 
    Except as provided in the next two succeeding paragraphs, the Indenture, the
Notes or the Subsidiary Guarantees may be amended or supplemented with the
consent of the Holders of at least a majority in principal amount of the Notes
then outstanding (including, without limitation, consents obtained in connection
with a purchase of, or tender offer or exchange offer for, the Notes), and any
existing default or compliance with any provision of the Indenture or the Notes
or the Subsidiary Guarantees may be waived with the consent of the Holders of a
majority in principal amount of the then outstanding Notes (including consents
obtained in connection with a tender offer or exchange offer for the Notes).
 
    Without the consent of each Holder affected, an amendment or waiver may not
(with respect to any Notes held by a non-consenting Holder): (i) reduce the
principal amount of the Notes whose Holders must consent to an amendment,
supplement or waiver, (ii) reduce the principal of or change the fixed maturity
of any Note or alter the provisions with respect to the redemption of the Notes
as described above under "Optional Redemption" or "Repurchase at the Option of
Holders", (iii) reduce the rate of or change the time for payment of interest on
any Note, (iv) waive a Default or Event of Default in the payment of principal
of or premium, if any, or interest on the Notes (except a rescission of
acceleration of the Notes by the Holders of at least a majority in principal
amount of such Notes and a waiver of the payment default that resulted from such
acceleration), (v) make any Note payable in money other than that stated in the
Notes, (vi) make any change in the provisions of the Indenture relating to
waivers of past Defaults or the rights of Holders of the Notes to receive
payments of principal of or premium, if any, or interest on the Notes, (vii)
make any change in the foregoing amendment and waiver provisions or (viii)
except as provided under the third paragraph of "Subsidiary Guarantees" or
"Legal Defeasance and Covenant Defeasance," release a Subsidiary Guarantor, if
any, from its obligations under its Subsidiary Guarantee, if any, or make any
change in a Subsidiary Guaranty, if any, that would adversely affect the
Holders. In addition, any amendment to the provisions of Article 10 of the
Indenture (which relates to subordination) will require the consent of the
Holders of at least 66 2/3% in principal amount of the Notes then outstanding if
such amendment would adversely affect the rights of Holders of such Notes.
However, no amendment may be made to the subordination provisions of the
Indenture that adversely affects the rights of any holder of Senior Debt then
outstanding unless the holders of such Senior Debt (or any group or
representative thereof authorized to give a consent) consents to such change.
 
    Notwithstanding the foregoing, without the consent of any Holder of the
Notes the Company and the Trustee may amend or supplement the Indenture or the
Notes to cure any ambiguity, defect or inconsistency, to provide for
uncertificated Notes in addition to or in place of certificated Notes (provided,
however, that the uncertificated Notes are issued in registered form for
purposes of section 163(f) of the Code, or in a manner such that the
uncertificated Notes are described in Section 163(f)(2)(B) of the Code), to
provide for the assumption of the Company's obligations to Holders of the Notes
in the case of a merger or consolidation, to make any change that would provide
any additional rights or benefits to the
 
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Holders of the Notes or that does not adversely affect the legal rights under
the Indenture of any such Holder, to add Guarantees with respect to the Notes or
to secure the Notes, or to comply with requirements of the Commission in order
to effect or maintain the qualification of the Indenture under the Trust
Indenture Act.
 
CONCERNING THE TRUSTEE
 
    The Indenture contains certain limitations on the rights of the Trustee,
should it become a creditor of the Company, to obtain payment of claims in
certain cases, or to realize on certain property received in respect of any such
claim as security or otherwise. The Trustee will be permitted to engage in other
transactions; however, if it acquires any conflicting interest, it must
eliminate such conflict within 90 days, apply to the Commission for permission
to continue or resign.
 
    The Holders of a majority in principal amount of the then outstanding Notes
will have the right to direct the time, method and place of conducting any
proceeding for exercising any remedy available to the Trustee, subject to
certain exceptions. The Indenture provides that in case an Event of Default
shall occur (which shall not be cured), the Trustee will be required, in the
exercise of its power, to use the degree of care of a prudent man in the conduct
of his own affairs. Subject to such provisions, the Trustee will be under no
obligation to exercise any of its rights or powers under the Indenture at the
request of any Holder of the Notes, unless such Holder shall have offered to
such Trustee security and indemnity satisfactory to it against any loss,
liability or expense.
 
GOVERNING LAW
 
    The Indenture, the Notes and the Subsidiary Guarantees provide that they
will be governed by the laws of the State of New York.
 
CERTAIN DEFINITIONS
 
    Set forth below are certain defined terms used in the Indenture. Reference
is made to the Indenture for a full definition of all such terms, as well as any
other capitalized terms used herein for which no definition is provided.
 
    "ACQUIRED DEBT" means, with respect to any specified Person, (i)
Indebtedness of any other Person existing at the time such other Person is
merged with or into or becomes a Subsidiary of such specified Person, including,
without limitation, Indebtedness incurred in connection with, or in
contemplation of, such other Person merging with or into or becoming a
Subsidiary of such specified Person, and (ii) Indebtedness secured by a Lien
encumbering any asset acquired by such specified Person.
 
    "AFFILIATE" of any specified Person means any other Person directly or
indirectly controlling or controlled by or under direct or indirect common
control with such specified Person. For purposes of this definition, "control"
(including, with correlative meanings, the terms "controlling," "controlled by"
and "under common control with"), as used with respect to any Person, shall mean
the possession, directly or indirectly, of the power to direct or cause the
direction of the management or policies of such Person, whether through the
ownership of voting securities, by agreement or otherwise.
 
    "APPLICABLE PREMIUM" means, with respect to a Note at the redemption date,
the greater of (i) 1% of the principal amount of such Note and (ii) the excess
of (A) the present value at such time of (1) the redemption price of such Note
at August 1, 2003 (such redemption price being described under "--Optional
Redemption"), PLUS (2) all required interest payments (excluding accrued but
unpaid interest) due on such Note through August 1, 2003, computed using a
discount rate equal to the Treasury Rate plus 50 basis points, over (B) the
then-outstanding principal amount of such Note.
 
    "ASSET SALE" means (i) the sale, lease, conveyance or other disposition by
the Company or any of its Restricted Subsidiaries (but excluding the creation of
a Lien) of any assets including, without limitation, by
 
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way of a sale and leaseback (provided that the sale, lease, conveyance or other
disposition of all or substantially all of the assets of the Company and its
Subsidiaries taken as a whole will be governed by the provisions of the
Indenture described above under the caption "--Repurchase at the Option of
Holders-- Change of Control" and/or the provisions described above under the
caption "--Certain Covenants-- Merger, Consolidation, or Sale of Assets" and not
by the provisions described above under "--Repurchase at the Option of
Holders--Asset Sales"), and (ii) the issue or sale by the Company or any of its
Restricted Subsidiaries of Equity Interests of any of the Company's Subsidiaries
(including the sale by the Company or a Restricted Subsidiary of Equity
Interests in an Unrestricted Subsidiary), in the case of either clause (i) or
(ii), whether in a single transaction or a series of related transactions (a)
that have a fair market value in excess of $5 million or (b) for Net Proceeds in
excess of $5 million. Notwithstanding the foregoing, the following shall not be
deemed to be Asset Sales: (i) a transfer of assets by the Company to a
Restricted Subsidiary of the Company or by a Restricted Subsidiary of the
Company to the Company or to another Restricted Subsidiary of the Company, (ii)
an issuance of Equity Interests by a Wholly Owned Restricted Subsidiary of the
Company to the Company or to another Wholly Owned Restricted Subsidiary of the
Company, (iii) the making of a Restricted Payment or Permitted Investment that
is permitted by the covenant described above under the caption "--Certain
Covenants--Restricted Payments"; provided that the sale, lease, conveyance or
other disposition by the Company or any of its Restricted Subsidiaries of an
Investment shall be deemed an Asset Sale, (iv) the abandonment, farm-out, lease
or sublease of undeveloped oil and gas properties in the ordinary course of
business, (v) the trade or exchange by the Company or any Restricted Subsidiary
of the Company of any oil and gas property or interest therein owned or held by
the Company or such Restricted Subsidiary for any oil and gas property or
interest therein owned or held by another Person, including any cash or Cash
Equivalents necessary in order to achieve an exchange of equivalent value;
provided that any such cash or Cash Equivalents received by the Company or such
Restricted Subsidiary will be subject to the provisions described in the second
and third paragraphs under "Repurchase at the Option of Holders--Asset Sales,"
which the Board of Directors of the Company determines in good faith by
resolution to be of approximately equivalent value, (vi) the sale or transfer of
hydrocarbons or other mineral products in the ordinary course of business, (vii)
the sale of oil and gas properties in connection with tax credit transactions
complying with Section 29 or any successor or analogous provisions of the
Internal Revenue Code or (viii) the sale or transfer of surplus or obsolete
equipment in the ordinary course of business.
 
    "ATTRIBUTABLE DEBT" in respect of a sale and leaseback transaction means, at
the time of determination, the present value (discounted at the rate of interest
implicit in such transaction, determined in accordance with GAAP) of the
obligation of the lessee for net rental payments during the remaining term of
the lease included in such sale and leaseback transaction (including any period
for which such lease has been extended or may, at the option of the lessor, be
extended).
 
    "BORROWING BASE" means, as of any date, the aggregate amount of borrowing
availability as of such date under all Credit Facilities that determines
availability on the basis of a borrowing base or other asset-based calculation.
 
    "CAPITAL LEASE OBLIGATION" means, at the time any determination thereof is
to be made, the amount of the liability in respect of a capital lease that would
at such time be required to be capitalized on a balance sheet in accordance with
GAAP.
 
    "CAPITAL STOCK" means (i) in the case of a corporation, corporate stock,
(ii) in the case of an association or business entity, any and all shares,
interests, participations, rights or other equivalents (however designated) of
corporate stock, (iii) in the case of a partnership, partnership interests
(whether general or limited), (iv) in the case of a limited liability company or
similar entity, any membership or similar interests therein and (v) any other
interest or participation that confers on a Person the right to receive a share
of the profits and losses of, or distributions of assets of, the issuing Person.
 
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<PAGE>
    "CASH EQUIVALENTS" means (i) United States dollars, (ii) securities issued
or directly and fully guaranteed or insured by the United States government or
any agency or instrumentality thereof having maturities of not more than twelve
months from the date of acquisition, (iii) certificates of deposit and
eurodollar time deposits with maturities of twelve months or less from the date
of acquisition, bankers' acceptances with maturities not exceeding twelve months
and overnight bank deposits, in each case with any lender party to any of the
Credit Facilities or with any domestic commercial bank having capital and
surplus in excess of $500 million and a Thompson Bank Watch Rating of "B" or
better, (iv) repurchase obligations with a term of not more than seven days for
underlying securities of the types described in clauses (ii) and (iii) above
entered into with any financial institution meeting the qualifications specified
in clause (iii) above, (v) commercial paper having a rating of at least P1 from
Moody's Investors Service, Inc. (or its successor) and a rating of at least A1
from Standard & Poor's Rating Group (or its successor) and (vi) investments in
money market or other mutual funds substantially all of whose assets comprise
securities of types described in clauses (ii) through (v) above.
 
    "CHANGE OF CONTROL" means the occurrence of any of the following:
 
        (i) prior to the first public offering of Voting Stock of the Company,
    either (x) Permitted Holders cease to be the "beneficial owner(s)" (as
    defined in Rules 13d-3 and 13d-5 under the Exchange Act), directly or
    indirectly, of more than 50% of the total voting power of the Voting Stock
    of the Company, or (y) Permitted Holders cease to be entitled by voting
    power, contract or otherwise to elect or cause the election of directors of
    the Company having a majority of the total voting power of the Board or
    Directors, in each case, whether as a result of issuance of securities of
    the Company, any merger, consolidation, liquidation or dissolution of the
    Company, any direct or indirect transfer of securities by any Permitted
    Holder or otherwise (for purposes of this clause (i) and clause (ii) below,
    Permitted Holders shall be deemed to beneficially own any Voting Stock of an
    entity (the "specified entity") held by any other entity (the "parent
    entity") so long as the Permitted Holders beneficially own, directly or
    indirectly, a majority of the Voting Stock of the parent entity;
 
        (ii) following the first public offering of Voting Stock of the Company,
    any "Person" (as such term is used in Sections 13(d) and 14(d) of the
    Exchange Act), other than one or more Permitted Holders, is or becomes the
    beneficial owner (as defined in clause (i) above, except that a Person shall
    be deemed to have "beneficial ownership" of all shares that any such Person
    has the right to acquire within one year), directly or indirectly, of more
    than 50% of the Voting Stock of the Company; PROVIDED that the Permitted
    Holders beneficially own (as defined in clause (i) above), directly or
    indirectly, in the aggregate a lesser percentage of the Voting Stock of the
    Company than such other Person and do not have the right or ability by
    voting power, contract or otherwise to elect or designate for election a
    majority of the Board of Directors;
 
       (iii) the sale, lease, transfer, conveyance or other disposition (other
    than by way of merger or consolidation), in one or a series of related
    transactions, of all or substantially all of the assets of the Company and
    its Subsidiaries taken as a whole to any "Person" or group of related
    Persons (a "Group"); (as such term is used in Sections 13(d) and 14(d) of
    the Exchange Act);
 
        (iv) the adoption of a plan relating to the liquidation or dissolution
    of the Company; and
 
        (v) during any period of two consecutive years, individuals who at the
    beginning of such period constituted the Board of Directors (together with
    any new directors whose election by such Board of Directors or whose
    nomination for election by the shareholders of the Company was approved by a
    vote of a majority of the directors of the Company then still in office who
    were either directors at the beginning of such period or whose election or
    nomination for election was previously so approved) cease for any reason to
    constitute a majority of the Board of Directors then in office.
 
                                       85
<PAGE>
    "COMMISSION" means the Securities and Exchange Commission.
 
    "CONSOLIDATED CASH FLOW" means, with respect to any Person for any period,
the Consolidated Net Income of such Person and its Restricted Subsidiaries for
such period increased by (i) an amount equal to any extraordinary or
non-recurring loss, and any net loss realized in connection with an Asset Sale
(together with any related provision for taxes) to the extent such losses were
included in computing such Consolidated Net Income, PLUS (ii) provision for
taxes based on income or profits of such Person and its Restricted Subsidiaries
for such period, to the extent that such provision for taxes was included in
computing such Consolidated Net Income, PLUS (iii) consolidated interest expense
of such Person and its Restricted Subsidiaries for such period, whether paid or
accrued (including, without limitation, amortization of original issue discount,
non-cash interest payments, the interest component of any deferred payment
obligations, the interest component of all payments associated with Capital
Lease Obligations, imputed interest with respect to Attributable Debt,
commissions, discounts and other fees and charges incurred in respect of letters
of credit or bankers' acceptance financings, and net payments (if any) pursuant
to Interest Rate Hedging Agreements), to the extent that any such expense was
included in computing such Consolidated Net Income, PLUS (iv) depreciation,
depletion and amortization expenses (including amortization of goodwill and
other intangibles) for such Person and its Restricted Subsidiaries for such
period to the extent that such depreciation, depletion and amortization expenses
were included in computing such Consolidated Net Income, PLUS (v) exploration
expenses for such Person and its Restricted Subsidiaries for such period to the
extent such exploration expenses were included in computing such Consolidated
Net Income, PLUS (vi) costs incurred in connection with acquisitions that would
be eligible for capitalization treatment under GAAP, but have been expensed at
the time of incurrence, PLUS (vii) other non-cash charges (excluding any such
non-cash charge to the extent that it represents an accrual of or reserve for
cash charges in any future period or amortization of a prepaid cash expense that
was paid in a prior period) of such Person and its Restricted Subsidiaries for
such period, including, without limitation, any ceiling limitation writedowns
and non-cash losses or charges to net income resulting from the net change in
value of such Person's mark-to-market portfolio of Oil and Gas Commodity Price
Risk Management Contracts, to the extent that such other non-cash charges were
included in computing such Consolidated Net Income, in each case, on a
consolidated basis and determined in accordance with GAAP. Notwithstanding the
foregoing, the provision for taxes on the income or profits of, and the
depreciation, depletion and amortization and other non-cash charges and expenses
of, a Restricted Subsidiary of the relevant Person shall be added to
Consolidated Net Income to compute Consolidated Cash Flow only to the extent
(and in the same proportion) that the Net Income of such Restricted Subsidiary
was included in calculating the Consolidated Net Income of such Person and only
if a corresponding amount would be permitted at the date of determination to be
dividended to such Person by such Restricted Subsidiary without prior
governmental approval (that has not been obtained), and without direct or
indirect restriction pursuant to the terms of its charter and all agreements,
instruments, judgments, decrees, orders, statutes, rules and governmental
regulations applicable to that Restricted Subsidiary or its stockholders.
 
    "CONSOLIDATED NET INCOME" means, with respect to any Person for any period,
the aggregate of the Net Income of such Person and its Restricted Subsidiaries
for such period, on a consolidated basis, determined in accordance with GAAP;
PROVIDED that (i) the Net Income (but not loss) of any Person that is not a
Restricted Subsidiary or that is accounted for by the equity method of
accounting shall be included only to the extent of the amount of dividends or
distributions paid in cash to the referent Person or a Wholly Owned Restricted
Subsidiary thereof, (ii) the Net Income of any Restricted Subsidiary shall be
excluded to the extent that the declaration or payment of dividends or similar
distributions by that Restricted Subsidiary of that Net Income is not at the
date of determination permitted without any prior governmental approval (that
has not been obtained) or, directly or indirectly, by operation of the terms of
its charter or any agreement, instrument, judgment, decree, order, statute, rule
or governmental regulation applicable to that Restricted Subsidiary or its
stockholders, (iii) the Net Income of any Person acquired in a pooling of
interests transaction for any period prior to the date of such acquisition shall
be excluded and (iv) the cumulative effect of a change in accounting principles
shall be excluded; provided, however, that for
 
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purposes of a determination pursuant to the provisions of the covenant described
above under the caption "--Certain Covenants--Restricted Payments", there will
be deducted from the Net Income of the Company and its Restricted Subsidiaries
for such period an amount equal to payments, distributions and dividends paid by
the Company pursuant to clause (7) of the second paragraph of such covenant.
 
    "CONSOLIDATED NET WORTH" means the total of the amounts shown on the balance
sheet of the Company and its consolidated Restricted Subsidiaries, determined on
a consolidated basis in accordance with GAAP, as of the end of the most recent
fiscal quarter of the Company ending prior to the taking of any action for the
purpose of which the determination is being made and for which financial
statements are available (but in no event ending more than 135 days prior to the
taking of such action), as (i) the par or stated value of all outstanding
Capital Stock of the Company, plus (ii) paid-in capital or capital surplus
relating to such Capital Stock plus (iii) any retained earnings or earned
surplus less (A) any accumulated deficit (in each case excluding any minority
interest) and (B) any amounts attributable to Disqualified Stock.
 
    "CREDIT FACILITY" means that certain Credit Agreement, dated as of May 14,
1998, among the Company, Bank One, Oklahoma, N.A., as Agent and lender and the
other parties thereto, including any related notes, guarantees, security or
pledge agreements, collateral documents, instruments and agreements executed by
the Company or any Subsidiary of the Company in connection therewith, and in
each case as amended, restated, modified, renewed, increased, supplemented,
refunded, replaced or refinanced, in whole or in part, from time to time,
whether or not with the same or other lenders or agents and whether provided
under the original Credit Facility or any other credit agreement or indenture.
 
    "CREDIT FACILITIES" means, with respect to the Company, one or more debt
facilities (including, without limitation, the Credit Facility) or commercial
paper facilities with banks or other institutional lenders providing for
revolving credit loans, term loans, production payments, receivables financing
(including through the sale of receivables to such lenders or to special purpose
entities formed to borrow from such lenders against such receivables) or letters
of credit, in each case, as amended, restated, modified, renewed, increased,
supplemented, refunded, replaced or refinanced in whole or in part from time to
time. Indebtedness under Credit Facilities outstanding on the date on which the
Notes are first issued and authenticated under the Indenture (after giving
effect to the use of proceeds thereof) shall be deemed to have been incurred on
such date in reliance on the exception provided by clause (b) of the definition
of Permitted Indebtedness.
 
    "DEFAULT" means any event that is or with the passage of time or the giving
of notice or both would be an Event of Default.
 
    "DESIGNATED SENIOR DEBT" means (i) the Credit Facility and (ii) any other
Senior Debt permitted under the Indenture which, at the date of determination,
has an aggregate principal amount outstanding of, or under which, at the date of
determination, the holders thereof are committed to lend up to, at least $10
million and is specifically designated by the Company in the instrument
evidencing or governing such Senior Debt as "Designated Senior Debt" for
purposes of the Indenture.
 
    "DISQUALIFIED STOCK" means any Capital Stock that, by its terms (or by the
terms of any security into which it is convertible or for which it is
exchangeable) or upon the happening of any event, matures or is mandatorily
redeemable, pursuant to a sinking fund obligation or otherwise, is convertible
or is exchangeable for Indebtedness or Disqualified Stock or redeemable at the
option of the holder thereof, in whole or in part, in each case on or prior to
the date that is 91 days after (x) the date on which the Notes mature or (y) the
date on which there are no Notes outstanding.
 
    "EQUITY INTERESTS" means Capital Stock and all warrants, options or other
rights to acquire Capital Stock (but excluding any debt security that is
convertible into, or exchangeable for, Capital Stock).
 
    "FIXED CHARGES" means, with respect to any Person for any period, the sum,
without duplication, of (i) the consolidated interest expense of such Person and
its Restricted Subsidiaries for such period, whether paid or accrued (including,
without limitation, amortization of original issue discount, non-cash
 
                                       87
<PAGE>
interest payments, the interest component of any deferred payment obligations,
the interest component of all payments associated with Capital Lease
Obligations, imputed interest with respect to Attributable Debt, commissions,
discounts and other fees and charges incurred in respect of letter of credit or
bankers' acceptance financings, and net payments (if any) pursuant to Interest
Rate Hedging Agreements), (ii) the consolidated interest expense of such Person
and its Restricted Subsidiaries that was capitalized during such period, (iii)
any interest expense on Indebtedness of another Person that is guaranteed by
such Person or any of its Restricted Subsidiaries or secured by a Lien on assets
of such Person or any of its Restricted Subsidiaries (whether or not such
guarantee or Lien is called upon) and (iv) the product of (a) all cash dividend
payments (and non-cash dividend payments in the case of a Person that is a
Restricted Subsidiary, unless paid in Equity Interests that are not Disqualified
Stock) on any series of preferred stock of such Person or any of its Restricted
Subsidiaries, times (b) a fraction, the numerator of which is one and the
denominator of which is one minus the then current combined federal, state and
local statutory tax rate of such Person, expressed as a decimal, in each case,
on a consolidated basis and in accordance with GAAP. When calculating the amount
of Fixed Charges, any interest expense attributable to any Person shall be
included in such calculation to the same extent the Net Income of such Person
was included in the calculation of Consolidated Net Income in connection with
calculating the Fixed Charge Coverage Ratio.
 
    "FIXED CHARGE COVERAGE RATIO" means with respect to any Person for any
period, the ratio of the Consolidated Cash Flow of such Person for such period
to the Fixed Charges of such Person for such period. In the event that the
Company or any of its Restricted Subsidiaries incurs, assumes, guarantees or
redeems any Indebtedness (other than revolving credit borrowings) or issues or
redeems preferred stock subsequent to the commencement of the period for which
the Fixed Charge Coverage Ratio is being calculated but prior to the date on
which the calculation of the Fixed Charge Coverage Ratio is made (the
"Calculation Date"), then the Fixed Charge Coverage Ratio shall be calculated
giving pro forma effect to such incurrence, assumption, guarantee or redemption
of Indebtedness, or such issuance or redemption of preferred stock, as if the
same had occurred at the beginning of the applicable four-quarter reference
period. In addition, for purposes of making the computation referred to above,
(i) acquisitions that have been made by the referent Person or any of its
Restricted Subsidiaries, including through mergers or consolidations and
including any related financing transactions, during the four-quarter reference
period or subsequent to such reference period and on or prior to the Calculation
Date (including, without limitation, any acquisition to occur on the Calculation
Date) shall be deemed to have occurred on the first day of the four-quarter
reference period and any cost savings or expense reductions attributable at the
time of such computation or to be attributable in the future to such
acquisition, shall be included in such computation, to the extent that such
adjustments would be permitted under Article 11 of Regulation S-X and
Consolidated Cash Flow for such reference period shall be calculated without
giving effect to clause (iii) of the proviso set forth in the definition of
Consolidated Net Income, (ii) the net proceeds of Indebtedness incurred or
Disqualified Stock issued by the referent Person pursuant to the first paragraph
of the covenant described under the caption "Certain Covenants--Incurrence of
Indebtedness and Issuance of Disqualified Stock" during the four-quarter
reference period or subsequent to such reference period and on or prior to the
Calculation Date shall be deemed to have been received by the referent Person or
any of its Restricted Subsidiaries on the first day of the four-quarter
reference period and applied to its intended use on such date, (iii) the
Consolidated Cash Flow attributable to discontinued operations, as determined in
accordance with GAAP, and operations or businesses disposed of prior to the
Calculation Date, shall be excluded, and (iv) the Fixed Charges attributable to
discontinued operations, as determined in accordance with GAAP, and operations
or businesses disposed of prior to the Calculation Date, shall be excluded, but
only to the extent that the obligations giving rise to such Fixed Charges will
not be obligations of the referent Person or any of its Restricted Subsidiaries
following the Calculation Date.
 
    "GAAP" means generally accepted accounting principles set forth in the
opinions and pronouncements of the Accounting Principles Board of the American
Institute of Certified Public Accountants and statements and pronouncements of
the Financial Accounting Standards Board or in such other statements
 
                                       88
<PAGE>
by such other entity as have been approved by a significant segment of the
accounting profession, which are in effect on the Issuance Date.
 
    "GUARANTEE" means a guarantee (other than by endorsement of negotiable
instruments for collection in the ordinary course of business), direct or
indirect, in any manner (including, without limitation, letters of credit and
reimbursement agreements in respect thereof), of all or any part of any
Indebtedness.
 
    "GUARANTOR SENIOR DEBT" means any Indebtedness of a Subsidiary Guarantor
permitted to be incurred under the terms of the Indenture, unless the instrument
under which such Indebtedness is incurred expressly provides that it is on a
parity with or subordinated in right of payment to the Subsidiary Guarantee of
such Subsidiary Guarantor, including interest accruing subsequent to the filing
of, or which would have accrued but for the filing of, a petition of bankruptcy,
whether or not such interest is an allowable claim in such bankruptcy
proceeding. Notwithstanding anything to the contrary in the foregoing sentence,
Guarantor Senior Debt will not include (a) any liability for federal, state,
local or other taxes owed or owing by any Subsidiary Guarantor, (b) any
obligation of a Subsidiary Guarantor to the Company or to any other Restricted
Subsidiary of the Company, (c) any accounts payable or trade liabilities of a
Subsidiary Guarantor arising in the ordinary course of business (including
instruments evidencing such liabilities), (d) any Indebtedness of a Subsidiary
Guarantor that is incurred in violation of the Indenture, (e) Indebtedness of a
Subsidiary Guarantor which, when incurred and without respect to any election
under Section 1111(b) of Title 11, United States Code, is without recourse to
such Subsidiary Guarantor, and (f) Indebtedness evidenced by a Subsidiary
Guarantee.
 
    "INDEBTEDNESS" means, with respect to any Person, without duplication, (a)
any indebtedness of such Person, whether or not contingent, (i) in respect of
borrowed money, (ii) evidenced by bonds, notes, debentures or similar
instruments, (iii) evidenced by letters of credit (or reimbursement agreements
in respect thereof) or banker's acceptances, (iv) representing Capital Lease
Obligations, (v) representing the balance deferred and unpaid of the purchase
price of any property, except any such balance that constitutes an accrued
expense or trade payable, (vi) representing any obligations in respect of
Interest Rate Hedging Agreements or Oil and Gas Hedging Contracts, and (vii) in
respect of any production payment, (b) all indebtedness of others secured by a
Lien on any asset of such Person (whether or not such indebtedness is assumed by
such Person), (c) obligations of such Person in respect of production
imbalances, (d) Acquired Debt of such Person, (e) Attributable Debt of such
Person, and (f) to the extent not otherwise included in the foregoing, the
guarantee by such Person of any Indebtedness of any other Person.
 
    The amount of Indebtedness of any Person at any date will be the outstanding
balance at such date of all unconditional obligations as described above and the
maximum liability, on the occurrence of the contingency giving rise to the
obligation, of any contingent obligations described above. The amount of
Indebtedness at any date in respect of (i) Credit Facilities shall be the
outstanding principal amount thereof at such date plus any outstanding letters
of credit (or reimbursement obligations in respect thereof) issued thereunder at
such date and (ii) Interest Rate Hedging Agreements or Oil and Gas Hedging
Contracts at such date shall be an amount equal to the net termination value of
such agreement or arrangement giving rise to such obligation that would be
payable at such time.
 
    "INTEREST RATE HEDGING AGREEMENTS" means, with respect to any Person, the
obligations of such Person under (i) interest rate swap agreements, interest
rate cap agreements and interest rate collar agreements and (ii) other
agreements or arrangements designed to protect such Person against fluctuations
in interest rates.
 
    "INVESTMENTS" means, with respect to any Person, all investments by such
Person in other Persons (including Affiliates) in the forms of direct or
indirect loans (including guarantees of Indebtedness or other obligations but
excluding trade credit and other ordinary course advances customarily made in
the Oil and Gas Business), advances (excluding commission, travel and similar
advances to officers and employees made in the ordinary course of business),
capital contributions, purchases or other acquisitions for
 
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consideration of Indebtedness, Equity Interests or other securities, together
with all items that are or would be classified as investments on a balance sheet
prepared in accordance with GAAP; PROVIDED that the following shall not
constitute Investments: (i) an acquisition of assets, Equity Interests or other
securities by the Company for consideration consisting of common equity
securities of the Company, (ii) Interest Rate Hedging Agreements entered into in
accordance with the limitations set forth in clause (g) of the second paragraph
of the covenant described under the caption "--Certain Covenants-- Incurrence of
Indebtedness and Issuance of Disqualified Stock," (iii) Oil and Gas Hedging
Agreements entered into in accordance with the limitations set forth in clause
(h) of the second paragraph of the covenant described under the caption
"--Certain Covenants--Incurrence of Indebtedness and Issuance of Disqualified
Stock", (iv) endorsements of negotiable instruments and documents in the
ordinary course of
business, (v) extensions of trade credit on commercially reasonable terms in
accordance with normal trade practices, and (vi) Cash Equivalents, bonds, notes,
debentures or other securities received in compliance with covenants described
under the caption "--Repurchase at the Option of Holders--Asset Sales." If the
Company or any Restricted Subsidiary of the Company sells or otherwise disposes
of any Equity Interests of any direct or indirect Restricted Subsidiary of the
Company such that, after giving effect to any such sale or disposition, such
entity is no longer a Subsidiary of the Company, the Company shall be deemed to
have made an Investment on the date of any such sale or disposition equal to the
fair market value of the Equity Interests of such Subsidiary not sold or
disposed of.
 
    "LIEN" means, with respect to any asset, any mortgage, lien, pledge, charge,
security interest or encumbrance of any kind in respect of such asset, whether
or not filed, recorded or otherwise perfected under applicable law (including
any conditional sale or other title retention agreement, any lease in the nature
thereof, any option or other agreement to sell or give a security interest in
and any filing of or agreement to give any financing statement under the Uniform
Commercial Code (or equivalent statutes) of any jurisdiction).
 
    "NET INCOME" means, with respect to any Person, the net income (loss) of
such Person, determined in accordance with GAAP and before any reduction in
respect of preferred stock dividends, excluding, however, (i) any gain or loss,
together with any related provision for taxes on such gain or loss, realized in
connection with (a) any Asset Sale (including, without limitation, dispositions
pursuant to sale and leaseback transactions) or (b) the disposition of any
securities by such Person or any of its Restricted Subsidiaries or the
extinguishment of any Indebtedness of such Person or any of its Restricted
Subsidiaries and (ii) any extraordinary or nonrecurring gain or loss, together
with any related provision for taxes on such extraordinary or nonrecurring gain
or loss.
 
    "NET PROCEEDS" means the aggregate cash proceeds received by the Company or
any of its Restricted Subsidiaries in respect of any Asset Sale (including,
without limitation, any cash received upon the sale or other disposition of any
non-cash consideration received in any Asset Sale, but excluding cash amounts
placed in escrow, until such amounts are released to the Company), net of the
direct costs relating to such Asset Sale (including, without limitation, legal,
accounting, investment banking and other professional fees and expenses, and
sales commissions) and any relocation expenses incurred as a result thereof,
taxes paid or payable as a result thereof (after taking into account any
available tax credits or deductions and any tax sharing arrangements), amounts
required to be applied to the repayment of Indebtedness (other than Indebtedness
under any Senior Debt) secured by a Lien on the asset or assets that were the
subject of such Asset Sale and any reserve for adjustment in respect of the sale
price of such asset or assets established in accordance with GAAP and any
reserve established for future liabilities.
 
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    "NON-RECOURSE DEBT" means Indebtedness (i) as to which neither the Company
nor any of its Restricted Subsidiaries (a) provides any guarantee or credit
support of any kind (including any undertaking, guarantee, indemnity, agreement
or instrument that would constitute Indebtedness), or (b) is directly or
indirectly liable (as guarantor or otherwise); and (ii) no default with respect
to which (including any rights that the holders thereof may have to take
enforcement action against an Unrestricted Subsidiary) would permit (upon
notice, lapse of time, or both) any holder of any other Indebtedness of the
Company or any of its Restricted Subsidiaries to declare a default on such other
Indebtedness or cause the payment thereof to be accelerated or payable prior to
its stated maturity; and (iii) the explicit terms of which provide that there is
no recourse against any of the assets of the Company or its Restricted
Subsidiaries.
 
    "OBLIGATIONS" means any principal, interest, penalties, fees,
indemnifications, reimbursements, damages and other liabilities payable under
the documentation governing any Indebtedness.
 
    "OIL AND GAS BUSINESS" means (i) the acquisition, exploration, exploitation,
development, operation and disposition of interests in oil, gas and other
hydrocarbon properties, (ii) the gathering, marketing, distribution, treating,
processing, storage, selling and transporting of any production from such
interests or properties of the Company and its Subsidiaries and the marketing of
oil and gas obtained from unrelated Persons, (iii) any business relating to
exploration for or development, production, treatment, processing, storage,
transportation, gathering or marketing of oil, gas and other minerals and
products produced in association therewith, (iv) any business relating to
oilfield sales and service and (v) any activity that is ancillary to or
necessary or appropriate for the activities described in clauses (i) through
(iv) of this definition.
 
    "OIL AND GAS HEDGING CONTRACTS" means any oil and gas purchase or commodity
price risk management hedging agreement, and other agreement or arrangement,
entered into in the ordinary course of business, in each case, that is designed
to provide protection against oil and gas price fluctuations.
 
    "PARI PASSU INDEBTEDNESS" means Indebtedness that ranks PARI PASSU in right
of payment to the Notes.
 
    "PERMITTED HOLDERS" means (i) any stockholder of the Company on the Issue
Date; (ii) family members or relatives of the persons described in clause (i);
(iii) any trusts created for the benefit of the persons described in clauses (i)
or (ii); (iv) in the event of the incompetence or death of any of the persons
described in clauses (i) or (ii), such person's estate, executor, administrator,
committee or other personal representatives or beneficiaries; and (v) any
Permitted Holder Subsidiary.
 
    "PERMITTED HOLDER SUBSIDIARY" means, with respect to any Permitted Holder,
(i) any corporation more than 50% of the outstanding voting stock of which is
owned, directly or indirectly, by one or more Permitted Holders, or by one or
more other Permitted Holder Subsidiaries of such Permitted Holders, or by one or
more Permitted Holders and one or more other Permitted Holder Subsidiaries of
such Permitted Holders, (ii) any general partnership, limited liability company,
joint venture or similar entity more than 50% of the outstanding partnership,
membership or similar interest of which is owned directly or indirectly, by one
or more Permitted Holders, or by one or more other Permitted Holder Subsidiaries
of such Permitted Holders, or by one or more Permitted Holders and one or more
other Permitted Holder Subsidiaries of such Permitted Holders and (iii) any
limited partnership of which one or more Permitted Holders or any Permitted
Holder Subsidiary of such Permitted Holders is a general partner.
 
    "PERMITTED INDEBTEDNESS" has the meaning given in the covenant described
under the caption "--Certain Covenants--Incurrence of Indebtedness and Issuance
of Disqualified Stock."
 
    "PERMITTED INVESTMENTS" means (a) any Investment in the Company or in a
Restricted Subsidiary of the Company; (b) any Investment in Cash Equivalents;
(c) any Investment by the Company or any Restricted Subsidiary of the Company in
a Person if, as a result of such Investment and any related transactions that at
the time of such Investment are contractually mandated to occur, (i) such Person
becomes a Restricted Subsidiary of the Company or (ii) such Person is merged,
consolidated or amalgamated with or into, or transfers or conveys all or
substantially all of its assets to, or is liquidated into, the Company or a
Restricted
 
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Subsidiary of the Company; (d) any Investment made as a result of the receipt of
non-cash portion of the Cash Consideration from an Asset Sale that was made
pursuant to and in compliance with the covenant described above under the
caption "--Repurchase at the Option of Holders--Asset Sales" or not constituting
an Asset Sale by reason of the 5 million threshold contained in the definition
thereof; (e) any Investment by the Company in any Person engaged in the Oil and
Gas Business or assets used in the Oil and Gas Business in exchange for Equity
Interests in the Company (other than Disqualified Stock), (f) shares of Capital
Stock received in connection with any good faith settlement of a bankruptcy
proceeding involving a trade creditor, (g) Interest Rate Hedging Agreements or
Oil and Gas Hedging Contracts; (h) loans and advances to employees in the
ordinary course of business for bona fide business purposes; (i) operating
agreements, joint ventures, partnership agreements, working interests, royalty
interests, mineral leases, processing agreements, farm-out or farm-in
agreements, contracts for the sale, transportation or exchange of oil and
natural gas, unitization agreements, pooling arrangements, area of mutual
interest agreements, production sharing agreements or other similar or customary
agreements, transactions, properties, interests or arrangements, and Investments
and expenditures in connection therewith or pursuant thereto, in each case made
or entered into in the ordinary course of the Oil and Gas Business, excluding
however, Investments in corporations other than any Investment received pursuant
to the Asset Sale provision; and (j) any other Investments in any Person or
Persons not otherwise permitted to be made pursuant to clauses (a)-(i) above,
when taken together with all other Investments made pursuant to this clause (j)
that are at the time outstanding, having an aggregate amount (such amount to be
calculated on a cost basis) not to exceed the greater of (i) $15 million and
(ii) 5% of Total Assets, as calculated at the time of such Investment.
 
    "PERMITTED LIENS" means
 
        (i) Liens securing Indebtedness of a Subsidiary or Liens securing Senior
    Debt that is outstanding on the date of issuance of the Notes and Liens
    securing Senior Debt that is permitted by the terms of the Indenture to be
    incurred;
 
        (ii) Liens in favor of the Company or any Restricted Subsidiary;
 
       (iii) Liens on property existing at the time of acquisition thereof by
    the Company or any Subsidiary of the Company and Liens on property or assets
    of a Subsidiary existing at the time it became a Subsidiary, provided that
    such Lien was not created in contemplation of the acquisition of the
    property, and provided further that no such Lien shall extend to any assets
    other than the acquired property or the property of the acquired Subsidiary;
 
        (iv) Liens incurred on deposits made in the ordinary course of business
    in connection with workers' compensation, unemployment insurance or other
    kinds of social security, or to secure the payment or performance of
    tenders, statutory or regulatory obligations, surety or appeal bonds,
    performance bonds or other obligations of a like nature incurred in the
    ordinary course of business (including lessee or operator obligations under
    statutes, governmental regulations or instruments related to the ownership,
    exploration and production of oil, gas and minerals on state or federal
    lands or waters);
 
        (v) Liens existing on the date of the Indenture;
 
        (vi) Liens for taxes, assessments or governmental charges or claims that
    are not yet delinquent or that are being contested in good faith by
    appropriate proceedings promptly instituted and diligently concluded,
    PROVIDED that any reserve or other appropriate provision as shall be
    required in conformity with GAAP shall have been made therefor;
 
       (vii) statutory liens of landlords, mechanics, suppliers, vendors,
    warehousemen, carriers or other like Liens arising in the ordinary course of
    business;
 
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<PAGE>
      (viii) judgment Liens not giving rise to an Event of Default so long as
    any appropriate legal proceeding that may have been duly initiated for the
    review of such judgment shall not have been finally terminated or the period
    within which such proceeding may be initiated shall not have expired;
 
        (ix) Liens on, or related to, properties or assets to secure all or part
    of the costs incurred in the ordinary course of the Oil and Gas Business for
    the exploration, exploitation, drilling, development, production, gathering,
    processing, transportation, marketing, storage or operation thereof;
 
        (x) Liens on pipeline or pipeline facilities that arise under operation
    of law;
 
        (xi) Liens arising under operating agreements, joint venture agreements,
    partnership agreements, oil and gas leases, farm-out or farm-in agreements,
    division orders, contracts for the sale, transportation or exchange of oil
    or natural gas, unitization and pooling declarations and agreements, area of
    mutual interest agreements and other agreements that are customary in the
    Oil and Gas Business;
 
       (xii) Liens reserved in oil and gas mineral leases for bonus or rental
    payments and for compliance with the terms of such leases;
 
      (xiii) Liens securing the Notes;
 
       (xiv) Liens constituting survey exceptions, encumbrances, easements, and
    reservations of, and rights to others for, rights-of-way, zoning and other
    restrictions as to the use of real properties, and minor defects of title
    which, in the case of any of the foregoing, do not secure the payment of
    borrowed money, and in the aggregate do not materially adversely affect the
    value of the assets of the Company and its Restricted Subsidiaries, taken as
    a whole, or materially impair the use of such properties for the purposes
    for which such properties are held by the Company or such subsidiaries;
 
       (xv) any interest or title of a lessor under any Capital Lease Obligation
    or operating lease;
 
       (xvi) Liens resulting from the deposit of funds or evidences of
    Indebtedness in trust for the purpose of defeasing Indebtedness of the
    Company or any of the Restricted Subsidiaries;
 
      (xvii) Liens securing obligations under Interest Rate Hedging Agreements
    or Oil and Gas Commodity Price Risk Management Contracts;
 
      (xviii) Liens upon specific items of inventory or other goods and proceeds
    of the Company or any Restricted Subsidiary securing the Company's or such
    Restricted Subsidiary's, as the case may be, obligations in respect of
    bankers' acceptances issued or created for the account of the Company or
    such Restricted Subsidiary, as the case may be, to facilitate the purchase,
    shipment or storage of such inventory or other goods;
 
       (xix) Liens securing reimbursement obligations with respect to commercial
    letters of credit which encumber documents and other property relating to
    such letters of credit and products and proceeds thereof;
 
       (xx) Liens encumbering property or assets under construction arising from
    progress or partial payments by a customer of the Company or its Restricted
    Subsidiaries relating to such property or assets;
 
       (xxi) Liens encumbering deposits made to secure Obligations arising from
    statutory, regulatory, contractual or warranty requirements of the Company
    or any of its Restricted Subsidiaries, including rights of offset and
    set-off;
 
      (xxii) Liens securing Purchase Money Debt; provided however that the
    related Purchase Money Debt shall not be secured by any property or assets
    of the Company or any Restricted Subsidiary other than the property and
    assets acquired by the Company with the proceeds of such Purchase Money
    Debt;
 
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<PAGE>
      (xxiii) Liens on the Capital Stock of Unrestricted Subsidiaries;
 
      (xxiv) Liens to secure any Permitted Refinancing Debt, provided that the
    Indebtedness so exchanged, extended, refinanced, renewed, replaced, defeased
    or refunded was secured by Liens permitted pursuant to clause (iii) or (v)
    of this definition, provided however, that (a) such new Liens shall be
    limited to all or part of the same property that secured the original Lien,
    plus improvements on the property and (b) the Permitted Refinancing Debt
    secured by such Lien at such time is not increased to any amount greater
    than the sum of (x) the outstanding principal amount or, if greater, the
    committed amount of the Indebtedness secured by Liens described under clause
    (iii) or (v) of this definition at the time the original Lien became a Lien
    permitted in accordance with the Indenture and (y) an amount necessary to
    pay any fees and expenses, including premiums, related to such exchange,
    extension, refinancing, renewal, replacement, defeasement or refunding;
 
      (xxv) Liens securing Attributable Debt under any sale and leaseback
    transaction permitted by the terms of the Indenture, but only on the
    property subject to such sale and leaseback transaction; and
 
      (xxvi) Liens not otherwise permitted by clauses (i) through (xxv) that are
    incurred in the ordinary course of business of the Company or any Subsidiary
    with respect to obligations that do not exceed $5 million at any one time
    outstanding.
 
    "PERMITTED REFINANCING DEBT" means any Indebtedness of the Company or any of
its Restricted Subsidiaries issued in exchange for, or the net proceeds of which
are used to extend, refinance, renew, replace, defease or refund other
Indebtedness (other than Indebtedness incurred under a Credit Facility) of the
Company or any of its Restricted Subsidiaries; PROVIDED that: (i) the principal
amount of such Permitted Refinancing Debt does not exceed the principal amount
of the Indebtedness so extended, refinanced, renewed, replaced, defeased or
refunded (plus the amount of reasonable expenses incurred in connection
therewith (other than increases resulting from the capitalization of interest or
fees)); (ii) such Permitted Refinancing Debt has a final maturity date on or
later than the final maturity date of, and has a Weighted Average Life to
Maturity equal to or greater than the Weighted Average Life to Maturity of, the
Indebtedness being extended, refinanced, renewed, replaced, defeased or
refunded; (iii) if the Indebtedness being extended, refinanced, renewed,
replaced, defeased or refunded is subordinated in right of payment to the Notes
or the Subsidiary Guarantees, as the case may be, such Permitted Refinancing
Debt has a final maturity date later than the final maturity date of, and is
subordinated in right of payment to, the Notes or the Subsidiary Guarantees, as
the case may be, on terms at least as favorable taken as a whole to the Holders
of the Notes, or the Subsidiary Guarantees, as the case may be, as those
contained in the documentation governing the Indebtedness being extended,
refinanced, renewed, replaced, defeased or refunded; and (iv) such Indebtedness
is incurred either by the Company or by the Restricted Subsidiary who is the
obligor on the Indebtedness being extended, refinanced, renewed, replaced,
defeased or refunded.
 
    "PERSON" means any individual, corporation, partnership, joint venture,
association, joint-stock company, trust, unincorporated organization, government
or any agency or political subdivision thereof or any other entity.
 
    "PURCHASE MONEY DEBT" means Indebtedness incurred in connection with the
purchase by the Company or any of its Subsidiaries of any equipment, real or
personal property, or any other asset, other than Equity Interests of any Person
(i) as to which the obligee expressly waives the provisions of Section 1111 (b)
of Title 11, United States Code; (ii) as to which neither the Company nor any of
its Restricted Subsidiaries (a) provides any guarantee or credit support of any
kind (including any undertaking, guarantee, indemnity, agreement or instrument
that would constitute Indebtedness), or (b) is directly or indirectly liable (as
guarantor or otherwise) other than the pledge of the equipment, real or personal
property or other assets acquired with the proceeds of such Indebtedness; (iii)
no default with respect to which (including any rights that the holders thereof
may have to take enforcement actions against an Unrestricted Subsidiary) would
permit (upon notice, lapse of time, or both) any holder of any other
 
                                       94
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Indebtedness of the Company or any of its Restricted Subsidiaries to declare a
default on such other Indebtedness or cause the payment thereof to be
accelerated or payable prior to its stated maturity; and (iv) the explicit terms
of which provide that there is no recourse against any of the assets of the
Company or its Restricted Subsidiaries, other than recourse against the
equipment, real or personal property or other assets acquired with the proceeds
of such Indebtedness.
 
    "RESTRICTED INVESTMENT" means an Investment other than a Permitted
Investment.
 
    "RESTRICTED SUBSIDIARY" means any direct or indirect Subsidiary of the
Company that is not an Unrestricted Subsidiary.
 
    "SENIOR DEBT" means (i) Indebtedness of the Company or any Subsidiary of the
Company under or in respect of any Credit Facility, whether for principal,
interest (including interest accruing after the filing of a petition initiating
any proceeding pursuant to any bankruptcy law, whether or not the claim for such
interest is allowed as a claim in such proceeding), reimbursement obligations,
fees, commissions, expenses, indemnities or other amounts, and (ii) any other
Indebtedness permitted under the terms of the Indenture, unless the instrument
under which such Indebtedness is incurred expressly provides that it is on a
parity with or subordinated in right of payment to the Notes. Notwithstanding
anything to the contrary in the foregoing sentence, Senior Debt will not include
(w) any liability for federal, state, local or other taxes owed or owing by the
Company, (x) any Indebtedness of the Company to any of its Subsidiaries or other
Affiliates, (y) any trade payables or (z) any Indebtedness that is incurred in
violation of the Indenture (other than Indebtedness under (i) the Credit
Facility or (ii) any other Credit Facility that is incurred on the basis of a
representation by the Company to the applicable lenders that it is permitted to
incur such Indebtedness under the Indenture).
 
    "SUBSIDIARY" means, with respect to any Person, (i) any corporation,
association or other business entity of which more than 50% of the total voting
power of shares of Capital Stock, entitled (without regard to the occurrence of
any contingency) to vote in the election of directors, managers or trustees
thereof is at the time owned or controlled, directly or indirectly, by such
Person or one or more of the other Subsidiaries of that Person (or a combination
thereof) and (ii) any partnership (a) the sole general partner or the managing
general partner of which is such Person or a Subsidiary of such Person or (b)
the only general partners of which are such Person or one or more Subsidiaries
of such Person (or any combination thereof).
 
    "SUBSIDIARY GUARANTEE" means any guarantee of any Subsidiary of the Company
under the Indenture and the Notes in accordance with the provisions of the
Indenture.
 
    "SUBSIDIARY GUARANTORS" means each Restricted Subsidiary of the Company
existing on the date of the Indenture (such Subsidiaries being Continental Gas,
Inc. and Continental Crude Co.), and any future Restricted Subsidiary of the
Company that executes a Subsidiary Guarantee in accordance with the provisions
of the Indenture, and, in each case, their respective successors and assigns.
 
    "TOTAL ASSETS" means, with respect to any Person, the total consolidated
assets of such Person and its Restricted Subsidiaries, as shown on the most
recent balance sheet of such Person.
 
    "TREASURY RATE" means the yield to maturity at the time of computation of
United States Treasury securities with a constant maturity (as compiled and
published in the most recent Federal Reserve Statistical Release H.15(519) which
has become publicly available at least two Business Days prior to the redemption
date (or, if such Statistical Release is no longer published, any publicly
available source or similar market data)) most nearly equal to the period from
the redemption date to August 1, 2003; PROVIDED that if the period from the
redemption date to August 1, 2003 is not equal to the constant maturity of a
United States Treasury security for which a weekly average yield is given, the
Treasury Rate shall be obtained by linear interpolation (calculated to the
nearest one-twelfth of a year) from the weekly average yields of United States
Treasury securities for which such yields are given, except that if the period
from
 
                                       95
<PAGE>
the redemption date to August 1, 2003 is less than one year, the weekly average
yield on actually traded United States Treasury securities adjusted to a
constant maturity of one year shall be used.
 
    "UNRESTRICTED SUBSIDIARY" means (i) any Subsidiary of the Company which at
the time of determination shall be an Unrestricted Subsidiary (as designated by
the Board of Directors of the Company, as provided below) and (ii) any
Subsidiary of an Unrestricted Subsidiary. The Board of Directors of the Company
may designate any Subsidiary of the Company (including any newly acquired or
newly formed Subsidiary or a Person becoming a Subsidiary through merger or
consolidation or Investment therein) to be an Unrestricted Subsidiary only if
(a) such Subsidiary does not own any Capital Stock of, or own or hold any Lien
on any property of, any other Subsidiary of the Company which is not a
Subsidiary of the Subsidiary to be so designated or otherwise an Unrestricted
Subsidiary; (b) all the Indebtedness of such Subsidiary shall, at the date of
designation, and will at all times thereafter, consist of Non-Recourse Debt; (c)
the Company certifies that such designation complies with the limitations of the
"Restricted Payments" covenant; (d) such Subsidiary, either alone or in the
aggregate with all other Unrestricted Subsidiaries, does not operate, directly
or indirectly, all or substantially all of the business of the Company and its
Subsidiaries; (e) such Subsidiary does not, directly or indirectly, own any
Indebtedness of or Equity Interest in, and has no investments in, the Company or
any Restricted Subsidiary; (f) such Subsidiary is a Person with respect to which
neither the Company nor any of its Restricted Subsidiaries has any direct or
indirect obligation to maintain or preserve such Person's financial condition or
to cause such Person to achieve any specified levels of operating results; and
(g) on the date such Subsidiary is designated an Unrestricted Subsidiary, such
Subsidiary is not a party to any agreement, contract, arrangement or
understanding with the Company or any Restricted Subsidiary with terms
substantially less favorable to the Company or such Restricted Subsidiary than
those that might have been obtained from Persons who are not Affiliates of the
Company. Any such designation by the Board of Directors of the Company shall be
evidenced to the Trustee by filing with the Trustee a resolution of the Board of
Directors of the Company giving effect to such designation and an Officers'
Certificate certifying that such designation complied with the foregoing
conditions. If, at any time, any Unrestricted Subsidiary would fail to meet the
foregoing requirements as an Unrestricted Subsidiary, if shall thereafter cease
to be an Unrestricted Subsidiary for purposes of the Indenture and any
Indebtedness of such Subsidiary shall be deemed to be incurred as of such date.
The Board of Directors of the Company may designate any Unrestricted Subsidiary
to be a Restricted Subsidiary; PROVIDED, that (i) immediately after giving
effect to such designation, no Default or Event of Default shall have occurred
and be continuing or would occur as a consequence thereof and the Company could
incur at least $1.00 of additional Indebtedness (excluding Permitted
Indebtedness) pursuant to the first paragraph of the "Incurrence of Indebtedness
and Issuance of Disqualified Stock" covenant on a pro forma basis taking into
account such designation and (ii) such Subsidiary executes a Subsidiary
Guarantee pursuant to the terms of the Indenture.
 
    "VOTING STOCK" of an entity means all classes of Capital Stock of such
entity then outstanding and normally entitled to vote in the election of
directors or all interests in such entity with the ability to control the
management or actions of such entity.
 
    "WEIGHTED AVERAGE LIFE TO MATURITY" means, when applied to any Indebtedness
at any date, the number of years obtained by dividing (i) the sum of the
products obtained by multiplying (a) the amount of each then remaining
installment, sinking fund, serial maturity or other required payments of
principal, including payment at final maturity, in respect thereof, by (b) the
number of years (calculated to the nearest one-twelfth) that will elapse between
such date and the making of such payment, by (ii) the then outstanding principal
amount of such Indebtedness.
 
    "WHOLLY OWNED RESTRICTED SUBSIDIARY" of any Person means a Restricted
Subsidiary of such Person all of the outstanding Capital Stock or other
ownership interests of which (other than directors' qualifying shares) shall at
the time be owned, directly or indirectly, by such Person or by one or more
Wholly Owned Restricted Subsidiaries of such Person.
 
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<PAGE>
BOOK-ENTRY; DELIVERY AND FORM
 
    The certificates representing the New Notes will initially be represented by
one or more permanent global Notes in definitive, fully registered form without
interest coupons (each a "Restricted Global Note"; and together with the
Regulation S Global Note, the "Global Notes") and will be deposited with the
Trustee as custodian for, and registered in the name of a nominee of, DTC. Old
Notes sold in offshore transactions in reliance on Regulation S under the
Securities Act were initially represented by one or more temporary global Notes
in definitive, fully registered form without interest coupons (each a "Temporary
Regulation S Global Note") and were deposited with the Trustee as custodian for,
and registered in the name of a nominee of, DTC for the accounts of Euroclear
and Cedel Bank. The Temporary Regulation S Global Note is exchangeable for one
or more permanent global Notes (each a "Permanent Regulation S Global Note"; and
together with the Temporary Regulation S Global Notes, the "Regulation S Global
Note") on or after the 40th day following July 24, 1998 upon certification that
the beneficial interests in such global Note are owned by non-U.S. persons.
Prior to the 40th day after the Closing Date, beneficial interests in the
Temporary Regulation S Global Note may only be held through Euroclear or Cedel
Bank.
 
    Ownership of beneficial interests in a Global Note are limited to persons
who have accounts with DTC ("participants") or persons who hold interests
through participants. Ownership of beneficial interests in a Global Note will be
shown on, and the transfer of that ownership will be effected only through,
records maintained by DTC or its nominee (with respect to interests of
participants) and the records of participants (with respect to interests of
persons other than participants). Qualified institutional buyers may hold their
interests in a Restricted Global Note directly through DTC if they are
participants in such system, or indirectly through organizations which are
participants in such system.
 
    Investors may hold their interests in a Regulation S Global Note directly
through Cedel Bank or Euroclear, if they are participants in such systems, or
indirectly through organizations that are participants in such systems. Cedel
Bank and Euroclear will hold interests in the Regulation S Global Notes on
behalf of their participants through DTC.
 
    So long as DTC, or its nominee, is the registered owner or holder of a
Global Note, DTC or such nominee, as the case may be, will be considered the
sole owner or holder of the Notes represented by such Global Note for all
purposes under the Indenture and the Notes. No beneficial owner of an interest
in a Global Note will be able to transfer that interest except in accordance
with DTC's applicable procedures, in addition to those provided for under the
Indenture and, if applicable, those of Euroclear and Cedel Bank.
 
    Payments of the principal of, and interest on, a Global Note will be made to
DTC or its nominee, as the case may be, as the registered owner thereof. Neither
the Company, the Trustee nor any Paying Agent will have any responsibility or
liability for any aspect of the records relating to or payments made on account
of beneficial ownership interests in a Global Note or for maintaining,
supervising or reviewing any records relating to such beneficial ownership
interests.
 
    The Company expects that DTC or its nominee, upon receipt of any payment of
principal or interest in respect of a Global Note, will credit participants'
accounts with payments in amounts proportionate to their respective beneficial
interests in the principal amount of such Global Note as shown on the records of
DTC or its nominee. The Company also expects that payments by participants to
owners of beneficial interests in such Global Note held through such
participants will be governed by standing instructions and customary practices,
as is now the case with securities held for the accounts of customers registered
in the names of nominees for such customers. Such payments will be the
responsibility of such participants.
 
    Transfers between participants in DTC will be effected in the ordinary way
in accordance with DTC rules and will be settled in same-day funds. Transfers
between participants in Euroclear and Cedel Bank will be effected in the
ordinary way in accordance with their respective rules and operating procedures.
 
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    The Company expects that DTC will take any action permitted to be taken by a
holder of Notes (including the presentation of Notes for exchange as described
below) only at the direction of one or more participants to whose account the
DTC interests in a Global Note are credited and only in respect of such portion
of the aggregate principal amount of Notes as to which such participant or
participants has or have given such direction. However, if there is an Event of
Default under the Notes, DTC will exchange the applicable Global Note for
Certificated Notes, which it will distribute to its participants and which may
be legended as set forth under the heading "Transfer Restrictions."
 
    The Company understands that DTC is a limited purpose trust company
organized under the laws of the State of New York, a "banking organization"
within the meaning of New York Banking Law, a member of the Federal Reserve
System, a "clearing corporation" within the meaning of the Uniform Commercial
Code and a "Clearing Agency" registered pursuant to the provisions of Section
17A of the Exchange Act. DTC was created to hold securities for its participants
and facilitate the clearance and settlement of securities transactions between
participants through electronic book-entry changes in accounts of its
participants, thereby eliminating the need for physical movement of certificates
and certain other organizations. Indirect access to the DTC system is available
to others such as banks, brokers, dealers and trust companies that clear through
or maintain a custodial relationship with a participant, either directly or
indirectly ("indirect participants").
 
    Although DTC, Euroclear and Cedel Bank are expected to follow the foregoing
procedures in order to facilitate transfers of interests in a Global Note among
participants of DTC, Euroclear and Cedel Bank, they are under no obligation to
perform or continue to perform such procedures, and such procedures may be
discontinued at any time. Neither the Company nor the Trustee will have any
responsibility for the performance by DTC, Euroclear or Cedel Bank or their
respective participants or indirect participants of their respective obligations
under the rules and procedures governing their operations.
 
    If DTC is at any time unwilling or unable to continue as a depositary for
the Global Notes and a successor depositary is not appointed by the Company
within 90 days, the Company will issue Certificated Notes, which may bear the
legend referred to under "Transfer Restrictions," in exchange for the Global
Notes. Holders of an interest in a Global Note may receive Certificated Notes,
which may bear the legend referred to under "Transfer Restrictions," in
accordance with DTC's rules and procedures in addition to those provided for
under the Indenture.
 
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                     CERTAIN UNITED STATES TAX CONSEQUENCES
 
   
    The following summary describes certain United States federal income and
estate tax consequences resulting from the purchase, ownership, and disposition
of Notes as of the date hereof. It deals only with Notes held as "capital
assets" within the meaning of Section 1221 of the Code by initial purchasers who
purchased Notes at the initial issue price. Further, this discussion does not
address the situation of persons who may be subject to special tax rules,
including, by way of illustration and not limitation, rules applicable to
dealers in securities or currencies, financial institutions, tax-exempt
entities, life insurance companies, persons who hold Notes as a hedge, as part
of a constructive sale, or as a position in a "straddle" for income tax
purposes, or to persons who have a "functional currency" other than the U.S.
Dollar. As used herein, a "United States Holder" means a beneficial owner who is
a citizen or resident of the United States, a corporation, limited liability
company or partnership (unless the Treasury regulations provide otherwise)
created or organized in or under the laws of the United States or any political
subdivision thereof, an estate the income of which is subject to U.S. federal
income taxation regardless of its source, or a trust which is subject to the
supervision of a court within the United States and the control of one or more
U.S. persons as described in Section 7701(a)(30) of the Code. As used herein,
the term "Non-United States Holder" means any person or entity that is not a
United States Holder. An individual may, subject to certain exceptions, be
deemed to be a resident (as opposed to a non-resident alien) of the United
States by virtue of being present in the United States on at least 31 days in
the calendar year and for an aggregate of at least 183 days during a three year
period ending in the current calendar year, determined by counting each day
present in the U.S. during the current calendar year as a full day, each day
present in the U.S. during the immediately preceding calendar year as one-third
of a day, and each day present in the U.S. during the second preceding year as
one-sixth of a day.
    
 
    The discussion set forth below is based upon the provisions of the Code, the
Treasury Regulations, and administrative and judicial decisions thereunder as of
the date hereof, and such authorities may be repealed, revoked or modified with
possible retroactive effect so as to result in federal income tax consequences
different from those discussed below. This summary does not purport to cover all
possible tax consequences associated with the purchase, ownership, and
disposition of Notes, such as any applicable foreign, state, local, or other tax
laws, nor to address all relevant estate or gift tax considerations. PERSONS
CONSIDERING THE PURCHASE, OWNERSHIP, OR DISPOSITION OF NOTES SHOULD CONSULT
THEIR OWN TAX ADVISORS CONCERNING THE FEDERAL INCOME TAX CONSEQUENCES IN LIGHT
OF THEIR PARTICULAR SITUATIONS AS WELL AS ANY CONSEQUENCES ARISING UNDER THE
LAWS OF ANY OTHER TAXING JURISDICTION.
 
TAX CONSEQUENCES TO UNITED STATES HOLDERS
 
    INTEREST ON THE NOTES
 
    The Notes were not issued with original issue discount ("OID"). Except as
described below, interest on a Note will be taxable to a United States Holder as
ordinary income from domestic cources at the time it is paid or accrued in
accordance with the United States Holder's regular method of accounting for
United States tax purposes.
 
    SALE, RETIREMENT, OR OTHER DISPOSITION OF NOTES
 
    Upon the sale, retirement, or other disposition of a Note (including any
sale to the Company in connection with the Company's option to purchase the
Note), a holder will recognize gain or loss equal to the difference between the
amount realized on the sale, retirement, or other disposition and the holder's
tax basis in the Note. Such gain or loss will be capital gain or loss and will
be long-term capital gain or loss if, at the time of the sale, retirement, or
other disposition, the Note has been held for more than one year. The Taxpayer
Relief Act of 1997 includes substantial changes to the federal taxation of
capital gains recognized by certain noncorporate taxpayers, such as individuals,
including a 20% maximum tax rate for
 
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certain gains from the sale of capital assets held for more than 18 months. The
deductibility of capital losses is subject to certain limitations. A holder's
tax basis in a Note will, in general, equal the cost of the Note to the holder.
 
TAX CONSEQUENCES TO NON-UNITED STATES HOLDERS
 
    INTEREST ON NOTES
 
    Subject to the discussion below concerning backup withholding, no
withholding of United States federal income tax will be required with respect to
the payment by the Company or any paying agent of principal or interest on a
Note owned by a Non-United States Holder, provided that the beneficial owner (i)
does not actually or constructively own 10% or more of the total combined voting
power of all classes of stock of the Company entitled to vote within the meaning
of Section 871(h)(3) of the Code and the regulations thereunder, (ii) is not a
controlled foreign corporation related, directly or indirectly, to the Company
through stock ownership, (iii) is not a bank whose receipt of interest on a Note
is described in Section 881(c)(3)(A) of the Code and (iv) satisfies the
statement requirement (described generally below) set forth in Section 871(h)
and Section 881(c) of the Code and the regulations thereunder.
 
    To satisfy the requirement referred to in clause (iv) above, the beneficial
owner of such Note, or a financial institution holding the Note on behalf of
such owner, must provide, in accordance with specified procedures, the Company
or its paying agent with a statement to the effect that the beneficial owner is
not a U.S. person. These requirements will be met if (1) the beneficial owner
provides his name and address, and certifies, under penalties of perjury, that
he is not a U.S. person (which certification may be made on an IRS Form W-8 (or
successor form)) or (2) a financial institution holding the Note on behalf of
the beneficial owner certifies, under penalties of perjury, that such statement
has been received by it and furnishes a paying agent with a copy thereof. Under
finalized Treasury Regulations, the statement requirement referred to in clause
(iv) above may also be satisfied with other documentary evidence for interest
paid after December 31, 1999 with respect to an offshore account or through
certain foreign intermediaries.
 
    In the event any of the above requirements are not satisfied, the Company
will nonetheless not withhold federal income tax on interest paid to a
Non-United States Holder if it receives IRS Form 4224 (or successor form) from
the Non-United States Holder, establishing that such income is effectively
connected with the conduct of a trade or business in the United States, unless
the Company has knowledge to the contrary. Interest paid to a Non-United States
Holder (other than a partnership) which is effectively connected with the
conduct by the holder of a trade or business in the United States is generally
taxed at the graduated rates that are applicable to United States persons. In
the case of a Non-United States Holder that is a corporation, such effectively
connected income may also be subject to the United States federal branch profits
tax (which is generally imposed on a foreign corporation on the deemed
repatriation from the United States of effectively connected earnings and
profits) at a 30% rate (unless the rate is reduced or eliminated by an
applicable income tax treaty and the holder is a qualified resident of the
treaty country). In the case of a partnership that has foreign partners (i.e.,
persons who would be Non-United States Holders if they held the Notes directly),
such effectively connected income allocable to the foreign partner would
generally be subject to United Stated federal withholding tax (regardless of
whether such income is, in fact, distributed to such foreign partner) at a 35%
rate if the foreign partner is a corporation, or at a 39.6% rate if the foreign
partner is not a corporation. Any foreign partner of such a partnership would be
entitled to a credit against his United States federal income tax for his share
of the withholding tax paid by the partnership.
 
    If a Non-United States Holder cannot satisfy the requirements of any of the
above-described exceptions to withholding, payments of interest made to a
Non-United States Holder will be subject to a 30% withholding tax unless the
beneficial owner of the Note provides the Company or its paying agent, as
 
                                      100
<PAGE>
the case may be, with a properly executed IRS Form 1001 (or successor form)
claiming an exemption from or reduced rate of withholding under the benefit of
an applicable tax treaty.
 
    Under the Final Regulations, Non-United States Holders will generally be
required to provide IRS Form W-8 in lieu of IRS Form 4224 or IRS Form 1001,
although alternative documentation may be applicable in certain situations.
 
    SALE, EXCHANGE, REDEMPTION OR OTHER DISPOSITION OF NOTES
 
    A Non-United States Holder will generally not be subject to United States
federal income tax with respect to gain recognized on a sale, exchange,
redemption or other disposition of Notes unless (i) the gain is effectively
connected with a trade or business of the Non-United States Holder in the United
States, (ii) in the case of a Non-United States Holder who is an individual and
holds the Notes as a capital asset, such holder is present in the United States
for 183 or more days in the taxable year of the sale or other disposition and
certain other conditions are met, or (iii) the Non-United States Holder is
subject to tax pursuant to certain provisions of the Code applicable to United
States expatriates. Subject to the discussion below concerning backup
withholding, no withholding of United States federal income tax will be required
with respect to any gain or income realized by a Non-United States Holder upon
the sale, exchange, retirement or other disposition of a Note.
 
    Gains derived by a Non-United States Holder (other than a partnership) from
the sale or other disposition of Notes that are effectively connected with the
conduct by the Holder of a trade or business in the United States are generally
taxed at the graduated rates that are applicable to United States persons. In
the case of a Non-United States Holder that is a corporation, such effectively
connected income may also be subject to the United States branch profits tax. In
the case of a partnership that has foreign partners (i.e., persons who would be
Non-United States Holders if they held the Notes directly) withholding will be
made at a 35% rate if the foreign partner is a corporation, or at 39.6% rate if
the foreign partner is not a corporation. Any foreign partner of such a
partnership would be entitled to a credit against his United States federal
income tax for his share of the withholding tax paid by the partnership. If an
individual Non-United States Holder falls under clause (ii) of the immediately
preceding paragraph of this discussion, he will be subject to a flat 30% tax on
the gain derived from the sale or other disposition, which may be offset by
United States capital losses recognized within the same taxable year as such
sale or other disposition (notwithstanding the fact that he is not considered a
resident of the United States).
 
    FEDERAL ESTATE TAX
 
    A Note beneficially owned by an individual who at the time of death is a
Non-United States Holder will not be subject to United States federal estate tax
as a result of such individual's death, provided that such individual does not
actually or constructively own 10% or more of the total combined voting power of
all classes of stock of the Company entitled to vote within the meaning of
Section 871(h)(3) of the Code and provided that the interest payments with
respect to such Note would not have been, if received at the time of such
individual's death, effectively connected with the conduct of a United States
trade or business by such individual.
 
INFORMATION REPORTING AND BACKUP WITHHOLDING
 
    In general, information reporting requirements will apply to certain
payments of principal and interest on the Notes and to the proceeds of sale of a
Note made to United States Holders other than certain exempt recipients (such as
corporations). A 31% backup withholding tax will apply to such payments if the
United States Holder fails to provide a taxpayer identification number or
certification of foreign or other exempt status or fails to report in full
dividend and interest income.
 
    No information reporting or backup withholding will be required with respect
to payments made by the Company or any paying agent to Non-United States Holders
if a statement described in clause
 
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(iv) under "Tax Consequences to Non-United States Holders--Interest on Notes"
has been received and the payor does not have actual knowledge that the
beneficial owner is a United States person.
 
    Information reporting and backup withholding will not apply if payments of
interest on a Note are made outside the United States to an account maintained
at an office or branch of a United States or foreign bank or other financial
institution, provided certain procedures are in place, and are observed, between
the Company and the foreign bank or financial institution.
 
    Payments on the sale, exchange or other disposition of a Note made to or
through a foreign office of a broker generally will not be subject to backup
withholding. However, payments made by a broker that is a United States person,
a controlled foreign corporation for United States federal income tax purposes,
a foreign person 50 percent or more of whose gross income is effectively
connected with a United States trade or business for a specified three year
period, or (with respect to payments after December 31, 1999) a foreign
partnership with certain connections to the United States, will be subject to
information reporting unless the broker has in its records documentary evidence
that the beneficial owner is not a United States person and certain other
conditions are met, or the beneficial owner otherwise establishes an exemption.
Backup withholding may apply to any payment that such broker is required to
report if the broker has actual knowledge that the payee is a United States
person. Payments to or through the United States office of a custodian, nominee
or agent or the payment by the United States office of a broker of the proceeds
of a sale will be subject to information reporting and backup withholding unless
the Holder certifies, under penalties of perjury, that it is not a United States
person or otherwise establishes an exemption.
 
    For payments made after December 31, 1999, with respect to Notes held by
foreign partnerships, Treasury regulations require that the certification
described in (iv) under "Tax Consequences to Non-United States Holders--Interest
on Notes" above be provided by the partners, rather than by the foreign
partnership, and that the partnership provide certain information, including a
United States taxpayer identification number. A look-through rule will apply in
the case of tiered partnerships.
 
    Non-United States Holders should consult their tax advisors regarding the
application of information reporting and backup withholding in their particular
situations, the availability of an exemption therefrom, and the procedures for
obtaining such an exemption, if available. Any amounts withheld under the backup
withholding rules will be allowed as a refund or credit against the Non-United
States Holder's U.S. federal income tax liability and may entitle such Holder to
a refund, provided the required information is furnished to the IRS.
 
EFFECT OF EXCHANGE
 
    The exchange of Old Notes for New Notes in the Exchange Offer should not
constitute a taxable event to holders. Consequently, no gain or loss will be
recognized by a holder upon receipt of an Exchange Note, the holding period of
the New Note will include the holding period of the Old Note exchanged therefor,
and the basis of the New Note will be the same as the basis of the Note
immediately before the exchange. In any event, persons considering the exchange
of Old Notes for New Notes should consult their own tax advisors concerning the
United States federal income tax consequences in light of their particular
situations as well as any consequences arising under the laws of any other
taxing jurisdiction.
 
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                              PLAN OF DISTRIBUTION
 
    There has previously been only a limited secondary market and no public
market for the Old Notes. The Company does not intend to apply for the listing
of the Notes on a national securities exchange or for their quotation through
The Nasdaq Stock Market. The Notes are eligible for trading in the PORTAL
market. The Company has been advised by the Initial Purchaser that the Initial
Purchaser currently intends to make a market in the Notes; however, the Initial
Purchaser is not obligated to do so and any market making may be discontinued by
any Placement Agent at any time. In addition, such market making activity may be
limited during the Exchange Offer. Therefore, there can be no assurance that an
active market for the Old Notes or the New Notes will develop. If a trading
market does not develop or is not maintained, holders of Notes may experience
difficulty in reselling Notes. If a trading market develops for the Notes,
future trading prices of such securities will depend on many factors, including,
among other things, prevailing interest rates, the Company's results of
operations and the market for similar securities. Depending on such factors,
such securities may trade at a discount from their offering price.
 
    BROKER-DEALERS WHO DID NOT ACQUIRE OLD NOTES AS A RESULT OF MARKET MAKING
ACTIVITIES OR TRADING ACTIVITIES MAY NOT PARTICIPATE IN THE EXCHANGE OFFER.
 
    With respect to resale of New Notes, based on an interpretation by the staff
of the Commission set forth in no-action letters issued to third parties, the
Company believes that a holder (other than a person that is an affiliate of the
Company within the meaning of Rule 405 under the Securities Act or a "broker" or
"dealer" registered under the Exchange Act) who exchanges Old Notes for New
Notes in the ordinary course of business and who is not participating, does not
intend to participate, and has no arrangement or understanding with any person
to participate, in the distribution of the New Notes, will be allowed to resell
the New Notes to the public without further registration under the Securities
Act and without delivering to the purchasers of the New Notes a prospectus that
satisfies the requirements of Section 10 thereof. However, if any holder
acquires New Notes in the Exchange Offer for the purpose of distributing or
participating in a distribution of the New Notes, such holder cannot rely on the
position of the staff of the Commission enunciated in EXXON CAPITAL HOLDINGS
CORPORATION (available May 13, 1988) or similar no-action letters or any similar
interpretive letters and must comply with the registration and prospectus
delivery requirements of the Securities Act in connection with a secondary
resale transaction, unless an exemption from registration is otherwise
available.
 
    As contemplated by the no-action letters mentioned above and the
Registration Rights Agreement, each holder accepting the Exchange Offer is
required to represent to the Company in the Letter of Transmittal that (i) the
New Notes are to be acquired by the holder in the ordinary course of business,
(ii) the holder is not engaging and does not intend to engage in the
distribution of the New Notes, and (iii) the holder acknowledges that, if such
holder participates in the Exchange Offer for the purpose of distributing the
New Notes, such holder must comply with the registration and prospectus delivery
requirements of the Securities Act and cannot rely on the above no-action
letters.
 
    Any broker or dealer registered under the Exchange Act (each a
"Broker-Dealer") who holds Old Notes that were acquired for its own account as a
result of market-making activities or other trading activities (other than Old
Notes acquired directly from the Company or an affiliate of the Company) may
exchange such Old Notes for New Notes pursuant to the Exchange Offer; however,
such Broker-Dealer may be deemed an underwriter within the meaning of the
Securities Act and, therefore, must deliver a prospectus meeting the
requirements of the Securities Act in connection with any resales of the New
Notes received by it in the Exchange Offer, which prospectus delivery
requirement may be satisfied by the delivery by such Broker-Dealer of this
Prospectus. The Company has agreed to cause the Exchange Offer Registration
Statement, of which this Prospectus is a part, to remain continuously effective
for a period of 180 days, if required, from the Exchange Date, and to make this
Prospectus, as amended or supplemented, available to any such Broker-Dealer for
use in connection with resales. Any Broker-Dealer participating in
 
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the Exchange Offer will be required to acknowledge that it will deliver a
prospectus meeting the requirements of the Securities Act in connection with any
resales of New Notes received by it in the Exchange Offer. The delivery by a
Broker-Dealer of a prospectus in connection with resales of New Notes shall not
be deemed to be an admission by such Broker-Dealer that it is an underwriter
within the meaning of the Securities Act. The Company will not receive any
proceeds from any sale of New Notes by a Broker-Dealer.
 
    New Notes received by Broker-Dealers for their own account pursuant to the
Exchange Offer may be sold from time to time in one or more transactions in the
over-the-counter market, in negotiated transactions, through the writing of
options on the New Notes or a combination of such methods of resale, at market
prices prevailing at the time of resale, at prices related to such prevailing
market prices or negotiated prices. Any such resale may be made directly to
purchasers or to or through brokers or dealers who may receive compensation in
the form of commissions or concessions from any such Broker-Dealer and/or the
purchasers of any such New Notes.
 
                                 LEGAL MATTERS
 
    Certain legal matters with respect to the validity of the Notes are being
passed upon for the Company by McAfee & Taft A Professional Corporation,
Oklahoma City, Oklahoma.
 
                                    EXPERTS
 
    The Financial Statements of the Company and of the oil and gas properties
included in the Worland Field Acquisition included in this Prospectus, to the
extent and for the periods indicated in their reports, have been audited by
Arthur Andersen LLP, independent public accountants, and are included herein in
reliance upon the authority of said firm as experts in giving said reports.
 
    Certain information relating to the estimated proved reserves of oil and
natural gas and the related estimates of future net cash flows and present
values thereof as of December 31, 1997, included in this Prospectus and in the
notes to the financial statements of the Company have been prepared by Ryder
Scott Company Petroleum Engineers, Denver, Colorado.
 
                                      104
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                               GLOSSARY OF TERMS
 
    The definitions set forth below shall apply to the indicated terms as used
in this Prospectus. All volumes of natural gas referred to herein are stated at
the legal pressure base to the state or area where the reserves exit and at 60
degrees Fahrenheit and in most instances are rounded to the nearest major
multiple.
 
    BBL.  One stock tank barrel, or 42 U.S. gallons liquid volume.
 
    BCF.  One billion cubic feet of natural gas.
 
    BOE.  One barrel of oil equivalent, determined using the ratio of six Mcf of
natural gas to one Bbl of crude oil, condensate or natural gas liquids.
 
    COMMERCIAL WELL; COMMERCIALLY PRODUCTIVE WELL.  An oil and gas well which
produces oil and gas in sufficient quantities such that proceeds from the sale
of such production exceed production expenses and taxes.
 
    COMPLETION.  The installation of permanent equipment for the production of
oil and natural gas, or in the case of a dry hole, the reporting of abandonment
to the appropriate agency.
 
    DEVELOPED ACREAGE.  The number of acres which are allocated or assignable to
producing wells or wells capable of production.
 
    DEVELOPMENT WELL.  A well drilled within the proved areas of an oil or
natural gas reservoir to the depth of a stratigraphic horizon known to be
productive.
 
    DRY HOLE OR WELL.  A well found to be incapable of producing hydrocarbons in
sufficient quantities such that proceeds from the sale of such production exceed
production expenses and taxes.
 
    EXPLORATORY WELL.  A well drilled to find and produce oil or natural gas
reserves not classified as proved, to find a new reservoir in a field previously
found to be productive of oil or natural gas in another reservoir or to extend a
known reservoir.
 
    FIELD.  An area consisting of a single reservoir or multiple reservoirs all
grouped or related to the same individual geological structural feature and/or
stratigraphic condition.
 
    FORMATION.  A succession of sedimentary beds that were deposited under the
same general geologic conditions.
 
    GROSS ACRES OR GROSS WELLS.  The total acres or wells, as the case may be,
in which a working interest is owned.
 
    HORIZONTAL DRILLING.  A drilling technique that permits the operator to
contact and intersect a larger portion of the producing horizon than
conventional vertical drilling techniques and can result in both increased
production rates and greater ultimate recoveries of hydrocarbons. Horizontal
wells are drilled at angles greater than 70 degrees from vertical.
 
    MBBLS.  One thousand barrels of oil.
 
    MBOE.  One thousand barrels of oil equivalent, determined using the ratio of
one Bbl of crude oil, condensate or natural gas liquids to six Mcf of natural
gas.
 
    MCF.  One thousand cubic feet.
 
    MCFE.  One thousand cubic feet equivalent, determined using the ratio of six
Mcf of natural gas to one Bbl of crude oil, condensate or natural gas liquids.
 
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    MMBBLS.  One million barrels of oil.
 
    MMBOE.  One million barrels of oil equivalent, determined using the ratio of
one Bbl of crude oil, condensate or natural gas liquids to six Mcf of natural
gas.
 
    MMCF.  One million cubic feet.
 
    MMCFE.  One million cubic feet of gas equivalent determined using the ratio
of one Bbl of crude oil, condensate or natural gas liquids to six Mcf of natural
gas.
 
    NET ACRES OR NET WELLS.  The sum of the fractional working interests owned
in gross acres or gross wells, as the case may be.
 
    OIL.  Crude oil, condensate and natural gas liquids.
 
   
    PV-10.  When used with respect to oil and natural gas reserves, the
estimated future gross revenue to be generated from the production of proved
reserves, net of estimated production and future development costs, using prices
and costs in effect as of the date indicated, without giving effect to
non-property related expenses such as general and administrative expenses, debt
service and future income tax expenses or to depreciation, depletion and
amortization, discounted using an annual discount rate of 10%. PV-10, as used in
this Prospectus, is determined on the same basis as the Standardized Measure of
Discounted Future Net Cash Flows as required by the Financial Accounting
Standards Board's Statement of Financial Accounting Standards No. 69 except that
PV-10 gives no effect to future income tax expense because the Company is an "S
Corporation" for federal income tax purposes and is not a federal income
tax-paying entity.
    
 
    PRODUCTIVE WELL.  A well that is found to be capable of producing
hydrocarbons in sufficient quantities such that proceeds from the sale of such
production exceed production expenses and taxes.
 
    PROVED DEVELOPED PRODUCING RESERVES.  Proved developed reserves that are
expected to be recovered from completion intervals currently open in existing
wells and capable of production.
 
   
    PROVED DEVELOPED RESERVES.  Proved reserves that are expected to be
recovered from existing wellbores with existing equipment and operating methods,
whether or not currently producing, without drilling additional wells.
Production of such reserves may require a recompletion includes additional oil
and gas expected to be obtained through the application of fluid injection or
other improved recovery techniques for supplementing the natural forces and
mechanisms of primary recovery only after testing by pilot project or after
operation of an installed program has confirmed through production response that
increased recovery will be achieved.
    
 
   
    PROVED RESERVES.  The estimated quantities of crude oil, natural gas and
natural gas liquids which geological and engineering data demonstrate with
reasonable certainty to be recoverable in future years from known reservoirs
under existing economic and operating conditions. Includes reserves which can be
produced economically through application of improved recovery techniques when
successful testing by a pilot project, the operation of a installed program in
the reservoir, provide support for the engineering analysis on which the project
or program was based.
    
 
    PROVED UNDEVELOPED LOCATION.  A site on which a development well can be
drilled consistent with spacing rules for purposes of recovering proved
undeveloped reserves.
 
   
    PROVED UNDEVELOPED RESERVES.  Proved reserves that are expected to be
recovered from new wells drilled to a known reservoir on undrilled acreage or
from existing wells where a relatively major expenditure is required for
recompletion does not include acreage for which an application of fluid
injection or other improved recovery technique is contemplated unless such
techniques have been proved effective by actual tests in the area and in the
same reservoir.
    
 
                                      106
<PAGE>
    RECOMPLETION.  The completion for production of an existing wellbore in
another formation from that in which the well has been previously completed.
 
    RESERVE LIFE.  A ratio determined by dividing the existing reserves by
production from such reserves for the prior twelve month period.
 
    RESERVOIR.  A porous and permeable underground formation containing a
natural accumulation of producible oil and/or natural gas that is confined by
impermeable rock or water barriers and is individual and separate from other
reserves.
 
    ROYALTY INTEREST.  An interest in an oil and natural gas property entitling
the owner to a share of oil or natural gas production free of costs of
production.
 
    UNDEVELOPED ACREAGE.  Lease acreage on which wells have not been drilled or
completed to a point that would permit the production of commercial quantities
of oil and natural gas regardless of whether such acreage contains proved
reserves.
 
    WELLBORE.  The hole drilled by the bit.
 
    WORKING INTEREST.  The operating interest that gives the owner the right to
drill, produce and conduct operating activities on the property and a share of
production.
 
    WORKOVER.  Operations on a producing well to restore or increase production.
 
                                      107
<PAGE>
                         INDEX TO FINANCIAL STATEMENTS
 
   
<TABLE>
<S>                                                                                    <C>
CONTINENTAL RESOURCES, INC.
 
Report of Independent Public Accountants.............................................        F-2
 
Consolidated Balance Sheets as of December 31, 1996 and 1997, and
  June 30, 1998 (Unaudited)..........................................................        F-3
 
Consolidated Statements of Operations for the Years Ended December 31, 1995, 1996 and
  1997, and for the Six Months Ended June 30, 1997 and 1998 (Unaudited)..............        F-4
 
Consolidated Statements of Stockholders' Equity for the Years Ended December 31,
  1995, 1996 and 1997, and for the Six Months Ended June 30, 1998 (Unaudited)........        F-5
 
Consolidated Statements of Cash Flows for the Years Ended December 31, 1995, 1996 and
  1997, and for the Six Months Ended June 30, 1997 and 1998 (Unaudited)..............        F-6
 
Notes to Consolidated Financial Statements...........................................        F-7
 
BASS ENTERPRISES PRODUCTION CO.
 
Report of Independent Public Accountants.............................................       F-19
 
Statements of Revenues and Direct Operating Expenses of Oil and Gas Properties
  Included in the Purchase Agreement Between Continental Resources, Inc. and Bass
  Enterprises Production Co. for the Years Ended December 31, 1995, 1996 and 1997,
  and for the Six Months Ended June 30, 1997 and for the Five Months Ended May 31,
  1998 (Unaudited)...................................................................       F-20
 
Notes to Statements of Revenues and Direct Operating Expenses of Oil and Gas
  Properties Included in the Purchase Agreement Between Continental Resources, Inc.
  and Bass Enterprises Production Co.................................................       F-21
</TABLE>
    
 
                                      F-1
<PAGE>
                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
To the Board of Directors
of Continental Resources, Inc.:
 
We have audited the accompanying consolidated balance sheets of Continental
Resources, Inc. (an Oklahoma corporation) and subsidiary as of December 31, 1997
and 1996, and the related consolidated statements of operations, stockholders'
equity and cash flows for each of the three years in the period ended December
31, 1997. These consolidated financial statements and the supplementary
information referred to below are the responsibility of the Company's
management. Our responsibility is to express an opinion on these consolidated
financial statements based on our audits.
 
We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
In our opinion, the consolidated financial statements referred to above present
fairly, in all material respects, the financial position of Continental
Resources, Inc. and subsidiary as of December 31, 1997 and 1996, and the results
of their operations and their cash flows for each of the three years in the
period ended December 31, 1997, in conformity with generally accepted accounting
principles.
 
                                                   ARTHUR ANDERSEN LLP
 
Oklahoma City, Oklahoma,
April 22, 1998
 
                                      F-2
<PAGE>
                   CONTINENTAL RESOURCES, INC. AND SUBSIDIARY
                          CONSOLIDATED BALANCE SHEETS
 
                                     ASSETS
 
   
<TABLE>
<CAPTION>
                                                                            DECEMBER 31,              JUNE 30,
                                                                   ------------------------------  --------------
                                                                        1996            1997            1998
                                                                   --------------  --------------  --------------
<S>                                                                <C>             <C>             <C>
                                                                                                    (UNAUDITED)
CURRENT ASSETS:
  Cash...........................................................  $    3,320,130  $    1,301,115  $    1,336,110
  Accounts receivable--
    Oil and gas sales............................................      15,249,670      11,432,273       6,349,546
    Joint interest and other, net................................       5,923,216      13,711,270       9,383,015
  Inventories....................................................       3,556,190       3,548,547       4,962,746
  Prepaid income taxes...........................................       1,764,484        --              --
  Prepaid expenses...............................................       2,072,124         382,725         359,898
  Advances to affiliates.........................................         460,551          59,541      19,624,860
                                                                   --------------  --------------  --------------
      Total current assets.......................................      32,346,365      30,435,471      42,016,174
                                                                   --------------  --------------  --------------
PROPERTY AND EQUIPMENT:
  Oil and gas properties (successful efforts method)--
    Producing properties.........................................     137,403,821     195,785,302     233,600,015
    Nonproducing leaseholds......................................      16,878,253      17,047,404      49,029,303
  Gas gathering and processing facilities........................       8,430,318      20,794,944      22,561,309
  Service properties, equipment and other........................       8,453,513      12,848,701      13,650,019
                                                                   --------------  --------------  --------------
      Total property and equipment...............................     171,165,905     246,476,351     318,840,647
      Less--Accumulated depreciation, depletion and
        amortization.............................................      57,845,700      88,559,352    (103,918,055)
                                                                   --------------  --------------  --------------
      Net property and equipment.................................     113,320,205     157,916,999     214,922,591
                                                                   --------------  --------------  --------------
OTHER ASSETS.....................................................          26,195          33,696         924,487
                                                                   --------------  --------------  --------------
      Total assets...............................................  $  145,692,765  $  188,386,166  $  257,863,253
                                                                   --------------  --------------  --------------
                                                                   --------------  --------------  --------------
 
                                      LIABILITIES AND STOCKHOLDERS' EQUITY
 
CURRENT LIABILITIES:
  Accounts payable...............................................  $   17,635,561  $   19,614,068  $   12,234,726
  Current portion of long-term debt..............................       3,422,447         315,113         315,113
  Revenues and royalties payable.................................       6,807,664       7,497,011       3,653,778
  Accrued liabilities and other..................................       2,212,397       3,164,735       2,951,451
                                                                   --------------  --------------  --------------
      Total current liabilities..................................      30,078,069      30,590,927      19,155,068
                                                                   --------------  --------------  --------------
LONG-TERM DEBT, net of current portion...........................      51,336,696      79,316,913     163,737,232
DEFERRED INCOME TAXES............................................      11,978,570        --              --
OTHER NONCURRENT LIABILITIES.....................................         222,207         213,877         205,862
STOCKHOLDERS' EQUITY:
  Common stock, $1 par value, 75,000 shares authorized, 49,045
    shares issued, 49,041 shares outstanding.....................          49,045          49,045          49,041
  Additional paid-in capital.....................................       2,731,075       2,731,075       2,721,079
  Treasury stock, 4 shares, at cost..............................        --               (10,000)       --
  Retained earnings..............................................      49,297,103      75,494,329      71,994,971
                                                                   --------------  --------------  --------------
      Total stockholders' equity.................................      52,077,223      78,264,449      74,765,091
                                                                   --------------  --------------  --------------
      Total liabilities and stockholders' equity.................  $  145,692,765  $  188,386,166  $  257,863,253
                                                                   --------------  --------------  --------------
                                                                   --------------  --------------  --------------
</TABLE>
    
 
   The accompanying notes are an integral part of these consolidated balance
                                    sheets.
 
                                      F-3
<PAGE>
                   CONTINENTAL RESOURCES, INC. AND SUBSIDIARY
                     CONSOLIDATED STATEMENTS OF OPERATIONS
 
   
<TABLE>
<CAPTION>
                                                                                         FOR THE SIX MONTHS
                                                   FOR THE YEARS ENDED DECEMBER 31         ENDED JUNE 30,
                                                 ------------------------------------  ----------------------
                                                    1995        1996         1997         1997        1998
                                                 ----------  -----------  -----------  ----------  ----------
                                                                                            (UNAUDITED)
<S>                                              <C>         <C>          <C>          <C>         <C>
REVENUES:
  Oil and gas sales............................  $30,575,937 $75,016,352  $78,599,075  $39,135,128 $31,291,036
  Gathering, marketing and processing..........  20,638,962   25,765,782   25,020,764  15,522,153   9,803,962
  Oil and gas service operations...............   6,148,487    6,490,759    6,405,387   3,714,776   3,062,320
                                                 ----------  -----------  -----------  ----------  ----------
    Total revenues.............................  57,363,386  107,272,893  110,025,226  58,372,057  44,157,318
                                                 ----------  -----------  -----------  ----------  ----------
OPERATING COSTS AND EXPENSES:
  Production expenses and taxes................   7,610,850   19,337,987   20,748,414  10,621,812   9,074,294
  Exploration expenses.........................   6,184,239    4,512,355    6,806,491   3,409,693   2,649,514
  Gathering, marketing and processing..........  13,223,476   21,789,861   22,715,336  12,872,663   8,408,877
  Oil and gas service operations...............   3,680,089    4,033,547    3,654,277   1,854,812   1,824,746
  Depreciation, depletion and amortization.....   9,613,747   22,875,743   33,354,430  16,712,641  16,482,968
  General and administrative...................   8,260,416    9,154,725    8,988,984   3,986,405   4,914,457
                                                 ----------  -----------  -----------  ----------  ----------
    Total operating costs and expenses.........  48,572,817   81,704,218   96,267,932  49,458,026  43,354,856
                                                 ----------  -----------  -----------  ----------  ----------
OPERATING INCOME...............................   8,790,569   25,568,675   13,757,294   8,914,031     802,462
                                                 ----------  -----------  -----------  ----------  ----------
OTHER INCOME AND EXPENSES
  Interest income..............................     136,757      311,981      241,456     103,665     779,897
  Interest expense.............................  (2,395,626)  (4,550,488)  (4,803,837) (2,313,297) (5,174,113)
  Other income (expense).......................     410,765      232,947    8,060,863     685,348      92,396
                                                 ----------  -----------  -----------  ----------  ----------
    Total other income and (expenses)..........  (2,669,634)  (4,005,560)   3,498,482  (1,524,284) (4,301,820)
                                                 ----------  -----------  -----------  ----------  ----------
INCOME BEFORE INCOME TAXES.....................   6,120,935   21,563,115   17,255,776   7,389,747  (3,499,358)
INCOME TAX BENEFIT (EXPENSE)...................  (2,251,591)  (8,238,124)   8,941,450   8,941,450      --
                                                 ----------  -----------  -----------  ----------  ----------
NET INCOME.....................................  $3,869,344  $13,324,991  $26,197,226  $16,331,197 $(3,499,358)
                                                 ----------  -----------  -----------  ----------  ----------
                                                 ----------  -----------  -----------  ----------  ----------
EARNINGS PER COMMON SHARE......................  $    78.89  $    271.69  $    534.18  $   333.00  $   (71.36)
                                                 ----------  -----------  -----------  ----------  ----------
                                                 ----------  -----------  -----------  ----------  ----------
</TABLE>
    
 
  The accompanying notes are an integral part of these consolidated financial
                                  statements.
 
                                      F-4
<PAGE>
   
                   CONTINENTAL RESOURCES, INC. AND SUBSIDIARY
                CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
        FOR THE YEARS ENDED DECEMBER 31, 1995, 1996 AND 1997 AND FOR THE
                   SIX MONTHS ENDED JUNE 30, 1998 (UNAUDITED)
    
 
   
<TABLE>
<CAPTION>
                                                            ADDITIONAL                                  TOTAL
                                                 COMMON      PAID-IN      TREASURY     RETAINED     STOCKHOLDERS'
                                                  STOCK      CAPITAL       STOCK       EARNINGS        EQUITY
                                                ---------  ------------  ----------  -------------  -------------
<S>                                             <C>        <C>           <C>         <C>            <C>
BALANCE, December 31, 1994....................  $  49,045  $  2,731,075  $   --      $  32,102,768  $  34,882,888
  Net income..................................     --           --           --          3,869,344      3,869,344
                                                ---------  ------------  ----------  -------------  -------------
BALANCE, December 31, 1995....................     49,045     2,731,075      --         35,972,112     38,752,232
  Net income..................................     --           --           --         13,324,991     13,324,991
                                                ---------  ------------  ----------  -------------  -------------
BALANCE, December 31, 1996....................     49,045     2,731,075      --         49,297,103     52,077,223
  Purchase shares of treasury stock...........     --           --          (10,000)      --              (10,000)
  Net income..................................     --           --           --         26,197,226     26,197,226
                                                ---------  ------------  ----------  -------------  -------------
BALANCE, December 31, 1997....................     49,045     2,731,075     (10,000)    75,494,329     78,264,449
                                                ---------  ------------  ----------  -------------  -------------
  Retirement of treasury stock (unaudited)....         (4)       (9,996)     10,000       --             --
  Net income (unaudited)......................     --           --           --         (3,499,358)    (3,499,358)
                                                ---------  ------------  ----------  -------------  -------------
BALANCE, June 30, 1998 (unaudited)............  $  49,041  $  2,721,079  $   --      $  71,994,971  $  74,765,091
                                                ---------  ------------  ----------  -------------  -------------
                                                ---------  ------------  ----------  -------------  -------------
</TABLE>
    
 
  The accompanying notes are an integral part of these consolidated financial
                                  statements.
 
                                      F-5
<PAGE>
                   CONTINENTAL RESOURCES, INC. AND SUBSIDIARY
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
 
   
<TABLE>
<CAPTION>
                                                                                            FOR THE SIX MONTHS ENDED
                                                        FOR THE YEARS ENDED DECEMBER 31             JUNE 30,
                                                     -------------------------------------  ------------------------
                                                        1995         1996         1997         1997         1998
                                                     -----------  -----------  -----------  -----------  -----------
                                                                                                  (UNAUDITED)
<S>                                                  <C>          <C>          <C>          <C>          <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net income.......................................  $ 3,869,344  $13,324,991  $26,197,226  $16,331,198  $(3,499,358)
  Adjustments to reconcile net income to net cash
    provided by operating activities--
      Depreciation, depletion and amortization.....    9,613,747   22,875,743   33,354,430   16,712,641   16,482,968
      (Gain)/loss on sale of assets................      410,765     (232,947)    (674,091)    (643,279)     (21,696)
      Dry hole cost and impairment of undeveloped
        leases.....................................    2,417,378    1,167,204    1,467,235    2,238,969      129,925
      Deferred income taxes........................    1,618,130    8,238,124  (11,978,570) (11,978,570)     --
      Other noncurrent assets......................      --           --           --          (321,492)      (8,015)
  Changes in current assets and liabilities--
    Increase in accounts receivable................   (5,273,021) (10,238,194)  (3,970,657)   2,164,717    9,410,982
    Decrease/(increase) in inventories.............     (102,471)    (624,052)       7,643     (439,566)  (1,414,199)
    Decrease/(increase) in prepaid income taxes and
      expenses.....................................      (58,964)   1,246,074    3,453,883    2,508,048       22,822
    Increase in accounts payable...................    9,561,493      264,922    1,978,507    3,519,245   (7,379,342)
    Increase/(decrease) in revenues and royalties
      payable......................................     (504,304)   5,230,072      689,347   (1,666,771)  (3,843,233)
    Increase/(decrease) in accrued liabilities and
      other........................................   (2,567,587)     471,680      952,338     (476,926)    (213,284)
                                                     -----------  -----------  -----------  -----------  -----------
        Net cash provided by operating
          activities...............................   18,984,510   41,723,617   51,477,291   27,948,214    9,667,570
                                                     -----------  -----------  -----------  -----------  -----------
CASH FLOWS FROM INVESTING ACTIVITIES:
    Exploration and development....................  (37,212,880) (43,588,567) (63,701,798) (36,120,893) (28,866,225)
    Gas gathering and processing facilities and
      service properties, equipment and other......   (4,720,755)  (3,428,080) (16,759,814)  (5,352,478)  (2,567,683)
    Purchase of producing properties...............  (16,292,607)  (3,323,952)    (475,535)    (204,810) (85,100,000)
    Proceeds from sale of assets...................      204,116      182,040    2,176,948    2,010,800      387,124
    Advances from (to) affiliates..................           --     (460,551)     401,010       (5,809)      16,168
                                                     -----------  -----------  -----------  -----------  -----------
        Net cash used in investing activities......  (58,022,126) (50,619,110) (78,359,189) (39,673,190) (116,130,616)
                                                     -----------  -----------  -----------  -----------  -----------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Purchase of treasury stock.......................      --           --           (10,000)     --           --
  Proceeds from line of credit and other...........   41,034,977   14,144,383   33,493,240   20,000,000  109,014,597
  Repayment of line of credit and other............   (3,041,181)  (3,650,610) (30,570,357) (11,443,740)  (1,625,765)
  Loans from majority stockholder..................      --           --        21,950,000      --          (890,791)
                                                     -----------  -----------  -----------  -----------  -----------
        Net cash provided by financing
          activities...............................   37,993,796   10,493,773   24,862,883    8,556,260  106,498,041
                                                     -----------  -----------  -----------  -----------  -----------
NET INCREASE (DECREASE) IN CASH....................   (1,043,820)   1,598,280   (2,019,015)  (3,168,716)      34,995
CASH, beginning of period..........................    2,765,670    1,721,850    3,320,130    3,320,130    1,301,115
                                                     -----------  -----------  -----------  -----------  -----------
CASH, end of period................................  $ 1,721,850  $ 3,320,130  $ 1,301,115  $   151,414  $ 1,336,110
                                                     -----------  -----------  -----------  -----------  -----------
                                                     -----------  -----------  -----------  -----------  -----------
SUPPLEMENTAL CASH FLOW INFORMATION:
  Interest paid....................................  $ 2,395,626  $ 4,550,488  $ 4,301,977  $ 2,313,297  $ 5,174,113
  Income taxes paid................................  $ 2,713,000  $   589,000  $   300,000  $   --       $23,315,151
 
NONCASH INVESTING AND FINANCING ACTIVITIES:
  Advance to affiliate made with sale of 50%
    interest in producing properties...............      --           --           --           --       $19,581,487
  Satisfaction of note payable to principal
    stockholder through sale of 50% interest in
    producing properties...........................      --           --           --           --       $22,968,513
</TABLE>
    
 
  The accompanying notes are an integral part of these consolidated financial
                                  statements.
 
                                      F-6
<PAGE>
                   CONTINENTAL RESOURCES, INC. AND SUBSIDIARY
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
1. ORGANIZATION:
 
    Continental Resources, Inc. ("CRI") was incorporated in Oklahoma on November
16, 1967, as Shelly Dean Oil Company. On September 23, 1976, the name was
changed to Hamm Production Company. In January 1987, the Company acquired all of
the assets and assumed the debt of Continental Trend Resources, Inc. Affiliated
entities, J.S. Aviation and Wheatland Oil Co. were merged into Hamm Production
Company, and the corporate name was changed to Continental Trend Resources, Inc.
at that time. In 1991, the Company's name was changed to Continental Resources,
Inc.
 
    The Company has one wholly-owned subsidiary, Continental Gas, Inc. ("CGI").
CGI was incorporated in April 1990.
 
    CRI's principal business is oil and natural gas exploration, development and
production. CRI has interests in approximately 1,000 wells and serves as the
operator in the majority of such wells. CRI's operations are primarily in
Oklahoma, North Dakota, South Dakota, Montana, Illinois and Texas.
 
    CGI is engaged principally in natural gas marketing, gathering and
processing activities and operates six gas gathering systems and two gas
processing plants in Oklahoma. In addition, CGI participates with CRI in certain
oil and natural gas wells.
 
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:
 
    BASIS OF PRESENTATION
 
    The accompanying consolidated financial statements include the accounts and
operations of CRI and CGI (collectively the "Company"). All significant
intercompany accounts and transactions have been eliminated in the consolidated
financial statements.
 
    INTERIM FINANCIAL INFORMATION
 
   
    The interim consolidated financial statements as of March 31, 1998, and for
the six months ended June 30, 1997 and 1998, are unaudited, and certain
information and footnote disclosures normally included in financial statements
prepared in accordance with generally accepted accounting principals have been
omitted. In the opinion of management, all adjustments, consisting of normal
recurring adjustments, necessary to fairly present the financial position,
results of operations and cash flows with respect to the consolidated interim
financial statements have been included.
    
 
    ACCOUNTS RECEIVABLE
 
    The Company operates exclusively in the oil and natural gas exploration and
production, gas gathering and processing and gas marketing industries. The
Company's joint interest receivables at December 31, 1996 and 1997, are recorded
net of an allowance for doubtful accounts of approximately $200,000 and
$467,000, respectively, in the accompanying consolidated balance sheets.
 
    INVENTORIES
 
    Inventories consist primarily of tubular goods, production equipment and
crude oil in tanks, which are stated at the lower of average cost or market. At
December 31, 1996 and 1997, tubular goods and production equipment totaled
approximately $2,773,000 and $2,692,000, respectively; crude oil in tanks
totaled approximately $783,000 and $856,000, respectively.
 
                                      F-7
<PAGE>
                   CONTINENTAL RESOURCES, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: (CONTINUED)
    PROPERTY AND EQUIPMENT
 
    The Company utilizes the successful efforts method of accounting for oil and
gas activities whereby costs to acquire mineral interests in oil and gas
properties, to drill and equip exploratory wells that find proved reserves and
to drill and equip development wells are capitalized. These costs are amortized
to operations on a unit-of-production method based on proved developed oil and
gas reserves, allocated property by property, as estimated by petroleum
engineers. Geological and geophysical costs, lease rentals and costs associated
with unsuccessful exploratory wells are expensed as incurred. Nonproducing
leaseholds are periodically assessed for impairment based on exploration results
and planned drilling activity. Maintenance and repairs are expensed as incurred,
except that the costs of replacements or renewals that expand capacity or
improve production are capitalized. Gas gathering systems and gas processing
plants are depreciated using the straight-line method over an estimated useful
life of 14 years. Service properties and equipment and other is depreciated
using the straight-line method over estimated useful lives of 5 to 40 years.
 
    INCOME TAXES
 
    The Company filed a consolidated income tax return based on a May 31 fiscal
tax year end. Through May 31, 1997, deferred income taxes were provided for
temporary differences between financial reporting and income tax bases of assets
and liabilities. The estimated Federal and state income taxes on income or loss
generated between June 1 and December 31 is included in deferred income taxes at
each calendar year end prior to December 31, 1997.
 
    Effective June 1, 1997, the Company converted to an "S-corporation" under
Subchapter S of the Internal Revenue Code. As a result, income taxes
attributable to Federal taxable income of the Company after May 31, 1997, if
any, will be payable by the stockholders of the Company. The effect of
eliminating the deferred tax assets and liabilities were recognized in the
results of operations for the year ended December 31, 1997, the year of
adoption.
 
    EARNINGS PER COMMON SHARE
 
    Earnings per common share includes no dilution and is computed by dividing
income available to common stockholders by the weighted-average number of shares
outstanding for the period. There are no common stock equivalents or securities
outstanding which would result in material dilution. The weighted-average number
of shares used to compute earnings per common share was 49,045 in 1995 and 1996
and 49,042 in 1997.
 
    FUTURES CONTRACTS
 
    CGI, in the normal course of business, enters into fixed price contracts for
either the purchase or sale of natural gas at future dates. Due to fluctuations
in the natural gas market, CGI buys or sells natural gas futures contracts to
hedge the price and basis risk associated with the specifically identified
purchase or sales contracts. CGI accounts for changes in the market value of
futures contracts as a deferred gain or loss until the production month of the
hedged transaction, at which time the gain or loss on the natural gas futures
contract is recognized in the results of operations. At December 31, 1996 and
1997, there were no open natural gas futures contracts. Net gains and losses on
futures contracts are included in gas gathering,
 
                                      F-8
<PAGE>
                   CONTINENTAL RESOURCES, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: (CONTINUED)
marketing and processing revenues in the accompanying consolidated statements of
operations and were immaterial for the years ended December 31, 1995, 1996 and
1997.
 
    GAS BALANCING ARRANGEMENTS
 
    The Company follows the "sales method" of accounting for its gas revenue
whereby the Company recognizes sales revenue on all gas sold to its purchasers,
regardless of whether the sales are proportionate to the Company's ownership in
the property. A liability is recognized only to the extent that the Company has
a net imbalance in excess of their share of the reserves in the underlying
properties. The Company's aggregate imbalance positions at December 31, 1996 and
1997 were not material.
 
    SIGNIFICANT CUSTOMER
 
    During 1995, 1996 and 1997 approximately 13.1%, 41.3% and 46.6%,
respectively, of the Company's total revenue were derived from sales made to a
single customer.
 
    FAIR VALUE OF FINANCIAL INSTRUMENTS
 
    The Company's financial instruments consist primarily of cash, trade
receivables, trade payables and bank debt. The carrying value of cash, trade
receivables and trade payables are considered to be representative of their
respective fair values, due to the short maturity of these instruments. The fair
value of bank debt approximates its carrying value based on the borrowing rates
currently available to the Company for bank loans with similar terms and
maturities.
 
    PRESENTATION
 
    Certain prior year information has been reclassified to conform to the 1997
presentation.
 
    USE OF ESTIMATES
 
    The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates. Of the
estimates and assumptions that affect reported results, the estimate of the
Company's oil and natural gas reserves, which is used to compute depreciation,
depletion, amortization and impairment on producing oil and gas properties, is
the most significant.
 
                                      F-9
<PAGE>
                   CONTINENTAL RESOURCES, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
3. LONG-TERM DEBT:
 
    Long-term debt as of December 31, 1996 and 1997, consists of the following:
 
<TABLE>
<CAPTION>
                                                                               1996           1997
                                                                           -------------  -------------
<S>                                                                        <C>            <C>
Line of credit agreement (a).............................................  $  54,759,143  $  53,725,403
Notes payable to majority stockholder (b)................................       --           21,950,000
Note payable to General Electric Capital Corporation (c).................       --            3,865,962
Capital lease agreements (d).............................................       --               90,661
                                                                           -------------  -------------
  Outstanding debt.......................................................     54,759,143     79,632,026
Less--Current portion....................................................      3,422,447        315,113
                                                                           -------------  -------------
  Total long-term debt...................................................  $  51,336,696  $  79,316,913
                                                                           -------------  -------------
                                                                           -------------  -------------
</TABLE>
 
(a) The line of credit with a bank allows borrowings up to $75,000,000. The
    Company has collateralized the loan with substantially all of its oil and
    natural gas interests, and gathering, marketing and processing properties.
    This loan bears interest at either Wall Street Journal Prime (8.5% at
    December 31, 1997) or Adjusted LIBOR which includes the LIBOR rate (5.9% for
    ninety day LIBOR at December 31, 1997) posted in the Wall Street Journal
    adjusted for a capacity fee. The LIBOR rate can be locked in for thirty,
    sixty or ninety days as determined by the Company through the use of various
    principal tranches; or the Company can elect to leave the interest amount
    based on the Prime interest rate. Interest is payable monthly on Prime
    balances and at the expiration of LIBOR tranches with all outstanding
    principal and interest due at maturity on December 31, 2000.
 
(b) Throughout 1997 (May to December), CRI and CGI entered into various notes
    with the majority stockholder of the Company. These notes bear interest at
    8.25% with interest payments due monthly or quarterly for twenty-four to
    thirty-six months. On December 31, 1997, the notes between CRI and the
    majority shareholder were combined into one note totaling $21,750,000
    bearing interest at 8.25% with interest payments due on a quarterly basis
    for twenty-four months. The balance is to be paid in full by December 31,
    2002. The note between CGI and the majority shareholder bears interest at
    8.25% with interest payments due on a quarterly basis for thirty-six months.
    After the three-year period, the balance owed by CGI can be converted to an
    amortization schedule payable by November 2002. Subsequent to December 31,
    1997, the CGI note was paid in full.
 
(c) In July 1997, the Company borrowed $4,000,000 from General Electric Capital
    Corporation to finance the purchase of an airplane. The note accrues
    interest at 7.91% to be paid in one hundred nineteen (119) consecutive
    monthly installments of principal and interest of $48,341 each and a final
    installment of approximately $48,000. It is secured by the airplane.
 
(d) During 1997, the Company entered into two capital lease agreements to
    purchase a copier and computer equipment. The agreements require monthly
    payments of principal and interest for forty-two and sixty months,
    respectively.
 
                                      F-10
<PAGE>
                   CONTINENTAL RESOURCES, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
3. LONG-TERM DEBT: (CONTINUED)
    The annual maturities of debt subsequent to December 31, 1997, are as
follows:
 
<TABLE>
<S>                                                      <C>
1998...................................................  $  315,113
1999...................................................     338,423
2000...................................................  61,335,261
2001...................................................   7,711,569
2002 and thereafter....................................   9,931,660
                                                         ----------
  Total maturities.....................................  $79,632,026
                                                         ----------
                                                         ----------
</TABLE>
 
4. INCOME TAXES:
 
    The Company follows Statement of Financial Accounting Standards ("SFAS") No.
109, "Accounting for Income Taxes." As mentioned in Note 2, effective June 1,
1997, the Company converted to an S-Corporation resulting in the taxable income
or loss of the Company from that date being reported to the shareholders and
included in their respective Federal and state income tax returns. Accordingly,
the deferred income tax assets and liabilities at May 31, 1997, were eliminated
through recording a provision for income tax benefit. The components of income
tax expense (benefit) are as follows:
 
<TABLE>
<CAPTION>
                                                                          (IN THOUSANDS)
                                                                   1995       1996        1997
                                                                 ---------  ---------  ----------
<S>                                                              <C>        <C>        <C>
Current........................................................  $     633  $  --      $    3,038
Deferred.......................................................      1,619      8,238     (11,979)
                                                                 ---------  ---------  ----------
    Income tax expense (benefit)...............................  $   2,252  $   8,238  $   (8,941)
                                                                 ---------  ---------  ----------
                                                                 ---------  ---------  ----------
</TABLE>
 
    The provision for income taxes differs from an amount computed at the
statutory rates at December 31, as follows:
 
<TABLE>
<CAPTION>
                                                                          (IN THOUSANDS)
                                                                   1995       1996        1997
                                                                 ---------  ---------  ----------
<S>                                                              <C>        <C>        <C>
Federal income tax at statutory rates..........................  $   2,142  $   7,547  $    6,040
State income taxes.............................................        184        647         518
Statutory depletion............................................        (73)     -          -
Nondeductible expenses.........................................          4         21          30
Conversion to S-corporation....................................      -          -         (15,529)
Other..........................................................         (5)        23      -
                                                                 ---------  ---------  ----------
  Income tax expense (benefit).................................  $   2,252  $   8,238  $   (8,941)
                                                                 ---------  ---------  ----------
                                                                 ---------  ---------  ----------
</TABLE>
 
                                      F-11
<PAGE>
                   CONTINENTAL RESOURCES, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
4. INCOME TAXES: (CONTINUED)
    Deferred tax assets and (liabilities) at December 31, 1996, arising from
temporary differences between tax bases and the financial reporting carrying
amounts for certain assets and liabilities are as follows (in thousands):
 
<TABLE>
<S>                                                                 <C>
Exploration and development costs.................................  $ (11,532)
Alternative minimum tax carryforward..............................      1,789
Investment tax credit carryforward................................        717
Net operating loss carryforward...................................      1,836
Income between tax year end and December 31.......................     (5,537)
Other.............................................................        748
                                                                    ---------
                                                                    $ (11,979)
                                                                    ---------
                                                                    ---------
</TABLE>
 
    The investment tax credit carryforward was utilized during the Company's tax
year ended May 31, 1997.
 
5. COMMITMENTS AND CONTINGENCIES:
 
    The Company maintains a defined contribution pension plan for its employees
under which it contributes to the plan 4% of the annual compensation of all
employees at least 21 years old with a minimum of six months service. Pension
expense for the years ended December 31, 1995, 1996 and 1997, was approximately
$144,000, $152,000 and $242,000, respectively.
 
    The Company and other affiliated companies participate jointly in a
self-insurance pool (the "Pool") covering health and workers' compensation
claims made by employees up to the first $50,000 and $500,000, respectively, per
claim. Any amounts paid above these are reinsured through third-party providers.
Premiums charged to the Company are based on estimated costs per employee of the
Pool. Premiums are expensed as incurred. No additional premium assessments are
anticipated for periods prior to December 31, 1997. Property and general
liability insurance is maintained through third-party providers with a $50,000
deductible on each policy.
 
    The Company is involved in various legal proceedings in the normal course of
business, none of which, in the opinion of management, will have a material
adverse effect on the financial position or results of operations of the
Company. The Company has been successful in Federal courts in its lawsuit
against a gas purchaser arising from tortious interference with business
relations. A judgment was awarded for actual and punitive damages under the
Federal lawsuit totaling $30,269,000 plus accrued interest. In May 1996, this
decision was remanded by the U.S. Supreme Court back to the Tenth Circuit Court
of Appeals for further consideration. No amounts were included in the
accompanying financial statements for this judgment as the ultimate outcome was
uncertain at December 31, 1996. During 1997, this lawsuit was settled with an
aggregate judgment of $9,500,000 of which the Company's share was approximately
$7,500,000. It is included in other income in the accompanying statement of
operations for the year ended December 31, 1997.
 
    Due to the nature of the oil and gas business, the Company is exposed to
possible environmental risks. The Company has implemented various policies and
procedures to avoid environmental contamination and risks from environmental
contamination. The Company is not aware of any material potential environmental
issues or claims.
 
                                      F-12
<PAGE>
                   CONTINENTAL RESOURCES, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
6. RELATED PARTY TRANSACTIONS:
 
    The Company, acting as operator on certain properties, utilizes affiliated
companies to provide oilfield services such as drilling and trucking. The total
amount paid to these companies, a portion of which is billed to other interest
owners, was approximately $5,899,000, $5,870,000 and $11,852,000 during the
years ended December 31, 1995, 1996 and 1997, respectively. These services are
provided at amounts which management believes approximate the costs which would
have been paid to an unrelated party for the same services. At December 31, 1996
and 1997, the Company owed approximately $826,000 and $1,094,000, respectively,
to these companies which is included in accounts payable and accrued liabilities
in the accompanying consolidated balance sheets. These companies and other
companies owned by the Company's majority stockholder also own interests in
wells operated by the Company. At December 31, 1996 and 1997, approximately
$461,000 and $336,000, respectively, from affiliated companies is included in
joint interest accounts receivable in the accompanying consolidated balance
sheets.
 
   
    Beginning in 1996, a portion of the Company's Oklahoma, South Dakota, North
Dakota and Montana crude oil production sold by the Company to an unrelated
purchaser. In unrelated transactions, Independent Trading and Transportation
Company ("ITT") an affiliate of the Company, purchased, resold and traded crude
oil at various delivery points. The Company realized no gain or loss on
transactions by ITT.
    
 
    During the years ended December 31, 1996 and 1997, the Company and CGI
advanced certain amounts to affiliates primarily for operating expenditures. The
advances outstanding to affiliates at December 31, 1996 and 1997, totaled
approximately $461,000 and $60,000, respectively. Interest income earned during
the years ended December 31, 1995, 1996 and 1997, was approximately $13,000,
$33,000 and $33,000, respectively, on advances to affiliates.
 
    The Company leases office space under operating leases directly or
indirectly from the majority stockholder. Rents paid associated with these
leases totaled approximately $228,000, $232,000 and $294,000 for the years ended
December 31, 1995, 1996 and 1997, respectively.
 
    During 1997, advances were made to the Company from the majority
stockholder. Interest paid or accrued during the year related to these advances
totaled approximately $744,000.
 
7. IMPAIRMENT OF LONG-LIVED ASSETS:
 
    In March 1995, the Financial Accounting Standards Board issued SFAS No. 121,
"Accounting for the Impairment of Long-Lived Assets and for Long-Lived Assets to
Be Disposed Of." The Company adopted SFAS No. 121 in the year ended December 31,
1996. During 1996 and 1997, the Company reviewed its oil and gas properties
which are maintained under the successful efforts method of accounting, to
identify properties with excess of net book value over projected future net
revenue of such properties. Any such excess net book values identified were
evaluated further considering such factors as future price escalation,
probability of additional oil and gas reserves and a discount to present value.
If an impairment was determined appropriate an additional charge was added to
depreciation, depletion and amortization ("DD&A") expense. The Company
recognized additional DD&A impairment in 1996 and 1997 of approximately
$2,100,000 and $5,000,000, respectively.
 
                                      F-13
<PAGE>
                   CONTINENTAL RESOURCES, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
8. SUPPLEMENTAL OIL AND GAS INFORMATION (UNAUDITED):
 
    PROVED OIL AND GAS RESERVES (UNAUDITED)
 
    The following reserve information was developed from reserve reports as of
December 31, 1996 and 1997, prepared by independent reserve engineers and by the
Company's internal reserve engineers and set forth the changes in estimated
quantities of proved oil and gas reserves of the Company during each of the
three years presented. Information prior to December 31, 1996, was determined
from the Company's production, drilling, acquisition and sale data as applied to
the December 31, 1996, reserve reports as reports on a December 31 year-end
basis prior to 1996 were not available.
 
<TABLE>
<CAPTION>
                                                                                                 CRUDE OIL AND
                                                                                 NATURAL GAS      CONDENSATE
                                                                                   (MMCF)     (BBLS IN THOUSANDS)
                                                                                 -----------  -------------------
<S>                                                                              <C>          <C>
Proved reserves as of December 31, 1994........................................      55,900            7,591
  Revisions of previous estimates..............................................      --               --
  Extensions, discoveries and other additions..................................       4,747            4,150
  Production...................................................................      (5,880)          (1,199)
  Sale of minerals in place....................................................      --               --
  Purchase of minerals in place................................................          53            6,959
                                                                                 -----------          ------
Proved reserves as of December 31, 1995........................................      54,820           17,501
  Revisions of previous estimates..............................................      --               --
  Extensions, discoveries and other additions..................................       2,232            4,874
  Production...................................................................      (6,527)          (2,888)
  Sale of minerals in place....................................................        (387)            (236)
  Purchase of minerals in place................................................         397              241
                                                                                 -----------          ------
Proved reserves as of December 31, 1996........................................      50,535           19,492
  Revisions of previous estimates..............................................       3,640            6,731
  Extensions, discoveries and other additions..................................       2,903            2,072
  Production...................................................................      (5,789)          (3,518)
  Sale of minerals in place....................................................      (1,911)             (58)
  Purchase of minerals in place................................................      --               --
                                                                                 -----------          ------
Proved reserves as of December 31, 1997........................................      49,378           24,719
                                                                                 -----------          ------
                                                                                 -----------          ------
</TABLE>
 
    Proved reserves are estimated quantities of crude oil, natural gas and
natural gas liquids which geological and engineering data demonstrate with
reasonable certainty to be recoverable in future years from known reservoirs
under existing economic and operating conditions.
 
    There are numerous uncertainties inherent in estimating quantities of proved
oil and gas reserves. Oil and gas reserve engineering is a subjective process of
estimating underground accumulations of oil and gas that cannot be precisely
measured, and estimates of engineers other than the Company's might differ
materially from the estimates set forth herein. The accuracy of any reserve
estimate is a function of the quality of available data and of engineering and
geological interpretation and judgment. Results of drilling, testing and
production subsequent to the date of the estimate may justify revision of such
estimate. Accordingly, reserve estimates are often different from the quantities
of oil and gas that are ultimately recovered.
 
                                      F-14
<PAGE>
                   CONTINENTAL RESOURCES, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
8. SUPPLEMENTAL OIL AND GAS INFORMATION (UNAUDITED): (CONTINUED)
    Gas imbalance receivables and liabilities for each of the three years ended
December 31, 1995, 1996 and 1997, were not material and have not been included
in the reserve estimates.
 
    PROVED DEVELOPED OIL AND GAS RESERVES (UNAUDITED)
 
    The following reserve information was developed by the Company and set forth
the estimated quantities of proved developed oil and gas reserves of the Company
as of the beginning of each year.
 
<TABLE>
<CAPTION>
                                                                             CRUDE OIL AND
                                                             NATURAL GAS      CONDENSATE
                 PROVED DEVELOPED RESERVES                     (MMCF)     (BBLS IN THOUSANDS)
- -----------------------------------------------------------  -----------  -------------------
<S>                                                          <C>          <C>
                      January 1, 1995                            55,900            7,591
                      January 1, 1996                            52,588           12,627
                      January 1, 1997                            49,082           15,265
                      January 1, 1998                            47,676           19,411
</TABLE>
 
    Proved developed reserves are proved reserves which are expected to be
recovered through existing wells with existing equipment and operating methods.
 
    COSTS INCURRED IN OIL AND GAS ACTIVITIES
 
    Costs incurred in connection with the Company's oil and gas acquisition,
exploration and development activities during the year are shown below (in
thousands of dollars). Amounts are presented in accordance with SFAS No. 19, and
may not agree with amounts determined using traditional industry definitions.
 
<TABLE>
<CAPTION>
                                                                           1995       1996       1997
                                                                         ---------  ---------  ---------
<S>                                                                      <C>        <C>        <C>
Property acquisition costs:
  Proved...............................................................  $  16,293  $   3,327  $     476
  Unproved.............................................................     14,697      6,085      4,641
                                                                         ---------  ---------  ---------
    Total property acquisition costs...................................     30,990      9,412      5,117
Exploration costs......................................................     18,276     16,901      9,792
Development costs......................................................      4,240     20,600     49,268
                                                                         ---------  ---------  ---------
    Total..............................................................  $  53,506  $  46,913  $  64,177
                                                                         ---------  ---------  ---------
                                                                         ---------  ---------  ---------
</TABLE>
 
    AGGREGATE CAPITALIZED COSTS
 
    Aggregate capitalized costs relating to the Company's oil and gas producing
activities, and related accumulated DD&A, as of December 31 (in thousands of
dollars):
 
<TABLE>
<CAPTION>
                                                                                     1996        1997
                                                                                  ----------  ----------
<S>                                                                               <C>         <C>
Unproved oil and gas properties.................................................  $   16,878  $   17,047
Proved oil and gas properties...................................................     137,404     195,785
                                                                                  ----------  ----------
  Total.........................................................................     154,282     212,832
Less--Accumulated DD&A..........................................................      51,282      82,157
                                                                                  ----------  ----------
Net capitalized costs...........................................................  $  103,000  $  130,675
                                                                                  ----------  ----------
                                                                                  ----------  ----------
</TABLE>
 
                                      F-15
<PAGE>
                   CONTINENTAL RESOURCES, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
8. SUPPLEMENTAL OIL AND GAS INFORMATION (UNAUDITED): (CONTINUED)
    OIL AND GAS OPERATIONS (UNAUDITED)
 
    Aggregate results of operations for each period ended December 31, in
connection with the Company's oil and gas producing activities are shown below
(in thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                           1995       1996       1997
                                                                         ---------  ---------  ---------
<S>                                                                      <C>        <C>        <C>
Revenues...............................................................  $  30,576  $  75,016  $  78,599
Production costs.......................................................      7,611     19,338     20,748
Exploration expenses...................................................      6,184      4,512      6,806
DD&A and valuation provision*..........................................      8,999     21,635     30,202
                                                                         ---------  ---------  ---------
Income.................................................................      7,782     29,531     20,843
Income tax expense**...................................................      2,957     11,222      3,300
                                                                         ---------  ---------  ---------
Results of operations from producing activities (excluding corporate
  overhead and interest costs).........................................  $   4,825  $  18,309  $  17,543
                                                                         ---------  ---------  ---------
                                                                         ---------  ---------  ---------
</TABLE>
 
- --------------------------
 
*   Includes $2.1 million and $5 million in 1996 and 1997, respectively, of
    additional DD&A as a result of adoption of SFAS No. 121.
 
**  The 1997 income tax provision was computed based on estimated oil and gas
    operations income for the five months ended May 31, 1997, times the
    estimated effective income tax rate. The Company's S-Corporation status was
    effective June 1, 1997.
 
STANDARDIZED MEASURE OF DISCOUNTED FUTURE NET CASH FLOWS RELATING TO PROVED OIL
  AND GAS RESERVES (UNAUDITED)
 
    The following information is based on the Company's best estimate of the
required data for the Standardized Measure of Discounted Future Net Cash Flows
as of December 31, 1995, 1996, and 1997 as required by Financial Accounting
Standards Board's Statement of Financial Accounting Standards No. 69. The
Standard requires the use of a 10 percent discount rate. This information is not
the fair market value nor does it represent the expected present value of future
cash flows of the Company's proved oil and gas reserves (in thousands of
dollars).
 
<TABLE>
<CAPTION>
                                                                      1995         1996         1997
                                                                   -----------  -----------  -----------
<S>                                                                <C>          <C>          <C>
Future cash inflows..............................................  $   619,081  $   612,158  $   576,330
Future production and development costs..........................     (213,752)    (191,947)    (189,520)
Future income tax expenses.......................................     (145,620)    (141,487)     --
                                                                   -----------  -----------  -----------
Future net cash flows............................................      259,709      278,724      386,810
10% annual discount for estimated timing of cash flows...........     (105,182)    (101,591)    (145,185)
                                                                   -----------  -----------  -----------
Standardized measure of discounted future net cash flows.........  $   154,527  $   177,133  $   241,625
                                                                   -----------  -----------  -----------
                                                                   -----------  -----------  -----------
</TABLE>
 
    Future cash inflows are computed by applying year-end prices of oil and gas
relating to the Company's proved reserves to the year-end quantities of those
reserves. The year-end weighted average oil price utilized in the computation of
future cash inflows was approximately $18.06 per BBL at December 31, 1997 and
$23.00 per BBL at December 31, 1995 and 1996. The year-end weighted average gas
price utilized in the computation of future cash inflows was approximately $2.25
per MCF at December 31, 1997 and $3.28 per MCF at December 31, 1995 and 1996.
 
                                      F-16
<PAGE>
                   CONTINENTAL RESOURCES, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
8. SUPPLEMENTAL OIL AND GAS INFORMATION (UNAUDITED): (CONTINUED)
    Future production and development costs, which include dismantlement and
restoration expense, are computed by estimating the expenditures to be incurred
in developing and producing the Company's proved oil and gas reserves at the end
of the year, based on year-end costs, and assuming continuation of existing
economic conditions.
 
    Future income tax expenses are computed by applying the appropriate year-end
statutory tax rates to the future pretax net cash flows relating to the
Company's proved oil and gas reserves, less the tax bases of the properties
involved. The future income tax expenses give effect to tax credits and
allowances, but do not reflect the impact of general and administrative costs
and exploration expenses of ongoing operations relating to the Company's proved
oil and gas reserves. Income taxes were not computed at December 31, 1997, as
the Company elected S-Corporation status effective June 1, 1997.
 
    Principal changes in the aggregate standardized measure of discounted future
net cash flows attributable to the Company's proved oil and gas reserves at
year-end are shown below (in thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                        1995        1996        1997
                                                                     ----------  ----------  ----------
<S>                                                                  <C>         <C>         <C>
Standardized measure of discounted future net cash flows at the
  beginning of the year............................................  $  126,687  $  154,527  $  177,133
Extensions, discoveries and improved recovery, less related
  costs............................................................      23,489      28,815      16,352
Revisions of previous quantity estimates...........................      --          --          58,001
Changes in estimated future development costs......................      --          --         (36,901)
Purchases/sales of minerals in place...............................      27,615      --          (3,233)
Net changes in prices and production costs.........................      --          --         (51,456)
Accretion of discount..............................................      12,669      15,453      17,713
Sales of oil and gas produced, net of production costs.............     (22,965)    (55,678)    (57,851)
Development costs incurred during the period.......................      --          23,212      32,474
Net change in income taxes.........................................     (15,787)      3,200      89,915
Change in timing of estimated future production, and other.........       2,819       7,604        (522)
                                                                     ----------  ----------  ----------
Standardized measure of discounted future net cash flows at the end
  of the year......................................................  $  154,527  $  177,133  $  241,625
                                                                     ----------  ----------  ----------
                                                                     ----------  ----------  ----------
</TABLE>
 
    The standardized measure and changes in standardized measure prior to
December 31, 1996, were determined from production, drilling, acquisition and
sale records of the Company applied to the reserve reports as of December 31,
1996, without revision for oil and gas price assumptions.
 
   
9. SUBSEQUENT EVENTS (UNAUDITED):
    
 
   
    On May 18, 1998, the Company consummated the purchase of approximately
$86,500,000 of producing and non-producing oil and gas properties and certain
other related assets in the Worland Field (the "Worland Field Properties")
effective as of June 1, 1998, which the Company funded through borrowings on its
line of credit. Subsequently, and effective June 1, 1998, the Company sold an
undivided 50% interest in the Worland Field Properties (excluding inventory and
certain equipment) to the Company's principal stockholder for approximately
$42.6 million. Of the total sale price to the stockholder, approximately $23.0
million plus interest of approximately $0.3 million was offset against the
outstanding balance of notes
    
 
                                      F-17
<PAGE>
                   CONTINENTAL RESOURCES, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
   
9. SUBSEQUENT EVENTS (UNAUDITED): (CONTINUED)
    
   
payable to the stockholder and approximately $19.6 million was recorded as an
increase in advances to affiliates in the accompanying June 30, 1998
consolidated condensed balance sheet.
    
 
   
    In May 1998, the Company entered into a forward interest rate swap contract
to hedge its exposure to changes in prevailing interest rates on the anticipated
debt offering described in the following paragraph. Due to changes in treasury
note rates, the Company paid $3.9 million to settle the forward interest rate
swap contract. This payment will result in an increase of approximately 0.5% to
the Company's effective interest rate or an increase in interest expense of
approximately $0.4 million per year over the next 10 years.
    
 
   
    On July 24, 1998, the Company issued $150 million of 10 1/4% Senior
Subordinated Notes due August 1, 2008 (the "Notes") in a private transaction
under Securities Act Rule 144A. In connection with the issuance of the Notes,
the Company incurred debt issuance costs of approximately $4.6 million, which
has been capitalized as other assets and is being amortized on a straight-line
basis over the life of the Notes.
    
 
   
    On July 24, 1998, the outstanding balance under the line of credit of
approximately $162.8 million was repaid using approximately $19.6 million in
proceeds received from the principal stockholder relating to the sale of a 50%
undivided interest in the Worland Properties and approximately $143.2 million in
proceeds from the Notes. Upon issuance of the Notes and payment of the
outstanding balance under the line of credit, the line of credit was amended to
allow borrowings up to $75.0 million.
    
 
                                      F-18
<PAGE>
                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
To Continental Resources, Inc.:
 
We have audited the accompanying statements of revenues and direct operating
expenses of the oil and gas properties included in the Purchase Agreement
between Continental Resources Inc. and Bass Enterprises Production Co. (the
"Properties") for the three years in the period ended December 31, 1997. These
statements are the responsibility of Continental Resources management. Our
responsibility is to express an opinion on these statements based on our audits.
 
We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the statements of revenues and direct
operating expenses are free of material misstatement. An audit includes
examining, on a test basis, evidence supporting the amounts and disclosures in
the statements of revenues and direct operating expenses. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall statement presentation. We believe
that our audits provide a reasonable basis for our opinion.
 
The accompanying statements of revenues and direct operating expenses were
prepared in connection with the purchase of the Properties and, as described in
Note 1, exclude general and administrative expenses, depreciation, depletion and
amortization, interest, income tax expenses, and other items as these expenses
would not be comparable to those resulting from the proposed future operations
of the Properties.
 
In our opinion, the statements of revenues and direct operating expenses
referred to above present fairly, in all material respects, the revenues and
direct operating expenses of the Properties for the three years in the period
ended December 31, 1997.
 
                                                   ARTHUR ANDERSEN LLP
 
Oklahoma City, Oklahoma,
June 4, 1998
 
                                      F-19
<PAGE>
              STATEMENTS OF REVENUES AND DIRECT OPERATING EXPENSES
      OF OIL AND GAS PROPERTIES INCLUDED IN THE PURCHASE AGREEMENT BETWEEN
        CONTINENTAL RESOURCES, INC. AND BASS ENTERPRISES PRODUCTION CO.
 
   
<TABLE>
<CAPTION>
                                                                                       FOR THE SIX
                                                FOR THE YEARS ENDED DECEMBER 31,       MONTHS ENDED  FOR THE FIVE
                                           ------------------------------------------    JUNE 30,    MONTHS ENDED
                                               1995          1996           1997           1997      MAY 31, 1998
                                           ------------  -------------  -------------  ------------  ------------
                                                                                              (UNAUDITED)
<S>                                        <C>           <C>            <C>            <C>           <C>
 
REVENUES:
 
  Oil sales..............................  $  9,002,941  $  13,463,786  $   9,993,174  $  5,605,242  $  1,883,222
 
  Gas sales..............................       189,592        110,020        132,750        63,297       243,345
                                           ------------  -------------  -------------  ------------  ------------
 
    Total revenues.......................     9,192,533     13,573,806     10,125,924     5,668,539     2,126,567
 
DIRECT OPERATING EXPENSES:
 
  Production and operating expenses......     3,634,950      4,845,364      5,209,488     3,109,314     1,268,409
                                           ------------  -------------  -------------  ------------  ------------
 
REVENUES IN EXCESS OF DIRECT OPERATING
  EXPENSES...............................  $  5,557,583  $   8,728,442  $   4,916,436  $  2,559,225  $    858,150
                                           ------------  -------------  -------------  ------------  ------------
                                           ------------  -------------  -------------  ------------  ------------
</TABLE>
    
 
   The accompanying notes are an integral part of these financial statements.
 
                                      F-20
<PAGE>
         NOTES TO STATEMENTS OF REVENUES AND DIRECT OPERATING EXPENSES
      OF OIL AND GAS PROPERTIES INCLUDED IN THE PURCHASE AGREEMENT BETWEEN
        CONTINENTAL RESOURCES, INC. AND BASS ENTERPRISES PRODUCTION CO.
 
1. BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES:
 
    BASIS OF PRESENTATION
 
    The accompanying statements present revenues and direct operating expenses
of working and royalty interests in oil and gas properties located near the town
of Worland in the Bighorn Basin of Wyoming included in the Purchase Agreement
between Continental Resources, Inc. ("Continental") and Bass Enterprises
Production Co., adjusted for Continental's sale of a 50% interest in the oil and
gas properties to Continental's majority shareholder (the "Properties").
 
    The accompanying statements of revenues and direct operating expenses were
prepared on the accrual basis of accounting and relate only to the Properties
described above. These historical results may not be indicative of future
operations. The statements do not include general and administrative expenses,
interest, depreciation, depletion and amortization, Federal and state income
taxes and other items because such amounts would not be indicative of those
expenses which will be incurred by Continental.
 
   
    The unaudited statements of revenues and direct operating expenses for the
six month period ended June 30, 1997 and the five month period ended May 31,
1998, in the opinion of Continental management, were prepared on a basis
consistent with the audited statements of revenues and direct operating expenses
of the Properties for the three years in the period ended December 31, 1997, and
include all adjustments, consisting only of normal recurring accruals, necessary
to present fairly the revenues and direct operating expenses for the indicated
periods. The statement of revenues and direct operating expenses for the five
month period ended May 31, 1998 represents the revenues and direct operating
expenses of the Properties up to the time of their acquisition by Continental on
June 1, 1998.
    
 
    USE OF ESTIMATES
 
    The preparation of the statements of revenues and direct operating expenses
in conformity with generally accepted accounting principles requires Continental
to make estimates and assumptions that affect the reported amounts of revenues
and direct operating expenses during the reporting periods. Actual results could
differ from those estimates as additional information becomes available.
 
    CONCENTRATION OF REVENUE AND LIMITED NUMBER OF CUSTOMERS
 
    Approximately 84%, 78% and 75% of revenues were derived from one property
during 1995, 1996 and 1997, respectively. In addition, virtually all of the
production of the properties was purchased by three purchasers during the
periods.
 
2. SUPPLEMENTAL OIL AND GAS INFORMATION (UNAUDITED):
 
    PROVED OIL AND GAS RESERVES (UNAUDITED)
 
    The following reserve information was developed from reserve reports as of
January 1, 1998, prepared by independent reserve engineers and set forth the
changes in estimated quantities of proved oil and gas reserves of the Properties
during each of the three years presented. Information prior to January 1, 1998,
 
                                      F-21
<PAGE>
         NOTES TO STATEMENTS OF REVENUES AND DIRECT OPERATING EXPENSES
      OF OIL AND GAS PROPERTIES INCLUDED IN THE PURCHASE AGREEMENT BETWEEN
  CONTINENTAL RESOURCES, INC. AND BASS ENTERPRISES PRODUCTION CO. (CONTINUED)
 
2. SUPPLEMENTAL OIL AND GAS INFORMATION (UNAUDITED): (CONTINUED)
was determined from production and drilling as applied to the January 1, 1998,
reserve reports as reports prior to January 1, 1998, were not available.
 
<TABLE>
<CAPTION>
                                                                                       CRUDE OIL AND
                                                                       NATURAL GAS      CONDENSATE
                                                                         (MMCF)     (BBLS IN THOUSANDS)
                                                                       -----------  -------------------
<S>                                                                    <C>          <C>
 
Proved reserves as of December 31, 1994..............................      29,791           26,783
 
  Extensions, discoveries and other additions........................      --                  592
 
  Production.........................................................        (367)            (565)
                                                                       -----------          ------
 
Proved reserves as of December 31, 1995..............................      29,424           26,810
 
  Extensions, discoveries and other additions........................         177            1,119
 
  Production.........................................................        (521)            (675)
                                                                       -----------          ------
 
Proved reserves as of December 31, 1996..............................      29,080           27,254
 
  Extensions, discoveries and other additions........................      --                  622
 
  Production.........................................................        (610)            (628)
                                                                       -----------          ------
 
Proved reserves as of December 31, 1997..............................      28,470           27,248
                                                                       -----------          ------
                                                                       -----------          ------
</TABLE>
 
    Proved reserves are estimated quantities of crude oil, natural gas and
natural gas liquids which geological and engineering data demonstrate with
reasonable certainty to be recoverable in future years from known reservoirs
under existing economic and operating conditions.
 
    There are numerous uncertainties inherent in estimating quantities of proved
oil and gas reserves. Oil and gas reserve engineering is a subjective process of
estimating underground accumulations of oil and gas that cannot be precisely
measured, and estimates of other engineers might differ materially from the
estimates set forth herein. The accuracy of any reserve estimate is a function
of the quality of available data and of engineering and geological
interpretation and judgment. Results of drilling, testing and production
subsequent to the date of the estimate may justify revision of such estimate.
Accordingly, reserve estimates are often different from the quantities of oil
and gas that are ultimately recovered.
 
    PROVED DEVELOPED OIL AND GAS RESERVES (UNAUDITED)
 
    The following reserve information was developed by Continental and set forth
the estimated quantities of proved developed oil and gas reserves of the
Properties as of the beginning of each year.
 
<TABLE>
<CAPTION>
                                                                                       CRUDE OIL AND
                                                                       NATURAL GAS  CONDENSATE (BBLS IN
PROVED DEVELOPED RESERVES                                                (MMCF)         THOUSANDS)
- ---------------------------------------------------------------------  -----------  -------------------
<S>                                                                    <C>          <C>
 
January 1, 1995......................................................      13,889           10,879
 
January 1, 1996......................................................      13,699           10,906
 
January 1, 1997......................................................      13,355           11,350
 
January 1, 1998......................................................      12,565           11,344
</TABLE>
 
                                      F-22
<PAGE>
         NOTES TO STATEMENTS OF REVENUES AND DIRECT OPERATING EXPENSES
      OF OIL AND GAS PROPERTIES INCLUDED IN THE PURCHASE AGREEMENT BETWEEN
  CONTINENTAL RESOURCES, INC. AND BASS ENTERPRISES PRODUCTION CO. (CONTINUED)
 
2. SUPPLEMENTAL OIL AND GAS INFORMATION (UNAUDITED): (CONTINUED)
    Proved developed reserves are proved reserves which are expected to be
recovered through existing wells with existing equipment and operating methods.
 
    STANDARDIZED MEASURE OF DISCOUNTED FUTURE NET CASH FLOWS RELATING TO PROVED
     OIL AND GAS RESERVES (UNAUDITED)
 
    The following information is based on Continental's best estimate of the
required data for the Standardized Measure of Discounted Future Net Cash Flows
as of December 31, 1995, 1996, and 1997 as required by Financial Accounting
Standards Board's Statement of Financial Accounting Standards No. 69. The
Standard requires the use of a 10 percent discount rate. This information is not
the fair market value nor does it represent the expected present value of future
cash flows of Continental's proved oil and gas reserves (in thousands of
dollars).
 
<TABLE>
<CAPTION>
                                                                        1995        1996        1997
                                                                     ----------  ----------  ----------
<S>                                                                  <C>         <C>         <C>
 
Future cash inflows................................................  $  361,538  $  348,847  $  339,212
 
Future production and development costs............................     204,874     192,407     180,945
                                                                     ----------  ----------  ----------
 
Future net cash flows..............................................     156,664     156,440     158,267
 
10% annual discount for estimated timing of cash flows.............     137,116     135,184     132,876
                                                                     ----------  ----------  ----------
 
Standardized measure of discounted future net cash flows...........  $   19,548  $   21,256  $   25,391
                                                                     ----------  ----------  ----------
                                                                     ----------  ----------  ----------
</TABLE>
 
    Future cash inflows are computed by applying year-end prices of oil and gas
relating to the Properties' proved reserves to the year-end quantities of those
reserves. The year-end weighted average oil price utilized in the computation of
future cash inflows was approximately $11.44 per BBL at December 31, 1995, 1996
and 1997. The year-end weighted average gas price utilized in the computation of
future cash inflows was approximately $1.00 per MCF at December 31, 1995, 1996
and 1997.
 
    Future production and development costs, which include dismantlement and
restoration expense, are computed by estimating the expenditures to be incurred
in developing and producing the Properties' proved oil and gas reserves at the
end of the year, based on year-end 1997 costs, and assuming continuation of
existing economic conditions.
 
                                      F-23
<PAGE>
         NOTES TO STATEMENTS OF REVENUES AND DIRECT OPERATING EXPENSES
      OF OIL AND GAS PROPERTIES INCLUDED IN THE PURCHASE AGREEMENT BETWEEN
  CONTINENTAL RESOURCES, INC. AND BASS ENTERPRISES PRODUCTION CO. (CONTINUED)
 
2. SUPPLEMENTAL OIL AND GAS INFORMATION (UNAUDITED): (CONTINUED)
    Principal changes in the aggregate standardized measure of discounted future
net cash flows attributable to the Properties' proved oil and gas reserves at
year-end are shown below (in thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                        1995        1996        1997
                                                                     ----------  ----------  ----------
<S>                                                                  <C>         <C>         <C>
 
Standardized measure of discounted future net cash flows at the
  beginning of the year............................................  $   16,715  $   19,548  $   21,256
 
Extensions, discoveries and improved recovery, less related
  costs............................................................         468         884         491
 
Accretion of discount..............................................       1,778       1,932       2,308
 
Sales of oil and gas produced, net of production costs.............      (5,558)     (8,729)     (4,917)
 
Development costs incurred during the period.......................       6,145       7,621       6,253
                                                                     ----------  ----------  ----------
 
Standardized measure of discounted future net cash flows at the end
  of the year......................................................  $   19,548  $   21,256  $   25,391
                                                                     ----------  ----------  ----------
                                                                     ----------  ----------  ----------
</TABLE>
 
    The standardized measure and changes in standardized measure prior to
December 31, 1997, were determined from production and drilling records of the
Properties applied to the reserve reports as of January 1, 1998, without
revision for oil and gas price assumptions.
 
                                      F-24
<PAGE>
                                    PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 20. INDEMNIFICATION OF DIRECTORS AND OFFICERS
 
    As permitted by the Oklahoma General Corporation Act under which the Company
is incorporated, the Company's Certificate of Incorporation, as amended,
provides for indemnification of each of the Company's officers and directors
against (a) expenses, including attorney's fees, judgments, fines and amounts
paid in settlement actually and reasonably incurred by him in connection with
any action, suit or proceeding brought by reason of his being or having been a
director, officer, employee or agent of the Company, or of any other
corporation, partnership, joint venture, or other enterprise at the request of
the Company, other than an action by or in the right of the Company, provided
that he acted in good faith and in a manner he reasonably believed to be in the
best interest of the Company, and with respect to any criminal action, he had no
reasonable cause to believe that his conduct was unlawful and (b) expenses
(including attorney's fees) actually and reasonably incurred by him in
connection with the defense or settlement of any action or suit by or in the
right of the Company brought by reason of his being or having been a director,
officer, employee or agent of the Company, or any other corporation,
partnership, joint venture, or other enterprise at the request of the Company,
provided that he acted in good faith and in a manner he reasonably believed to
be in or not opposed to the best interest of the Company; except that no
indemnification shall be made in respect of any claim, issue or matter as to
which such person shall have been adjudged liable to the Company, unless and
only to the extent that the court in which such action or suit was decided has
determined that the person is fairly and reasonably entitled to indemnification
for such expenses which the court shall deem proper. The Company's bylaws
provide for similar indemnification. These provisions may be sufficiently broad
to indemnify such persons for liabilities arising under the Securities Act of
1933, as amended.
 
    The Company's directors and officers are also insured against claims arising
out of the performance of their duties in such capacities.
 
ITEM 21. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES.
 
    (a) Exhibits
 
   
<TABLE>
<CAPTION>
  EXHIBIT
  NUMBERS                                             DESCRIPTION
- -----------  ----------------------------------------------------------------------------------------------
<S>          <C>
       3.1   Registrant's Certificate of Incorporation, as amended and restated
       3.2   Registrant's Bylaws, as amended and restated
      3.3*   Certificate of Incorporation of Continental Gas, Inc.
      3.4*   Bylaws of Continental Gas, Inc., as amended and restated
      3.5*   Certificate of Incorporation of Continental Crude Co.
      3.6*   Bylaws of Continental Crude Co.
       4.1   Restated Credit Agreement dated May 12, 1998 among Continental Resources, Inc. and Continental
               Gas, Inc., as Borrowers and Bank One, Oklahoma, N.A. and the Institutions named therein as
               Banks and Bank One, Oklahoma, N.A., as Agent (the "Credit Agreement")
       4.2   Form of Revolving Note under the Credit Agreement
      4.3*   Indenture dated as of July 24, 1998 between the Registrant, as Issuer, the Subsidiary
               Guarantors named therein and United States Trust Company of New York, as Trustee
       4.4   Exchange and Registration Rights Agreement dated July 24, 1998 between the Registrant, the
               Subsidiary Guarantors named therein and Chase Securities, Inc.
         5   Opinion of McAfee & Taft A Professional Corporation
</TABLE>
    
 
                                      II-1
<PAGE>
   
<TABLE>
<CAPTION>
  EXHIBIT
  NUMBERS                                             DESCRIPTION
- -----------  ----------------------------------------------------------------------------------------------
<S>          <C>
     10.1*   Purchase and Sale Agreement dated March 28, 1998 by and between Bass Enterprises Production
               Co., et al. as Sellers and Continental Resources, Inc. as Buyer
     10.2*   Worland Area Purchase and Sale Agreement, as amended, dated June 25, 1998 by and between
               Continental Resources, Inc. as Seller and Harold G. Hamm, Trustee of the Harold G. Hamm
               Revocable Intervivos Trust dated April 23, 1984 as Buyer
     12.1*   Statement re computation of ratio of debt to EBITDA
     12.2*   Statement re computation of ratio of earnings to fixed charges
     12.3*   Statement re computation of ratio of EBITDA to interest expense
        21   Subsidiaries
      23.1   Consent of McAfee & Taft A Professional Corporation is contained in Exhibit 5 hereto
     23.2*   Consent of Arthur Andersen LLP
     23.3*   Consent of Ryder Scott Company Petroleum Engineers
       24*   Power of Attorney
        25   Statement of eligibility of Trustee
       27*   Financial Data Schedule
     99.1*   Letter of Transmittal
      99.2   Notice of Guarantee of Delivery
      99.3   Company letter
      99.4   Client letter
      99.5   Guidelines for certification of taxpayer identification number
</TABLE>
    
 
- ------------------------
 
   
* Filed herewith.
    
 
    (b) Financial Statement Schedules
 
    None
 
ITEM 22. UNDERTAKINGS.
 
    The undersigned Registrant hereby undertakes:
 
        (1) To file, during any period in which offers or sales are being made,
    a post-effective amendment to this Registration Statement:
 
            (i) To include any prospectus required by section 10(a)(3) of the
       Securities Act of 1933;
 
            (ii) To reflect in the prospectus any facts or events arising after
       the effective date of the Registration Statement (or the most recent
       post-effective amendment thereof) which, individually or in the
       aggregate, represent a fundamental change in the information set forth in
       the Registration Statement;
 
           (iii) To include any material information with respect to the plan of
       distribution not previously disclosed in the Registration Statement or
       any material change to such information in the Registration Statement.
 
        (2) That, for the purpose of determining any liability under the
    Securities Act of 1933, each such post-effective amendment shall be deemed
    to be a new registration statement relating to the securities offered
    therein, and the offering of such securities at the time shall be deemed to
    be the initial bona fide offering thereof.
 
                                      II-2
<PAGE>
        (3) To remove from registration by means of a post-effective amendment
    any of the securities being registered which remain unsold at the
    termination of the offering.
 
    The undersigned Registrant hereby undertakes to respond to requests for
information that is incorporated by reference into the prospectus pursuant to
Items 4, 10(b), 11 or 13 of this Form, within one business day of receipt of
such request, and to send the incorporated documents by first class mail or
other equally prompt means. This includes information contained in documents
filed subsequent to the effective date of the Registration Statement through the
date of responding to the request.
 
    The undersigned Registrant hereby undertakes to supply by means of a
post-effective amendment all information concerning a transaction, and the
company being acquired involved therein, that was not the subject of and
included in the Registration Statement when it became effective.
 
    Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted to directors, officers and controlling persons of the
Registration pursuant to the provisions described under Item 20, or otherwise,
the Registrant has been advised that in the opinion of the Securities and
Exchange Commission such indemnifications against public policy as expressed in
the Act and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by the
Registrant of expenses incurred or paid by a director, officer or controlling
person of the Registrant in the successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the Registrant will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit a court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as expressed in the Act and will
be governed by the final adjudication of such issue.
 
                                      II-3
<PAGE>
                                   SIGNATURES
 
   
    Pursuant to the requirements of the Securities Act of 1933, the registrant
has duly caused this Amendment to the Registration Statement to be signed on its
behalf by the undersigned, thereunto duly authorized, in the City of Oklahoma
City, State of Oklahoma, on October 19, 1998.
    
 
<TABLE>
<S>                             <C>  <C>
                                CONTINENTAL RESOURCES, INC.
 
                                By:               /s/ HAROLD HAMM
                                     -----------------------------------------
                                                    Harold Hamm
                                     CHAIRMAN OF THE BOARD, PRESIDENT AND CHIEF
                                                 EXECUTIVE OFFICER
</TABLE>
 
   
    Pursuant to the requirements of the Securities Act of 1933, this Amendment
to the Registration Statement has been signed by the following persons in the
capacities indicated on October 19, 1998.
    
 
<TABLE>
<CAPTION>
             NAME                         TITLE
- ------------------------------  --------------------------
 
<C>                             <S>                         <C>
                                Chairman of the Board,
       /s/ HAROLD HAMM            President and Chief
- ------------------------------    Executive Officer
         Harold Hamm              (Principal Executive
                                  Officer) and Director
 
      /s/ JACK H. STARK
- ------------------------------  Senior Vice President and
        Jack H. Stark             Director
 
                                Senior Vice President,
                                  Treasurer and Chief
     /s/ ROGER V. CLEMENT         Financial Officer
- ------------------------------    (Principal Financial and
       Roger V. Clement           Accounting Officer) and
                                  Director
 
        /s/ JEFF HUME
- ------------------------------  Senior Vice President,
          Jeff Hume               Director
 
       /s/ RANDY MOEDER         Senior Vice President,
- ------------------------------    General Counsel,
         Randy Moeder             Secretary and Director
</TABLE>
 
                                      II-4
<PAGE>
                                   SIGNATURES
 
   
    Pursuant to the requirements of the Securities Act of 1933, the following
additional Registrant has duly caused this Amendment to the Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Oklahoma City, State of Oklahoma, on October 19,
1998.
    
 
<TABLE>
<S>                             <C>  <C>
                                CONTINENTAL GAS, INC.
 
                                By:               /s/ HAROLD HAMM
                                     -----------------------------------------
                                                    Harold Hamm
                                     CHAIRMAN OF THE BOARD AND CHIEF EXECUTIVE
                                                      OFFICER
</TABLE>
 
   
    Pursuant to the requirements of the Securities Act of 1933, this Amendment
to the Registration Statement has been signed by the following persons in the
capacities indicated on October 19, 1998.
    
 
          SIGNATURE                              TITLE
- ------------------------------  ----------------------------------------
 
       /s/ HAROLD HAMM          Chairman of the Board, Chief Executive
- ------------------------------    Officer (Principal Executive Officer)
         Harold Hamm              and Director of Continental Gas, Inc.
 
       /s/ RANDY MOEDER
- ------------------------------  President and Director of Continental
         Randy Moeder             Gas, Inc.
 
                                Assistant Secretary and Chief Financial
     /s/ ROGER V. CLEMENT         Officer (Principal Financial Officer
- ------------------------------    and Principal Accounting Officer) of
       Roger V. Clement           Continental Gas, Inc.
 
                                      II-5
<PAGE>
                                   SIGNATURES
 
   
    Pursuant to the requirements of the Securities Act of 1933, the following
additional Registrant has duly caused this Amendment to the Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Oklahoma City, State of Oklahoma, on October 19,
1998.
    
 
   
<TABLE>
<S>                             <C>  <C>
                                CONTINENTAL CRUDE CO.
 
                                By:                /s/ JEFF WHITE
                                     -----------------------------------------
                                                     Jeff White
                                       PRESIDENT AND CHIEF EXECUTIVE OFFICER
</TABLE>
    
 
   
    Pursuant to the requirements of the Securities Act of 1933, this Amendment
to the Registration Statement has been signed by the following persons in the
capacities indicated on October 19, 1998.
    
 
          SIGNATURE                              TITLE
- ------------------------------  ----------------------------------------
 
        /s/ JEFF WHITE          President, Chief Executive Officer
- ------------------------------    (Principal Executive Officer) and
          Jeff White              Director of Continental Crude Co.
 
                                Treasurer and Chief Financial Officer
     /s/ ROGER V. CLEMENT         (Principal Financial Officer and
- ------------------------------    Principal Accounting Officer) and
       Roger V. Clement           Director of Continental Crude Co.
 
       /s/ RANDY MOEDER
- ------------------------------  Secretary
         Randy Moeder
 
                                      II-6
<PAGE>
   
    AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON OCTOBER 20, 1998
    
                                                      REGISTRATION NO. 333-61547
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
 
                            ------------------------
 
                                    EXHIBITS
 
                                       TO
 
                                    FORM S-4
 
                             REGISTRATION STATEMENT
 
                                     UNDER
 
                           THE SECURITIES ACT OF 1933
 
                            ------------------------
 
                          CONTINENTAL RESOURCES, INC.
 
             (Exact name of registrant as specified in its charter)
 
<TABLE>
<S>                              <C>                            <C>
           OKLAHOMA                          1311                  73-0767549
 (State or other jurisdiction    (Primary Standard Industrial   (I.R.S. Employer
              of                 Classification Code Number)     Identification
incorporation or organization)                                        No.)
</TABLE>
 
                            ------------------------
 
        302 NORTH INDEPENDENCE                        ROGER CLEMENT
              SUITE 300                           302 NORTH INDEPENDENCE
         ENID, OKLAHOMA 73701                           SUITE 300
            (580) 233-8955                         ENID, OKLAHOMA 73701
  (Address, including Zip Code, and                   (580) 233-8955
              telephone                       (Name, address, including Zip
   number, including area code, of             Code, and telephone number,
        registrant's principal                   including area code, of
          executive offices)                        agent for service)
 
                            ------------------------
 
                                   COPIES TO:
 
                             THEODORE M. ELAM, ESQ.
                              BRICE TARZWELL, ESQ.
                    MCAFEE & TAFT A PROFESSIONAL CORPORATION
                       TENTH FLOOR, TWO LEADERSHIP SQUARE
                         OKLAHOMA CITY, OKLAHOMA 73102
                                 (405) 235-9621
 
- --------------------------------------------------------------------------------
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<PAGE>
                               INDEX TO EXHIBITS
 
   
<TABLE>
<CAPTION>
  EXHIBIT
  NUMBERS                                             DESCRIPTION
- -----------  ----------------------------------------------------------------------------------------------
<S>          <C>
       3.1   Registrant's Certificate of Incorporation, as amended and restated
       3.2   Registrant's Bylaws, as amended and restated
      3.3*   Certificate of Incorporation of Continental Gas, Inc.
      3.4*   Bylaws of Continental Gas, Inc., as amended and restated
      3.5*   Certificate of Incorporation of Continental Crude Co.
      3.6*   Bylaws of Continental Crude Co.
       4.1   Restated Credit Agreement dated May 12, 1998 among Continental Resources, Inc. and Continental
               Gas, Inc., as Borrowers and Bank One, Oklahoma, N.A. and the Institutions named therein as
               Banks and Bank One, Oklahoma, N.A., as Agent (the "Credit Agreement")
       4.2   Form of Revolving Note under the Credit Agreement
      4.3*   Indenture dated as of July 24, 1998 between the Registrant, as Issuer, the Subsidiary
               Guarantors named therein and United States Trust Company of New York, as Trustee
       4.4   Exchange and Registration Rights Agreement dated July 24, 1998 between the Registrant, the
               Subsidiary Guarantors named therein and Chase Securities, Inc.
         5   Opinion of McAfee & Taft A Professional Corporation
     10.1*   Purchase and Sale Agreement dated March 28, 1998 by and between Bass Enterprises Production
               Co., et al. as Sellers and Continental Resources, Inc. as Buyer
     10.2*   Worland Area Purchase and Sale Agreement, as amended, dated June 25, 1998 by and between
               Continental Resources, Inc. as Seller and Harold G. Hamm, Trustee of the Harold G. Hamm
               Revocable Intervivos Trust dated April 23, 1984 as Buyer
     12.1*   Statement re computation of ratio of debt to EBITDA
     12.2*   Statement re computation of ratio of earnings to fixed charges
     12.3*   Statement re computation of ratio of EBITDA to interest expense
        21   Subsidiaries
      23.1   Consent of McAfee & Taft A Professional Corporation is contained in Exhibit 5 hereto
     23.2*   Consent of Arthur Andersen LLP
     23.3*   Consent of Ryder Scott Company Petroleum Engineers
       24*   Power of Attorney
        25   Statement of eligibility of Trustee
       27*   Financial Data Schedule
     99.1*   Letter of Transmittal
      99.2   Notice of Guarantee of Delivery
      99.3   Company letter
      99.4   Client letter
      99.5   Guidelines for certification of taxpayer identification number
</TABLE>
    
 
- ------------------------
 
   
* Filed herewith.
    

<PAGE>

                        OFFICE OF THE SECRETARY OF STATE
                               STATE OF OKLAHOMA

                                       
                 [GREAT SEAL OF THE STATE OF OKLAHOMA -- 1907]



                          CERTIFICATE OF INCORPORATION

To all to Whom these Presents shall come Greetings:

WHEREAS, the Certificate of Incorporation duly signed and required of


                             CONTINENTAL GAS, INC.
                                       

has been filed in the office of the Secretary of State as provided by the 
Laws of the State of Oklahoma.

NOW THEREFORE, I, the undersigned, Secretary of State of the State of 
Oklahoma by virtue of the powers vested in me by law do hereby issue this 
Certificate of Incorporation.

IN TESTIMONY WHEREOF, I hereunto set my hand and cause to be affixed the 
Great Seal of the State of Oklahoma.

Filed at the City of Oklahoma City this 4th day of April, 1990.

[Great Seal of the State
of Oklahoma -- 1907]

                                   /s/ HANNAH D. ATKINS
                                   ---------------------------
                                   Secretary of State

                              By:  /s/ BETH R. GARNER
                                   ---------------------------

<PAGE>

FEE:  $1.00 PER $1,000.00                                                 FILED
ON AUTHORIZED CAPITAL                                             APRIL 2, 1990
MINIMUM FEE:  $50.00                                OKLAHOMA SECRETARY OF STATE

                                                            FOR OFFICE USE ONLY


                          CERTIFICATE OF INCORPORATION
                                    (PROFIT)


FILE IN DUPLICATE

PRINT CLEARLY

TO THE SECRETARY OF STATE OF THE STATE OF OKLAHOMA


1.  The name of this corporation is

Continental Gas, Inc.
- -------------------------------------------------------------------------------
(Please refer to procedure sheet for statutory words required to be included in
the corporate name.)

2.  The address of the registered office in the State of Oklahoma and the name
of the registered agent at such address are

  Harold Hamm        621 S. Harding             Enid     Garfield     73703
- -------------------------------------------------------------------------------
     NAME       NUMBER & STREET ADDRESS         CITY      COUNTY    ZIP CODE
           (P.O. BOXES ARE NOT ACCEPTABLE.)
                          ---

3.  The duration of the corporation is                  Perpetual
                                          -------------------------------------
                                           (Perpetual unless otherwise stated)

4.  The purpose or purposes for which the corporation is formed are:

    To engage in any lawful act or activity for which corporations may be
    organized under the general corporation law of Oklahoma.

                                                                       RECEIVED
                                                                 April 24, 1990
                                                    Oklahoma Secretary of State


5.  The aggregate number of shares which the corporation shall have authority
to issue, the designation of each class, the number of shares of each class, and
the par value of the shares of each class are as follows:

<TABLE>
<CAPTION>
NUMBER OF SHARES             SERIES         PAR VALUE PER SHARE
                                            (Or, if without par value, so state)
<S>                          <C>            <C>
Common   100                 (Common)             Zero (0)
        -----                                    ----------

Preferred   Zero (0)                                 N/A
           ---------                             ----------

TOTAL NO. SHARES   100            TOTAL AUTHORIZED CAPITAL   ZERO (0)
                  -----                                     ----------
</TABLE>

<PAGE>

6.  If the powers of the incorporator(s) are to terminate upon the filing of
the certificate of incorporation, the names and mailing addresses of the persons
who are to serve as directors:

     NAME             MAILING ADDRESS         CITY      STATE         ZIP CODE
     ----             ---------------         ----      -----         --------

- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------

7.  The name and mailing address of the undersigned incorporator(s):

     NAME             MAILING ADDRESS         CITY      STATE         ZIP CODE
     ----             ---------------         ----      -----         --------

  HAROLD HAMM          P.O. BOX 10549         ENID,       OK            73706
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------

     THE UNDERSIGNED, for the purpose of forming a corporation under the laws 
of the State of Oklahoma does certify that the facts herein stated are true, 
and has accordingly hereunto set my hand this  23RD  day of  APRIL  , 19 90 .


                                          /s/ HAROLD HAMM
                                          ------------------------------
                                                    Signature



                                          ------------------------------
                                                    Signature



                                      -2-
<PAGE>

FEE:  $10.00

                                                                          FILED
                             CHANGE OR DESIGNATION
                                       OF                           MAY 6, 1993
                                REGISTERED AGENT
                                     AND/OR            Okla. Secretary of State
                                  LOCATION OF
                               REGISTERED OFFICE            FOR OFFICE USE ONLY
FILE IN DUPLICATE
PLEASE PRINT CLEARLY

PLEASE NOTE:  this form MUST be filed with a letter from the Oklahoma Tax 
Commission stating the franchise tax has been paid by the corporation for the 
current fiscal year, with the EXCEPTION of not for profit corporations.

TO:  THE OKLAHOMA SECRETARY OF STATE, 101 State Capitol, Oklahoma City, OK 
73105

     The undersigned, for the purpose of changing its registered agent and/or 
registered office pursuant to Section 1023/1026 of the Oklahoma General 
Corporation Act, hereby certifies:

8.  The name of the corporation Is:   Continental Gas, Inc.
                                    -------------------------------------------
                                                                       RECEIVED
- -------------------------------------------------------------------------------
                                                                    MAY 6, 1993

9.  The location of the registered office of this corporation is:
                                                       OKLA. SECRETARY OF STATE

 302 North Independence - 3rd Floor         Enid       Garfield        73701
- -------------------------------------------------------------------------------
 Street Address                             City        County        Zip Code
 (P.O. Boxes are NOT acceptable.)

10.  The name of the registered agent at such address upon whom process against
     this corporation may be served is:


  Harold Hamm
- -------------------------------------------------------------------------------
     IN WITNESS WHEREOF, said corporation has caused this certificate to be
signed by its __________ President and attested by its _______ Secretary, this  
28TH day of APRIL, 1993.


/s/ HAROLD HAMM                              Harold Hamm
- ------------------------------------------  -----------------------------------
by                 _____President           (Please Print name)

ATTEST:


/s/ CHRISTINE ROBERTS                       Christine Roberts
- ------------------------------------------  -----------------------------------
by                 _____Secretary           (Please Print name)


<PAGE>
                                 AMENDED AND RESTATED
                                        BYLAWS
                                          OF
                                CONTINENTAL GAS, INC.
                                     MAY 13, 1998


                                 ARTICLE I.  OFFICES

          The principal office of the Corporation in the State of Oklahoma shall
be located in the City of Enid, County of Garfield.  The Corporation may have
such other offices, either with-in or without the State of Oklahoma, as the
Board of Directors may designate or as the business of the Corporation may
require from time to time.

                              ARTICLE II.  SHAREHOLDERS

          SECTION 1.  ANNUAL MEETING.  The annual meeting of the Shareholders
shall be held on the first Tuesday in the month of December in each year, at the
hour of 10:00 o'clock a.m., for the purpose of electing Directors and for the
transaction of such other business as may come before the meeting.  If the day
fixed for the annual meeting shall be a legal holiday in the State of Oklahoma,
such meeting shall be held on the next succeeding business day.  If the election
of Directors shall not be held on the shareholders, or at any adjournment
thereof, the Board of Directors shall cause the election to be held at a special
meeting of the shareholders as soon thereafter as conveniently may be.

          SECTION 2.  SPECIAL MEETINGS.  Special meetings of the shareholders, 
for any purpose or purposes, may be called by the President or by the Board 
of Directors, and shall be called by the President or at the request of the 
holders of a majority of all the outstanding shares of the Corporation 
entitled to vote at the

<PAGE>

meeting.

          SECTION 3.  PLACE OF MEETING.  Meetings of the shareholders of the
Corporation shall be held at the principal office of the Corporation or at any
other place, within or without the State of Oklahoma, designated by the
President of the Corporation upon his receiving such a request in writing from
the holders of a majority of the outstanding shares of the Corporation.

          SECTION 4.  NOTICE OF MEETING.  Written or printed notice stating
the place, day and hour of the meeting and, in case of a special meeting, the
purpose or purposes for which the meeting is called, shall be delivered not less
than two (2) days before the date of the meeting, either personally or by mail,
by or at the direction of the President, or the Secretary, or the officer or
persons calling the meeting.  If mailed, such notice shall be deemed to be
delivered when deposited in the United States mail, addressed to the
shareholders at his address as it appears on the stock transfer book of the
Corporation, with postage thereon prepaid.  Notice of any meeting may be waived
in writing by any shareholder or by his attendance at the meeting.  Such written
waiver may be given before or after the meeting and shall be filed with
Secretary.

          SECTION 5.  ADJOURNED MEETINGS.  If any meeting of the shareholders
be adjourned for not more than forty (40) days, no notice as to such adjourned
meeting need be given other than announcement at the meeting at which such
adjournment is taken.

                                     -2-
<PAGE>

          SECTION 6.  DETERMINATION OF VOTERS.  Each shareholder shall be
entitled to one vote for each share of stock standing in his or her name on the
books of the Corporation ten (10) days prior to any such meeting.  The stock
ledger shall be the only evidence as to who are shareholders who are entitled to
vote at any adjournment of any such meeting or to receive notice of the meeting,
notwithstanding any transfer of any share on the books of the Corporation after
said date.

          SECTION 7.  VOTING LISTS.  On the day of any meeting of the
shareholders, the Secretary shall have available for inspection at the place of
meeting the share ledger which shall show in alphabetical order all persons
entitled to represent shares at the meeting.

          SECTION 8.  QUORUM.  A majority of the outstanding shares of the
Corporation entitled to vote, represented in person to by proxy, shall
constitute a quorum at a meeting of shareholders.  If less than a majority of
the outstanding shares are represented at a meeting, a majority of the shares so
represented may adjourn the meeting from time to time without further notice. 
At such adjourned meeting at which a quorum shall be present or represented, any
business may be transacted which might have been transacted at the meeting as
originally notified.  The shareholders present at a duly organized meeting may
continue to transact business until adjournment, notwithstanding the withdrawal
of enough shareholders to leave less than a quorum.

          SECTION 9.  PROXIES.  At all meetings of shareholders, a

                                     -3-
<PAGE>

shareholder may vote by proxy executed in writing by the shareholder or by his
duly authorized attorney in fact.  Such proxy shall be filed with the secretary
of the Corporation before or at the time of the meeting.

          SECTION 10.  INFORMAL ACTION BY SHAREHOLDERS.  Unless otherwise
provided by law, any action required to be taken at a meeting of the
shareholders, or any other action which may be taken without if a consent in
writing, setting forth the action so taken, shall be signed by all of the
shareholders entitled to vote with respect to the subject matter thereof.

                           ARTICLE III.  BOARD OF DIRECTORS

          SECTION 1.  GENERAL POWERS.  The business and affairs of the
Corporation shall be managed by its Board of Directors.

          SECTION 2.  NUMBER, ELECTION, TENURE AND QUALIFICATIONS.  The
number of directors which shall constitute the entire board shall not be less
than one (1) nor more than nine (9), and shall consist of two (2) directors
until, within the limits  above specified, a different number of directors,
which shall constitute the wholte board, shall be determined by resolution of
the board.  Each director shall hold office until the next annual meeting of
shareholders and until his successor shall have been elected and qualified.  At
each annual meeting of shareholders, the shareholders shall elect directors for
the ensuing year.

          SECTION 3.  REGULAR MEETINGS.  A regular meeting of the Board of
Directors shall be held without other notice than this bylaw immediately after,
and at the same place as, the annual

                                     -4-
<PAGE>

meeting of shareholders.  The Board of Directors may provide, by resolution, 
the time and place for the holding of additional regular meetings without 
other notice than such resolution.

          SECTION 4.  SPECIAL MEETINGS.  Special meetings of the Board of
Directors may be called by or at the request of the President or any one (1)
director.  The person or persons authorized to call special meetings of the
Board of Directors may fix the place for holding any special meeting of the
Board of Directors called by them.

          SECTION 5.  NOTICE.  Notice of any special meeting shall be given
at least two (2) days previously thereto by written notice delivered personally
or mailed to each director at his business address.  If mailed, such notice
shall be deemed to be delivered when deposited in the United States mail so
addressed, with postage thereon prepaid.  Any directors may waive notice of any
meeting either before or after such meeting.  The attendance of a director at a
meeting shall constitute a waiver of notice of such meeting, except where a
director attends a meeting for the express purpose of objecting to the
transaction of any business because the meeting is not lawfully called or
convened.

          SECTION 6.  QUORUM.  A majority of the number of directors fixed by
Section 2 of this Article III shall constitute a quorum for the transaction of
business at any meeting of the Board of Directors, but if less than such
majority is present at a meeting, a majority of the directors present may
adjourn the meeting from time to time without further notice.  The act of the

                                     -5-
<PAGE>

majority of the directors present at a meeting at which a quorum is present
shall be the act of the Board of Directors.

          SECTION 7.  ACTION WITHOUT A MEETING.  Any action which might be
taken at a meeting of the Board of Directors may be taken without a meeting if a
record or memorandum thereof be made in writing and signed by all members of the
Board.

          SECTION 8.  VACANCIES.  Any vacancy occurring in the Board of
Directors may be filled by the affirmative vote of a majority of the remaining
directors though less than a quorum for the Board of Directors.  A director
elected to fill a vacancy shall be elected for the unexpired term of his
predecessor in office.

          SECTION 9.  COMPENSATION.  By resolution of the Board of Directors,
the Directors may be paid their expenses, if any, of attendance at each meeting
of the Board of Directors, and may be paid a fixed sum for attendance at each
meeting of the Board of Directors or a stated salary as Director.  Any director
may also serve the Corporation in any other capacity and receive compensation
therefor.

          SECTION 10.  REMOVAL.  The entire Board of Directors or any
individual director may be removed from office, with or without cause, by a vote
of the shareholders holding a majority of the outstanding shares entitled to
vote at any annual or special meeting of shareholders.  In the event anyone or
more directors are so removed, new directors may be elected at the same meeting.

          SECTION 11.  INTERESTED DIRECTOR.  Any director who

                                     -6-
<PAGE>

also serves the Corporation in some other office or capacity shall be 
entitled to vote upon his own salary and such vote shall be counted as the 
votes of other directors are counted.

          SECTION 12.  ANNUAL REPORT.  The Board of Directors shall not be
required to furnish an annual report to the shareholders.

          SECTION 13.  POST-INCORPORATION SUBSCRIPTION.  The Board of
Directors shall have authority and power to act upon post-incorporation
subscriptions.

                                ARTICLE IV.  OFFICERS

          SECTION 1.  NUMBER.  The officers of the Corporation shall be such 
officers as may be necessary to enable the corporation to sign instruments 
and stock certificates which comply with the Oklahoma General Corporation 
Act. Such officers may include a Chief Executive Officer, a President, one or 
more Vice-Presidents (who may be designated by different classes), a 
Secretary and a Treasurer, each of whom shall be elected by the Board of 
Directors.  Such other officers and assistant officers as may be deemed 
necessary may be elected or appointed by the Board of Directors.  Any two (2) 
or more offices may be held by the same person, except for President and 
Secretary.  None of the officers, except the President, need be directors.

          SECTION 2.  ELECTION AND TERM OF OFFICE.  The officers of the
Corporation to be elected by the Board of Directors shall be elected annually by
the Board of Directors at the first meeting of the Board of Directors held after
each annual meeting of the 

                                     -7-
<PAGE>

shareholders.  If the election of officers shall not be held at such meeting, 
such election shall be held as soon thereafter as convenient may be.  Each 
officer shall hold office until his successor shall have been duly elected 
and shall have qualified or until his death or until he shall resign or shall 
have been removed in the manner hereinafter provided.

          SECTION 3.  REMOVAL.  Any officer or agent elected or appointed by
the Board of Directors may be removed by the Board of Directors whenever in its
judgment the best interests of the Corporation would be served thereby, but such
removal shall be without prejudice to the contract rights, if any, of the person
so removed.  Any officer or agent may be removed by a vote of the shareholders
of a majority of the outstanding shares, with or without cause.

          SECTION 4.  VACANCIES.  A vacancy in any office because of death,
resignation, removal, disqualification or otherwise, may be filled by the Board
of Directors for the unexpired portion of the term.

          SECTION 5.  CHAIRMAN OF THE BOARD.  The chairman of the board, if
one has been elected, shall preside at all meetings of the board, shareholders
and committees of which he is a member.  He shall have such powers and perform
such duties as may be authorized by the board of directors.   

          SECTION 6.  CHIEF EXECUTIVE OFFICER.  If the board of directors has
elected a chairman of the board, it may designate the chairman of the board as
the chief executive officer of the

                                     -8-
<PAGE>

corporation.  If no chairman of the board has been elected, or in his absence 
or inability to act, or if no such designation has been made by the board of 
directors, the president shall be the chief executive officer of the 
corporation.  The chief executive officer shall (i) have the overall 
supervision of the business of the corporation and shall direct the affairs 
and policies of the corporation, subject to any directions which may be given 
by the board of directors, (ii) shall have authority to designate the duties 
and powers of officers and delegate special powers and duties to specified 
officers, so long as such designations shall not be inconsistent with the 
laws of the State of Oklahoma, these bylaws or action of the board of 
directors, and shall in general have all other powers and shall perform all 
other duties incident to the chief executive officer of a corporation and 
such other powers and duties as may be prescribed by the board of directors 
from time to time.

          SECTION 7.  PRESIDENT.  If the board of directors has elected a
chairman of the board and designated such officer as the chief executive officer
of the corporation, the president shall serve as chief operating officer and be
subject to the control of the board of directors and the chairman of the board. 
He shall have such powers and perform such duties as from time to time may be
assigned to him by the board of directors or the chairman of the board.  If the
board of directors has not elected a chairman of the board, or if one has been
elected and has not been designated the chief executive officer of the
corporation, then

                                     -9-
<PAGE>

the president shall be the chief executive officer of the corporation with 
the powers and duties provided in Article IV, Section 7, of these bylaws.  In 
any event, the president shall have the power to execute, and shall execute, 
bonds, deeds, mortgages, extensions, agreements, modification of mortgage 
agreements, leases and contracts or other instruments of the corporation 
except where required or permitted by law to be otherwise signed and executed 
and except where the signing and execution thereof shall be expressly 
delegated by the board of directors or by the president to some other officer 
or agent of the corporation.  The president may sign with the secretary or an 
assistant secretary, certificates for shares of stock of the corporation, the 
issuance of which shall have been duly authorized by the board of directors, 
and shall vote, or give a proxy to any other person to vote, all shares of 
the stock of any other corporation standing in the name of the corporation.  
The president, in general, shall have all other powers and shall perform all 
other duties as may be prescribed by the board of directors from time to time.

          SECTION 8.  VICE-PRESIDENT.  In the absence of the President or in
the event of his death, inability or refusal to act, the Vice-President (or if
there is more than one vice president, in the order designated by the board,
absent such designation, in the order of their first election to that office)
shall perform the duties of the President, and when so acting, shall have all
the powers of and be subject to all the

                                   -10-
<PAGE>

restrictions upon the President.  The Vice-President shall perform such other 
duties as from time to time may be assigned to him by the Chairman of the 
Board, by the President or by the Board of Directors.

          SECTION 9.  SECRETARY.  The Secretary shall:  (a) keep the minutes
of the shareholders and of the Board of Directors that all notices are duly
given in accordance with the provisions of these bylaws or as required by law;
(b) be custodian of the corporate records and that the seal of the Corporation
is affixed to all documents, the execution of which on behalf of the Corporation
under its seal is duly authorized; and (c) in general, perform all duties as
from time to time may be assigned to him by the President or by the Board of
Directors.

          SECTION 10.  TREASURER.  If required by the Board of Directors, the
Treasurer shall give a bond for the faithful discharge of his duties in such sum
and with such surety or sureties as the Board of Directors shall determine.  He
shall:  (a) have charge and custody of and be responsible for all funds and
securities of the Corporation; receive and give receipts for moneys due and
payable to the Corporation from any source whatsoever, and deposit of all such
moneys in the name of the Corporation in such banks, trust companies or other
depositories as shall be selected in accordance with the provisions of Articles
VI of these bylaws; (b) keep correct and complete records of account showing the
financial condition of the Corporation and furnish a financial statement of
financial condition whenever

                                     -11-
<PAGE>

requested by the Board of Directors; and (c) in general perform all of the 
duties as from time to time may be assigned to him by the President or by the 
Board of Directors.

          SECTION 11.  SALARIES.  The salaries of the Officers shall be fixed 
from time to time by the Board of Directors and no officers shall be 
prevented from receiving such salary by reason of the fact that he is also a 
director of the Corporation.
                                           
                      ARTICLE V.  INDEMNIFICATION OF DIRECTORS,
                                OFFICERS AND EMPLOYEES

          The Corporation shall indemnify any director, officer, or employee, or
former directors, officers, or employees of the Corporation, or any person who
may have served at its request as director, officer, or employee of another
corporation in which it owns shares of stock, or of which it is a creditor,
against expenses actually and necessarily incurred by him in connection with the
defense of any action, suit or proceeding in which he is made a party by reason
of being or having been such director, officer, or employee, except in relation
to matters as to which he shall adjudge in such action, suit, or proceeding to
be liable for negligence or misconduct in the performance of duty.  The
Corporation may also reimburse to any director, officer, or employee the
reasonable costs of settlement of any such action, suit, or proceeding, if it
shall be found by a majority of a committee composed of the directors not
involved in the matter in controversy (whether or not a quorum) that it was to
the interests of the Corporation that such settlement be made and that such

                                     -12-
<PAGE>

director, officer, or employee was not guilty of negligence or misconduct.  Such
rights or indemnification and reimbursement shall not be deemed exclusive of any
other right to which such director, officer, or employee may be entitled under
bylaw, agreement, vote of shareholders, or otherwise.
                                           
                         ARTICLE VI.  NEGOTIABLE INSTRUMENTS,
                                 DEEDS AND CONTRACTS

          SECTION 1.  EXECUTION OF NEGOTIABLE INSTRUMENTS.  All checks,
drafts, notes, bonds, bills of exchange and orders for the payment of money of
the Corporation shall, unless otherwise directed by the Board of Directors, or
unless otherwise required by laws, be signed by any two of the following
officers:  President, Vice-President, Treasurer, Assistant Treasurer, Secretary,
Assistant Secretary.

          SECTION 2.  EXECUTIVE OF DEEDS, CONTRACTS, ETC.  Subject always to
the specific directions of the Board of Directors, all deeds and mortgages made
by the Corporation and all other written contracts and agreements to which the
Corporation shall be a party shall be executed in its name by the President or
the Vice-President and attested by the Secretary, or an Assistant Secretary; and
the Secretary or an Assistant Secretary, when necessary or required, shall affix
the Corporate seal thereto.

          SECTION 3.  DEPOSITS.  All funds of the Corporation not otherwise
employed shall be deposited from time to time to the credit of the Corporation
in such banks, trust companies or other depositories as the Board of Directors
may select.

                                     -13-
<PAGE>

               ARTICLE VII.  CERTIFICATES FOR SHARES AND THEIR TRANSFER

          SECTION 1.  CERTIFICATES FOR SHARES.  Certificates representing
shares of the Corporation shall be in such form as shall be determined by the
Board of Directors.  Such certificates shall be signed by the President and by
the Secretary or by such other officers authorized by law and by the Board of
Directors so to do.  All certificates for shares shall be consecutively numbered
or otherwise identified.  The name and address of the person to whom the shares
and dates of issue, shall be entered on the stock transfer books of the
Corporation.  All certificates surrendered to the Corporation for transfer shall
be cancelled and no new certificate shall be issued until the former certificate
for a like number of shares shall have been surrendered and cancelled, except
that in case of a lost, destroyed or mutilated certificate a new one may be
issued therefor upon such terms and indemnity to the Corporation as the Board of
Directors may prescribe.

          SECTION 2.  TRANSFER OF SHARES.  Transfer of shares of the
Corporation shall be made only on the stock transfer books of the Corporation by
the holder of record thereof or by his legal representative, who shall furnish
proper evidence of authority to transfer, or by his attorney hereunto authorized
by power of attorney duly executed and filed with the Secretary of the
Corporation, and on surrender for cancellation of the certificate for such
shares.  The person in whose name shares stand on the books of the Corporation
shall be deemed by the Corporation to be

                                     -14-
<PAGE>

the owner thereof for all purposes.

          SECTION 3.  RESTRICTIONS ON TRANSFERS.  Any transfer of stock of
the Corporation, whether inter vivos, testate to by operation of law, shall be
made only in the following manner;

                    (a)  The transferor must first offer to the Corporation the
right to redeem such shares upon the affirmative vote of a majority of the Board
of Directors.

                    (b)  If said offer, as provided in (a), is refused, the
transferor must offer the stock to the other shareholders of the Corporation
according to their proportionate holdings.

                    (c)  If said offers as provided in (a) and (b) are refused,
the transferor must offer the stock to any of the shareholders who may wish to
purchase same.

                    (d)  The consideration to be paid for transfers in
accordance with (a), (b) and (c) shall be an amount equal to the proportion of
the total fair market value of the assets of the Corporation which such stock
bears to the total number of outstanding shares or the fair market value of said
stock at the time of transfer, whichever is lesser.

                              ARTICLE VIII.  FISCAL YEAR

          The fiscal year of the Corporation shall begin on the 1st day of
January and end on the 31st day of December in each year.

                                ARTICLE IX.  DIVIDENDS

          SECTION 1.  DECLARATION.  The Board of Directors may from

                                     -15-
<PAGE>

time to time declare, and the Corporation may pay, dividends on its 
outstanding shares in the manner and upon the terms and conditions provided 
by law and its CertificateIncorporation.

          SECTION 2.  DETERMINATION OF SHAREHOLDERS ENTITLED TO DIVIDENDS. 
The Board of Directors shall fix a time, not exceeding forty (40) days preceding
date of payment, as a record date for the determination of shareholders entitled
to dividends, and only registered shareholders on the date so fixed shall be
entitled to such dividends, notwithstanding any transfers of any shares on the
books of the Corporation after the record date.

          The Board of Directors shall provide a corporate seal which shall be
circular in form and shall have inscribed thereon the name of the Corporation
and the state of incorporation and the words, "Corporate Seal".

                                ARTICLE X.  AMENDMENTS

          These bylaws may be altered, amended or repealed or new bylaws may be
adopted in accordance with the Corporation's Certificate of Incorporation and
the Oklahoma General Corporation Act.

                                     -16-

<PAGE>

                        OFFICE OF THE SECRETARY OF STATE
                               STATE OF OKLAHOMA

                                       
                 [GREAT SEAL OF THE STATE OF OKLAHOMA -- 1907]



                          CERTIFICATE OF INCORPORATION


WHEREAS, the Certificate of Incorporation of


                              CONTINENTAL CRUDE CO.


has been filed in the office of the Secretary of State as provided by the 
laws of the State of Oklahoma.

NOW THEREFORE, I, the undersigned, Secretary of State of the State of 
Oklahoma, by virtue of the powers vested in me by law, do hereby issue this 
certificate evidencing such filing.

IN TESTIMONY WHEREOF, I hereunto set my hand and cause to be affixed the 
Great Seal of the State of Oklahoma.

Filed in the City of Oklahoma City this 6th day of May, 1998.

[Great Seal of the State
of Oklahoma -- 1907]

                                         /s/ TOM COLE
                                         ----------------------------
                                         Secretary of State

                                    By:  /s/ BETH R. GARNER
                                         ----------------------------

<PAGE>

                        CERTIFICATE OF INCORPORATION
                                       

STATE OF OKLAHOMA   )
                    )    ss.
COUNTY OF OKLAHOMA  )


               TO SECRETARY OF STATE OF THE STATE OF OKLAHOMA


                                  ARTICLE ONE

The name of this Corporaiton is:

                             CONTINENTAL CRUDE CO.


                                  ARTICLE TWO

The address of its registered office in the State of Oklahoma is:

302 N. Independence, Enid, Oklahoma  73701


                                 ARTICLE THREE

The name of its registered agent is:  Harold Hamm.


                                  ARTICLE FOUR

The duration of the corporation is perpetual.


                                  ARTICLE FIVE

The purposes for which this Corporation is fored are:

     1.   To engage in the business of oil and gas marketing;

     2.   To engage in any lawful act or activity for which corporations may
          organize under the general corporation laws of Oklahoma.


                                  ARTICLE SIX

                                     -2-
<PAGE>

The aggregate number of shares which the corporation shall have authority to 
issue, the designation of each class, the number of shares of each class, and 
the par value of each class are as follows:

          Class - Common

          Total number of shares - 3,000

          Par value - $1.00

          Total Authorized Capital - $3,000.00


                                 ARTICLE SEVEN

The name and mailing address of the incorporator is:

Harold Hamm, 302 N. Independence, Enid, Oklahoma  73701.

     THE UNDERSIGNED, for the purpose of forming a corporation under the laws 
of the State of Oklahoma does hereby certify that the facts herein stated are 
true, and has accordingly hereunto set his hand this 6th day of May, 1998.

                                        /s/ HAROLD HAMM
                                        ------------------------
                                        Signature





                                    -3-

<PAGE>
                           BYLAWS
                            OF
                   CONTINENTAL CRUDE CO.
                       July 1, 1998
<TABLE>
<CAPTION>
                                      
                                                           Page
                                                           ----
<S>                                                        <C>
Article I - Shareholders' Meetings ........................ 1

  Section 1 - Annual Meeting .............................. 1
  Section 2 - Special Meetings ............................ 1
  Section 3 - Notice of Meetings .......................... 1
  Section 4 - Quorum ...................................... 2
  Section 5 - Voting ...................................... 2
  Section 6 - List of Shareholders ........................ 2
  Section 7 - Action by Written Consent of Shareholders ... 2
  Section 8 - Order of Business............................ 3

Article II - Directors .................................... 3

  Section 1 - Powers ...................................... 3
  Section 2 - Number ...................................... 3
  Section 3 - Vacancies.................................... 3
  Section 4 - Place of Meetings ........................... 3
  Section 5 - Regular Meetings ............................ 3
  Section 6 - Special Meetings ............................ 3
  Section 7 - Quorum ...................................... 4
  Section 8 - Presence at Meeting ......................... 4
  Section 9 - Action Without Meeting ...................... 4
  Section 10- Committees of the Board ..................... 4
  Section 11- Compensation ................................ 5
  Section 12- Advisory Directors .......................... 5

Article III - Officers and Employees ...................... 5

  Section 1 - Election .................................... 5
  Section 2 - Term, Removal and Vacancies ................. 5
  Section 3 - Chairman of the Board ....................... 5
  Section 4 - Chief Executive Officer ..................... 6
  Section 5 - President ................................... 6
  Section 6 - Vice Presidents ............................. 7
  Section 7 - Secretary ................................... 7
  Section 8 - Treasurer ................................... 7
  Section 9 - Divisional Officers ......................... 7

Article IV - Stock Certificates and Transfer Books ........ 7

  Section l - Certificates ................................ 7
  Section 2 - Record Ownership ............................ 8
  Section 3 - Transfer Agent and Registrar................. 8
  Section 4 - Lost Certificates ........................... 8
  Section 5 - Transfer of Stock ........................... 8
  Section 6 - Fixing Date for Determination of Share-
                 holders of Record ........................ 9
<PAGE>

Article V - General Provisions ............................ 9

  Section 1 - Offices ..................................... 9
  Section 2 - Voting of Stock ............................. 9
  Section 3 - Notices ..................................... 9
  Section 4 - Waiver of Notice ............................ 10

Article VI - Indemnification of Officers,
                Directors, Employees and Agents ........... 10

  Section 1 - Actions Other Than in the Right of the 
                Corporation ............................... 10
  Section 2 - Actions by or in the Right of the 
                Corporation ............................... 10
  Section 3 - Advancement of Expenses ..................... 11
  Section 4 - Insurance ................................... 11
  Section 5 - Indemnification Required .................... 11
  Section 6 - Entitlement; Nonexclusivity ................. 11
      
Article VII - Amendments .................................. 12
</TABLE>
                                   ii
<PAGE>

                                        BYLAWS
                                          OF
                                CONTINENTAL CRUDE CO.

                                      ARTICLE I

                                SHAREHOLDERS' MEETINGS

SECTION 1.  ANNUAL MEETING.  The annual meeting of shareholders for the election
of directors and the transaction of such other business as may properly come
before the meeting shall be held at 10:00 a.m. on the first Tuesday in the month
of December of each year or at such other time as shall be determined by the
board of directors.  If the day fixed for the annual meeting is a legal holiday,
such meeting shall be held on the next succeeding business day.  The meeting
shall be held at the principal offices of the corporation or at such other place
as shall be determined by a majority of the directors.

SECTION 2.  SPECIAL MEETINGS.  Special meetings of shareholders may be called by
the board of directors, or by the president, and shall be held at such places,
within or without the State of Oklahoma, as may be specified in the call of any
meeting.  Further, the president, or in his absence, the secretary, shall call a
special meeting at the request in writing of shareholders owning not less than a
majority of the entire capital stock of the corporation issued and outstanding
and entitled to vote, provided that such request states the purpose or purposes
for the proposed meeting.

SECTION 3.  NOTICE OF MEETINGS.  Unless otherwise provided in the Oklahoma
General Corporation Act, written notice of every meeting of shareholders stating
the place, date, hour and, in the case of a special meeting, purposes thereof,
shall, except when otherwise required by law, be given not less than two (2) nor
more than sixty (60) days before the date of the meeting to each shareholder
entitled to vote thereat; provided that such notice may be waived in writing,
signed by the person entitled to notice either before or after the time stated
therein.  Neither the business to be transacted at nor the purpose of any
meeting need be specified in such written waiver of notice.

     At any meeting at which a quorum of shareholders is present, in person
or represented by proxy, the chairman of the meeting or the holders of the
majority of the shares of stock present or represented by proxy may adjourn from
time to time until the meeting's business is completed.  At the adjourned
meeting, the corporation may transact any business which might have been
transacted at the original meeting.  If the adjournment is for more than thirty
days, or if after the adjournment a new record date is fixed for the adjourned
meeting, a notice of the adjourned meeting shall be given to each shareholder of
record entitled to vote at the meeting.  Otherwise, no notice need be

<PAGE>

given.

     If mailed, notice shall be deemed to be given when deposited in the
United States mail, addressed to the shareholder at his address as it appears on
the records of the corporation, with postage thereon prepaid.

SECTION 4.  QUORUM.  The holders of a majority of the shares of stock entitled
to vote, present in person or by proxy, shall, except as otherwise provided by
law, constitute a quorum for the transaction of business at all meetings of the
shareholders.   

SECTION 5.  VOTING.  Each shareholder shall at every meeting of shareholders be
entitled to one vote, in person or by proxy, for each share of stock having
voting power held by such shareholder.  Unless otherwise provided by law, no
proxy shall be voted on after three years from its date unless the proxy
provides for a longer period.  All matters other than elections shall be decided
by a majority of the votes in person or by proxy, except as otherwise required
by the laws of Oklahoma.  All elections of directors shall be decided by a
plurality.

SECTION 6.  LIST OF SHAREHOLDERS.  Unless otherwise provided in the Oklahoma 
General Corporation Act, at least ten days before every meeting of 
shareholders, a complete list of the shareholders entitled to vote at the 
meeting, arranged in alphabetical order, and showing the address of each 
shareholder, and the number of shares registered in the name of each 
shareholder, shall be prepared by the officer in charge of the stock ledger.  
Such list shall be open to the examination of any shareholder, for any 
purpose germane to the meeting, during ordinary business hours, for a period 
of at least ten days prior to the meeting, either at a place within the city 
where the meeting is to be held, which place shall be specified in the notice 
of the meeting, or, if not specified, at the place where the meeting is to be 
held.  The list shall also be produced and kept at the time and place of the 
meeting during the whole time thereof and may be inspected by any shareholder 
who is present.  The stock ledger shall be the only evidence as to who are 
shareholders entitled to examine the stock ledger, the list required by this 
section or the books of the corporation, or to vote in person or by proxy at 
any meeting of shareholders.

SECTION 7.  ACTION BY WRITTEN CONSENT OF SHAREHOLDERS.  Any action required or
permitted to be taken at a meeting of the shareholders may be taken without a
meeting, without prior notice and without a vote, if a consent in writing,
setting forth the action so taken, shall be signed by the holders of outstanding
stock having not less than the minimum number of votes which would be necessary
to authorize or take such action at a meeting at which all shares entitled to
vote thereon were present and voted.  The board of

                                     -2-
<PAGE>

directors may fix, in advance, the record date for determining shareholders 
entitled to express consent to corporate action in writing without a meeting, 
which shall not be more than sixty (60) days prior to the taking of such 
action.  Prompt notice of the taking of corporate action without a meeting by 
less than unanimous written consent shall be given to those shareholders who 
have not consented in writing.

SECTION 8.  ORDER OF BUSINESS.  The chairman of the meeting shall determine the
order of business and the procedure at the meeting, including regulation of the
manner of voting and the conduct of discussion.

                                      ARTICLE II

                                      DIRECTORS

SECTION 1.  POWERS.  The business and affairs of the corporation shall be
managed by or under the direction of its board of directors.

SECTION 2.  NUMBER.  The number of directors which shall constitute the entire
board shall not be less than two (2) nor more than nine (9) and shall consist of
three (3) directors until, within the limits above specified, a different number
of directors, which shall constitute the whole board, shall be determined by
resolution of the board.

SECTION 3.  VACANCIES.  Vacancies and newly created directorships resulting from
any increase in the authorized number of directors may be filled by a majority
of the directors then in office, though less than a quorum, and the directors so
chosen shall hold office until the next annual election of the class for which
each such director has been chosen and until his successor is duly elected and
qualified, or until his earlier resignation or removal.

SECTION 4.  PLACE OF MEETINGS.   Board meetings may be held at such places,
within or without the State of Oklahoma, as stated in these bylaws or as the
board may from time to time determine or as may be specified in the call of any
meetings.

SECTION 5.  REGULAR MEETINGS.  The annual meeting of the board shall be held
without call or notice immediately after and at the same general place as the
annual meeting of the shareholders, for the purpose of electing officers and
transacting any other business that may properly come before the meeting. 
Additional regular meetings of the board may be held without call or notice at
such place and at such time as shall be fixed by resolution of the board but in
the absence of such resolution shall be held upon call by the president or a
majority of directors.

                                     -3-
<PAGE>

SECTION 6.  SPECIAL MEETINGS.  Special meetings of the board may be called by
the chairman of the board or the president or by a majority of the directors
then in office.  Notice of special meetings shall be given to each director at
least two (2) days before the meeting.  Such notice shall set forth the time and
place of such meeting, but need not, unless otherwise required by law, state the
purposes of the meeting.  A majority of the directors present at any meeting may
adjourn the meeting from time to time without notice other than announcement at
the meeting.

SECTION 7.  QUORUM.  A majority of the total number of directors, excluding any
vacancies, shall constitute a quorum for the transaction of business at any
meeting of the board; provided, however, that in no event shall a number which
is less than one-third (1/3) of the total number of directors constitute a
quorum.  If at any meeting a quorum is not present, a majority of the directors
present may adjourn the meeting from time to time without notice other than
announcement at the meeting until a quorum is present.  The act of a majority of
directors present in person at a meeting at which a quorum is present shall be
the act of the board of directors.

SECTION 8.  PRESENCE AT MEETING.  Members of the board of directors, or of any
committee thereof, may participate in a meeting of such board or committee by
means of conference telephone or similar communications equipment by means of
which all persons participating in the meeting can hear each other, and such
participation shall be deemed presence in person at such meeting.

SECTION 9.  ACTION WITHOUT MEETING.  Any action required or permitted to be
taken at any meeting of the board of directors, or of any committee thereof, may
be taken without a meeting if all members of the board or such committee, as the
case may be, consent thereto in writing, and such written consent is filed with
the minutes of the proceedings of the board or such committee.

SECTION 10.  COMMITTEES OF THE BOARD.  The board of directors may, by 
resolution passed by a majority of the whole board, designate one or more 
committees, each such committee to consist  of one or more of the directors 
of the corporation and have such name or names as may be determined from time 
to time by resolution adopted by the board.  The board may designate one or 
more directors as alternate members of any committee who may replace any 
absent or disqualified member at any meeting of the committee.  Any such 
committee, to the extent provided in the resolution, shall have and may 
exercise the powers of the board of directors in the management of the 
business and affairs of the corporation, and generally perform such duties 
and exercise such powers as may be directed or delegated by the board of 
directors from time to time, and, furthermore, may authorize the seal of the 
corporation to be

                                     -4-
<PAGE>

affixed to all papers which may require it. In the absence or 
disqualification of any member of such committee or committees, the member or 
members thereof present at any meeting and not disqualified from voting, 
whether or not he or they constitute a quorum, may unanimously appoint 
another member of the board to act at the meeting in the place of such absent 
or disqualified member.  Each such committee shall keep regular minutes of 
its proceedings and report the same to the board of directors as and when 
required.

SECTION 11.  COMPENSATION.  Each director shall be reimbursed for reasonable
expenses incurred in attending any meeting of the board or of any committee of
which such director shall be a member.  The board may by resolution allow
reasonable fees to some or all of the directors for attendance at any board or
committee meeting.  No such payment shall preclude any directors from serving
the corporation in any other capacity and receiving compensation therefor.

SECTION 12.  ADVISORY DIRECTORS.  The board of directors may appoint individuals
who may but need not be directors, officers, or employees of the corporation to
serve as members of an advisory board of directors of the corporation and may
fix fees or compensation for attendance at meetings of any such advisory boards.
The members of any such advisory board may adopt and from time to time may amend
rules and regulations for the conduct of their meetings and shall keep minutes
which shall be submitted to the board of directors of the corporation.  The term
of office of any member of the advisory board of directors shall be at the
pleasure of the board of directors and shall expire the day of the annual
meeting of the shareholders of the corporation.  The function of any such
advisory board of directors shall be to advise with respect to the affairs of
the corporation.


                                     ARTICLE III

                                OFFICERS AND EMPLOYEES

SECTION 1.  ELECTION.  At the annual meeting of the board, there shall be 
elected such officers as may be necessary to enable the corporation to sign 
instruments and stock certificates which comply with the Oklahoma General 
Corporation Act.  Such officers may include a chairman of the board, chief 
executive officer, a president, one or more vice presidents (who may be 
designated by different classes), a secretary, a treasurer and other 
officers. No officer need be a director.  Two or more offices may be held by 
the same person.

SECTION 2.  TERM, REMOVAL AND VACANCIES.  All officers shall serve at the
pleasure of the board.  Any officer elected or appointed by the board may be
removed at any time by the board whenever in its 

                                     -5-
<PAGE>

judgment the best interests of the corporation would be served thereby, but 
such removal shall be without prejudice to the contract rights, if any, of 
the person so removed.  A vacancy in any office shall be filled by the board 
of directors.

SECTION 3.  CHAIRMAN OF THE BOARD.  The chairman of the board, if one has been
elected, shall preside at all meetings of the board, shareholders and committees
of which he is a member.  He shall have such powers and perform such duties as
may be authorized by the board of directors.   

SECTION 4.  CHIEF EXECUTIVE OFFICER.  If the board of directors has elected a 
chairman of the board, it may designate the chairman of the board as the 
chief executive officer of the corporation.  If no chairman of the board has 
been elected, or in his absence or inability to act, or if no such 
designation has been made by the board of directors, the president shall be 
the chief executive officer of the corporation.  The chief executive officer 
shall (i) have the overall supervision of the business of the corporation and 
shall direct the affairs and policies of the corporation, subject to any 
directions which may be given by the board of directors, (ii) shall have 
authority to designate the duties and powers of officers and delegate special 
powers and duties to specified officers, so long as such designations shall 
not be inconsistent with the laws of the State of Oklahoma, these bylaws or 
action of the board of directors, and shall in general have all other powers 
and shall perform all other duties incident to the chief executive officer of 
a corporation and such other powers and duties as may be prescribed by the 
board of directors from time to time.

SECTION 5.  PRESIDENT.  If the board of directors has elected a chairman of 
the board and designated such officer as the chief executive officer of the 
corporation, the president shall serve as chief operating officer and be 
subject to the control of the board of directors and the chairman of the 
board.  He shall have such powers and perform such duties as from time to 
time may be assigned to him by the board of directors or the chairman of the 
board.  If the board of directors has not elected a chairman of the board, or 
if one has been elected and has not been designated the chief executive 
officer of the corporation, then the president shall be the chief executive 
officer of the corporation with the powers and duties provided in Article 
III, Section 4, of these bylaws.  In any event, the president shall have the 
power to execute, and shall execute, bonds, deeds, mortgages, extensions, 
agreements, modification of mortgage agreements, leases and contracts or 
other instruments of the corporation except where required or permitted by 
law to be otherwise signed and executed and except where the signing and 
execution thereof shall be expressly delegated by the board of directors or 
by the president to some other officer or agent of the corporation.  The 
president

                                     -6-
<PAGE>

may sign with the secretary or an assistant secretary, certificates 
for shares of stock of the corporation, the issuance of which shall have been 
duly authorized by the board of directors, and shall vote, or give a proxy to 
any other person to vote, all shares of the stock of any other corporation 
standing in the name of the corporation.  The president, in general, shall 
have all other powers and shall perform all other duties as may be prescribed 
by the board of directors from time to time.

SECTION 6.  VICE PRESIDENTS.  A vice president shall perform such duties as may
from time to time be assigned to him by the board or by the chairman or the
president.  In the absence or inability to act of the president, the vice
president (or if there is more than one vice president, in the order designated
by the board and, absent such designation, in the order of their first election
to that office) shall perform the duties and discharge the responsibilities of
the president.

SECTION 7.  SECRETARY.  The secretary shall be the keeper of the corporate 
records, and shall give notice of, attend, and record minutes of meetings of 
shareholders and directors. He shall, in general, perform all duties incident 
to the office of secretary and such other duties as may be assigned to him by 
the board or by the president.  The assistant secretaries, if any, shall have 
such duties as shall be delegated to them by the secretary and, in the 
absence of the secretary, the senior of them present shall discharge the 
duties of the secretary.

SECTION 8.  TREASURER.  The treasurer shall be responsible for (i) the custody
and safekeeping of all of the funds and securities of the corporation, (ii) the
receipt and deposit of all moneys paid to the corporation, (iii) where necessary
or appropriate, the endorsement for collection on behalf of the corporation of
all checks, drafts, notes and other obligations payable to the corporation, (iv)
the disbursement of funds of the corporation under such rules as the board may
from time to time adopt, (v) maintaining the general books of account of the
corporation, and (vi) the performance of such further duties as are incident to
the office of treasurer or as may be assigned to him by the board or by the
president.  The assistant treasurers, if any, shall have such duties as shall be
delegated to them by the treasurer, and in the absence of the treasurer, the
senior one of them present shall discharge the duties of the treasurer.

SECTION 9.  DIVISIONAL OFFICERS.  The board may from time to time appoint 
officers of various divisions of the corporation.  Divisional officers shall 
not by virtue of such appointment become officers of the corporation.  
Subject to the direction of the president of the corporation, the president 
of a division shall have general charge, control and supervision of all the 
business operations of his division, and the other divisional officers shall 

                                    -7-
<PAGE>

have such duties and authority as may be prescribed by the president of the 
division.

                                      ARTICLE IV

                        STOCK CERTIFICATES AND TRANSFER BOOKS

SECTION 1.  CERTIFICATES.  Every shareholder shall be entitled to have a 
certificate in such form as the board shall from time to time approve, signed 
by, or in the name of the corporation by (i) the chairman of the board, if 
any, the president or any vice president and (ii) the treasurer, or assistant 
treasurer, or the secretary or an assistant secretary, certifying the number 
of shares owned by him in the corporation.  During the time in which the 
corporation is authorized to issue more than one class of stock or more than 
one series of any class, there shall be set forth on the face or back of each 
certificate issued a statement that the corporation will furnish without 
charge to each shareholder who so requests, the designations, preferences and 
relative, participating, option or other special rights of each class of 
stock or series thereof of the corporation and the qualifications, 
limitations or restrictions of such preferences and/or rights.

     The signatures of any of the officers on a certificate may be 
facsimiles.  In case any officer who has signed or whose facsimile signature 
has been placed upon a certificate shall have ceased to be such officer 
before such certificate is issued, it may be issued by the corporation with 
the same effect as if he were such officer at the date of issue.

SECTION 2.  RECORD OWNERSHIP.  A record of the name and address of the holder 
of each certificate, the number of shares represented thereby, and the date 
of issue thereof shall be made on the corporation's books.  The corporation 
shall be entitled to treat the holder of record of any share or shares of 
stock as the holder in fact thereof, and, accordingly, shall not be bound to 
recognize any equitable or other claim to or interest in any share on the 
part of any other person, whether or not it shall have express or other 
notice thereof, except as required by the laws of Oklahoma.

SECTION 3.  TRANSFER AGENT AND REGISTRAR.  The corporation may maintain one 
or more transfer offices or agencies, each in charge of a transfer agent 
designated by the board, where the shares of stock of the corporation shall 
be transferable.  The corporation may also maintain one or more registry 
offices, each in charge of a registrar designated by the board, wherein such 
shares of stock shall be registered.  To the extent authorized by the board, 
the same entity may serve both as a transfer agent and registrar.

                                     -8-
<PAGE>

SECTION 4.  LOST CERTIFICATES.  Any person claiming a stock certificate in 
lieu of one lost, stolen, mutilated or destroyed shall give the corporation 
an affidavit as to his ownership of the certificate and of the facts which go 
to prove its loss, theft, mutilation or destruction.  He shall also, if 
required by the board, give the corporation a bond, in such form as may be 
approved by the board, sufficient to indemnify the corporation against any 
claim that may be made against it on account of the alleged loss or theft of 
the certificate or the issuance of a new certificate.

SECTION 5.  TRANSFER OF STOCK.  Transfer of shares shall, except as provided 
in Section 4 of this Article IV, be made on the books of the corporation only 
by direction of the person named in the certificate or his attorney, lawfully 
constituted in writing, and only upon surrender for cancellation of the 
certificate therefor, duly endorsed or accompanied by a written assignment of 
the shares evidenced thereby.

SECTION 6.  FIXING DATE FOR DETERMINATION OF SHAREHOLDERS OF RECORD.

     (a)  In order that the corporation may determine the shareholders 
entitled to notice of or to vote at any meeting of shareholders or any 
adjournment thereof, or to express consent to any corporate action in writing 
without a meeting, or entitled to receive payment of any dividend or other 
distribution or allotment of any rights, or entitled to exercise any rights 
in respect of any change, conversion or exchange of stock or for the purpose 
of any other lawful action, the board may fix, in advance, a record date, 
which shall not be more than sixty (60) nor less than ten (10) days before 
the date of such meetings, nor more than sixty (60) prior to any other action.

     (b)  A determination of shareholders of record entitled to notice of and 
to vote at a meeting of shareholders shall apply to any adjournment of the 
meeting; provided, however, that the board may fix a new record date for the 
adjourned meeting.

                                      ARTICLE V

                                  GENERAL PROVISIONS

SECTION 1.  OFFICES.  The principal office of the corporation shall be 
maintained in Enid, Oklahoma, or at such other place as the board may 
determine. The corporation may have such other offices as the board may from 
time to time determine.

SECTION 2.  VOTING OF STOCK.  Unless otherwise ordered by the board, the 
chairman of the board, if any, the president or any

                                     -9-
<PAGE>

vice president shall have full power and authority, in the name and on behalf 
of the corporation, to attend, act and vote at any meeting of shareholders of 
any company in which the corporation may hold shares of stock, and at any 
such meeting shall possess and may exercise any and all rights and powers 
incident to the ownership of such shares and which, as the holder thereof, 
the corporation might possess and exercise if personally present, and may 
exercise such power and authority through the execution of proxies or may 
delegate such power and authority to any other officer, agent or employee of 
the corporation.

SECTION 3.  NOTICES.  Unless otherwise provided herein, whenever notice is
required to be given, it shall not be construed to require personal notice, but
such notice may be given in writing by depositing the same in the United States
mail, addressed to the individual to whom notice is being given at such address
as appears on the records of the corporation, with postage there on prepaid. 
Such notice shall be deemed to be given at the time when the same shall be thus
deposited.

SECTION 4.  WAIVER OF NOTICE.  Whenever any notice is required to be given, a
waiver thereof in writing, signed by the person or persons entitled to the
notice, whether before or after the time stated therein, shall be deemed
equivalent thereto.


                                      ARTICLE VI

                       INDEMNIFICATION OF OFFICERS, DIRECTORS,
                                 EMPLOYEES AND AGENTS         

SECTION 1.  ACTIONS OTHER THAN IN THE RIGHT OF THE CORPORATION.  The 
corporation shall indemnify any person who was or is a party or is threatened 
to be made a party to any threatened, pending or completed action, suit or 
proceeding whether civil, criminal, administrative or investigative (other 
than an action by or in the right of the corporation) by reason of the fact 
that he is or was a director, officer, employee or agent of the corporation 
or is or was serving at the request of the corporation as a director, 
officer, employee or agent of another corporation, partnership, joint venture 
or other enterprise against expenses (including attorney's fees), judgments, 
fines and amounts paid in settlement actually and reasonably incurred by him 
in connection with such action, suit or proceeding, if he acted in good faith 
and in a manner he reasonably believed to be in or not opposed to the best 
interest of the corporation and, with respect to any criminal action or 
proceeding, had no reasonable cause to believe that his conduct was unlawful. 
The termination of any action, suit or proceeding by judgment, order, 
settlement, conviction or upon a plea of nolo contendere or its equivalent 
shall not of itself create a presumption that the person did not act in good 
faith and

                                     -10-
<PAGE>

in a manner which he reasonably believed to be in or not opposed to 
the best interest of the corporation and with respect to any criminal action 
or proceeding had reasonable cause to believe that his conduct was unlawful.

SECTION 2.  ACTIONS BY OR IN THE RIGHT OF THE CORPORATION.  The corporation 
shall indemnify any person who was or is a party or is threatened to be made 
a party to any threatened, pending or completed action or suit by or in the  
right of the corporation to procure a judgment in its favor by reason of the 
fact that he is or was a director, officer, employee or agent of the 
corporation or is or was serving at the request of the corporation as a 
director, officer, employee or agent of another corporation, partnership, 
joint venture, trust or other enterprise against expenses (including 
attorney's fees) actually and reasonably incurred by him in connection with 
the defense or settlement of such action or suit, if he acted in good faith 
and in a manner he reasonably believed to be in or not opposed to the best 
interest of the corporation; except that no indemnification shall be made in 
respect of any claim, issue or matter as to which such person shall have been 
adjudged to be liable to the corporation unless and only to the extent that 
the court in which such action or suit was brought shall determine, upon 
application, that despite the adjudication of liability, but in the view of 
all the circumstances of the case, such person is fairly and reasonably 
entitled to indemnity for such expenses which the court shall deem proper.

SECTION 3.  ADVANCEMENT OF EXPENSES.  Expenses incurred in defending a civil or
criminal action, suit or proceeding may be paid by the corporation in advance of
the final disposition of such action, suit or proceeding upon receipt of an
undertaking by or on behalf of the director, officer, employee or agent to repay
such amount if it shall ultimately be determined that he is not entitled to be
indemnified by the corporation as authorized herein.

SECTION 4.  INSURANCE.  The corporation may purchase (upon resolution duly
adopted by the board of directors) and maintain insurance on behalf of any
person who is or was a director, officer, employee or agent of the corporation,
or is or was serving at the request of the corporation as a director, officer,
employee or agent of another corporation, partnership, joint venture, trust or
other enterprise against any liability asserted against him and incurred by him
in any such capacity, or arising out of his status as such, whether or not the
corporation would have the power to indemnify him against such liability.

SECTION 5.  INDEMNIFICATION REQUIRED.  To the extent that a director, officer,
employee or agent of the corporation has been successful on the merits or
otherwise in defense of any action,

                                     -11-
<PAGE>

suit, or proceeding referred to herein or in defense of any claim, issue or 
matter therein, he shall be indemnified against expenses (including 
attorneys' fees) actually and reasonably incurred by him in connection 
therewith.

SECTION 6.  ENTITLEMENT; NONEXCLUSIVITY.  Every such person shall be 
entitled, without demand by him upon the corporation or any action by the 
corporation, to enforce his right to such indemnity in an action at law 
against the corporation. The right of indemnification and advancement of 
expenses hereinabove provided shall not be deemed exclusive of any rights to 
which any such person may now or hereafter be otherwise entitled and 
specifically, without limiting the generality of the foregoing, shall not be 
deemed exclusive of any rights pursuant to statute or otherwise, of any such 
person in any such action, suit or proceeding to have assessed or allowed in 
his favor against the corporation or otherwise, his costs and expenses 
incurred therein or in connection therewith or any part thereof.

                                     ARTICLE VII

                                      AMENDMENTS

     These bylaws may be altered, amended or repealed or new bylaws may be
adopted in accordance with the corporation's Certificate of Incorporation and
the Oklahoma General Corporation Act.


                                     -12-

<PAGE>





                                     -13-
<PAGE>




                                     -14-

<PAGE>

          INDENTURE dated as of July 24, 1998 among Continental Resources, Inc.,
an Oklahoma corporation (the "COMPANY"), as issuer, the Subsidiary Guarantors
(as hereinafter defined) as guarantors and United States Trust Company of New
York, as trustee (the "TRUSTEE").

          The Company, the Subsidiary Guarantors and the Trustee agree as 
follows for the benefit of each other and for the equal and ratable benefit 
of the Holders (as hereinafter defined) of the 10 1/4% Senior Subordinated 
Notes due 2008 of the Company (the "INITIAL SECURITIES"), and if and when 
issued in exchange for Initial Securities as provided in the Registration 
Rights Agreement (as hereinafter defined), the Company's 10 1/4% Senior 
Subordinated Notes due 2008 (the "EXCHANGE SECURITIES" and, together with the 
Initial Securities, the "SECURITIES"):

                                      ARTICLE 1
                            DEFINITIONS AND INCORPORATION
                                     BY REFERENCE

          Section 1.1.  DEFINITIONS.

          "ACQUIRED DEBT" means, with respect to any specified Person (i)
Indebtedness of any other Person existing at the time such other Person is
merged with or into or becomes a Subsidiary of such specified Person, including,
without limitation, Indebtedness incurred in connection with, or in
contemplation of, such other Person merging with or into or becoming a
Subsidiary of such specified Person, and (ii) Indebtedness secured by a Lien
encumbering any asset acquired by such specified Person.

          "AFFILIATE" of any specified Person means any other Person directly or
indirectly controlling or controlled by or under direct or indirect common
control with such specified Person.  For purposes of this definition, "control"
(including, with correlative meanings, the terms "controlling," "controlled by"
and "under common control with"), as used with respect to any Person, shall mean
the possession, directly or indirectly, of the power to direct or cause the
direction of the management or policies of such Person, whether through the
ownership of voting securities, by agreement or otherwise.

          "AGENT" means any Registrar, Paying Agent or co-registrar.

          "APPLICABLE PREMIUM" means, with respect to a Security at the
redemption date, the greater of (i) 1% of the principal amount of such Security
and (ii) the excess of (A) the present value at such time of (1) the redemption
price of such Security at August 1, 2003, as set forth in Section 3.7, PLUS (2)
all required interest payments (excluding accrued but unpaid interest) due on
such Security through August 1, 2003, computed


<PAGE>

                                                                              2

using a discount rate equal to the Treasury Rate plus 50 basis 
points, over (B) the then-outstanding principal amount of such Security.

          "ASSET SALE" means (i) the sale, lease, conveyance or other
disposition by the Company or any of its Restricted Subsidiaries (but excluding
the creation of a Lien) of any assets including, without limitation, by way of a
sale and leaseback; PROVIDED that the sale, lease, conveyance or other
disposition of all or substantially all of the assets of the Company and its
Subsidiaries taken as a whole shall be governed by Sections 4.13 and/or 5.1
hereof and not by Section 4.10 hereof), and (ii) the issue or sale by the
Company or any of its Restricted Subsidiaries of Equity Interests of any of the
Company's Subsidiaries (including the sale by the Company or a Restricted
Subsidiary of Equity Interests in an Unrestricted Subsidiary), in the case of
either clause (i) or (ii), whether in a single transaction or a series of
related transactions (a) that have a fair market value in excess of $5.0 million
or (b) for net proceeds in excess of $5.0 million.  Notwithstanding the
foregoing, the following shall not be deemed to be Asset Sales:  (1) a transfer
of assets by the Company to a Wholly Owned Restricted Subsidiary of the Company
or by a Wholly Owned Restricted Subsidiary of the Company to the Company or to
another Wholly Owned Restricted Subsidiary of the Company, (2) an issuance of
Equity Interests by a Wholly Owned Restricted Subsidiary of the Company to the
Company or to another Wholly Owned Restricted Subsidiary of the Company, (3) the
making of a Permitted Investment or a Restricted Payment that is permitted by
Section 4.7 PROVIDED that the sale, lease, conveyance or other disposition by
the Company or any of its Restricted Subsidiaries of an Investment shall be
deemed an Asset Sale, (4) the abandonment, farm-out, lease or sublease of
undeveloped oil and gas properties in the ordinary course of business, (5) the
trade or exchange by the Company or any Restricted Subsidiary of the Company of
any oil and gas property owned or held by the Company or such Restricted
Subsidiary for any oil and gas property or interest therein owned or held by
another Person, including any cash or Cash Equivalents necessary in order to
achieve an exchange of equivalent value; provided that any such cash or Cash
Equivalents received by the Company or such Restricted Subsidiary will be
subject to the provisions described in the second and third paragraphs in
Section 4.10 which the Board of Directors of the Company determines in good
faith to be of approximately equivalent value, (6) the sale or transfer of
hydrocarbons or other mineral products in the ordinary course of business, (7)
the sale of oil and gas properties in connection with tax credit transactions
complying with Section 29 or any successor or analogous provisions of the
Internal Revenue Code of 1986, as amended (the "Code") or (8) the sale or
transfer of surplus or obsolete equipment in the ordinary course of business. 

          "ATTRIBUTABLE DEBT" in respect of a sale and leaseback transaction
means, at the time of determination, the present value (discounted at the rate
of interest implicit in such 

<PAGE>

                                                                              3

transaction, determined in accordance with GAAP) of the obligation of the 
lessee for net rental payments during the remaining term of the lease 
included in such sale and leaseback transaction (including any period for 
which such lease has been extended or may, at the option of the lessor, be 
extended.

          "BANKRUPTCY CODE" means Title 11 of the United States Code, as
amended.

          "BOARD OF DIRECTORS" means the Board of Directors of the Company or a
Subsidiary Guarantor, as applicable, or any authorized committee of such Board
of Directors.

          "BORROWING BASE" means, as of any date, the aggregate amount of
borrowing availability as of such date under all Credit Facilities that
determines availability on the basis of a borrowing base or other asset-based
calculation.

          "BUSINESS DAY" means any day other than a Legal Holiday.

          "CAPITAL LEASE OBLIGATION" means, at the time any determination
thereof is to be made, the amount of the liability in respect of a capital lease
that would at such time be required to be capitalized on a balance sheet in
accordance with GAAP.

          "CAPITAL STOCK" means (i) in the case of a corporation, corporate
stock, (ii) in the case of an association or business entity, any and all
shares, interests, participations, rights or other equivalents (however
designated) of corporate stock, (iii) in the case of a partnership, partnership
interests (whether general or limited), (iv) in the case of a limited liability
company or similar entity, any membership or similar interests therein and (v)
any other interest or participation that confers on a Person the right to
receive a share of the profits and losses of, or distributions of assets of, the
issuing Person.

          "CASH EQUIVALENTS" means (i) United States dollars, (ii) securities
issued or directly and fully guaranteed or insured by the United States
government or any agency or instrumentality thereof having maturities of not
more than twelve months from the date of acquisition, (iii) certificates of
deposit and eurodollar time deposits with maturities of twelve months or less
from the date of acquisition, bankers' acceptances with maturities not exceeding
twelve months and overnight bank deposits, in each case with any lender party to
any of the Credit Facilities or with any domestic commercial bank having capital
and surplus in excess of $500 million and a Thompson Bank Watch Rating of "B" or
better, (iv) repurchase obligations with a term of not more than seven days for
underlying securities of the types described in clauses (ii) and (iii) above
entered into with any financial institution meeting the qualifications specified
in clause (iii) above, (v) commercial paper having a rating of at least P1 from
Moody's and a rating of at least A1 from S&P, and (vi) investments in money
market or other mutual funds


<PAGE>

                                                                              4

substantially all of whose assets comprise securities of types described in 
clauses (ii) through (v) above.

          "CHANGE OF CONTROL" means the occurrence of any of the following: 

          (i) prior to the first public offering of Voting Stock of the Company,
     either (x) Permitted Holders cease to be the "beneficial owner(s)" (as
     defined in Rules 13d-3 and 13d-5 under the Exchange Act), directly or
     indirectly, of more than 50% of the total voting power of the Voting Stock
     of the Company, or (y) Permitted Holders cease to be entitled by voting
     power, contract or otherwise to elect or cause the election of directors of
     the Company having a majority of the total voting power of the Board of
     Directors, in each case, whether as a result of issuance of securities of
     the Company, any merger, consolidation, liquidation or dissolution of the
     Company, any direct or indirect transfer of securities by any Permitted
     Holder or otherwise (for purposes of this clause (i) and clause (ii) below,
     Permitted Holders shall be deemed to beneficially own any Voting Stock of
     an entity (the "specified entity") held by any other entity (the "parent
     entity") so long as the Permitted Holders beneficially own, directly or
     indirectly, a majority of the Voting Stock of the parent entity;  

          (ii)  following the first public offering of Voting Stock of the
     Company, any "Person"(as such term is used in Sections 13(d) and 14(d) of
     the Exchange Act), other than one or more Permitted Holders, is or becomes
     the beneficial owner (as defined in clause (i) above, except that a Person
     shall be deemed to have "beneficial ownership" of all shares that any such
     Person has the right to acquire within one year), directly or indirectly,
     of more than 50% of the Voting Stock of the Company; PROVIDED that the
     Permitted Holders beneficially own (as defined in clause (i) above),
     directly or indirectly, in the aggregate a lesser percentage of the Voting
     Stock of the Company than such other Person and do not have the right or
     ability by voting power, contract or otherwise to elect or designate for
     election a majority of the Board of Directors; 

          (iii) the sale, lease, transfer, conveyance or other disposition
     (other than by way of merger or consolidation), in one or a series of
     related transactions, of all or substantially all of the assets of the
     Company and its Subsidiaries taken as a whole to any "Person" or group of
     related Persons (a "Group"); (as such term is used in Sections 13(d) and
     14(d) of the Exchange Act);

          (iv) the adoption of a plan relating to the liquidation or dissolution
     of the Company; and

          (v) during any period of two consecutive years, individuals who at the
     beginning of such period constituted the Board of Directors (together with
     any new directors


<PAGE>

                                                                              5

     whose election by such Board of Directors or whose nomination for election
     by the shareholders of the Company was approved by a vote of a majority of
     the directors of the Company then still in office who were either directors
     at the beginning of such period or whose election or nomination for
     election was previously so approved) cease for any reason to constitute a
     majority of the Board of Directors then in office.  

          "COMMISSION" means the Securities and Exchange Commission.

          "CONSOLIDATED CASH FLOW" means, with respect to any Person for any
period, the Consolidated Net Income of such Person and its Restricted
Subsidiaries for such period INCREASED BY (i) an amount equal to any
extraordinary or non-recurring loss, and any net loss realized in connection
with an Asset Sale (together with any related provision for taxes), to the
extent such losses were included in computing such Consolidated Net Income, PLUS
(ii) provision for taxes based on income or profits of such Person and its
Restricted Subsidiaries for such period, to the extent that such provision for
taxes was included in computing such Consolidated Net Income, PLUS (iii)
consolidated interest expense of such Person and its Restricted Subsidiaries for
such period, whether paid or accrued (including, without limitation,
amortization of original issue discount, non-cash interest payments, the
interest component of any deferred payment obligations, the interest component
of all payments associated with Capital Lease Obligations, imputed interest with
respect to Attributable Debt, commissions, discounts and other fees and charges
incurred in respect of letters of credit or bankers' acceptance financings, and
net payments (if any) pursuant to Interest Rate Hedging Agreements), to the
extent that any such expense was included in computing such Consolidated Net
Income, PLUS (iv) depreciation, depletion and amortization expenses (including
amortization of goodwill and other intangibles) for such Person and its
Restricted Subsidiaries for such period to the extent that such depreciation,
depletion and amortization expenses were included in computing such Consolidated
Net Income, PLUS (v) exploration expenses for such Person and its Restricted
Subsidiaries for such period to the extent such exploration expenses were
included in computing such Consolidated Net Income, PLUS (vi) costs incurred in
connection with acquisitions that would be eligible for capitalization treatment
under GAAP, but have been expensed at the time of incurrence, PLUS (vii) other
non-cash charges (excluding any such non-cash charge to the extent that it
represents an accrual of or reserve for cash charges in any future period or
amortization of a prepaid cash expense that was paid in a prior period) of such
Person and its Restricted Subsidiaries for such period, including, without
limitation, any ceiling limitation writedowns and non-cash losses or charges to
net income resulting from the net change in value of such Person's
mark-to-market portfolio of Oil and Gas Commodity Price Risk Management
Contracts, to the extent that


<PAGE>

                                                                              6

such other non-cash charges were included in computing such Consolidated Net 
Income, in each case, on a consolidated basis and determined in accordance 
with GAAP.  Notwithstanding the foregoing, the provision for taxes on the 
income or profits of, and the depreciation, depletion and amortization and 
other non-cash charges and expenses of, a Restricted Subsidiary of the 
relevant Person shall be added to Consolidated Net Income to compute 
Consolidated Cash Flow only to the extent (and in the same proportion) that 
the Net Income of such Restricted Subsidiary was included in calculating the 
Consolidated Net Income of such Person and only if a corresponding amount 
would be permitted at the date of determination to be dividended to such 
Person by such Restricted Subsidiary without prior governmental approval 
(that has not been obtained), and without direct or indirect restriction 
pursuant to the terms of its charter and all agreements, instruments, 
judgments, decrees, orders, statutes, rules and governmental regulations 
applicable to that Restricted Subsidiary or its stockholders.

          "CONSOLIDATED NET INCOME" means, with respect to any Person for any
period, the aggregate of the Net Income of such Person and its Restricted
Subsidiaries for such period, on a consolidated basis, determined in accordance
with GAAP; PROVIDED that (i) the Net Income (but not loss) of any Person that is
not a Restricted Subsidiary or that is accounted for by the equity method of
accounting shall be included only to the extent of the amount of dividends or
distributions paid in cash to the referent Person or a Wholly Owned Restricted
Subsidiary thereof, (ii) the Net Income of any Restricted Subsidiary shall be
excluded to the extent that the declaration or payment of dividends or similar
distributions by that Restricted Subsidiary of that Net Income is not at the
date of determination permitted without any prior governmental approval (that
has not been obtained) or, directly or indirectly, by operation of the terms of
its charter or any agreement, instrument, judgment, decree, order, statute, rule
or governmental regulation applicable to that Restricted Subsidiary or its
stockholders, (iii) the Net Income of any Person acquired in a pooling of
interests transaction for any period prior to the date of such acquisition shall
be excluded and (iv) the cumulative effect of a change in accounting principles
shall be excluded, provided, however, that for purposes of a determination
pursuant to the provisions of Section 4.7 hereof, there shall be deducted from
the Net Income of the Company and its Restricted Subsidiaries for such period an
amount equal to payments, distributions and dividends paid by the Company
pursuant to clause (7) of the second paragraph of Section 4.7.

          "CONSOLIDATED NET WORTH" means the total of the amounts shown on the
balance sheet of the Company and its consolidated Restricted Subsidiaries,
determined on a consolidated basis in accordance with GAAP, as of the end of the
most recent fiscal quarter of the Company ending prior to the taking of any
action for the purpose of which the determination is being made and for which
financial statements are available (but in no event ending more than 135 days
prior to the taking of such action), as (i)


<PAGE>

                                                                              7

the par or stated value of all outstanding Capital Stock of the Company, PLUS 
(ii) paid-in capital or capital surplus relating to such Capital Stock, PLUS 
(iii) any retained earnings or earned surplus, LESS (a) any accumulated 
deficit (in each case excluding any minority interest) and (b) any amounts 
attributable to Disqualified Stock.

          "CORPORATE TRUST OFFICE OF THE TRUSTEE" shall be at the address of the
Trustee specified in Section 12.2  hereof or such other address as to which the
Trustee may give notice to the Company.

          "CREDIT FACILITIES" means, with respect to the Company, one or more
debt facilities (including, without limitation, the Existing Credit Facility) or
commercial paper facilities with banks or other institutional lenders providing
for revolving credit loans, term loans, production payments, receivables
financing (including through the sale of receivables to such lenders or to
special purpose entities formed to borrow from such lenders against such
receivables) or letters of credit, in each case, as amended, restated, modified,
renewed, increased, supplemented, refunded, replaced or refinanced in whole or
in part from time to time.  Indebtedness under Credit Facilities outstanding on
the date on which the Securities are first issued and authenticated under this
Indenture (after giving effect to the use of proceeds thereof) shall be deemed
to have been incurred on such date in reliance on the exception provided by
clause (b) of the definition of Permitted Indebtedness set forth in Section 4.9
hereof.

          "DEFAULT" means any event that is or with the passage of time or the
giving of notice or both would be an Event of Default.

          "DEPOSITARY" means, with respect to the Securities issued in the form
of one or more Global Securities, The Depository Trust Company or another Person
designated as Depositary by the Company, which must be a clearing agency
registered under the Exchange Act.

          "DESIGNATED SENIOR DEBT" means (i) the Existing Credit Facility and
(ii) any other Senior Debt permitted under this Indenture which, at the date of
determination, has an aggregate principal amount outstanding of, or under which,
at the date of determination, the holders thereof are committed to lend up to,
at least $10 million and is specifically designated by the Company in the
instrument evidencing or governing such Senior Debt as "Designated Senior Debt"
for purposes of this Indenture.

          "DISQUALIFIED STOCK" means any Capital Stock that, by its terms (or by
the terms of any security into which it is convertible or for which it is
exchangeable) or upon the happening of any event, matures or is mandatorily
redeemable, pursuant to a sinking fund obligation or otherwise, is


<PAGE>

                                                                              8

convertible or is exchangeable for Indebtedness or Disqualified Stock or 
redeemable at the option of the holder thereof, in whole or in part, in each 
case on or prior to the date that is 91 days after (x) the date on which the 
Securities mature or (y) the date on which there are no Securities 
outstanding.

          "DOLLAR-DENOMINATED PRODUCTION PAYMENTS" means production payment
obligations recorded as liabilities in accordance with GAAP, together with all
undertakings and obligations in connection therewith.

          "EQUITY INTERESTS" means Capital Stock and all warrants, options or
other rights to acquire Capital Stock (but excluding any debt security that is
convertible into, or exchangeable for, Capital Stock).

          "EXCHANGE ACT" means the Securities Exchange Act of 1934, as amended.

          "EXCHANGE SECURITIES" means, if and when issued in exchange for the
Initial Securities as provided in the Exchange and Registration Rights
Agreement, the Company's 10 1/4% Senior Subordinated Notes due 2008.

          "EXISTING CREDIT FACILITY" means that certain Credit Agreement, dated
as of May 14, 1998, among the Company, Bank One, Oklahoma, N.A., as Agent and
lender and the other parties thereto, including any related notes, guarantees,
security or pledge agreements, collateral documents, instruments and agreements
executed by the Company or any Subsidiary of the Company in connection
therewith, and in each case as amended, restated, modified, renewed, increased,
supplemented, refunded, replaced or refinanced, in whole or in part, from time
to time, whether or not with the same or other lenders or agents and whether
provided under the original Existing Credit Facility or any other credit
agreement or indenture.

          "FIXED CHARGES" means, with respect to any Person for any period, the
sum, without duplication, of (i) the consolidated interest expense of such
Person and its Restricted Subsidiaries for such period, whether paid or accrued
(including, without limitation, amortization of original issue discount,
non-cash interest payments, the interest component of any deferred payment
obligations, the interest component of all payments associated with Capital
Lease Obligations, imputed interest with respect to Attributable Debt,
commissions, discounts and other fees and charges incurred in respect of letter
of credit or bankers' acceptance financings, and net payments (if any) pursuant
to Interest Rate Hedging Agreements); (ii) the consolidated interest expense of
such Person and its Restricted Subsidiaries that was capitalized during such
period; (iii) any interest expense on Indebtedness of another Person that is
guaranteed by such Person or any of its Restricted Subsidiaries or secured by a
Lien on assets of such Person or any of its Restricted Subsidiaries (whether or
not such guarantee or Lien is called upon) and (iv)


<PAGE>

                                                                              9

the product of (a) all cash dividend payments (and non-cash dividend payments 
in the case of a Person that is a Restricted Subsidiary, unless paid in 
Equity Interests that are not Disqualified Stock) on any series of preferred 
stock of such Person or any of its Restricted Subsidiaries, times (b) a 
fraction, the numerator of which is one and the denominator of which is one 
minus the then current combined federal, state and local statutory tax rate 
of such Person, expressed as a decimal, in each case, on a consolidated basis 
and in accordance with GAAP.  When calculating the amount of Fixed Charges, 
any interest expense attributable to any Person shall be included in such 
calculation to the same extent the Net Income of such Person was included in 
the calculation of Consolidated Net Income in connection with calculating the 
Fixed Charge Coverage Ratio.

          "FIXED CHARGE COVERAGE RATIO" means with respect to any Person for any
period, the ratio of the Consolidated Cash Flow of such Person for such period
to the Fixed Charges of such Person for such period.  In the event that the
Company or any of its Restricted Subsidiaries incurs, assumes, guarantees or
redeems any Indebtedness (other than revolving credit borrowings) or issues or
redeems preferred stock subsequent to the commencement of the period for which
the Fixed Charge Coverage Ratio is being calculated but prior to the date on
which the calculation of the Fixed Charge Coverage Ratio is made (the
"Calculation Date"), then the Fixed Charge Coverage Ratio shall be calculated
giving pro forma effect to such incurrence, assumption, guarantee or redemption
of Indebtedness, or such issuance or redemption of preferred stock, as if the
same had occurred at the beginning of the applicable four-quarter reference
period.  In addition, for purposes of making the computation referred to above,
(i) acquisitions that have been made by the referent Person or any of its
Restricted Subsidiaries, including through mergers or consolidations and
including any related financing transactions, during the four-quarter reference
period or subsequent to such reference period and on or prior to the Calculation
Date (including, without limitation, any acquisition to occur on the Calculation
Date) shall be deemed to have occurred on the first day of the four-quarter
reference period and any cost savings or expense reductions attributable at the
time of such computation or to be attributable in the future to such
acquisition, shall be included in such computation, to the extent that such
adjustments would be permitted under Article 11 of Regulation S-X and
Consolidated Cash Flow for such reference period shall be calculated without
giving effect to clause (iii) of the proviso set forth in the definition of
Consolidated Net Income, (ii) the net proceeds of Indebtedness incurred or
Disqualified Stock issued by the referent Person pursuant to the first paragraph
of Section 4.9 hereof during the four-quarter reference period or subsequent to
such reference period and on or prior to the Calculation Date shall be deemed to
have been received by the referent Person or any of its Restricted Subsidiaries
on the first day of the four-quarter reference period and applied to its
intended use on such date, (iii) the Consolidated Cash Flow attributable to
discontinued operations, as determined in accordance with GAAP, and operations
or businesses disposed of


<PAGE>

                                                                              10

prior to the Calculation Date, shall be excluded and (iv) the Fixed Charges 
attributable to discontinued operations, as determined in accordance with 
GAAP, and operations or businesses disposed of prior to the Calculation Date, 
shall be excluded, but only to the extent that the obligations giving rise to 
such Fixed Charges shall not be obligations of the referent Person or any of 
its Restricted Subsidiaries following the Calculation Date.

          "GAAP" means generally accepted accounting principles set forth in the
opinions and pronouncements of the Accounting Principles Board of the American
Institute of Certified Public Accountants and statements and pronouncements of
the Financial Accounting Standards Board or in such other statements by such
other entity as have been approved by a significant segment of the accounting
profession which are in effect on the date hereof.

          "GOVERNMENT SECURITIES" means securities that are (a) direct
obligations of the United States of America for the timely payment of which its
full faith and credit is pledged or (b) obligations of a Person controlled or
supervised by and acting as an agency or instrumentality of the United States of
America the timely payment of which is unconditionally guaranteed as a full
faith and credit obligation by the United States of America, which, in either
case, are not callable or redeemable at the option of the issuer thereof, and
shall also include a depository receipt issued by a bank (as defined in Section
3(a)(2) of the Securities Act), as custodian with respect to any such Government
Security or a specific payment of principal of or interest on any such
Government Security held by such custodian for the account of the holder of such
depository receipt; PROVIDED, that (except as required by law) such custodian is
not authorized to make any deduction from the amount payable to the holder of
such depository receipt from any amount received by the custodian in respect of
the Government Security or the specific payment of principal of or interest on
the Government Security evidenced by such depository receipt.

          "GUARANTEE" means a guarantee (other than by endorsement of negotiable
instruments for collection in the ordinary course of business), direct or
indirect, in any manner (including, without limitation, letters of credit and
reimbursement agreements in respect thereof), of all or any part of any
Indebtedness.

          "HOLDER" means a Person in whose name a Security is registered on the
Registrar's books.

          "INDEBTEDNESS" means, with respect to any Person, without duplication,
(a) any indebtedness of such Person, whether or not contingent, (i) in respect
of borrowed money, (ii) evidenced by bonds, notes, debentures or similar
instruments, (iii) evidenced by letters of credit (or reimbursement agreements
in respect thereof) or banker's acceptances, (iv) representing Capital Lease
Obligations, (v) representing the balance deferred and unpaid of the purchase
price of any property, except any such 


<PAGE>

                                                                              11


balance that constitutes an accrued expense or trade payable, (vi) 
representing any obligations in respect of Interest Rate Hedging Agreements 
or Oil and Gas Hedging Contracts, and (vii) in respect of any Production 
Payment, (b) all indebtedness of others secured by a Lien on any asset of 
such Person (whether or not such indebtedness is assumed by such Person), 
(c) obligations of such Person in respect of production imbalances, 
(d) Acquired Debt of such Person, (e) Attributable Debt of such Person, and 
(f) to the extent not otherwise included in the foregoing, the guarantee by 
such Person of any Indebtedness of any other Person.

          The amount of Indebtedness of any Person at any date shall be the 
outstanding balance at such date of all unconditional obligations as 
described above and the maximum liability, on the occurrence of the 
contingency giving rise to the obligation, of any contingent obligations 
described above.  The amount of indebtedness at any date in respect of 
(i) Credit Facilities shall be the outstanding principal amount thereof at 
such date plus any outstanding letters of credit (or reimbursement 
obligations in respect thereof) issued thereunder at such date and 
(ii) Interest Rate Hedging Agreements or Oil and Gas Hedging Contracts at 
such date shall be an amount equal to the net termination value of such 
agreement or arrangement giving rise to such obligation that would be payable 
at such time.

          "INDENTURE" means this Indenture, as amended or supplemented from 
time to time.

          "INITIAL PURCHASER" means Chase Securities Inc. as initial 
purchaser of the Notes.

          "INSTITUTIONAL ACCREDITED INVESTORS" means an institutional 
"accredited investor" within the meaning of Rules 501(a)(1), (2), (3) or (7) 
under the Securities Act.

          "INTEREST RATE HEDGING AGREEMENTS" means, with respect to any 
Person, the obligations of such Person under (i) interest rate swap 
agreements, interest rate cap agreements and interest rate collar agreements 
and (ii) other agreements or arrangements designed to protect such Person 
against fluctuations in interest rates.

          "INVESTMENTS" means, with respect to any Person, all investments by 
such Person in other Persons (including Affiliates) in the forms of direct or 
indirect loans (including guarantees of Indebtedness or other obligations, 
but excluding trade credit and other ordinary course advances customarily 
made in the Oil and Gas Business) advances (excluding commission, travel and 
similar advances to officers and employees made in the ordinary course of 
business), capital contributions, purchases or other acquisitions for 
consideration of Indebtedness, Equity Interests or other securities, together 
with all items that are or would be classified as investments on a balance 
sheet prepared in accordance with GAAP; PROVIDED that the following shall not 
constitute Investments: (i) an acquisition of assets, Equity 

<PAGE>

                                                                              12


Interests or other securities by the Company for consideration consisting of 
common equity securities of the Company, (ii) Interest Rate Hedging 
Agreements entered into in compliance with the covenant set forth in clause (g) 
of the second paragraph of Section 4.9, (iii) Oil and Gas Hedging Agreements 
entered into in compliance with the covenant set forth in clause (h) of the 
second paragraph of Section 4.9, (iv) endorsements of negotiable instruments 
and documents in the ordinary course of business, (v) extensions of trade 
credit on commercially reasonable terms in accordance with normal trade 
practices, and (vi) Cash Equivalents, bonds, notes, debentures or other 
securities received in accordance with the limitations set forth in Section 
4.10.  If the Company or any Restricted Subsidiary of the Company sells or 
otherwise disposes of any Equity Interests of any direct or indirect 
Restricted Subsidiary of the Company such that, after giving effect to any 
such sale or disposition, such entity is no longer a Subsidiary of the 
Company, the Company shall be deemed to have made an Investment on the date 
of any such sale or disposition equal to the fair market value of the Equity 
Interests of such Subsidiary not sold or disposed of.

          "ISSUE DATE" means the date on which the Initial Securities are 
originally issued.

          "LEGAL HOLIDAY" means a Saturday, a Sunday or a day on which 
banking institutions in The City of New York or at a place of payment are 
authorized by law, regulation or executive order to remain closed.  If a 
payment date is a Legal Holiday at a place of payment, payment may be made at 
that place on the next succeeding day that is not a Legal Holiday, and no 
interest shall accrue for the intervening period.

          "LIEN" means, with respect to any asset, any mortgage, lien, 
pledge, charge, security interest or encumbrance of any kind in respect of 
such asset, whether or not filed, recorded or otherwise perfected under 
applicable law (including any conditional sale or other title retention 
agreement, any lease in the nature thereof, any option or other agreement to 
sell or give a security interest in and any filing of or agreement to give 
any financing statement under the Uniform Commercial Code (or equivalent 
statutes) of any jurisdiction).

          "MOODY'S" means Moody's Investors Service, Inc. and its successors.

          "NET INCOME" means, with respect to any Person, the net income 
(loss) of such Person, determined in accordance with GAAP and before any 
reduction in respect of preferred stock dividends, excluding, however, (i) any 
gain or loss, together with any related provision for taxes on such gain or 
loss, realized in connection with (a) any Asset Sale (including, without 
limitation, dispositions pursuant to sale and leaseback transactions) or 
(b) the disposition of any securities by such Person or any of its Restricted 
Subsidiaries or the extinguishment of any Indebtedness of such Person or any 
of its 

<PAGE>

                                                                              13


Restricted Subsidiaries and (ii) any extraordinary or nonrecurring gain or 
loss, together with any related provision for taxes on such extraordinary or 
nonrecurring gain or loss.

          "NET PROCEEDS" means the aggregate cash proceeds received by the 
Company or any of its Restricted Subsidiaries in respect of any Asset Sale 
(including, without limitation, any cash received upon the sale or other 
disposition of any non-cash consideration received in any Asset Sale, but 
excluding cash amounts placed in escrow, until such amounts are released to 
the Company), net of the direct costs relating to such Asset Sale (including, 
without limitation, legal, accounting, investment banking and other 
professional fees and expenses, and sales commissions) and any relocation 
expenses incurred as a result thereof, taxes paid or payable as a result 
thereof (after taking into account any available tax credits or deductions 
and any tax sharing arrangements), amounts required to be applied to the 
repayment of Indebtedness (other than Indebtedness under any Senior Debt) 
secured by a Lien on the asset or assets that were the subject of such Asset 
Sale and any reserve for adjustment in respect of the sale price of such 
asset or assets established in accordance with GAAP and any reserve 
established for future liabilities.

          "NON-RECOURSE DEBT" means Indebtedness (i) as to which neither the 
Company nor any of its Restricted Subsidiaries (a) provides any guarantee or 
credit support of any kind (including any undertaking, guarantee, indemnity 
or agreement or instrument that would constitute Indebtedness) or (b) is 
directly or indirectly liable (as a guarantor or otherwise); (ii) no default 
with respect to which (including any rights that the holders thereof may have 
to take enforcement action against an Unrestricted Subsidiary) would permit 
(upon notice, lapse of time, or both) any holder of any other Indebtedness of 
the Company or any of its Restricted Subsidiaries to declare a default on 
such other Indebtedness or cause the payment thereof to be accelerated or 
payable prior to its stated maturity; and (iii) the explicit terms of which 
provide that there is no recourse against any of the assets of the Company or 
its Restricted Subsidiaries.

          "NOTE CUSTODIAN" means the Trustee or the Registrar, as custodian 
with respect to the Securities in global form, or any successor entity 
thereto or any entity acting as custodian with respect to Securities in 
global form.

          "OBLIGATIONS" means any principal, interest, penalties, fees, 
indemnifications, reimbursements, damages and other liabilities payable under 
the documentation governing any Indebtedness.

          "OFFERING" means the offering of the Securities by the Company.

          "OFFICER" means, with respect to any Person, the 

<PAGE>

                                                                              14


Chairman of the Board, the Chief Executive Officer, the President, the Chief 
Operating Officer, the Chief Financial Officer, the Treasurer, any Assistant 
Treasurer, the Controller, the Secretary, the Assistant Secretary or any 
Vice-President of such Person.

          "OFFICERS' CERTIFICATE" means a certificate signed on behalf of the 
Company, by two Officers of the Company, one of whom must be the principal 
executive officer, the principal financial officer, the treasurer or the 
principal accounting officer of the Company, that meets the requirements of 
Section 12.5 hereof.

          "OIL AND GAS BUSINESS" means (i) the acquisition, exploration, 
exploitation, development, operation and disposition of interests in oil, gas 
and other hydrocarbon properties, (ii) the gathering, marketing, 
distribution, treating, processing, storage, selling and transporting of any 
production from such interests or properties of the Company and its 
subsidiaries and the marketing of oil and gas obtained from unrelated 
Persons, (iii) any business relating to exploration for or development, 
production, treatment, processing, storage, transportation, gathering or 
marketing of oil, gas and other minerals and products produced in association 
therewith, (iv) any business relating to oilfield sales and service and (v) any 
activity that is ancillary to or necessary or appropriate for the activities 
described in clauses (i) through (iv) of this definition.

          "OIL AND GAS HEDGING CONTRACTS" means any oil and gas purchase or 
commodity price risk management hedging agreement, and other agreement or 
arrangement, entered into in the ordinary course of business, in each case, 
that is designed to provide protection against oil and gas price fluctuations.

          "OPINION OF COUNSEL" means an opinion from legal counsel who is 
reasonably acceptable to the Trustee, that meets the requirements of 
Section 12.5 hereof.  The counsel may be an employee of or counsel to the 
Company, any Subsidiary Guarantor or the Trustee.

          "PARI PASSU INDEBTEDNESS" means indebtedness which ranks PARI PASSU 
in right of payment to the Securities.

          "PERMITTED HOLDERS" means (i) any stockholder of the Company on the 
Issue Date; (ii) family members or relatives of the persons described in 
clause (i); (iii) any trusts created for the benefit of the persons described 
in clauses (i) or (ii); (iv) in the event of the incompetence or death of any 
of the persons described in clauses (i) or (ii), such person's estate, 
executor, administrator, committee or other personal representatives or 
beneficiaries; and (v) any Permitted Holder Subsidiary.

          "PERMITTED HOLDER SUBSIDIARY" means, with respect to any Permitted 
Holder, (i) any corporation more than 50% of the 

<PAGE>

                                                                              15


outstanding voting stock of which is owned, directly or indirectly, by one or 
more Permitted Holders, or by one or more other Permitted Holder Subsidiaries 
of such Permitted Holders,or by one or more Permitted Holders and one or more 
other Permitted Holder Subsidiaries of such Permitted Holders, (ii) any 
general partnership, limited liability company, joint venture or similar 
entity more than 50% of the outstanding partnership, membership or similar 
interest of which is owned directly or indirectly, by one or more Permitted 
Holders, or by one or more other Permitted Holder Subsidiaries of such 
Permitted Holders, or by one or more Permitted Holders and one or more other 
Permitted Holder Subsidiaries of such Permitted Holders and (iii) any limited 
partnership of which one or more Permitted Holders or any Permitted Holder 
Subsidiary of such Permitted Holders is a general partner.

          "PERMITTED INDEBTEDNESS" has the meaning given in the covenant 
described in Section 4.9.

          "PERMITTED INVESTMENTS" means (a) any Investment in the Company or 
in a Restricted Subsidiary of the Company; (b) any Investment in Cash 
Equivalents; (c) any Investment by the Company or any Restricted Subsidiary 
of the Company in a Person if, as a result of such Investment and any related 
transactions that at the time of such Investment are contractually mandated 
to occur, (i) such Person becomes a Restricted Subsidiary of the Company or 
(ii) such Person is merged, consolidated or amalgamated with or into, or 
transfers or conveys all or substantially all of its assets to, or is 
liquidated into, the Company or a Restricted Subsidiary of the Company; (d) any 
Investment made as a result of the receipt of non-cash portion of the Cash 
Consideration from an Asset Sale that was made pursuant to and in compliance 
with Section 4.10 hereof or not constituting an Asset Sale by reason of the 
$5 million threshold contained in the definition thereof; (e) any Investment 
by the Company in any Person engaged in the Oil and Gas Business or assets 
used in the Oil and Gas Business in exchange for Equity Interests in the 
Company (other than Disqualified Stock); (f) shares of Capital Stock received 
in connection with any good faith settlement of a bankruptcy proceeding 
involving a trade creditor; (g) Interest Rate Hedging Agreements or Oil and 
Gas Hedging Contracts; (h) loans and advances to employees in the ordinary 
course of business for bona fide business purposes; (i) operating agreements, 
joint ventures, partnership agreements, working interests, royalty interests, 
mineral leases, processing agreements, farm-out or farm-in agreements, 
contracts for the sale, transportation or exchange of oil and natural gas, 
unitization agreements, pooling arrangements, area of mutual interest 
agreements, production sharing agreements or other similar or customary 
agreements, transactions, properties, interests or arrangements, and 
Investments and expenditures in connection therewith or pursuant thereto, in 
each case made or entered into in the ordinary course of the Oil and Gas 
Business, excluding however, Investments in corporations other than any 
Investment received pursuant to the provisions set forth in Section 4.10; and 
(j) any other Investments in any Person or Persons not otherwise permitted to 

<PAGE>

                                                                              16


be made pursuant to clauses (a)-(i) above, when taken together with all other 
Investments made pursuant to this clause (j) that are at the time 
outstanding, having an aggregate amount (such amount to be calculated on a 
cost basis) not to exceed the greater of (i) $15 million and (ii) 5% of Total 
Assets, as calculated at the time of such Investment.

          "PERMITTED LIENS" means (i) Liens securing Indebtedness of a 
Subsidiary or Liens securing Senior Debt that is outstanding on the date of 
issuance of the Securities and Liens securing Senior Debt that is permitted 
by the terms of this Indenture to be incurred; (ii) Liens in favor of the 
Company or any Restricted Subsidiary; (iii) Liens on property existing at the 
time of acquisition thereof by the Company or any Subsidiary of the Company 
and Liens on property or assets of a Subsidiary existing at the time it 
became a Subsidiary, PROVIDED that such Lien was not created in contemplation 
of the acquisition of the property and provided further that no such Lien 
shall extend to any assets other than the acquired property or the property 
of the acquired Subsidiary; (iv) Liens incurred on deposits made in the 
ordinary course of business in connection with workers' compensation, 
unemployment insurance or other kinds of social security, or to secure the 
payment or performance of tenders, statutory or regulatory obligations, 
surety or appeal bonds, performance bonds or other obligations of a like 
nature incurred in the ordinary course of business (including lessee or 
operator obligations under statutes, governmental regulations or instruments 
related to the ownership, exploration and production of oil, gas and minerals 
on state or federal lands or waters); (v) Liens existing on the date of this 
Indenture; (vi) Liens for taxes, assessments or governmental charges or 
claims that are not yet delinquent or that are being contested in good faith 
by appropriate proceedings promptly instituted and diligently concluded, 
PROVIDED that any reserve or other appropriate provision as shall be required 
in conformity with GAAP shall have been made therefor; (vii) statutory liens 
of landlords, mechanics, suppliers, vendors, warehousemen, carriers or other 
like Liens arising in the ordinary course of business; (viii) judgment Liens 
not giving rise to an Event of Default so long as any appropriate legal 
proceeding that may have been duly initiated for the review of such judgment 
shall not have been finally terminated or the period within which such 
proceeding may be initiated shall not have expired; (ix) Liens on, or related 
to, properties or assets to secure all or part of the costs incurred in the 
ordinary course of the Oil and Gas Business for the exploration, 
exploitation, drilling, development, production, gathering, processing, 
transportation, marketing, storage or operation thereof; (x) Liens on 
pipeline or pipeline facilities that arise under operation of law; (xi) Liens 
arising under operating agreements, joint venture agreements, partnership 
agreements, oil and gas leases, farm-out or farm-in agreements, division 
orders, contracts for the sale, transportation or exchange of oil or natural 
gas, unitization and pooling declarations and agreements, area of mutual 
interest agreements and other agreements that are customary in the Oil and 
Gas Business; (xii) Liens reserved in 

<PAGE>

                                                                              17


oil and gas mineral leases for bonus or rental payments and for compliance 
with the terms of such leases, (xiii) Liens securing the Securities, 
(xiv) Liens constituting survey exceptions, encumbrances, easements, and 
reservations of, and rights to others for, rights-of-way, zoning and other 
restrictions as to the use of real properties, and minor defects of title 
which, in the case of any of the foregoing, do not secure the payment of 
borrowed money, and in the aggregate do not materially adversely affect the 
value of the assets of the Company and its Restricted Subsidiaries, taken as 
a whole, or materially impair the use of such properties for the purposes for 
which such properties are held by the Company or such Subsidiaries, (xv) any 
interest or title of a lessor under any Capital Lease Obligation or operating 
lease, (xvi) Liens resulting from the deposit of funds or evidences of 
Indebtedness in trust for the purpose of defeasing Indebtedness of the 
Company or any of the Restricted Subsidiaries, (xvii) Liens securing 
obligations under Interest Rate Hedging Agreements or Oil and Gas Commodity 
Price Risk Management Contracts, (xviii) Liens upon specific items of 
inventory or other goods and proceeds of the Company or any Restricted 
Subsidiary securing the Company's or such Restricted Subsidiary's, as the 
case may be, obligations in respect of bankers' acceptances issued or created 
for the account of the Company or such Restricted Subsidiary, as the case may 
be, to facilitate the purchase, shipment or storage of such inventory or 
other goods, (xix) Liens securing reimbursement obligations with respect to 
commercial letters of credit which encumber documents and other property 
relating to such letters of credit and products and proceeds thereof, 
(xx) Liens encumbering property or assets under construction arising from 
progress or partial payments by a customer of the Company or its Restricted 
Subsidiaries relating to such property or assets, (xxi) Liens encumbering 
deposits made to secure Obligations arising from statutory, regulatory, 
contractual or warranty requirements of the Company or any of its Restricted 
Subsidiaries, including rights of offset and set-off, (xxii) Liens securing 
Purchase Money Debt; provided however that the related Purchase Money Debt 
shall not be secure by any property or assets of the Company or any 
Restricted Subsidiary other than the property and assets acquired by the 
Company with the proceeds of such Purchase Money Debt, (xxiii) Liens on the 
Capital Stock of Unrestricted Subsidiaries, (xxiv) Liens to secure any 
Permitted Refinancing Debt, provided that the Indebtedness so exchanged, 
extended, refinanced, renewed, replaced, defeased or refunded was secured by 
Liens permitted pursuant to clause (iii) or (iv) of this definition, provided 
however, that (a) such new Liens shall be limited to all or part of the same 
property that secured the original Lien, plus improvements on the property 
and (b) the Permitted Refinancing Debt secured by such Lien at such time is 
not increased to any amount greater than the sum of (x) the outstanding 
principal amount or, if greater, the committed amount of the Indebtedness 
secured by Liens described under clause (iii) or (iv) of this definition at 
the time the original Lien became a Lien permitted in accordance with this 
Indenture and (y) an amount necessary to pay any fees and expenses, including 
premiums, related to such exchange, extension, refinancing, 

<PAGE>

                                                                              18


renewal, replacement, defeasement or refunding, (xxv) Liens securing 
Attributable Indebtedness under any sale and leaseback transaction permitted 
by the terms of this Indenture, but only on the property subject to such sale 
and leaseback transaction; and (xxvi) Liens not otherwise permitted by 
clauses (i) through (xxv) that are incurred in the ordinary course of 
business of the Company or any Subsidiary with respect to obligations that do 
not exceed $5 million at any one time outstanding.

          "PERMITTED REFINANCING DEBT" means any Indebtedness of the Company 
or any of its Restricted Subsidiaries issued in exchange for, or the net 
proceeds of which are used to extend, refinance, renew, replace, defease or 
refund other Indebtedness (other than Indebtedness incurred under a Credit 
Facility) of the Company or any of its Restricted Subsidiaries; PROVIDED 
that: (i) the principal amount of such Permitted Refinancing Debt does not 
exceed the principal amount of the Indebtedness so extended, refinanced, 
renewed, replaced, defeased or refunded (plus the amount of reasonable 
expenses incurred in connection therewith (other than increases resulting 
from the capitalization of interest or fees)); (ii) such Permitted 
Refinancing Debt has a final maturity date on or later than the final 
maturity date of, and has a Weighted Average Life to Maturity equal to or 
greater than the Weighted Average Life to Maturity of, the Indebtedness being 
extended, refinanced, renewed, replaced, defeased or refunded; (iii) if the 
Indebtedness being extended, refinanced, renewed, replaced, defeased or 
refunded is subordinated in right of payment to the Securities or the 
Subsidiary Guarantees, as the case may be, such Permitted Refinancing Debt 
has a final maturity date later than the final maturity date of, and is 
subordinated in right of payment to, the Securities or the Subsidiary 
Guarantees, as the case may be, on terms at least as favorable taken as a 
whole to the Holders of the Securities as those contained in the 
documentation governing the Indebtedness being extended, refinanced, renewed, 
replaced, defeased or refunded; and (iv) such Indebtedness is incurred either 
by the Company or by the Restricted Subsidiary who is the obligor on the 
Indebtedness being extended, refinanced, renewed, replaced, defeased or 
refunded.

          "PERSON" means any individual, corporation, partnership, joint 
venture, association, joint-stock company, trust, unincorporated 
organization, government or any agency or political subdivision thereof or 
any other entity.

          "PRIVATE EXCHANGE SECURITIES" shall have the meaning set forth in 
the Registration Rights Agreement.

          "PRODUCTION PAYMENTS" means Dollar-Denominated Production Payments 
and Volumetric Production Payments, collectively.

          "PURCHASE AGREEMENT" means the Purchase Agreement, dated July 21, 
1998, between the Company and the Initial Purchaser relating to the Offering.

<PAGE>

                                                                              19


          "PURCHASE MONEY DEBT" means Indebtedness incurred in connection 
with the purchase by the Company or any of its Subsidiaries of any equipment, 
real or personal property, or any other asset, other than Equity Interests of 
any Person (i) as to which the obligee expressly waives the provisions of 
Section 1111 (b) of Title 11, United States Code; (ii) as to which neither 
the Company nor any of its Restricted Subsidiaries (a) provides any guarantee 
or credit support of any kind (including any undertaking, guarantee, 
indemnity, agreement or instrument that would constitute Indebtedness), or 
(b) is directly or indirectly liable (as guarantor or otherwise) other than 
the pledge of the equipment, real or personal property or other assets 
acquired with the proceeds of such Indebtedness; (iii) no default with 
respect to which (including any rights that the holders thereof may have to 
take enforcement actions against an Unrestricted Subsidiary) would permit 
(upon notice, lapse of time, or both) any holder of any other Indebtedness of 
the Company or any of its Restricted Subsidiaries to declare a default on 
such other indebtedness or cause the payment thereof to be accelerated or 
payable prior to its stated maturity; and (iv) the explicit terms of which 
provide that there is no recourse against any of the assets of the Company or 
its Restricted Subsidiaries, other than recourse against the equipment, real 
or personal property or other assets acquired with the proceeds of such 
Indebtedness.

          "QIB" means any "qualified institutional buyer" (as defined in 
Rule 144A under the Securities Act").

          "REGISTERED EXCHANGE OFFER" means the offer to exchange the Initial 
Securities for the Exchange Securities issued under a registration statement 
filed pursuant to the terms of the Registration Rights Agreement.

          "REGISTRATION RIGHTS AGREEMENT" means the Exchange and Registration 
Rights Agreement, dated July 24, 1998, among the Company and the Initial 
Purchaser.

          "RESPONSIBLE OFFICER" when used with respect to the Trustee, means 
any officer within the Corporate Trust Administration of the Trustee (or any 
successor group of the Trustee) and also means, with respect to a particular 
corporate trust matter, any other officer to whom such matter is referred 
because of his knowledge of and familiarity with the particular subject.

          "RESTRICTED INVESTMENT" means an Investment other than a Permitted 
Investment.

          "RESTRICTED PERIOD" means the 40 consecutive days beginning on and 
including the later of (A) the day on which the Initial Securities are 
offered to persons other than distributors (as defined in Regulation S under 
the Securities Act) and (B) the Issue Date.

<PAGE>

                                                                              20


          "RESTRICTED SECURITIES LEGEND" means the Private Placement Legend 
set forth in clause (A) of Section 2.1(c) or the Regulation S Legend set 
forth in clause (B) of Section 2.1(c), as applicable.

          "RESTRICTED SUBSIDIARY" means any direct or indirect Subsidiary of 
the Company that is not an Unrestricted Subsidiary.

          "S&P" means Standard & Poor's Ratings Group and its successors.

          "SECURITIES" means the securities issued under this Indenture.

          "SECURITIES ACT" means the Securities Act of 1933, as amended.

          "SHELF REGISTRATION STATEMENT" has the meaning ascribed to such 
term in the Registration Rights Agreement.

          "SUBORDINATED INDEBTEDNESS" means any Indebtedness of the Company 
or any Restricted Subsidiary (whether outstanding on the Issue Date or 
thereafter incurred) which is subordinate or junior in right of payment to 
the Securities pursuant to a written agreement.

          "SUBSIDIARY" means, with respect to any Person, (i) any 
corporation, association or other business entity of which more than 50% of 
the total voting power of shares of Capital Stock entitled (without regard to 
the occurrence of any contingency) to vote in the election of directors, 
managers or trustees thereof is at the time owned or controlled, directly or 
indirectly, by such Person or one or more of the other Subsidiaries of that 
Person (or a combination thereof) and (ii) any partnership (a) the sole 
general partner or the managing general partner of which is such Person or a 
Subsidiary of such Person or (b) the only general partners of which are such 
Person or of one or more Subsidiaries of such Person (or any combination 
thereof).

          "SUBSIDIARY GUARANTEE" means any Guarantee of payment of the 
Securities by a Subsidiary Guarantor pursuant to the terms of this Indenture, 
and, collectively, all such Guarantees.  Each such Subsidiary Guarantee by 
any Restricted Subsidiary acquired or created by the Company or any of its 
Restricted Subsidiaries after the date of this Indenture shall be in 
substantially the form set forth in Exhibit C to this Indenture or in such 
other form as shall be acceptable to the Trustee.

          "SUBSIDIARY GUARANTORS" means each Restricted Subsidiary of the 
Company existing on the date of this Indenture (such Subsidiaries being 
Continental Gas, Inc. and Continental Crude Co.), and any future Restricted 
Subsidiary of the Company that incurs a Subsidiary Guarantee in accordance 
with the provisions of this Indenture, and, in each case, their respective 

<PAGE>
                                                                              21

successors and assigns.

          "TIA" means the Trust Indenture Act of 1939 (15 U.S.C. Sections
 77aaa-77bbbb) as in effect on the date on which this Indenture is qualified
under the TIA.

          "TOTAL ASSETS" means, with respect to any Person, the total
consolidated assets of such Person and its Restricted Subsidiaries, as shown on
the most recent balance sheet of such Person.

          "TREASURY RATE" means the yield to maturity at the time of computation
of United States Treasury securities with a constant maturity (as compiled and
published in the most recent Federal Reserve Statistical Release H.15(519) which
has become publicly available at least two Business Days prior to the redemption
date (or, if such Statistical Release is no longer published, any publicly
available source or similar market data)) most nearly equal to the period from
the redemption date to August 1, 2003; PROVIDED that if the period from the
redemption date to August 1, 2003 is not equal to the constant maturity of a
United States Treasury security for which a weekly average yield is given, the
Treasury Rate shall be obtained by linear interpolation (calculated to the
nearest one-twelfth of a year) from the weekly average yields of United States
Treasury securities for which such yields are given, except that if the period
from the redemption date to August 1, 2003 is less than one year, the weekly
average yield on actually traded United States Treasury securities adjusted to a
constant maturity of one year shall be used.

          "TRUSTEE" means the party named as such in the preamble to this
Indenture until a successor replaces it in accordance with the applicable
provisions of this Indenture and thereafter means the successor serving
hereunder.

          "UNRESTRICTED SUBSIDIARY" means (i) any Subsidiary of the Company
which at the time of determination shall be an Unrestricted Subsidiary (as
designated by the Board of Directors of the Company, as provided below) and (ii)
any Subsidiary of an Unrestricted Subsidiary.  The Board of Directors of the
Company may designate any Subsidiary of the Company (including any newly
acquired or newly formed Subsidiary or a Person becoming a Subsidiary through
merger or consolidation or Investment therein) to be an Unrestricted Subsidiary
only if:  (a) such Subsidiary does not own any Capital Stock of, or own or hold
any Lien on any property of, any other Subsidiary of the Company which is not a
Subsidiary of the Subsidiary to be so designated or otherwise an Unrestricted
Subsidiary; (b) all the Indebtedness of such Subsidiary shall at the date of
designation, and will at all times thereafter consist of, Non-Recourse Debt; (c)
the Company certifies that such designation was permitted by Section 4.7;
(d) such Subsidiary, either alone or in the aggregate with all other
Unrestricted Subsidiaries, does not operate, directly or indirectly, all or
substantially all of the business of the


<PAGE>

                                                                              22

Company and its Subsidiaries; (e) such Subsidiary does not, directly or 
indirectly, own any Indebtedness of or Equity Interest in, and has no 
Investments in, the Company or any Restricted Subsidiary; (f) such Subsidiary 
is a Person with respect to which neither the Company nor any of its 
Restricted Subsidiaries has any direct or indirect obligation to maintain or 
preserve such Person's financial condition or to cause such Person to achieve 
any specified levels of operating results; and (g) on the date such 
Subsidiary is designated an Unrestricted Subsidiary, such Subsidiary is not a 
party to any agreement, contract, arrangement or understanding with the 
Company or any Restricted Subsidiary with terms substantially less favorable 
to the Company or such Restricted Subsidiary than those that might have been 
obtained from Persons who are not Affiliates of the Company.  Any such 
designation by the Board of Directors of the Company shall be evidenced to 
the Trustee by filing with the Trustee a resolution of the Board of Directors 
of the Company giving effect to such designation and an Officer's Certificate 
certifying that such designation complied with the foregoing conditions.  If, 
at any time, any Unrestricted Subsidiary would fail to meet the foregoing 
requirements as an Unrestricted Subsidiary, it shall thereafter cease to be 
an Unrestricted Subsidiary for purposes of this Indenture and any 
Indebtedness of such Subsidiary shall be deemed to be incurred as of such 
date.  The Board of Directors of the Company may designate any Unrestricted 
Subsidiary to be a Restricted Subsidiary; PROVIDED, that (1) immediately 
after giving effect to such designation, no Default or Event of Default shall 
have occurred and be continuing or would occur as a consequence thereof and 
the Company could incur at least $1.00 of additional Indebtedness (excluding 
Permitted Indebtedness) pursuant to Section 4.9 on a pro forma basis taking 
into account such designation and (2) such Subsidiary executes a Subsidiary 
Guarantee pursuant to Section 11.4 of this Indenture.

          "VOLUMETRIC PRODUCTION PAYMENTS" means production payment obligations
recorded as deferred revenue in accordance with GAAP, together with all
undertakings and obligations in connection therewith.

          "VOTING STOCK" of an entity means all classes of Capital Stock of such
entity then outstanding and normally entitled to vote in the election of
directors or all interests in such entity with the ability to control the
management or actions of such entity.

          "WEIGHTED AVERAGE LIFE TO MATURITY" means, when applied to any
Indebtedness at any date, the number of years obtained by dividing (i) the sum
of the products obtained by multiplying (a) the amount of each then remaining
installment, sinking fund, serial maturity or other required payments of
principal, including payment at final maturity, in respect thereof, by (b) the
number of years (calculated to the nearest one-twelfth) that will elapse between
such date and the making of such payment, by (ii) the then outstanding principal
amount of such


<PAGE>

                                                                              23

Indebtedness.

          "WHOLLY OWNED RESTRICTED SUBSIDIARY" of any Person means a Restricted
Subsidiary of such Person all of the outstanding Capital Stock or other
ownership interests of which (other than directors' qualifying shares) shall at
the time be owned, directly or indirectly, by such Person or by one or more
Wholly Owned Restricted Subsidiaries of such Person.


     Section 1.2.  OTHER DEFINITIONS.
<TABLE>
<CAPTION>

                                                                              Defined in
                                     Term                                      Section
               <S>                                                               <C>
               "Affiliate Transaction" . . . . . . . . . . . . . . . . . .        4.11
               "Asset Sale Offer". . . . . . . . . . . . . . . . . . . . .        3.9
               "Bankruptcy Law". . . . . . . . . . . . . . . . . . . . . .       10.2
               "Cash Consideration". . . . . . . . . . . . . . . . . . . .        4.10
               "Change of Control Offer" . . . . . . . . . . . . . . . . .        4.13
               "Change of Control Payment" . . . . . . . . . . . . . . . .        4.13
               "Change of Control Payment Date". . . . . . . . . . . . . .        4.13
               "Change of Control Redemption Payment". . . . . . . . . . .        3.7
               "Common Stock". . . . . . . . . . . . . . . . . . . . . . .        3.7
               "Covenant Defeasance" . . . . . . . . . . . . . . . . . . .        8.3
               "Custodian" . . . . . . . . . . . . . . . . . . . . . . . .        6.1
               "DTC" . . . . . . . . . . . . . . . . . . . . . . . . . . .        2.3
               "Definitive Securities" . . . . . . . . . . . . . . . . . .        2.1
               "Event of Default". . . . . . . . . . . . . . . . . . . . .        6.1
               "Excess Proceeds" . . . . . . . . . . . . . . . . . . . . .        4.10
               "Exchange Global Note". . . . . . . . . . . . . . . . . . .        2.1
               "Global Securities" . . . . . . . . . . . . . . . . . . . .        2.1
               "Guarantor Senior Debt. . . . . . . . . . . . . . . . . . .       10.2
               "incur" . . . . . . . . . . . . . . . . . . . . . . . . . .        4.9
               "Institutional Accredited Investor                               
                  Global Note" . . . . . . . . . . . . . . . . . . . . . .        2.1
               "Institutional Accredited Investor Note". . . . . . . . . .        2.1
               "Legal Defeasance". . . . . . . . . . . . . . . . . . . . .        8.2
               "Notice of Default" . . . . . . . . . . . . . . . . . . . .        6.1
               "Offer Amount". . . . . . . . . . . . . . . . . . . . . . .        3.9
               "Offer Period". . . . . . . . . . . . . . . . . . . . . . .        3.9
               "Paying Agent". . . . . . . . . . . . . . . . . . . . . . .        2.3
               "Payment Blockage Notice" . . . . . . . . . . . . . . . . .       10.4
               "Payment Default" . . . . . . . . . . . . . . . . . . . . .        6.1
               "Permitted Indebtedness". . . . . . . . . . . . . . . . . .        4.9
               "Private Placement Legend". . . . . . . . . . . . . . . . .        2.1
               "Purchase Date" . . . . . . . . . . . . . . . . . . . . . .        3.9
               "Register". . . . . . . . . . . . . . . . . . . . . . . . .        2.3
               "Registrar" . . . . . . . . . . . . . . . . . . . . . . . .        2.3
               "Regulation S". . . . . . . . . . . . . . . . . . . . . . .        2.1
               "Regulation S Certificate". . . . . . . . . . . . . . . . .        2.1
               "Regulation S Global Note". . . . . . . . . . . . . . . . .        2.1
               "Regulation S Legend" . . . . . . . . . . . . . . . . . . .        2.1
               "Regulation S Note" . . . . . . . . . . . . . . . . . . . .        2.1
               "Regulation S Permanent Global Note". . . . . . . . . . . .        2.1
               "Regulation S Temporary Global Note". . . . . . . . . . . .        2.1
               "Release Date". . . . . . . . . . . . . . . . . . . . . . .        2.1
               
<PAGE>

                                                                                         24

               "Resale Restriction Termination Date" . . . . . . . . . . .        2.3
               "Representative". . . . . . . . . . . . . . . . . . . . . .       10.2
               "Restricted Payments" . . . . . . . . . . . . . . . . . . .        4.7
               "Rule 144A" . . . . . . . . . . . . . . . . . . . . . . . .        2.1
               "Rule 144A Global Note" . . . . . . . . . . . . . . . . . .        2.1
               "Rule 144A Note". . . . . . . . . . . . . . . . . . . . . .        2.1
               "Senior Debt" . . . . . . . . . . . . . . . . . . . . . . .       10.2
               "Subsequent Series Securities". . . . . . . . . . . . . . .        2.2
</TABLE>

          Section 1.3.  INCORPORATION BY REFERENCE OF TRUST INDENTURE ACT.

          Whenever this Indenture refers to a provision of the TIA, the
provision is incorporated by reference in and made a part of this Indenture.

          The following TIA terms used in this Indenture have the following
meanings:

          "INDENTURE SECURITIES" means the Securities;

          "INDENTURE TO BE QUALIFIED" means this Indenture;

          "INDENTURE TRUSTEE" or "INSTITUTIONAL TRUSTEE" means the Trustee;

          "OBLIGOR" with respect to the Securities means the Company and with
respect to the Subsidiary Guarantees means the Subsidiary Guarantors and any
successor obligor upon the Securities and the Subsidiary Guarantees,
respectively.

          All other terms used in this Indenture that are defined by the TIA,
defined by TIA reference to another statute or defined by rule enacted by the
Commission under the TIA have the meanings so assigned to them.

          Section 1.4.  RULES OF CONSTRUCTION.

          Unless the context otherwise requires:

          (1)  a term has the meaning assigned to it;

          (2)  an accounting term not otherwise defined has the meaning assigned
     to it in accordance with GAAP;

          (3)  "OR" is not exclusive;

          (4)  words in the singular include the plural, and in the plural
     include the singular;

          (5)  provisions apply to successive events and transactions; and

          (6)  references to sections of or rules under the Securities Act shall
     be deemed to include substitute, replacement of successor sections or rules
     adopted by the Commission from time to time.


<PAGE>

                                                                              25

























<PAGE>

                                                                              26

                                      ARTICLE 2
                                    THE SECURITIES

          Section 2.1.  FORM, DATING AND TERMS.

          (a)  The Initial Securities are being offered and sold by the Company
pursuant to the Purchase Agreement.

          Initial Securities offered and sold to the qualified institutional
buyers (as defined in Rule 144A under the Securities Act ("RULE 144A")) in the
United States of America (the "RULE 144A NOTE") will be issued on the Issue Date
in the form of a permanent global Security substantially in the form of Exhibit
A, which is hereby incorporated by reference and made a part of this Indenture,
together with appropriate legends as set forth in Section 2.1(c)  (the "RULE
144A GLOBAL NOTE"), deposited with the Trustee, as custodian for the Depositary,
duly executed by the Company and authenticated by the Trustee as hereinafter
provided.  The Rule 144A Global Note may be represented by more than one
certificate, if so required by the Depositary's rules regarding the maximum
principal amount to be represented by a single certificate.  The aggregate
principal amount of the Rule 144A Global Note may from time to time be increased
or decreased by adjustments made on the records of the Trustee, as custodian for
the Depositary or its nominee, as hereinafter provided.


<PAGE>

                                                                              27

          Initial Securities offered and sold outside the United States of
America ("Regulation S Note") in reliance on Regulation S will be issued on the
Issue Date in the form of a temporary global Security, without interest coupons,
substantially in the form set forth in Exhibit A, which is hereby incorporated
by reference and made a part of this Indenture, together with appropriate
legends as set forth in Section 2.1(c) (a "REGULATION S TEMPORARY GLOBAL NOTE").
Beneficial interests in a Regulation S Temporary Global Note will be
exchangeable for beneficial interests in a single permanent global Security (the
"REGULATION S PERMANENT GLOBAL NOTE", together with the Regulation S Temporary
Global Note, the "REGULATION S GLOBAL NOTE") on or after the expiration of the
Restricted Period (the "RELEASE DATE") upon the receipt by the Trustee or its
agent of a certificate certifying that the Holder of the beneficial interest in
the Regulation S Temporary Global Note is a non-United States Person within the
meaning of Regulation S (a "REGULATION S CERTIFICATE"), substantially in the
form set forth in Section 2.14.  Upon receipt by the Trustee or Paying Agent of
a Regulation S Certificate, (i) with respect to the first such Regulation S
Certificate, the Company shall execute and upon receipt of a written order of
the Company signed by two officers for authentication, the Trustee shall
authenticate and deliver to the Note Custodian, the Regulation S Permanent
Global Note and (ii) with respect to the first and all subsequent Regulation S
Certificates, the Note Custodian shall exchange on behalf of the applicable
beneficial owners the portion of the Regulation S Temporary Global Note covered
by such Regulation S Certificates for a comparable portion of the Regulation S
Permanent Global Note.  Upon any exchange of a portion of a Regulations S
Temporary Global Note for a comparable portion of a Regulation S Permanent
Global Note, the Note Custodian shall endorse on the schedules affixed to each
of such Regulation S Global Note (or on continuations of such schedules affixed
to each of such Regulation S Global Note and made parts thereof) appropriate
notations evidencing the date of transfer and (x) with respect to the Regulation
S Temporary Global Note, a decrease in the principal amount thereof equal to the
amount covered by the applicable certification and (y) with respect to the
Regulation S Permanent Global Note, an increase in the principal amount thereof
equal to the principal amount of the decrease in the Regulation S Temporary
Global Note pursuant to clause (x) above.  The Regulation S Global Note will be
deposited with the Note Custodian for the Depositary, duly executed by the
Company and authenticated by the Trustee as hereinafter provided.  The
Regulation S Global Note may be represented by more than one certificate, if so
required by the Depositary's rules regarding the maximum principal amount to be
represented by a single certificate. The aggregate principal amount of the
Regulation S Global Note may from time to time be increased or decreased by
adjustments ade on the records of the Note Custodian for the Depositary or its
nominee, as hereinafter provided.

          Initial Securities resold to institutional "accredited investors" (as
defined in Rules 501(a)(1), (2), (3) and (7) under


<PAGE>

                                                                              28

the Securities Act) in the United States of America (the "INSTITUTIONAL 
ACCREDITED INVESTOR NOTE") will be issued in the form of a permanent global 
Security substantially in the form of Exhibit A, which is hereby incorporated 
by reference and made a part of this Indenture, together with appropriate 
legends as set forth in Section 2.1(c) (the "INSTITUTIONAL ACCREDITED 
INVESTOR GLOBAL NOTE") deposited with the Note Custodian, duly executed by 
the Company and authenticated by the Trustee as hereinafter provided. The 
Institutional Accredited Investor Global Note may be represented by more than 
one certificate, if so required by the Depositary's rules regarding the 
maximum principal amount to be represented by a single certificate.  The 
aggregate principal amount of the Institutional Accredited Investor Global 
Note may from time to time be increased or decreased by adjustments made on 
the records of the Note Custodian for the Depositary or its nominee, as 
hereinafter provided.

          Exchange Securities exchanged for interests in the Rule 144A Note, the
Regulation S Note and the Institutional Accredited Investor Note will be issued
in the form of a permanent global Security substantially in the form of Exhibit
B, which is hereby incorporated by reference and made a part of this Indenture,
deposited with the Trustee as hereinafter provided, with the appropriate legend
set forth in Section 2.1(c) (the "EXCHANGE GLOBAL NOTE").  The Exchange Global
Note may be represented by more than one certificate, if so required by the
Depositary's rules regarding the maximum principal amount to be represented by a
single certificate.  

          The Rule 144A Global Note, the Regulation S Global Note, the Exchange
Global Note and the Institutional Accredited Investor Global Note are sometimes
collectively herein referred to as the "Global Securities."

          The principal of (and premium, if any) and interest on the Securities
shall be payable at the office or agency of the Company maintained for such
purpose in The City of New York, or at such other office or agency of the
Company as may be maintained for such purpose pursuant to Section 2.3; PROVIDED,
HOWEVER, that, at the option of the Company, each installment of interest may be
paid by (i) check mailed to addresses of the Persons entitled thereto as such
addresses shall appear on the Register or (ii) wire transfer to an account
located in the United States maintained by the payee.

          The Private Exchange Securities shall be in the form of Exhibit A. 
The Securities may have notations, legends or endorsements required by law,
stock exchange rule or usage, in addition to those set forth on Exhibits A and B
and in Section 2.1(c).  The Company and the Trustee shall approve the forms of
the Securities and any notation, endorsement or legend on them.  Each Security
shall be dated the date of its authentication.  The terms of the Securities set
forth in Exhibit A and Exhibit B are part of the terms of this Indenture and, to
the extent applicable, the Company and the Trustee, by their execution and


<PAGE>

                                                                              29

delivery of this Indenture, expressly agree to be bound by such terms.

          (b)  DENOMINATIONS.  The Securities shall be issuable only in fully
registered form, without coupons, and only in denominations of $1,000 and any
integral multiple thereof.

          (c)  RESTRICTIVE LEGENDS.  Unless and until (i) an Initial Security is
sold under an effective registration statement or (ii) an Initial Security is
exchanged for an Exchange Security in connection with an effective registration
statement, in each case pursuant to the Registration Rights Agreement, (A) such
Rule 144A Global Note and the Institutional Accredited Investor Global Note
shall bear the following legend (the "PRIVATE PLACEMENT LEGEND") on the face
thereof:

     "THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED (THE "SECURITIES ACT"), OR THE SECURITIES LAWS OF ANY STATE OR OTHER
JURISDICTION.  NEITHER THIS SECURITY NOR ANY INTEREST OR PARTICIPATION HEREIN
MAY BE REOFFERED, SOLD, ASSIGNED, TRANSFERRED, PLEDGED, ENCUMBERED OR OTHERWISE
DISPOSED OF IN THE ABSENCE OF SUCH REGISTRATION OR UNLESS SUCH TRANSACTION IS
EXEMPT FROM, OR NOT SUBJECT TO, SUCH REGISTRATION.

     THE HOLDER OF THIS SECURITY BY ITS ACCEPTANCE HEREOF AGREES TO OFFER, SELL
OR OTHERWISE TRANSFER SUCH SECURITY, PRIOR TO THE DATE (THE "RESALE RESTRICTION
TERMINATION DATE") WHICH IS TWO YEARS AFTER THE LATER OF THE ORIGINAL ISSUE DATE
HEREOF AND THE LAST DATE ON WHICH THE COMPANY OR ANY AFFILIATE OF THE COMPANY
WAS THE OWNER OF THIS SECURITY (OR ANY PREDECESSOR OF SUCH SECURITY), ONLY (A)
TO THE COMPANY, (B) PURSUANT TO A REGISTRATION STATEMENT THAT HAS BEEN DECLARED
EFFECTIVE UNDER THE SECURITIES ACT, (C) FOR SO LONG AS THE SECURITIES ARE
ELIGIBLE FOR RESALE PURSUANT TO RULE 144A UNDER THE SECURITIES ACT, TO A PERSON
IT REASONABLY BELIEVES IS A "QUALIFIED INSTITUTIONAL BUYER" AS DEFINED IN RULE
144A UNDER THE SECURITIES ACT THAT PURCHASES FOR ITS OWN ACCOUNT OR FOR THE
ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER TO WHOM NOTICE IS GIVEN THAT THE
TRANSFER IS BEING MADE IN RELIANCE ON RULE 144A, (D) PURSUANT TO OFFERS AND
SALES THAT OCCUR OUTSIDE THE UNITED STATES WITHIN THE MEANING OF REGULATION S
UNDER THE SECURITIES ACT, (E) TO AN "ACCREDITED INVESTOR" WITHIN THE MEANING OF
RULE 501(a)(1), (2), (3) OR (7) UNDER THE SECURITIES ACT THAT IS AN
INSTITUTIONAL INVESTOR ACQUIRING THE SECURITY FOR ITS OWN ACCOUNT OR FOR THE
ACCOUNT OF SUCH AN INSTITUTIONAL ACCREDITED INVESTOR, IN EACH CASE IN A MINIMUM
PRINCIPAL AMOUNT OF $250,000, FOR INVESTMENT PURPOSES AND NOT WITH A VIEW TO OR
FOR OFFER OR SALE IN CONNECTION WITH ANY DISTRIBUTION IN VIOLATION OF THE
SECURITIES ACT, OR (F) PURSUANT TO ANY OTHER AVAILABLE EXEMPTION FROM THE
REGISTRATION REQUIREMENTS OF THE SECURITIES ACT, SUBJECT TO THE COMPANY'S AND
THE TRUSTEE'S RIGHT PRIOR TO ANY SUCH OFFER, SALE OR TRANSFER PURSUANT TO
CLAUSES (D), (E) AND (F)


<PAGE>

                                                                              30

TO REQUIRE THE DELIVERY OF AN OPINION OF COUNSEL, CERTIFICATION AND/OR OTHER 
INFORMATION SATISFACTORY TO EACH OF THEM. THIS LEGEND WILL BE REMOVED UPON 
THE REQUEST OF THE HOLDER AFTER THE RESALE RESTRICTION TERMINATION DATE."; 
and 

          (B)  the Regulation S Global Note shall bear the following legend (the
"REGULATION S LEGEND") on the face thereof:

     "THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT OF
1933, AS AMENDED (THE "SECURITIES ACT"), AND, ACCORDINGLY, MAY NOT BE OFFERED OR
SOLD WITHIN THE UNITED STATES OR TO OR FOR THE ACCOUNT OR BENEFIT OF, U.S.
PERSONS EXCEPT AS SET FORTH IN THE FOLLOWING SENTENCE.  BY ITS ACQUISITION
HEREOF, THE HOLDER (1) REPRESENTS THAT IT IS NOT A U.S. PERSON NOR IS IT
PURCHASING FOR THE ACCOUNT OF A U.S. PERSON AND IS ACQUIRING THIS SECURITY IN AN
OFFSHORE TRANSACTION IN ACCORDANCE WITH REGULATION S UNDER THE SECURITIES ACT
("REGULATION S"), (2) BY ITS ACCEPTANCE HEREOF AGREES TO OFFER, SELL OR
OTHERWISE TRANSFER SUCH SECURITY, PRIOR TO THE DATE (THE "RESALE RESTRICTION
TERMINATION DATE") WHICH IS TWO YEARS AFTER THE LATER OF THE ORIGINAL ISSUE DATE
HEREOF AND THE LAST DATE ON WHICH THE COMPANY OR ANY AFFILIATE OF THE COMPANY
WAS THE OWNER OF THIS SECURITY (OR ANY PREDECESSOR OF SUCH SECURITY), ONLY (A)
TO THE COMPANY, (B) PURSUANT TO A REGISTRATION STATEMENT THAT HAS BEEN DECLARED
EFFECTIVE UNDER THE SECURITIES ACT, (C) FOR SO LONG AS THE SECURITIES ARE
ELIGIBLE FOR RESALE PURSUANT TO RULE 144A UNDER THE SECURITIES ACT, TO A PERSON
IT REASONABLY BELIEVES IS A "QUALIFIED INSTITUTIONAL BUYER" AS DEFINED IN RULE
144A UNDER THE SECURITIES ACT THAT PURCHASES FOR ITS OWN ACCOUNT OR FOR THE
ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER TO WHOM NOTICE IS GIVEN THAT THE
TRANSFER IS BEING MADE IN RELIANCE ON RULE 144A, (D) PURSUANT TO OFFERS AND
SALES THAT OCCUR OUTSIDE THE UNITED STATES WITHIN THE MEANING OF REGULATION S,
(E) TO AN "ACCREDITED INVESTOR" WITHIN THE MEANING OF RULE 501(a)(1), (2), (3)
OR (7) UNDER THE SECURITIES ACT THAT IS AN INSTITUTIONAL INVESTOR ACQUIRING THE
SECURITY FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF SUCH AN INSTITUTIONAL
ACCREDITED INVESTOR, IN EACH CASE IN A MINIMUM PRINCIPAL AMOUNT OF THE
SECURITIES OF $250,000, FOR INVESTMENT PURPOSES AND NOT WITH A VIEW TO OR FOR
OFFER OR SALE IN CONNECTION WITH ANY DISTRIBUTION IN VIOLATION OF THE SECURITIES
ACT, OR (F) PURSUANT TO ANOTHER AVAILABLE EXMPTION FROM THE REGISTRATION
REQUIREMENTS OF THE SECURITIES ACT, SUBJECT TO THE COMPANY'S AND THE TRUSTEE'S
RIGHT PRIOR TO ANY SUCH OFFER, SALE OR TRANSFER PURSUANT TO CLAUSES (D), (E) OR
(F) TO REQUIRE THE DELIVERY OF AN OPINION OF COUNSEL, CERTIFICATION AND/OR OTHER
INFORMATION SATISFACTORY TO EACH OF THEM AND IN THE CASE OF THE FOREGOING CLAUSE
(E), A CERTIFICATE OF TRANSFER IN THE FORM APPEARING ON THE OTHER SIDE OF THIS
SECURITY IS COMPLETED AND DELIVERED BY THE TRANSFEROR TO THE COMPANY AND THE
TRUSTEE.  THIS LEGEND WILL BE REMOVED AFTER 40 CONSECUTIVE DAYS BEGINNING ON AND
INCLUDING THE LATER OF (A) THE DAY ON WHICH THE SECURITIES ARE OFFERED TO
PERSONS OTHER THAN


<PAGE>

                                                                              31

     DISTRIBUTORS (AS DEFINED IN REGULATION S) AND (B) THE DATE OF THE 
     CLOSING OF THE ORIGINAL OFFERING.  AS USED HEREIN, THE TERMS "OFFSHORE 
     TRANSACTION", "UNITED STATES" AND "U.S. PERSON" HAVE THE MEANINGS 
     GIVEN TO THEM BY REGULATION S UNDER THE SECURITIES ACT."
    
          The Global Securities, whether or not an Initial Security, shall bear
the following legend on the face thereof:

     "UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED 
     REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION 
     ("DTC"), NEW YORK, NEW YORK, TO THE COMPANY OR ITS AGENT FOR 
     REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE 
     ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME 
     AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY 
     PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED 
     BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER 
     USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL 
     INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST 
     HEREIN.

     TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS 
     IN WHOLE, BUT NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR 
     THEREOF OR SUCH SUCCESSOR'S NOMINEE AND TRANSFERS OF PORTIONS OF THIS 
     GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH 
     THE RESTRICTIONS SET FORTH IN THE INDENTURE REFERRED TO ON THE REVERSE 
     HEREOF.
     
     THIS SECURITY IS SUBORDINATED TO SENIOR DEBT, AS DEFINED IN THE 
     INDENTURE (AS DEFINED HEREIN), AND THE OBLIGATIONS OF EACH SUBSIDIARY 
     GUARANTOR UNDER THE SUBSIDIARY GUARANTEE CONTAINED IN THE INDENTURE 
     ARE SUBORDINATED TO GUARANTOR SENIOR INDEBTEDNESS, AS DEFINED IN THE 
     INDENTURE, OF SUCH SUBSIDIARY GUARANTOR."

          The Regulation S Temporary Global Note shall also bear the following
legend on the face thereof:

     "THIS GLOBAL NOTE IS A TEMPORARY GLOBAL NOTE FOR PURPOSES OF 
     REGULATION S UNDER THE UNITED STATES SECURITIES ACT OF 1933, AS 
     AMENDED (THE "1933 ACT"). NEITHER THIS TEMPORARY GLOBAL NOTE NOR ANY 
     INTEREST HEREIN MAY BE OFFERED, SOLD OR DELIVERED, EXCEPT AS PERMITTED 
     UNDER THE INDENTURE REFERRED TO BELOW.

     NO BENEFICIAL OWNERS OF THIS TEMPORARY GLOBAL NOTE SHALL BE 
     ENTITLED TO RECEIVE PAYMENT OF PRINCIPAL OR INTEREST HEREON UNLESS THE 
     REQUIRED CERTIFICATIONS HAVE BEEN DELIVERED PURSUANT TO THE TERMS OF 
     THE INDENTURE."

          (d)  BOOK-ENTRY PROVISIONS.  (i)  This Section 2.1(d) shall apply only
to Global Securities deposited with the Trustee, as Note Custodian for the
Depositary.


<PAGE>

                                                                              32

          (ii)  Each Global Security initially shall (x) be registered in the
name of the Depositary for such Global Security or the nominee of the
Depositary, (y) be delivered to the Note Custodian and (z) bear legends as set
forth in Section 2.1(c).

          (iii)  Members of, or participants in, the Depositary ("AGENT
MEMBERS") shall have no rights under this Indenture with respect to any Global
Security held on their behalf by the Depositary or by the Note Custodian or
under such Global Security, and the Depositary may be treated by the Company,
the Trustee and any agent of the Company or the Trustee as the absolute owner of
such Global Security for all purposes whatsoever.  Notwithstanding the
foregoing, nothing herein shall prevent the Company, the Trustee or any agent of
the Company or the Trustee from giving effect to any written certification,
proxy or other authorization furnished by the Depositary or impair, as between
the Depositary and its Agent Members, the operation of customary practices of
the Depositary governing the exercise of the rights of a holder of a beneficial
interest in any Global Security.

          (iv)  In connection with any transfer of a portion of the beneficial
interest in a Global Security pursuant to subsection (e) of this Section to
beneficial owners who are required to hold Definitive Securities, the Trustee
shall reflect on its books and records the date and a decrease in the principal
amount of such Global Security in an amount equal to the principal amount of the
beneficial interest in the Global Security to be transferred, and the Company
shall execute, and the Trustee shall authenticate and deliver, one or more
Definitive Securities of like tenor and amount.

          (v)  In connection with the transfer of an entire Global Security to
beneficial owners pursuant to subsection (e) of this Section, such Global
Security shall be deemed to be surrendered to the Trustee for cancellation, and
the Company shall execute, and the Trustee shall authenticate and deliver, to
each beneficial owner identified by the Depositary in exchange for its
beneficial interest in such Global Security, an equal aggregate principal amount
of Definitive Securities of authorized denominations.

          (e)  DEFINITIVE SECURITIES.  Except as provided below, owners of
beneficial interests in Global Securities will not be entitled to receive
certificated Securities ("DEFINITIVE SECURITIES").  If required to do so
pursuant to any applicable law or regulation, beneficial owners may obtain
Definitive Securities in exchange for their beneficial interests in a Global
Security upon written request in accordance with the Depositary's and the
Registrar's procedures.  In addition, Definitive Securities shall be transferred
to all beneficial owners in exchange for their beneficial interests in a Global
Security if (i) the Depositary notifies the Company in writing that it is
unwilling or unable to continue as depositary for such Global Security or the
Depositary ceases to be a clearing agency


<PAGE>

                                                                              33

registered under the Exchange Act, at a time when the Depositary is required 
to be so registered in order to act as depositary, and in each case a 
successor depositary is not appointed by the Company within 90 days of such 
notice or, (ii) the Company executes and delivers to the Trustee and 
Registrar an Officers' Certificate stating that such Global Security shall be 
so exchangeable or (iii) an Event of Default has occurred and is continuing 
and the Registrar has received a request from the Depositary to do so.  

          (f)  Any Definitive Security delivered in exchange for an interest in
a Global Security pursuant to Section 2.1(d)(iv) or (v) shall, except as
otherwise provided by Section 2.6(c), bear the applicable legend regarding
transfer restrictions applicable to the Definitive Security set forth in Section
2.1(c).

          (g)  The registered holder of a Global Security may grant proxies and
otherwise authorize any person, including Agent Members and persons that may
hold interests through Agent Members, to take any action which a Holder is
entitled to take under this Indenture or the Securities.

          Section 2.2.  EXECUTION AND AUTHENTICATION.

          Two Officers shall sign the Securities for the Company by manual or
facsimile signature.  The Company's seal shall be reproduced on the Securities
and may be in facsimile form.

          If an Officer whose signature is on a Security no longer holds that
office at the time a Security is authenticated, the Security shall nevertheless
be valid.

          A Security shall not be valid until authenticated by the manual
signature of an authorized signatory of the Trustee.  The signature shall be
conclusive evidence that the Security has been authenticated under this
Indenture.

          The Trustee shall authenticate and make available for delivery (1)
Initial Securities for original issue in an aggregate principal amount of $150.0
million, and (2) Exchange Securities for issue only in a Registered Exchange
Offer, pursuant to the Registration Rights Agreement, in exchange for Initial
Securities of an equal principal amount, and (3) additional series of notes
which may be offered subsequent to the Issue Date (the "SUBSEQUENT SERIES
SECURITIES") in an aggregate principal amount not to exceed $150,000,000, in
each case upon a written order of the Company signed by two Officers.  Such
order shall specify the amount of the Securities to be authenticated, the date
on which the original issue of Securities is to be authenticated and whether the
Securities are to be Initial Securities or Exchange Securities or Subsequent
Series Securities.  The aggregate principal amount of notes which may be
authenticated and delivered under this Indenture is limited to $300.0 million
outstanding except as provided in Section 2.7.   No Subsequent Series Securities
may be authenticated and


<PAGE>

                                                                              34

delivered in an aggregate principal amount of less than $25,000,000.  All 
Securities issued on the Issue Date and all Subsequent Series Securities 
shall be identical in all respects other than issue dates, the date from 
which interest accrues and any changes relating thereto.  Notwithstanding 
anything to the contrary contained in this Indenture, all notes issued under 
this Indenture shall vote and consent together on all matters as one class 
and no series of notes will have the right to vote or consent as a separate 
class on any matter.

          The Trustee may appoint an authenticating agent acceptable to the
Company to authenticate Securities.  An authenticating agent may authenticate
Securities whenever the Trustee may do so.  Each reference in this Indenture to
authentication by the Trustee includes authentication by such agent.  An
authenticating agent has the same rights as an Agent to deal with the Company or
an Affiliate of the Company.

          Section 2.3.  REGISTRAR AND PAYING AGENT.

          The Company shall maintain an office or agency in the Borough of
Manhattan, The City of New York where (i) Securities may be presented for
registration of transfer or for exchange ("REGISTRAR") and (ii) Securities may
be presented for payment ("PAYING AGENT").  The Registrar shall keep a register
of the Securities and of their transfer and exchange (the "Register").  The
Company may appoint one or more co-registrars and one or more additional paying
agents.  The term "Registrar" includes any co-registrar and the term "Paying
Agent" includes any additional paying agent.  The Company may change any Paying
Agent or Registrar without notice to any Holder.  The Company shall enter into
an appropriate agency agreement with any Registrar, Paying Agent or co-registrar
not a party to this Indenture, which shall incorporate the terms of the TIA. 
The agreement shall implement the provisions of this Indenture that relate to
such agent.  The Company shall notify the Trustee in writing of the name and
address of any Agent not a party to this Indenture.  If the Company fails to
appoint or maintain another entity as Registrar or Paying Agent, the Trustee
shall act as such.  The Company or any of its Subsidiaries may act as Paying
Agent or Registrar.

          The Company initially appoints The Depository Trust Company ("DTC") to
act as Depositary with respect to the Global Securities.

          The Company initially appoints the Trustee to act as the Registrar and
Paying Agent and to act as Note Custodian with respect to the Global Securities.


<PAGE>

                                                                              35

          Section 2.4.  PAYING AGENT TO HOLD MONEY IN TRUST.

          The Company shall require each Paying Agent, including the Trustee
(who shall be deemed to have agreed by its execution of this Indenture), to
agree in writing that the Paying Agent shall hold in trust for the benefit of
Holders or the Trustee (unless the Paying Agent is the Trustee, in which case it
shall hold in trust for the Holders) all money held by the Paying Agent for the
payment of principal, premium, if any, or interest, on the Securities, and shall
notify the Trustee of any default by the Company or any Subsidiary Guarantor in
making any such payment.  While any such default continues, the Trustee may
require a Paying Agent to pay all money held by it to the Trustee.  The Company
at any time may require a Paying Agent to pay all money held by it to the
Trustee.  Upon payment over to the Trustee, the Paying Agent (if other than the
Company or a Subsidiary) shall have no further liability for the money.  If the
Company or a Subsidiary acts as Paying Agent, it shall segregate and hold in a
separate trust fund for the benefit of the Holders all money held by it as
Paying Agent.  Upon any bankruptcy or reorganization proceedings relating to the
Company or a Subsidiary, the Trustee shall serve as sole Paying Agent for the
Securities.

          Section 2.5.  HOLDER LISTS.

          The Trustee shall preserve in as current a form as is reasonably
practicable the most recent list available to it of the names and addresses of
all Holders.  If the Trustee is not the Registrar, the Company shall furnish to
the Trustee at least seven Business Days before each interest payment date and
at such other times as the Trustee may request in writing, a list in such form
and as of such date as the Trustee may reasonably require of the names and
addresses of the Holders of Securities, which list may be conclusively relied
upon by the Trustee.

          Section 2.6.  TRANSFER AND EXCHANGE.

          (a)  The following provisions shall apply with respect to any proposed
transfer of a Rule 144A Note or an Institutional Accredited Investor Note prior
to the date which is two years after the later of the date of original issue and
the last date on which the Company or any affiliate of the Company was the owner
of such Securities (or any predecessor thereto) (the "RESALE RESTRICTION
TERMINATION DATE"):

               (1)  a transfer of a Rule 144A Note or an Institutional
     Accredited Investor Note or a beneficial interest therein to a QIB shall be
     made upon the representation of the transferee that it is purchasing the
     Security for its own account or an account with respect to which it
     exercises sole investment discretion and that it and any such account is a
     "qualified institutional buyer" within the meaning of Rule 144A, and is
     aware that the sale to it is being made in reliance on Rule 144A and
     acknowledges that it has received such information regarding


<PAGE>

                                                                              36

     the Company as the undersigned has requested pursuant to Rule 144A or 
     has determined not to request such information and that it is aware that 
     the transferor is relying upon its foregoing representations in order to 
     claim the exemption from registration provided by Rule 144A;

               (2)  a transfer of a Rule 144A Note or an Institutional
     Accredited Investor Note or a beneficial interest therein to an
     institutional accredited investor shall be made upon receipt by the Trustee
     or its agent of a certificate substantially in the form set forth in
     Section 2.13 from the proposed transferee and, if requested by the Company
     or the Trustee, the delivery of an opinion of counsel, certification and/or
     other information satisfactory to each of them; and

               (3)  a transfer of a Rule 144A Note or an Institutional
     Accredited Investor Note or a beneficial interest therein to a Non-U.S.
     Person shall be made upon receipt by the Trustee or its agent of a
     certificate substantially in the form set forth in Section 2.14 from the
     proposed transferee and, if requested by the Company or the Trustee, the
     delivery of an opinion of counsel, certification and/or other information
     satisfactory to each of them.

          (b)  The following provisions shall apply with respect to any proposed
transfer of a Regulation S Note prior to the expiration of the Restricted
Period:

               (1)  a transfer of a Regulation S Note or a beneficial interest
     therein to a QIB shall be made upon the representation of the transferee,
     in the form of assignment on the reverse of the certificate, that it is
     purchasing the Security for its own account or an account with respect to
     which it exercises sole investment discretion and that it and any such
     account is a "qualified institutional buyer" within the meaning of
     Rule 144A, and is aware that the sale to it is being made in reliance on
     Rule 144A and acknowledges that it has received such information regarding
     the Company as the undersigned has requested pursuant to Rule 144A or has
     determined not to request such information and that it is aware that the
     transferor is relying upon its foregoing representations in order to claim
     the exemption from registration provided by Rule 144A;

               (2)  a transfer of a Regulation S Note or a beneficial interest
     therein to an institutional accredited investor shall be made upon receipt
     by the Trustee or its agent of a certificate substantially in the form set
     forth in Section 2.13 from the proposed transferee and, if requested by the
     Company or the Trustee, the delivery of an opinion of counsel,
     certification and/or other information satisfactory to each of them; and

               (3)  a transfer of a Regulation S Note or a


<PAGE>

                                                                              37

     beneficial interest therein to a Non-U.S. Person shall be made upon 
     receipt by the Trustee or its agent of a certificate substantially in 
     the form set forth in Section 2.14 from the proposed transferee and, if 
     requested by the Company or the Trustee, receipt by the Trustee or its 
     agent of an opinion of counsel, certification and/or other information 
     satisfactory to each of them.

          After the expiration of the Restricted Period, interests in the
Regulation S Note may be transferred without requiring certification set forth
in Section 2.14 or any additional certification.

          (c)  RESTRICTED SECURITIES LEGEND.  Upon the transfer, exchange or
replacement of Securities not bearing a Restricted Securities Legend, the
Registrar shall deliver Securities that do not bear a Restricted Securities
Legend.  Upon the transfer, exchange or replacement of Securities bearing a
Restricted Securities Legend, the Registrar shall deliver only Securities that
bear a Restricted Securities Legend unless, in the case of a Regulation S Note,
such transfer, exchange or replacement occurs after the Restricted Period or
there is delivered to the Registrar an Opinion of Counsel to the effect that
neither such legend nor the related restrictions on transfer are required in
order to maintain compliance with the provisions of the Securities Act.

          (d)  The Company shall deliver to the Trustee an Officers' Certificate
setting forth the Resale Restriction Termination Date.  

          The Registrar shall retain copies of all letters, notices and other
written communications received pursuant to Section 2.1 or this Section 2.6. 
The Company shall have the right to inspect and make copies of all such letters,
notices or other written communications at any reasonable time upon the giving
of reasonable written notice to the Registrar.

          (e)  OBLIGATIONS WITH RESPECT TO TRANSFERS AND EXCHANGES OF
SECURITIES.

               (1)  To permit registrations of transfers and exchanges, the
     Company shall, subject to the other terms and conditions of this Article
     II, execute and the Trustee shall authenticate Definitive Securities and
     Global Securities at the Registrar's or co-registrar's request.

               (2)  No service charge shall be made to a Holder for any
     registration of transfer or exchange, but the Company may require payment
     of a sum sufficient to cover any transfer tax, assessments, or similar
     governmental charge payable in connection therewith (other than any such
     transfer taxes, assessments or similar governmental charges payable upon
     exchange or transfer pursuant to Sections 4.10, 4.13 or 9.5 or pursuant to
     paragraph 5 of the Securities).


<PAGE>

                                                                              38

               (3)  The Registrar or co-registrar shall not be required to
     register the transfer of or exchange of (A) any Definitive Security
     selected for redemption in whole or in part pursuant to Article III, except
     the unredeemed portion of any Definitive Security being redeemed in part or
     (B) any Security for a period beginning (1) 15 Business Days before the
     mailing of a notice of an offer to repurchase or redeem Securities and
     ending at the close of business on the day of such mailing or (2) 15
     Business Days before an interest payment date and ending on such interest
     payment date.

               (4)  Prior to the due presentation for registration of transfer
     of any Security, the Company, the Trustee, the Paying Agent, the Registrar
     or any co-registrar may deem and treat the person in whose name a Security
     is registered as the absolute owner of such Security for the purpose of
     receiving payment of principal of and interest on such Security and for all
     other purposes whatsoever, whether or not such Security is overdue, and
     none of the Company, the Trustee, the Paying Agent, the Registrar or any
     co-registrar shall be affected by notice to the contrary.

               (5)  Any Definitive Security delivered in exchange for an
     interest in a Global Security pursuant to Section 2.1(d) shall, except as
     otherwise provided by Section 2.6(c), bear the applicable legend regarding
     transfer restrictions applicable to the Definitive Security set forth in
     Section 2.1(c).

               (6)  All Securities issued upon any transfer or exchange pursuant
     to the terms of this Indenture shall evidence the same debt and shall be
     entitled to the same benefits under this Indenture as the Securities
     surrendered upon such transfer or exchange.

          (f)  NO OBLIGATION OF THE TRUSTEE. (1) The Trustee shall have no
responsibility or obligation to any beneficial owner of a Global Security, a
member of, or a participant in, the Depositary or other Person with respect to
the accuracy of the records of the Depositary or its nominee or of any
participant or member thereof, with respect to any ownership interest in the
Securities or with respect to the delivery to any participant, member,
beneficial owner or other Person (other than the Depositary) of any notice
(including any notice of redemption) or the payment of any amount or delivery of
any Securities (or other security or property) under or with respect to such
Securities.  All notices and communications to be given to the Holders and all
payments to be made to Holders in respect of the Securities shall be given or
made only to or upon the order of the registered Holders (which shall be the
Depositary or its nominee in the case of a Global Security).  The rights of
beneficial owners in any Global Security shall be exercised only through the
Depositary subject to the applicable rules and procedures of the Depositary. 
The Trustee may rely and shall be fully protected in relying upon information
furnished by the Depositary with respect to its members, participants and any
beneficial owners.


<PAGE>

                                                                              39

          (2)  The Trustee shall have no obligation or duty to monitor,
determine or inquire as to compliance with any restrictions on transfer imposed
under this Indenture or under applicable law with respect to any transfer of any
interest in any Security (including any transfers between or among the
Depositary participants, members or beneficial owners in any Global Security);
PROVIDED that the Trustee shall have the right to require such certifications,
Opinions of Counsel or other documentation in respect of exchanges of beneficial
ownership interests in Global Securities for Definitive Securities as it may
reasonably request.

          Section 2.7.  REPLACEMENT SECURITIES.

          If any mutilated Security is surrendered to the Registrar, or if the
Holder of a Security claims that the Security has been lost, destroyed or
wrongfully taken, the Company and the Trustee receive evidence to their
satisfaction of the destruction, loss or theft of any Security, the Company
shall issue and the Trustee, upon the receipt of a written authentication order
of the Company signed by two Officers of the Company, shall authenticate a
replacement Security if the Trustee's requirements are met.  If required by the
Trustee or the Company, an indemnity bond must be supplied by the Holder that is
sufficient in the judgment of the Trustee and the Company to protect the
Company, the Trustee, any Agent and any authenticating agent from any loss that
any of them may suffer if a Security is replaced.  The Company and the Trustee
may charge for its expenses in replacing a Security.

          Every replacement Security is an additional obligation of the Company
and shall be entitled to all of the benefits of this Indenture equally and
proportionately with all other Securities duly issued hereunder.

          Section 2.8.  OUTSTANDING SECURITIES.

          The Securities outstanding at any time are all the Securities
authenticated by the Trustee except for those cancelled by it, those delivered
to it for cancellation, those reductions in the interest in a Global Note
effected by the Trustee in accordance with the provisions hereof, and those
described in this Section as not outstanding.  A Security does not cease to be
outstanding because the Company or an Affiliate of the Company holds the
Security.

          If a Security is replaced pursuant to Section 2.7 hereof, it ceases to
be outstanding unless the Trustee receives proof satisfactory to it that the
replaced Security is held by a bona fide purchaser.

          If the Paying Agent (other than the Company, a Subsidiary or an
Affiliate of any thereof) holds, on a redemption date or maturity date, money
sufficient to pay Securities payable on that date, then on and after that date
such Securities shall


<PAGE>

                                                                              40

be deemed to be no longer outstanding and shall cease to accrue interest.

          Section 2.9.  TEMPORARY SECURITIES.

          Until Definitive Securities are ready for delivery, the Company may
prepare and the Trustee shall authenticate temporary Securities.  Temporary
Securities shall be substantially in the form of Definitive Securities but may
have variations that the Company considers appropriate for temporary Securities.
Without unreasonable delay, the Company shall prepare and the Trustee shall
authenticate Definitive Securities and make them available for delivery in
exchange for temporary Securities.

          Section 2.10.  CUSIP NUMBER.

          The Company in issuing the Securities may use a "CUSIP" number, and if
so, the Trustee shall use the CUSIP number in notices of redemption or exchange
as a convenience to Holders; PROVIDED that any such notice may state that no
representation is made as to the correctness or accuracy of the CUSIP number
printed in the notice or on the Securities and that reliance may be placed only
on the other identification numbers printed on the Securities.

          In the event that the Company shall issue and the Trustee shall
authenticate any Subsequent Series Securities pursuant to Section 2.2, the
Company shall use its best efforts to obtain the same CUSIP number for such
Subsequent Series Securities as is printed on the Securities outstanding at such
time; PROVIDED, HOWEVER, that if any series of Subsequent Series Securities is
determined to be a different class of security than the Securities outstanding
at such time for federal income tax purposes, the Company may obtain a CUSIP
number for such series of Subsequent Series Securities that is different from
the CUSIP number printed on the Securities then outstanding.

          Section 2.11.  CANCELLATION.

          The Company at any time may deliver Securities to the Trustee for
cancellation.  The Registrar and Paying Agent shall forward to the Trustee any
Securities surrendered to them for registration of transfer, exchange or
payment.  The Trustee and no one else shall cancel all Securities surrendered
for registration of transfer, exchange, payment, replacement or cancellation and
shall destroy cancelled Securities (subject to the record retention requirements
of the Exchange Act).  Certification of the destruction of all cancelled
Securities shall be delivered to the Company.  The Company may not issue new
Securities to replace Securities that it has paid or that have been delivered to
the Trustee for cancellation.



<PAGE>
                                                                             41

          Section 2.12.  DEFAULTED INTEREST.

          If the Company defaults in a payment of interest on the Securities, 
it shall pay the defaulted interest in any lawful manner PLUS, to the extent 
lawful, interest payable on the defaulted interest, to the Persons who are 
Holders on a subsequent special record date, in each case at the rate 
provided in the Securities and in Section 4.1 hereof.  The Company shall 
notify the Trustee in writing of the amount of defaulted interest proposed to 
be paid on each Security and the date of the proposed payment.  The Company 
shall fix or cause to be fixed each such special record date and payment 
date, PROVIDED that no such special record date shall be less than 10 days 
prior to the related payment date for such defaulted interest.  At least 15 
days before the special record date, the Company (or, upon the written 
request of the Company, the Trustee in the name and at the expense of the 
Company) shall mail or cause to be mailed to Holders a notice that states the 
special record date, the related payment date and the amount of such interest 
to be paid.

          SECTION 2.13.  FORM OF CERTIFICATE TO BE DELIVERED IN CONNECTION 
WITH TRANSFERS TO INSTITUTIONAL ACCREDITED INVESTORS.                         

                                                           [Date]

United States Trust Company of New York
114 West 47th Street, 25th Floor
New York, NY 10036

Attention:  Corporate Trust Administration

Dear Sirs:

          This certificate is delivered to request a transfer of $________
principal amount of the 10 1/4% Senior Subordinated Notes due 2008 (the 
"Securities") of Continental Resources, Inc. (the "Company").

          The undersigned represents and warrants to you that:

          (1)  We are an institutional "accredited investor" (as defined in 
Rule 501(a)(1), (2), (3) or (7) under the Securities Act of 1933, as amended 
(the "Securities Act")) purchasing for our own account or for the account of 
such an institutional "accredited investor" at least $250,000 principal 
amount of the Securities, and we are acquiring the Securities not with a view 
to, or for offer or sale in connection with, any distribution in violation of 
the Securities Act. We have such knowledge and experience in financial and 
business matters as to be capable of evaluating the merits and risk of our 
investment in the Securities and we invest in or purchase securities similar 
to the Securities in the normal course of our business.  We and any accounts 
for which we are acting are each able to bear the economic risk of our or its 
investment.


<PAGE>
                                                                             42

          (2)  We understand that the Securities have not been registered 
under the Securities Act and, unless so registered, may not be sold except as 
permitted in the following sentence.  We agree on our own behalf and on 
behalf of any investor account for which we are purchasing Securities to 
offer, sell or otherwise transfer such Securities prior to the date which is 
two years after the later of the date of original issue and the last date on 
which the Company or any affiliate of the Company was the owner of such 
Securities (or any predecessor thereto) (the "Resale Restriction Termination 
Date") only (a) to the Company, (b) pursuant to a registration statement 
which has been declared effective under the Securities Act, (c) in a 
transaction complying with the requirements of Rule 144A under the Securities 
Act, to a person we reasonably believe is a qualified institutional buyer 
under Rule 144A (a "QIB") that purchases for its own account or for the 
account of a QIB and to whom notice is given that the transfer is being made 
in reliance on Rule 144A, (d) pursuant to offers and sales that occur outside 
the United States within the meaning of Regulation S under the Securities 
Act, (e) to an institutional "accredited investor" (within the meaning of 
Rule 501(a)(1), (2), (3) or (7) under the Securities Act) that is purchasing 
for its own account or for the account of such an institutional "accredited 
investor," in each case in a minimum principal amount of Securities of 
$250,000 or (f) pursuant to any other available exemption from the 
registration requirements of the Securities Act, subject in each of the 
foregoing cases to any requirement of law that the disposition of our 
property or the property of such investor account or accounts be at all times 
within our or their control and in compliance with any applicable state 
securities laws.  The foregoing restrictions on resale will not apply 
subsequent to the Resale Restriction Termination Date.  If any resale or 
other transfer of the Securities is proposed to be made pursuant to lause (e) 
above prior to the Resale Restriction Termination Date, the transferor shall 
deliver a letter from the transferee substantially in the form of this letter 
to the Company and the Trustee, which shall provide, among other things, that 
the transferee is an institutional "accredited investor" (within the meaning 
of Rule 501(a)(1), (2), (3) or (7) under the Securities Act) and that it is 
acquiring such Securities for investment purposes and not for distribution in 
violation of the Securities Act.  Each purchaser acknowledges that the 
Company and the Trustee reserve the right prior to any offer, sale or other 
transfer prior to the Resale Termination Date of the Securities pursuant to 
clauses (d), (e) or (f) above to require the delivery of an opinion of 
counsel, certifications and/or other information satisfactory to the Company 
and the Trustee.

                                       TRANSFEREE:
                                                   ----------------------------

                                       BY
                                         --------------------------------------

<PAGE>
                                                                             43

          SECTION 2.14.  FORM OF CERTIFICATE TO BE DELIVERED IN CONNECTION WITH 
TRANSFERS PURSUANT TO REGULATION S.

                                             [Date]

United States Trust Company of New York
114 West 47th Street, 25th Floor
New York, NY 10036

Attention:  Corporate Trust Administration

          Re:  Continental Resources, Inc.
               10 1/4% SENIOR SUBORDINATED NOTES DUE 2008 (THE "SECURITIES")

Ladies and Gentlemen:

          In connection with our proposed sale of $________ aggregate principal
amount of the Securities, we confirm that such sale has been effected pursuant
to and in accordance with Regulation S under the United States Securities Act 
of 1933, as amended (the "Securities Act"), and, accordingly, we represent that:

          (a)  the offer of the Securities was not made to a person in the
     United States;

          (b)  either (i) at the time the buy order was originated, the
     transferee was outside the United States or we and any person acting on our
     behalf reasonably believed that the transferee was outside the United
     States or (ii) the transaction was executed in, on or through the
     facilities of a designated off-shore securities market and neither we nor
     any person acting on our behalf knows that the transaction has been
     pre-arranged with a buyer in the United States;

          (c)  no directed selling efforts have been made in the United States
     in contravention of the requirements of Rule 903(b) or Rule 904(b) of
     Regulation S, as applicable; and

          (d)  the transaction is not part of a plan or scheme to evade the
     registration requirements of the Securities Act.

          In addition, if the sale is made during a restricted period and the
provisions of Rule 903(c)(3) or Rule 904(c)(1) of Regulation S are applicable
thereto, we confirm that such sale has been made in accordance with the
applicable provisions of Rule 903(c)(3) or Rule 904(c)(1), as the case may be.

<PAGE>
                                                                             44

          You and the Company are entitled to rely upon this letter and are 
irrevocably authorized to produce this letter or a copy hereof to any 
interested party in any administrative or legal proceedings or official inquiry 
with respect to the matters covered hereby.  Terms used in this certificate 
have the meanings set forth in Regulation S.

          Very truly yours,

          [Name of Transferor]


          By:
             -------------------------------------

          ----------------------------------------
          Authorized Signature Medallion Guaranteed  

          SECTION 2.15.  COMPUTATION OF INTEREST.  Interest on the Securities 
shall be computed on the basis of a 360-day year of twelve 30-day months.  


                                   ARTICLE 3
                           REDEMPTION AND PREPAYMENT

          Section 3.1.  NOTICES TO TRUSTEE.

          If the Company elects to redeem Securities pursuant to the optional 
redemption provisions of Section 3.7 hereof, then it shall furnish to the 
Trustee, at least 30 days but not more than 60 days before a redemption date, 
an Officers' Certificate setting forth (i) the paragraph of the Securities 
and/or Section of this Indenture pursuant to which the redemption shall occur, 
(ii) the redemption date, (iii) the principal amount of Securities to be 
redeemed and (iv) the redemption price.

          Section 3.2.  SELECTION OF SECURITIES TO BE REDEEMED.

          If less than all of the Securities are to be redeemed at any time, 
selection of Securities for redemption shall be made by the Trustee in 
compliance with the requirements of the principal national securities 
exchange, if any, on which the Securities are listed, or, if the Securities 
are not so listed, on a pro rata basis, by lot or by such method as the 
Trustee shall deem fair and appropriate; PROVIDED that no Security of $1,000 
or less shall be redeemed in part.  In the event of partial redemption by 
lot, the particular Securities to be redeemed shall be selected, unless 
otherwise provided herein, not less than 30 nor more than 60 days prior to 
the redemption date by the Trustee from the outstanding Securities not 
previously called for redemption.

          The Trustee shall promptly notify the Company in writing of the 
Securities selected for redemption and, in the case of any Security selected 
for partial redemption, the principal amount thereof to be redeemed.  
Securities and portions 


<PAGE>
                                                                             45

of Securities selected shall be in amounts of $1,000 or whole multiples of 
$1,000; except that if all of the Securities of a Holder are to be redeemed, 
the entire outstanding amount of Securities held by such Holder, even if not 
a multiple of $1,000, shall be redeemed.  A new Security in principal amount 
equal to the unredeemed portion thereof shall be issued in the name of the 
Holder thereof upon cancellation of the original Security.  On and after the 
redemption date, unless the Company defaults in payment of the redemption 
price, interest ceases to accrue on Securities or portions of them called for 
redemption. Except as provided in this Section 3.2, provisions of this 
Indenture that apply to Securities called for redemption also apply to 
portions of Securities called for redemption.

          The provisions of the two preceding paragraphs of this Section 3.2 
shall not apply with respect to any redemption affecting only a Global Note, 
whether such Global Note is to be redeemed in whole or in part.  In case of 
any such redemption in part, the unredeemed portion of the principal amount 
of the Global Note shall be in an authorized denomination.

          Section 3.3.  NOTICE OF REDEMPTION.

          Subject to the provisions of Section 3.9 hereof, at least 30 days 
but not more than 60 days before a redemption date, the Company shall mail or 
cause to be mailed, by first class mail, a notice of redemption to each 
Holder of Securities to be redeemed at such Holder's registered address, 
provided, however, that the Company shall provide notice to the Trustee in 
accordance with Section 3.1 hereof at least five days prior to the mailing of 
the notice pursuant to this Section 3.3.

          The notice shall identify the Securities to be redeemed and shall 
state:

          (a)  the redemption date;

          (b)  the redemption price;

          (c)  if any Security is being redeemed in part, the portion of the 
principal amount of such Security to be redeemed and that, after the 
redemption date upon surrender of such Security, a new Security or Securities 
in principal amount equal to the unredeemed portion shall be issued upon 
cancellation of the original Security;

          (d)  the name and address of the Paying Agent;

          (e)  that Securities called for redemption must be surrendered to 
the Paying Agent to collect the redemption price;

          (f)  that, unless the Company defaults in making such redemption 
payment, interest on Securities called for redemption ceases to accrue on and 
after the redemption date;

          (g)  the paragraph of the Securities and/or Section of 


<PAGE>
                                                                             46

this Indenture pursuant to which the Securities called for redemption are 
being redeemed, and, if the redemption is to occur pursuant to Section 3.7, a 
description of the transaction or transactions that constitute the Change of 
Control; and

          (h)  that no representation is made as to the correctness or 
accuracy of the CUSIP number, if any, listed in such notice or printed on the 
Securities.

          If any of the Securities to be redeemed is in the form of a Global 
Note, then such notice shall be modified in form but not substance to the 
extent appropriate to accord with the procedures of the Depositary applicable 
to redemptions.

          At the Company's request and expense, the Trustee shall give the 
notice of redemption in the Company's name; PROVIDED, HOWEVER, that the 
Company shall have delivered to the Trustee, at least 45 days prior to the 
redemption date, a notice signed by two officers requesting that the Trustee 
give such notice and setting forth the information to be stated in such 
notice as provided in the preceding paragraph.

          Section 3.4.  EFFECT OF NOTICE OF REDEMPTION.

          Once notice of redemption is mailed in accordance with Section 3.3
hereof, Securities called for redemption become irrevocably due and payable on
the redemption date at the redemption price.  A notice of redemption may not be
conditional.

          Section 3.5.  DEPOSIT OF REDEMPTION PRICE.

          Prior to 10:00 a.m. New York City time on any redemption date, the
Company shall deposit with the Trustee or with the Paying Agent money sufficient
to pay the redemption price of and accrued interest on all Securities to be
redeemed on that date.  The Trustee or the Paying Agent shall promptly return to
the Company any money deposited with the Trustee or the Paying Agent by the
Company in excess of the amounts necessary to pay the redemption price of and
accrued interest on, all Securities to be redeemed.

          If the Company complies with the provisions of the preceding 
paragraph, on and after the redemption date, interest shall cease to accrue 
on the Securities or the portions of Securities called for redemption.  If a 
Security is redeemed on or after an interest record date but on or prior to 
the related interest payment date, then any accrued and unpaid interest shall 
be paid to the Person in whose name such Security was registered at the close 
of business on such record date.  If any Security called for redemption shall 
not be so paid upon surrender for redemption because of the failure of the 
Company to comply with the preceding paragraph, interest shall be paid on the 
unpaid principal, from the redemption date until such principal is paid, and 
to the extent lawful on any interest not paid on such unpaid principal, in 
each case at the rate provided in the Securities and in Section 4.1 hereof.

<PAGE>
                                                                             47

          Section 3.6.  SECURITIES REDEEMED IN PART.

          Upon surrender of a Security that is redeemed in part, the Company 
shall issue and, upon the receipt of a written authentication order of the 
Company signed by two Officers of the Company, the Trustee shall authenticate 
for the Holder at the expense of the Company a new Security equal in 
principal amount to the unredeemed portion of the Security surrendered.

          Section 3.7.  OPTIONAL REDEMPTION.

          (a)  Except as set forth in clauses (b) and (c) of this Section 
3.7, the Company shall not have the option to redeem the Securities pursuant 
to this Section 3.7 prior to August 1, 2003.  From and after August 1, 2003, 
the Company shall have the option to redeem the Securities, in whole or in 
part, upon not less than 30 nor more than 60 days notice, at the redemption 
prices (expressed as percentages of principal amount) set forth below plus 
accrued and unpaid interest thereon to the applicable redemption date, if 
redeemed during the twelve-month period beginning on August 1 of each of the 
years indicated below:


<TABLE>
<CAPTION>
                                          Percentage of
     Year                               Principal Amount
     ----                               ----------------
     <S>                                    <C> 
     2003........................           105.125%

     2004........................           103.417%

     2005........................           101.708%
     
     2006 and thereafter.........           100.000%
</TABLE>

          (b)  Notwithstanding the provisions of clause (a) of this Section 
3.7, at any time prior to August 1, 2001, the Company may, at its option, on 
any one or more occasions, redeem up to 35% of the original aggregate 
principal amount of Securities at a redemption price of 110.25% of the 
principal amount thereof, plus accrued and unpaid interest, if any, thereon 
to the redemption date with all or a portion of the net proceeds of public 
sales of common stock of the Company (the "Common Stock"); PROVIDED that at 
least 65% of the original aggregate principal amount of Securities remains 
outstanding immediately after the occurrence of such redemption; and 
PROVIDED, FURTHER, that such redemption shall occur within 60 days of the 
date after the closing of the related sale of such Common Stock.

          (c)  Notwithstanding the provisions of clause (a) of this Section 
3.7, upon the occurrence of a Change of Control at any time on or prior to 
August 1, 2003, the Company may, at its option, redeem in whole but not in 
part, the Securities at a redemption price equal to 100% of the principal 
amount thereof, plus the Applicable Premium as of, and accrued but unpaid 
interest, if any, to, the date of redemption (the "Change of 


<PAGE>
                                                                             48

Control Redemption Payment") (subject to the right of Holders of record on 
the relevant record date to receive interest due on the relevant interest 
payment date) provided that such redemption shall be made no more than 90 
days after the occurrence of a Change of Control. Provided the Company 
complies with Section 3.3 and the other provisions hereof applicable to such 
redemption, a redemption pursuant to this Section 3.7(c) can occur 
simultaneously with the occurrence of a Change of Control. Notwithstanding 
any provision of Section 3.7(d), the Company shall notify the Trustee and, by 
mail, the Holders of the Securities of its decision to redeem the Securities 
pursuant to this Section 3.7(c) no later than 30 days after the occurrence of 
a Change of Control.

          (d)  Any redemption pursuant to this Section 3.7 shall be made 
pursuant to the provisions of Sections 3.1 through 3.6 hereof and, as to 
Section 3.7(c) only, pursuant to the provisions of Section 4.13.

          Section 3.8.  MANDATORY REDEMPTION.

          Except as set forth under Sections 4.10 and 4.13 hereof, the 
Company shall not be required to make mandatory redemption or sinking fund 
payments with respect to the Securities.

          Section 3.9.  OFFER TO PURCHASE BY APPLICATION OF EXCESS PROCEEDS.

          In the event that, pursuant to Section 4.10 hereof, the Company 
shall be required to commence an offer to all Holders of Securities and, to 
the extent required by the terms thereof, to all holders or lenders of other 
Pari Passu Indebtedness, to purchase Securities and any such Pari Passu 
Indebtedness (an "ASSET SALE OFFER"), it shall follow the procedures 
specified below.

          The Asset Sale Offer shall remain open for a period of 20 Business 
Days following its commencement and no longer, except to the extent that a 
longer period is required by applicable law (the "OFFER PERIOD").  No later 
than five Business Days after the termination of the Offer Period (the 
"PURCHASE DATE"), the Company shall purchase the principal amount of 
Securities required to be purchased pursuant to Section 4.10 hereof, giving 
effect to any related offer for Pari Passu Indebtedness pursuant to Section 
4.10, (the "OFFER AMOUNT") or, if less than the Offer Amount has been 
tendered, all Securities tendered in response to the Asset Sale Offer.  
Payment for any Securities so purchased shall be made in the same manner as 
interest payments are made.

          If the Purchase Date is on or after an interest record date and on 
or before the related interest payment date, any accrued and unpaid interest 
shall be paid to the Person in whose name a Security is registered at the 
close of business on such record date, and no additional interest shall be 
payable to 



<PAGE>
                                                                             49

Holders who tender Securities pursuant to the Asset Sale Offer.

          Upon the commencement of an Asset Sale Offer, the Company shall 
send, by first class mail, a notice to the Trustee and each of the Holders.  
The notice shall contain all instructions and materials necessary to enable 
such Holders to tender Securities pursuant to the Asset Sale Offer.  The 
Asset Sale Offer shall be made to all Holders.  The notice, which shall 
govern the terms of the Asset Sale Offer, shall state:

          (a)  that the Asset Sale Offer is being made pursuant to this Section
     3.9 and Section 4.10 hereof and the length of time the Asset Sale Offer
     shall remain open;

          (b)  the Offer Amount, the purchase price and the Purchase Date;

          (c)  that any Security not tendered or accepted for payment shall
     continue to accrue interest;

          (d)  that, unless the Company defaults in making such payment, any
     Security accepted for payment pursuant to the Asset Sale Offer shall cease
     to accrue interest after the Purchase Date;

          (e)  that Holders electing to have a Security purchased pursuant to an
     Asset Sale Offer may only elect to have all of such Security purchased and
     may not elect to have only a portion of such Security purchased;

          (f)  that Holders electing to have a Security purchased pursuant to
     any Asset Sale Offer shall be required to surrender the Security, with the
     form entitled "OPTION OF HOLDER TO ELECT PURCHASE" on the reverse of the
     Security completed, or transfer by book-entry transfer, to the Company, a
     Depositary, if appointed by the Company, or a Paying Agent at the address
     specified in the notice at least three Business Days before the Purchase
     Date;

          (g)  that Holders shall be entitled to withdraw their election if the
     Company, the Depositary or the Paying Agent, as the case may be, receives,
     not later than the expiration of the Offer Period, a telegram, telex,
     facsimile transmission or letter setting forth the name of the Holder, the
     principal amount of the Security the Holder delivered for purchase and a
     statement that such Holder is withdrawing his election to have such
     Security purchased;

          (h)  that, if the aggregate principal amount of Securities surrendered
     by Holders exceeds the Offer Amount, the Company shall select the
     Securities to be purchased on a PRO RATA basis (with such adjustments as
     may be deemed appropriate by the Company so that only Securities in
     denominations of $1,000, or integral multiples thereof, shall be purchased)
     in the manner provided in Section 4.10; 


<PAGE>
                                                                            50

     and

          (i)  that Holders whose Securities were purchased only in part shall
     be issued new Securities equal in principal amount to the unpurchased
     portion of the Securities surrendered (or transferred by book-entry
     transfer).

          If any of the Securities subject to an Asset Sale Offer is in the 
form of a Global Note, then such notice may be modified in form but not 
substance to the extent appropriate to accord with the procedures of the 
Depositary applicable to repurchases.

          On or before the Purchase Date, the Company shall, to the extent 
lawful, accept for payment, on a PRO RATA basis to the extent necessary, the 
Offer Amount of Securities or portions thereof tendered pursuant to the Asset 
Sale Offer, or if less than the Offer Amount has been tendered, all 
Securities tendered, and shall deliver to the Trustee an Officers' 
Certificate stating that such Securities or portions thereof were accepted 
for payment by the Company in accordance with the terms of this Section 3.9.  
The Company, the Depositary or the Paying Agent, as the case may be, shall 
promptly (but in any case not later than five days after the Purchase Date) 
mail or deliver to each tendering Holder an amount equal to the purchase 
price of the Securities tendered by such Holder and accepted by the Company 
for purchase, and the Company shall promptly issue a new Security, and the 
Trustee, upon receipt of a written authentication order of the Company signed 
by two Officers of the Company, shall authenticate and mail or deliver such 
new Security to such Holder, in a principal amount equal to any unpurchased 
portion of the Security surrendered.  Any Security not so accepted shall be 
promptly mailed or delivered by the Company to the Holder thereof.  The 
Company shall publicly announce the results of the Asset Sale Offer on the 
Purchase Date.

          Other than as specifically provided in this Section 3.9, any 
purchase pursuant to this Section 3.9 shall be made pursuant to the 
provisions of Sections 3.1 through 3.6 hereof.


                                  ARTICLE 4
                                  COVENANTS

          Section 4.1.  PAYMENT OF SECURITIES.

          The Company shall pay or cause to be paid the principal of, 
premium, if any, and interest on the Securities on the dates and in the 
manner provided in the Securities.  Principal, premium, if any, and interest 
shall be considered paid on the date due if the Paying Agent, if other than 
the Company or a Subsidiary thereof, holds as of 10:00 a.m. Eastern Time on 
the due date money deposited by the Company in immediately available funds 
and designated for and sufficient to pay all such amounts then due.  

          The Company shall pay interest (including post-petition 

<PAGE>
                                                                            51

interest in any proceeding under any Bankruptcy Law) on overdue principal at 
the rate equal to 1% per annum in excess of the then applicable interest rate 
on the Securities to the extent lawful; it shall pay interest (including 
post-petition interest in any proceeding under any Bankruptcy Law) on overdue 
installments of interest (without regard to any applicable grace period) at 
the same rate to the extent lawful.

          Section 4.2.  MAINTENANCE OF OFFICE OR AGENCY.

          The Company shall maintain in the Borough of Manhattan, The City of 
New York, an office or agency (which may be an office of the Trustee or an 
affiliate of the Trustee, Registrar or co-registrar) where principal, 
premium, if any, and interest on the Securities will be paid and where 
Securities may be surrendered for registration of transfer or for exchange 
and where notices and demands to or upon the Company in respect of the 
Securities and this Indenture may be served.  The Company shall give prompt 
written notice to the Trustee of the location, and any change in the 
location, of such office or agency.  If at any time the Company shall fail to 
maintain any such required office or agency or shall fail to furnish the 
Trustee with the address thereof, such presentations, surrenders, notices and 
demands may be made or served at the Corporate Trust Office of the Trustee.

          The Company may also from time to time designate one or more other 
offices or agencies where the Securities may be presented or surrendered for 
any or all such purposes and may from time to time rescind such designations; 
PROVIDED, HOWEVER, that no such designation or rescission shall in any manner 
relieve the Company of its obligation to maintain an office or agency in the 
Borough of Manhattan, The City of New York for such purposes.  The Company 
shall give prompt written notice to the Trustee of any such designation or 
rescission and of any change in the location of any such other office or 
agency.

          The Company hereby designates the following office of an Affiliate 
of the Trustee as one such office or agency of the Company in accordance with 
Section 2.3: the Corporate Trust Office of the Trustee.

<PAGE>
                                                                            52

          Section 4.3.  COMMISSION REPORTS.

     Notwithstanding that the Company is not subject to the reporting 
requirements of Section 13 or 15(d) of the Exchange Act, the Company shall 
file with the Commission and, within 15 days after such filing, provide the 
Trustee and Holders and prospective Holders (upon request) with the annual 
reports and the information, documents and other reports which are specified 
in Sections 13 and 15(d) of the Exchange Act (but without exhibits in the 
case of the Holders and prospective Holders).  In the event that the Company 
is not permitted to file such reports, documents and information with the 
Commission, the Company will provide substantially similar information to the 
Trustee, the Holders and prospective Holders as if the Company were subject 
to the reporting requirements of Section 13 or 15(d) of the Exchange Act 
within 15 days of the date the Company would have been obligated to file such 
reports with the Commission, were the Company permitted to file such reports 
with the Commission.  The Company also will comply with the other provisions 
of Section 314(a) of the Trust Indenture Act.

          Section 4.4.  COMPLIANCE CERTIFICATE.

          (a)  The Company shall deliver to the Trustee, within 90 days after 
the end of each fiscal year, an Officers' Certificate stating that a review 
of the activities of the Company and its Subsidiaries during the preceding 
fiscal year has been made under the supervision of the signing Officers with 
a view to determining whether the Company has kept, observed, performed and 
fulfilled its obligations under this Indenture, and further stating, as to 
each such Officer signing such certificate, that to the best of his or her 
knowledge the Company has kept, observed, performed and fulfilled each and 
every covenant contained in this Indenture and is not in default in the 
performance or observance of any of the terms, provisions and conditions of 
this Indenture (or, if a Default or Event of Default shall have occurred, 
describing all such Defaults or Events of Default of which he or she may have 
knowledge and what action the Company is taking or proposes to take with 
respect thereto) and that to the best of his or her knowledge no event has 
occurred and remains in existence by reason of which payments on account of 
the principal of, premium, if any, or interest on the Securities is 
prohibited or if such event has occurred, a description of the event and what 
action the Company is taking or proposes to take with respect thereto.  As of 
the date hereof, the Company's fiscal year ends on December 31 of each 
calendar year.  In the event the Company changes its fiscal year, it shall 
promptly notify the Trustee of such change.

          (b)  So long as not contrary to the then current recommendations of 
the American Institute of Certified Public Accountants, the fiscal year-end 
financial statements delivered pursuant to Section 4.3 above shall be 
accompanied by a written statement of the Company's independent public 
accountants (who shall be a firm of established national reputation) that in 

<PAGE>
                                                                            53

making the examination necessary for certification of such financial 
statements, nothing has come to their attention that would lead them to 
believe that the Company has violated any provisions of Article 4 or Article 
5 hereof or, if any such violation has occurred, specifying the nature and 
period of existence thereof, it being understood that such accountants shall 
not be liable directly or indirectly to any Person for any failure to obtain 
knowledge of any such violation.

          (c)  The Company shall, so long as any of the Securities are 
outstanding, deliver to the Trustee, within five Business Days of any Officer 
becoming aware of any Default or Event of Default, a certificate of two 
officers specifying such Default or Event of Default and what action the 
Company is taking or proposes to take with respect thereto.

          Section 4.5.  TAXES.

          The Company shall pay, and shall cause each of its Subsidiaries to 
pay, prior to delinquency all material taxes, assessments, and governmental 
levies except such as are contested in good faith and by appropriate 
proceedings or where the failure to effect such payment is not adverse in any 
material respect to the Holders of the Securities.

          Section 4.6.  STAY, EXTENSION AND USURY LAWS.

          Each of the Company and the Subsidiary Guarantors covenants (to the 
extent that it may lawfully do so) that it shall not at any time insist upon, 
plead, or in any manner whatsoever claim or take the benefit or advantage of, 
any stay, extension or usury law wherever enacted, now or at any time 
hereafter in force, that may affect the covenants or the performance of this 
Indenture; and each of the Company and the Subsidiary Guarantors (to the 
extent that it may lawfully do so) hereby expressly waives all benefit or 
advantage of any such law, and covenants that it shall not, by resort to any 
such law, hinder, delay or impede the execution of any power herein granted 
to the Trustee, but shall suffer and permit the execution of every such power 
as though no such law has been enacted.

<PAGE>
                                                                            54

          Section 4.7.  RESTRICTED PAYMENTS.

          The Company shall not and shall not permit any of its Restricted 
Subsidiaries to, directly or indirectly:  (i) declare or pay any dividend or 
make any other payment or distribution on account of the Equity Interests of 
the Company or any Restricted Subsidiary (including, without limitation, any 
payment in connection with any merger or consolidation involving the Company) 
to the direct or indirect holders of Equity Interests of the Company or any 
Restricted Subsidiary in their capacity as such (other than dividends or 
distributions payable in Equity Interests of the Company or a Restricted 
Subsidiary (other than Disqualified Stock) and other than dividends or 
distributions payable to the Company or a Restricted Subsidiary so long as, 
in the case of any dividend or distribution payable on or in respect of any 
class or series of securities issued by a Subsidiary other than a Wholly 
Owned Restricted Subsidiary, the Company or a Restricted Subsidiary receives 
at least its pro rata share of such dividend or distribution in accordance 
with its Equity Interests in such class or series of securities); (ii) 
purchase, redeem or otherwise acquire or retire for value any Equity 
Interests of the Company or any Subsidiary of the Company that is not a 
Wholly Owned Restricted Subsidiary of the Company; (iii) make any principal 
payment on, or purchase, redeem, defease or otherwise acquire or retire for 
value any Indebtedness that is subordinated to the Securities, except at 
final maturity or as a mandatory or sinking fund repayment; or (iv) make any 
Restricted Investment (all such payments and other actions set forth in 
clauses (i) through (iv) above being collectively referred to as "Restricted 
Payments"), unless, at the time of and after giving effect to such Restricted 
Payment:

          (a)  no Default or Event of Default shall have occurred and be 
     continuing or would occur as a consequence thereof; and

          (b)  the Company would, at the time of such Restricted Payment and
     after giving pro forma effect thereto as if such Restricted Payment had
     been made at the beginning of the applicable four-quarter period, have been
     permitted to incur at least $1.00 of additional Indebtedness pursuant to
     the Fixed Charge Coverage Ratio test set forth in the first paragraph of
     Section 4.9 hereof; and

          (c)  such Restricted Payment, together with the aggregate of all other
     Restricted Payments made by the Company and its Restricted Subsidiaries
     after the date of this Indenture (excluding Restricted Payments permitted
     by clauses (1), (3), (4) and (6) of the next succeeding paragraph), is less
     than the sum of (i) 50% of the Consolidated Net Income of the Company for
     the period (taken as one accounting period) from the beginning of the first
     fiscal quarter commencing after the date of this Indenture to the end of
     the Company's most recently ended fiscal quarter for which internal
     financial statements are 

<PAGE>
                                                                            55

     available at the time of such Restricted Payment (or, if such 
     Consolidated Net Income for such period is a deficit, less 100% of such 
     deficit), PLUS (ii) 100% of the aggregate net cash proceeds received by 
     the Company from the issue or sale since the date of this Indenture of 
     Equity Interests of the Company or of debt securities of the Company 
     that have been converted into or exchanged for such Equity Interests 
     (other than Equity Interests (or convertible debt securities) sold to a 
     Subsidiary of the Company and other than Disqualified Stock or debt 
     securities that have been converted into Disqualified Stock), PLUS 
     (iii) to the extent that any Restricted Investment that was made after 
     the date of this Indenture is sold for cash or otherwise liquidated or 
     repaid for cash or the receipt of properties used in the Oil and Gas 
     Business, the lesser of (A) the net cash proceeds of such sale, 
     liquidation or repayment or the fair market value of property received 
     in exchange therefor and (B) the amount of such Restricted Investment; 
     PROVIDED, however, that the foregoing provisions of this paragraph (c) 
     will not prohibit Restricted Payments in an aggregate amount not to 
     exceed $15 million.

     The foregoing provisions shall not prohibit (1) the payment of any 
dividend within 60 days after the date of declaration thereof, if at said 
date of declaration such payment would have complied with the provisions of 
this Indenture; (2) the redemption, repurchase, retirement or other 
acquisition of any Equity Interests of the Company in exchange for, or out of 
the proceeds of, the substantially concurrent sale (other than to a 
Subsidiary of the Company) of other Equity Interests of the Company (other 
than any sale of Disqualified Stock); PROVIDED that the amount of any such 
net cash proceeds that are utilized for any such redemption, repurchase, 
retirement or other acquisition shall be excluded from clause (c)(ii) of the 
preceding paragraph; (3) the defeasance, redemption or repurchase of 
Subordinated Indebtedness with the net cash proceeds from an incurrence of 
subordinated Permitted Refinancing Debt or the substantially concurrent sale 
(other than to a Subsidiary of the Company) of Equity Interests (other than 
Disqualified Stock) of the Company; PROVIDED that the amount of any such net 
cash proceeds that are utilized for any such redemption, repurchase, 
retirement or other acquisition shall be excluded from clause (c)(ii) of the 
preceding paragraph; (4) the repurchase, redemption or other acquisition or 
retirement for value of any Equity Interests of the Company or any Subsidiary 
of the Company held by any of the Company's (or any of its Subsidiaries') 
employees pursuant to any management equity subscription agreement or stock 
option agreement in effect as of the date of this Indenture; PROVIDED that 
the aggregate price paid for all such repurchased, redeemed, acquired or 
retired Equity Interests shall not exceed $2.0 million in any twelve-month 
period; and PROVIDED FURTHER that no Default or Event of Default shall have 
occurred and be continuing immediately after such transaction; (5) 
repurchases of Equity Interests deemed to occur upon exercise of stock 
options if such Equity Interests represent a portion of 

<PAGE>
                                                                            56

the exercise price of such options; (6) the making of loans by the Company or 
any of its Restricted Subsidiaries to officers or directors of the Company; 
PROVIDED that the aggregate outstanding amount of such loans shall not 
exceed, at any time, $2.0 million plus any such loans outstanding on the date 
of this Indenture; and (7) during the period the Company is subject to 
Subchapter S of the Code, and after such period to the extent relating to the 
liability for such period, the making of payments or distributions or the 
payment of dividends in amounts equal to the amounts required for the 
Company's stockholders to pay Federal, state and local income taxes to the 
extent such income taxes are attributable to the taxable income of the 
Company.

     The amount of all Restricted Payments (other than cash) shall be the 
fair market value (as determined in good faith by a resolution of the Board 
of Directors set forth in a certificate of two officers delivered to the 
Trustee, which determination shall be conclusive evidence of compliance with 
this provision) on the date of the Restricted Payment of the asset(s) 
proposed to be transferred by the Company or the applicable Restricted 
Subsidiary, as the case may be, pursuant to the Restricted Payment.  Not 
later than five days after the date of making any Restricted Payment, the 
Company shall deliver to the Trustee an Officer's Certificate stating that 
such Restricted Payment is permitted and setting forth the basis upon which 
the calculations required by this Section 4.7 were computed.

     In computing Consolidated Net Income of the Company for purposes of this 
Section 4.7, (1) the Company shall use audited financial statements for the 
portions of the relevant period for which audited financial statements are 
available on the date of determination and unaudited financial statements and 
other current financial data based on the books and records of the Company 
for the remaining portion of such period and (2) the Company shall be 
permitted to rely in good faith on the financial statements and other 
financial data derived from the books and records of the Company that are 
available on the date of determination.  If the Company makes a Restricted 
Payment which, at the time of the making of such Restricted Payment, would on 
the good faith determination of the Company be permitted under the 
requirements of this Indenture, such Restricted Payment shall be deemed to 
have been made in compliance with this Indenture notwithstanding any 
subsequent adjustments made in good faith to the Company's financial 
statements affecting Consolidated Net Income of the Company for any period.

          Section 4.8.  DIVIDEND AND OTHER PAYMENT RESTRICTIONS AFFECTING 
RESTRICTED SUBSIDIARIES.

     The Company shall not, and shall not permit any of its Restricted 
Subsidiaries to, directly or indirectly, create or otherwise cause or suffer 
to exist or become effective any encumbrance or restriction on the ability of 
any Restricted Subsidiary to (i)(x) pay dividends or make any other 
distributions to the Company or any of the Restricted Subsidiaries of the 
Company (1) on its Capital Stock or (2) with 

<PAGE>
                                                                            57

respect to any other interest or participation in, or measured by, its 
profits, or (y) pay any Indebtedness owed to the Company or any Restricted 
Subsidiaries of the Company, (ii) make loans or advances to the Company or 
any Restricted Subsidiaries of the Company or (iii) transfer any of its 
properties or assets to the Company or any Restricted Subsidiaries of the 
Company, except for such encumbrances or restrictions existing under or by 
reason of (a) the Existing Credit Facility as in effect as of the date of 
this Indenture, and any amendments, modifications, restatements, renewals, 
increases, supplements, refundings, replacements or refinancings thereof or 
any other Credit Facility, PROVIDED that such amendments, modifications, 
restatements, renewals, increases, supplements, refundings, replacements, 
refinancings or other Credit Facilities are no more restrictive with respect 
to such dividend and other payment restrictions than those contained in the 
Existing Credit Facility as in effect on the date of this Indenture, (b) this 
Indenture and the Securities, (c) applicable law, (d) any instrument 
governing Indebtedness or Capital Stock of a Person acquired by the Company 
or any of its Restricted Subsidiaries as in effect at the time of such 
acquisition (except, in the case of Indebtedness, to the extent such 
Indebtedness was incurred in connection with or in contemplation of such 
acquisition), which encumbrance or restriction is not applicable to any 
Person, or the properties or assets of any Person, other than the Person and 
its Subsidiaries, or the property or assets of the Person and its 
Subsidiaries, so acquired, PROVIDED that, such Indebtedness or Capital Stock 
was permitted by the terms of this Indenture to be incurred, (e) by reason of 
customary non-assignment provisions in leases entered into in the ordinary 
course of business, (f) purchase money obligations for property acquired in 
the ordinary course of business that impose restrictions of the nature 
described in clause (iii) above on the property so acquired, (g) Permitted 
Refinancing Debt, PROVIDED that the restrictions contained in the agreements 
governing such Permitted Refinancing Debt are no more restrictive than those 
contained in the agreements governing the Indebtedness being refinanced, or 
(h) any other security agreement, instrument or document relating to Senior 
Debt hereafter in effect, provided that such encumbrances or restrictions are 
customary in connection with such documents and that the terms and conditions 
of such encumbrances or restrictions are no more restrictive than those 
encumbrances or restrictions imposed in connection with the Existing Credit 
Facility, (i) Permitted Liens, (j) customary provisions in joint venture 
agreements and other similar agreements relating to the distribution of 
revenues from such joint venture or other business venture, or (k) any 
agreement relating to a sale and leaseback transaction or capital lease, but 
only on the property subject to such transaction or lease and only to the 
extent that such restrictions or encumbrances are customary with respect to a 
sale and leaseback transaction or capital lease.

<PAGE>
                                                                            58

          Section 4.9.  INCURRENCE OF INDEBTEDNESS AND ISSUANCE OF 
DISQUALIFIED STOCK.

          The Company shall not, and shall not permit any of its Restricted 
Subsidiaries to, directly or indirectly, create, incur, issue, assume, 
guarantee or otherwise become directly or indirectly liable, contingently or 
otherwise, with respect to (collectively, "incur") any Indebtedness or issue 
any Disqualified Stock and the Company shall not permit any of its Restricted 
Subsidiaries to issue any shares of Disqualified Stock to any Person other 
than the Company or a Wholly-Owned Restricted Subsidiary of the Company; 
PROVIDED, HOWEVER, that the Company and any Subsidiary Guarantor may incur 
Indebtedness or issue shares of Disqualified Stock if:

               (i)  the Fixed Charge Coverage Ratio for the Company's most
     recently ended four full fiscal quarters for which internal financial
     statements are available immediately preceding the date on which such
     additional Indebtedness is incurred or such Disqualified Stock is issued
     would have been at least 2.5 to 1, determined on a pro forma basis as set
     forth in the definition of Fixed Charge Coverage Ratio; and

               (ii) no Default or Event of Default shall have occurred and be
     continuing at the time such additional Indebtedness is incurred or such
     Disqualified Stock is issued or would occur as a consequence of the
     incurrence of the additional Indebtedness or the issuance of the
     Disqualified Stock.

     Notwithstanding the foregoing, this Indenture shall not prohibit any of 
the following (collectively, "Permitted Indebtedness"):  (a) the Indebtedness 
evidenced by the Securities; (b) the incurrence by the Company or any of its 
Restricted Subsidiaries of Indebtedness pursuant to Credit Facilities, so 
long as the aggregate principal amount of all Indebtedness outstanding under 
all Credit Facilities does not, at any one time, exceed the greater of (i) 
$175 million and (ii) the Borrowing Base, provided that the Company may incur 
more than $175 million of Indebtedness pursuant to Credit Facilities only if 
the Fixed Charge Coverage Ratio for the Company's most recently ended four 
full fiscal quarters for which internal financial statements are available 
would have been at least 2.0 to 1, determined on a pro forma basis as set 
forth in the definition of Fixed Charge Coverage Ratio; (c) the guarantee by 
any Subsidiary Guarantor of any Indebtedness that is permitted by this 
Indenture to be incurred by the Company; (d) all Indebtedness of the Company 
and its Restricted Subsidiaries in existence as of the date of this 
Indenture; (e) intercompany Indebtedness between or among the Company and any 
of its Wholly Owned Restricted Subsidiaries; PROVIDED, HOWEVER, that if the 
Company is the obligor on such Indebtedness, (i) any subsequent issuance or 
transfer of Equity Interests that results in any such Indebtedness being held 
by a Person other than the Company or a Wholly Owned Restricted Subsidiary 
and (ii) any sale or other 

<PAGE>
                                                                            59

transfer of any such Indebtedness to a Person that is not either the Company 
or a Wholly Owned Restricted Subsidiary shall be deemed, in each case, to 
constitute an incurrence of such Indebtedness by the Company or such 
Restricted Subsidiary, as the case may be; (f) Indebtedness in connection 
with one or more standby letters of credit, guarantees, performance bonds or 
other reimbursement obligations, in each case, issued in the ordinary course 
of business and not in connection with the borrowing of money or the 
obtaining of advances or credit (other than advances or credit on open 
account, includible in current liabilities, for goods and services in the 
ordinary course of business and on terms and conditions which are customary 
in the Oil and Gas Business, and other than the extension of credit 
represented by such letter of credit, guarantee or performance bond itself), 
not to exceed in the aggregate at any given time 5.0% of Total Assets; (g) 
Indebtedness under Interest Rate Hedging Agreements entered into for the 
purpose of limiting interest rate risks, PROVIDED that the obligations under 
such agreements are related to payment obligations on Indebtedness otherwise 
permitted by the terms of this covenant and that the aggregate notional 
principal amount of such agreements does not exceed 105% of the principal 
amount of the Indebtedness to which such agreements relate; (h) Indebtedness 
under Oil and Gas Hedging Contracts, PROVIDED that such contracts were 
entered into in the ordinary course of business for the purpose of limiting 
risks that arise in the ordinary course of business of the Company and its 
Restricted Subsidiaries; (i) the incurrence by the Company and its Restricted 
Subsidiaries of Indebtedness not otherwise permitted to be incurred pursuant 
to this paragraph, PROVIDED that the aggregate principal amount of all 
Indebtedness incurred pursuant to this clause (i), together with all 
Permitted Refinancing Debt incurred pursuant to clause (j) of this paragraph 
in respect of Indebtedness previously incurred pursuant to this clause (i), 
does not exceed $20.0 million at any one time outstanding; (j) Permitted 
Refinancing Debt incurred in exchange for, or the net proceeds of which are 
used to refinance, extend, renew, replace, defease or refund, Indebtedness 
that was permitted by this Indenture to be incurred (including Indebtedness 
previously incurred pursuant to this clause (j), but excluding Indebtedness 
under clauses (b), (e), (f), (g), (h), (k), (l) and (m)); (k) accounts 
payable or other obligations of the Company or any Restricted Subsidiary to 
trade creditors created or assumed by the Company or such Restricted 
Subsidiary in the ordinary course of business in connection with the 
obtaining of goods or services; (l) Indebtedness consisting of obligations in 
respect of purchase price adjustments, guarantees or indemnities in 
connection with the acquisition or disposition of assets; (m) production 
imbalances occurring in the ordinary course of business that do not, at any 
one time outstanding, exceed 2% of the Total Assets of the Company; (n) rents 
and royalties due others incurred in the ordinary course of the Oil and Gas 
Business; and (o) Indebtedness of a Subsidiary Guarantor in respect of the 
Subsidiary Guarantee of such Subsidiary Guarantor.

          The Company shall not permit any Unrestricted 

<PAGE>
                                                                            60

Subsidiary to incur any Indebtedness other than Non-Recourse Debt; provided, 
however, if any such Indebtedness ceases to be Non-Recourse Debt, such event 
shall be deemed to constitute an incurrence of Indebtedness by the Company.  

          Section 4.10.  ASSET SALES.

          The Company shall not, and shall not permit any of its Restricted 
Subsidiaries to, engage in an Asset Sale unless (i) the Company or the 
Restricted Subsidiary, as the case may be, receives consideration at the time 
of such Asset Sale at least equal to the fair market value (as determined in 
good faith by a resolution of the Board of Directors set forth in an 
Officers' Certificate delivered to the Trustee, which determination shall be 
conclusive evidence of compliance with this provision) of the assets or 
Equity Interests issued or sold or otherwise disposed of and (ii) at least 
85% of the consideration therefor received by the Company or such Restricted 
Subsidiary from such Asset Sale is in the form of cash, Cash Equivalents, 
properties and capital assets to be used by the Company or any Restricted 
Subsidiary in the Oil and Gas Business or oil and gas properties owned or 
held by another Person which are to be used in the Oil and Gas Business of 
the Company or its Restricted Subsidiaries, or any combination thereof 
(collectively the "cash consideration"); PROVIDED that the amount of (x) any 
liabilities (as shown on the Company's or such Restricted Subsidiary's most 
recent balance sheet) of the Company or any Restricted Subsidiary (other than 
contingent liabilities and liabilities that are by their terms subordinated 
to the Securities or any guarantee thereof) that are assumed by the 
transferee of any such assets pursuant to a customary novation agreement that 
releases the Company or such Restricted Subsidiary from further liability and 
(y) any non-cash consideration received by the Company or any such Restricted 
Subsidiary from such transferee that are converted by the Company or such 
Restricted Subsidiary into cash within 180 days of closing such Asset Sale, 
shall be deemed to be cash for purposes of this provision (to the extent of 
the cash received); PROVIDED, HOWEVER, that the Company and its Restricted 
Subsidiaries may make Asset Sales with a fair market value not exceeding $10 
million in the aggregate in each fiscal year free from any of the 
restrictions, requirements or other provisions set forth in this Section 4.10.

     Within 360 days after the receipt of any Net Proceeds from an Asset 
Sale, the Company may apply such Net Proceeds, at its option, in any order or 
combination, (a) to reduce Senior Debt or Guarantor Senior Debt, (b) to make 
Permitted Investments, (c) to make investments in interests in other Oil and 
Gas Businesses or (d) to make capital expenditures in respect of the 
Company's or its Restricted Subsidiaries' Oil and Gas Business or to purchase 
long-term assets that are used or useful in the Oil and Gas Business.  
Pending the final application of any such Net Proceeds, the Company may 
temporarily reduce Senior Debt that is revolving debt or otherwise invest 
such Net Proceeds in any manner that is not prohibited by this Indenture.  
Any Net 

<PAGE>

                                                                              61

Proceeds from Asset Sales that are not applied as provided in the first 
sentence of this paragraph shall (after the expiration of the periods 
specified in this paragraph) be deemed to constitute "Excess Proceeds."

     When the aggregate amount of Excess Proceeds exceeds $15 million, the
Company shall make an Asset Sale Offer to purchase the maximum principal amount
of Securities and any other Pari Passu Indebtedness to which the Asset Sale
Offer applies that may be purchased out of the Excess Proceeds, at an offer
price in cash in an amount equal to, in the case of the Securities, 100% of the
principal amount thereof plus accrued and unpaid interest thereon to the date of
purchase or, in the case of any other Pari Passu Indebtedness, 100% of the
principal amount thereof (or with respect to discount Pari Passu Indebtedness,
the accrued value thereof) on the date of purchase, in each case, in accordance
with the procedures set forth in Section 3.9 hereof or the agreements governing
Pari Passu Indebtedness, as applicable.  To the extent that the aggregate
principal amount (or accreted value, as the case may be) of the Securities and
Pari Passu Indebtedness tendered pursuant to an Asset Sale Offer is less than
the Excess Proceeds, the Company may use any remaining Excess Proceeds for
general corporate purposes.  If the sum of (i) the aggregate principal amount of
Securities surrendered by Holders thereof, and (ii) the aggregate principal
amount or accreted value, as the case may be, of other Pari Passu Indebtedness
surrendered by holders or lenders thereof, exceeds the amount of Excess
Proceeds, the Trustee and the trustee or other lender representatives for the
Pari Passu Indebtedness shall select the Securities and other Pari Passu
Indebtedness to be purchased on a pro rata basis, based on the aggregate
principal amount (or accreted value, as applicable) thereof surrendered in such
Asset Sale Offer.  Upon completion of such Asset Sale Offer, Excess Proceeds
shall be reset at zero.

          Section 4.11.  TRANSACTIONS WITH AFFILIATES.

          The Company shall not, and shall not permit any of its Subsidiaries
to, make any payment to, or sell, lease, transfer or otherwise dispose of any of
its properties or assets to, or purchase any property or assets from, or enter
into or make or amend any contract, agreement, understanding, loan, advance or
guarantee with, or for the benefit of, any of its Affiliates (each of the
foregoing, an "Affiliate Transaction"), unless (i) such Affiliate Transaction is
on terms that are no less favorable to the Company or the relevant Subsidiary
than those that would have been obtained in a comparable transaction by the
Company or such Subsidiary with an unrelated Person and (ii) the Company
delivers to the Trustee (a) with respect to any Affiliate Transaction or series
of related Affiliate Transactions involving aggregate consideration in excess of
$1.0 million but less than or equal to $5.0 million, an Officers' Certificate to
the Trustee certifying that such Affiliate Transaction complies with clause (i)
above, (b) with respect to any Affiliate Transaction or series of related
Affiliate Transactions involving aggregate consideration in excess of $5.0
million but less than or equal to

<PAGE>

                                                                              62

$10 million, a resolution of the Board of Directors set forth in an Officers' 
Certificate certifying that such Affiliate Transaction or series of related 
Affiliate Transactions complies with clause (i) above and that such Affiliate 
Transaction or series of related Affiliate Transactions has been approved in 
good faith by a majority of the members of the Board of Directors who have no 
financial interest in such Affiliate Transactions, which resolution shall be 
conclusive evidence of compliance with this provision and (c) with respect to 
any Affiliate Transaction or series of related Affiliate Transactions 
involving aggregate consideration in excess of $10 million, an Officer's 
Certificate as described in clause (b) above and an opinion as to the 
fairness to the Company or such Subsidiary of such Affiliate Transaction from 
a financial point of iew issued by an accounting, appraisal, engineering or 
investment banking firm of national standing (for purposes of this clause (c) 
such opinion and the resolution described in clause (b) above shall be 
conclusive evidence of compliance with this provision); PROVIDED that the 
following shall not be deemed Affiliate Transactions:  (1)  reasonable fees 
and compensation paid to (including issuances and grants of securities and 
stock options), and employment agreements and stock option and ownership 
plans for the benefit of, officers, directors, employees or consultants of 
the Company or any Restricted Subsidiary of the Company as determined in good 
faith by the Company's Board of Directors or senior management, (2) 
transactions contemplated by any employment agreement or other compensation 
plan or arrangement entered into by the Company or any of its Subsidiaries in 
the ordinary course of business and consistent with past practice of the 
Company or such Subsidiary, (3) transactions between or among the Company 
and/or its Restricted Subsidiaries, (4) Restricted Payments and Permitted 
Investments that are permitted by Section 4.7 and the definition of Permitted 
Investments, (5) indemnification payments made to officers, directors and 
employees of the Company or its Subsidiaries pursuant to charter, by-law, 
statutory or contractual provisions, (6) any contracts, agreements, 
understandings existing as of the date of this Indenture and (7) oil and gas 
leasehold acquisition, drilling, well servicing and leasehold operations 
services provided by or to any Affiliate in the ordinary course of the Oil 
and Gas Business on terms that are no less favorable to the Company or the 
relevant Restricted Subsidiary than those that would have been obtained in a 
comparable transaction by the Company or such Restricted Subsidiary with an 
unrelated Person.

          Section 4.12.  LIENS.

          The Company shall not, and shall not permit any of its Restricted
Subsidiaries to, create, incur, assume or otherwise cause or suffer to exist or
become effective any Lien securing Indebtedness of any kind (other than
Permitted Liens) upon any of its property or assets, now owned or hereafter
acquired, unless all payments under the Securities are secured by such Lien
prior to, or on an equal and ratable basis with, the Indebtedness so secured for
so long as such Indebtedness is secured by such Lien.

<PAGE>

                                                                              63

          Section 4.13.  OFFER TO REPURCHASE UPON CHANGE OF CONTROL.
          (a)  Upon the occurrence of a Change of Control, each Holder of the
Securities shall, unless the Company shall have elected to redeem the Securities
prior to August 1, 2003 pursuant to Section 3.7(c), have the right to require
the Company to repurchase all or any part (equal to $1,000 or an integral
multiple thereof) of such Holder's Securities pursuant to the offer described
below (the "CHANGE OF CONTROL OFFER") at an offer price in cash equal to 101% of
the aggregate principal amount of the Securities plus accrued and unpaid
interest if any, thereon to the date of purchase (the "CHANGE OF CONTROL
PAYMENT").  Within 30 days following any Change of Control, the Company shall
mail a notice to each Holder stating: (1) a description of the transaction or
transactions that constitute the Change of Control; (2) that the Change of
Control Offer is being made pursuant to this Section 4.13 and that all
Securities tendered shall be accepted for payment; (3) the purchase price and
the purchase date described below (the "CHANGE OF CONTROL PAYMENT DATE");
(4) that any Security not tendered shall continue to accrue interest, if any;
(5) that, unless the Company defaults in the payment of the Change of Control
Payment, all Securities accepted for payment pursuant to the Change of Control
Offer shall cease to accrue interest, if any, after the Change of Control
Payment Date; (6) that Holders electing to have any Securities purchased
pursuant to a Change of Control Offer shall be required to surrender the
Securities, with the form entitled "OPTION OF HOLDER TO ELECT PURCHASE" on the
reverse of the Securities completed, to the Paying Agent at the address
specified in the notice prior to the close of business on the third Business Day
preceding the Change of Control Payment Date; (7) that Holders shall be entitled
to withdraw their election if the Paying Agent receives, not later than the
close of business on the second Business Day preceding the Change of Control
Payment Date, a telegram, telex, facsimile transmission or letter setting forth
the name of the Holder, the principal amount of Securities delivered for
purchase, and a statement that such Holder is withdrawing his election to have
the Securities purchased; and (8) that Holders whose Securities are being
purchased only in part shall be issued new Securities equal in principal amount
to the unpurchased portion of the Securities surrendered, which unpurchased
portion must be equal to $1,000 in principal amount or an integral multiple
thereof.  The Company and each Subsidiary Guarantor shall comply with the
requirements of Rule 14e-1 under the Exchange Act and any other securities laws
and regulations thereunder to the extent such laws and regulations are
applicable to such party in connection with the repurchase of the Securities as
a result of a Change of Control.

          (b)  On a Business Day that is no earlier than 30 days nor later than
60 days from the date that the Company mails or causes to be mailed notice of
the Change of Control to the Holders (the "CHANGE OF CONTROL PAYMENT DATE"), the
Company shall, to the extent lawful, (i) accept for payment all

<PAGE>

                                                                              64

Securities or portions thereof properly tendered pursuant to the Change of 
Control Offer, (ii) deposit with the Paying Agent an amount equal to the 
Change of Control Payment in respect of all the Securities or portions 
thereof so tendered and (iii) deliver or cause to be delivered to the Trustee 
the Securities so accepted together with an Officers' Certificate stating the 
aggregate principal amount of such Securities or portions thereof being 
purchased by the Company.  The Paying Agent shall promptly mail to each 
Holder of the Securities so tendered the Change of Control Payment for such 
Securities, and the Trustee shall promptly authenticate and mail (or cause to 
be transferred by book entry) to each Holder a new Security equal in 
principal amount to any unpurchased portion of the Securities surrendered, if 
any; PROVIDED that each such new Security shall be in a principal amount of 
$1,000 or an integral multiple thereof.  The Company shall publicly 
announce the results of the Change of Control Offer on or as soon as 
practicable after the Change of Control Payment Date.

          (c)  Prior to complying with the provisions this Section 4.13, but in
any event within 30 days following a Change of Control, the Company shall either
repay all outstanding Senior Debt or obtain the requisite consents, if any,
under all agreements governing outstanding Senior Debt to permit the repurchase
of the Securities required by this Section 4.13.

          The Change of Control provisions described above shall be applicable
whether or not any other provisions of this Indenture are applicable.

          The Company shall not be required to make a Change of Control Offer if
a third party makes the Change of Control Offer in the manner, at the times and
otherwise in compliance with the requirements set forth in this Section 4.13 and
purchases all Securities (or portions thereof) validly tendered and not
withdrawn under such Change of Control Offer.  

          Section 4.14.  ADDITIONAL SUBSIDIARY GUARANTEES.

          In the event that the Company or any of its Restricted Subsidiaries
shall acquire or create another Restricted Subsidiary after the date of this
Indenture, the Company shall cause such newly acquired or created Restricted
Subsidiary to execute and deliver to the Trustee a Subsidiary Guarantee pursuant
to which such Restricted Subsidiary will guarantee, jointly and severally with
other Subsidiary Guarantors, to the Holders and the Trustee, subject to
subordination provisions in Article 10, the full and prompt payment of the
Securities in accordance with Article 11 and become a party to the Indenture. 

<PAGE>

                                                                              65

          Section 4.15.  CORPORATE EXISTENCE.

          Subject to Article 5 hereof, the Company and the Subsidiaries shall do
or cause to be done all things necessary to preserve and keep in full force and
effect (i) its corporate existence, and the corporate, partnership or other
existence of each of the Subsidiaries, in accordance with the respective
organizational documents (as the same may be amended from time to time) of the
Company or any such Subsidiary and (ii) the rights (charter, partnership
agreement and statutory), licenses and franchises of the Company and the
Subsidiaries; PROVIDED, HOWEVER, that the Company and the Subsidiaries shall not
be required to preserve any such right, license or franchise, or the corporate,
partnership or other existence of any of the Subsidiaries, if the Board of
Directors of the relevant Person shall determine that the preservation thereof
is no longer desirable in the conduct of the business of the Company and the
Subsidiaries, taken as a whole, and that the loss thereof is not adverse in any
material respect to the Holders of the Securities.

          Section 4.16.  NO LAYERING.

          Notwithstanding the provisions of Section 4.9 hereof, (i) the Company
shall not incur, create, issue, assume, guarantee or otherwise become liable for
any Indebtedness that is subordinate or junior in right of payment to any Senior
Debt of the Company and senior in any respect in right of payment to the
Securities and (ii) the Subsidiary Guarantors shall not directly or indirectly
incur, create, issue, assume, guarantee or otherwise become liable for any
Indebtedness that is subordinate or junior in right of payment to Guarantor
Senior Debt and senior in any respect in right of payment to the Subsidiary
Guarantees; PROVIDED, HOWEVER, that the foregoing limitations shall not apply to
distinctions between categories of Indebtedness that exist by reason of any
Liens arising or created in respect of some but not all such Indebtedness.

          Section 4.17.  BUSINESS ACTIVITIES.

          The Company shall not, and shall not permit any Restricted Subsidiary
to, engage in any material respect in any business other than the Oil and Gas
Business.

          Section 4.18.  SALE AND LEASEBACK TRANSACTIONS.

          The Company will not, and will not permit any of its Restricted
Subsidiaries to, enter into any sale and leaseback transaction; PROVIDED that
the Company or its Restricted Subsidiaries may enter into a sale and leaseback
transaction if (i) the Company could have incurred Indebtedness in an amount
equal to the Attributable Debt relating to such sale and leaseback transaction
pursuant to the first paragraph of Section 4.9 or (ii) the gross cash proceeds
of such sale and leaseback transaction are at least equal to the fair market
value (as determined in good faith by a resolution of the Board of

<PAGE>

                                                                              66

Directors set forth in an Officers' Certificate delivered to the Trustee) of 
the property that is subject to such sale and leaseback transaction and the 
transfer of assets in such sale and leaseback transaction is permitted by, 
and the Company applies the net proceeds of such transaction in compliance 
with, the provisions of Section 4.10. 

          Section 4.19.  DESIGNATION OF UNRESTRICTED SUBSIDIARIES.

          The Board of Directors of the Company may designate any Restricted
Subsidiary to be an Unrestricted Subsidiary if such designation would not cause
a Default.  For purposes of making such determination, all outstanding
Investments by the Company and its Restricted Subsidiaries (except to the extent
repaid in cash) in the Subsidiary so designated shall be deemed to be Restricted
Payments at the time of such designation and shall reduce the amount available
for Restricted Payments under clause (c) of the first paragraph of Section 4.7. 
All such outstanding Investments shall be deemed to constitute Investments in an
amount equal to the greater of the fair market value or the book value of such
Investments at the time of such designation.  Such designation shall only be
permitted if such Restricted Payment would be permitted at such time and if such
Restricted Subsidiary otherwise meets the definition of an Unrestricted
Subsidiary.


                                      ARTICLE 5
                                      SUCCESSORS

          Section 5.1.  MERGER, CONSOLIDATION, OR SALE OF SUBSTANTIALLY ALL
ASSETS.


          The Company shall not consolidate or merge with or into (whether or
not the Company is the surviving corporation), or sell, assign, transfer, lease,
convey or otherwise dispose of all or substantially all of its properties or
assets, in one or more related transactions, to another Person, and the Company
may not permit any of its Restricted Subsidiaries to enter into any such
transaction or series of transactions if such transaction or series of
transactions would, in the aggregate, result in a sale, assignment, transfer,
lease, conveyance, or other disposition of all or substantially all of the
properties or assets of the Company to another Person, in either case unless (i)
the Company is the surviving corporation or the Person formed by or surviving
any such consolidation or merger (if other than the Company) or to which such
sale, assignment, transfer, lease, conveyance or other disposition shall have
been made (the "Surviving Entity") is a corporation organized or existing under
the laws of the United States, any state thereof or the District of Columbia;
(ii) the Surviving Entity (if the Company is not the continuing obligor under
this Indenture) assumes all the obligations of the Company under the Securities
and this Indenture pursuant to a supplemental indenture in a form reasonably
satisfactory to the Trustee; (iii) immediately before and after giving effect to
such

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                                                                              67

transaction or series of transactions no Default or Event of Default exists; 
(iv) immediately after giving effect to such transaction or series of 
transactions on a pro forma basis (and treating any Indebtedness not 
previously an obligation of the Company or any of its Restricted Subsidiaries 
which becomes the obligation of the Company or any of its Restricted 
Subsidiaries as a result of such transaction or series of transactions as 
having been incurred at the time of such transaction or series of 
transactions), the Consolidated Net Worth of the Company (if the Company is 
not the continuing obligor under this Indenture) is equal to or greater han 
the Consolidated Net Worth of the Company immediately prior to such 
transaction or series of transactions and (v) the Company or Surviving Entity 
(if the Company is not the continuing obligor under this Indenture) will, at 
the time of such transaction or series of transactions and after giving pro 
forma effect thereto as if such transaction or series of transactions had 
occurred at the beginning of the applicable four-quarter period, be permitted 
to incur at least $1.00 of additional Indebtedness pursuant to the test set 
forth in the first paragraph of Section 4.9 hereof.  Each Subsidiary 
Guarantor, if any, unless it is the other party to the transactions described 
above, shall have confirmed by supplemental indenture that its Subsidiary 
Guarantee shall apply to such Person's obligations under the Indenture and 
the Securities. Notwithstanding the foregoing clauses (iv) and (v), any 
Restricted Subsidiary may consolidate with, merge into or transfer all or 
part of its properties and assets to the Company, and any Wholly Owned 
Restricted Subsidiary may consolidate with, merge into or transfer all or 
part of its properties and assets to another Wholly Owned Restricted 
Subsidiary.  

          None of the provisions of this Section 5.1 shall be deemed to prevent
the merger of the Company with an Affiliate incorporated solely for the purpose
of reincorporating the Company in another jurisdiction.  This Section 5.1 shall
not apply to any consolidation, merger, sale, assignment, transfer, lease or
other disposition if the Company shall have elected to redeem the Securities
pursuant to Section 3.7 and such redemption takes place prior to or
simultaneously with the Company's consolidation or merger with or into another
Person.

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                                                                              68

          Section 5.2.  SUCCESSOR CORPORATION SUBSTITUTED; SUBSIDIARY GUARANTORS
CONFIRMED.

          (a)  Upon any consolidation or merger, or any sale, assignment,
transfer, lease, conveyance or other disposition of all or substantially all of
the assets of the Company in accordance with Section 5.1 hereof, the Surviving
Entity shall succeed to, and be substituted for (so that from and after the date
of such consolidation, merger, sale, lease, conveyance or other disposition, the
provisions of this Indenture referring to the "COMPANY" shall refer instead to
the Surviving Entity and not to the Company), and may exercise every right and
power of the Company under this Indenture with the same effect as if such
successor Person had been named as the Company herein; PROVIDED, HOWEVER, that
the predecessor Company shall not be relieved from the obligation to pay the
principal of and interest on the Securities except in the case of a sale of all
of the Company's assets that meets the requirements of Section 5.1 hereof.

          (b)  Upon any consolidation or merger, or any sale, assignment,
transfer, lease conveyance or other disposition of all or substantially all of
the assets of the Company in accordance with Section 5.1 hereof, each Subsidiary
Guarantor (unless such Subsidiary Guarantor is the Surviving Entity) shall
confirm by executing a supplemental indenture that its Subsidiary Guarantee
guarantees the Surviving Entity's Obligations under this Indenture and the
Securities.


                                      ARTICLE 6
                                DEFAULTS AND REMEDIES

          Section 6.1.  EVENTS OF DEFAULT.

          An "EVENT OF DEFAULT" occurs if:

          (1)  the Company defaults in the payment of interest, if any, on the
     Securities when the same becomes due and payable and the Default continues
     for a period of 30 consecutive days, whether or not such payment is
     prohibited by the provisions of Article 10 hereof;

          (2)  the Company defaults in the payment of the principal of or
     premium, if any, on the Securities, whether or not such payment is
     prohibited by the provisions of Article 10 hereof;

          (3)  the Company or a Subsidiary Guarantor fails to observe or perform
     any covenant, condition or agreement on the part of the Company or a
     Subsidiary Guarantor to be observed or performed pursuant to Article 5
     hereof;

          (4)  the Company fails to observe or perform any covenant, condition
     or agreement on the part of the Company to be observed or performed
     pursuant to Sections 4.3, 4.7,

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                                                                              69

     4.8, 4.9, 4.10, 4.11, 4.12, 4.13, 4.14, 4.16, 4.17, 4.18 and 4.19 hereof
     and the Default continues for the period and after the notice specified
     below;

          (5)  the Company fails to comply with any of its other agreements or
     covenants in, or provisions of, the Securities or this Indenture and the
     Default continues for 60 consecutive days after the notice specified below;

          (6)  except as permitted herein, any Subsidiary Guarantee shall be
     held in any judicial proceeding to be unenforceable or invalid or shall
     cease for any reason to be in full force and effect or a Subsidiary
     Guarantor, or any Person acting on behalf of a Subsidiary Guarantor, shall
     deny or disaffirm such Subsidiary Guarantor's obligation under its
     Subsidiary Guarantee; 

          (7)  a default occurs under any mortgage, indenture or instrument
     under which there may be issued or by which there may be secured or
     evidenced any Indebtedness for money borrowed by the Company or any of its
     Restricted Subsidiaries (or the payment of which is guaranteed by the
     Company or any of its Restricted Subsidiaries), whether such Indebtedness
     or guarantee now exists or shall be created hereafter, which default (a) is
     caused by a failure to pay principal of such Indebtedness prior to the
     expiration of the grace period provided in such Indebtedness on the date of
     such default (a "PAYMENT DEFAULT") or (b) results in the acceleration of
     such Indebtedness prior to its express maturity and, in each case, the
     principal amount of any such Indebtedness, together with the principal
     amount of any other such Indebtedness under which there is then existing a
     Payment Default or the maturity of which has been so accelerated,
     aggregates $10 million or more;

          (8)  a final non-appealable judgment or order or final non-appealable
     judgments or orders are rendered against the Company or any Restricted
     Subsidiary that remain unpaid or discharged for a period of 60 consecutive
     days and that require the payment of money, either individually or in an
     aggregate amount, in excess of $10 million;

          (9)  the Company or any Restricted Subsidiary pursuant to or within
     the meaning of any Bankruptcy Law:

               (a)  commences a voluntary case or proceeding,

               (b)  consents to the entry of an order for relief against it in
     an involuntary case or proceeding,

               (c)  consents to the appointment of a Note Custodian of it or for
     all or substantially all of its property or

               (d)  makes a general assignment for the benefit of its creditors;

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                                                                              70

          (10)  a court of competent jurisdiction enters an order or decree
     under any Bankruptcy Law that:

               (a)  is for relief against the Company or any Restricted
     Subsidiary in an involuntary case or proceeding,

               (b)  appoints a Custodian of the Company, any Restricted
     Subsidiary or for all or substantially all of the property of the Company
     or any Restricted Subsidiary or 

               (c)  orders the liquidation of the Company or any Restricted
     Subsidiary 

     and in each case the order or decree remains unstayed and in effect for 60
     consecutive days.

          The term "CUSTODIAN" means any receiver, trustee, assignee, liquidator
or similar official under any Bankruptcy Law.

           A Default under clause (4) is not an Event of Default until the
Trustee notifies the Company, or the Holders of at least 25% in aggregate
principal amount of the then outstanding Securities notify the Company and the
Trustee, of the Default and the Company does not cure the Default within 30
consecutive days after receipt of the notice.  A Default under clause (5) is not
an Event of Default until the Trustee notifies the Company, or the Holders of at
least 25% in aggregate principal amount of the then outstanding Securities
notify the Company and the Trustee, of the Default and the Company does not cure
the Default within 60 consecutive days after receipt of the notice.  Each notice
must specify the Default, demand that it be remedied and state that the notice
is a "NOTICE OF DEFAULT."


<PAGE>
                                                                              71

          Section 6.2.  ACCELERATION.

          If an Event of Default (other than an Event of Default specified in
clauses (9) and (10) of Section 6.1 hereof) occurs and is continuing, the
Trustee by notice to the Company, or the Holders of at least 25% in aggregate
principal amount of the then outstanding Securities by written notice to the
Company and the Trustee, may declare the unpaid principal amount of and any
accrued and unpaid interest on all the Securities to be due and payable
immediately.  If payment of the Securities is accelerated because of an Event of
Default, the Company or the Trustee shall notify the holders of Designated
Senior Debt of such acceleration.  Upon such declaration the principal and
interest shall be due and payable immediately; PROVIDED, HOWEVER, that so long
as any Designated Senior Debt or any commitment therefor is outstanding, any
such notice or declaration shall not become effective until the earlier of
(a) five Business Days after such notice is delivered to the representative for
the Designated Senior Debt or (b) the acceleration of any Designated Senior Debt
and thereafter, payments on the Securities pursuant to this Article 6 shall be
made only to the extent permitted pursuant to Article 10 herein. 
Notwithstanding the foregoing, if any Event of Default specified in clause (9)
or (10) of Section 6.1 hereof relating to the Company or any Restricted
Subsidiary occurs, such an amount shall IPSO FACTO become and be immediately due
and payable without any declaration or other act or notice on the part of the
Trustee or any Holder.  

          After a declaration of acceleration under this Indenture, but before a
judgment or decree for payment of principal, premium, if any, and interest on
the Securities due under this Article 6 has been obtained by the Trustee,
Holders of a majority in aggregate principal amount of the then outstanding
Securities by written notice to the Company and the Trustee may rescind an
acceleration and its consequences if (i) the Company or any Subsidiary Guarantor
has paid or deposited with the Trustee a sum sufficient to pay (a) all sums paid
or advanced by the Trustee under this Indenture and the reasonable compensation,
expenses, disbursements and advances of the Trustee, its agents and counsel and
(b) all overdue interest on the Securities, if any, (ii) the rescission would
not conflict with any judgment or decree of a court of competent jurisdiction
and (iii) all existing Events of Default (except nonpayment of principal,
premium, if any, or interest that has become due solely because of the
acceleration) have been cured or waived.

          Section 6.3.  OTHER REMEDIES.

          If an Event of Default occurs and is continuing, the Trustee may
pursue any available remedy to collect the payment of principal, premium, if
any, and interest on the Securities or to enforce the performance of any
provision of the Securities or this Indenture.

          The Trustee may maintain a proceeding even if it does

<PAGE>

                                                                              72

not possess any of the Securities or does not produce any of them in the 
proceeding.  A delay or omission by the Trustee or any Holder of a Security 
in exercising any right or remedy accruing upon an Event of Default shall not 
impair the right or remedy or constitute a waiver of or acquiescence in the 
Event of Default.  All remedies are cumulative to the extent permitted by law.

          Section 6.4.  WAIVER OF PAST DEFAULTS.

          Holders of not less than a majority in aggregate principal amount of
the Securities then outstanding by notice to the Trustee may on behalf of the
Holders of all of the Securities waive an existing Default or Event of Default
and its consequences hereunder, except a continuing Default or Event of Default
in the payment of principal of, premium and liquidated damages, if any, or
interest on, the Securities (including in connection with an offer to purchase)
(PROVIDED, HOWEVER, that the Holders of a majority in aggregate principal amount
of the then outstanding Securities may rescind an acceleration and its
consequences, including any related payment default that resulted from such
acceleration).  Upon any such waiver, such Default shall cease to exist, and any
Event of Default arising therefrom shall be deemed to have been cured for every
purpose of this Indenture; but no such waiver shall extend to any subsequent or
other Default or impair any right consequent thereon.

          Section 6.5.  CONTROL BY MAJORITY.

          Holders of a majority in aggregate principal amount of the then
outstanding Securities may direct the time, method and place of conducting any
proceeding for exercising any remedy available to the Trustee or exercising any
trust or power conferred on it.  However, the Trustee may refuse to follow any
direction that conflicts with law or this Indenture that the Trustee determines
may be unduly prejudicial to the rights of other Holders of Securities or that
may involve the Trustee in personal liability it being understood that (subject
to Section 7.1) the Trustee shall have no duty to ascertain whether or not such
actions or forebearances are unduly prejudicial to such holders.

          Section 6.6.  LIMITATION ON SUITS.

          A Holder of a Security may pursue a remedy with respect to this
Indenture or the Securities only if:

          (a)  the Holder of a Security gives to the Trustee written notice of a
     continuing Event of Default;

          (b)  the Holders of at least 25% in aggregate principal amount of the
     then outstanding Securities make a written request to the Trustee to pursue
     the remedy;

          (c)  such Holder of a Security or Holders of Securities offer and, if
     requested, provide to the Trustee indemnity satisfactory to the Trustee
     against any loss, liability or

<PAGE>

                                                                              73

      expense;

          (d)  the Trustee does not comply with the request within 60 days after
     receipt of the request and the offer and, if requested, the provision of
     indemnity; and

          (e)  during such 60-day period the Holders of a majority in aggregate
     principal amount of the then outstanding Securities do not give the Trustee
     a direction inconsistent with the request.

A Holder of a Security may not use this Indenture to prejudice the rights of
another Holder of a Security or to obtain a preference or priority over another
Holder of a Security.

          Section 6.7.  RIGHTS OF HOLDERS OF SECURITIES TO RECEIVE PAYMENT.

          Notwithstanding any other provision of this Indenture, the right of
any Holder of a Security to receive payment of principal, premium, if any, and
interest on the Security, on or after the respective due dates expressed in the
Security (including in connection with an offer to purchase), or to bring suit
for the enforcement of any such payment on or after such respective dates, shall
not be impaired or affected without the consent of such Holder.

          Section 6.8.  COLLECTION SUIT BY TRUSTEE.

          If an Event of Default specified in Section 6.1(1) or (2) occurs and
is continuing, the Trustee is authorized to recover judgment in its own name and
as trustee of an express trust against the Company or any Subsidiary Guarantor
for the whole amount of principal of, premium, if any, and interest remaining
unpaid on the Securities and interest on overdue principal and, to the extent
lawful, interest and such further amount as shall be sufficient to cover the
costs and expenses of collection, including the reasonable compensation,
expenses, disbursements and advances of the Trustee, its agents and counsel.

<PAGE>

                                                                              74

          Section 6.9.  TRUSTEE MAY FILE PROOFS OF CLAIM.

          The Trustee is authorized to file such proofs of claim and other
papers or documents as may be necessary or advisable in order to have the claims
of the Trustee (including any claim for the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel) and the
Holders of the Securities allowed in any judicial proceedings relative to the
Company or any of the Subsidiary Guarantors (or any other obligor upon the
Securities), its creditors or its property and shall be entitled and empowered
to collect, receive and distribute any money or other property payable or
deliverable on any such claims and any custodian in any such judicial proceeding
is hereby authorized by each Holder to make such payments to the Trustee, and in
the event that the Trustee shall consent to the making of such payments directly
to the Holders, to pay to the Trustee any amount due to it for the reasonable
compensation, expenses, disbursements and advances of the Trustee, its agents
and counsel, and any other amounts due the Trustee under Section 7.7 hereof.  To
the extent that the payment of any such compensation, expenses, disbursements
and advances of the Trustee, its agents and counsel, and any other amounts due
the Trustee under Section 7.7 hereof out of the estate in any such proceeding,
shall be denied for any reason, payment of the same shall be secured by a Lien
on, and shall be paid out of, any and all distributions, dividends, money,
securities and other properties that the Holders may be entitled to receive in
such proceeding whether in liquidation or under any plan of reorganization or
arrangement or otherwise.  Nothing herein contained shall be deemed to authorize
the Trustee to authorize or consent to or accept or adopt on behalf of any
Holder any plan of reorganization, arrangement, adjustment or composition
affecting the Securities or the rights of any Holder, or to authorize the
Trustee to vote in respect of the claim of any Holder in any such proceeding
provided, however, that the Truste may, on behalf of the Holders, vote for the
election of a trustee in bankruptcy or similar official and may be a member of
the creditors' committee.

          Section 6.10.  PRIORITIES.

          If the Trustee collects any money pursuant to this Article, it shall,
subject to the provisions of Article 10, pay out the money in the following
order:

          FIRST:  to the Trustee, its agents and attorneys for amounts due under
Sections 6.8 and 7.7 hereof, including payment of all compensation, expense and
liabilities incurred, and all advances made, by the Trustee and the costs and
expenses of collection;

          SECOND:  to Senior Debt to the extent required by Article 10;

          THIRD:  to Holders of Securities for amounts due and unpaid on the
Securities for principal, premium, if any, and

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                                                                              75

accrued interest, ratably, without preference or priority of any kind, 
according to the amounts due and payable on the Securities for principal, 
premium, if any, and accrued interest, as the case may be, respectively; and

          FOURTH:  to the Company or to such party as a court of competent
jurisdiction shall direct.

          The Trustee may fix a record date and payment date for any payment to
Holders of Securities pursuant to this Section 6.10.

          Section 6.11.  UNDERTAKING FOR COSTS.

          In any suit for the enforcement of any right or remedy under this
Indenture or in any suit against the Trustee for any action taken or omitted by
it as a Trustee, a court in its discretion may require the filing by any party
litigant in the suit of an undertaking to pay the costs of the suit, and the
court in its discretion may assess reasonable costs, including reasonable
attorneys' fees, against any party litigant in the suit, having due regard to
the merits and good faith of the claims or defenses made by the party litigant. 
This Section does not apply to a suit by the Trustee, a suit by a Holder of a
Security pursuant to Section 6.7 hereof, or a suit by Holders of more than 10%
in principal amount of the then outstanding Securities.

          Section 6.12.  RESTORATION OF RIGHTS AND REMEDIES.

          If the Trustee or any Holder has instituted any proceeding to enforce
any right or remedy under this Indenture and such proceeding has been
discontinued or abandoned for any reason, or has been determined adversely to
the Trustee or to such Holder, then, and in every such case, subject to any
determination in such proceeding, the Company, the Trustee and the Holders shall
be restored severally and respectively to their former positions hereunder and
thereafter all rights and remedies of the Company, Trustee and the Holders shall
continue as though no such proceeding had been instituted.


                                      ARTICLE 7
                                      TRUSTEE

          Section 7.1.  DUTIES OF TRUSTEE.

          (a)  If an Event of Default has occurred and is continuing, the 
Trustee shall exercise such of the rights and powers vested in it by this 
Indenture, and use the same degree of care and skill in its exercise, as a 
prudent man would exercise or use under the circumstances in the conduct of 
his own affairs.

          (b)  Except during the continuance of an Event of Default:

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                                                                              76

               (i)  the duties of the Trustee shall be determined solely by the
     express provisions of this Indenture and the Trustee need perform only
     those duties that are specifically set forth in this Indenture and no
     others, and no implied covenants or obligations shall be read into this
     Indenture against the Trustee; and

               (ii)  in the absence of bad faith on its part, the Trustee may
     conclusively rely, as to the truth of the statements and the correctness of
     the opinions expressed therein, upon any notices, requests, statements,
     certificates or opinions furnished to the Trustee and conforming to the
     requirements of this Indenture.  However, the Trustee shall examine the
     certificates and opinions to determine whether or not they conform to the
     requirements of this Indenture.

          (c)  The Trustee may not be relieved from liabilities for its own
negligent action, its own negligent failure to act, or its own willful
misconduct, except that:

               (i)  this paragraph does not limit the effect of paragraph (b) of
     this Section;

               (ii)  the Trustee shall not be liable for any error of judgment
     made in good faith by a Responsible Officer, unless it is proved that the
     Trustee was negligent in ascertaining the  pertinent facts; and

               (iii)  the Trustee shall not be liable with respect to any action
     it takes or omits to take in good faith in accordance with a direction
     received by it pursuant to Section 6.5 hereof.

          (d)  Whether or not therein expressly so provided, every provision of
this Indenture that in any way relates to the Trustee is subject to paragraphs
(a), (b), and (c) of this Section.

          (e)  No provision of this Indenture shall require the Trustee to
expend or risk its own funds or incur any liability.  The Trustee shall be under
no obligation to exercise any of its rights and powers under this Indenture at
the request of any Holders, unless such Holder shall have furnished to the
Trustee security and indemnity satisfactory to it against any loss, liability or
expense.

          (f)  The Trustee shall not be liable for interest on any money
received by it except as the Trustee may agree in writing with the Company. 
Money held in trust by the Trustee need not be segregated from other funds
except to the extent required by law.

<PAGE>

                                                                              77

          Section 7.2.  RIGHTS OF TRUSTEE.

          (a)  The Trustee may conclusively rely upon any document believed by
it to be genuine and to have been signed or presented by the proper Person.  The
Trustee need not investigate any fact or matter stated in the document.

          (b)  Before the Trustee acts or refrains from acting, it may require
an Officers' Certificate or an Opinion of Counsel or both.  The Trustee shall
not be liable for any action it takes or omits to take in good faith in reliance
on such Officers' Certificate or Opinion of Counsel.  The Trustee may consult
with counsel and the written advice of such counsel or any Opinion of Counsel
shall be full and complete authorization and protection from liability in
respect of any action taken, suffered or omitted by it hereunder in good faith
and in reliance thereon.

          (c)  The Trustee may act through its attorneys and agents and shall
not be responsible for the misconduct or negligence of any agent (other than any
agent who is an employee of the Trustee) appointed with due care.

          (d)  The Trustee shall not be liable for any action it takes or omits
to take in good faith that it believes to be authorized or within the rights or
powers conferred upon it by this Indenture.

          (e)  Unless otherwise specifically provided in this Indenture, any
demand, request, direction or notice from the Company or any Subsidiary
Guarantor shall be sufficient if signed by an Officer of the Company or such
Subsidiary Guarantor.

          (f)  The Trustee shall be under no obligation to exercise any of the
rights or powers vested in it by this Indenture at the request or direction of
any of the Holders unless such Holders shall have furnished to the Trustee
reasonable security or indemnity against the costs, expenses and liabilities
that might be incurred by it in compliance with such request or direction.

          (g)  Except with respect to Sections 4.1 and 4.4 hereof, the Trustee
shall have no duty to inquire as to the performance of the Company's covenants
in Article 4 hereof.  In addition, the Trustee shall not be deemed to have
knowledge of any Default or Event of Default except (i) any Event of Default
occurring pursuant to Sections 4.1, 4.4 and 6.1(1) or (2) hereof or (ii) any
Default or Event of Default of which the Trustee shall have received written
notification.  For purposes of determining the Trustee's responsibility
hereunder, whenever reference is made in this Indenture to a Default or Event of
Default, such reference shall be construed to refer only to a Default or Event
of Default of which the Trustee is deemed to have notice pursuant to this
Section 7.2(g)

          (h)  The Trustee shall not be required to give any bond or surety in
respect of the performance of its powers and duties

<PAGE>


                                                                              78

hereunder.

          (i)  the Trustee shall not be bound to ascertain or inquire as to the
performance or observance of any covenants, conditions, or agreements on the
part of the Company or any Subsidiary Guarantor, except as otherwise set forth
herein, but the Trustee may require of the Company full information and advice
as to the performance of the covenants, conditions and agreements contained
herein and shall be entitled in connection herewith to examine the books,
records and premises of the Company.

          (j)  The permissive rights of the Trustee to perform the acts
enumerated in this Indenture shall not be construed as a duty and the Trustee
shall not be answerable for other than its gross negligence or willful
misconduct.

          Section 7.3.  INDIVIDUAL RIGHTS OF TRUSTEE.

          The Trustee in its individual or any other capacity may become the
owner or pledgee of Securities and may otherwise deal with the Company, the
Subsidiary Guarantors or any Affiliate of the Company with the same rights it
would have if it were not Trustee.  However, in the event that the Trustee
acquires any conflicting interest it must eliminate such conflict within 90
days, apply to the Commission for permission to continue as trustee or resign. 
Any Agent may do the same with like rights and duties.  The Trustee is also
subject to Sections 7.10 and 7.11 hereof.

          Section 7.4.  TRUSTEE'S DISCLAIMER.

          The Trustee shall not be responsible for and makes no representation
as to the validity or adequacy of this Indenture, the Securities, or the
Subsidiary Guarantees, it shall not be accountable for the Company's use of the
proceeds from the Securities or any money paid to the Company or upon the
Company's direction under any provision of this Indenture, it shall not be
responsible for the use or application of any money received by any Paying Agent
other than the Trustee, and it shall not be responsible for any statement or
recital herein or in any certificate delivered pursuant hereto or any statement
in the Securities or any other document in connection with the sale of the
Securities or pursuant to this Indenture other than its certificate of
authentication.

<PAGE>

                                                                              79

          Section 7.5.  NOTICE OF DEFAULTS.

          If a Default or Event of Default occurs and is continuing and if it is
actually known to the Trustee, the Trustee shall mail to Holders of Securities a
notice of the Default or Event of Default within 90 days after it occurs. 
Except in the case of a Default or Event of Default in payment of principal of,
premium, if any, or interest on, any Security, the Trustee may withhold the
notice if and so long as a committee of its Responsible Officers in good faith
determines that withholding the notice is in the interests of the Holders of the
Securities.

          Section 7.6.  REPORTS BY TRUSTEE TO HOLDERS OF THE SECURITIES.

          Within 60 days after each May 15 beginning with the May 15 following
the date of this Indenture, and for so long as Securities remain outstanding,
the Trustee shall mail to the Holders of the Securities a brief report dated as
of such reporting date that complies with TIA Section  313(a) (but if no event
described in TIA Section  313(a) has occurred within the twelve months preceding
the reporting date, no report need be transmitted).  The Trustee also shall
comply with TIA Section  313(b)(2) and transmit by mail all reports as required
by TIA Section  313(c).

          A copy of each report at the time of its mailing to the Holders of
Securities shall be mailed to the Company and filed with the Commission and each
stock exchange on which the Securities are listed in accordance with TIA Section
 313(d).  The Company shall promptly notify the Trustee when the Securities are
listed on any stock exchange.

          Section 7.7.  COMPENSATION AND INDEMNITY.

          The Company and the Subsidiary Guarantors shall pay to the Trustee
from time to time reasonable compensation for its acceptance of this Indenture
and services hereunder, including, without limitation, extraordinary services
such as default administration.  The Trustee's compensation shall not be limited
by any law on compensation of a trustee of an express trust.  The Company and
the Subsidiary Guarantors shall reimburse the Trustee upon demand for all
reasonable disbursements, advances and expenses incurred or made by it in
addition to the compensation for its services.  Such expenses shall include the
reasonable compensation, disbursements and expenses of the Trustee's agents and
counsel.

          The Company and the Subsidiary Guarantors shall indemnify the Trustee
against any and all losses, liabilities or expenses incurred by it arising out
of or in connection with the acceptance or administration of its duties under
this Indenture, including the costs and expenses of enforcing this Indenture
against the Company and the Subsidiary Guarantors (including this Section 7.7)
and investigating or defending itself against any

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                                                                              80

claim (whether asserted by the Company, the Subsidiary Guarantors or any 
Holder or any other Person) or liability in connection with the exercise or 
performance of any of its powers or duties hereunder, except to the extent 
any such loss, liability or expense may be attributable to its gross 
negligence or bad faith.  The Trustee shall notify the Company and the 
Subsidiary Guarantors promptly of any claim for which it may seek indemnity.  
Failure by the Trustee to so notify the Company and the Subsidiary Guarantors 
shall not relieve the Company and the Subsidiary Guarantors of their 
obligations hereunder.  The Company and the Subsidiary Guarantors shall 
defend the claim and the Trustee shall cooperate in the defense.  The Trustee 
may have separate counsel and the Company and the Subsidiary Guarantors shall 
pay the reasonable fees and expenses of such counsel.  The Company and the 
Subsidiary Guarantors need not pay for any settlement made without their 
consent, which consent shall not be unreasonably withheld.

          The obligations of the Company and the Subsidiary Guarantors under
this Section 7.7 are joint and several and shall survive the resignation or
removal of the Trustee, the satisfaction and discharge of this Indenture and any
rejection or termination under any Bankruptcy Law.

          To secure the Company's and the Subsidiary Guarantors' payment
obligations in this Section, the Trustee shall have a Lien prior to the
Securities on all money or property held or collected by the Trustee.  Such Lien
shall survive the satisfaction and discharge of this Indenture.

          When the Trustee incurs expenses or renders services after an Event of
Default specified in Section 6.1(9) or (10) hereof occurs, the expenses and the
compensation for the services (including the fees and expenses of its agents and
counsel) are intended to constitute expenses of administration under any
Bankruptcy Law.

          The Trustee shall comply with the provisions of TIA Section  313(b)(2)
to the extent applicable.

          Section 7.8.  REPLACEMENT OF TRUSTEE.

          A resignation or removal of the Trustee and appointment of a successor
Trustee shall become effective only upon the successor Trustee's acceptance of
appointment as provided in this Section.

          The Trustee may resign in writing at any time and be discharged from
the trust hereby created by so notifying the Company.  The Holders of Securities
of a majority in principal amount of the then outstanding Securities may remove
the Trustee by so notifying the Trustee and the Company in writing.  The Company
may remove the Trustee if:

          (a)  the Trustee fails to comply with Section 7.10 hereof;


<PAGE>
                                                                            81

          (b)  the Trustee is adjudged a bankrupt or an insolvent or an order
     for relief is entered with respect to the Trustee under any Bankruptcy Law;

          (c)  a Custodian or public officer takes charge of the Trustee or its
     property; or

          (d)  the Trustee becomes incapable of acting.

          If the Trustee resigns or is removed or if a vacancy exists in the 
office of Trustee for any reason, the Company shall promptly appoint a 
successor Trustee.  Within one year after the successor Trustee takes office, 
the Holders of a majority in principal amount of the then outstanding 
Securities may appoint a successor Trustee to replace the successor Trustee 
appointed by the Company.

          If a successor Trustee does not take office within 60 days after 
the retiring Trustee resigns or is removed, the retiring Trustee, the 
Company, or the Holders of Securities of at least 10% in principal amount of 
the then outstanding Securities may petition any court of competent 
jurisdiction for the appointment of a successor Trustee.

          If the Trustee, after written request by any Holder of a Security 
who has been a Holder of a Security for at least six months, fails to comply 
with Section 7.10, such Holder of a Security may petition any court of 
competent jurisdiction for the removal of the Trustee and the appointment of 
a successor Trustee.

          A successor Trustee shall deliver a written acceptance of its 
appointment to the retiring Trustee and to the Company.  Thereupon, the 
resignation or removal of the retiring Trustee shall become effective, and 
the successor Trustee shall have all the rights, powers and duties of the 
Trustee under this Indenture.  The successor Trustee shall mail a notice of 
its succession to Holders of the Securities.  The retiring Trustee shall 
promptly transfer all property held by it as Trustee to the successor 
Trustee, PROVIDED all sums owing to the Trustee hereunder have been paid and 
subject to the Lien provided for in Section 7.7 hereof.  Notwithstanding 
replacement of the Trustee pursuant to this Section 7.8, the Company's 
obligations under Section 7.7 hereof shall continue for the benefit of the 
retiring Trustee and the Company shall pay to such replaced or removed 
Trustee all amounts owed under Section 7.7 upon such replacement or removal.

          Section 7.9.  SUCCESSOR TRUSTEE BY MERGER, ETC. 

          If the Trustee consolidates, merges or converts into, or transfers 
all or substantially all of its corporate trust business to, another 
corporation, the successor corporation without any further act shall be the 
successor Trustee.

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                                                                            82

          Section 7.10.  ELIGIBILITY; DISQUALIFICATION.

          There shall at all times be a Trustee hereunder that is a 
corporation organized and doing business under the laws of the United States 
of America or of any state thereof that is authorized under such laws to 
exercise corporate trustee power, that is subject to supervision or 
examination by federal or state authorities and that has a combined capital 
and surplus of at least $50 million as set forth in its most recent published 
annual report of condition.

          This Indenture shall always have a Trustee who satisfies the 
requirements of TIA Section  310(a)(1), (2) and (5).  The Trustee is subject 
to TIA Section  310(b).

          Section 7.11.  PREFERENTIAL COLLECTION OF CLAIMS AGAINST COMPANY.

          The Trustee is subject to TIA Section  311(a), excluding any 
creditor relationship listed in TIA Section  311(b).  A Trustee who has 
resigned or been removed shall be subject to TIA Section  311(a) to the 
extent indicated therein.


                                   ARTICLE 8
                    LEGAL DEFEASANCE AND COVENANT DEFEASANCE

          Section 8.1.  OPTION TO EFFECT LEGAL DEFEASANCE OR COVENANT 
DEFEASANCE.

          The Company may, at the option of its Board of Directors evidenced 
by a resolution set forth in an Officers' Certificate, at any time, elect to 
have either Section 8.2 or 8.3 hereof be applied to all outstanding 
Securities upon compliance with the conditions set forth below in this 
Article 8.

<PAGE>
                                                                            83

          Section 8.2.  LEGAL DEFEASANCE AND DISCHARGE.

          Upon the Company's exercise under Section 8.1 hereof of the option 
applicable to this Section 8.2, the Company and the Subsidiary Guarantors 
shall, subject to the satisfaction of the conditions set forth in Section 8.4 
hereof, be deemed to have been discharged from their obligations with respect 
to all outstanding Securities and the Subsidiary Guarantees thereof on the 
date the conditions set forth below are satisfied (hereinafter, "LEGAL 
DEFEASANCE").  For this purpose, Legal Defeasance means that the Company 
shall be deemed to have paid and discharged the entire Indebtedness 
represented by the outstanding Securities, which shall thereafter be deemed 
to be "OUTSTANDING" only for the purposes of Section 8.5 hereof and the other 
Sections of this Indenture referred to in (a) and (b) below, and to have 
satisfied all its other obligations under such Securities and this Indenture 
(and the Trustee, on demand of and at the expense of the Company, shall 
execute proper instruments acknowledging the same), except for the following 
provisions which shall survive until otherwise terminated or discharged 
hereunder:  (a) the rights of Holders of outstanding Securities to receive 
payments in respect of the principal of, premium, if any, and interest on 
such Securities when such payments are due from the trust fund described in 
Section 8.4 hereof, and as more fully set forth in such Section, (b) the 
Company's obligations with respect to such Securities under Article 2 and 
Section 4.2 hereof, (c) the rights, powers, trusts, duties and immunities of 
the Trustee hereunder and the Company's obligations in connection therewith 
and (d) this Article 8.  Subject to compliance with this Article 8, the 
Company may exercise its option under this Section 8.2 notwithstanding the 
prior exercise of its option under Section 8.3 hereof.

<PAGE>
                                                                            83

          Section 8.3.  COVENANT DEFEASANCE.

          Upon the Company's exercise under Section 8.1 hereof of the option 
applicable to this Section 8.3, the Company shall, subject to the 
satisfaction of the conditions set forth in Section 8.4 hereof, be released 
from their obligations under the covenants contained in Sections 4.3, 4.5, 
4.7, 4.8, 4.9, 4.10, 4.11, 4.12, 4.13, 4.14, 4.16, 4.17, 4.18 and 4.19 hereof 
and in clause (iv) of Section 5.1 on and after the date the conditions set 
forth below are satisfied (hereinafter, "COVENANT DEFEASANCE"), and the 
Securities shall thereafter be deemed not "OUTSTANDING" for the purposes of 
any compliance certificate, direction, waiver, consent or declaration or act 
of Holders (and the consequences of any thereof) in connection with such 
covenants, but shall continue to be deemed "OUTSTANDING" for all other 
purposes hereunder (it being understood that such Securities shall not be 
deemed outstanding for accounting purposes).  For this purpose, Covenant 
Defeasance means that, with respect to the outstanding Securities, the 
Company may omit to comply with and shall have no liability in respect of any 
term, condition or limitation set forth in any such covenant, whether 
directly or indirectly, by reason of any reference elsewhere herein to any 
such covenant or by reason of any reference in any such covenant to any other 
provision herein or in any other document and such omission to comply shall 
not constitute a Default or an Event of Default under Section 6.1 hereof, 
but, except as specified above, with respect to the remainder of this 
Indenture, such Securities and the Subsidiary Guarantees shall be unaffected 
thereby.  In addition, upon the Company's exercise under Section 8.1 hereof 
of the option applicable to this Section 8.3 hereof, subject to the 
satisfaction of the conditions set forth in Section 8.4 hereof, Sections 
6.1(3) (but only with respect to the Company's failure to observe or perform 
the covenants, conditions and agreements of the Company under clause (iv) of 
Section 5.1), 6.1(4), 6.1(7) and 6.1(8) hereof shall not constitute Events of 
Default.

          Section 8.4.  CONDITIONS TO LEGAL OR COVENANT DEFEASANCE.

          The following shall be the conditions to the application of either 
Section 8.2 or 8.3 hereof to the outstanding Securities:

          In order to exercise either Legal Defeasance or Covenant Defeasance:

          (a)  the Company must irrevocably deposit with the Trustee, in 
trust, for the benefit of the Holders of the Securities, cash in United 
States dollars, non-callable Government Securities, or a combination thereof, 
in such amounts as will be sufficient, in the opinion of a nationally 
recognized firm of independent public accountants, to pay the principal of, 
premium, if any, and interest, on the outstanding Securities on the stated 
maturity or on the applicable redemption date, as the 


<PAGE>
                                                                            85

case may be, and the Company must specify whether the Securities are being 
defeased to maturity or to a particular redemption date;

          (b)  in the case of an election under Section 8.2 hereof, the 
Company shall have delivered to the Trustee an Opinion of Counsel in the 
United States reasonably acceptable to the Trustee confirming that (A) the 
Company has received from, or there has been published by, the Internal 
Revenue Service a ruling or (B) since the date of this Indenture, there has 
been a change in the applicable federal income tax law, in either case to the 
effect that, and based thereon such Opinion of Counsel shall confirm that, 
the Holders of the outstanding Securities will not recognize income, gain or 
loss for federal income tax purposes as a result of such Legal Defeasance and 
will be subject to federal income tax on the same amounts, in the same manner 
and at the same times as would have been the case if such Legal Defeasance 
had not occurred;

          (c)  in the case of an election under Section 8.3 hereof, the 
Company shall have delivered to the Trustee an Opinion of Counsel in the 
United States reasonably acceptable to the Trustee confirming that the 
Holders of the outstanding Securities will not recognize income, gain or loss 
for federal income tax purposes as a result of such Covenant Defeasance and 
will be subject to federal income tax on the same amounts, in the same manner 
and at the same times as would have been the case if such Covenant Defeasance 
had not occurred;

          (d)  no Default or Event of Default shall have occurred and be 
continuing on the date of such deposit (other than a Default or Event of 
Default resulting from the borrowing of funds to be applied to such deposit) 
or insofar as Section 6.1(9) or 6.1(10) hereof is concerned, at any time in 
the period ending on the 91st day after the date of deposit;

          (e)  such Legal Defeasance or Covenant Defeasance shall not result 
in a breach or violation of, or constitute a default under, any material 
agreement or instrument (other than this Indenture) to which the Company or 
any of its Subsidiaries is a party or by which the Company or any of its 
Subsidiaries is bound;

          (f)  the Company shall have delivered to the Trustee an Opinion of 
Counsel to the effect that after the 91st day following the deposit, the 
trust funds will not be subject to the effect of any applicable bankruptcy, 
insolvency, reorganization or similar laws affecting creditors' rights 
generally;

          (g)  the Company shall deliver to the Trustee an Officers' 
Certificate stating that the deposit was not made by the Company with the 
intent of preferring the Holders of the Securities over the other creditors 
of the Company, or with the intent of defeating, hindering, delaying or 
defrauding creditors of the Company or others; and


<PAGE>
                                                                            86

          (h)  the Company shall have delivered to the Trustee an Officers' 
Certificate and an Opinion of Counsel, each stating that all conditions 
precedent provided for or relating to the Legal Defeasance or the Covenant 
Defeasance have been complied with.

          Section 8.5.  DEPOSITED MONEY AND GOVERNMENT SECURITIES TO BE HELD 
IN TRUST; OTHER MISCELLANEOUS PROVISIONS.

          Subject to Section 8.6 hereof, all money and non-callable 
Government Securities (including the proceeds thereof) deposited with the 
Trustee (or other qualifying trustee, collectively for purposes of this 
Section 8.5, the "TRUSTEE") pursuant to Section 8.4 hereof in respect of the 
outstanding Securities shall be held in trust and applied by the Trustee, in 
accordance with the provisions of such Securities and this Indenture, to the 
payment, either directly or through any Paying Agent (including the Company 
acting as Paying Agent) as the Trustee may determine, to the Holders of such 
Securities of all sums due and to become due thereon in respect of principal, 
premium, if any, and interest, but such money need not be segregated from 
other funds except to the extent required by law.

          The Company and the Subsidiary Guarantors shall pay and indemnify 
the Trustee against any tax, fee or other charge imposed on or assessed 
against the cash or non-callable Government Securities deposited pursuant to 
Section 8.4 hereof or the principal and interest received in respect thereof 
other than any such tax, fee or other charge which by law is for the account 
of the Holders of the outstanding Securities.

          Anything in this Article 8 to the contrary notwithstanding, the 
Trustee shall deliver or pay to the Company from time to time upon the 
request of the Company any money or non-callable Government Securities held 
by it as provided in Section 8.4 hereof which, in the opinion of a nationally 
recognized firm of independent public accountants expressed in a written 
certification thereof delivered to the Trustee (which may be the opinion 
delivered under Section 8.4(a) hereof), are in excess of the amount thereof 
that would then be required to be deposited to effect an equivalent Legal 
Defeasance or Covenant Defeasance.

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                                                                            87

          Section 8.6.  REPAYMENT TO COMPANY.

          Any money deposited with the Trustee or any Paying Agent, or then 
held by the Company, in trust for the payment of the principal of, premium, 
if any, or interest on any Security and remaining unclaimed for two years 
after such principal, premium, if any, or interest has become due and payable 
shall be paid to the Company on its request or (if then held by the Company) 
shall be discharged from such trust; and the Holder of such Security shall 
thereafter, as a general creditor, look only to the Company for payment 
thereof, and all liability of the Trustee or such Paying Agent with respect 
to such trust money, and all liability of the Company as trustee thereof, 
shall thereupon cease; PROVIDED, HOWEVER, that the Trustee or such Paying 
Agent, before being required to make any such repayment, may at the expense 
of the Company cause to be published once, in the NEW YORK TIMES and THE WALL 
STREET JOURNAL (national edition), notice that such money remains unclaimed 
and that, after a date specified therein, which shall not be less than 30 
days from the date of such notification or publication, any unclaimed balance 
of such money then remaining shall be repaid to the Company.

          Section 8.7.  REINSTATEMENT.

          If the Trustee or Paying Agent is unable to apply any United States 
dollars or non-callable Government Securities in accordance with Section 8.2 
or 8.3 hereof, as the case may be, by reason of any order or judgment of any 
court or governmental authority enjoining, restraining or otherwise 
prohibiting such application, then the obligations of the Company and the 
Subsidiary Guarantors under this Indenture, the Securities and the Subsidiary 
Guarantees shall be revived and reinstated as though no deposit had occurred 
pursuant to Section 8.2 or 8.3 hereof, as the case may be; PROVIDED, HOWEVER, 
that if the Company or any Subsidiary Guarantor makes any payment of 
principal of, premium, if any, or interest on any Security following the 
reinstatement of its obligations, the Company or such Subsidiary Guarantor 
shall be subrogated to the rights of the Holders of such Securities to 
receive such payment from the money held by the Trustee or Paying Agent.


                                  ARTICLE 9
                      AMENDMENT, SUPPLEMENT AND WAIVER

          Section 9.1.  WITHOUT CONSENT OF HOLDERS OF SECURITIES.

          Notwithstanding Section 9.2 of this Indenture, the Company, the 
Subsidiary Guarantors and the Trustee may amend or supplement this Indenture, 
the Securities or the Subsidiary Guarantees without the consent of any Holder 
of a Security:

          (a)  to cure any ambiguity, defect or inconsistency;


<PAGE>
                                                                            88

          (b)  to provide for uncertificated Securities in addition to or in
     place of certificated Securities (PROVIDED, HOWEVER, that the
     uncertificated Securities are issued in registered form for purposes of
     section 163(f) of the Code, or in a manner such that the uncertificated
     Securities are described in Section 163(f)(2)(B) of the Code);

          (c)  to provide for the assumption of the Company's obligations to the
     Holders of the Securities in the case of a merger or consolidation pursuant
     to Article 5 hereof;

          (d)  to make any change that would provide any additional rights or
     benefits to the Holders of the Securities or that does not adversely affect
     the legal rights hereunder of any Holder of the Security;

          (e)  to add Guarantees with respect to the Securities or to secure the
     Securities; or

          (f)  to comply with requirements of the Commission in order to effect
     or maintain the qualification of this Indenture under the TIA.

          Upon the request of the Company accompanied by a resolution of the 
Board of Directors of the Company and each of the Subsidiary Guarantors, as 
the case may be, authorizing the execution of any such amended or 
supplemental indenture, and upon receipt by the Trustee of the documents 
described in Section 7.2 hereof, the Trustee shall join with the Company and 
the Subsidiary Guarantors in the execution of any amended or supplemental 
indenture authorized or permitted by the terms of this Indenture and to make 
any further appropriate agreements and stipulations that may be therein 
contained, but the Trustee shall not be obligated to enter into such amended 
or supplemental Indenture that affects its own rights, duties or immunities 
under this Indenture or otherwise.


<PAGE>
                                                                            89

          Section 9.2.  WITH CONSENT OF HOLDERS OF SECURITIES.

          Except as provided below in this Section 9.2, the Company, the 
Subsidiary Guarantors and the Trustee may amend or supplement this Indenture, 
the Securities and the Subsidiary Guarantees with the consent of the Holders 
of at least a majority in aggregate principal amount of the Securities then 
outstanding (including, without limitation, consents obtained in connection 
with a purchase of, or tender offer or exchange offer for the Securities), 
and, subject to Sections 6.4 and 6.7 hereof, any existing Default or Event of 
Default (other than a Default or Event of Default in the payment of the 
principal of, premium, if any, or interest on the Securities) or compliance 
with any provision of this Indenture, the Securities or the Subsidiary 
Guarantees may be waived with the consent of the Holders of a majority in 
principal amount of the then outstanding Securities (including, without 
limitation, consents obtained in connection with a purchase of, or tender 
offer or exchange offer for the Securities).

          In addition, any amendment to the provisions of Article 10 of this 
Indenture shall require the consent of the Holders of at least 66_% in 
aggregate principal amount of the Securities then outstanding if such 
amendment would adversely affect the rights of Holders of Securities; 
provided that, no amendment may be made to the provisions of Article 10 of 
this Indenture that adversely affects the rights of any holder of Senior Debt 
then outstanding unless the holders of such Senior Debt (or any group or 
representative thereof authorized to consent) consent to such change.

          Subject to Sections 6.4 and 6.7 hereof, the Holders of a majority 
in aggregate principal amount of the Securities then outstanding may waive 
compliance in a particular instance by the Company or any Subsidiary 
Guarantor with any provision of this Indenture, the Securities or the 
Subsidiary Guarantees.  However, without the consent of each Holder affected, 
an amendment or waiver may not (with respect to any Securities held by a 
non-consenting Holder):

          (a)  reduce the principal amount of Securities whose Holders must
     consent to an amendment, supplement or waiver;

          (b)  reduce the principal of or change the fixed maturity of any
     Security or alter the provisions with respect to the redemption of the
     Securities (except as provided above with respect to Sections 3.9, 4.10 and
     4.13 hereof);

          (c)  reduce the rate of or change the time for payment of interest on
     any Security;

          (d)  waive a Default or Event of Default in the payment of principal
     of or premium, if any, or interest on the Securities (except a rescission
     of acceleration of the Securities by the Holders of at least a majority in

<PAGE>
                                                                            90

     principal amount of the Securities and a waiver of the payment default that
     resulted from such acceleration);

          (e)  make any Security payable in money other than that stated in the
     Securities;

          (f)  make any change in the provisions of this Indenture relating to
     waivers of past Defaults or the rights of Holders of Securities to receive
     payments of principal or premium, if any, or interest on the Securities; 

          (g)  make any change in the foregoing amendment and waiver provisions;
     or

          (h)  except as provided under Section 11.4 or Article 8, release any
     Subsidiary Guarantor from its obligations under its Subsidiary Guarantee or
     make any change in a Subsidiary Guaranty that would adversely affect the
     Holders.  

          Upon the request of the Company accompanied by a resolution of the 
Board of Directors of the Company and each of the Subsidiary Guarantors, as 
the case may be, authorizing the execution of any such amended or 
supplemental indenture, and upon the filing with the Trustee of evidence 
satisfactory to the Trustee of the consent of the Holders of Securities as 
aforesaid, and upon receipt by the Trustee of the documents described in 
Section 7.2 hereof, the Trustee shall join with the Company and the 
Subsidiary Guarantors in the execution of such amended or supplemental 
indenture unless such amended or supplemental indenture affects the Trustee's 
own rights, duties or immunities under this indenture or otherwise, in which 
case the Trustee may in its discretion, but shall not be obligated to, enter 
into such amended or supplemental indenture.

          It shall not be necessary for the consent of the Holders of 
Securities under this Section 9.2 to approve the particular form of any 
proposed amendment or waiver, but it shall be sufficient if such consent 
approves the substance thereof.

          After an amendment, supplement or waiver under this Section becomes 
effective, the Company shall mail to the Holders of Securities affected 
thereby a notice briefly describing the amendment, supplement or waiver.  Any 
failure of the Company to mail such notice, or any defect therein, shall not, 
however, in any way impair or affect the validity of any such amended or 
supplemental indenture or waiver.

          Section 9.3.  COMPLIANCE WITH TRUST INDENTURE ACT.

          Every amendment or supplement to this Indenture or the Securities 
shall be set forth in an amended or supplemental Indenture that complies with 
the TIA as then in effect.

<PAGE>
                                                                             91

          Section 9.4.  REVOCATION AND EFFECT OF CONSENTS.

          Until an amendment, supplement or waiver becomes effective, a 
consent to it by a Holder of a Security is a continuing consent by the Holder 
of a Security and every subsequent Holder of a Security or portion of a 
Security that evidences the same debt as the consenting Holder's Security, 
even if notation of the consent is not made on any Security.  However, any 
such Holder of a Security or subsequent Holder of a Security may revoke the 
consent as to its Security if the Trustee receives written notice of 
revocation before the date the waiver, supplement or amendment becomes 
effective.  An amendment, supplement or waiver becomes effective in 
accordance with its terms and thereafter binds every Holder.

          Section 9.5.  NOTATION ON OR EXCHANGE OF SECURITIES.

          The Trustee may place an appropriate notation about an amendment, 
supplement or waiver on any Security thereafter authenticated.  The Company 
in exchange for all Securities may issue and the Trustee shall authenticate 
new Securities that reflect the amendment, supplement or waiver.

          Failure to make the appropriate notation or issue a new Security 
shall not affect the validity and effect of such amendment, supplement or 
waiver.

          Section 9.6.  TRUSTEE TO SIGN AMENDMENT, ETC. 

          The Trustee shall sign any amended or supplemental indenture 
authorized pursuant to this Article 9 if the amendment or supplement does not 
adversely affect the rights, duties, liabilities or immunities of the 
Trustee. Neither the Company nor any Subsidiary Guarantor may sign an 
amendment or supplemental Indenture until its respective Board of Directors 
approves it.  In executing any amended or supplemental indenture, the Trustee 
shall be entitled to receive and (subject to Section 7.1) shall be fully 
protected in relying upon, an Officer's Certificate and an Opinion of Counsel 
stating that the execution of such amended or supplemental indenture is 
authorized or permitted by this Indenture and that there has been compliance 
with all conditions precedent.


<PAGE>
                                                                             92

                                  ARTICLE 10
                                 SUBORDINATION

          Section 10.1.  AGREEMENT TO SUBORDINATE.

          The Company and each Subsidiary Guarantor agree, and each Holder by 
accepting a Security and the related Subsidiary Guarantee agrees, that (i) 
the Indebtedness evidenced by (a) the Securities, including, but not limited 
to, the payment of principal of, premium, if any, and interest on the 
Securities, and any other payment Obligation of the Company in respect of the 
Securities (including any obligation to repurchase the Securities) is 
subordinated in right of payment, to the extent and in the manner provided in 
this Article, to the prior payment in full in cash of all Senior Debt of the 
Company (whether outstanding on the date hereof or hereafter created, 
incurred, assumed or guaranteed), and (b) the Subsidiary Guarantees and other 
payment Obligations in respect of the Subsidiary Guarantees are subordinated 
in right of payment, to the extent and in the manner provided in this 
Article, to the prior payment in full in cash of all Guarantor Senior Debt of 
each Subsidiary Guarantor and (ii) the subordination is for the benefit of 
the Holders of Senior Debt and Guarantor Senior Debt.

          Section 10.2.  CERTAIN DEFINITIONS.

          "BANKRUPTCY LAW" means title 11, U.S. Code or any similar Federal 
or state law for the relief of debtors.

          "GUARANTOR SENIOR DEBT" means any Indebtedness of a Subsidiary 
Guarantor permitted to be incurred under the terms of this Indenture, unless 
the instrument under which such Indebtedness is incurred expressly provides 
that it is on a parity with or subordinated in right of payment to the 
Subsidiary Guarantee of such Subsidiary Guarantor, including interest 
accruing subsequent to the filing of, or which would have accrued but for the 
filing of, a petition of bankruptcy, whether or not such interest is an 
allowable claim in such bankruptcy proceeding.  Notwithstanding anything to 
the contrary in the foregoing sentence, Guarantor Senior Debt shall not 
include (1) any liability for federal, state, local or other taxes owed or 
owing by any Subsidiary Guarantor, (2) any obligation of a Subsidiary 
Guarantor to the Company or to any other Restricted Subsidiary of the 
Company, (3) any accounts payable or trade liabilities of a Subsidiary 
Guarantor arising in the ordinary course of business (including instruments 
evidencing such liabilities), (4) any Indebtedness of Subsidiary Guarantor 
that is incurred in violation of this Indenture, (5) Indebtedness of a 
Subsidiary Guarantor which, when incurred and without respect to any election 
under Section 1111(b) of Title 11, United States Code, is without recourse to 
such Subsidiary Guarantor, and (6) Indebtedness evidenced by a Subsidiary 
Guarantee.

          "REPRESENTATIVE" means the indenture trustee or other 

<PAGE>
                                                                             93

trustee, agent or representative for any Senior Debt or Guarantor Senior 
Debt, as the case may be.

          "SENIOR DEBT" means (i) Indebtedness of the Company or any 
Subsidiary of the Company under or in respect of any Credit Facility, whether 
for principal, interest (including interest accruing after the filing of a 
petition initiating any proceeding pursuant to any bankruptcy law, whether or 
not the claim for such interest is allowed as a claim in such proceeding), 
reimbursement obligations, fees, commissions, expenses, indemnities or other 
amounts, and (ii) any other Indebtedness permitted under the terms of this 
Indenture, unless the instrument under which such Indebtedness is incurred 
expressly provides that it is on a parity with or subordinated in right of 
payment to the Securities. Notwithstanding anything to the contrary in the 
foregoing sentence, Senior Debt will not include (w) any liability for 
federal, state, local or other taxes owed or owing by the Company, (x) any 
Indebtedness of the Company to any of its Subsidiaries or other Affiliates, 
(y) any trade payables or (z) any Indebtedness that is incurred in violation 
of this Indenture (other than Indebtedness under (i) the Existing Credit 
Facility or (ii) any other Credit Facility that is incurred on the basis of a 
representation by the Company to the applicable lenders that it is permitted 
to incur such Indebtedness under this Indenture).

          A "distribution" may consist of cash, securities or other property, 
by set-off or otherwise.

          All Designated Senior Debt now or hereafter existing and all other 
Obligations relating thereto shall not be deemed to have been paid in full 
unless the holders or owners thereof shall have received payment in full in 
cash (or other form of payment consented to by the holders of such Designated 
Senior Debt) with respect to such Designated Senior Debt and all other 
Obligations with respect thereto.

          Section 10.3.  LIQUIDATION; DISSOLUTION; BANKRUPTCY.

          (a)  Upon any payment or distribution of property or securities to 
creditors of the Company in a liquidation or dissolution of the Company or in 
a bankruptcy, reorganization, insolvency, receivership or similar proceeding 
relating to the Company or its property, or in an assignment for the benefit 
of creditors or any marshalling of the Company's assets and liabilities:

          (1)  the holders of Senior Debt of the Company shall be entitled to
     receive payment in full in cash of all Obligations in respect of such
     Senior Debt (including interest after the commencement of any such
     proceeding at the rate specified in the applicable Senior Debt, whether or
     not a claim for such interest would be allowed in such proceeding) before
     the Holders of Securities shall be entitled to receive any payment with
     respect to the Securities and related Obligations (except in each case that
     Holders of Securities may receive securities that are 


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                                                                             94

     subordinated at least to the same extent as the Securities to Senior 
     Debt and any securities issued in exchange for Senior Debt and payments 
     made from any defeasance trust created pursuant to Section 8.1 hereof 
     provided that the applicable deposit does not violate Article 8 or 10 of 
     this Indenture); and

          (2)  until all Obligations with respect to Senior Debt of the 
     Company (as provided in subsection (1) above) are paid in full in cash, 
     any payment or distribution to which the Holders of Securities and the 
     related Subsidiary Guarantees would be entitled shall be made to holders 
     of Senior Debt of the Company (except that Holders of Securities and the 
     related Subsidiary Guarantees may receive securities that are 
     subordinated at least to the same extent as the Securities to Senior 
     Debt and any securities issued in exchange for Senior Debt and payments 
     made from any defeasance trust created pursuant to Section 8.1 hereof 
     provided that the applicable deposit does not violate Article 8 or 10 of 
     this Indenture).

          (b)  Upon any payment or distribution of property or securities to
creditors of a Subsidiary Guarantor in a liquidation or dissolution of such
Subsidiary Guarantor or in a bankruptcy, reorganization, insolvency,
receivership or similar proceeding relating to such Subsidiary Guarantor or its
property, or in an assignment for the benefit of creditors or any marshalling of
such Subsidiary Guarantor's assets and liabilities:

          (1)  the holders of Guarantor Senior Debt of such Subsidiary 
     Guarantor shall be entitled to receive payment in full in cash of all 
     Obligations in respect of such Guarantor Senior Debt (including interest 
     after the commencement of any such proceeding at the rate specified in 
     the applicable Senior Debt, whether or not a claim for such interest 
     would be allowed in such proceeding) before the Holders of Securities 
     and the related Subsidiary Guarantees shall be entitled to receive any 
     payment or distribution with respect to the Subsidiary Guarantee made by 
     such Subsidiary Guarantor (except in each case that Holders of 
     Securities and the related Subsidiary Guarantees may receive securities 
     that are subordinated at least to the same extent as the Securities to 
     Senior Debt and any securities issued in exchange for Senior Debt and 
     payments made from any defeasance trust created pursuant to Section 8.1 
     hereof provided that the applicable deposit does not violate Article 8 
     or 10 of this Indenture); and

          (2)  until all Obligations with respect to Guarantor Senior Debt of 
     such Subsidiary Guarantor (as provided in subsection (1) above) are paid 
     in full in cash, any payment or distribution to which the Holders of 
     Securities and the related Subsidiary Guarantees would be entitled shall 
     be made to holders of Guarantor Senior Debt of such Subsidiary Guarantor 
     (except that Holders of Securities and the related 


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                                                                             95

     Subsidiary Guarantees may receive securities that are subordinated at 
     least to the same extent as the Securities to Senior Debt and any 
     securities issued in exchange for Senior Debt and payments made from any 
     defeasance trust created pursuant to Section 8.1 hereof provided that 
     the applicable deposit does not violate Article 8 or 10 of this 
     Indenture).

          Under the circumstances described in this Section 10.3, the 
Company, any Subsidiary Guarantor or any receiver, trustee in bankruptcy, 
liquidating trustee, agent or other similar person making any payment or 
distribution of cash or other property or securities is authorized or 
instructed to make any payment or distribution to which the Holders of the 
Securities and the related Subsidiary Guarantees would otherwise be entitled 
(other than securities that are subordinated at least to the same extent as 
the Securities to Senior Debt and any securities issued in exchange for 
Senior Debt and payments made from any defeasance trust referred to in the 
second parenthetical clause of each of clauses (a)(1), (b)(1), (c)(1), 
(a)(2), (b)(2) and (c)(2) above, which shall be delivered or paid to the 
Holders of Securities as set forth in such clauses) directly to the holders 
of the Senior Debt of the Company and the holders of Guarantor Senior Debt of 
any Subsidiary Guarantor, as applicable, (PRO RATA to such holders on the 
basis of the respective amounts of Senior Debt of the Company and Guarantor 
Senior Debt of any Subsidiary Guarantor, as applicable, held by such holders) 
or their Representatives, or to any trustee or trustees under any other 
indenture pursuant to which any such Senior Debt or Guarantor Senior Debt, as 
the case may be, may have been issued, as their respective interests appear, 
to the extent necessary to pay all such Senior Debt or Guarantor Senior Debt, 
as the case may be, in full, in cash or cash equivalents after giving effect 
to any concurrent payment, distribution or provision therefor to or for the 
holders of such Senior Debt or Guarantor Senior Debt, as the case may be.

          To the extent any payment of or distribution in respect of Senior 
Debt or Guarantor Senior Debt (whether by or on behalf of the Company or any 
Subsidiary Guarantor, as proceeds of security or enforcement of any right of 
setoff or otherwise) is declared to be fraudulent or preferential, set aside 
or required to be paid to any receiver, trustee in bankruptcy, liquidating 
trustee, agent or other similar Person under any bankruptcy, insolvency, 
receivership, fraudulent conveyance or similar law, then if such payment or 
distribution is recovered by, or paid over to, such receiver, trustee in 
bankruptcy, liquidating trustee, agent or other similar Person, the Senior 
Debt or Guarantor Senior Debt or part thereof originally intended to be 
satisfied shall be deemed to be reinstated and outstanding as if such payment 
had not occurred.  To the extent the obligation to repay any Senior Debt is 
declared to be fraudulent, invalid or otherwise set aside under any 
bankruptcy, insolvency, receivership, fraudulent conveyance or similar law, 
then the obligation so declared fraudulent, invalid or otherwise set aside 
(and all other amounts that would come due with respect thereto 


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                                                                             96

had such obligation not been so affected) shall be deemed to be reinstated 
and outstanding as Senior Debt for all purposes hereof as if such 
declaration, invalidity or setting aside had not occurred.

          Section 10.4.  DEFAULT ON DESIGNATED SENIOR DEBT.

          The Company and the Subsidiary Guarantors may not make any payment 
(whether by redemption, purchase, retirements, defeasance or otherwise) upon 
or in respect of the Securities and the related Subsidiary Guarantees (other 
than securities that are subordinated at least to the same extent as the 
Securities to Senior Debt and any securities issued in exchange for Senior 
Debt and payments and other distributions made from any defeasance trust 
created pursuant to Section 8.1 hereof if the applicable deposit does not 
violate Article 8 or 10 of this Indenture) until all principal and other 
Obligations with respect to the Senior Debt of the Company have been paid in 
full if:

               (i)  a default in the payment of any principal of, premium, if
     any, or interest on Designated Senior Debt occurs; or

               (ii)  any other default occurs and is continuing with respect to
     Designated Senior Debt that permits, or with the giving of notice or
     passage of time or both (unless cured or waived) would permit, holders of
     the Designated Senior Debt as to which such default relates to accelerate
     its maturity and the Trustee receives a notice of the default (a "PAYMENT
     BLOCKAGE NOTICE") from the Company or the holders of any Designated Senior
     Debt.  If the Trustee receives any such Payment Blockage Notice, no
     subsequent Payment Blockage Notice shall be effective for purposes of this
     Section unless and until 360 days shall have elapsed since the date of
     commencement of the payment blockage period resulting from the immediately
     prior Payment Blockage Notice.  No nonpayment default in respect of any
     Designated Senior Debt that existed or was continuing on the date of
     delivery of any Payment Blockage Notice to the Trustee shall be, or be
     made, the basis for a subsequent Payment Blockage Notice unless such
     default shall have been cured or waived for a period of no less than 90
     days.

          The Company shall resume payments on and distributions in respect 
of the Securities and any Subsidiary Guarantor shall resume making payments 
and distributions pursuant to the Subsidiary Guarantees upon:

          (1)  in the case of a default referred to in Section 10.4(i) hereof
     the date upon which the default is cured or waived, or

          (2)  in the case of a default referred to in Section 10.4(ii) hereof,
     the earliest of (1) the date on which such nonpayment default is cured or
     waived or (2) 179 days after the date on which the applicable Payment
     Blockage Notice is 


<PAGE>
                                                                             97

     received unless (A) the maturity of any Designated Senior Debt has been 
     accelerated or (B) a Default or Event of Default under Section 6.1(9) OR 
     (10) has occurred and is continuing,

if this Article otherwise permits the payment, distribution or acquisition at
the time of such payment or acquisition.

          Section 10.5.  ACCELERATION OF SECURITIES.

          If payment of the Securities is accelerated because of an Event of 
Default, the Company shall promptly notify holders of Senior Debt and 
Guarantor Senior Debt of the acceleration.

          Section 10.6.  WHEN DISTRIBUTION MUST BE PAID OVER.

          In the event that the Trustee or any Holder receives any payment or 
distribution of or in respect of any Obligations with respect to the 
Securities or the Subsidiary Guarantees at a time when such payment or 
distribution is prohibited by Section 10.3 or Section 10.4 hereof, such 
payment or distribution shall be held by the Trustee (if the Trustee has 
actual knowledge that such payment or distribution is prohibited by Section 
10.3 or 10.4) or such Holder, in trust for the benefit of, and shall be paid 
forthwith over and delivered to, the holders of Senior Debt or Guarantor 
Senior Debt, as the case may be, as their interests may appear or their 
Representative under the indenture or other agreement (if any) pursuant to 
which such Senior Debt or Guarantor Senior Debt, as the case may be, may have 
been issued, as their respective interests may appear, for application to the 
payment of all Obligations with respect to Senior Debt or Guarantor Senior 
Debt, as the case may be, remaining unpaid to the extent necessary to pay 
such Obligations in full in accordance with their terms, after giving effect 
to any concurrent payment or distribution to or for the holders of Senior 
Debt or Guarantor Senior Debt, as the case may be.

          With respect to the holders of Senior Debt and Guarantor Senior 
Debt, the Trustee undertakes to perform only such obligations on the part of 
the Trustee as are specifically set forth in this Article 10, and no implied 
covenants or obligations with respect to the holders of Senior Debt or 
Guarantor Senior Debt, as the case may be shall be read into this Indenture 
against the Trustee.  The Trustee shall not be deemed to owe any fiduciary 
duty to the holders of Senior Debt or Guarantor Senior Debt, and, except as 
provided in Section 10.12, shall not be liable to any such holders if the 
Trustee shall pay over or distribute to or on behalf of Holders of Securities 
or the Company, the Subsidiary Guarantors or any other Person money or assets 
to which any holders of Senior Debt and Guarantor Senior Debt shall be 
entitled by virtue of this Article 10, except if such payment is made as a 
result of the willful misconduct or gross negligence of the Trustee.


<PAGE>
                                                                             98

          Section 10.7.  NOTICE BY COMPANY.

          The Company and the Subsidiary Guarantors shall promptly notify the 
Trustee and the Paying Agent of any facts known to the Company or any 
Subsidiary Guarantor that would cause a payment of any Obligations with 
respect to the Securities or the related Subsidiary Guarantees to violate 
this Article, but failure to give such notice shall not affect the 
subordination of the Securities and the related Subsidiary Guarantees to the 
Senior Debt and Guarantor Senior Debt as provided in this Article.

          Section 10.8.  SUBROGATION.

          After all Senior Debt and Guarantor Senior Debt is paid in full and 
until the Securities are paid in full, Holders of Securities and the related 
Subsidiary Guarantees shall be subrogated (equally and ratably with all other 
Indebtedness pari passu with the Securities and the Subsidiary Guarantees) to 
the rights of holders of Senior Debt or Guarantor Senior Debt, as the case 
may be, to receive distributions and payments applicable to Senior Debt or 
Guarantor Senior Debt, as the case may be, to the extent that distributions 
and payments otherwise payable to the Holders of Securities and the related 
Subsidiary Guarantees have been applied to the payment of Senior Debt or 
Guarantor Senior Debt, as the case may be.  A payment or distribution made 
under this Article to holders of Senior Debt or Guarantor Senior Debt, as the 
case may be, that otherwise would have been made to Holders of Securities and 
the related Subsidiary Guarantees is not, as between the Company and Holders 
of Securities, a payment by the Company on the Securities or, as between a 
Subsidiary Guarantor and Holders of the related Subsidiary Guarantee, a 
payment by such Subsidiary Guarantor on such Subsidiary Guarantee.

          Section 10.9.  RELATIVE RIGHTS.

          This Article defines the relative rights of Holders of Securities 
and the related Subsidiary Guarantees and holders of Senior Debt and 
Guarantor Senior Debt.  Nothing in this Indenture shall:

          (1)  impair, as between the Company or the Subsidiary Guarantors, 
     as the case may be, and Holders of Securities, the obligation of the 
     Company and the Subsidiary Guarantors, which is absolute and 
     unconditional, to pay principal of and interest on the Securities in 
     accordance with their terms and, in the case of the Subsidiary 
     Guarantors, the terms of the Subsidiary Guarantees;

          (2)  affect the relative rights of Holders of Securities and the 
     related Subsidiary Guarantees and creditors of the Company other than 
     their rights in relation to holders of Senior Debt or Guarantor Senior 
     Debt, as the case may be; or


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                                                                             99

          (3)  prevent the Trustee or any Holder from exercising its 
     available remedies upon a Default or Event of Default, subject to the 
     rights of holders and owners of Senior Debt or Guarantor Senior Debt, as 
     the case may be, to receive distributions and payments otherwise payable 
     to Holders of Securities and the related Subsidiary Guarantees.

          If the Company fails because of this Article to pay principal of or
interest on a Security on the due date, the failure is still a Default or Event
of Default.

          Section 10.10.  SUBORDINATION MAY NOT BE IMPAIRED BY COMPANY OR THE
SUBSIDIARY GUARANTORS.

          No right of any present or future holders of any Senior Debt or 
Guarantor Senior Debt, as the case may be, to enforce subordination as 
provided in this Article 10 will at any time in any way be prejudiced or 
impaired by any act or failure to act on the part of the Company or any 
Subsidiary Guarantor or by any act or failure to act, in good faith, by any 
such holder, or by any noncompliance by the Company or any Subsidiary 
Guarantor with the terms of this Indenture, regardless of any knowledge 
thereof that any such holder of Senior Debt or Guarantor Senior Debt, as the 
case may be, may have or otherwise be charged with.  The provisions of this 
Article Ten are intended to be for the benefit of, and shall be enforceable 
directly by, the holders of Senior Debt and Guarantor Senior Debt.

          Section 10.11.  PAYMENT, DISTRIBUTION OR NOTICE TO REPRESENTATIVE.

          Whenever a payment or distribution is to be made or a notice given 
to holders of Senior Debt or Guarantor Senior Debt, as the case may be, the 
distribution may be made and the notice given to their Representative.

          Upon any payment or distribution of assets or securities of the 
Company or any Subsidiary Guarantor referred to in this Article 10, the 
Trustee and the Holders of Securities and the related Subsidiary Guarantees 
shall be entitled to rely upon any order or decree made by any court of 
competent jurisdiction or upon any certificate of such Representative or of 
the liquidating trustee or agent or other Person making any payment or 
distribution to the Trustee or to the Holders of Securities and the related 
Subsidiary Guarantees for the purpose of ascertaining the Persons entitled to 
participate in such payment or distribution, the holders of the Senior Debt, 
Guarantor Senior Debt and other Indebtedness of the Company or any Subsidiary 
Guarantor, the amount thereof or payable thereon, the amount or amounts paid 
or distributed thereon and all other facts pertinent thereto or to this 
Article 10.


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                                                                            100

          Section 10.12.  RIGHTS OF TRUSTEE AND PAYING AGENT.

          Notwithstanding the provisions of this Article 10 or any other 
provision of this Indenture, the Trustee shall not be charged with knowledge 
of the existence of any facts that would prohibit the making of any payment 
or distribution by the Trustee, and the Trustee and the Paying Agent may 
continue to make payments on the Securities and the Subsidiary Guarantees, 
unless the Trustee shall have received at its Corporate Trust Office at least 
one Business Day prior to the date of such payment written notice of facts 
that would cause the payment of any Obligations with respect to the 
Securities or Subsidiary Guarantees to violate this Article, which notice 
shall specifically refer to Section 10.3 or 10.4 hereof.  Only the Company or 
a Representative may give the notice.  Nothing in this Article 10 shall 
impair the claims of, or payments to, the Trustee under or pursuant to 
Section 7.7 hereof.

          The Trustee in its individual or any other capacity may hold Senior 
Debt and Guarantor Senior Debt with the same rights it would have if it were 
not Trustee.  Any Agent may do the same with like rights.

          Section 10.13.  AUTHORIZATION TO EFFECT SUBORDINATION.

          Each Holder by the Holder's acceptance thereof authorizes and 
directs the Trustee on the Holder's behalf to take such action as may be 
necessary or appropriate to effectuate the subordination as provided in this 
Article 10, and appoints the Trustee to act as the Holder's attorney-in-fact 
for any and all such purposes.  If the Trustee does not file a proper proof 
of claim or proof of debt in the form required in any proceeding referred to 
in Section 6.9 hereof at least 30 days before the expiration of the time to 
file such claim, each lender under the Existing Credit Facility is hereby 
authorized to file an appropriate claim for and on behalf of the Holders of 
the Securities and the related Subsidiary Guarantees.

          Section 10.14.  AMENDMENTS.

          No amendment may be made to the provisions of or the definitions of 
any terms appearing in this Article 10, or to the provisions of Section 6.2 
relating to the Designated Senior Debt, that adversely affects the rights of 
any holder of Senior Debt or Guarantor Senior Debt, as the case may be, then 
outstanding unless the holders of such Senior Debt or Guarantor Senior Debt, 
as the case may be, (or any group or Representative authorized to give a 
consent) consent to such change.


<PAGE>
                                                                           101

          Section 10.15.  NO WAIVER OF SUBORDINATION PROVISIONS.

          Without in any way limiting the generality of Section 10.9 of this 
Indenture, the holders of Senior Debt or Guarantor Senior Debt, as the case 
may be, may, at any time and from time to time, without the consent of or 
notice to the Trustee or the Holders, without incurring responsibility to the 
Holders and without impairing or releasing the subordination provided in this 
Article Ten or the obligations hereunder of the Holders to the holders of 
Senior Debt or Guarantor Senior Debt, as the case may be, do any one or more 
of the following: (a) change the manner, place or terms of payment or extend 
the time of payment of, or renew or alter, Senior Debt or Guarantor Senior 
Debt, as the case may be, or any instrument evidencing the same or any 
agreement under which Senior Debt or Guarantor Senior Debt, as the case may 
be, is outstanding or secured; (b) sell, exchange, release or otherwise deal 
with any property pledged, mortgaged or otherwise securing Senior Debt or 
Guarantor Senior Debt, as the case may be; (c) release any Person liable in 
any manner for the collection of Senior Debt or Guarantor Senior Debt, as the 
case may be; and (d) exercise or refrain from exercising any rights against 
the Company and each Subsidiary Guarantor and any other Person.

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                                                                           102

                                   ARTICLE 11
                           THE SUBSIDIARY GUARANTEES

          Section 11.1.  THE SUBSIDIARY GUARANTEES.

<PAGE>
                                                                           103

          Each of the Subsidiary Guarantors hereby, jointly and severally, 
unconditionally guarantees to each Holder of a Security authenticated and 
delivered by the Trustee and to the Trustee and its successors and assigns, 
irrespective of the validity and enforceability of this Indenture, the 
Securities or the obligations of the Company hereunder or thereunder, that:  
(a) the principal of and premium and interest, on the Securities shall be 
promptly paid in full when due, whether at maturity, by acceleration, 
redemption or otherwise, and interest on the overdue principal of and 
interest on premium and interest, on the Securities, if any, if lawful, and 
all other obligations of the Company to the Holders or the Trustee hereunder 
or thereunder shall be promptly paid in full or performed, all in accordance 
with the terms hereof and thereof; and (b) in case of any extension of time 
of payment or renewal of any Securities or any of such other obligations, 
that the same shall be promptly paid in full when due or performed in 
accordance with the terms of the extension or renewal, whether at stated 
maturity, by acceleration or otherwise.  Failing payment when due of any 
amount so guaranteed or any performance so guaranteed for whatever reason, 
the Subsidiary Guarantors shall be jointly and severally obligated to pay the 
same immediately.  The Subsidiary Guarantors hereby agree that their 
obligations hereunder shall be unconditional, irrespective of the validity, 
regularity or enforceability of the Securities or this Indenture, the absence 
of any action to enforce the same, any waiver or consent by any Holder with 
respect to any provisions hereof or thereof, the recovery of any judgment 
against the Company, any action to enforce the same or any other circumstance 
which might otherwise constitute a legal or equitable discharge or defense of 
a guarantor. Each of the Subsidiary Guarantors hereby waives diligence, 
presentment, demand of payment, filing of claims with a court in the event of 
insolvency or bankruptcy of the Company, ay right to require a proceeding 
first against the Company, protest, notice and all demands whatsoever and 
covenant that this Subsidiary Guarantee shall not be discharged except by 
complete performance of the obligations contained in the Securities and this 
Indenture.  If any Holder or the Trustee is required by any court or 
otherwise to return to the Company or the Subsidiary Guarantors, or any 
Custodian, Trustee, liquidator or other similar official acting in relation 
to either the Company or the Subsidiary Guarantors, any amount paid by either 
to the Trustee or such Holder, this Subsidiary Guarantee, to the extent 
theretofore discharged, shall be reinstated in full force and effect.  Each 
of the Subsidiary Guarantors agrees that it shall not be entitled to any 
right of subrogation in relation to the Holders of Securities in respect of 
any obligations guaranteed hereby until payment in full of all obligations 
guaranteed hereby.  Each of the Subsidiary Guarantors further agrees that, as 
between the Subsidiary Guarantors, on the one hand, and the Holders and the 
Trustee, on the other hand, (x) the maturity of the obligations guaranteed 
hereby may be accelerated as provided in Article 6 for the purposes of this 
Subsidiary Guarantee, notwithstanding any stay, injunction or other 
prohibition preventing such acceleration in respect of the obligations 
guaranteed hereby and (y) in the event of any declaration of 


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                                                                           104

acceleration of such obligations as provided in Article 6, such obligations 
(whether or not due and payable) shall forthwith become due and payable by 
the Subsidiary Guarantors for the purpose of this Subsidiary Guarantee.  The 
Subsidiary Guarantors shall have the right to seek contribution from any 
Subsidiary Guarantor not paying so long as the exercise of such right does 
not impair the rights of the Holders under the Subsidiary Guarantees.

          Section 11.2.  SUBORDINATION OF SUBSIDIARY GUARANTEES.

          The obligations of each of the Subsidiary Guarantors under its 
Subsidiary Guarantee pursuant to this Article 11 shall be junior and 
subordinated to the Guarantor Senior Debt of the Subsidiary Guarantor 
pursuant to Article 10 hereof.  For the purposes of the foregoing sentence, 
the Trustee and the Holders shall have the right to receive and/or retain 
payments or distributions by or on behalf of any of the Subsidiary Guarantors 
only at such times as they may receive and/or retain payments in respect of 
the Securities pursuant to this Indenture, including Article 10 hereof.

          Section 11.3.  SUBSIDIARY GUARANTORS MAY CONSOLIDATE, ETC., ON 
CERTAIN TERMS.

          No Subsidiary Guarantor may consolidate with or merge with or into 
(whether or not such Subsidiary Guarantor is the Surviving Person), another 
Person other than the Company or another Subsidiary Guarantor, whether or not 
affiliated with such Subsidiary Guarantor, unless:

          (a)  subject to the provisions of Section 11.4 hereof, the Person
     formed by or surviving any such consolidation or merger (if other than such
     Subsidiary Guarantor) assumes all the obligations of such Subsidiary
     Guarantor pursuant to a supplemental indenture in form reasonably
     satisfactory to the Trustee in respect of the Securities, this Indenture
     and such Subsidiary Guarantor's Guarantee;

          (b)  immediately after giving effect to such transaction, no Default
     or Event of Default exists; and

          (c)  such transaction does not violate any of Sections 4.3, 4.7, 4.8,
     4.9, 4.10, 4.11, 4.12, 4.13, 4.14, 4.16, 4.17, 4.18 and 4.19.

Notwithstanding the foregoing, none of the Subsidiary Guarantors shall be 
permitted to consolidate with or merge with or into (whether or not such 
Subsidiary Guarantor is the surviving Person), another corporation, Person or 
entity pursuant to the preceding sentence if such consolidation or merger 
would not be permitted by Section 5.1 hereof.

          In case of any such consolidation or merger and upon the assumption 
by the successor corporation, by supplemental indenture, executed and 
delivered to the Trustee and satisfactory 


<PAGE>
                                                                           105

in form to the Trustee, of the Subsidiary Guarantee endorsed upon the 
Securities and the due and punctual performance of all of the covenants and 
conditions of this Indenture to be performed by such Subsidiary Guarantor, 
such successor corporation shall succeed to and be substituted for such 
Subsidiary Guarantor with the same effect as if it had been named herein as a 
Subsidiary Guarantor.  Such successor corporation thereupon may cause to be 
signed any or all of the Subsidiary Guarantees to be endorsed upon all of the 
Securities issuable hereunder which theretofore shall not have been signed by 
the Company and delivered to the Trustee.  All the Subsidiary Guarantees so 
issued shall in all respects have the same legal rank and benefit under this 
Indenture as the Subsidiary Guarantees theretofore and thereafter issued in 
accordance with the terms of this Indenture as though all of such Subsidiary 
Guarantees had been issued at the date of the execution hereof.

          Except as set forth in Articles 4 and 5 hereof, nothing contained 
in this Indenture or in any of the Securities shall prevent any consolidation 
or merger of any Subsidiary Guarantor with or into the Company or another 
Subsidiary Guarantor, or shall prevent any sale or conveyance of the property 
of any Subsidiary Guarantor as an entirety or substantially as an entirety to 
the Company or any Subsidiary Guarantor.

          Section 11.4.  RELEASES OF SUBSIDIARY GUARANTEES.

          In the event of a sale or other disposition of all or substantially 
all of the assets of any Subsidiary Guarantor or a sale or other disposition 
of all of the capital stock of any Subsidiary Guarantor, to any corporation 
or other Person (including an Unrestricted Subsidiary) by way of merger, 
consolidation, or otherwise, in a transaction that does not violate any of 
the covenants of this Indenture, then such Subsidiary Guarantor (in the event 
of a sale or other disposition, by way of such merger, consolidation or 
otherwise, of all the capital stock of such Subsidiary Guarantor) shall be 
released and relieved of any obligations under its Subsidiary Guarantee and 
such acquiring corporation or other Person (in the event of a sale or other 
disposition of all or substantially all of the assets of such Subsidiary 
Guarantor), if other than a Subsidiary Guarantor, shall have no obligation to 
assume or otherwise become liable under such Subsidiary Guarantee; PROVIDED 
that the Net Proceeds of such sale or other disposition are applied in 
accordance with Section 4.10 hereof. Upon delivery by the Company to the 
Trustee of an Officers' Certificate and an Opinion of Counsel to the effect 
that such sale or other disposition was made by the Company in accordance 
with the provisions of this Indenture, including without limitation Section 
4.10, the Trustee shall execute any documents reasonably required in order to 
evidence the release of any Subsidiary Guarantor from its obligations under 
its Subsidiary Guarantee.

          Any Subsidiary Guarantor not released from its obligations under 
its Subsidiary Guarantee shall remain liable for the full amount of principal 
of and interest on the 

<PAGE>
                                                                           106

Securities and for the other obligations of such Subsidiary Guarantor under 
this Indenture as provided in this Article 11.

          Any Subsidiary Guarantor that is designated an Unrestricted 
Subsidiary in accordance with the terms of this Indenture shall, upon such 
designation, be released from and relieved of its obligations under its 
Subsidiary Guarantee and any Unrestricted Subsidiary whose obligation as such 
is revoked and any newly created or newly acquired Subsidiary that is or 
becomes a Restricted Subsidiary shall be required to execute a Subsidiary 
Guarantee in accordance with the terms of this Indenture.

          Section 11.5.  LIMITATION ON SUBSIDIARY GUARANTOR LIABILITY.

          For purposes hereof, each Subsidiary Guarantor's liability shall be 
that amount from time to time equal to the aggregate liability of such 
Subsidiary Guarantor thereunder, but shall be limited to the lesser of (i) 
the aggregate amount of the Obligations of the Company under the Securities 
and this Indenture and (ii) the amount, if any, which would not have (A) 
rendered such Subsidiary Guarantor "INSOLVENT" (as such term is defined in 
the federal Bankruptcy Law and in the Debtor and Creditor Law of the State of 
New York) or (B) left it with unreasonably small capital at the time its 
Subsidiary Guarantee of the Securities was entered into, after giving effect 
to the incurrence of existing Indebtedness immediately prior to such time; 
PROVIDED that, it shall be a presumption in any lawsuit or other proceeding 
in which such Subsidiary Guarantor is a party that the amount guaranteed 
pursuant to its Subsidiary Guarantee is the amount set forth in clause (i) 
above unless any creditor, or representative of creditors of such Subsidiary 
Guarantor, or debtor in possession or trustee in bankruptcy of such 
Subsidiary Guarantor, otherwise proves in such a lawsuit that the aggregate 
liability of such Subsidiary Guarantor is limited to the amount set forth in 
clause (ii).  In making any determination as to the solvency or sufficiency 
of capital of a Subsidiary Guarantor in accordance with the previous 
sentence, the right of such Subsidiary Guarantor to contribution from other 
Subsidiary Guarantors and any other rights such Subsidiary Guarantor may 
have, contractual or otherwise, shall be taken into account.

          Section 11.6.  "TRUSTEE" TO INCLUDE PAYING AGENT.

          In case at any time any Paying Agent other than the Trustee shall 
have been appointed by the Company and be then acting hereunder, the term 
"TRUSTEE" as used in Article 10 and this Article 11 shall in such case 
(unless the context shall otherwise require) be construed as extending to and 
including such Paying Agent within its meaning as fully and for all intents 
and purposes as if such Paying Agent were named in Article 10 and this 
Article 11 in place of the Trustee.

<PAGE>
                                                                           107

                                   ARTICLE 12
                                 MISCELLANEOUS

          Section 12.1.  TRUST INDENTURE ACT CONTROLS.

          If any provision of this Indenture limits, qualifies or conflicts 
with the duties imposed by TIA Section 318(c), the imposed duties shall 
control.  If any provisions of this Indenture modifies or excludes any 
provision of the TIA that may be so modified or excluded, the latter 
provision shall be deemed to apply to this Indenture as so modified or 
excluded, as the case may be.

          Section 12.2.  NOTICES.

          Any notice or communication by the Company or the Subsidiary 
Guarantors or the Trustee to the others is duly given if in writing and 
delivered in Person or mailed by first class mail (registered or certified, 
return receipt requested), telecopier or overnight air courier guaranteeing 
next day delivery, to the others' address:

          If to the Company or any Subsidiary Guarantor:

               Continental Resources, Inc.
               302 North Independence, 3rd Floor
               P.O. Box 1032
               Enid, OK 73702
               Telecopier No.:  (580) 548-5281
               Attention:  Harold Hamm and Roger Clement
               
          With a copies to:

               McAfee & Taft A Professional Corporation
               Tenth Floor, Two Leadership Square
               211 North Robinson
               Oklahoma City, Oklahoma 73102-7103
               Telecopier No.:  (405) 235-0439
               Attention:  Theodore Elam 
               
          If to the Trustee:
               
               United States Trust Company of New York
               114 West 47th Street, 25th Floor
               New York, NY 10036
               Telecopier No.: (212) 852-1626 
               Attention:  Corporate Trust Administration
               Ref:  Continental Resources, Inc.
               
          The Company or any Subsidiary Guarantor or the Trustee, by notice 
to the others may designate additional or different addresses for subsequent 
notices or communications.

          All notices and communications (other than those sent to Holders) 
shall be deemed to have been duly given:  at the time 


<PAGE>
                                                                           108

delivered by hand, if personally delivered; five Business Days after being 
deposited in the mail, postage prepaid, if mailed; when receipt acknowledged, 
if by telecopy; and the next Business Day after timely delivery to the 
courier, if sent by overnight air courier guaranteeing next day delivery 
(except that a notice of change of address and any notice to the Trustee 
shall not be deemed to have been given until actually received by the 
addressee).

          Any notice or communication to a Holder shall be mailed by first 
class mail, certified or registered, return receipt requested, or by 
overnight air courier guaranteeing next day delivery to its address shown on 
the register kept by the Registrar.  Any notice or communication shall also 
be so mailed to any Person described in TIA Section 313(c), to the extent 
required by the TIA. Failure to mail a notice or communication to a Holder or 
any defect in it shall not affect its sufficiency with respect to other 
Holders.

          If a notice or communication is mailed in the manner provided above 
within the time prescribed, it is duly given, whether or not the addressee 
receives it.

          If the Company or any Subsidiary Guarantor mails a notice or 
communication to Holders, it shall mail a copy to the Trustee and each Agent 
at the same time.

          Section 12.3.  COMMUNICATION BY HOLDERS OF SECURITIES WITH OTHER 
HOLDERS OF SECURITIES.

          Holders may communicate pursuant to TIA Section 312(b) with other 
Holders with respect to their rights under this Indenture or the Securities. 
The Company, the Subsidiary Guarantors, the Trustee, the Registrar and anyone 
else shall have the protection of TIA Section 312(c).

          Section 12.4.  CERTIFICATE AND OPINION AS TO CONDITIONS PRECEDENT.

          Upon any request or application by the Company or any Subsidiary 
Guarantor to the Trustee to take any action under this Indenture, the Company 
or such Subsidiary Guarantor, as the case may be, shall furnish to the 
Trustee:

          (a)  an Officers' Certificate in form and substance reasonably
     satisfactory to the Trustee (which shall include the statements set forth
     in Section 12.5 hereof) stating that, in the opinion of the signers, all
     conditions precedent and covenants, if any, provided for in this Indenture
     relating to the proposed action have been complied with; and

          (b)  an Opinion of Counsel in form and substance reasonably
     satisfactory to the Trustee (which shall include the statements set forth
     in Section 12.5 hereof) stating that, in the opinion of such counsel, all
     such conditions 


<PAGE>
                                                                           109

     precedent have been complied with.

          Section 12.5.  STATEMENTS REQUIRED IN CERTIFICATE OR OPINION.

          Each certificate or opinion with respect to compliance with a 
condition or covenant provided for in this Indenture (other than a 
certificate provided pursuant to TIA Section 314(a)(4)) shall comply with 
the provisions of TIA Section 314(e) and shall include:

          (a)  a statement that the Person making such certificate or opinion
     has read such covenant or condition;

          (b)  a brief statement as to the nature and scope of the examination
     or investigation upon which the statements or opinions contained in such
     certificate or opinion are based;

          (c)  a statement that, in the opinion of such Person, he or she has
     made such examination or investigation as is necessary to enable him or her
     to express an informed opinion as to whether or not such covenant or
     condition has been complied with; and

          (d)  a statement as to whether or not, in the opinion of such Person,
     such condition or covenant has been complied with; PROVIDED, that with
     respect to matters of fact an Opinion of Counsel may rely on an Officer's
     Certificate and/or certificates of public officials.

          Section 12.6.  RULES BY TRUSTEE AND AGENTS.

          The Trustee may make reasonable rules for action by or at a meeting 
of Holders.  The Registrar or Paying Agent may make reasonable rules and set 
reasonable requirements for its functions.

          Section 12.7.  NO PERSONAL LIABILITY OF DIRECTORS, OFFICERS, 
EMPLOYEES AND STOCKHOLDERS.

          No director, officer, employee, incorporator or stockholder of the 
Company or any Subsidiary, as such, shall have any liability for any 
obligations of the Company under the Securities or this Indenture or for any 
claim based on, in respect of, or by reason of, such obligations or their 
creation.  Each Holder of Securities, by accepting a Security, waives and 
releases all such liability. The waiver and release are part of the 
consideration for issuance of the Securities.  Such waiver may not be 
effective to waive liabilities under the federal securities laws and it is 
the view of the Commission that such a waiver is against public policy.

<PAGE>
                                                                           110

          Section 12.8.  GOVERNING LAW.

          THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED 
TO CONSTRUE THIS INDENTURE, THE SECURITIES AND THE SUBSIDIARY GUARANTEES.

          Section 12.9.  NO ADVERSE INTERPRETATION OF OTHER AGREEMENTS.

          This Indenture may not be used to interpret any other indenture, 
loan or debt agreement of the Company or their respective Subsidiaries or of 
any other Person.  Any such indenture, loan or debt agreement may not be used 
to interpret this Indenture and the Subsidiary Guarantees.

          Section 12.10.  SUCCESSORS.

          All agreements of the Company and each Subsidiary Guarantor in this 
Indenture, the Securities and the Subsidiary Guarantees shall bind its 
respective successors.  All agreements of the Trustee in this Indenture shall 
bind its successors.

          Section 12.11.  SEVERABILITY.

          In case any provision in this Indenture or in the Securities shall 
be invalid, illegal or unenforceable, the validity, legality and 
enforceability of the remaining provisions shall not in any way be affected 
or impaired thereby.

          Section 12.12.  COUNTERPART ORIGINALS.

          The parties may sign any number of copies of this Indenture.  Each 
signed copy shall be an original, but all of them together represent the same 
agreement.

          Section 12.13.  TABLE OF CONTENTS, HEADINGS, ETC. 

          The Table of Contents, Cross-Reference Table and Headings of the 
Articles and Sections of this Indenture have been inserted for convenience of 
reference only, are not to be considered a part of this Indenture and shall 
in no way modify or restrict any of the terms or provisions hereof.


                         [Signatures on following page]
<PAGE>

     SIGNATURES

Dated as of
July 24, 1998


                                       CONTINENTAL RESOURCES, INC.

Attest:                                By: /s/ RANDY MOEDER
                                       Name: Randy Moeder
/s/ CHRISTINE ROBERTS                  Title: Senior Vice President,
                                              General Counsel and Secretary


                                       CONTINENTAL CRUDE CO.

Attest:                                By: /s/ JEFF WHITE
                                       Name: Jeff White
/s/ RANDY MOEDER                       Title: President


                                       CONTINENTAL GAS, INC.

Attest:                                By: /s/ RANDY MOEDER
                                       Name: Randy Moeder
/s/ CHRISTINE ROBERTS                  Title: President


                                       UNITED STATES TRUST COMPANY OF NEW YORK

Attest:                                By: /s/ LOUIS P. YOUNG
                                       Name: Louis P. Young
/s/ M. CIESMELEWSKI                    Title: Vice President

<PAGE>

                                   EXHIBIT A

                      [FORM OF FACE OF INITIAL SECURITY]

                                 SERIES A NOTE

                          [Global Securities Legend]

         UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE 
OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), NEW YORK, 
NEW YORK, TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE 
OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. 
OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC 
(AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS 
REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR 
OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL 
INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

         TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN 
WHOLE, BUT NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR SUCH 
SUCCESSOR'S NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL SECURITY SHALL 
BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN 
THE INDENTURE REFERRED TO ON THE REVERSE HEREOF.

         THIS SECURITY IS SUBORDINATED TO SENIOR INDEBTEDNESS, AS DEFINED IN 
THE INDENTURE (AS DEFINED HEREIN), AND THE OBLIGATIONS OF EACH SUBSIDIARY 
GUARANTOR UNDER THE SUBSIDIARY GUARANTEE CONTAINED IN THE INDENTURE ARE 
SUBORDINATED TO GUARANTOR SENIOR INDEBTEDNESS, AS DEFINED IN THE INDENTURE, 
OF SUCH SUBSIDIARY GUARANTOR.

                        [Restricted Securities Legend]

         THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 
1933, AS AMENDED (THE "SECURITIES ACT"), OR THE SECURITIES LAWS OF ANY STATE 
OR OTHER JURISDICTION.  NEITHER THIS SECURITY NOR ANY INTEREST OR 
PARTICIPATION HEREIN MAY BE REOFFERED, SOLD, ASSIGNED, TRANSFERRED, PLEDGED, 
ENCUMBERED OR OTHERWISE DISPOSED OF IN THE ABSENCE OF SUCH REGISTRATION OR 
UNLESS SUCH TRANSACTION IS EXEMPT FROM, OR NOT SUBJECT TO, SUCH REGISTRATION.

         THE HOLDER OF THIS SECURITY BY ITS ACCEPTANCE HEREOF AGREES TO 
OFFER, SELL OR OTHERWISE TRANSFER SUCH SECURITY, PRIOR TO THE DATE (THE 
"RESALE RESTRICTION TERMINATION DATE") WHICH IS TWO YEARS AFTER THE LATER OF 
THE ORIGINAL ISSUE DATE HEREOF AND THE LAST DATE ON WHICH THE COMPANY OR ANY 
AFFILIATE OF THE COMPANY WAS THE OWNER OF THIS SECURITY (OR ANY PREDECESSOR 
OF SUCH SECURITY), ONLY (A) TO THE COMPANY, (B) PURSUANT TO A REGISTRATION 
STATEMENT THAT HAS BEEN DECLARED EFFECTIVE UNDER THE SECURITIES ACT, (C) FOR 
SO LONG AS THE SECURITIES ARE ELIGIBLE FOR RESALE PURSUANT TO RULE 144A UNDER 
THE SECURITIES ACT, TO A PERSON IT REASONABLY BELIEVES IS A "QUALIFIED 
INSTITUTIONAL 


                                       A-1

<PAGE>

BUYER" AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT THAT PURCHASES FOR 
ITS OWN ACCOUNT OR FOR THE ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER TO WHOM 
NOTICE IS GIVEN THAT THE TRANSFER IS BEING MADE IN RELIANCE ON RULE 144A, 
(D) PURSUANT TO OFFERS AND SALES THAT OCCUR OUTSIDE THE UNITED STATES WITHIN 
THE MEANING OF REGULATION S UNDER THE SECURITIES ACT, (E) TO AN "ACCREDITED 
INVESTOR" WITHIN THE MEANING OF RULE 501(a)(1), (2), (3) OR (7) UNDER THE 
SECURITIES ACT THAT IS AN INSTITUTIONAL INVESTOR ACQUIRING THE SECURITY FOR 
ITS OWN ACCOUNT OR FOR THE ACCOUNT OF SUCH AN INSTITUTIONAL ACCREDITED 
INVESTOR, IN EACH CASE IN A MINIMUM PRINCIPAL AMOUNT OF $250,000, FOR 
INVESTMENT PURPOSES AND NOT WITH A VIEW TO OR FOR OFFER OR SALE IN CONNECTION 
WITH ANY DISTRIBUTION IN VIOLATION OF THE SECURITIES ACT, OR (F) PURSUANT TO 
ANY OTHER AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE 
SECURITIES ACT, SUBJECT TO THE COMPANY'S AND THE TRUSTEE'S RIGHT PRIOR TO ANY 
SUCH OFFER, SALE OR TRANSFER PURSUANT TO CLAUSES (D), (E) AND (F) TO REQUIRE 
THE DELIVERY OF AN OPINION OF COUNSEL, CERTIFICATION AND/OR OTHER INFORMATION 
SATISFACTORY TO EACH OF THEM. THIS LEGEND WILL BE REMOVED UPON THE REQUEST OF 
THE HOLDER AFTER THE RESALE RESTRICTION TERMINATION DATE.

                             [Regulation S Legend]

         THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT 
OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND, ACCORDINGLY, MAY NOT BE 
OFFERED OR SOLD WITHIN THE UNITED STATES OR TO OR FOR THE ACCOUNT OR BENEFIT 
OF, U.S. PERSONS EXCEPT AS SET FORTH IN THE FOLLOWING SENTENCE.  BY ITS 
ACQUISITION HEREOF, THE HOLDER (1) REPRESENTS THAT IT IS NOT A U.S. PERSON 
NOR IS IT PURCHASING FOR THE ACCOUNT OF A U.S. PERSON AND IS ACQUIRING THIS 
SECURITY IN AN OFFSHORE TRANSACTION IN ACCORDANCE WITH REGULATION S UNDER THE 
SECURITIES ACT ("REGULATION S"), (2) BY ITS ACCEPTANCE HEREOF AGREES TO 
OFFER, SELL OR OTHERWISE TRANSFER SUCH SECURITY, PRIOR TO THE DATE (THE 
"RESALE RESTRICTION TERMINATION DATE") WHICH IS TWO YEARS AFTER THE LATER OF 
THE ORIGINAL ISSUE DATE HEREOF AND THE LAST DATE ON WHICH THE COMPANY OR ANY 
AFFILIATE OF THE COMPANY WAS THE OWNER OF THIS SECURITY (OR ANY PREDECESSOR 
OF SUCH SECURITY), ONLY (A) TO THE COMPANY, (B) PURSUANT TO A REGISTRATION 
STATEMENT THAT HAS BEEN DECLARED EFFECTIVE UNDER THE SECURITIES ACT, (C) FOR 
SO LONG AS THE SECURITIES ARE ELIGIBLE FOR RESALE PURSUANT TO RULE 144A UNDER 
THE SECURITIES ACT, TO A PERSON IT REASONABLY BELIEVES IS A "QUALIFIED 
INSTITUTIONAL BUYER" AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT THAT 
PURCHASES FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF A QUALIFIED INSTITUTIONAL 
BUYER TO WHOM NOTICE IS GIVEN THAT THE TRANSFER IS BEING MADE IN RELIANCE ON 
RULE 144A, (D) PURSUANT TO OFFERS AND SALES THAT OCCUR OUTSIDE THE UNITED 
STATES WITHIN THE MEANING OF REGULATION S, (E) TO AN "ACCREDITED INVESTOR" 
WITHIN THE MEANING OF RULE 501(a)(1), (2), (3) OR (7) UNDER THE SECURITIES 
ACT THAT IS AN INSTITUTIONAL INVESTOR ACQUIRING THE SECURITY FOR ITS OWN 
ACCOUNT OR FOR THE ACCOUNT OF SUCH AN INSTITUTIONAL ACCREDITED INVESTOR, IN 
EACH CASE IN A MINIMUM PRINCIPAL AMOUNT OF THE SECURITIES OF $250,000, FOR 
INVESTMENT PURPOSES AND NOT WITH A VIEW TO OR FOR OFFER OR SALE IN CONNECTION 
WITH ANY DISTRIBUTION IN VIOLATION OF THE 


                                       A-2

<PAGE>

SECURITIES ACT, OR (F) PURSUANT TO ANOTHER AVAILABLE EXEPTION FROM THE 
REGISTRATION REQUIREMENTS OF THE SECURITIES ACT, SUBJECT TO THE COMPANY'S AND 
THE TRUSTEE'S RIGHT PRIOR TO ANY SUCH OFFER, SALE OR TRANSFER PURSUANT TO 
CLAUSES (D), (E) OR (F) TO REQUIRE THE DELIVERY OF AN OPINION OF COUNSEL, 
CERTIFICATION AND/OR OTHER INFORMATION SATISFACTORY TO EACH OF THEM AND IN 
THE CASE OF THE FOREGOING CLAUSE (E), A CERTIFICATE OF TRANSFER IN THE FORM 
APPEARING ON THE OTHER SIDE OF THIS SECURITY IS COMPLETED AND DELIVERED BY 
THE TRANSFEROR TO THE COMPANY AND THE TRUSTEE.  THIS LEGEND WILL BE REMOVED 
AFTER 40 CONSECUTIVE DAYS BEGINNING ON AND INCLUDING THE LATER OF (A) THE DAY 
ON WHICH THE SECURITIES ARE OFFERED TO PERSONS OTHER THAN DISTRIBUTORS (AS 
DEFINED IN REGULATION S) AND (B) THE DATE OF THE CLOSING OF THE ORIGINAL 
OFFERING.  AS USED HEREIN, THE TERMS "OFFSHORE TRANSACTION", "UNITED STATES" 
AND "U.S. PERSON" HAVE THE MEANINGS GIVEN TO THEM BY REGULATION S UNDER THE 
SECURITIES ACT.


                                       A-3

<PAGE>

                          CONTINENTAL RESOURCES, INC.

                  10 1/4% Senior Subordinated Notes due 2008

No. 1                                                               $150,000,000
CUSIP Number: 212013AA4

         Continental Resources, Inc., an Oklahoma corporation, promises to 
pay to Cede & Co., or registered assigns, the principal sum of One Hundred 
Fifty Million Dollars on August 1, 2008.

         Interest Payment Dates: February 1 and August 1.

         Record Dates: January 15 and July 15.

         Additional provisions of this Security are set forth on the other 
side of this Security.

         IN WITNESS WHEREOF, the Company has caused this Security to be 
signed manually or by facsimile by its duly authorized officers and a 
facsimile of its corporate seal to be affixed hereto and imprinted hereon.


Dated: ____________, 1998


                                       CONTINENTAL RESOURCES, INC.


                                       By ______________________________________
                                          Name:
                                          Title:


                                       By ______________________________________
                                          Name:
                                          Title:


TRUSTEE'S CERTIFICATE OF AUTHENTICATION

UNITED STATES TRUST COMPANY OF NEW YORK,
as Trustee, certifies that this is
one of the Securities referred to in the
within-mentioned Indenture:


By _____________________________________
           Authorized Signatory


Dated: ____________, 1998


                                       A-4

<PAGE>

                              (Back of Security)

                       10 1/4% Senior Subordinated Notes due 2008

         Capitalized terms used herein shall have the meanings assigned to 
them in the Indenture referred to below unless otherwise indicated.

         1.  INTEREST.  Continental Resources, Inc., an Oklahoma corporation 
(the "COMPANY"), promises to pay interest on the principal amount of this 
Security at the rate of 10 1/4% per annum, which interest shall be payable in 
cash semiannually in arrears on each February 1 and August 1, or if any such 
day is not a Business Day, on the next succeeding Business Day (each an 
"INTEREST PAYMENT DATE"); PROVIDED that the first Interest Payment Date shall 
be February 1, 1999.  Interest on the Securities will accrue from the most 
recent date to which interest has been paid or, if no interest has been paid, 
from the date of original issuance.  Interest will be computed on the basis 
of a 360-day year comprised of twelve 30-day months.

         2.  METHOD OF PAYMENT.  On each Interest Payment Date the Company 
will pay interest to the Person who is the Holder of record of this Security 
as of the close of business on the January 15 or July 15 immediately 
preceding such Interest Payment Date, even if this Security is cancelled 
after such record date and on or before such Interest Payment Date, except as 
provided in Section 2.12 of the Indenture with respect to defaulted interest. 
Principal, premium, if any, and interest on this Security will be payable at 
the office or agency of the Company maintained for such purpose within The 
City and State of New York or, in the event the Securities do not remain in 
book-entry form, at the option of the Company, payment of interest may be 
made by check mailed to the Holder of this Security at its address set forth 
in the register of Holders of Securities; PROVIDED that all payments with 
respect to the Global Securities and Definitive Securities having an 
aggregate principal amount of $5.0 million or more the Holders of which have 
given wire transfer instructions to the Company at least 10 Business Days 
prior to the applicable payment date will be required to be made by wire 
transfer of immediately available funds to the accounts specified by the 
Holders thereof.  Such payment shall be in such coin or currency of the 
United States of America as at the time of payment is legal tender for 
payment of public and private debts.

         3.  PAYING AGENT AND REGISTRAR.  Initially, United States Trust 
Company of New York, the Trustee under the Indenture, will act as Paying 
Agent and Registrar.  The Company may change any Paying Agent or Registrar 
without notice to any Holder.  The Company or any Subsidiary Guarantor or any 
other of the Company's Subsidiaries may act in any such capacity.

         4.  INDENTURE.  The Company issued the Securities under an Indenture 
dated as of July 24, 1998 ("INDENTURE") among 


                                       A-5

<PAGE>

the Company, the Subsidiary Guarantors and the Trustee.  The terms of the 
Securities include those stated in the Indenture and those made part of the 
Indenture by reference to the Trust Indenture Act of 1939, as amended 
(15 U.S. Code Sections  77aaa-77bbbb).  The Securities are subject to all 
such terms, and Holders are referred to the Indenture and such Act for a 
statement of such terms.  The Securities are general unsecured obligations of 
the Company equal in an aggregate principal amount to $150,000,000 and will 
mature on August 1, 2008.

         The Securities are general unsecured senior subordinated obligations 
of the Company limited to $150,000,000 million aggregate principal amount 
(subject to Section 2.7 of the Indenture).  The aggregate principal amount of 
notes which may be authenticated and delivered under the Indenture, including 
the Securities, is limited to $300.0 million (subject to Section 2.7 of the 
Indenture).  This Security is one of the Initial Securities referred to in 
the Indenture.  The Securities include the Initial Securities and any 
Exchange Securities issued in exchange for the Initial Securities pursuant to 
the Indenture and the Registration Rights Agreement.  The Initial Securities 
and the Exchange Securities are treated as a single class of securities under 
the Indenture.  The Indenture imposes certain limitations on the incurrence 
of Indebtedness by the Company and its Restricted Subsidiaries, the payment 
of dividends and other distributions on the Capital Stock of the Company and 
its Restricted Subsidiaries, the purchase or redemption of Capital Stock of 
the Company and Capital Stock of such Restricted Subsidiaries, certain 
purchases or redemptions of Subordinated Indebtedness, the sale or transfer 
of assets and Capital Stock of Restricted Subsidiaries, the issuance or sale 
of Capital Stock of Restricted Subsidiaries, the Investments of the Company 
and its Subsidiaries and transactions with Affiliates.  In addition, the 
Indenture limits the ability of the Company and its Restricted Subsidiaries 
to restrict distributions and dividends from Restricted Subsidiaries.

         To guarantee the due and punctual payment of the principal, premium, 
if any, and interest on the Securities and all other amounts payable by the 
Company under the Indenture and the Securities when and as the same shall be 
due and payable, whether at maturity, by acceleration or otherwise, according 
to the terms of the Securities and the Indenture, the Subsidiary Guarantors 
have unconditionally guaranteed (and future Subsidiary Guarantors, together 
with the Subsidiary Guarantors, will unconditionally guarantee), jointly and 
severally, such obligations on a senior subordinated basis pursuant to the 
terms of the Indenture.


                                       A-6

<PAGE>

         5.  OPTIONAL REDEMPTION.

         (a)  The Securities are not redeemable at the Company's option prior 
to August 1, 2003.  From and after August 1, 2003, the Securities will be 
subject to redemption at the option of the Company, in whole or in part, upon 
not less than 30 nor more than 60 days' notice, at the redemption prices 
(expressed as percentages of principal amount) set forth below PLUS accrued 
and unpaid interest thereon to the applicable redemption date, if redeemed 
during the twelve-month period beginning on August 1 of the years indicated 
below:

<TABLE>
<CAPTION>

                                               Percentage of
              Year                            Principal Amount
              ----                            ----------------
              <S>                             <C>
              2003....................................105.125%
              2004....................................103.417%
              2005....................................101.708%
              2006 and thereafter.....................100.000%

</TABLE>

         (b)  Notwithstanding the provisions of clause (a) of this Paragraph 5, 
prior to August 1, 2001 the Company may, at its option, on any one or more 
occasions, redeem up to 35% of the original aggregate principal amount of 
Securities at a redemption price equal to 110.250% of the principal amount 
thereof, plus accrued and unpaid interest, if any, thereon to the redemption 
date, with the net proceeds of sales of public common stock of the Company; 
PROVIDED that at least 65% of the original aggregate principal amount of 
Securities must remain outstanding immediately after the occurrence of such 
redemption; and PROVIDED, further, that any such redemption shall occur 
within 60 days after the date of the closing of the related sale of such 
common stock.

         (c)  Notwithstanding the provisions of clause (a) of this Paragraph 5, 
upon the occurrence of a Change of Control at any time on or prior to August 1, 
2003, the Company may, at its option, redeem in whole but not in part, the 
Securities at a redemption price equal to 100% of the principal amount 
thereof, plus the Applicable Premium as of, and accrued but unpaid interest, 
if any, to, the date of redemption (subject to the right of Holders of record 
on the relevant record date to receive interest due on the relevant interest 
payment date) provided that such redemption shall be made no more than 90 days 
after the occurrence of a Change of Control.  The Company shall notify the 
Trustee and, by mail, the Holders of the Securities of its decision to redeem 
the Securities pursuant to this Paragraph 5(c) within 30 days of the 
occurrence of a Change of Control.

         6.  MANDATORY REDEMPTION.

         Except as set forth in paragraph 7 below, the Company shall not be 
required to make mandatory redemption or sinking fund payments with respect 
to the Securities.


                                       A-7

<PAGE>

         7.  REPURCHASE AT OPTION OF HOLDER.

         (a)  Upon the occurrence of a Change of Control, if the Company does 
not redeem the Securities pursuant to paragraph 5(c), each Holder of 
Securities shall have the right to require the Company to repurchase all or 
any part (equal to $1,000 or an integral multiple thereof) of such Holder's 
Securities pursuant to the offer described below (the "Change of Control 
Offer") at an offer price in cash equal to 101% of the aggregate principal 
amount thereof plus accrued and unpaid interest, if any, thereon to the date 
of purchase (the "Change of Control Payment").  The right of the Holders of 
the Securities to require the Company to repurchase such Securities upon a 
Change of Control may not be waived by the Trustee without the approval of 
the Holders of the Securities required by Section 9.2 of the Indenture.  
Within 30 days following any Change of Control, the Company will mail a 
notice to each Holder describing the transaction or transactions that 
constitute the Change of Control and offering to repurchase Securities 
pursuant to the procedures required by the Indenture and described in such 
notice.  The Change of Control Payment shall be made on a business day not 
less than 30 days nor more than 60 days after such notice is mailed.  The 
Company and each Subsidiary Guarantor will comply with the requirements of 
Rule 14e-1 under the Exchange Act and any other securities laws and 
regulations thereunder to the extent such laws and regulations are applicable 
in connection with the repurchase of the Securities as a result of a Change 
of Control.

               (b)  If the Company or a Restricted Subsidiary consummates any 
Asset Sales permitted by the Indenture, when the aggregate amount of Excess 
Proceeds exceeds $15 million, the Company shall make an Asset Sale Offer to 
purchase the maximum principal amount of Securities and any other Pari Passu 
Indebtedness to which the Asset Sale Offer applies that may be purchased out 
of the Excess Proceeds, at an offer price in cash in an amount equal to, in 
the case of the Securities, 100% of the principal amount thereof, plus 
accrued and unpaid interest thereon to the date of purchase or, in the case 
of any Pari Passu Indebtedness, 100% of the principal amount thereof (or with 
respect to discount Pari Passu Indebtedness, the accreted value thereof) on 
the date of purchase, in each case, in accordance with the procedures set 
forth in Section 3.9 of the Indenture or the agreements governing the Pari 
Passu Indebtedness, as applicable.  To the extent that the aggregate 
principal amount (or accreted value, as the case may be) of Securities, and 
Pari Passu Indebtedness tendered pursuant to an Asset Sale Offer is less than 
the Excess Proceeds, the Company may use any remaining Excess Proceeds for 
general corporate purposes.  If the sum of (i) the aggregate principal amount 
of Securities surrendered by Holders thereof and (ii) the aggregate principal 
amount or accreted value, as the case may be, of Pari Passu Indebtedness 
surrendered by holders or lenders thereof exceeds the amount of Excess 
Proceeds, the Trustee and the trustee or other lender representative for the 
Pari Passu Indebtedness shall select the Securities and the other Pari Passu 
Indebtedness to be purchased on a pro rata basis, based on the aggregate 
principal amount (or accreted value, as applicable) thereof surrendered in 
such Asset 


                                       A-8

<PAGE>

Sale Offer.  Upon completion of such Asset Sale Offer, the amount of Excess 
Proceeds shall be reset at zero.

         8.  NOTICE OF REDEMPTION.  Notice of redemption will be mailed at 
least 30 days but not more than 60 days before the redemption date to each 
Holder whose Securities are to be redeemed at its registered address. 
Securities in denominations larger than $1,000 may be redeemed in part but 
only in integral multiples of $1,000, unless all of the Securities held by a 
Holder are to be redeemed.  On and after the redemption date interest ceases 
to accrue on the aggregate principal amount of the Securities called for 
redemption.

         9.  DENOMINATIONS, TRANSFER, EXCHANGE.  The Securities may be issued 
initially in the form of one or more fully registered Global Securities.  The 
Securities may also be issued in registered form without coupons in minimum 
denominations of $1,000 and integral multiples of $1,000.  The transfer of 
Securities may be registered and Securities may be exchanged as provided in 
the Indenture.  The Registrar and the Trustee may require a Holder, among 
other things, to furnish appropriate endorsements and transfer documents and 
the Company may require a Holder to pay any taxes and fees required by law or 
permitted by the Indenture.  The Company need not exchange or register the 
transfer of any Security or portion of a Security selected for redemption, 
except for the unredeemed portion of any Security being redeemed in part.  
Also, it need not exchange or register the transfer of any Security for a 
period of 15 days before a selection of Securities to be redeemed or during 
the period between a record date and the corresponding Interest Payment Date.

         10. PERSONS DEEMED OWNERS.  The registered Holder of a Security may 
be treated as its owner for all purposes.

         11. AMENDMENT, SUPPLEMENT AND WAIVER.  Subject to certain 
exceptions, the Indenture or the Securities may be amended or supplemented 
with the consent of the Holders of at least a majority in aggregate principal 
amount of the Securities then outstanding (including, without limitation, 
consents obtained in connection with a purchase of, or the tender offer or 
exchange offer for, such Securities), and any existing Default or Event of 
Default under, or compliance with any provision of the Indenture or the 
Securities may be waived with the consent of the Holders of a majority in 
principal amount of the then outstanding Securities.  Without the consent of 
any Holder of a Security, the Indenture or the Securities may be amended or 
supplemented to cure any ambiguity, defect or inconsistency, to provide for 
uncertificated Securities in addition to or in place of certificated 
Securities, to provide for the assumption of the Company's obligations to 
Holders of the Securities in case of a merger or consolidation, to make any 
change that would provide any additional rights or benefits to the Holders of 
the Securities or that does not adversely affect the legal rights under the 
Indenture of any such Holder, to add guarantees with respect to the 
Securities or to secure the Securities or to comply with the requirements of 
the Commission in order to effect 


                                       A-9

<PAGE>

or maintain the qualification of the Indenture under the Trust Indenture Act.

          12.  DEFAULTS AND REMEDIES.  Events of Default include:  (i) 
default for 30 consecutive days in the payment when due of interest on the 
Securities (whether or not prohibited by the provisions of Article 10 of the 
Indenture); (ii) default in payment when due of the principal of or premium, 
if any, on the Securities (whether or not prohibited by the provisions of 
Article 10 of the Indenture); (iii) failure by the Company or any Subsidiary 
Guarantor to comply with the provisions of Article 5 of the Indenture; (iv) 
failure by the Company for 30 consecutive days after notice from the Trustee 
or the Holders of at least 25% in aggregate principal amount of the 
Securities then outstanding to comply with the provisions of Sections 4.3, 
4.7, 4.8, 4.9, 4.10, 4.11, 4.12, 4.13, 4.14, 4.16, 4.17, 4.18 and 4.19 of the 
Indenture; (v) failure by the Company for 60 consecutive days after notice 
from the Trustee or the Holders of at least 25% in aggregate principal amount 
of the Securities then outstanding to comply with any of its other agreements 
or covenants in, or provisions of, this Security or in the Indenture; (vi) 
except as permitted by the Indenture, any Subsidiary Guarantee shall be held 
in any judicial proceeding to be unenforceable or invalid or shall cease for 
any reason to be in full force and effect or a Subsidiary Guarantor or any 
Person acting on behalf of a Subsidiary Guarantor, shall deny or disaffirm 
such Subsidiary Guarantor's obligations under its Subsidiary Guarantee; (vii) 
default under any mortgage, indenture or instrument under which there may be 
issued or by which there may be secured or evidenced any Indebtedness for 
money borrowed by the Company or any Restricted Subsidiary whether such 
Indebtedness or guarantee now exists, or is created after the date of the 
Indenture, which default (a) is caused by a failure to pay principal of such 
Indebtedness prior to the expiration of the grace period provided in such 
Indebtedness on the date of such default (a "Payment Default") or (b) results 
in the acceleration of such Indebtedness prio to its express maturity and, in 
each case, the principal amount of any such Indebtedness, together with the 
principal amount of any other such Indebtedness under which there is then 
existing a Payment Default or the maturity of which has been so accelerated, 
aggregates $10 million or more; (viii) a final non-appealable judgment or 
order or final non-appealable judgments or orders are rendered against the 
Company or any Restricted Subsidiary that remain unpaid or discharged for a 
period of 60 days and that require the payment in money, either individually 
or in an aggregate amount, that is more than $10 million; and (ix) certain 
events of bankruptcy or insolvency with respect to  the Company or any 
Restricted Subsidiary.  If any Event of Default (other than an Event of 
Default described in clause (ix) above) occurs and is continuing, the Trustee 
or the Holders of at least 25% in aggregate principal amount of the then 
outstanding Securities may declare all the Securities to be due and payable 
immediately.  Notwithstanding the foregoing, in the case of an Event of 
Default arising from certain events of bankruptcy or insolvency with respect 
to the Company or any Restricted Subsidiary, all outstanding Securities will 
become due and payable without further action or notice.  Holders of the 

                                     A-10

<PAGE>

Securities may not enforce the Indenture or the Securities except as provided 
in the Indenture.  Subject to certain limitations, Holders of a majority in 
aggregate principal amount of the then outstanding Securities may direct the 
Trustee in its exercise of any trust or power.  The Trustee may withhold from 
Holders of the Securities notice of any continuing Default or Event of 
Default (except a Default or Event of Default relating to the payment of 
principal or interest) if it determines that withholding notice is in their 
interest.  The Holders of a majority in aggregate principal amount of the 
Securities then outstanding by notice to the Trustee may on behalf of the 
Holders of all of the Securities waive any existing Default or Event of 
Default and its consequences under the Indenture except a continuing Default 
or Event of Default in the payment of interest or premium on, or the 
principal of, the Securities.  The Company is required to deliver to the 
Trustee annually a statement regarding compliance with the Indenture, and the 
Company is required, within 5 Business days after becoming aware of any 
Default or Event of Default, to deliver to the Trustee a statement specifying 
such Default or Event of Default.

          13.  SUBORDINATION.  The Securities are subordinated to Senior Debt 
of the Company and the Subsidiary Guarantees are subordinated to Guarantor 
Senior Debt of the Subsidiary Guarantors.  To the extent provided in the 
Indenture, Senior Debt must be paid before the Securities may be paid and 
Guarantor Senior Debt of a Subsidiary Guarantor must be paid before a 
Subsidiary Guarantor may pay under its Subsidiary Guarantee.  The Company 
agrees, and each Holder by accepting a Security agrees, that the Indebtedness 
evidenced by the Securities, including, but not limited to, the payment of 
principal of, premium, if any, and interest on the Securities, and any other 
payment Obligation of the Company in respect of the Securities and the 
obligations of each Subsidiary Guarantor under its Subsidiary Guarantee are 
subordinated in right of payment, to the extent and in the manner provided in 
the Indenture, to the prior payment in full in cash of all Senior Debt of the 
Company and, in the case of a Subsidiary Guarantee, all Guarantor Senior Debt 
of such Subsidiary Guarantor (whether outstanding on the date hereof or 
hereafter created, incurred, assumed or guaranteed) and authorizes the 
Trustee to give effect and appoints the Trustee as attorney-in-fact for such 
purpose.

          14.  TRUSTEE DEALINGS WITH COMPANY.  The Indenture contains certain 
limitations on the rights of the Trustee, should it become a creditor of the 
Company, to obtain payment of claims in certain cases, or to realize on 
certain property received in respect of any such claim as security or 
otherwise.  The Trustee will be permitted to engage in other transactions; 
however, if it acquires any conflicting interest it must eliminate such 
conflict within 90 days, apply to the Commission for permission to continue 
or resign.

          15.  NO RECOURSE AGAINST OTHERS.  No director, officer, employee, 
incorporator or stockholder of the Company, as such, shall have any liability 
for any obligations of the Company under the Securities or the Indenture or 
for any claim based on, in

                                     A-11

<PAGE>

respect of, or by reason of, such obligations or their creation.  Each Holder 
of Securities, by accepting a Security, waives and releases all such 
liability.  The waiver and release are part of the consideration for issuance 
of the Securities.  Such waiver may not be effective to waive liabilities 
under the federal securities laws and it is the view of the Commission that 
such a waiver is against public policy.

          16.  AUTHENTICATION.  This Security shall not be valid until 
authenticated by the manual signature of the Trustee or an authenticating 
agent.

          17.  ABBREVIATIONS.  Customary abbreviations may be used in the 
name of a Holder or an assignee, such as:  TEN COM (= tenants in common), TEN 
ENT (= tenants by the entireties), JT TEN (= joint tenants with right of 
survivorship and not as tenants in common), CUST (= Custodian), and U/G/M/A 
(= Uniform Gifts to Minors Act).

          18.  CUSIP NUMBERS.  Pursuant to a recommendation promulgated by 
the Committee on Uniform Security Identification Procedures, the Company has 
caused CUSIP numbers to be printed on the Securities and the Trustee may use 
CUSIP numbers in notices of redemption as a convenience to Holders.  No 
representation is made as to the accuracy of such numbers either as printed 
on the Securities or as contained in any notice of redemption and reliance 
may be placed only on the other identification numbers placed thereon.

          The Company will furnish to any Holder upon written request and 
without charge a copy of the Indenture.  Requests may be made to:

     Continental Resources, Inc.
     302 North Independence, 3rd Floor
     P.O. Box 1032
     Enid, OK 73702
     Telecopier No.: (580) 548-5281
     Attention: Roger Clement


                                      A-12

<PAGE>

                                  ASSIGNMENT FORM

                  To assign this Security, fill in the form below:

                    I or we assign and transfer this Security to

                (Print or type assignee's name, address and zip code)

                    (Insert assignee's soc. sec. or tax I.D. No.)

          and irrevocably appoint                agent to transfer
          this Security on the books of the Company.  The agent may
          substitute another to act for him.

- -------------------------------------------------------------------------------

Date:  ______________________   Your Signature: ___________________________ 

Signature Guarantee:* ______________________________
                      (Signature must be guaranteed)

- -------------------------------------------------------------------------------
Sign exactly as your name appears on the other side of this Security.

In connection with any transfer or exchange of any of the Securities 
evidenced by this certificate occurring prior to the date that is two years 
after the later of the date of original issuance of such Securities and the 
last date, if any, on which such Securities were owned by the Company or any 
Affiliate of the Company, the undersigned confirms that such Securities are 
being:

CHECK ONE BOX BELOW:

    1/ /1      acquired for the undersigned's own account, without transfer (in
               satisfaction of Section 2.6(a)(ii)(A) or Section 2.6(d)(i)(A) of
               the Indenture); or

    2/ /2      transferred to the Company; or

    3/ /3      transferred pursuant to and in compliance with Rule 144A under
               the Securities Act of 1933; or

    4/ /4      transferred pursuant to an effective registration statement under
               the Securities Act; or

    5/ /5      transferred pursuant to and in compliance with Regulation S under
               the Securities Act of 1933, with transferee furnishing to the
               Trustee a signed letter containing certain representations and
- ------------------------
*/  Participant in a recognized Signature Guarantee Medallion Program (or 
    other signature guarantor acceptable to the Trustee).

                                     A-13

<PAGE>

               agreements (the form of which letter substantially appears in
               Section 2.14 of the Indenture); or

    6/ /6      transferred to an institutional "accredited investor" (as defined
               in Rule 501(a)(1), (2), (3) or (7) under the Securities Act of
               1933), that has furnished to the Trustee a signed letter
               containing certain representations and agreements (the form of
               which letter appears in Section 2.13 of the Indenture); or

    7/ /7      transferred pursuant to another available exemption from the
               registration requirements of the Securities Act of 1933.

Unless one of the boxes is checked, the Trustee will refuse to register any 
of the Securities evidenced by this certificate in the name of any person 
other than the registered holder thereof; PROVIDED, HOWEVER, that if box (5), 
(6) or (7) is checked, the Trustee or the Company may require, prior to 
registering any such transfer of the Securities, in their sole discretion, 
such legal opinions, certifications and other information as the Trustee or 
the Company may reasonably request to confirm that such transfer is being 
made pursuant to an exemption from, or in a transaction not subject to, the 
registration requirements of the Securities Act of 1933, such as the 
exemption provided by Rule 144 under such Act.


                                       ---------------------------------------
                                                    Signature
Signature Guarantee:(*)

- ---------------------------------      ---------------------------------------
(Signature must be guaranteed)                      Signature


- ------------------------------------------------------------------------------



- ----------------------
*/  Participant in a recognized Signature Guarantee Medallion Program (or
    other signature guarantor acceptable to the Trustee).

                                     A-14

<PAGE>


                      OPTION OF HOLDER TO ELECT PURCHASE

          If you want to elect to have this Security purchased by the Company 
pursuant to Section 4.10 or 4.13 of the Indenture, check the box below:


          / /8   Section 4.10          / /9   Section 4.13


          If you want to elect to have only part of the Security purchased by 
the Company pursuant to Section 4.10 or Section 4.13 of the Indenture, state 
the principal amount you elect to have purchased:  $______________


Date:           Your Signature:
     --------                  -------------------------------------------------
                (Sign exactly as your name appears on the face of this Security)


               Signature Guarantee:(*)
                                       -----------------------------------------




- --------------------
*/  Participant in a recognized Signature Guarantee Medallion Program (or
    other signature guarantor acceptable to the Trustee).

                                     A-15

<PAGE>

      SCHEDULE OF INCREASES OR DECREASES IN GLOBAL SECURITY


      The following increases or decreases in this Global Security have been 
made:

<TABLE>
<CAPTION>

              Amount of decrease in   Amount of increase in    Principal Amount of      Signature of
 Date of      Principal Amount of     Principal Amount of      this Global Security     authorized officer of
 Exchange     this Global Security    this Global Security     following such           Trustee or Note
                                                               decrease or increase     Custodian
 <S>          <C>                     <C>                      <C>                      <C>

</TABLE>


                                     A-16


<PAGE>

                            EXHIBIT B

               (Form of Face of Exchange Security)

                          SERIES B NOTE

                    [Global Securities Legend]
                                 
          UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED 
REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION 
("DTC"), NEW YORK, NEW YORK, TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF 
TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN 
THE NAME OF CEDE & CO. OR IN  SUCH OTHER NAME AS IS REQUESTED BY AN 
AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO., OR 
TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), 
ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY 
PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS 
AN INTEREST HEREIN.

          TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN 
WHOLE, BUT NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR SUCH 
SUCCESSOR'S NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL Security SHALL 
BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN 
THE INDENTURE REFERRED TO ON THE REVERSE HEREOF.

          THIS SECURITY IS SUBORDINATED TO SENIOR DEBT, AS DEFINED IN THE 
INDENTURE (AS DEFINED HEREIN), AND THE OBLIGATIONS OF EACH SUBSIDIARY 
GUARANTOR UNDER THE SUBSIDIARY GUARANTEE CONTAINED IN THE INDENTURE ARE 
SUBORDINATED TO GUARANTOR SENIOR INDEBTEDNESS, AS DEFINED IN THE INDENTURE, 
OF SUCH SUBSIDIARY GUARANTOR.

                                     B-1


<PAGE>


                         CONTINENTAL RESOURCES, INC.

                 10 1/4% Senior Subordinated Notes due 2008


No. 1                                                               $150,000,000
CUSIP Number: _____________


          Continental Resources, Inc., an Oklahoma corporation, promises to pay
to Cede & Co., or registered assigns, the principal sum of One Hundred Fifty
Million Dollars on August 1, 2008.

          Interest Payment Dates: February 1 and August 1. 
          
          Record Dates: January 15 and July 15. 

         Additional provisions of this Security are set forth on the other 
side of this Security.

         IN WITNESS WHEREOF, the Company has caused this Security to be 
signed manually or by facsimile by its duly authorized officers and a 
facsimile of its corporate seal to be affixed hereto and imprinted hereon.

Dated:  ________, 1998

                                       CONTINENTAL RESOURCES, INC.
                                       
                                       
                                       By
                                         -------------------------------------
                                         Name:
                                         Title:


                                       By
                                         -------------------------------------
                                         Name:
                                         Title:


TRUSTEE'S CERTIFICATE OF AUTHENTICATION

UNITED STATES TRUST COMPANY OF NEW YORK,
as Trustee, certifies that this is 
one of the Securities referred to in the 
within-mentioned Indenture:

By
  ----------------------------------
         Authorized Signatory

Dated:            , 1998
      ------------


                                     B-2

<PAGE>

                                (Back of Note)

                  10 1/4% Senior Subordinated Notes due 2008


          Capitalized terms used herein shall have the meanings assigned to 
them in the Indenture referred to below unless otherwise indicated.

          1.   INTEREST.  Continental Resources, Inc., an Oklahoma 
corporation (the "COMPANY"), promises to pay interest on the principal amount 
of this Security at the rate of 10 1/4% per annum, which interest shall be 
payable in cash semiannually in arrears on each February 1 and August 1, or 
if any such day is not a Business Day, on the next succeeding Business Day 
(each an "INTEREST PAYMENT DATE"); PROVIDED that the first Interest Payment 
Date shall be February 1, 1999.  Interest on the Securities will accrue from 
the most recent date to which interest has been paid or, if no interest has 
been paid, from the date of original issuance.  Interest will be computed on 
the basis of a 360-day year comprised of twelve 30-day months.

          2.   METHOD OF PAYMENT.  On each Interest Payment Date the Company 
will pay interest to the Person who is the Holder of record of this Security 
as of the close of business on the January 15 or July 15 immediately 
preceding such Interest Payment Date, even if this Security is cancelled 
after such record date and on or before such Interest Payment Date, except as 
provided in Section 2.12 of the Indenture with respect to defaulted interest. 
Principal, premium, if any, and interest on this Security will be payable at 
the office or agency of the Company maintained for such purpose within The 
City and State of New York or, in the event the Securities do not remain in 
book-entry form, at the option of the Company, payment of interest may be 
made by check mailed to the Holder of this Security at its address set forth 
in the register of Holders of Securities; PROVIDED that all payments with 
respect to the Global Securities and Definitive Securities having an 
aggregate principal amount of $5.0 million or more the Holders of which have 
given wire transfer instructions to the Company at least 10 Business Days 
prior to the applicable payment date will be required to be made by wire 
transfer of immediately available funds to the accounts specified by the 
Holders thereof.  Such payment shall be in such coin or currency of the 
United States of America as at the time of payment is legal tender for 
payment of public and private debts.

          3.   PAYING AGENT AND REGISTRAR.  Initially, United States Trust 
Company of New York, the Trustee under the Indenture, will act as Paying 
Agent and Registrar.  The Company may change any Paying Agent or Registrar 
without notice to any Holder.  The Company or any Subsidiary Guarantor or any 
other of the Company's Subsidiaries may act in any such capacity.

          4.   INDENTURE.  The Company issued the Securities under an 
Indenture dated as of July 24, 1998 ("INDENTURE") among the Company, the 
Subsidiary Guarantors and the Trustee.  The 

                                      B-3

<PAGE>

terms of the Securities include those stated in the Indenture and those made 
part of the Indenture by reference to the Trust Indenture Act of 1939, as 
amended (15 U.S. Code Sections 77aaa-77bbbb).  The Securities are subject to 
all such terms, and Holders are referred to the Indenture and such Act for a 
statement of such terms.  The Securities are general unsecured obligations of 
the Company equal in an aggregate principal amount to $150,000,000 and will 
mature on August 1, 2008.

          The Securities are general unsecured senior subordinated 
obligations of the Company limited to $150,000,000 million aggregate 
principal amount (subject to Section 2.7 of the Indenture).  The aggregate 
principal amount of notes which may be authenticated and delivered under the 
Indenture, including the Securities, is limited to $300.0 million (subject to 
Section 2.7 of the Indenture).  This Security is one of the Exchange 
Securities referred to in the Indenture.  The Securities include the Initial 
Securities and any Exchange Securities issued in exchange for the Initial 
Securities pursuant to the Indenture and the Registration Rights Agreement.  
The Initial Securities and the Exchange Securities are treated as a single 
class of securities under the Indenture.  The Indenture imposes certain 
limitations on the incurrence of Indebtedness by the Company and its 
Restricted Subsidiaries, the payment of dividends and other distributions on 
the Capital Stock of the Company and its Restricted Subsidiaries, the 
purchase or redemption of Capital Stock of the Company and Capital Stock of 
such Restricted Subsidiaries, certain purchases or redemptions of 
Subordinated Indebtedness, the sale or transfer of assets and Capital Stock 
of Restricted Subsidiaries, the issuance or sale of Capital Stock of 
Restricted Subsidiaries, the Investments of the Company and its Subsidiaries 
and transactions with Affiliates.  In addition, the Indenture limits the 
ability of the Company and its Restricted Subsidiaries to restrict 
distributions and dividends from Restricted Subsidiaries.

          To guarantee the due and punctual payment of the principal, 
premium, if any, and interest on the Securities and all other amounts payable 
by the Company under the Indenture and the Securities when and as the same 
shall be due and payable, whether at maturity, by acceleration or otherwise, 
according to the terms of the Securities and the Indenture, the Subsidiary 
Guarantors have unconditionally guaranteed (and future Subsidiary Guarantors, 
together with the Subsidiary Guarantors, will unconditionally guarantee), 
jointly and severally, such obligations on a senior subordinated basis 
pursuant to the terms of the Indenture.

                                     B-4

<PAGE>

          5.   OPTIONAL REDEMPTION.

          (a)  The Securities are not redeemable at the Company's option 
prior to August 1, 2003.  From and after August 1, 2003, the Securities will 
be subject to redemption at the option of the Company, in whole or in part, 
upon not less than 30 nor more than 60 days' notice, at the redemption prices 
(expressed as percentages of principal amount) set forth below PLUS accrued 
and unpaid interest thereon to the applicable redemption date, if redeemed 
during the twelve-month period beginning on August 1 of the years indicated 
below:

<TABLE>
<CAPTION>
                                                     PERCENTAGE OF
         YEAR                                       PRINCIPAL AMOUNT
         ----                                       ----------------
         <S>                                        <C>
         2003..........................................105.125%
         2004..........................................103.417%
         2005..........................................101.708%
         2006 and thereafter...........................100.000%
</TABLE>

          (b)  Notwithstanding the provisions of clause (a) of this Paragraph 
5, prior to August 1, 2001 the Company may, at its option, on any one or more 
occasions, redeem up to 35% of the original aggregate principal amount of 
Securities at a redemption price equal to 110.250% of the principal amount 
thereof, plus accrued and unpaid interest, if any, thereon to the redemption 
date, with the net proceeds of sales of public common stock of the Company; 
PROVIDED that at least 65% of the original aggregate principal amount of 
Securities must remain outstanding immediately after the occurrence of such 
redemption; and PROVIDED, further, that any such redemption shall occur 
within 60 days after the date of the closing of the related sale of such 
common stock.  

          (c)  Notwithstanding the provisions of clause (a) of this Paragraph 
5, upon the occurrence of a Change of Control at any time on or prior to 
August 1, 2003, the Company may, at its option, redeem in whole but not in 
part, the Securities at a redemption price equal to 100% of the principal 
amount thereof, plus the Applicable Premium as of, and accrued but unpaid 
interest, if any, to, the date of redemption (subject to the right of Holders 
of record on the relevant record date to receive interest due on the relevant 
interest payment date) provided that such redemption shall be made no more 
than 90 days after the occurrence of a Change of Control.  The Company shall 
notify the Trustee and, by mail, the Holders of the Securities of its 
decision to redeem the Securities pursuant to this Paragraph 5(c) within 30 
days of the occurrence of a Change of Control.

          6.   MANDATORY REDEMPTION.

          Except as set forth in paragraph 7 below, the Company shall not be 
required to make mandatory redemption or sinking fund payments with respect 
to the Securities.

                                     B-5

<PAGE>

          7.   REPURCHASE AT OPTION OF HOLDER.

          (a)  Upon the occurrence of a Change of Control, if the Company 
does not redeem the Securities pursuant to paragraph 5(c), each Holder of 
Securities shall have the right to require the Company to repurchase all or 
any part (equal to $1,000 or an integral multiple thereof) of such Holder's 
Securities pursuant to the offer described below (the "Change of Control 
Offer") at an offer price in cash equal to 101% of the aggregate principal 
amount thereof plus accrued and unpaid interest, if any, thereon to the date 
of purchase (the "Change of Control Payment").  The right of the Holders of 
the Securities to require the Company to repurchase such Securities upon a 
Change of Control may not be waived by the Trustee without the approval of 
the Holders of the Securities required by Section 9.2 of the Indenture.  
Within 30 days following any Change of Control, the Company will mail a 
notice to each Holder describing the transaction or transactions that 
constitute the Change of Control and offering to repurchase Securities 
pursuant to the procedures required by the Indenture and described in such 
notice.  The Change of Control Payment shall be made on a business day not 
less than 30 days nor more than 60 days after such notice is mailed.  The 
Company and each Subsidiary Guarantor will comply with the requirements of 
Rule 14e-1 under the Exchange Act and any other securities laws and 
regulations thereunder to the extent such laws and regulations are applicable 
in connection with the repurchase of the Securities as a result of a Change 
of Control.

          (b)  If the Company or a Restricted Subsidiary consummates any 
Asset Sales permitted by the Indenture, when the aggregate amount of Excess 
Proceeds exceeds $15 million, the Company shall make an Asset Sale Offer to 
purchase the maximum principal amount of Securities and any other Pari Passu 
Indebtedness to which the Asset Sale Offer applies that may be purchased out 
of the Excess Proceeds, at an offer price in cash in an amount equal to, in 
the case of the Securities, 100% of the principal amount thereof, plus 
accrued and unpaid interest thereon to the date of purchase or, in the case 
of any Pari Passu Indebtedness, 100% of the principal amount thereof (or with 
respect to discount Pari Passu Indebtedness, the accreted value thereof) on 
the date of purchase, in each case, in accordance with the procedures set 
forth in Section 3.9 of the Indenture or the agreements governing the Pari 
Passu Indebtedness, as applicable.  To the extent that the aggregate 
principal amount (or accreted value, as the case may be) of Securities, and 
Pari Passu Indebtedness tendered pursuant to an Asset Sale Offer is less than 
the Excess Proceeds, the Company may use any remaining Excess Proceeds for 
general corporate purposes.  If the sum of (i) the aggregate principal amount 
of Securities surrendered by Holders thereof and (ii) the aggregate principal 
amount or accreted value, as the case may be, of Pari Passu Indebtedness 
surrendered by holders or lenders thereof exceeds the amount of Excess 
Proceeds, the Trustee and the trustee or other lender representative for the 
Pari Passu Indebtedness shall select the Securities and the other Pari Passu 
Indebtedness to be purchased on a pro rata basis, based on the aggregate 
principal amount (or accreted value, as applicable) thereof surrendered in 
such Asset

                                     B-6

<PAGE>

Sale Offer.  Upon completion of such Asset Sale Offer, the amount of Excess 
Proceeds shall be reset at zero.

          8.   NOTICE OF REDEMPTION.  Notice of redemption will be mailed at 
least 30 days but not more than 60 days before the redemption date to each 
Holder whose Securities are to be redeemed at its registered address. 
Securities in denominations larger than $1,000 may be redeemed in part but 
only in integral multiples of $1,000, unless all of the Securities held by a 
Holder are to be redeemed.  On and after the redemption date interest ceases 
to accrue on the aggregate principal amount of the Securities called for 
redemption.

          9.   DENOMINATIONS, TRANSFER, EXCHANGE.  The Securities may be 
issued initially in the form of one or more fully registered Global 
Securities.  The Securities may also be issued in registered form without 
coupons in minimum denominations of $1,000 and integral multiples of $1,000.  
The transfer of Securities may be registered and Securities may be exchanged 
as provided in the Indenture.  The Registrar and the Trustee may require a 
Holder, among other things, to furnish appropriate endorsements and transfer 
documents and the Company may require a Holder to pay any taxes and fees 
required by law or permitted by the Indenture.  The Company need not exchange 
or register the transfer of any Security or portion of a Security selected 
for redemption, except for the unredeemed portion of any Security being 
redeemed in part.  Also, it need not exchange or register the transfer of any 
Security for a period of 15 days before a selection of Securities to be 
redeemed or during the period between a record date and the corresponding 
Interest Payment Date.

          10.  PERSONS DEEMED OWNERS.  The registered Holder of a Security 
may be treated as its owner for all purposes.

          11.  AMENDMENT, SUPPLEMENT AND WAIVER.  Subject to certain 
exceptions, the Indenture or the Securities may be amended or supplemented 
with the consent of the Holders of at least a majority in aggregate principal 
amount of the Securities then outstanding (including, without limitation, 
consents obtained in connection with a purchase of, or the tender offer or 
exchange offer for, such Securities), and any existing Default or Event of 
Default under, or compliance with any provision of the Indenture or the 
Securities may be waived with the consent of the Holders of a majority in 
principal amount of the then outstanding Securities.  Without the consent of 
any Holder of a Security, the Indenture or the Securities may be amended or 
supplemented to cure any ambiguity, defect or inconsistency, to provide for 
uncertificated Securities in addition to or in place of certificated 
Securities, to provide for the assumption of the Company's obligations to 
Holders of the Securities in case of a merger or consolidation, to make any 
change that would provide any additional rights or benefits to the Holders of 
the Securities or that does not adversely affect the legal rights under the 
Indenture of any such Holder, to add guarantees with respect to the 
Securities or to secure the Securities or to comply with the requirements of 
the Commission in order to effect

                                    B-7

<PAGE>

or maintain the qualification of the Indenture under the Trust Indenture Act.

          12.  DEFAULTS AND REMEDIES.  Events of Default include:  (i) 
default for 30 consecutive days in the payment when due of interest on the 
Securities (whether or not prohibited by the provisions of Article 10 of the 
Indenture); (ii) default in payment when due of the principal of or premium, 
if any, on the Securities (whether or not prohibited by the provisions of 
Article 10 of the Indenture); (iii) failure by the Company or any Subsidiary 
Guarantor to comply with the provisions of Article 5 of the Indenture; (iv) 
failure by the Company for 30 consecutive days after notice from the Trustee 
or the Holders of at least 25% in aggregate principal amount of the 
Securities then outstanding to comply with the provisions of Sections 4.3, 
4.7, 4.8, 4.9, 4.10, 4.11, 4.12, 4.13, 4.14, 4.16, 4.17, 4.18 and 4.19 of the 
Indenture; (v) failure by the Company for 60 consecutive days after notice 
from the Trustee or the Holders of at least 25% in aggregate principal amount 
of the Securities then outstanding to comply with any of its other agreements 
or covenants in, or provisions of, this Security or in the Indenture; (vi) 
except as permitted by the Indenture, any Subsidiary Guarantee shall be held 
in any judicial proceeding to be unenforceable or invalid or shall cease for 
any reason to be in full force and effect or a Subsidiary Guarantor or any 
Person acting on behalf of a Subsidiary Guarantor, shall deny or disaffirm 
such Subsidiary Guarantor's obligations under its Subsidiary Guarantee; (vii) 
default under any mortgage, indenture or instrument under which there may be 
issued or by which there may be secured or evidenced any Indebtedness for 
money borrowed by the Company or any Restricted Subsidiary whether such 
Indebtedness or guarantee now exists, or is created after the date of the 
Indenture, which default (a) is caused by a failure to pay principal of such 
Indebtedness prior to the expiration of the grace period provided in such 
Indebtedness on the date of such default (a "Payment Default") or (b) results 
in the acceleration of such Indebtedness prior to its express maturity and, in 
each case, the principal amount of any such Indebtedness, together with the 
principal amount of any other such Indebtedness under which there is then 
existing a Payment Default or the maturity of which has been so accelerated, 
aggregates $10 million or more; (viii) a final non-appealable judgment or 
order or final non-appealable judgments or orders are rendered against the 
Company or any Restricted Subsidiary that remain unpaid or discharged for a 
period of 60 days and that require the payment in money, either individually 
or in an aggregate amount, that is more than $10 million; and (ix) certain 
events of bankruptcy or insolvency with respect to the Company or any 
Restricted Subsidiary.  If any Event of Default (other than an Event of 
Default described in clause (ix) above) occurs and is continuing, the Trustee 
or the Holders of at least 25% in principal amount of the then outstanding 
Securities may declare all the Securities to be due and payable immediately.  
Notwithstanding the foregoing, in the case of an Event of Default arising 
from certain events of bankruptcy or insolvency with respect to the Company 
or any Restricted Subsidiary, all outstanding Securities will become due and 
payable without further action or notice.  Holders of the Securities may not 

                                     B-8

<PAGE>

enforce the Indenture or the Securities except as provided in the Indenture.  
Subject to certain limitations, Holders of a majority in aggregate principal 
amount of the then outstanding Securities may direct the Trustee in its 
exercise of any trust or power.  The Trustee may withhold from Holders of the 
Securities notice of any continuing Default or Event of Default (except a 
Default or Event of Default relating to the payment of principal or interest) 
if it determines that withholding notice is in their interest.  The Holders 
of a majority in aggregate principal amount of the Securities then 
outstanding by notice to the Trustee may on behalf of the Holders of all of 
the Securities waive any existing Default or Event of Default and its 
consequences under the Indenture except a continuing Default or Event of 
Default in the payment of interest or premium on, or the principal of, the 
Securities.  The Company is required to deliver to the Trustee annually a 
statement regarding compliance with the Indenture, and the Company is 
required, within 5 Business days after becoming aware of any Default or Event 
of Default, to deliver to the Trustee a statement specifying such Default or 
Event of Default.

          13.  SUBORDINATION.  The Securities are subordinated to Senior Debt 
of the Company and the Subsidiary Guarantees are subordinated to Guarantor 
Senior Debt of the Subsidiary Guarantors.  To the extent provided in the 
Indenture, Senior Debt must be paid before the Securities may be paid and 
Guarantor Senior Debt of a Subsidiary Guarantor must be paid before a 
Subsidiary Guarantor may pay under its Subsidiary Guarantee.  The Company 
agrees, and each Holder by accepting a Security agrees, that the Indebtedness 
evidenced by the Securities, including, but not limited to, the payment of 
principal of, premium, if any, and interest on the Securities, and any other 
payment Obligation of the Company in respect of the Securities and the 
obligations of each Subsidiary Guarantor under its Subsidiary Guarantee are 
subordinated in right of payment, to the extent and in the manner provided in 
the Indenture, to the prior payment in full in cash of all Senior Debt of the 
Company and, in the case of a Subsidiary Guarantor, all Guarantor Senior Debt 
of such Subsidiary Guarantor (whether outstanding on the date hereof or 
hereafter created, incurred, assumed or guaranteed) and authorizes the 
Trustee to give effect and appoints the Trustee as attorney-in-fact for such 
purpose.

          14.  TRUSTEE DEALINGS WITH COMPANY.  The Indenture contains certain 
limitations on the rights of the Trustee, should it become a creditor of the 
Company, to obtain payment of claims in certain cases, or to realize on 
certain property received in respect of any such claim as security or 
otherwise.  The Trustee will be permitted to engage in other transactions; 
however, if it acquires any conflicting interest it must eliminate such 
conflict within 90 days, apply to the Commission for permission to continue 
or resign.

          15.  NO RECOURSE AGAINST OTHERS.  No director, officer, employee, 
incorporator or stockholder of the Company, as such, shall have any liability 
for any obligations of the Company under the Securities or the Indenture or 
for any claim based on, in

                                     B-9

<PAGE>

respect of, or by reason of, such obligations or their creation.  Each Holder 
of Securities, by accepting a Security, waives and releases all such 
liability.  The waiver and release are part of the consideration for issuance 
of the Securities.  Such waiver may not be effective to waive liabilities 
under the federal securities laws and it is the view of the Commission that 
such a waiver is against public policy.

          16.  AUTHENTICATION.  This Security shall not be valid until 
authenticated by the manual signature of the Trustee or an authenticating 
agent.

          17.  ABBREVIATIONS.  Customary abbreviations may be used in the 
name of a Holder or an assignee, such as:  TEN COM (= tenants in common), TEN 
ENT (= tenants by the entireties), JT TEN (= joint tenants with right of 
survivorship and not as tenants in common), CUST (= Custodian), and U/G/M/A 
(= Uniform Gifts to Minors Act).

          18.  CUSIP NUMBERS.  Pursuant to a recommendation promulgated by 
the Committee on Uniform Security Identification Procedures, the Company has 
caused CUSIP numbers to be printed on the Securities and the Trustee may use 
CUSIP numbers in notices of redemption as a convenience to Holders.  No 
representation is made as to the accuracy of such numbers either as printed 
on the Securities or as contained in any notice of redemption and reliance 
may be placed only on the other identification numbers placed thereon.

          The Company will furnish to any Holder upon written request and 
without charge a copy of the Indenture.  Requests may be made to:

               Continental Resources, Inc.
               302 North Independence, 3rd Floor
               P.O. Box 1032
               Enid, OK  73702
               Telecopier No.:  (580) 548-5281
               Attention:  Roger Clement


                                     B-10

<PAGE>

                         ASSIGNMENT FORM

        To assign this Security, fill in the form below:

          I or we assign and transfer this Security to

      (Print or type assignee's name, address and zip code)

          (Insert assignee's soc. sec. or tax I.D. No.)

   and irrevocably appoint                agent to transfer
   this Security on the books of the Company.  The agent may
   substitute another to act for him.

- ------------------------------------------------------------------------------

Date:                           Your Signature:
     -----------------------                   -----------------------------

Signature Guarantee:(*)
                        ----------------------------------------
                            (Signature must be guaranteed)

- ------------------------------------------------------------------------------
Sign exactly as your name appears on the other side of this Security.

In connection with any transfer or exchange of any of the Securities 
evidenced by this certificate occurring prior to the date that is two years 
after the later of the date of original issuance of such Securities and the 
last date, if any, on which such Securities were owned by the Company or any 
Affiliate of the Company, the undersigned confirms that such Securities are 
being:

CHECK ONE BOX BELOW:

    1/ /10     acquired for the undersigned's own account, without transfer (in
               satisfaction of Section 2.6(a)(ii)(A) or Section 2.6(d)(i)(A) of
               the Indenture); or

    2/ /11     transferred to the Company; or

    3/ /12     transferred pursuant to and in compliance with Rule 144A under
               the Securities Act of 1933; or

    4/ /13     transferred pursuant to an effective registration statement under
               the Securities Act; or

    5/ /14     transferred pursuant to and in compliance with Regulation S under
               the Securities Act of 1933, with transferee furnishing to the
               Trustee a signed

- --------------------

(*)/ Participant in a recognized Signature Guarantee Medallion Program (or 
     other signature guarantor acceptable to the Trustee).

                                     B-11

<PAGE>

               letter containing certain representations and agreements (the
               form of which letter substantially appears in Section 2.14 of the
               Indenture); or

    6/ /15     transferred to an institutional "accredited investor" (as defined
               in Rule 501(a)(1), (2), (3) or (7) under the Securities Act of
               1933), that has furnished to the Trustee a signed letter
               containing certain representations and agreements (the form of
               which letter appears in Section 2.13 of the Indenture); or

    7/ /16     transferred pursuant to another available exemption from the
               registration requirements of the Securities Act of 1933.

Unless one of the boxes is checked, the Trustee will refuse to register any 
of the Securities evidenced by this certificate in the name of any Person 
other than the registered holder thereof; PROVIDED, HOWEVER, that if box (5), 
(6) or (7) is checked, the Trustee or the Company may require, prior to 
registering any such transfer of the Securities, in their sole discretion, 
such legal opinions, certifications and other information as the Trustee or 
the Company may reasonably request to confirm that such transfer is being 
made pursuant to an exemption from, or in a transaction not subject to, the 
registration requirements of the Securities Act of 1933, such as the 
exemption provided by Rule 144 under such Act.


                                       ---------------------------------------
                                                    Signature
Signature Guarantee:(*)

- --------------------------------       ---------------------------------------
(Signature must be guaranteed)                      Signature

- ------------------------------------------------------------------------------




- ---------------
(*)/ Participant in a recognized Signature Guarantee Medallion Program (or other
     signature guarantor acceptable to the Trustee).

                                     B-12

<PAGE>

            SCHEDULE OF INCREASES OR DECREASES IN GLOBAL SECURITY



               The following increases or decreases in this Global Security 
have been made:

<TABLE>
<CAPTION>

               Amount of decrease in     Amount of increase in     Principal Amount of      Signature of          
Date of        Principal Amount of       Principal Amount of       this Global Security     authorized officer of 
Exchange       this Global Security      this Global Security      following such           Trustee or Note 
                                                                   decrease or increase     Custodian       
<S>            <C>                       <C>                       <C>                      <C>

</TABLE>

                                      B-13

<PAGE>

                OPTION OF HOLDER TO ELECT PURCHASE

                                                                      
          If you want to elect to have this Security purchased by the Company 
pursuant to Section 4.10 or 4.13 of the Indenture, check the box below:


        / /17 Section 4.10          / /18 Section 4.13


        If you want to elect to have only part of the Security purchased by 
the Company pursuant to Section 4.10 or Section 4.13 of the Indenture, state 
the principal amount you elect to have purchased:  $______________


Date:                                Your Signature:                            
     --------------------                            ---------------------------
                                                     (Sign exactly as your name 
                                                     appears on the face of this
                                                     Security)


                                     Signature Guarantee:(*)
                                                             -------------------




________________
*  Participant in a recognized Signature Guarantee Medallion Program (or other
   signature guarantor acceptable to the Trustee).


                                     B-14
<PAGE>
                                                                     EXHIBIT C

                   FORM OF SUBSIDIARY GUARANTEE

          This Supplemental Indenture, dated as of [__________] (this 
"Supplemental Indenture" or "Guarantee"), among [name of future Subsidiary
Guarantor] (the "Guarantor"), Continental Resources, Inc. (together with its
successors and assigns, the "Company"), each other then existing Subsidiary
Guarantor under the Indenture referred to below, and United States Trust
Company of New York as Trustee under the Indenture referred to below.

                       W I T N E S S E T H:

          WHEREAS, the Company and the Trustee have heretofore executed and 
delivered an Indenture, dated as of July 24, 1998 (as amended, supplemented, 
waived or otherwise modified, the "INDENTURE"), providing for the issuance of 
an aggregate principal amount of $150.0 million of 10 1/4% Senior Subordinated 
Notes due 2008 of the Company (the "Securities";

          WHEREAS, Section 4.14 of the Indenture provides that the Company is 
required to cause each Restricted Subsidiary acquired or created by the 
Company or any Restricted Subsidiary to execute and deliver to the Trustee a 
Subsidiary Guarantee pursuant to which such Subsidiary Guarantor will 
unconditionally guarantee, jointly and severally with the other Subsidiary 
Guarantors, the full and prompt payment of the Securities pursuant to Article 
11 of the Indenture subject to the subordination provisions of Article 10 of 
the Indenture; and

          WHEREAS, pursuant to Section 9.1 of the Indenture, the Trustee and 
the Company are authorized to execute and deliver this Supplemental Indenture 
to amend the Indenture, without the consent of any Securityholder;

          NOW, THEREFORE, in consideration of the foregoing and for other 
good and valuable consideration, the receipt of which is hereby acknowledged, 
the Guarantor, the Company, the other Subsidiary Guarantors and the Trustee 
mutually covenant and agree for the equal and ratable benefit of the holders 
of the Securities as follows:


                                   ARTICLE I

                                  DEFINITIONS

          SECTION 1.1  DEFINED TERMS.  As used in this Subsidiary Guarantee, 
terms defined in the Indenture or in the preamble or recital hereto are used 
herein as therein defined, except that the term "Holders" in this Guarantee 
shall refer to the term "Holders" as defined in the Indenture and the Trustee 
acting on behalf or for the benefit of such holders.  The words "herein," 
"hereof" and "hereby" and other words of similar import used in this 
Supplemental Indenture refer to this Supplemental Indenture 



                                      C-1
<PAGE>

as a whole and not to any particular section hereof.

                                    ARTICLE 2

                         AGREEMENT TO BE BOUND; GUARANTEE

          SECTION 2.1  AGREEMENT TO BE BOUND.  The Guarantor hereby becomes a 
party to the Indenture as a Subsidiary Guarantor and as such will have all of 
the rights and be subject to all of the obligations and agreements of a 
Subsidiary Guarantor under the Indenture.  The Guarantor agrees to be bound 
by all of the provisions of the Indenture applicable to a Subsidiary 
Guarantor and to perform all of the obligations and agreements of a 
Subsidiary Guarantor under the Indenture.  

          SECTION 2.2  GUARANTEE.  (a) The Guarantor hereby  jointly and 
severally, unconditionally guarantees to each Holder of a Security 
authenticated and delivered by the Trustee and to the Trustee and its 
successors and assigns, irrespective of the validity and enforceability of 
the Indenture, the Securities or the obligations of the Company thereunder, 
that:  (a) the principal of and premium and interest, on the Securities shall 
be promptly paid in full when due, whether at maturity, by acceleration, 
redemption or otherwise, and interest on the overdue principal of and 
interest on premium and interest, on the Securities, if any, if lawful, and 
all other obligations of the Company to the Holders or the Trustee thereunder 
shall be promptly paid in full or performed, all in accordance with the terms 
thereof; and (b) in case of any extension of time of payment or renewal of 
any Securities or any of such other obligations, that the same shall be 
promptly paid in full when due or performed in accordance with the terms of 
the extension or renewal, whether at stated maturity, by acceleration or 
otherwise in accordance with the provisions of Article 11 of the Indenture.   

          (b)  The Guarantor agrees that the Indebtedness evidenced by its 
Subsidiary Guarantee shall be subordinated in right of payment, to the extent 
and in the manner provided in Article 10 of the Indenture, to the prior 
payment when due in cash or Cash Equivalents of all Guarantor Senior Debt of 
the Guarantor and that the subordination is for the benefit of and 
enforceable by the holders of Guarantor Senior Debt of the Guarantor.
                                                                      
                                   ARTICLE 3

                                 MISCELLANEOUS

          SECTION 3.1  NOTICES.  All notices and other communications to the 
Guarantor shall be given as provided in the Indenture to the Guarantor, at 
its address set forth below, with a copy to the Company as provided in the 
Indenture for notices to the Company. 

          SECTION 3.2  PARTIES.  Nothing expressed or mentioned herein is 
intended or shall be construed to give any Person, firm or corporation, other 
than the Holders and the Trustee and the 


                                      C-2
<PAGE>

holders of any Guarantor Senior Indebtedness, any legal or equitable right, 
remedy or claim under or in respect of this Supplemental Indenture or the 
Indenture or any provision herein or therein contained.

          SECTION 3.3  GOVERNING LAW.  This Supplemental Indenture shall be 
governed by the laws of the State of New York.

          SECTION 3.4  SEVERABILITY CLAUSE.  In case any provision in this 
Supplemental Indenture shall be invalid, illegal or unenforceable, the 
validity, legality and enforceability of the remaining provisions shall not 
in any way be affected or impaired thereby and such provision shall be 
ineffective only to the extent of such invalidity, illegality or 
unenforceability.

          SECTION 3.5  RATIFICATION OF INDENTURE; SUPPLEMENTAL INDENTURES 
PART OF INDENTURE.  Except as expressly amended hereby, the Indenture is in 
all respects ratified and confirmed and all the terms, conditions and 
provisions thereof shall remain in full force and effect.  This Supplemental 
Indenture shall form a part of the Indenture for all purposes, and every 
holder of Securities heretofore or hereafter authenticated and delivered 
shall be bound hereby.  The Trustee makes no representation or warranty as to 
the validity or sufficiency of this Supplemental Indenture.

          SECTION 3.6  COUNTERPARTS.  The parties hereto may sign one or more 
copies of this Supplemental Indenture in counterparts, all of which together 
shall constitute one and the same agreement.

          SECTION 3.7  HEADINGS.  The headings of the Articles and the 
sections in this Guarantee are for convenience of reference only and shall 
not be deemed to alter or affect the meaning or interpretation of any 
provisions hereof.

          IN WITNESS WHEREOF, the parties hereto have caused this 
Supplemental Indenture to be duly executed as of the date first above written.


                                       [NAME OF GUARANTOR],
                                       as a Subsidiary Guarantor
                                       
                                       
                                       By: 
                                           ------------------------------------
                                           Name: 
                                           Title:


                                      C-3
<PAGE>
                                       CONTINENTAL RESOURCES, INC.
                                       
                                       
                                       By:
                                           ------------------------------------
                                           Name: 
                                           Title:


                                       CONTINENTAL GAS
                                       as a Subsidiary Guarantor

                                       By:
                                           ------------------------------------
                                           Name: 
                                           Title:


                                       CONTINENTAL CRUDE CO.
                                       as a Subsidiary Guarantor


                                       By:
                                           ------------------------------------
                                           Name: 
                                           Title:



                                            [Add signature block for any other
                                            existing Subsidiary Guarantors]



UNITED STATES TRUST COMPANY OF NEW YORK


By:
    ------------------------------------
    Name: 
    Title:


                                      C-4

<PAGE>

                                                                 EXECUTION COPY

- --------------------------------------------------------------------------------

                          CONTINENTAL RESOURCES, INC.
                                       
                                   As Issuer
                                       
                            CONTINENTAL GAS, INC.
                            CONTINENTAL CRUDE CO.
                                       
                                       
                           As Subsidiary Guarantors
                                       
                                       
                       10 1/4% SENIOR SUBORDINATED NOTES DUE 2008
                                       
                                       
                              -------------------
                                       
                                  INDENTURE
                                       
                          Dated as of July 24, 1998
                                       
                              -------------------
                                       
                                       
                                       
                   UNITED STATES TRUST COMPANY OF NEW YORK
                                               
                                  As Trustee
                                       
                                       
                                       
                              -------------------
       

- --------------------------------------------------------------------------------


                                      C-5
<PAGE>

                             CROSS-REFERENCE TABLE*

<TABLE>
<CAPTION>
Trust Indenture                                                        Indenture
 Act Section                                                             Section
- ---------------                                                        ---------
<S>                                                                    <C>
310  (a)(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    7.10
     (a)(2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    7.10
     (a)(3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    N.A.
     (a)(4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    N.A.
     (a)(5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    7.10
     (b). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    7.10
     (c). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    N.A.
311  (a). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    7.11
     (b). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    7.11
     (c). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    N.A.
312  (a). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     2.5
     (b). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    12.3
     (c). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    12.3
313  (a). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     7.6
     (b)(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    N.A.
     (b)(2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     7.7
     (c). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  7.6; 12.2
     (d). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     7.6
314  (a). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4.3; 12.2
     (b). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     N.A.
     (c)(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    12.4
     (c)(2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    12.4
     (c)(3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     N.A.
     (d). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  10.3-10.5
     (e). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    12.5
     (f). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     N.A.
315  (a). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     7.1
     (b). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  7.5; 12.2
     (c). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     7.1
     (d). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     7.1
     (e). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     6.11
316  (a)(last sentence) . . . . . . . . . . . . . . . . . . . . . . . .     2.9
     (a)(1)(A). . . . . . . . . . . . . . . . . . . . . . . . . . . . .     6.5
     (a)(1)(B). . . . . . . . . . . . . . . . . . . . . . . . . . . . .     6.4
     (a)(2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     N.A.
     (b). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     6.7
     (c). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     2.12
317  (a)(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     6.8
     (a)(2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     6.9
     (b). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     2.4
318  (a). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    12.1
     (b). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     N.A.
     (c). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    12.1
</TABLE>

_____________
N.A. means not applicable.

*  This Cross-Reference Table is not part of the Indenture.


<PAGE>

                        TABLE OF CONTENTS
<TABLE>
<CAPTION>
                                                                            Page
                                                                            ----
<S>            <C>                                                          <C>
                            ARTICLE 1
                  DEFINITIONS AND INCORPORATION
                           BY REFERENCE. . . . . . . . . . . . . . . .        1
Section 1.1.   Definitions . . . . . . . . . . . . . . . . . . . . . .        1
Section 1.2.   Other Definitions . . . . . . . . . . . . . . . . . . .       23
Section 1.3.   Incorporation By Reference of Trust Indenture Act . . .       24
Section 1.4.   Rules of Construction . . . . . . . . . . . . . . . . .       25

                            ARTICLE 2
                         THE SECURITIES. . . . . . . . . . . . . . . .       26
Section 2.1.   Form, Dating and Terms. . . . . . . . . . . . . . . . .       26
Section 2.2.   Execution and Authentication. . . . . . . . . . . . . .       32
Section 2.3.   Registrar and Paying Agent. . . . . . . . . . . . . . .       33
Section 2.4.   Paying Agent to Hold Money in Trust . . . . . . . . . .       34
Section 2.5.   Holder Lists. . . . . . . . . . . . . . . . . . . . . .       34
Section 2.6.   Transfer and Exchange . . . . . . . . . . . . . . . . .       35
Section 2.7.   Replacement Securities. . . . . . . . . . . . . . . . .       38
Section 2.8.   Outstanding Securities. . . . . . . . . . . . . . . . .       39
Section 2.9.   Temporary Securities. . . . . . . . . . . . . . . . . .       39
Section 2.10.  CUSIP Number. . . . . . . . . . . . . . . . . . . . . .       39
Section 2.11.  Cancellation. . . . . . . . . . . . . . . . . . . . . .       40
Section 2.12.  Defaulted Interest. . . . . . . . . . . . . . . . . . .       40
SECTION 2.13.  Form of Certificate to be Delivered in Connection 
               with Transfers to Institutional Accredited Investors. .       41
SECTION 2.14.  Form of Certificate to be Delivered in Connection 
               with Transfers Pursuant to Regulations. . . . . . . . .       42
SECTION 2.15.  Computation of Interest . . . . . . . . . . . . . . . .       43

                            ARTICLE 3
                   REDEMPTION AND PREPAYMENT . . . . . . . . . . . . . .     44
Section 3.1.   Notices to Trustee. . . . . . . . . . . . . . . . . . . .     44
Section 3.2.   Selection of Securities to Be Redeemed. . . . . . . . . .     44
Section 3.3.   Notice of Redemption. . . . . . . . . . . . . . . . . . .     45
Section 3.4.   Effect of Notice of Redemption. . . . . . . . . . . . . .     46
Section 3.5.   Deposit of Redemption Price . . . . . . . . . . . . . . .     46
Section 3.6.   Securities Redeemed in Part . . . . . . . . . . . . . . .     46
Section 3.7.   Optional Redemption . . . . . . . . . . . . . . . . . . .     46
Section 3.8.   Mandatory Redemption. . . . . . . . . . . . . . . . . . .     48
Section 3.9.   Offer to Purchase By Application of Excess Proceeds . . .     48

                            ARTICLE 4
                            COVENANTS . . . . . . . . . . . . . . . . . .     50
Section 4.1.   Payment of Securities. . . . . . . . . . . . . . . . . . .     50
Section 4.2.   Maintenance of Office or Agency. . . . . . . . . . . . . .     51
Section 4.3.   Commission Reports . . . . . . . . . . . . . . . . . . . .     51
Section 4.4.   Compliance Certificate . . . . . . . . . . . . . . . . . .     52
Section 4.5.   Taxes. . . . . . . . . . . . . . . . . . . . . . . . . . .     52
Section 4.6.   Stay, Extension and Usury Laws . . . . . . . . . . . . . .     53
Section 4.7.   Restricted Payments. . . . . . . . . . . . . . . . . . . .     53
Section 4.8.   Dividend and Other Payment Restrictions Affecting


                                      -i-
<PAGE>

                                                                            Page
                                                                            ----
               Restricted Subsidiaries. . . . . . . . . . . . . . . . . .     56
Section 4.9.   Incurrence of Indebtedness and Issuance of 
               Disqualified Stock . . . . . . . . . . . . . . . . . . . .     57
Section 4.10.  Asset Sales. . . . . . . . . . . . . . . . . . . . . . . .     59
Section 4.11.  Transactions with Affiliates . . . . . . . . . . . . . . .     61
Section 4.12.  Liens. . . . . . . . . . . . . . . . . . . . . . . . . . .     62
Section 4.13.  Offer to Repurchase Upon Change of Control . . . . . . . .     62
Section 4.14.  Additional Subsidiary Guarantees . . . . . . . . . . . . .     64
Section 4.15.  Corporate Existence. . . . . . . . . . . . . . . . . . . .     64
Section 4.16.  No Layering. . . . . . . . . . . . . . . . . . . . . . . .     64
Section 4.17.  Business Activities. . . . . . . . . . . . . . . . . . . .     65
Section 4.18.  Sale and Leaseback Transactions  . . . . . . . . . . . . .     65
Section 4.19.  Designation of Unrestricted Subsidiaries . . . . . . . . .     65

                            ARTICLE 5
                            SUCCESSORS. . . . . . . . . . . . . . . . . .     66
Section 5.1.   Merger, Consolidation, or Sale of Substantially All 
               Assets . . . . . . . . . . . . . . . . . . . . . . . . . .     66
Section 5.2.   Successor Corporation Substituted; Subsidiary 
               Guarantors Confirmed . . . . . . . . . . . . . . . . . . .     67

                            ARTICLE 6
                      DEFAULTS AND REMEDIES . . . . . . . . . . . . . . .     67
Section 6.1.   Events of Default. . . . . . . . . . . . . . . . . . . . .     67
Section 6.2.   Acceleration . . . . . . . . . . . . . . . . . . . . . . .     70
Section 6.3.   Other Remedies . . . . . . . . . . . . . . . . . . . . . .     70
Section 6.4.   Waiver of Past Defaults. . . . . . . . . . . . . . . . . .     71
Section 6.5.   Control by Majority. . . . . . . . . . . . . . . . . . . .     71
Section 6.6.   Limitation on Suits. . . . . . . . . . . . . . . . . . . .     71
Section 6.7.   Rights of Holders of Securities to Receive Payment . . . .     72
Section 6.8.   Collection Suit by Trustee . . . . . . . . . . . . . . . .     72
Section 6.9.   Trustee May File Proofs of Claim . . . . . . . . . . . . .     72
Section 6.10.  Priorities . . . . . . . . . . . . . . . . . . . . . . . .     73
Section 6.11.  Undertaking for Costs. . . . . . . . . . . . . . . . . . .     74
Section 6.12.  Restoration of Rights and Remedies . . . . . . . . . . . .     74

                            ARTICLE 7
                             TRUSTEE. . . . . . . . . . . . . . . . . . .     74
Section 7.1.   Duties of Trustee. . . . . . . . . . . . . . . . . . . . .     74
Section 7.2.   Rights of Trustee. . . . . . . . . . . . . . . . . . . . .     76
Section 7.3.   Individual Rights of Trustee . . . . . . . . . . . . . . .     77
Section 7.4.   Trustee's Disclaimer . . . . . . . . . . . . . . . . . . .     77
Section 7.5.   Notice of Defaults . . . . . . . . . . . . . . . . . . . .     77
Section 7.6.   Reports by Trustee to Holders of the Securities. . . . . .     78
Section 7.7.   Compensation and Indemnity . . . . . . . . . . . . . . . .     78
Section 7.8.   Replacement of Trustee . . . . . . . . . . . . . . . . . .     79
Section 7.9.   Successor Trustee by Merger, etc . . . . . . . . . . . . .     80
Section 7.10.  Eligibility; Disqualification. . . . . . . . . . . . . . .     81
Section 7.11.  Preferential Collection of Claims Against Company. . . . .     81

                            ARTICLE 8
               LEGAL DEFEASANCE AND COVENANT DEFEASANCE. . . . . . . . . .    81
Section 8.1.   Option to Effect Legal Defeasance or Covenant Defeasance. .    81
Section 8.2.   Legal Defeasance and Discharge. . . . . . . . . . . . . . .    81


                                      -ii-
<PAGE>
                                                                            Page
                                                                            ----
Section 8.3.   Covenant Defeasance . . . . . . . . . . . . . . . . . . . .    82
Section 8.4.   Conditions to Legal or Covenant Defeasance. . . . . . . . .    83
Section 8.5.   Deposited Money and Government Securities to be Held in 
               Trust; Other Miscellaneous Provisions . . . . . . . . . . .    84
Section 8.6.   Repayment to Company. . . . . . . . . . . . . . . . . . . .    85
Section 8.7.   Reinstatement . . . . . . . . . . . . . . . . . . . . . . .    85

                            ARTICLE 9
               AMENDMENT, SUPPLEMENT AND WAIVER. . . . . . . . . . . . . .    86
Section 9.1.   Without Consent of Holders of Securities. . . . . . . . . .    86
Section 9.2.   With Consent of Holders of Securities . . . . . . . . . . .    87
Section 9.3.   Compliance with Trust Indenture Act . . . . . . . . . . . .    89
Section 9.4.   Revocation and Effect of Consents . . . . . . . . . . . . .    89
Section 9.5.   Notation on or Exchange of Securities . . . . . . . . . . .    89
Section 9.6.   Trustee to Sign Amendment, etc. . . . . . . . . . . . . . .    89

                            ARTICLE 10
                          SUBORDINATION. . . . . . . . . . . . . . . . . .    90
Section 10.1.  Agreement to Subordinate. . . . . . . . . . . . . . . . . .    90
Section 10.2.  Certain Definitions . . . . . . . . . . . . . . . . . . . .    90
Section 10.3.  Liquidation; Dissolution; Bankruptcy. . . . . . . . . . . .    91
Section 10.4.  Default on Designated Senior Debt . . . . . . . . . . . . .    94
Section 10.5.  Acceleration of Securities. . . . . . . . . . . . . . . . .    95
Section 10.6.  When Distribution Must Be Paid Over . . . . . . . . . . . .    95
Section 10.7.  Notice by Company . . . . . . . . . . . . . . . . . . . . .    96
Section 10.8.  Subrogation . . . . . . . . . . . . . . . . . . . . . . . .    96
Section 10.9.  Relative Rights . . . . . . . . . . . . . . . . . . . . . .    96
Section 10.10. Subordination May Not Be Impaired by Company or the 
               Subsidiary Guarantors . . . . . . . . . . . . . . . . . . .    97
Section 10.11. Payment, Distribution or Notice to Representative . . . . .    97
Section 10.12. Rights of Trustee and Paying Agent. . . . . . . . . . . . .    98
Section 10.13. Authorization to Effect Subordination . . . . . . . . . . .    98
Section 10.14. Amendments. . . . . . . . . . . . . . . . . . . . . . . . .    99
Section 10.15. No Waiver of Subordination Provisions . . . . . . . . . . .    99

                            ARTICLE 11
                    THE SUBSIDIARY GUARANTEES. . . . . . . . . . . . . . .    99
Section 11.1.  The Subsidiary Guarantees . . . . . . . . . . . . . . . . .    99
Section 11.2.  Subordination of Subsidiary Guarantees. . . . . . . . . . .   101
Section 11.3.  Subsidiary Guarantors May Consolidate, etc., on Certain 
               Terms . . . . . . . . . . . . . . . . . . . . . . . . . . .   101
Section 11.4.  Releases of Subsidiary Guarantees . . . . . . . . . . . . .   102
Section 11.5.  Limitation on Subsidiary Guarantor Liability. . . . . . . .   103
Section 11.6.  "Trustee" to Include Paying Agent . . . . . . . . . . . . .   103

                            ARTICLE 12
                          MISCELLANEOUS. . . . . . . . . . . . . . . . . .   104
Section 12.1.  Trust Indenture Act Controls. . . . . . . . . . . . . . . .   104
Section 12.2.  Notices . . . . . . . . . . . . . . . . . . . . . . . . . .   104
Section 12.3.  Communication by Holders of Securities with Other Holders
                of Securities. . . . . . . . . . . . . . . . . . . . . . .   105
Section 12.4.  Certificate and Opinion as to Conditions Precedent. . . . .   105
Section 12.5.  Statements Required in Certificate or Opinion . . . . . . .   106
Section 12.6.  Rules by Trustee and Agents . . . . . . . . . . . . . . . .   106
Section 12.7.  No Personal Liability of Directors, Officers, 


                                     -iii-
<PAGE>
                                                                            Page
                                                                            ----
               Employees and Stockholders. . . . . . . . . . . . . . . . .   106
Section 12.8.  Governing Law . . . . . . . . . . . . . . . . . . . . . . .   107
Section 12.9.  No Adverse Interpretation of Other Agreements . . . . . . .   107
Section 12.10. Successors. . . . . . . . . . . . . . . . . . . . . . . . .   107
Section 12.11. Severability. . . . . . . . . . . . . . . . . . . . . . . .   107
Section 12.12. Counterpart Originals . . . . . . . . . . . . . . . . . . .   107
Section 12.13. Table of Contents, Headings, Etc. . . . . . . . . . . . . .   107
</TABLE>


                                   EXHIBITS
Exhibit A FORM OF INITIAL SECURITY
Exhibit B FORM OF EXCHANGE SECURITY
EXHIBIT C FORM OF SUBSIDIARY GUARANTEE

                                     -iv-

<PAGE>



                           PURCHASE AND SALE AGREEMENT


                                  BY AND BETWEEN


                      BASS ENTERPRISES PRODUCTION CO., ET AL


                                    AS SELLERS


                                       AND


                           CONTINENTAL RESOURCES, INC.


                                     AS BUYER


                               DATED MARCH 28, 1998


<PAGE>

<TABLE>
                        TABLE OF CONTENTS                    PAGE

<S>                                                          <C>
 1. Property to be Sold and Purchased . . . . . . . . . . . .  1

 2. Purchase Price. . . . . . . . . . . . . . . . . . . . . .  2

 3. Deposit . . . . . . . . . . . . . . . . . . . . . . . . .  2

 4. Allocation of Base Purchase Price . . . . . . . . . . . .  2

 5. Seller's Representations  . . . . . . . . . . . . . . . .  2

 6. Buyer's Representations . . . . . . . . . . . . . . . . .  3

 7. Covenants of Seller and Buyer Pending Closing . . . . . .  4

 8. Due Diligence Reviews . . . . . . . . . . . . . . . . . .  6

 9. Adverse Environmental Conditions. . . . . . . . . . . . .  8

10. Disposal of Materials, Substances, and Wastes; 
     Compliance with Law  . . . . . . . . . . . . . . . . . . 10

11. Certain Price Adjustments to the Base Purchase Price  . . 11

12. Conditions Precedent to Buyer's Obligations . . . . . . . 12

13. Conditions Precedent to Seller's Obligations  . . . . . . 13

14. The Closing . . . . . . . . . . . . . . . . . . . . . . . 13

15. After Closing . . . . . . . . . . . . . . . . . . . . . . 15

16. Certain Accounting Adjustments to the Purchase Price  . . 16

17. Assumption and Indemnification. . . . . . . . . . . . . . 18

18. Environmental Assessment and Indemnification by Buyer . . 19

19. Disclaimer of Warranties. . . . . . . . . . . . . . . . . 19

20. Buyer's Covenant Not to Sue Seller Group . .  . . . . . . 20

21. Commissions . . . . . . . . . . . . . . . . . . . . . . . 20

22. Casualty Loss . . . . . . . . . . . . . . . . . . . . . . 20

23. Notices . . . . . . . . . . . . . . . . . . . . . . . . . 20

24. Survival of Provisions. . . . . . . . . . . . . . . . . . 20

25. Miscellaneous Matters . . . . . . . . . . . . . . . . . . 21
</TABLE>


Exhibit A - Oil and Gas Leases

Exhibit B - Wells

Exhibit C - Assignment and Bill of Sale

Exhibit D - Suits, Actions, or other Legal Proceedings Pending

Exhibit E - Allocation of Values

<PAGE>

                         PURCHASE AND SALE AGREEMENT

     This Agreement, dated March 28, 1998, is made by and between the 
signatory parties shown below under "Sellers" whose address is 201 Main 
Street, Fort Worth, Texas 76102 (hereinafter collectively called "Seller") 
and Continental Resources, Inc., whose address is P.O. Box 1032, Enid, 
Oklahoma 73702 (hereinafter called Buyer");

                            W I T N E S S E T H:

     WHEREAS, Buyer desires to purchase the Properties, as defined below, 
from Seller, and Seller desires to sell the same Properties to Buyer, subject 
to the terms and conditions of this Agreement.

     WHEREAS, It is the parties' intent that Buyer assume all responsibility 
and liability as provided herein for all matters relating to the Properties 
to be assigned.

     NOW, THEREFORE, In consideration of the mutual promises made herein and 
the benefits to be derived hereunder, and other good and valuable 
consideration, the sufficiency of which is hereby acknowledged, Seller and 
Buyer agree as follows:

     1.   PROPERTY TO BE SOLD AND PURCHASED.  Seller agrees to sell, and 
Buyer agrees to purchase, for the consideration herein set forth, and subject 
to the terms and provisions herein contained, the following described 
Properties, rights, and interests:

          (a)  All rights, titles, and interests of Seller in and to:  1) the
          oil, gas, and mineral leases described in Exhibit A hereto; and 2) the
          wells described in Exhibit B hereto;

          (b)  All rights, titles, and interests of Seller in and to, or
          otherwise derived from, all presently existing and valid oil, gas, and
          mineral unitization, pooling, and communitization agreements,
          declarations, and orders (including, without limitation, all units
          formed under orders, rules, regulations, or other official acts of any
          federal, state, or other authority having jurisdiction, and voluntary
          unitization agreements, designations, and declarations) relating to
          the properties described in subsection 1.(a) to the extent such
          rights, titles, and interests are attributable to the properties
          described in subsection 1.(a);

          (c)  All rights, titles, and interests of Seller in and to all
          presently existing and valid production sales contracts, operating
          agreements, and other agreements and contracts that relate to any of
          the properties described in subsections 1.a. and 1.b., to the extent
          such rights, titles, and interests are assignable and attributable to
          the properties described in subsections 1.(a) and 1.(b);

          (d)  All rights, titles, and interests of Seller in and to all
          rights-of-way, easements, surface leases, permits, and licenses
          appurtenant to the properties described in subsections 1.(a) and
          1.(b); and

          (e)  All rights, titles, and interests of Seller in and to all
          materials, supplies, machinery, equipment, improvements, and other
          personal property and fixtures (including, but not limited to,
          wellhead equipment, pumping units, flowlines, tanks, buildings,
          injection facilities, saltwater disposal facilities, compression
          facilities, gathering systems, and other equipment) located on the
          properties described in subsections 1.(a) and 1.(b) and used in
          connection with the exploration, development, operation, or
          maintenance thereof.

The properties and interests specified in subsections 1.(a), 1.(b), 1.(c), 
1.(d) and 1.(e) are herein sometimes collectively called the "Properties".  
The defined term "Properties" shall include seismic data, geological or 
geophysical data, including interpretations, environmental studies, or other 
similar data, or any interpretations thereof or other data or records related 
thereto.  Seller shall provide Buyer with such data Seller has in its files, 
excluding any interpretations, engineering 

                                       1
<PAGE>

reports and evaluations, Seller financial information and all data which 
Seller considers proprietary or confidential or that Seller cannot provide to 
Buyer without breaching, or risking a breach of, an agreement with a third 
party.

     2.   PURCHASE PRICE.  The unadjusted purchase price for the Properties 
shall be Eighty Six Million Five Hundred Thousand Dollars ($86,500,000.00), 
payable in United States dollars, (herein called the "Base Purchase Price"). 
The Base Purchase Price may be adjusted, as provided in Sections 7.(c), 11. 
and 16. hereof.  The Base Purchase Price, as so adjusted and as otherwise 
adjusted by mutual agreement of the parties herein, shall be called the 
"Purchase Price."

     3.   DEPOSIT.  Upon entering into this Agreement, as evidence of good 
faith, Buyer shall pay to Seller Eight Million Six Hundred Fifty Thousand 
Dollars ($8,650,000.00) hereinafter called the "Deposit".  If Buyer and 
Seller consummate the transaction contemplated hereby in accordance with the 
terms hereof, the Deposit shall be applied to the Base Purchase Price.  If 
Buyer and Seller do not consummate the transaction contemplated hereby 
because of a material default by Seller, in the absence of a default by 
Buyer, Seller shall return the Deposit to Buyer and shall, in addition, pay 
to Buyer the sum of Two Million Five Hundred Thousand Dollars ($2,500,000.00) 
as liquidated damages and not as a penalty.  Except as provided in Section 
12., if Buyer fails or refuses to consummate the transaction contemplated 
hereby, Seller shall retain the Deposit as liquidated damages and not as a 
penalty.  Buyer stipulates that Seller's damages in the event of Buyer's 
wrongful failure to close would be uncertain and that the amount of 
liquidated damages provided herein is reasonable.  Forfeiture of the Deposit 
as liquidated damages as provided herein shall be Seller's sole remedy at law 
or in equity for Buyer's failure to close as provided in this Agreement.  In 
no event shall the Deposit accrue interest.

     4.   ALLOCATION OF BASE PURCHASE PRICE.  Buyer has allocated the Base 
Purchase Price to the Properties by various categories.  These categories and 
the allocations thereto are shown on Exhibit E and have been made in good 
faith by Buyer and may be relied upon by Seller for all purposes of this 
Agreement.

     5.   SELLER'S REPRESENTATIONS.  Each of the individuals and entities 
comprising Seller represent to Buyer that:

          (a)  Each (other than natural persons) is a legal entity duly
          organized and legally existing under the laws of the State of Texas. 
          Each corporation and limited partnership is qualified to do business
          in Wyoming and is in good standing, or will be at Closing.

          (b)  Each has full power to enter into this Agreement and perform its
          obligations hereunder and has taken all necessary action to enter into
          this Agreement and perform its obligations hereunder.

          (c)  Execution and delivery of this Agreement, the consummation of the
          transaction contemplated hereby, and compliance with the terms hereof,
          will not result in any default under any agreement or instrument to
          which Seller, or any individual party thereof, is a party or by which
          the Properties are bound that would be material to this transaction. 
          Execution and delivery of this Agreement will not violate any
          contractual provision, order, writ, injunction, decree, statute, rule,
          or regulation applicable to Seller, or any individual party thereof,
          or to the Properties that would be material to this transaction,
          except the following:

          (i)  Any waivers of preferential rights to purchase that must be
          obtained from third parties;

          (ii)  Compliance with the Hart-Scott-Rodino Antitrust Improvements Act
          of 1976 (the "HSR Act"); and,

                                       2
<PAGE>

          (iii)  Any approvals that must be obtained from governmental entities
          who are lessors under leases included in the Properties (or who
          administer such leases for such lessors) and that are customarily
          obtained post-closing.

          (d)  This Agreement and the Assignment and Bill of Sale provided for
          in Section 14.(a)(i) hereof and any other documentation provided for
          herein to be executed by Seller, will, when executed and delivered,
          constitute the legal, valid, and binding obligations of Seller,
          enforceable according to their terms, except as limited by bankruptcy
          or other laws applicable generally to creditor's rights and as limited
          by general, equitable principles.

          (e)  Except as disclosed on Exhibit D, there are no pending suits,
          actions, or other proceedings in which Seller is a party that
          materially affect the Properties (including, without limitation, any
          actions challenging or pertaining to Seller's title to any of the
          Properties) or affect the execution and delivery of this Agreement or
          the consummation of the transaction contemplated hereby.

     6.   BUYER'S REPRESENTATIONS.  Buyer represents to Seller that:

          (a)  Buyer is a corporation duly organized and legally existing under
          the laws of its state of organization.  Buyer is qualified to do
          business in Wyoming and is in good standing, or will be at Closing.

          (b)  Buyer has full power and ability to enter into and perform its
          obligations under this Agreement (including, but not limited to the
          payment of the Purchase Price at Closing) and has taken all necessary
          action to enter into this Agreement and perform its obligations
          hereunder.

          (c)  Buyer's execution and delivery of this Agreement, the
          consummation of the transaction contemplated hereby, and Buyer's
          compliance with the terms hereof, will not result in any default under
          any agreement or instrument to which Buyer is a party or by which the
          Properties are bound that would be material to this transaction.
          Buyer's execution and delivery of this Agreement will not violate any
          contractual provision, order, writ, injunction, decree, statute, rule,
          or regulation applicable to Buyer or to the Properties that would be
          material to this transaction, except the following:

               (i)  Any waivers of preferential rights to purchase that must be
               obtained from third parties;

               (ii)  Compliance with the "HSR Act;" and,

               (iii)  Any approvals that must be obtained from governmental
               entities who are lessors under leases included in the Properties
               (or who administer such leases for such lessors) and that are
               customarily obtained post-closing.

          (d)  This Agreement and the Assignment and Bill of Sale provided for
          in Section 14.(a)(i) hereof and any other documentation provided for
          herein to be executed by Buyer, will, when executed and delivered,
          constitute, the legal, valid, and binding obligations of Buyer,
          enforceable according to their terms, except as limited by bankruptcy
          or other laws applicable generally to creditor's rights and as limited
          by general, equitable principles.

          (e)  There are no pending suits, actions, or other proceedings in
          which Buyer is a party that materially affect the execution and
          delivery of this Agreement or the consummation of the transaction
          contemplated hereby.

          (f)  Buyer is a knowledgeable purchaser, owner, and operator of oil
          and gas 

                                       3
<PAGE>

          properties, has the ability to evaluate, and has evaluated, the 
          Properties for purchase, and is acquiring the Properties for its
          own account and not with the intent to make a distribution within the
          meaning of the Securities Act of 1933, as amended (and the rules and
          regulations pertaining thereto), or a distribution thereof in
          violation of any other applicable securities laws, rules, or
          regulations.

          (g)  Buyer wishes to replace Seller as operator in every well
          described on Exhibit B which Seller presently operates.  Accordingly,
          Buyer is, or will become, qualified to operate such Properties under
          the applicable laws, rules, and regulations of the jurisdiction in
          which such Properties are located.

     7.   COVENANTS OF SELLER AND BUYER PENDING CLOSING.  Between the date of
this Agreement and the Closing Date:

          (a)  Seller shall permit Buyer access as follows:

               (i)  Seller shall give Buyer and its attorneys and other
               representatives, who have a legitimate need to know, access at
               all reasonable times during normal business hours to the
               Properties and, at Seller's office, to Seller's records
               (including, without limitation, title files, division order
               files, well files, production records, equipment inventories, and
               production severance, and ad valorem tax records) pertaining to
               the ownership and operation of the Properties, to conduct due
               diligence reviews as contemplated by Section 8. below. Buyer may
               make copies of such records at its expense but shall, if Seller
               so requests, return all copies so made if the Closing does not
               occur. Seller shall not be obligated to provide Buyer with access
               to any records or data that Seller considers to be proprietary or
               confidential or that Seller cannot provide to Buyer without
               breaching, or risking a breach of, confidentiality agreements
               with other parties.  Until Closing, all records and data provided
               shall be subject to the previously executed Confidentiality
               Agreement between Buyer and Seller. SELLER MAKES NO WARRANTY, AND
               EXPRESSLY DISCLAIMS ALL WARRANTIES, AS TO THE ACCURACY OR
               COMPLETENESS OF THE FILES AND OTHER INFORMATION THAT IT MAY
               PROVIDE TO BUYER OR THAT MAY BE PROVIDED BY OTHERS.

               (ii)  Seller shall make a good faith effort to give Buyer, or
               Buyer's authorized representatives, who have a legitimate need to
               know, at reasonable times and upon adequate notice to Seller,
               physical access to the Properties for the purpose of inspecting
               same.  Buyer recognizes that some of the Properties are operated
               by third parties and that Seller's ability to obtain access to
               such Properties, and the manner and extent of such access, is
               subject to the consent of such third parties.  Buyer agrees to
               comply fully with the rules, regulations, and any instructions
               issued by Seller or third party (where a Property is operated by
               such third party) regarding the actions of Buyer while upon,
               entering, or leaving the Properties.

               (iii)  If Buyer exercises rights of access under this Section or
               otherwise, or conducts examinations or inspections under this
               Section or otherwise, then (a) Buyer will be accompanied by
               Seller's representative at all times; (b) such access,
               examination, and inspection shall be at Buyer's sole risk, cost,
               and expense, and Buyer waives and releases all claims against
               Seller (its affiliates and their respective directors, officers,
               employees,attorneys, contractors, and agents) arising in any way
               therefrom or in any way connected therewith or arising in
               connection with the conduct of its directors, officers,
               employees, attorneys, contractors, and agents in connection
               therewith; and (c) BUYER SHALL RELEASE, INDEMNIFY, DEFEND, AND
               HOLD HARMLESS SELLER (AND 

                                       4
<PAGE>

               ITS PARENT, SUBSIDIARY COMPANIES, AND OTHER AFFILIATES 
               AND THEIR RESPECTIVE OFFICERS, DIRECTORS, EMPLOYEES, 
               ATTORNEYS, CONTRACTORS, AND AGENTS) (HEREINAFTER COLLECTIVELY 
               REFERRED TO AS "SELLER GROUP") FROM ANY AND ALL CLAIMS, 
               ACTIONS, CAUSES OF ACTION, LIABILITIES, DAMAGES, LOSSES,COSTS, 
               OR EXPENSES (INCLUDING, WITHOUT LIMITATION, COURT COSTS AND 
               ATTORNEYS' FEES), OR LIENS OR ENCUMBRANCES FOR LABOR OR
               MATERIALS, ARISING OUT OF OR IN ANY WAY CONNECTED WITH SUCH
               ACCESS, EXAMINATION, AND INSPECTION.  THE FOREGOING RELEASE AND
               INDEMNIFICATION SHALL APPLY WHETHER OR NOT SUCH CLAIMS, ACTIONS,
               CAUSES OF ACTION, LIABILITIES, DAMAGES, LOSSES, COSTS, OR
               EXPENSES ARISE OUT OF (i) NEGLIGENCE (INCLUDING SOLE NEGLIGENCE,
               SIMPLE NEGLIGENCE, CONCURRENT NEGLIGENCE, ACTIVE OR PASSIVE
               NEGLIGENCE, OR OTHERWISE, BUT EXPRESSLY NOT INCLUDING GROSS
               NEGLIGENCE OR WILLFUL MISCONDUCT) OF SELLER OR ANY OTHER
               INDEMNIFIED PARTY, OR (ii) STRICT LIABILITY.

          (b)  Seller shall continue to conduct its business in its ordinary
          course, and in accordance with all applicable ordinances, statutes,
          rules, and regulations of all local, state, and federal governments. 
          Seller shall not enter into or assume any contract or commitment which
          is not in the ordinary course of business as heretofore conducted in
          association with the Properties and shall carry on its business and
          operate the Properties as a reasonably prudent operator. Subject to
          existing contractual obligations, Seller shall not conduct, or commit
          to participate in, on behalf of Buyer, any operation on the
          Properties, or lands pooled or unitized therewith and shall not enter
          into a contract for the sale of crude oil from the Properties
          continuing in effect past the Effective Date without Buyer's prior
          written consent. However, Seller may take such steps and incur such
          expenses as it deems necessary in its sole opinion to deal with an
          emergency to safeguard any part of the Property without first
          consulting with Buyer.  As soon as possible after the emergency,
          Seller shall advise Buyer of such emergency action.  Except as set
          forth in this Agreement, Seller shall not sell, assign, transfer,
          mortgage, farmout, or otherwise dispose of, abandon, or encumber any
          material portion of the Properties.

          (c)  Seller shall use reasonable efforts, consistent with industry
          practices in transactions of this type, to identify, with respect to
          each material portion of the Properties, (i) all preferential rights
          to purchase that would apply to the transaction contemplated hereby
          and (ii) the parties holding such rights.  In attempting to identify
          the same, Seller shall not be obligated to go beyond its own records.
          Seller shall request from the parties so identified, and in accordance
          with the documents creating such rights, waivers of the preferential
          rights to purchase. Seller shall have no obligation hereunder other
          than to attempt to identify such preferential rights and to request
          such waivers.  Seller shall not be obligated to assure that such
          waivers are obtained.  Seller may tender to any party refusing to
          waive such a preferential right the interest covered by such right at
          a value as mutually agreed to by Buyer and Seller which shall be made
          in good faith, but in no event shall the value of a well exceed the
          value assigned to it by Ryder-Scott Company, an independent petroleum
          reservoir engineering company, in its recent Reserve Report dated
          January 14, 1998, prepared on behalf of Seller (hereinafter referred
          to as the "Ryder-Scott Report") using the present value (future net
          income before income taxes discounted at ten percent (10%)) of the
          total proved reserves. If Buyer and Seller are unable to agree on a
          value, the value for a well shall be determined as provided in Section
          11.(a)(ii) using the V/T = PVW/PVC equation for Properties falling in
          Categories A and B as shown on Exhibit E.  This value shall be used in
          determining the value of any 

                                       5
<PAGE>

          interest in a well covered by a preferential right to purchase.  
          The value shall be determined using the formula as provided in 
          Section 11.(a)(iii) for Properties falling in Category C where 
          F=Seller's net acres subject to a preferential right to purchase.  
          To the extent that such an interest is actually sold to a party 
          exercising such a preferential right, it shall be excluded from 
          the transaction contemplated hereby, and the Base Purchase Price 
          shall be reduced by the amount such party paid to Seller for such 
          interest unless the parties hereto agree otherwise.

          (d)  If applicable, as soon as practicable after the execution hereof,
          Buyer shall prepare and submit any necessary filings in connection
          with the transaction contemplated by this Agreement under the HSR Act.
          Buyer shall pay all filing fees in connection with such filing, shall
          request expedited treatment of such filing by the Federal Trade
          Commission ("FTC"), shall promptly make any appropriate or necessary
          subsequent or supplemental filings, and shall furnish to Seller copies
          of all filings made under the HSR Act at the same time they are filed
          with the FTC.  Seller shall cooperate with Buyer as to all filings
          required by the HSR Act.

          (e)  After both parties have executed this Agreement, Seller shall
          deliver to Buyer a copy of its "pay list" for each well listed on
          Exhibit B (which pay list shall include the name, address, social
          security number, and applicable share of proceeds of production, to
          the extent such information is contained in Seller's records, for each
          party to whom Seller is disbursing proceeds of production with respect
          to such property); and, a list of all parties for whom it is holding
          in suspense proceeds of production. Seller does not represent or
          warrant to Buyer the accuracy of the "pay lists" so delivered.

          (f)  At such time that all Asserted Defects (as hereinafter defined)
          have been fully resolved to the satisfaction of both Parties or if no
          Defects have been asserted by Buyer as of the Defect Notice Date (as
          hereinafter defined)upon Seller's receipt of Buyer's written
          confirmation and assurance that all Defects, if any, have been
          resolved and Buyer is prepared to close the transaction subject only
          to Seller's performance of its closing obligations as set forth in
          Section 14(a), Seller shall give Buyer and its accountants access to
          any and all accounting information in Seller's possession reasonably
          requested by Buyer for the preparation by Buyer, at its sole expense
          and risk, of pro-forma financial statements reflecting the financial
          performance of the Properties for the most recent three (3) calendar
          year(s). Buyer agrees that none of the information compiled for the
          purpose of this limited audit shall be used for the purpose of due
          diligence by Buyer or otherwise to assert any claim against Seller. 
          Seller shall have no responsibility whatever for the financial
          statements so prepared by Buyer.

     8.   DUE DILIGENCE REVIEWS.

          (a)  The term "Defect" as used in this Section shall mean any of the
          following:

               (i)  As of the Effective Date, Seller's ownership of a well
               listed on Exhibit B hereto either, (A) entitles Seller to receive
               a share of the oil, gas, and other hydrocarbons produced from, or
               allocated to, such well that is less than the share set forth on
               Exhibit B for such well in the columns headed "Net Revenue
               Interest (NRI)" and "Overriding Royalty Interest (ORI)",
               excepting any decreases caused by an increase in the landowner's
               royalty payable to the Federal and State Governments or pursuant
               to contractual obligations, including, without limitation,
               sliding scale overriding royalties, which are tied to amount of
               production, or as mandated by Federal and State statutes or as
               promulgated in the respective Federal and State Rules and
               Regulations; or, (B) causes Seller to bear a share of the cost of
               operating such well greater than the share set forth on Exhibit B
               for such well in the column headed "Working Interest (WI)"
               (without a proportionate increase in the share of 

                                       6
<PAGE>

               production to which Seller is entitled from such well);

               (ii)  Seller's ownership of a Property is subject to a lien other
               than (A) a lien that will be released at or before Closing, (B) a
               lien for taxes not yet delinquent, or (C) a lien under an
               operating agreement or similar agreement, to the extent the same
               relates to expenses incurred that are not yet due;

               (iii)  Seller's ownership of a Property is subject to a
               preferential right to purchase, unless a waiver of such right has
               been obtained with respect to the transaction contemplated hereby
               or an appropriate tender of the applicable interest has been made
               to the party holding such right and the period of time required
               for such party to exercise such right has expired without such
               party exercising such right;

               (iv)  Seller's ownership of a Property is subject to an
               imperfection in title that, if asserted, would cause a Defect, as
               defined in clause (i) above, to exist, and such imperfection in
               title normally would not be waived by reasonable and prudent
               persons engaged in the oil and gas business with knowledge of all
               the facts and their legal bearing and would materially impair or
               prevent Buyer from receiving payment from the purchasers of
               production, and would prevent the economic benefit Buyer could
               reasonably expect by acquiring the Properties;

               (v)  Seller's ownership of a non-producing Property is subject to
               an imperfection in title that, if asserted, would cause Seller's
               ownership as shown on Exhibit A to be less; and such imperfection
               in title normally would not be waived by reasonable and prudent
               persons engaged in the oil and gas business with knowledge of all
               the facts and their legal bearing and would materially prevent
               the economic benefit Buyer could reasonably expect by acquiring
               such Property.

          (b)  Buyer may conduct, to the extent it deems appropriate and at its
          sole risk and cost, such examinations and investigations as it may
          choose with respect to the Properties in order to determine whether
          "Defects" exist.  Unless waived, Buyer shall notify Seller in writing
          of such Defects as soon as they are identified, but no later than ten
          (10) days prior to the date upon which Closing is scheduled to occur
          pursuant to Section 14. [and not as extended pursuant to 14.(i) or
          14.(ii)] (hereinafter "Defect Notice Date").  Those Defects identified
          in such notice to Seller are herein called "Asserted Defects".  Such
          notification shall include a description of the Asserted Defect, the
          lease(s) described on Exhibit A affected by such Asserted Defect, the
          well(s) listed on Exhibit B to which the Asserted Defect relates, and
          all supporting documentation reasonably necessary fully to describe in
          detail the basis for the Asserted Defect; and, for each property,
          lease and applicable well, the size of any variance from "Net Revenue
          Interest (NRI)", "Overriding Royalty Interest (ORI)", or "Working
          Interest (WI)" set forth in Exhibit B that does or could result from
          such Asserted Defect.  Buyer hereby waives all Defects that it fails
          to identify to Seller as Asserted Defects on or before the Defect
          Notice Date.  If Buyer timely notifies Seller of Asserted Defects,
          Seller (i) shall have the right (but not the obligation) to attempt to
          cure such Asserted Defects prior to Closing, and (ii) shall also have
          the right (which may be exercised at any time before the Closing Date)
          to postpone the Closing by designating a new Closing Date not later
          than thirty (30) days after the Closing Date then existing, if Seller
          desires additional time to attempt to cure (including determining if
          it will attempt to cure) one or more Asserted Defects. In lieu of
          curing or attempting to cure an Asserted Defect, Seller may elect, at
          any time prior to Closing with respect to any Asserted Defect, to
          indemnify and hold Buyer harmless from and against any actual damages
          or loss (but specifically excluding consequential damages, special
          damages, or similar damages) Buyer may suffer as a result of a third
          party claim based on such Asserted Defect; provided, 

                                       7
<PAGE>

          unless Buyer consents, Seller may not so elect to indemnify Buyer 
          in lieu of curing such Asserted Defect(s) if the amount attributable 
          to such Asserted Defect(s) exceeds One Million Dollars($1,000,000.00).
          If Seller elects to indemnify Buyer as to an Asserted Defect, such 
          Asserted Defect will be treated under this Agreement as cured and, as 
          to such indemnified Asserted Defect, SELLER SHALL RELEASE, INDEMNIFY, 
          DEFEND, AND HOLD HARMLESS BUYER FROM AND AGAINST ANY AND ALL LOSS, 
          COST, DAMAGE, EXPENSE, OR LIABILITY WHATSOEVER, INCLUDING ATTORNEYS' 
          FEES, ARISING OUT OF THE ASSERTED DEFECT SELLER HAS ELECTED TO 
          INDEMNIFY (EXCEPT ANY CAUSED SOLELY BY THE GROSS NEGLIGENCE OR WILLFUL
          MISCONDUCT OF BUYER).

          (c)  Buyer shall have the right to make an environmental assessment of
          the Properties during the period beginning on the date of execution of
          this Agreement and ending on the Defect Notice Date.  Subject to the
          provisions regarding Buyer's rights to access under Section 7 hereof,
          Buyer and its agents shall have the right to enter upon the Properties
          and all buildings and improvements thereon, inspect the same, conduct
          soil and water tests and borings, and generally conduct such tests,
          examinations, investigations, and studies as Buyer may deem necessary
          or appropriate for the preparation of appropriate engineering and
          other reports in relation to the Properties and their physical and
          environmental condition. If Buyer proposes to undertake an
          environmental assessment, Buyer's proposed plan, the consultants to be
          used, and testing protocol must be approved by Seller before the work
          may begin.  Buyer agrees promptly to provide to Seller a copy of the
          environmental assessment, including any reports, data, and
          conclusions. Buyer shall keep all data and information acquired by
          such examinations and the results of all analyses of such data and
          information strictly confidential and shall not disclose same to any
          person or agency without the prior written approval of Seller. BUYER
          SHALL RELEASE, INDEMNIFY, DEFEND, AND HOLD HARMLESS THE SELLER GROUP
          FROM AND AGAINST ANY AND ALL LOSS, COST, DAMAGE, EXPENSE, OR LIABILITY
          WHATSOEVER, INCLUDING ATTORNEYS' FEES, ARISING OUT OF ANY
          ENVIRONMENTAL ASSESSMENT INCLUDING, BUT NOT LIMITED TO, INJURY TO OR
          DEATH OF PERSONS OR DAMAGE TO PROPERTY OCCURRING IN, ON, OR ABOUT THE
          PROPERTIES AS A RESULT OF SUCH ACTIVITIES (EXCEPT ANY SUCH INJURIES OR
          DAMAGES CAUSED SOLELY BY THE GROSS NEGLIGENCE OR WILLFUL MISCONDUCT OF
          ANY MEMBER OF THE SELLER GROUP).

          (d)  After the Defect Notice Date, Buyer shall be deemed to have
          inspected the Properties or waived its right to inspect the Properties
          for all purposes and satisfied itself as to their physical and
          environmental condition, both surface and subsurface.

     9.   ADVERSE ENVIRONMENTAL CONDITIONS.

          Seller represents to Buyer that to the best of its knowledge there are
          no environmental conditions, as hereinafter defined, existing as of
          the date hereof which Seller has not disclosed to Buyer.  Seller will
          advise Buyer of any Condition that Seller becomes aware of from the
          date hereof to the Closing Date.

          (a)  Buyer shall have until the Defect Notice Date to notify Seller of
          any material adverse environmental condition of the Properties which
          Buyer deems unacceptable and provide evidence of the condition to
          Seller.  An environmental condition is a material adverse
          environmental condition ("Condition") only if the following criteria
          are met:

               (i)  The environmental condition would have been required to be
               remediated on the Effective Date under the Environmental Laws;
               and,

                                       8
<PAGE>

               (ii)  The total cost to remediate all environmental conditions
               identified by Buyer affecting the Properties to the state
               required by the Environmental Laws is reasonably estimated to be
               at least $100,000.00.

          (b)  "Environmental Law" shall mean any federal, state, or local law,
          rule, regulation, order, or ordinance in effect as of the Effective
          Date of this Agreement pertaining to protecting the public health,
          welfare, and the environment.

          (c)  At Closing, Seller may elect any of the following provided a
          Condition exists:

               (i)  Decrease the Purchase Price by a mutually acceptable amount
               reflecting Seller's proportionate share, based on its working
               interest, of the cost reasonably estimated to remediate a
               Condition affecting the Properties to such a state as required by
               the Environmental Laws;

               (ii)  Remove the affected Properties from this Agreement and
               adjust the Base Purchase Price by an amount mutually agreed to by
               Seller and Buyer. If Buyer and Seller are unable to agree on an
               amount, the value of Properties falling in Categories A and B
               shall be determined as provided in Section 11.(a)(ii) using the
               V/T = PVW/PVC equation and an appropriate adjustment will be made
               using this value. The value of all affected Properties falling in
               Category C shall be determined using the formula in Section
               11.(a)(iii) where F=Seller's net acres affected by the Condition.

               (iii)  Remedy, or, if applicable, agree to indemnify, Buyer in
               accordance with Section 8(b); the Condition, as provided below.

          (d)  If option (c)(i) above is chosen, Buyer shall be responsible for
          any remediation and if the actual cost to remediate a Condition
          exceeds the amount of the estimate, Buyer shall pay the additional
          costs to remediate the Condition as required by applicable law.

          (e)  If option (c.)(iii). above is chosen, the following shall govern
          the remediation:

               (i)  Seller shall be responsible for all negotiations and
               contacts with federal, state, and local agencies and authorities
               with regard to the Condition or remediation. Buyer shall not make
               any independent contacts with any agency, authority, or other
               third party with respect to the Condition or remediation and will
               keep all information regarding the Condition and remediation
               confidential, except in each instance to the extent required by
               applicable law.

               (ii)  Seller shall remediate the Condition to the state agreed
               upon by Seller and Buyer, but in no event will Seller be required
               to remediate the Condition beyond the state required by the
               Environmental Laws.

               (iii)  Buyer will grant and warrant access to the affected
               Properties after Closing to Seller and third parties conducting
               assessments or remediation, to the extent and as long as
               necessary to conduct and complete the assessment or remediation
               work, to remove equipment and facilities, and to perform any
               other activities reasonably necessary in connection with
               assessment or remediation.

               (iv)  Buyer will use its best efforts not to interfere with
               Seller's ingress and egress or assessment or remediation
               activities.  Seller shall make reasonable 

                                       9
<PAGE>

               efforts to perform the work so as to minimize disruption to 
               Buyer's business activities and to the Properties.

               (v)  Seller shall continue remediation of the Condition until the
               first of the following occurs:

                    (1)  The appropriate governmental authorities provide
                    written notice to Seller or Buyer that no further
                    remediation of the Condition is required;

                    (2)  The parties agree that the Condition has been
                    remediated to the state required by the Environmental Laws
                    or as agreed by the parties.

                    Upon the occurrence of either (1) or (2) above, Seller shall
                    notify Buyer that remediation of the Condition is complete
                    and provide a copy of the notification described in (1)
                    above, if applicable.  Upon delivery of Seller's notice,
                    Seller shall be released from all liability and have no
                    further obligations under any provisions of this Agreement
                    in connection with a Condition.

               (vi)  Until Seller completes remediation of a Condition, Seller
               and Buyer will each notify the other of any pending or threatened
               claim, action, or proceeding by any authority or private party
               that relates to or would affect the environmental condition, the
               assessment, or the remediation of the affected Properties.

               (vii)  After Buyer takes over as operator, and before Seller has
               completed remediation of a Condition, if a leak, spill, or
               discharge of any material or substance ("Occurrence") occurs on
               the affected Properties, or any part of them, Buyer will promptly
               notify Seller and act promptly to minimize the effects of the
               Occurrence.  If a spill, leak, or discharge occurs and Seller
               determines that it may affect the area where Seller is conducting
               remediation or assessment, Buyer will hire a consultant (who must
               be acceptable to Seller) to assess the effect of the Occurrence
               on the environmental condition of the affected Properties, and
               the cost of Seller's remediation work and the cost of the
               additional work required as the result of the Occurrence.  Unless
               the Occurrence was caused solely by Seller, Buyer will be
               responsible for the incremental cost of remediating the impact of
               the Occurrence.  If Seller's remediation is expanded to
               incorporate remediation of the Occurrence, Buyer will promptly
               pay its share of costs and expenses to Seller as the work is
               performed, within thirty (30) days of receipt of invoices for the
               work (with supporting documentation).  Payments not made timely
               will bear interest at a rate of twelve percent (12%) per annum or
               the maximum lawful rate, whichever is less, compounded daily from
               the date of Buyer's receipt of the invoice until paid.

               If the cost of the additional work equals or exceeds the cost to
               complete the remediation which would have been incurred but for
               the Occurrence, Seller will pay Buyer the cost that would have
               been incurred by Seller to complete the remediation but for the
               Occurrence.  As consideration for this payment, Buyer will accept
               the environmental condition of the affected Properties as they
               exist on the date of the payment, assume full responsibility for
               remediating the affected Properties and related off-site
               contamination in accordance with this Agreement, and agrees to
               release, not to sue, indemnify, hold harmless, and defend Seller
               as to claims and liabilities arising from the Occurrence to the
               same extent as described in Sections 17., 18., and 20.

                                       10
<PAGE>

               (viii)  If Seller undertakes remediation as to any Properties in
               which Seller's ownership was less than 100%, and provided that
               the expense(s) incurred by Seller in such remediation are fair
               and reasonable, Buyer will bill the other working interest owners
               for their share of the remediation expenses.  Regardless of
               whether Buyer recoups any amount from the other working interest
               owners, Buyer will refund to Seller, within sixty (60) days of
               each Seller invoice, with documentation, any amounts expended by
               Seller over the amount attributable to Seller's former working
               interest share.

               (ix)  If Seller will assess or remediate the affected Properties
               after Closing, the Assignment and Bill of Sale or other
               recordable instrument will restate the rights and obligations of
               this section.

     10.  DISPOSAL OF MATERIALS, SUBSTANCES, AND WASTES; COMPLIANCE WITH LAW. 
Buyer will store, handle, transport, and dispose of or discharge all 
materials, substances, and wastes from the Properties (including produced 
water, drilling fluids, NORM, and other wastes), whether present before or 
after the Effective Date, in accordance with applicable local, state, and 
federal laws and regulations.  Buyer will keep records of the types, amounts, 
and location of materials, substances, and wastes that are stored, 
transported, handled, discharged, released, or disposed of onsite and 
offsite.  When any lease terminates, an interest in which has been assigned 
under this Agreement, Buyer will undertake additional testing, assessment, 
closure, reporting, or remedial action with respect to the Properties 
affected by the termination as is necessary to satisfy all local, state, or 
federal requirements in effect at that time and necessary to restore the 
Properties. Buyer shall assume full responsibility for the operations 
conducted pursuant to this Section 10. and agrees to release, not to sue, 
indemnify, hold harmless, and defend Seller as to all claims and liabilities 
arising therefrom to the same extent as described in Sections 17., 18., and 
20.

     11.  CERTAIN PRICE ADJUSTMENTS TO THE BASE PURCHASE PRICE.

          (a)  If Buyer presents Asserted Defects to Seller as a part of the due
          diligence reviews provided for in Section 8. above, and if Seller is
          unable or unwilling to cure such Asserted Defects prior to Closing, or
          if Buyer has elected to treat a Property affected by a casualty loss
          pursuant to Section 22. as if it were a Property affected by an
          Asserted Defect, then an appropriate adjustment to the Base Purchase
          Price to account for such Asserted Defects shall be made as follows:

               (i)  Buyer and Seller shall attempt to agree upon an appropriate
               adjustment to the Base Purchase Price to account for an Asserted
               Defect which Seller either is unable or unwilling to cure prior
               to Closing, and those Properties, or any part thereof, associated
               with the Asserted Defect shall be excluded from this Agreement
               and any rights of Buyer hereunder to such Properties shall
               terminate.

               (ii)  If Buyer and Seller are unable to agree upon an appropriate
               adjustment with respect to an Asserted Defect which affects
               Seller's interest in any Property falling in either Category A or
               B as shown on Exhibit E, adjustments shall be made as follows:

               Determine the value of all wells contained in the Unit in which
               the Property affected by the Asserted Defect falls by using the
               following equation and solve for V. "Unit" as used herein shall
               mean a drilling and spacing unit as determined by order or rule
               of the Wyoming Oil & Gas Conservation Commission or as otherwise
               permitted by law, or the Participating Area affected by the
               Asserted Defect.

                    V/T = PVW/PVC

                    T = Total amount ($) allocated to category containing Unit
               as shown 

                                       11

<PAGE>

               on Exhibit E.

                    PVW = BFIT PV @ 10% (Future net income before income taxes
               discounted at ten percent (10%)) of total proved reserves in all
               wells in Unit as contained in the Ryder-Scott Report.

                    PVC = BFIT PV @ 10% (Future net income before income taxes
               discounted at ten percent (10%)) of total proved reserves in all
               wells in Category as contained in the Ryder-Scott Report.

               The Base Purchase Price shall be adjusted by the absolute value
               of an amount using the following formula:

                    Adjustment = V X (1-[B/C])

                    V = Value of wells as determined above.

                    B = Correct net revenue interest for all wells in Unit
               including any overriding royalty interest.

                    C = Net revenue interest, including any overriding royalty
               interest, as shown on Exhibit B in all wells in Unit.

               (iii)  If an Asserted Defect affects Seller's interest in any
               Property falling in Category C and Buyer and Seller cannot
               mutually agree on an appropriate adjustment to the Base Purchase
               Price, adjustments shall be made using the following formula:

                    Adjustment = T X F/25,000

                    T = Total amount ($) allocated to Category C as shown on
               Exhibit E.

                    F = Seller's net acres affected by uncured Asserted Defect.

          (b)  If it is determined that Seller's interest in a well listed on
          Exhibit B is greater or lesser than the interest shown for such well
          under the columns headed "Net Revenue Interest (NRI)" and "Overriding
          Royalty Interest (ORI)" on Exhibit B, then Seller or Buyer may propose
          an increase or decrease, as applicable, in the Base Purchase Price, in
          which case such increase or decrease shall be handled in the same
          manner as provided above with respect to adjustments for Asserted
          Defects; provided that the party making such determination shall
          notify the other party of such adjustment on or before the Defect
          Notice Date.  Buyer shall have an affirmative obligation to disclose
          to Seller circumstances discovered by Buyer in its due diligence
          review that could result in an increase in the Base Purchase Price
          hereunder.  No increase in the Base Purchase Price will result from
          any royalty reduction resulting under the Federal Royalty Reduction
          Program.

          (c)  Notwithstanding the adjustments to be made pursuant to
          subsections 11.(a) and 11.(b) above, if such adjustments do not exceed
          $250,000 in the aggregate, no such adjustments shall be made and none
          of the Properties that would otherwise have been excluded pursuant to
          subsection 11.(a) above shall be excluded.  If the adjustments to be
          made pursuant to subsections 11.(a) and 11.(b) above, do exceed
          $250,000.00, the Base Purchase Price shall be adjusted according
          thereto.

     12.  CONDITIONS PRECEDENT TO BUYER'S OBLIGATIONS.  Buyer's obligations at
Closing under this Agreement are subject to each of the following conditions:

          (a)  Seller's representations under this Agreement shall be true and
          accurate in all 

                                       12
<PAGE>

          material respects as of the date when made and at Closing, except 
          as to changes specifically contemplated by this Agreement or consented
          to by Buyer in writing.

          (b)  Seller shall have performed and complied in all material respects
          with every covenant, agreement, and condition required by it under
          this Agreement prior to or at the Closing unless performance or
          compliance therewith shall have been waived by Buyer in writing.

          (c)  If applicable, Buyer and Seller shall have received approval from
          the FTC under the HSR Act of the transaction contemplated by this
          Agreement, or shall have received notification that the waiting period
          under such act has been terminated, or the waiting period under such
          act shall have expired.

          (d)  The Base Purchase Price increase or decrease resulting from the
          adjustments to be made pursuant to subsections 11.(a) and 11.(b) does
          not exceed twenty percent (20%) of the Base Purchase Price.

          (e)  On the Closing Date, no material suit, action, or other
          proceeding against Buyer shall be pending before any court or
          governmental agency seeking to restrain, prohibit, or obtain damages
          or other relief in connection with the consummation of the transaction
          contemplated by this Agreement.

If any such condition precedent to the obligations of Buyer under this Agreement
is not met as of the Closing Date, and if Buyer is not in material breach of its
obligations hereunder, this Agreement may be terminated at the option of Buyer. 
If Buyer thus terminates this Agreement, the Deposit shall be returned to Buyer
and the parties shall have no further obligations to one another hereunder
(other than the indemnifications contained in Sections 7.(a)(iii), 8.(c), and
21. hereof, which shall survive such termination).  Notwithstanding the
foregoing, if a condition set forth above, other than condition 12.(c) or
12.(d), is not met (and is asserted by Buyer as a failure of one of its
conditions of Closing), and if the reasons such condition is not met relate only
to some, but not all, of the Properties, failure of such condition to be met
may, at the option of either Buyer or Seller, be treated as an uncured Asserted
Defect and handled in accordance with the process set forth in Section 11.
above.

     13.  CONDITIONS PRECEDENT TO SELLER'S OBLIGATIONS.  Seller's obligations at
Closing under this Agreement are subject to each of the following conditions:

          (a)  Buyer's representations under this Agreement shall be true and
          accurate in all material respects as of the date when made and at
          Closing, except as to changes specifically contemplated by this
          Agreement or consented to by Seller.

          (b)  Buyer shall have performed and complied in all material respects
          with every covenant, agreement, and condition required by it under
          this Agreement prior to or at the Closing unless compliance therewith
          shall have been waived by Seller.

          (c)  If applicable, Buyer and Seller shall have received approval from
          the FTC under the HSR Act of the transaction contemplated by this
          Agreement, or shall have received notification that the waiting period
          under such act has been terminated, or the waiting period under such
          act shall have expired.

          (d)  The Base Purchase Price reduction or increase resulting from the
          adjustments to be made pursuant to subsections 11.(a) and 11.(b) does
          not exceed twenty percent (20%) of the Base Purchase Price.

          (e)  On the Closing Date, no material suit, action, or other
          proceeding against Seller shall be pending before any court or
          governmental agency seeking to restrain, prohibit, or obtain damages
          or other relief in connection with the consummation of the transaction
          contemplated by this Agreement.

                                       13
<PAGE>

If any such condition precedent to the obligations of Seller under this 
Agreement is not met as of the Closing Date, this Agreement may be terminated 
at the option of Seller.  If Seller terminates this Agreement because of 
Buyer's failure to fulfill condition 13.(a) or 13.(b), the Deposit shall not 
be returned to Buyer.  If Seller terminates this Agreement because of 
conditions 13.(c), 13.(d), or 13.(e), and Buyer is not in material default 
under this Agreement, the Deposit shall be returned to Buyer.  Thereafter, 
Seller and Buyer shall have no further obligations to one another hereunder 
(other than the indemnifications contained in Section 7.(a)(iii), 8.(c), and 
21. hereof, which shall survive such termination).

     14.  THE CLOSING.  If the conditions referred to in Section 12. of this 
Agreement (the "Conditions Precedent to Buyer's Obligations") and Section 13. 
of this Agreement (the "Conditions Precedent to Sellers Obligations") have 
been satisfied or waived, the consummation of the transaction contemplated 
hereby ("Closing") shall take place in the offices of Seller, at 201 Main 
Street, Fort Worth, Texas 76102, on May 14, 1998, at 10:00 a.m. Central 
Standard Time, or at such other date and time (i) as the Buyer and Seller may 
agree or, (ii) to which Seller may postpone the Closing pursuant to Section 
8.(b) hereof (such date and time herein called the "Closing Date"). It is 
provided however, that Seller shall not be permitted to extend the Closing 
Date pursuant to Section 8(b) beyond July 14, 1998, unless Buyer consents.  
At the Closing:

          (a)  Seller shall:

               (i)  Execute, acknowledge, and deliver to Buyer a conveyance of
               the Properties (the "Assignment and Bill of Sale"), which shall
               include a warranty of title as against claims arising by through
               or under Seller, and not otherwise, and in the form attached
               hereto as Exhibit C (with Exhibits A and B attached thereto),
               effective as of seven o'clock a.m., (7:00 a.m.) Mountain Standard
               Time on June 1, 1998, (herein called the "Effective Date");

               (ii)  Execute (and, where required, acknowledge) and deliver to
               Buyer forms of conveyance or assignment as required by the
               applicable authorities for transfers of interests in state or
               federal leases included in the Properties;

               (iii)  Execute and deliver to Buyer letters in lieu of transfer
               orders (or similar documentation), in form acceptable to both
               parties;

               (iv)  If Buyer requests, deliver to Buyer an affidavit or other
               certification (as permitted by the Internal Revenue Code of 1986,
               as amended) that Seller is not a "foreign person" within the
               meaning of Section 1445 (or similar provisions) of such code
               (i.e., Seller is not a non-resident alien, foreign corporation,
               foreign partnership, foreign trust, or foreign estate, as those
               terms are defined in such code and regulations promulgated
               thereunder);

               (v)  With respect to Properties operated by Seller and to the
               extent available, deliver to Buyer all requisite consents of
               non-operators under any operating agreement naming Buyer as
               successor operator; and copies of such requests for consent which
               were sent but not obtained prior to Closing;

               (vi)  Deliver to Buyer resignations of operator and/or Changes of
               Operator/Owner Forms properly executed on behalf of Seller for
               all Seller-operated wells acquired by Buyer; and, any other forms
               required by governmental authorities having jurisdiction which
               must be initiated by Seller to change the operator from Seller to
               Buyer as of the Effective Date; and,

               (vii)  Certificates in form and substance satisfactory to Seller,
               effective as of the Closing Date and executed by Seller's duly
               authorized officer, partner, or owner, as appropriate, to the
               effect that (1) Seller has all requisite corporate, 

                                       14
<PAGE>

               partnership, or other power and authority to sell the 
               Properties on the terms of this Agreement and to perform its 
               other obligations under this Agreement and has fulfilled all 
               corporate, partnership, or other prerequisites to closing 
               this transaction, and (2) each individual executing the 
               closing documents has the authority to act on behalf of 
               Seller.

               (viii)  Deliver possession of the Properties to Buyer as of the
               Effective Date.

          (b)  Buyer shall:

               (i)  Deliver to Seller, by wire transfer to an account designated
               by Seller in a bank located in the United States, an amount
               payable in United States dollars equal to the amount as set forth
               on the Closing Settlement Statement as provided for in Section
               16.(c) below;

               (ii)  Deliver to Seller, except to the extent waived by Seller:

          (A)  Evidence of compliance with the requirements of all laws, rules,
          and regulations relating to the transfer of operatorship from Seller
          to Buyer;

          (B)  Evidence of Buyer's bond coverage as required by all laws, rules,
          and regulations, or that a cash deposit, certificate of deposit,
          letter of credit, or some other permitted financial security has been
          accepted by the proper regulatory agency for each well requiring such
          coverage;

          (C)  Evidence of compliance with the requirements of all laws, rules,
          and regulations that Buyer is qualified to succeed to Seller's
          interest in the Properties; and,

          (D)  Certificates in form and substance satisfactory to Seller,
          effective as of the Closing Date and executed by Buyer's duly
          authorized officer, partner, or owner, as appropriate, to the effect
          that (1) Buyer has all requisite corporate, partnership, or other
          power and authority to purchase the Properties on the terms of this
          Agreement and to perform its other obligations under this Agreement
          and has fulfilled all corporate, partnership, or other prerequisites
          to closing this transaction, and (2) each individual executing the
          closing documents has the authority to act on behalf of Buyer.

          (iii)  Execute such forms and take such other steps as Seller may
          reasonably require to (A) succeed Seller with respect to the
          Properties under the rules and regulations of applicable authorities
          and (B) assume any and all liabilities of Seller with respect to the
          wells described on Exhibit B; and,

          (iv)  Take possession of the Properties.

     15.  AFTER CLOSING.  Within thirty (30) days after Closing, Seller shall
make available for delivery to Buyer at Seller's offices all of Seller's lease
files, abstracts and title opinions, division order files, production records,
well files, copies of accounting records (but not including general financial
accounting or tax accounting records), and other similar files and records that
directly relate to the Properties.  Notwithstanding the foregoing, Seller shall
not be required to deliver to Buyer materials that Seller considers proprietary
or confidential or that Seller legally cannot provide to Buyer without
breaching, or risking a breach of, confidentiality agreements with other
parties.  It is expressly understood that Buyer is not entitled to acquire any
records except as expressly provided in Section 1. hereof.  Seller may retain
such files, or copies thereof, or such information as it deems necessary for all
purposes, including but not limited to, preparing a Final Settlement Statement
as provided in Section 16., or for purposes of filing tax returns covering the
Properties.  Any files or materials retained by Seller after Closing pursuant
hereto, shall be sent to Buyer as soon as reasonably practicable after final
payment is made in accordance with the Final 

                                       15
<PAGE>

Settlement Statement.  Seller may, at its own expense, have access to and 
make copies of all, or any part thereof, of the files and records provided 
Buyer hereunder at reasonable times and upon reasonable notice during regular 
business hours for as long as the Properties remain in effect.

As to those wells which Seller is disbursing proceeds of production, Seller 
shall continue to collect proceeds of production as long as it remains 
operator and shall be responsible for making disbursements, in accordance 
with its normal procedures (and at normal times), of such proceeds of 
production so collected to the parties entitled to same, with any proceeds of 
production thereafter collected by Seller to be forwarded promptly to its 
successor as operator.

Provided Buyer succeeds Seller as operator, Buyer shall become responsible 
for all disbursements of proceeds of production and such disbursement 
activities shall be included in the matters that Buyer assumes and with 
respect to which Buyer indemnifies Seller under Section 17 below.

SELLER GIVES NO ASSURANCE HEREUNDER THAT BUYER SHALL SUCCEED SELLER AS 
OPERATOR OF ANY PROPERTY WHERE PARTIES OTHER THAN SELLER OWN INTERESTS IN 
SUCH PROPERTY. It is understood that in most (if not all) of the operating 
agreements affecting the Properties, Seller does not have the right to 
transfer operations of the leasehold interests subject thereto to Buyer.  
However, Seller shall use its best efforts to secure consent from all 
non-operators naming Buyer as Operator under such operating agreements prior 
to Closing, to be effective on the Closing Date and provided Closing takes 
place. After Closing, Buyer shall use its best efforts to comply with the 
terms of any operating agreements to name a successor operator thereunder for 
which Seller was unable to obtain prior to Closing. Upon obtaining consent 
from non-operators naming Buyer as successor operator, Seller and Buyer 
promptly shall file all forms required by any governmental agency having 
authority, to change the operator from Seller to Buyer.

Seller shall operate the Seller-operated Properties until the Effective Date 
and thereafter, if necessary, until such time as provided under the 
applicable operating agreement, plan of unitization, or law requires.  As 
soon as practicable thereafter, operations shall be turned over to, and 
become the responsibility of, Seller's successor as Operator To the extent 
Seller so operates any Property after the Effective Date, its obligations to 
Buyer with respect to such operations shall be no greater than those that it 
would have to a non-operator under the applicable operating agreement.  In 
the absence of an operating agreement, those terms and provisions contained 
in the AAPL 610 (1382 Revision) form Operating Agreement shall apply.  THE 
PARTIES RECOGNIZE THAT, UNDER SUCH AGREEMENTS AND SUCH FORM OF AGREEMENT, THE 
OPERATOR IS NOT RESPONSIBLE TO THE OTHER PARTIES THERETO FOR ITS OWN 
NEGLIGENCE AND HAS NO RESPONSIBILITY TO SUCH OTHER PARTIES OTHER THAN FOR 
GROSS NEGLIGENCE OR WILLFUL MISCONDUCT.

As to all wells acquired by Buyer hereunder which Seller continues to operate 
on behalf of Buyer and for Buyer's account after the Effective Date because a 
successor operator has not been approved by the requisite governmental 
authority, or consent of non-operators has not been obtained, by mutual 
agreement or otherwise, Seller will be paid the producing well overhead rates 
shown in the operating agreement applicable to such wells and if there is no 
such established rate, Buyer shall pay Seller for its proportionate share 
thereof based upon the rate of five hundred dollars ($500.00) per month, or 
any part thereof, for each well.

     16.  CERTAIN ACCOUNTING ADJUSTMENTS TO THE PURCHASE PRICE.

          (a)  Appropriate adjustments to the Purchase Price shall be made
          between Buyer and Seller to reflect the following:

               (i)  All rights to proceeds, receipts, reimbursements, credits,
               and income attributable to the Properties and accruing before the
               Effective Time, as defined below, shall be the property of
               Seller.  All proceeds, receipts, credits, income, and charges
               attributable to the Properties acquired by Buyer hereunder and
               accruing on and after the Effective Time shall be the property 

                                       16
<PAGE>

               of Buyer.  As to Properties operated by Seller and purchased by
               Buyer hereunder and concerning accounts held in suspense, Seller
               will pay in full the royalty accounts that were suspended because
               the amount due is less than the statutory or contractual minimum
               for payment.  As to all other suspended accounts, if any, Seller
               shall transfer to its successor as operator all monies held in a
               suspended account which were received for production produced
               from or allocated to the Properties on and after the Effective
               Time.  As to proceeds received for production produced from or
               allocated to the Properties before the Effective Time and held in
               a suspense account at Buyer's option, Seller may either: 1)
               Retain the suspended amounts after Closing and, upon proof
               satisfactory to Seller, release the money to the proper party;
               or, 2) Transfer the suspended amounts to Buyer for future
               disbursement.  Once suspended amounts have been transferred to
               Buyer for future disbursement, Buyer agrees to be responsible for
               disbursing the suspended monies to the proper parties and shall
               release, indemnify, defend, and hold harmless the Seller Group
               from any and all claims, actions, causes of action, liabilities,
               damages, losses, costs, or expenses (including, without
               limitation, court costs and attorneys' fees), arising out of or
               in any way connected with making such disbursements, or failure
               to make a disbursement.

               (ii)  Seller shall be responsible for and pay (A) all charges and
               invoices for costs and expenses (including, without limitation,
               lease maintenance payments, drilling and operating expenses,
               capital expenditures, and overhead charges) accruing before the
               Effective Time and attributable to the Properties and (B)
               necessary royalty disbursements of proceeds realized from the
               sale of production produced from and allocated to the Properties
               before the Effective Time.  Buyer shall be responsible for
               payment of (C) all charges and invoices for costs and expenses
               (including, without limitation, lease maintenance payments,
               drilling and operating expenses, capital expenditures, and
               overhead charges) accruing on and after the Effective Time and
               attributable to the Properties acquired hereunder and (D)
               necessary royalty disbursements of proceeds realized from the
               sale of production produced from and allocated to the Properties
               acquired hereunder on and after the Effective Time.  All payments
               made by Seller for items under (C) above for which Buyer is
               responsible shall be reimbursed by Buyer.  Seller shall reimburse
               Buyer for all monies received by Seller from non-operators as
               payment of Seller's invoices for the operations of the wells
               described on Exhibit B for periods on and after the Effective
               Time.

               (iii)  Seller will be credited with an amount equal to the simple
               interest accrued on the Adjusted Purchase Price for the period
               beginning with the Closing Date and continuing through the
               Effective Date at seven percent (7%) simple annual interest
               calculated as follows:

                    INTEREST = Adjusted Purchase Price x number of days from 
                               closing to Effective Date x 7% divided by 365;

               The amount of interest credited to the Buyer will not exceed  
               $250,000.00 regardless of the above calculation, and further 
               such credit shall be only be applied if Closing occurs before 
               the Effective Date.

          (b)  In making such adjustments, the Parties agree that:

               (i) Seller will cause such oil storage facilities which store oil
               produced from the Properties to be gauged or strapped as of 7:00
               a.m. Mountain Standard Time on the Effective Date, herein also
               referred to as the Effective Time.  Seller also has caused the
               gas production meter charts (or if such do not exist, the sales
               meter charts) on the pipelines transporting gas production 

                                       17
<PAGE>

               from the Properties to be read as of the Effective Time. The 
               results of such gauging, strapping, or chart reading are 
               conclusive and shall be made available to Buyer.  The 
               production in such storage facilities or through such meters 
               on the gas pipelines as of the Effective Time shall be owned 
               by Seller; and, thereafter, production placed in such oil 
               storage facilities and gas production passing through the 
               aforesaid meters on the pipelines shall be owned by Buyer, 
               insofar as to the interests subject hereto as of Closing.
               
               (ii)  All ad valorem, severance, production and similar taxes
               applicable to the Properties shall be prorated between Seller and
               Buyer as of the Effective Date.  Therefore, all such taxes for
               1997 and prior years and for the portion of 1998 prior to the
               Effective Date levied against the Properties shall be borne and
               paid by Seller; and, all ad valorem and similar taxes for the
               remainder of 1998 and thereafter levied against the Properties
               shall be borne and paid by Buyer, irrespective if the amount
               levied is based on the previous year's production or any other
               basis.

               (iii)  Where Seller owns one-hundred percent (100%) of the
               working interest under a well and there is no overhead charge for
               determining the overhead expense to be charged to Buyer on and
               after the Effective Date, the overhead charge shall be deemed to
               be five hundred dollars ($500.00) per month, or any part thereof,
               per well.

               (iv)  Each party shall be responsible for its own income taxes.

          (c)  With respect to matters that can be determined as of Closing,
          Seller shall prepare, in accordance with the provisions of this
          Agreement and with generally accepted accounting principles, a
          statement (the "Closing Settlement Statement") setting forth each
          adjustment to the Base Purchase Price to the best of Seller's
          knowledge, whether upward or downward, as may be required in
          accordance herewith.  Seller shall submit to Buyer the Closing
          Settlement Statement no later than five (5) days prior to the Closing
          Date and shall afford Buyer access to Seller's records pertaining to
          the computation of the Closing Settlement Statement. Prior to the
          Closing, Buyer and Seller will agree upon the adjustments stated
          therein to be made to the Purchase Price, or will specify the
          adjustments to which there are differences and the adjustments to be
          omitted therefrom.  Only the agreed upon adjustments shall be taken
          into account in computing the adjustments to be made to the Purchase
          Price at Closing.  Final adjustments to the Purchase Price to be made
          hereunder shall be made within one hundred-twenty (120) days after the
          Closing Date for all matters other than Asserted Defects according to
          (d) hereinbelow as follows:

          (d)  As soon as practicable after the Closing, and in no event later
          than sixty (60) days following the Closing Date, Seller shall deliver
          to Buyer, in accordance with the provisions of this Agreement and with
          generally accepted accounting principles, a statement ("Final
          Settlement Statement") setting forth each adjustment under this
          Agreement which was not determined as of the Closing.  Within sixty
          (60) days after Buyer's receiving the Final Settlement Statement, the
          Parties shall agree upon the adjustments and payments stated in such
          Final Settlement Statement, and the net of such adjustments and
          payments shall be paid in cash to the appropriate Party by the other
          Party within five (5) days following agreement as to the Final
          Settlement Statement.  If the Parties fail to reach agreement as to
          all adjustment within said sixty (60) day period, the net amount of
          all undisputed adjustments shall be paid and any remaining disputed
          items shall be submitted for determination by a nationally recognized
          firm of public accountants selected by the parties, whose decision
          shall be final and binding.  The parties shall share equally the costs
          of such determination.

     17.  ASSUMPTION AND INDEMNIFICATION. UPON DELIVERY TO AND 

                                       18
<PAGE>

ACCEPTANCE BY BUYER OF THE ASSIGNMENT AND BILL OF SALE, BUYER SHALL BE DEEMED 
TO HAVE ASSUMED, TO PAY AND PERFORM TIMELY, ALL DUTIES, EXPENSES, 
OBLIGATIONS, LOSSES, HAZARDS AND LIABILITIES RELATING TO THE OWNERSHIP OR 
OPERATION OF THE PROPERTIES ARISING ON AND AFTER THE EFFECTIVE DATE 
(INCLUDING, WITHOUT LIMITATION, THOSE ARISING UNDER OR BY VIRTUE OF ANY 
LEASE, CONTRACT, AGREEMENTS, DOCUMENT, PERMIT OR RULE, OR DELAY IN OBTAINING 
APPROVAL OF FEDERAL OR STATE ASSIGNMENTS); AND, TO RELEASE, INDEMNIFY, 
DEFEND, AND HOLD HARMLESS THE SELLER GROUP FROM AND AGAINST ANY AND ALL 
CLAIMS, ACTIONS, LIABILITIES, LOSSES, DAMAGES, COSTS, OR EXPENSES (INCLUDING 
COURT COSTS AND ATTORNEYS' FEES) OF ANY KIND OR CHARACTER ARISING OUT OF OR 
OTHERWISE RELATING TO THE OWNERSHIP OR OPERATION OF THE PROPERTIES ON AND 
AFTER THE EFFECTIVE DATE. IN CONNECTION WITH (BUT NOT IN LIMITATION OF) THE 
FOREGOING, IT IS SPECIFICALLY UNDERSTOOD AND AGREED THAT MATTERS ARISING OUT 
OF OR OTHERWISE RELATING TO THE OWNERSHIP OR OPERATION OF THE PROPERTIES ON 
AND AFTER THE EFFECTIVE DATE SHALL BE DEEMED TO INCLUDE ALL MATTERS ARISING 
OUT OF THE STATUS AND THE CONDITION OF THE PROPERTIES ON THE EFFECTIVE DATE 
INCLUDING, WITHOUT LIMITATION, ALL OBLIGATIONS TO PROPERLY PLUG AND ABANDON 
WELLS LOCATED ON THE PROPERTIES, TO RESTORE THE SURFACE OF THE PROPERTIES TO 
AS NEAR ITS ORIGINAL CONDITION AS PRACTICABLE AND TO COMPLY WITH, OR BRING 
THE PROPERTIES INTO COMPLIANCE WITH, APPLICABLE ENVIRONMENTAL LAWS AND 
REGULATIONS, INCLUDING ALL LIABILITY AND EXPENSE FOR ANY RESTORATION, 
REMEDIATION, CLEAN-UP, DISPOSAL OF WASTE, OR REMOVAL THAT MAY BE INCURRED AS 
A RESULT OF THE EXISTENCE OR DISCOVERY OF NATURALLY OCCURRING RADIOACTIVE 
MATERIALS, OR OTHER HAZARDOUS OR DELETERIOUS SUBSTANCES IN, ON, UNDER OR 
ASSOCIATED WITH THE PROPERTIES, REGARDLESS OF WHEN THE EVENTS OCCURRED THAT 
GIVE RISE TO SUCH CONDITION, AND THE ABOVE PROVIDED FOR ASSUMPTIONS AND 
INDEMNIFICATIONS BY BUYER SHALL EXPRESSLY COVER AND INCLUDE SUCH MATTERS. THE 
FOREGOING ASSUMPTIONS AND INDEMNIFICATIONS SHALL APPLY WHETHER OR NOT SUCH 
DUTIES, OBLIGATIONS, OR LIABILITIES, OR SUCH CLAIMS, ACTIONS, CAUSES OF 
ACTION, LIABILITIES, DAMAGES, LOSSES, COSTS, OR EXPENSES ARISE OUT OF (i) 
NEGLIGENCE (INCLUDING SOLE NEGLIGENCE, SIMPLE NEGLIGENCE, CONCURRENT 
NEGLIGENCE, ACTIVE OR PASSIVE NEGLIGENCE, OR OTHERWISE, BUT EXPRESSLY NOT 
INCLUDING GROSS NEGLIGENCE OR WILLFUL MISCONDUCT) OF SELLER GROUP OR ANY 
OTHER INDEMNIFIED PARTY, OR (ii) STRICT LIABILITY.

     18.  ENVIRONMENTAL ASSESSMENT AND INDEMNIFICATION BY BUYER.  BUYER 
EXPRESSLY ACKNOWLEDGES THAT IT HAS MADE AN ENVIRONMENTAL ASSESSMENT OF THE 
PROPERTIES, OR WILL BE GIVEN THE OPPORTUNITY TO DO SO SUBJECT TO THE TERMS OF 
THIS AGREEMENT. BUYER HEREBY AGREES TO ASSUME THE RISKS THAT THE PROPERTIES 
MAY CONTAIN WASTE MATERIALS OR HAZARDOUS SUBSTANCES, AND THAT ADVERSE 
PHYSICAL CONDITIONS, INCLUDING BUT NOT LIMITED TO THE PRESENCE OF WASTE 
MATERIALS OR HAZARDOUS SUBSTANCES OR THE PRESENCE OF UNKNOWN ABANDONED OIL 
AND GAS WELLS, WATER WELLS, SUMPS AND PIPELINES, MAY EXIST IN, ON, OR UNDER 
THE PROPERTIES AS OF THE EFFECTIVE DATE, ALL RESPONSIBILITY AND LIABILITY 
RELATED TO ALL SUCH CONDITIONS, WHETHER KNOWN OR UNKNOWN, WILL BE TRANSFERRED 
FROM SELLER TO BUYER. BUYER ASSUMES FULL RESPONSIBILITY FOR, AND AGREES TO 
INDEMNIFY, HOLD HARMLESS AND DEFEND SELLER FROM AND AGAINST ALL LOSS, 
LIABILITY, CLAIMS, FINES, EXPENSES, COSTS (INCLUDING ATTORNEYS' FEES AND 
EXPENSES) AND CAUSES OF ACTION CAUSED BY OR ARISING OUT OF ANY FEDERAL, STATE 
OR LOCAL LAWS, RULES, ORDERS AND REGULATIONS 

                                       19
<PAGE>

APPLICABLE TO ANY NATURALLY OCCURRING RADIOACTIVE MATERIALS, WASTE MATERIAL 
OR HAZARDOUS SUBSTANCES ON OR ASSOCIATED WITH THE PROPERTIES OR THE PRESENCE, 
DISPOSAL, RELEASE OR THREATENED RELEASE OF ALL NATURALLY OCCURRING 
RADIOACTIVE MATERIALS, WASTE MATERIAL OR HAZARDOUS SUBSTANCES FROM THE 
PROPERTIES INTO THE ATMOSPHERE OR INTO OR UPON LAND OR ANY WATER COURSE OR 
BODY OF WATER, INCLUDING GROUND WATER, WHETHER OR NOT ATTRIBUTABLE TO 
SELLER'S ACTIVITIES OR THE ACTIVITIES OF THIRD PARTIES (REGARDLESS OF WHETHER 
OR NOT SELLER WAS OR IS AWARE OF SUCH ACTIVITIES) PRIOR TO, DURING OR AFTER 
THE PERIOD OF SELLER'S OWNERSHIP OF THE PROPERTIES. THIS INDEMNIFICATION AND 
ASSUMPTION SHALL ALSO APPLY TO LIABILITY FOR VOLUNTARY ENVIRONMENTAL RESPONSE 
ACTIONS UNDERTAKEN PURSUANT TO THE COMPREHENSIVE ENVIRONMENTAL RESPONSE 
COMPENSATION AND LIABILITY ACT (CERCLA) OR ANY OTHER FEDERAL, STATE OR LOCAL 
LAW.

     19.  DISCLAIMER OF WARRANTIES.  THE PROPERTIES SHALL BE CONVEYED 
PURSUANT HERETO WITHOUT ANY WARRANTY OR REPRESENTATION WHATSOEVER, WHETHER 
EXPRESS, IMPLIED OR STATUTORY AS TO, DESCRIPTION, QUANTITY, QUALITY, FITNESS 
FOR A PARTICULAR PURPOSE, CONFORMITY TO THE MODELS OR SAMPLES OF MATERIALS, 
OR MERCHANTABILITY OF ANY EQUIPMENT OR ITS FITNESS FOR ANY PURPOSE, OR 
OTHERWISE. BUYER SHALL HAVE INSPECTED, OR WAIVED (AND AS OF THE DEFECT NOTICE 
DATE SHALL BE DEEMED TO HAVE WAIVED) ITS RIGHT TO INSPECT, THE PROPERTIES FOR 
ALL PURPOSES AND SATISFIED ITSELF AS TO THEIR PHYSICAL AND ENVIRONMENTAL 
CONDITION, BOTH SURFACE AND SUBSURFACE, INCLUDING, BUT NOT LIMITED TO, 
CONDITIONS SPECIFICALLY RELATED TO THE PRESENCE, RELEASE, OR DISPOSAL OF 
HAZARDOUS SUBSTANCES, SOLID WASTES, ASBESTOS, OR OTHER MANMADE FIBERS OR 
NATURALLY OCCURRING RADIOACTIVE MATERIALS ("NORM") IN, ON, OR UNDER THE 
PROPERTIES.  BUYER IS RELYING SOLELY UPON ITS OWN INSPECTION OF THE 
PROPERTIES, AND BUYER SHALL, EXCEPT AS PROVIDED OTHERWISE HEREIN, ACCEPT ALL 
OF THE SAME "AS IS, WHERE IS".  WITHOUT LIMITATION OF THE FOREGOING, SELLER 
MAKES NO WARRANTY OR REPRESENTATION, EXPRESS, IMPLIED, STATUTORY, OR 
OTHERWISE, AS TO THE ACCURACY OR COMPLETENESS OF ANY DATA, REPORTS, RECORDS, 
PROJECTIONS, INFORMATION, OR MATERIALS NOW, HERETOFORE, OR HEREAFTER 
FURNISHED OR MADE AVAILABLE TO BUYER IN CONNECTION WITH THIS AGREEMENT, 
INCLUDING, WITHOUT LIMITATION, PRICING ASSUMPTIONS OR QUALITY OR QUANTITY OF 
HYDROCARBON RESERVES (IF ANY) ATTRIBUTABLE TO THE PROPERTIES OR THE ABILITY 
OR POTENTIAL OF THE PROPERTIES TO PRODUCE HYDROCARBONS OR THE ENVIRONMENTAL 
CONDITION OF THE  PROPERTIES OR ANY OTHER MATTERS CONTAINED IN THE 
PROPRIETARY DATA OR ANY OTHER MATERIALS FURNISHED OR MADE AVAILABLE TO BUYER 
BY SELLER OR BY SELLER'S AGENTS OR REPRESENTATIVES.  ANY AND ALL SUCH DATA, 
RECORDS, REPORTS, PROJECTIONS, INFORMATION, AND OTHER MATERIALS (WRITTEN OR 
ORAL) FURNISHED BY SELLER OR OTHERWISE MADE AVAILABLE OR DISCLOSED TO BUYER 
ARE PROVIDED TO BUYER AS A CONVENIENCE AND SHALL NOT CREATE NOR GIVE RISE TO 
ANY LIABILITY OF OR AGAINST SELLER, AND ANY RELIANCE ON OR USE OF THE SAME 
SHALL BE AT BUYER'S SOLE RISK TO THE MAXIMUM EXTENT PERMITTED BY LAW.

     20.  BUYER'S COVENANT NOT TO SUE SELLER GROUP.  Except to enforce the 
provisions of this Agreement or the responsibilities and liabilities of 
Seller for claims, costs and expenses with respect to the Properties prior to 
the Effective Date according to Section 17., Buyer covenants not to sue 
Seller Group with regard to any claim or liability relating to the 
Properties, or this transaction, regardless of when or how the claim or 
liability arose or arises or whether the claim or liability was 

                                       20
<PAGE>

foreseeable or unforeseeable.  BUYER'S COVENANT NOT TO SUE SELLER GROUP 
INCLUDES CLAIMS AND LIABILITIES RESULTING IN ANY WAY FROM THE NEGLIGENCE OR 
STRICT LIABILITY OF SELLER GROUP, WHETHER THE NEGLIGENCE OR STRICT LIABILITY 
IS ACTIVE, PASSIVE, JOINT, CONCURRENT OR SOLE.

     21.  COMMISSIONS.  Seller agrees to indemnify and hold harmless Buyer, 
its parent and subsidiary companies and other affiliates, and their 
directors, officers, employees, and agents from and against any and all 
claims, obligations, actions, liabilities, losses, damages, costs, or 
expenses (including court costs and attorneys' fees) of any kind or character 
arising out of or resulting from any agreement, arrangement, or understanding 
by, or on behalf of, Seller with any broker or finder in connection with this 
Agreement or the transaction contemplated hereby. Buyer agrees to indemnify 
and hold harmless Seller Group from and against any and all claims, 
obligations, actions, liabilities, losses, damages, costs, or expenses 
(including court costs and attorneys' fees) of any kind or character arising 
out of or resulting from any agreement, arrangement, or understanding by, or 
on behalf of, Buyer with any broker or finder in connection with this 
Agreement or the transaction contemplated hereby.

     22.  CASUALTY LOSS.  If the Properties are damaged by fire or other 
casualty prior to the Closing, this Agreement shall remain in full force and 
effect, and (unless Buyer and Seller shall otherwise agree) in such event as 
to each such damaged Property that Seller, in its sole discretion, elects not 
to repair, Buyer either may treat such Property as if it had an Asserted 
Defect or elect not to adjust the Purchase Price therefor.  If Buyer elects 
hereunder to treat the damaged Property as if it had an Asserted Defect, the 
procedure provided for in Section 11. shall apply to such Property, and all 
rights to insurance proceeds and claims against third parties related thereto 
shall belong to Seller.  If Buyer elects hereunder not to adjust the Purchase 
Price for such damaged Property, and if Seller is entitled to any claims 
under an insurance policy with respect to such damage, Seller shall either 
collect and pay over, or assign, such insurance claims to Buyer. Buyer shall 
then take title to such Property without reduction of the Purchase Price.  If 
Seller elects to repair a damaged Property, all rights to insurance proceeds 
and claims against third parties related thereto shall belong to Seller.

     23.  NOTICES.  All notices and other communications required or 
permitted under this Agreement shall be in writing, unless otherwise 
specifically provided herein, and shall be delivered by recognized commercial 
courier or delivery service (which provides a receipt), by facsimile (with 
receipt acknowledged), or by registered or certified mail (postage prepaid), 
at the following addresses:

     If to Buyer:   Continental Resources, Inc.
                    P.O. Box 1032
                    Enid, Oklahoma 73702
                    Attn: Land Manager
                    Fax No. (405) 548-5182

     If to Seller:  Bass Enterprises Production Co.
                    210 Main Street
                    Fort Worth, Texas 76102
                    Attn: W. Frank McCreight
                    Fax No. (817) 390-8893

All such notices and communications shall be considered delivered on the date 
of receipt. Buyer or Seller may specify as its proper address any other 
address within the continental United States by giving notice to the other 
party, in the manner provided in this Section.

     24.  SURVIVAL OF PROVISIONS.  All representations, warranties, and 
indemnifications made herein, except as to any warranty of title by Seller, 
shall survive the Closing and the delivery of the Assignment and Bill of 
Sale. All obligations hereunder not satisfied at Closing shall survive 
Closing and delivery of the Assignment and Bill of Sale to the extent the 
Parties intend for such 

                                       21
<PAGE>

obligations to be satisfied after Closing.  Buyer shall have until the Defect 
Notice Date in which to satisfy itself as! to the quantity and quality of 
Seller's title to the Properties.

     25.  MISCELLANEOUS MATTERS.

          (a)  FURTHER ASSURANCES.  After the Closing, Seller and Buyer shall
          execute and deliver, and shall otherwise cause to be executed and
          delivered, from time to time, such further instruments, notices,
          division orders, transfer orders, and other documents, and do such
          other and further acts and things as may be reasonably necessary more
          fully and effectively to grant, convey, and assign the Properties to
          Buyer.

          (b)  ASSIGNABILITY.  Except as provided below, neither party shall
          have the right to assign its rights under this Agreement without the
          prior written consent of the other party, and any such assignment in
          violation of this provision shall be void.

          (c)  GAS BALANCES.  Seller represents that there are no gas imbalances
          or make-up obligations affecting or relating to any of the properties.

          (d)  WAIVER AND REPRESENTATION:  TO THE EXTENT APPLICABLE TO THE
          TRANSACTION CONTEMPLATED HEREBY, OR ANY PORTION THEREOF, BUYER WAIVES
          THE PROVISIONS OF THE TEXAS DECEPTIVE TRADE PRACTICES ACT, CHAPTER 17,
          SUBCHAPTER E, SECTIONS 17.41 THROUGH 17.63, INCLUSIVE (OTHER THAN
          SECTION 17.555 WHICH IS NOT WAIVED), TEXAS BUSINESS AND COMMERCE CODE.
          In connection with such waiver, Buyer hereby represents and warrants
          to Seller that Buyer (a) is in the business of seeking or acquiring by
          purchase or lease, goods or services for commercial or business use,
          (b) has assets of Twenty Five Million Dollars ($25,000,000.00) or more
          according to its most recent financial statement, (c) has knowledge
          and experience in financial and business matters that enable it to
          evaluate the merits and risks of the transaction contemplated hereby,
          and (d) is not in a significantly disparate bargaining position.

          (e)  CONFIDENTIALITY AGREEMENT.  Until Closing, any Confidentiality
          Agreement executed by Buyer and Seller in connection with the
          transaction contemplated hereby remains in full force and effect and
          is not superseded or modified by this Agreement.

          (f)  PRIOR ENTIRE UNDERSTANDING/HEADINGS/GENDER.  This Agreement
          contains the entire understanding of the parties hereto with respect
          to the subject matter hereof and supersedes all prior agreements,
          understandings, negotiations, and discussions among the parties with
          respect to such subject matter, except as provided above with respect
          to any Confidentiality Agreement. The headings contained in this
          Agreement are for convenience only and shall not control or affect the
          meaning or construction of any provision of this Agreement.  Within
          this Agreement, words of any gender shall be held and construed to
          cover any other gender, and words in the singular shall be held and
          construed to cover the plural, unless the context otherwise requires. 
          Time is of the essence in this Agreement.

          (g)  AMENDMENTS.  This Agreement may be amended, modified,
          supplemented, restated, or discharged (and provisions hereof may be
          waived) only by an instrument executed by both Parties.

          (h)  ASSOCIATED EXPENSES.  Each party shall bear and pay all expenses
          it incurred and that are associated with the transaction contemplated
          by this Agreement.  Payment of recording fees, filing fees,
          documentary stamp taxes, all sales taxes (if any, plus penalty and
          interest) and any other fees and taxes imposed on the Properties on
          and after the Effective Date, excluding Seller's income taxes, shall
          be 

                                       22
<PAGE>

          paid by Buyer.

          (i)  SUCCESSORS AND ASSIGNS.  This Agreement shall be binding on the
          parties hereto and their respective heirs, successors,
          representatives, and assigns.

          (j)  COUNTERPARTS.  This Agreement may be executed in any number of
          counterparts, each of which shall be deemed an original, but all of
          which shall constitute one (1) and the same instrument.  It shall not
          be necessary for both parties to sign the same counterpart.

          (k)  ENFORCEABILITY.  WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF
          LAW, THIS AGREEMENT SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH
          AND GOVERNED BY THE LAWS OF THE STATE OF TEXAS APPLICABLE TO CONTRACTS
          MADE AND TO BE PERFORMED ENTIRELY WITHIN SUCH STATE AND BY THE LAWS OF
          THE UNITED STATES OF AMERICA, EXCEPT THAT, TO THE EXTENT THE LAW OF A
          STATE IN WHICH THE PROPERTIES ARE LOCATED NECESSARILY GOVERNS, THE LAW
          OF SUCH STATE SHALL, TO SUCH EXTENT, APPLY TO THE PROPERTIES.

          (l)  PUBLICITY.  Prior to Closing, Buyer shall not issue any publicity
          or press release concerning this Agreement or the transaction
          contemplated hereby without the prior written consent of Seller
          unless, in the written opinion of legal counsel acceptable to Seller,
          such disclosure is required by applicable law or other applicable
          rules or regulations of any governmental authority or stock exchange
          and such publicity or press release contains no more than the minimum
          information necessary to comply therewith.

          (m)  USE OF SELLER'S NAME.  Buyer agrees that, as soon as practicable
          after the Closing, it shall remove or cause to be removed the names
          and signs used by Seller, and all variations and derivatives thereof
          and logos relating thereto from the Properties and shall not
          thereafter make any use whatsoever of such names, signs, and logos. 
          After Closing and as to those Properties Buyer has taken over as
          operator, Seller reserves the right of access to confirm that Buyer
          has removed Seller's name, signs, and logos.  If Seller is forced to
          remove its name, signs, and logos because Buyer has failed to do so,
          Seller shall charge its costs to Buyer and Buyer shall pay Seller's
          invoice within fifteen (15) days of receipt.

          (n)  SEVERABILITY.  If any term or provision of this Agreement is
          determined to be invalid, illegal, or incapable of being enforced by
          any rule of law or public policy, all other conditions and provisions
          of this Agreement shall nevertheless remain in full force and effect
          so long as the economic or legal substance of the transactions
          contemplated hereby is not affected in any material fashion to either
          Buyer or Seller.  Upon such determination that any term or other
          provision is invalid, illegal, or incapable of being enforced, Buyer
          and Seller shall negotiate in good faith to modify this Agreement so
          as to effect the original intent of the Parties as closely as possible
          in an acceptable manner to the end that the transactions contemplated
          hereby are fulfilled to the extent possible.

          (o)  RESERVATION OF CLAIMS.  Seller reserves all rights to claims,
          demands, cause of action, and lawsuits concerning the Properties
          against third parties that accrued before the Effective Date, whether
          discovered before or after the Effective Date, excluding any rights or
          claims associated with gas imbalances.

          (p)  DUTY TO DEFEND.  Where a party ("indemnitor") has agreed to
          indemnify, defend, and hold the other party ("indemnitee") harmless
          under this Agreement the indemnitee, at its sole option if it is the
          sole defendant, may elect to (a) manage its 

                                       23
<PAGE>

          own defense, in which event the indemnitor will reimburse the 
          indemnitee for all attorney's fees, court, and other costs 
          reasonably incurred in defending a claim, upon delivery to the 
          indemnitor of invoices for such expenses; or (b) allow the 
          indemnitor to be responsible for all aspects of defense.  If both 
          parties are defendants in a claim, they shall reasonably endeavor 
          to arrange for joint defense to minimize defense costs, but 
          failure to reach such agreement shall in no event eliminate or 
          limit any indemnity obligations hereunder.

          (q)  EXHIBITS.  All exhibits referenced herein and attached hereto are
          by reference incorporated into this Agreement.

     IN WITNESS WHEREOF, this Agreement is executed by the parties hereto on the
date set forth above, but effective as of the Effective Date.

                              SELLERS

                              BASS ENTERPRISES PRODUCTION CO.


                              By:  /s/ W. FRANK MCCREIGHT
                                   -----------------------------------
                                       W. Frank McCreight
                                       Vice President

                              PERRY R. BASS, INC.,
                              SID R. BASS, INC.,
                              LEE M. BASS, INC.,
                              KEYSTONE, INC.,
                              THRU LINE INC.


                              By:  /s/ W. FRANK MCCREIGHT
                                   -----------------------------------
                                       W. Frank McCreight
                                       Vice President of all named corporations

                              GOLIAD PARTNERS, L.P.
                              By its Managing Partners
                              PRB-GP, Inc.
                              LMB-GP, Inc.
                              WPH-GP, Inc.


                              By:  /s/ W. FRANK MCCREIGHT
                                   -----------------------------------
                                       W. Frank McCreight
                                       Vice President of all named corporations

                              THE BASS MANAGEMENT TRUST


                              By:  /s/ PERRY R. BASS
                                   -----------------------------------
                                       Perry R. Bass, Trustee

                              SID R. BASS, MANAGEMENT TRUST


                              By:  /s/ SID R. BASS
                                   -----------------------------------
                                       Sid R. Bass, Trustee


                                       24
<PAGE>

                              By:  /s/ LEE M. BASS
                                   -----------------------------------
                                       Lee M. Bass

                              D W  GENPAR, INC.


                              By:  /s/ W. FRANK MCCREIGHT
                                   -----------------------------------
                                       W. Frank McCreight
                                       Vice President

                              W D. PARTNERS, L. P.
                              By DW Genpar, Inc., General Partner

                              By:  /s/ W. FRANK MCCREIGHT
                                   -----------------------------------
                                       W. Frank McCreight
                                       Vice President

                              WPH-GP, INC.


                              By:  /s/ W. FRANK MCCREIGHT
                                   -----------------------------------
                                          W. Frank McCreight
                                          Vice President

                              WORLAND ASSOCIATES, Texas General Partnership
                              By: Sid R. Bass, Inc. Managing Partner


                              By:  /s/ W. FRANK MCCREIGHT
                                   -----------------------------------
                                          W. Frank McCreight
                                          Vice President

                              WORLAND ASSOCIATES II
                              By: Sid R. Bass, Inc. Managing Partner


                              By:  /s/ W. FRANK MCCREIGHT
                                   -----------------------------------
                                          W. Frank McCreight
                                          Vice President

                              BUYER

                              CONTINENTAL RESOURCES, INC.


                              By:  /s/ HAROLD HAMM
                                   -----------------------------------
                                       Harold Hamm
                                       President


                                       25

<PAGE>


                                     EXHIBIT A
                  ASSIGNMENT AND BILL OF SALE DATED MAY 14, 1998
                              EFFECTIVE JUNE 1, 1998

<TABLE>
<CAPTION>
                                                                            EXHIBIT
<S>                                                                         <C>
UNITS

Cottonwood Creek Unit (48 pages) . . . . . . . . . . . . . . . . . . . . . . A-1
Cottonwood Creek Field Extension (Phosphoria) Unit (23 pages). . . . . . . . A-2
No Water Creek Unit (7 pages). . . . . . . . . . . . . . . . . . . . . . . . A-3
Slick Creek Unit (11 pages). . . . . . . . . . . . . . . . . . . . . . . . . A-4
South Frisby Unit (2 pages). . . . . . . . . . . . . . . . . . . . . . . . . A-5

NON-UNITIZED ASSETS

Producing - Big Horn County (1 page) . . . . . . . . . . . . . . . . . . . . A-6
Producing - Washakie County (26 pages) . . . . . . . . . . . . . . . . . . . A-7
Non-Producing - Big Horn County (1 page) . . . . . . . . . . . . . . . . . . A-8
Non-Producing - Washakie County (4 pages). . . . . . . . . . . . . . . . . . A-9

PROSPECTS

East Lamb Prospect (2 pages) . . . . . . . . . . . . . . . . . . . . . . . . A-10
Honeycomb Prospect (2 pages) . . . . . . . . . . . . . . . . . . . . . . . . A-11
Marconi Prospect (2 pages) . . . . . . . . . . . . . . . . . . . . . . . . . A-12
N. W. Zimmerman Prospect (1 page). . . . . . . . . . . . . . . . . . . . . . A-13
South Fork Prospect (4 pages). . . . . . . . . . . . . . . . . . . . . . . . A-14
Treasure Prospect (4 pages). . . . . . . . . . . . . . . . . . . . . . . . . A-15

EASEMENTS (2 pages). . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-16

</TABLE>


<PAGE>
                                                                    Page 1 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                          ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER     & PERCENTAGE
- ---------------------------------------------------------------------------------------
<S>  <C>                                  <C>       <C>                 <C>
       FEDERAL LANDS

2    TOWNSHIP 47 NORTH, RANGE 90 WEST                   USA W-01265         U.S.A.
     Section 7: Lots 7 and 8, E/2SW/4     158.56            HBP              All
                                                    Bass Lease 34696






4    TOWNSHIP 47 NORTH, RANGE 91 WEST                   USA W-03769         U.S.A.
     Section 1: SE/4NW/4                   40.00            HBU              All
                                                    Bass Lease 33483
     (SEE NOTE 1)





<CAPTION>
TRACT               LESSEE OF RECORD        OVERRIDING ROYALTY                WORKING INTEREST
 NO.                 & PERCENTAGE           & DECIMAL INTEREST                 & PERCENTAGE
- --------------------------------------------------------------------------------------------------------
<S>             <C>                       <C>                            <C>
2               Goliad Partners, L.P.     Rocky Mtn. Properties          Goliad Partners, L.P.
                            43.750000%                 .01000000                       43.750000%
                Sid R. Bass, Inc.         John T. Hoenshell              Sid R. Bass. Inc.
                            18.750000%                 .00500000                       18.750000%
                Keystone, Inc.            Alice Van Arsdale              Keystone, Inc.
                            18.750000%                 .00500000                       18.750000%
                Thru Line Inc.            Byron E. Van Arsdale, Jr.      Thru Line Inc.
                            18.750000%                 .00500000                       18.750000%
                            * * * * * *                * * * * * *                     * * * * * *
4               Amoco Production Company  Harris E. Kerisch              SURFACE TO BASE OF PHOSPHORIA
                           100.000000%                 .02500000         FORMATION:

                                                                         Perry R. Bass, Inc.
                                                                                       25.000000%
                                                                         Sid R. Bass, Inc.
                                                                                       18.750000%
                                                                         Lee M. Bass, Inc.
                                                                                       18.750000%
                                                                         Keystone, Inc.
                                                                                       18.750000%
                                                                         Thru Line Inc.
                                                                                       18.750000%
                                                                                       ---------

                                                                         BELOW BASE OF PHOSPHORIA
                                                                         FORMATION:

                                                                         Amoco Production Company
                                                                                       43.525000%
                                                                         Perry R. Bass, Inc.
                                                                                       14.118750%
</TABLE>

<PAGE>

                                                                    Page 2 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                        NO.
 NO.      DESCRIPTION OF LAND               ACRES       SERIAL NUMBER
- -------------------------------------------------------------------------
<S>    <C>                                  <C>       <C>
4        FEDERAL LANDS (cont'd)










5A     TOWNSHIP 47 NORTH, RANGE 91 WEST                   USA W-03995
       Section 15: NE/4, N/2SE/4            240.00            HBP
                                                      Bass Lease 33489
       (SEE NOTE 1)



















<CAPTION>
TRACT      ROYALTY OWNER      LESSEE OF RECORD            OVERRIDING ROYALTY          WORKING INTEREST
 NO.       & PERCENTAGE       & PERCENTAGE               & DECIMAL INTEREST            & PERCENTAGE
- -----------------------------------------------------------------------------------------------------------------
<S>        <C>             <C>                         <C>                            <C>
4                                                                                     Sid R. Bass, Inc.
                                                                                                    10.589063%
                                                                                      Lee M. Bass, Inc.
                                                                                                    10.589063%
                                                                                      Keystone, Inc.
                                                                                                    10.589062%
                                                                                      Thru Line Inc.
                                                                                                    10.589062%

5A          U.S.A          Amoco Production Company    Bruce Anderson                 SURFACE TO BASE OF PHOSPHORIA
             All                  100.000000%                       .01250000         FORMATION:
                                                       Doane College
                                                                    .01250000         Goliad Partners, L. P.
                                                                                                    31.250000%
                                                                                      Sid R. Bass, Inc.
                                                                                                    18.750000%
                                                                                      Keystone, Inc.
                                                                                                    18.750000%
                                                                                      Thru Line Inc.
                                                                                                    18.750000%
                                                                                      Perry R. Bass, Inc.
                                                                                                    12.500000%
                                                                                                    ----------

                                                                                      BELOW BASE OF PHOSPHORIA
                                                                                      FORMATION:

                                                                                      Amoco Production Company
                                                                                                    43.525000%
                                                                                      Goliad Partners, L. P.
                                                                                                    17.648437%
                                                                                      Sid R. Bass, Inc.
                                                                                                    10.589063%
</TABLE>

<PAGE>

                                                                    Page 3 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                      NO.
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER
- --------------------------------------------------------------------------
<S>  <C>                                  <C>        <C>
5A     FEDERAL LANDS (CONT'D)





5B   TOWNSHIP 47 NORTH, RANGE 91 WEST                  USA W-021765
     Section 15: S/2SE/4                   80.00            HBP
                                                     Bass Leases 33490
                                                         and 33950




<CAPTION>
TRACT          ROYALTY OWNER    LESSEE OF RECORD            OVERRIDING ROYALTY                WORKING INTEREST
 NO.           & PERCENTAGE       & PERCENTAGE              & DECIMAL INTEREST                 & PERCENTAGE
- ------------------------------------------------------------------------------------------------------------------------
<S>            <C>            <C>                          <C>                            <C>
5A                                                                                        Keystone, Inc.
                                                                                                        10.589062%
                                                                                          Thru Line Inc.
                                                                                                        10.589062%
                                                                                          Perry R. Bass, Inc.
                                                                                                         7.059375%
                                                                                                        * * * * * *

5B               U.S.A.       Amoco Production Company     Bruce Anderson                 SURFACE TO BASE OF PHOSPHORIA
                  All                     28.602900%                    .01250000         FORMATION:
                              Goliad Partners, L.P.        Mary Ann Ploehm
                                          31.236232%                    .00312500         Goliad Partners, L.P.
                              Sid R. Bass, Inc.            F. Joseph Vlock                              40.174638%
                                          13.386956%                    .00312500         Sid R. Bass, Inc.
                              Keystone, Inc.               John E. Vlock                                18.750000%
                                          13.386956%                    .00312500         Keystone, Inc.
                              Thru Line Inc.               Robert C. Vlock                              18.750000%
                                          13.386956%                    .00312500         Thru Line Inc.
                                                                                                        18.750000%
                                                                                          Perry R. Bass, Inc.
                                                                                                         3.575362%
                                                                                                         ---------

                                                                                          BELOW BASE OF PHOSPHORIA
                                                                                          FORMATION:

                                                                                          Goliad Partners, L.P.
                                                                                                        35.705435%
                                                                                          Sid R. Bass, Inc.
                                                                                                        16.068478%
                                                                                          Keystone, Inc.
                                                                                                        16.068478%
                                                                                          Thru Line Inc.
                                                                                                        16.068478%
</TABLE>


<PAGE>

                                                                    Page 4 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                      NO.                         ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER    & PERCENTAGE
- ---------------------------------------------------------------------------------------
<S>  <C>                                  <C>       <C>                <C>
       FEDERAL LANDS (CONT'D)






6    TOWNSHIP 47 NORTH, RANGE 91 WEST                   USA W-03996       U.S.A
     Section 11: E/2                      320.00            HBP            All
                                                    Bass Lease 33600








7    TOWNSHIP 47 NORTH, RANGE 90 WEST                   USA W-04079       U.S.A.
     Section 6: Lots 12 and 13, E/2SW/4   478.51            HBP            All
     Section 7: Lots 5 and 6, E/2NW/4,              Bass Lease 33471
                SE/4
     (SEE NOTE 1)






8    TOWNSHIP 48 NORTH, RANGE 91 WEST                   USA W-04081     U.S.A.
     Section 35: SW/4                     160.00            HBU          All
                                                    Bass Lease 33479
     (SEE NOTE 1)

<CAPTION>
TRACT              LESSEE OF RECORD             OVERRIDING ROYALTY                 WORKING INTEREST
 NO.                 & PERCENTAGE               & DECIMAL INTEREST                  & PERCENTAGE
- --------------------------------------------------------------------------------------------------------------
<S>              <C>                            <C>                            <C>
 5B                                                                             Amoco Production Company
                                                                                             14.301450%
                                                                               Perry R. Bass, Inc.
                                                                                              1.787681%
                                                                                             * * * * * *
6                Goliad Partners, L. P.         Bruce Anderson                 Goliad Partners, L.P.
                             31.250000%                      .01000000                       31.250000%
                 Sid R. Bass, Inc.                                             Sid R. Bass, Inc.
                             18.750000%                                                      18.750000%
                 Keystone, Inc.                                                Keystone, Inc.
                             18.750000%                                                      18.750000%
                 Thru Line Inc.                                                Thru Line Inc.
                             18.750000%                                                      18.750000%
                 Perry R. Bass, Inc.                                           Perry R. Bass, Inc.
                             12.500000%                                                      12.500000%
                             * * * * * *                                                     * * * * * *
7                Amoco Production Company       Elliott-Hall Company           Goliad Partners, L.P.
                            100.000000%                      .02500000                       31.250000%
                                                Elliott Industries             Sid R. Bass, Inc.
                                                             .02500000                       18.750000%
                                                                               Keystone, Inc.
                                                                                             18.750000%
                                                                               Thru Line Inc.
                                                                                             18.750000%
                                                                               Perry R. Bass, Inc.
                                                                                             12.500000%
                                                                                             * * * * * *

8                Amoco Production Company       Elliott-Hall Company           SURFACE TO BASE OF PHOSPHORIA
                            100.000000%                      .02500000         FORMATION:
                                                Elliott Industries
                                                             .02500000
</TABLE>

<PAGE>
                                                                    Page 5 of 48

                EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                                      REVISED EXHIBIT B
                                       JANUARY 1,1998
              ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
                       AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                                  WASHAKIE COUNTY, WYOMING
<TABLE>
<CAPTION>

TRACT                                      NO.                           ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER      & PERCENTAGE 
- --------------------------------------------------------------------------------------
<S>  <C>                                  <C>        <C>                 <C>

       FEDERAL LANDS (CONT'D)


9    TOWNSHIP 47 NORTH, RANGE 91 WEST                   USA W-04082          U.S.A.      
     Section 17: S/2SW/4                   80.00            HBP               All        
                                                     Bass Lease 33494                
     (SEE NOTE 1)                                                                   
                                                                                    





<CAPTION>



TRACT           LESSEE OF RECORD        OVERRIDING ROYALTY          WORKING INTEREST                 
 NO.            & PERCENTAGE           & DECIMAL INTEREST            & PERCENTAGE                    
- ------------------------------------------------------------------------------------------------------
<C>           <C>                    <C>                            <C>
                                                                                                     
                                                                                                     
                                                                                                     
                                                                    Perry R. Bass, Inc.              
                                                                                  25.000000%         
                                                                    Sid R. Bass, Inc.                
                                                                                  18.750000%         
                                                                    Lee M. Bass, Inc.                
                                                                                  18.750000%         
                                                                    Keystone, Inc.                   
                                                                                  18.750000%         
                                                                    Thru Line Inc.                   
                                                                                  18.750000%         
                                                                                  - - - - - -                   
                                                                    BELOW BASE OF PHOSPHORIA         
                                                                    FORMATION:                       
                                                                                                     
                                                                    Amoco Production Company         
                                                                                 43.525000%          
                                                                    Perry R. Bass, Inc.              
                                                                                  14.118750%         
                                                                    Sid R. Bass, Inc.                
                                                                                  10.589063%         
                                                                    Lee M. Bass, Inc.                
                                                                                  10.589063%         
                                                                    Keystone, Inc.                   
                                                                                  10.589062%         
                                                                    Thru Line Inc.                   
                                                                                  10.589062%         
                                                                                  * * * * * *       
9           Amoco Production Company Elliott-Hall Company           SURFACE TO BASE OF PHOSPHORIA    
                      100.000000%                 .02500000         FORMATION:                       
                                     Elliott Industries                                              
                                                  .02500000         Goliad Partners, L. P.           
                                                                                  31.250000%         


</TABLE>

<PAGE>
                                                                    Page 6 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>


TRACT                                      NO.                         ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER    & PERCENTAGE 
- ------------------------------------------------------------------------------------
<S>    <C>                              <C>           <C>              <C>
       FEDERAL LANDS (CONT'D)                                                       
                                                                                    
                                                                                    

10   TOWNSHIP 47 NORTH, RANGE 91 WEST                   USA W-04083     U.S.A.      
     Section 9: NE/4, N/2SE4            1,920.00            HBP          All        
     Section 10: All                                  Bass Lease 33487              
     Section 13: All                                                                
     Section 15: W/2                                                                
     Section 24: N/2NW14                                                            
     (SEE NOTE 1)                                                                   


<CAPTION>


TRACT          LESSEE OF RECORD        OVERRIDING ROYALTY          WORKING INTEREST                
 NO.           & PERCENTAGE           & DECIMAL INTEREST            & PERCENTAGE                   
- ---------------------------------------------------------------------------------------------------
<S>        <C>                       <C>                           <C>
                                                                   Sid R. Bass, Inc.               
                                                                                 18.750000%        
                                                                   Keystone, Inc.                   
                                                                                 18.750000%        
                                                                   Thru Line Inc.                  
                                                                                 18.750000%        
                                                                   Perry R. Bass, Inc.             
                                                                                 12.500000%        
                                                                                  - - - - - -                   
                                                                   BELOW BASE OF PHOSPHORIA        
                                                                   FORMATION:                      
                                                                                                   
                                                                   Amoco Production Company        
                                                                                43.525000%         
                                                                   Goliad Partners, L. P.          
                                                                                 17.648437%        
                                                                   Sid R. Bass, Inc.               
                                                                                 10.589063%        
                                                                   Keystone, Inc.                  
                                                                                 10.589062%        
                                                                   Thru Line Inc.                  
                                                                                 10.589062%        
                                                                   Perry R. Bass, Inc.             
                                                                                  7.059375%        
                                                                                  * * * * * *       
10         Amoco Production Company  Elliott-Hall Company          SURFACE TO BASE OF PHOSPHORIA   
                     100.000000%                 .02500000         FORMATION:                      
                                     Elliott Industries                                            
                                                 .02500000         Goliad Partners, L. P.          
                                                                                 31.250000%        
                                                                   Sid R. Bass, Inc.               
                                                                                 18.750000%        



</TABLE>

<PAGE>
                                                                    Page 7 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                         ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER    & PERCENTAGE 
- ------------------------------------------------------------------------------------
<S>  <C>                                  <C>        <C>               <C>          
       FEDERAL LANDS (CONT'D)                                                       
                                                                                    
                                                                                    

11   TOWNSHIP 47 NORTH, RANGE 91 WEST                   USA W-04084     U.S.A.      
     Section 1: Lots 7 and 8, SW/4NW/4,   2,515.13          HBP          All        
                SW/4                                    Bass Lease 33482            
     Section 2: Lots 5 and 6, S/2NE/4                                               
     Section 3: All                                                                 
     Section 4: All                                                                 
     Section 5: SW/4                                                                
     Section 12: All                                                                
     (SEE NOTE 1)                                                                   


<CAPTION>

TRACT           LESSEE OF RECORD        OVERRIDING ROYALTY          WORKING INTEREST                  
 NO.            & PERCENTAGE           & DECIMAL INTEREST            & PERCENTAGE                     
- ------------------------------------------------------------------------------------------------------
<S>         <C>                       <C>                           <C>
                                                                    Keystone, Inc.                    
                                                                                  18.750000%          
                                                                    Thru Line Inc.                    
                                                                                  18.750000%          
                                                                    Perry R. Bass, Inc.               
                                                                                  12.500000%          
                                                                                  - - - - - -                   
                                                                    BELOW BASE OF PHOSPHORIA          
                                                                    FORMATION:                        
                                                                    Amoco Production Company          
                                                                                  43.525000%          
                                                                    Goliad Partners, L.P.             
                                                                                  17.648437%          
                                                                    Sid R. Bass, Inc.                 
                                                                                  10.589063%          
                                                                    Keystone, Inc.                    
                                                                                  10.589062%          
                                                                    Thru Line Inc.                    
                                                                                  10.589062%          
                                                                    Perry R. Bass, Inc.               
                                                                                   7.059375%          
                                                                                  * * * * * *       
11          Amoco Production Company  Elliott-Hall Company          SURFACE TO BASE OF PHOSPHORIA     
                      100.000000%                 .02500000         FORMATION:                        
                                      Elliott Industries                                              
                                                  .02500000         Goliad Partners, L.P.             
                                                                                  31.250000%          
                                                                    Sid R. Bass, Inc.                 
                                                                                  18.750000%          
                                                                    Keystone, Inc.                    
                                                                                  18.750000%          

</TABLE>


<PAGE>
                                                                    Page 8 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                         ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER    & PERCENTAGE 
- ------------------------------------------------------------------------------------
<S>  <C>                                  <C>         <C>              <C>
       FEDERAL LANDS (CONT'D)                                                       
                                                                                    
                                                                                    
                                                                                    

12   TOWNSHIP 47 NORTH, RANGE 91 WEST     720.00        USA W-04085     U.S.A.      
     Section 21: N/2                                        HBP          All        
     Section 22: N/2                                  Bass Lease 33495              
     Section 24: N/2SW/4                                                            
                                                                                    
     (SEE NOTE 1)                                                                   
                                                                                    
                                                                                    
                                                                                    
                                                                                    
                                                                                    


<CAPTION>


TRACT            LESSEE OF RECORD        OVERRIDING ROYALTY          WORKING INTEREST                  
 NO.             & PERCENTAGE           & DECIMAL INTEREST            & PERCENTAGE                     
- ------------------------------------------------------------------------------------------------------
<C>          <C>                       <C>                           <C>
                                                                     Thru Line Inc.                    
                                                                                   18.750000%          
                                                                     Perry R. Bass, Inc.               
                                                                                   12.500000%          
                                                                                  - - - - - -                   
                                                                     BELOW BASE OF PHOSPHORIA          
                                                                     FORMATION:                        
                                                                                                       
                                                                     Amoco Production Company          
                                                                                   43.525000%          
                                                                     Goliad Partners, L.P              
                                                                                   17.648437%          
                                                                     Sid R. Bass, Inc.                 
                                                                                   10.589063%          
                                                                     Keystone, Inc.                    
                                                                                   10.589062%          
                                                                     Thru Line Inc.                    
                                                                                   10.589062%          
                                                                     Perry R. Bass, Inc.               
                                                                                    7.059375%          
                                                                                  * * * * * *       
12           Amoco Production Company  Elliott-Hall Company          SURFACE TO BASE OF PHOSPHORIA     
                       100.000000%                 .02500000         FORMATION:                        
                                       Elliott Industries                                              
                                                   .02500000         Goliad Partners, L.P.             
                                                                                   31.250000%          
                                                                     Sid R. Bass, Inc.                 
                                                                                   18.750000%          
                                                                     Keystone, Inc.                    
                                                                                   18.750000%          
                                                                     Thru Line Inc.                    
                                                                                   18.750000%          

</TABLE>

<PAGE>
                                                                    Page 9 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                         ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER    & PERCENTAGE 
- ------------------------------------------------------------------------------------
<S>  <C>                                <C>           <C>              <C>
       FEDERAL LANDS (CONT'D)
                                                                                    
                                                                                    
13   TOWNSHIP 47 NORTH, RANGE 91 WEST                   USA W-04086     U.S.A.      
     Section 7: SE/4                    1,600.00            HBP          All        
     Section 8: All                                   Bass Lease 33486              
     Section 9: NW/4, N/2SW/4,                                                      
                S/2S/2                                                              
     Section 17: NW/4, N/2SW/4, SE/4                                                
                                                                                    
     (SEE NOTE 1)                                                                   
                                                                                    
                                                                                    
                                                                                    


<CAPTION>


TRACT           LESSEE OF RECORD        OVERRIDING ROYALTY          WORKING INTEREST                  
 NO.            & PERCENTAGE           & DECIMAL INTEREST            & PERCENTAGE                     
- -------------------------------------------------------------------------------------------------------
<S>         <C>                       <C>                           <C>


                                                                    Perry R. Bass, Inc.               
                                                                                  12.500000%          
                                                                                  - - - - - -                   
                                                                    BELOW BASE OF PHOSPHORIA          
                                                                    FORMATION:                        
                                                                                                      
                                                                    Amoco Production Company          
                                                                                  43.525000%          
                                                                    Goliad Partners, L.P.             
                                                                                  17.648437%          
                                                                    Sid R. Bass, Inc.                 
                                                                                  10.589063%          
                                                                    Keystone, Inc.                    
                                                                                  10.589062%          
                                                                    Thru Line Inc.                    
                                                                                  10.589062%          
                                                                    Perry R. Bass, Inc.               
                                                                                   7.059375%          
                                                                                  * * * * * *       
13          Amoco Production Company  Elliott-Hall Company          SURFACE TO BASE OF PHOSPHORIA     
                      100.000000%                 .02500000         FORMATION:                        
                                      Elliott Industries                                            
                                                  .02500000         Goliad Partners, L.P.             
                                                                                  31.250000%          
                                                                    Sid R. Bass, Inc.                 
                                                                                  18.750000%          
                                                                    Keystone, Inc.                    
                                                                                  18.750000%          
                                                                    Thru Line Inc.                    
                                                                                  18.750000%          


</TABLE>

<PAGE>
                                                                   Page 10 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                       NO.                       ROYALTY OWNER
 NO.    DESCRIPTION OF LAND                ACRES       SERIAL NUMBER   & PERCENTAGE 
- -------------------------------------------------------------------------------------
<S>  <C>                                  <C>         <C>             <C>
       FEDERAL LANDS (CONT'D)                                                      
                                                                                   
                                                                                   
                                                                                   
16   TOWNSHIP 48 NORTH, RANGE 91 WEST                   USA W-04223     U.S.A.     
     Section 34: All                      720.00            HBU          All       
     Section 35: E/2SE/4                              Bass Lease 33478             
                                                                                   
     (SEE NOTE 1)                                                                  
                                                                                   


<CAPTION>


TRACT            LESSEE OF RECORD        OVERRIDING ROYALTY              WORKING INTEREST          
NO.               & PERCENTAGE           & DECIMAL INTEREST                 & PERCENTAGE           
- ---------------------------------------------------------------------------------------------------
<S>         <C>                       <C>                            <C>
                                                                     Perry R. Bass, Inc.           
                                                                                   12.500000%      
                                                                                    - - - - - -
                                                                     BELOW BASE OF PHOSPHORIA      
                                                                     FORMATION:                    
                                                                                                   
                                                                     Amoco Production Company      
                                                                                   43.525000%      
                                                                     Goliad Partners, L.P.         
                                                                                   17.648437%      
                                                                     Sid R. Bass, Inc.             
                                                                                   10.589063%      
                                                                     Keystone, Inc.                
                                                                                   10.589062%      
                                                                     Thru Line Inc.                
                                                                                   10.589062%      
                                                                     Perry R. Bass, Inc.           
                                                                                    7.059375%      
                                                                                    * * * * * *
16          Amoco Production Company  Bill Tomberline                SURFACE TO BASE OF PHOSPHORIA 
                       100.000000%                  .0125000         FORMATION:                    
                                      Jane Tomberline                                              
                                                    .0125000         Perry R. Bass, Inc.           
                                                                                   25.000000%      
                                                                     Sid R. Bass, Inc.             
                                                                                   18.750000%      
                                                                     Lee M. Bass, Inc.             
                                                                                   18.750000%      
                                                                     Keystone, Inc.                
                                                                                   18.750000%      
                                                                     Thru Line Inc.                
                                                                                   18.750000%      
                                                                                    - - - - - -

</TABLE>


<PAGE>
                                                                   Page 11 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                            NO.                         ROYALTY OWNER
 NO.    DESCRIPTION OF LAND                     ACRES       SERIAL NUMBER    & PERCENTAGE 
- --------------------------------------------------------------------------------------------
<S>  <C>                                        <C>         <C>              <C>

       FEDERAL LANDS (CONT'D)

                                                                                          

21   TOWNSHIP 47 NORTH, RANGE 90 WEST                          USA W-04643     U.S.A.     
     Section 18: All                            1,114.16            HBP          All      
     Section 19: Lots 5, 6, and 7, E/2NW/4,                  Bass Lease 33506             
                 NE/4SW4, NE/4, N/2SE/4                                                   
                                                                                          
     (SEE NOTE 1)                                                                         
                                                                                          
                                                                                          


<CAPTION>


TRACT            LESSEE OF RECORD        OVERRIDING ROYALTY            WORKING INTEREST        
 NO.             & PERCENTAGE           & DECIMAL INTEREST              & PERCENTAGE           
- -----------------------------------------------------------------------------------------------
<S>         <C>                        <C>                            <C>
                                                                                               
                                                                      BELOW BASE OF PHOSPHORIA 
                                                                      FORMATION:               
                                                                      Amoco Production Company 
                                                                                    43.525000% 
                                                                      Perry R. Bass, Inc.      
                                                                                    14.118750% 
                                                                      Sid R. Bass, Inc.        
                                                                                    10.589063% 
                                                                      Lee M. Bass, Inc.        
                                                                                    10.589063% 
                                                                      Keystone, Inc.            
                                                                                    10.589062% 
                                                                      Thru Line Inc.           
                                                                                    10.589062% 
                                                                                    * * * * * *
21          Amoco Production Company   Rocky Mtn. Properties          SURFACE TO BASE OF PHOSPHORIA
                        100.000000%                 .01000000         FORMATION:               
                                       Charles Byrd McLean                                     
                                                    .00400000         Goliad Partners, L.P.    
                                       Neil Thomas McLean                           31.250000% 
                                                    .00400000         Sid R. Bass, Inc.        
                                       Anthony Charles McLean                       18.750000% 
                                                    .00200000         Keystone, Inc.           
                                       Linda G. Austin                              18.750000% 
                                                    .00125000         Thru Line Inc.           
                                       Andrew E. Gitlitz:                           18.750000% 
                                                    .00125000         Perry R. Bass, Inc.      
                                                                                    12.500000% 
                                                                                    - - - - - -

</TABLE>


<PAGE>
                                                                   Page 12 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                        ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER   & PERCENTAGE 
- ------------------------------------------------------------------------------------
<S>  <C>                                  <C>       <C>               <C>
       FEDERAL LANDS (CONT'D)                                                      
                                                                                   
                                                                                   
25   TOWNSHIP 48 NORTH, RANGE 91 WEST                   USA W-05378     U.S.A.     
     Section 29: W/2SE/4, SW/4            240.00            HBP          All       
                                                    Bass Lease 33296               
     (SEE NOTE 1)                                                                  
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
28   TOWNSHIP 48 NORTH, RANGE 91 WEST                   USA W-05406     U.S.A.     
     Section 28: W/2SW/4                  160.00            HBP          All       
     Section 29: E/2SE/4                            Bass Lease 33297               
                                                                                   
     (SEE NOTE 1)                                                                  
                                                                                   

<CAPTION>

TRACT           LESSEE OF RECORD        OVERRIDING ROYALTY          WORKING INTEREST         
 NO.            & PERCENTAGE           & DECIMAL INTEREST            & PERCENTAGE            
- ---------------------------------------------------------------------------------------------
<S>        <C>                       <C>                            <C>
                                     Pearl F. Lagos                 BELOW BASE OF PHOSPHORIA 
                                                  .00083333         FORMATION:               
                                     Jerry W. Housel                                         
                                                  .00041667         Amoco Production Company 
                                                                                  43.525000% 
                                                                    Goliad Partners, L.P.    
                                                                                  17.648437% 
                                                                    Sid R. Bass, Inc.        
                                                                                  10.589063% 
                                                                    Keystone, Inc.           
                                                                                  10.589062% 
                                                                    Thru Line Inc.           
                                                                                  10.589062% 
                                                                    Perry R. Bass, Inc.      
                                                                                   7.059375% 
                                                                                 * * * * * *
25         Goliad Partners, L. P.    Elizabeth C. Burroughs         Goliad Partners, L.P.    
                       31.250000%                 .00750000                       31.250000% 
           Sid R. Bass, Inc.         Ruth E. Gammill                Sid R. Bass, Inc.        
                       18.750000%                 .00750000                       18.750000% 
           Keystone, Inc.            Rolland G. Gautsche            Keystone, Inc.           
                       18.750000%                 .00750000                       18.750000% 
           Thru Line Inc.            A. M. Culver Company           Thru Line Inc.           
                       18.750000%                 .00375000                       18.750000% 
           Perry R. Bass, Inc.       Clive & Ruth J. Stoelk         Perry R. Bass, Inc.      
                       12.500000%                 .00375000                       12.500000% 
                       * * * * * *              * * * * * *                       * * * * * *
28         Goliad Partners, L. P.    Elizabeth C. Burroughs         Goliad Partners, L.P.    
                       31.250000%                 .03000000                       31.250000% 
           Sid R. Bass, Inc.                                        Sid R. Bass, Inc.        
                       18.750000%                                                 18.750000% 
           Keystone, Inc.                                           Keystone, Inc.           
                       18.750000%                                                 18.750000% 

</TABLE>

<PAGE>
                                                                   Page 13 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                        ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER   & PERCENTAGE 
- -----------------------------------------------------------------------------------
<S>  <C>                                <C>           <C>             <C>
       FEDERAL LANDS (CONT'D)


30   TOWNSHIP 48 NORTH, RANGE 91 WEST                   USA W-05449     U.S.A.     
     Section 28: NE/4SW/4                  40.00            HBU          All       
                                                      Bass Lease 33298             
     (SEE NOTE 1)                                                                  
                                                                                   
                                                                                   

32   TOWNSHIP 48 NORTH, RANGE 91 WEST                   USA W-05472     U.S.A.     
     Section 28: SE/4, SE/4SW/4         1,960.00            HBP          All       
     Section 30: SE/4                                 Bass Lease 33477
     Section 31: E/2                                                               
     Section 32: All                                                               
     Section 33: All                                                               
                                                                                   
     (SEE NOTE 1)                                                                  
                                                                                   

<CAPTION>

TRACT            LESSEE OF RECORD        OVERRIDING ROYALTY          WORKING INTEREST                
 NO.             & PERCENTAGE           & DECIMAL INTEREST            & PERCENTAGE                   
- -----------------------------------------------------------------------------------------------------
<S>         <C>                       <C>                            <C>
                                                                                                     
            Thru Line Inc.                                           Thru Line Inc.                  
                        18.750000%                                                 18.750000%        
            Perry R. Bass, Inc.                                      Perry R. Bass, Inc.             
                        12.500000%                                                 12.500000%        
                       * * * * * *                                                 * * * * * *
30          Perry R. Bass, Inc.       Meyer Koscove                  Perry R. Bass, Inc.             
                        25.000000%                 .02500000                       25.000000%        
            Sid R. Bass, Inc.         Joseph E. Pepper               Sid R. Bass, Inc.               
                        18.750000%                 .02500000                       18.750000%        
            Lee M. Bass, Inc.                                        Lee M. Bass, Inc.               
                        18.750000%                                                 18.750000%        
            Keystone, Inc.                                           Keystone, Inc.                  
                        18.750000%                                                 18.750000%        
            Thru Line Inc.                                           Thru Line Inc.                  
                        18.750000%                                                 18.750000%        
                       * * * * * *                                                 * * * * * *
                                                                                                     
32          Amoco Production Company                 None            SURFACE TO BASE OF PHOSPHORIA   
                       100.000000%                                   FORMATION:                      
                                                                                                     
                                                                     Goliad Partners, L.P.           
                                                                                   31.250000%        
                                                                     Sid R. Bass, Inc.               
                                                                                   18.750000%        
                                                                     Keystone, Inc.                  
                                                                                   18.750000%        
                                                                     Thru Line Inc.                  
                                                                                   18.750000%        
                                                                     Perry R. Bass, Inc.             
                                                                                   12.500000%        

</TABLE>


<PAGE>
                                                                   Page 14 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING


<TABLE>
<CAPTION>

TRACT                                      NO.                         ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER    & PERCENTAGE 
- ------------------------------------------------------------------------------------
<S>  <C>                                 <C>         <C>               <C>
       FEDERAL LANDS (CONT'D)

                                                                                    

33   TOWNSHIP 47 NORTH, RANGE 91 WEST                   USA W-05491     U.S.A.      
     Section  1: Lots 5 and 6, S/2NE/4,  1,119.14           HBP          All        
                 SE/4                                Bass Lease 33481
     Section 23: N/2, N/2S/2                                                        
     Section 24: NE/4, N/2SE/4, S/2NW/4                                             
                                                                                    
                                                                                    
     (SEE NOTE 1)                                                                   
                                                                                    


<CAPTION>


TRACT          LESSEE OF RECORD        OVERRIDING ROYALTY          WORKING INTEREST                  
 NO.           & PERCENTAGE           & DECIMAL INTEREST            & PERCENTAGE                     
- --------------------------------------------------------------------------------------------------
<S>        <C>                        <C>                          <C>
                                                                                                     
                                                                   BELOW BASE OF PHOSPHORIA          
                                                                   FORMATION:                        
                                                                   Amoco Production Company          
                                                                                43.525000%           
                                                                   Goliad Partners, L.P.             
                                                                                 17.648437%          
                                                                   Sid R. Bass, Inc.                 
                                                                                 10.589063%          
                                                                   Keystone, Inc.                    
                                                                                 10.589062%          
                                                                   Thru Line Inc.                    
                                                                                 10.589062%          
                                                                   Perry R. Bass, Inc.               
                                                                                  7.059375%          
                                                                                * * * * * *
33         Amoco Production Company         None                   SURFACE TO BASE OF PHOSPHORIA     
                     100.000000%                                   FORMATION:                        
                                                                                                     
                                                                   Goliad Partners, L.P.             
                                                                                 31.250000%          
                                                                   Sid R. Bass, Inc.                 
                                                                                 18.750000%          
                                                                   Keystone, Inc.                    
                                                                                 18.750000%          
                                                                   Thru Line Inc.                    
                                                                                 18.750000%          
                                                                   Perry R. Bass, Inc.               
                                                                                 12.500000%          
                                                                                  - - - - - -
                                                                   BELOW BASE OF PHOSPHORIA          
                                                                   FORMATION:                        



</TABLE>

<PAGE>

                                                                   Page 15 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                           ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER      & PERCENTAGE 
- --------------------------------------------------------------------------------------
<S>  <C>                                  <C>        <C>                 <C>

       FEDERAL LANDS (CONT'D)

34   TOWNSHIP 47 NORTH, RANGE 91 WEST                      Buffalo        U.S.A.
     Section 17: NE/4                     160.00          039524-A          All
                                                            HBP
                                                      Bass Lease 34083

37   TOWNSHIP 47 NORTH, RANGE 91 WEST                    USA WA-44460     U.S.A.
     Section 6: Lots 8 and 9, S/2NE/4,    477.29            HBP             All
                SE/4
     Section 7: NE/4

     (Noncommitted acreage within Unit)



<CAPTION>

TRACT           LESSEE OF RECORD             OVERRIDING ROYALTY          WORKING INTEREST                 
 NO.            & PERCENTAGE                & DECIMAL INTEREST            & PERCENTAGE                    
- ------------------------------------------------------------------------------------------------------
<S>             <C>                         <C>                          <C>
                                                                          Amoco Production Company
                                                                                        43.525000%
                                                                          Goliad Partners, L.P.   
                                                                                        17.648437% 
                                                                          Sid R. Bass, Inc.       
                                                                                        10.589063% 
                                                                          Keystone, Inc.           
                                                                                        10.589062% 
                                                                          Thru Line Inc.           
                                                                                        10.589062%
                                                                          Perry R. Bass, Inc.     
                                                                                         7.059375%
                                                                                         * * * * * *
34              Goliad Partners, L. P.     The Hawks Company              Goliad Partners, L.P.    
                         43.750000%                 .01000000                           43.750000% 
                Sid R. Bass, Inc.          K & B Company                  Sid R. Bass, Inc.        
                         18.750000%                 .00500000                           18.750000% 
                Keystone, Inc.             Marjorie J. Schrantz           Keystone, Inc.           
                         18.750000%                 .00500000                           18.750000% 
                Thru Line Inc.             Wheatley Oil Company           Thru Line Inc.           
                         18.750000%                 .00500000                           18.750000% 
                         * * * * * *                * * * * *                             * * * * * *
37              ANR Production Company                 None               SURFACE TO 10,590 FEET:  
                        100.000000%                                                                       
                                                                          ANR Production Company   
                                                                                        50.000000% 
                                                                          Hanson Oil Corporation   
                                                                                        37.500000% 
                                                                          International Technology 
                                                                          Resources Petroleum, Inc.
                                                                                        10.000000%

</TABLE>


<PAGE>

                                                                   Page 16 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                           ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER      & PERCENTAGE 
- --------------------------------------------------------------------------------------
<S>  <C>                                  <C>        <C>                 <C>

       FEDERAL LANDS (CONT'D)

38   TOWNSHIP 47 NORTH, RANGE 91 WEST                    Buffalo           U.S.A.
     Section 2:  Lots 7 and 8, SW/4,     1,195.05         041711            All
                 W/2SE/4, S/2NW/4                          HBP
     Section 5:  Lots 5, 6, 7, and 8,                 Bass Lease 33485
                 S/2N/2, SE/4
     Section 11: W/2                                                               
                                                                                   
     (SEE NOTE 1)                                                                  
    



<CAPTION>

TRACT           LESSEE OF RECORD             OVERRIDING ROYALTY          WORKING INTEREST                 
 NO.            & PERCENTAGE                & DECIMAL INTEREST            & PERCENTAGE                    
- ------------------------------------------------------------------------------------------------------
<S>             <C>                         <C>                          <C>
                                                                         Damson 1977-78 Natural   
                                                                                  Gas Income Fund 
                                                                                  Series 1978-1 .66% 
                                                                                  Series 1978-2 .66% 
                                                                                  Series 1978-3 .66% 
                                                                         Damson Oil Corporation .52%
                                                                                      -----------
                                                                         BELOW 10,590 FEET:      
 
                                                                         ANR Production Company   
                                                                                 100.000000% 
                                                                                      ***********


38              Amoco Production Company    Betty H. Clark              SURFACE TO BASE OF PHOSPHORIA 
                          100.000000%                    .00325000      FORMATION:                    
                                            A. Joyce McDade Trust,                                       
                                            A. Joyce Biggs McDade,      Goliad Partners, L.P.         
                                            Trustee      .00187500                    31.250000%      
                                            Dent N. Hand                Sid R. Bass, Inc.             
                                                         .00125000                    18.750000%      
                                            Margaret E. Mefford,        Keystone, Inc.                
                                            Living Trust .00125000                    18.750000%      
                                            Sisk Enterprises            Thru Line Inc.                
                                                         .00125000                    18.750000%      
                                            Sylvan K. Burt              Perry R. Bass, Inc.           
                                                         .00083340                    12.500000%      
                                            Eunice L. Shishkowsky                    -----------                 
                                                         .00083340      BELOW BASE OF PHOSPHORIA      
                                            David S. Burt               FORMATION:                    
                                                         .00083330                                    
                                            Harold G. Burt              Amoco Production Company      
                                                         .00083330                    43.525000%      
                                            Lee C. Burt                 Goliad Partners, L.P.         
                                                         .00083330                    17.648437%


</TABLE>

<PAGE>

                                                                   Page 17 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                           ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER      & PERCENTAGE 
- --------------------------------------------------------------------------------------
<S>  <C>                                  <C>        <C>                 <C>

       FEDERAL LANDS (CONT'D)

39     TOWNSHIP 47 NORTH, RANGE 91 WEST                     Buffalo             U.S.A.     
       Section 14: All                      640.00           041712              All       
                                                              HBP                    
       (SEE NOTE 1)                                     Bass Lease 33488               
                                                                                   
                                                                                   


<CAPTION>

TRACT           LESSEE OF RECORD             OVERRIDING ROYALTY          WORKING INTEREST                 
 NO.            & PERCENTAGE                & DECIMAL INTEREST            & PERCENTAGE                    
- ------------------------------------------------------------------------------------------------------
<S>             <C>                         <C>                          <C>

                                             Holly S. Gleave                Sid R. Bass, Inc.             
                                                          .00062500                       10.589063%      
                                             Alan T. Heavens                Keystone, Inc.                
                                                          .00062500                       10.589062%      
                                             Melva C. Nelson                Thru Line Inc.                
                                                          .00062500                       10.589062%      
                                             Mark C. Regan                  Perry R. Bass, Inc.           
                                                          .00062500                        7.059375%      
                                             Robert Brighton Schick                                       
                                                          .00062500                                       
                                             R. W. Slemaker                                               
                                                          .00062500                                       
                                             L. D. Chilton                                                
                                                          .00041670                                       
                                             Clyde D. Graeber                                             
                                                          .00020830                                       
                                             Roger Dell Graeber                                           
                                                          .00020830                                       
                                                          * * * * * *
39                Amoco Production Company  Betty H. Clark                 SURFACE TO BASE OF PHOSPHORIA 
                              100.000000%                 .00325000        FORMATION:               
                                            UMC Petroleum Corp.                                     
                                                          .00300000                                  
                                            A. Joyce Biggs McDade          Goliad Partners, L.P.             
                                            Trustee, A. Joyce McDade                     31.250000% 
                                            Trust         .00125000        Sid R. Bass, Inc.        
                                            R. A. Campbell                               18.750000% 
                                                          .00125000        Keystone, Inc.           
                                            Dent N. Hand                                 18.750000% 
                                                          .00125000        Thru Line Inc.           
                                            Melva C. Nelson                              18.750000% 
                                                          .00125000                                  

</TABLE>



<PAGE>

                                                                   Page 18 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                           ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER      & PERCENTAGE 
- --------------------------------------------------------------------------------------
<S>  <C>                                  <C>        <C>                 <C>

       FEDERAL LANDS (CONT'D)

                                                                                      
                                                                                      
                                                                                      
                                                                                      

<CAPTION>

TRACT           LESSEE OF RECORD             OVERRIDING ROYALTY          WORKING INTEREST                 
 NO.            & PERCENTAGE                & DECIMAL INTEREST            & PERCENTAGE                    
- ------------------------------------------------------------------------------------------------------
<S>             <C>                         <C>                          <C>
                                                                                         
                                              Ruth C. Warren, Trustee,       Perry R. Bass. Inc.                
                                              Warren Family Trust                          12.500000%           
                                                           .00125000                        ----------
                                              Sylvan K. Burt                 BELOW BASE OF PHOSPHORIA           
                                                           .00083340         FORMATION:                         
                                              Eunice L. Shishkowsky                                             
                                                           .00083340         Amoco Production Company           
                                              David S. Burt                                43.525000%           
                                                           .00083330         Goliad Partners, L.P.              
                                              Harold Q. Burt                               17.648437%           
                                                           .00083330         Sid R. Bass, Inc.                  
                                              Lee C. Burt                                  10.589063%           
                                                           .00083330         Keystone. Inc.                     
                                              Alan T. Heavens                              10.589062%           
                                                           .00062500         Thru Line Inc.                     
                                              Holly S. Gleave                              10.589062%           
                                                           .00062500         Perry R. Bass, Inc.                
                                              Mark C. Regan                                 7.059375%           
                                                           .00062500                                            
                                              Robert Brighton Schick                                            
                                                           .00062500     
                                              R. W. Slemaker                                                                   
                                                           .00062500                                                           
                                              L.D. Chilton                                                                     
                                                           .00041670                                                           
                                              Clyde D. Graeber                                                                 
                                                           .00020830                                                           
                                              Roger Dell Graeber                                                               
                                                           .00020830                                                           
</TABLE>



<PAGE>

                                                                   Page 19 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                           ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER      & PERCENTAGE 
- --------------------------------------------------------------------------------------
<S>  <C>                                  <C>        <C>                 <C>

       FEDERAL LANDS (CONT'D)


40   TOWNSHIP 47 NORTH, RANGE 91 WEST                      Buffalo          U.S.A.        
     Section 2: E/2SE/4                    80.00           042332            All          
                                                             HBP
     (SEE NOTE 1)                                      Bass Lease 33484                  





<CAPTION>

TRACT           LESSEE OF RECORD             OVERRIDING ROYALTY          WORKING INTEREST                 
 NO.            & PERCENTAGE                & DECIMAL INTEREST            & PERCENTAGE                    
- ------------------------------------------------------------------------------------------------------
<S>             <C>                         <C>                          <C>

40              Amoco Production Company     Lyle Wostenberg                SURFACE TO BASE OF PHOSPHORIA            
                         100.000000%                      .03000000         FORMATION:                               
                                                                                                     
                                                                            Goliad Partners, L.P.                          
                                                                                          31.250000%                       
                                                                            Sid R. Bass, Inc.                              
                                                                                          18.750000%                       
                                                                            Keystone, Inc.                                 
                                                                                          18.750000%                       
                                                                            Thru Line Inc.                                 
                                                                                          18.750000%                       
                                                                            Perry R. Bass, Inc.                            
                                                                                          12.500000%                       
                                                                                            ------
                                                                            BELOW BASE OF PHOSPHORIA                       
                                                                            FORMATION:

                                                                            Amoco Production Company                       
                                                                                          43.525000%                       
                                                                            Goliad Partners, L.P.                          
                                                                                          17.648437%                       
                                                                            Sid R. Bass, Inc.                              
                                                                                          10.589063%                       
                                                                            Keystone, Inc.                                 
                                                                                          10.589062%                       
                                                                            Thru Line Inc.                                 
                                                                                          10.589062%                       
                                                                            Perry R. Bass, Inc.                            
                                                                                           7.059375%                       

</TABLE>


<PAGE>
                                                                   Page 20 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                           ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER      & PERCENTAGE 
- --------------------------------------------------------------------------------------
<S>  <C>                                  <C>        <C>                 <C>

       FEDERAL LANDS (CONT'D)

42   TOWNSHIP 48 NORTH, RANGE 91 WEST                   USA W-105377         U.S.A.          
     Section 35: W/2SE/4                   80.00       (08/01/97) HBU          All           
                                                      Bass Lease 33480






<CAPTION>

TRACT LESSEE OF RECORD             OVERRIDING ROYALTY               WORKING INTEREST                 
 NO.   & PERCENTAGE                & DECIMAL INTEREST                & PERCENTAGE                    
- -------------------------------------------------------------------------------------------
<S>   <C>                         <C>                             <C>
42    Amoco Production Company     D L M Partners                 SURFACE TO BASE OF PHOSPHORIA       
               100.000000%                   .04000000            FORMATION:  
                                                                                      
                                                                  Perry R. Bass, Inc.                        
                                                                                25.000000%                   
                                                                  Sid R. Bass, Inc.                          
                                                                                18.750000%                   
                                                                  Lee M. Bass, Inc.                          
                                                                                18.750000%                   
                                                                  Keystone, Inc.                              
                                                                                18.750000%                   
                                                                  Thru Line Inc.                             
                                                                                18.750000%                   
                                                                                 ------           
                                                                  BELOW BASE OF PHOSPHORIA                   
                                                                  FORMATION:                                 
                                                                                      
                                                                  Amoco Production Company                   
                                                                                50.000000%                    
                                                                  Perry R. Bass, Inc.                        
                                                                                12.500000%                   
                                                                  Sid R. Bass, Inc.                          
                                                                                 9.375000%                   
                                                                  Lee M. Bass, Inc.                          
                                                                                 9.375000%                   
                                                                  Keystone, Inc.                             
                                                                                 9.375000% 
                                                                  Thru Line Inc.                             
                                                                                9.3750000%                   
      
</TABLE>


<PAGE>
                                                                   Page 21 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                           ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER      & PERCENTAGE 
- --------------------------------------------------------------------------------------
<S>  <C>                                  <C>        <C>                 <C>

       FEDERAL LANDS (CONT'D)

47   TOWNSHIP 47 NORTH, RANGE 91 WEST                     USA W-05673        U.S.A        
     Section 23: SE/4SW/4                  40.00              HBP             All
                                                       Bass Lease 33496                 
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     




<CAPTION>

TRACT LESSEE OF RECORD             OVERRIDING ROYALTY                  WORKING INTEREST                 
 NO.   & PERCENTAGE                & DECIMAL INTEREST                     & PERCENTAGE                    
- -------------------------------------------------------------------------------------------
<S>  <C>                         <C>                                <C>
47    Amoco Production Company       Dale Arthur Clay               SURFACE TO BASE OF PHOSPHORIA
                100.000000%                       .00750000         FORMATION:              
                                     Shirley S. Sawyer, Trustee 
                                     Shirley S. Sawyer Revocable    Goliad Partners, L.P. 
                                     Trust      .00750000                         31.250000%  
                                     Bitterroot Public Library      Sid R. Bass, Inc.         
                                                  .00500000                       18.750000%  
                                     Marianne Clay Barnes           Keystone, Inc.            
                                                  .00500000                       18.750000%  
                                     Julianne Kline                 Thru Line Inc.            
                                                  .00500000                       18.750000%  
                                     Carolyn Sue Clay               Perry R. Bass, Inc.       
                                                  .00333334                       12.500000%  
                                     Lawrence John Clay                             -------
                                                  .00333333         BELOW BASE OF PHOSPHORIA  
                                     Rosalind Grace McCluskey       FORMATION:                
                                                  .00333333                                   
                                     Verna Charlotte Clay, Trustee, Amoco Production Company  
                                     Clay Trust dated 11/25/87                    50.000000%  
                                                  .00250000         Goliad Partners, L.P.     
                                     Bruce W. Crawford                            15.625000%  
                                                  .00250000         Sid R. Bass, Inc.         
                                     Catherine A. Crawford                         9.375000%  
                                                  .00250000         Keystone, Inc.            
                                     Alison Crawford Stone                         9.375000% 
                                                  .00250000         Thru Line Inc.            
                                                                                   9.375000%  
                                                                    Perry R. Bass, Inc.       
                                                                                   6.250000%  

</TABLE>

<PAGE>
                                                                   Page 22 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                           ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER      & PERCENTAGE 
- --------------------------------------------------------------------------------------
<S>  <C>                                  <C>        <C>                 <C>

       FEDERAL LANDS (CONT'D)

48   TOWNSHIP 47 NORTH, RANGE 91 WEST                      USA W-05674        U.S.A.        
     Section 24: SE/4SE/4                  40.00               HBP             All          
                                                       Bass Lease 33497                  




<CAPTION>

TRACT LESSEE OF RECORD             OVERRIDING ROYALTY              WORKING INTEREST                 
 NO.   & PERCENTAGE                & DECIMAL INTEREST                & PERCENTAGE                    
- -------------------------------------------------------------------------------------------
<S>  <C>                         <C>                            <C>
48     Amoco Production Company  Dale Arthur Clay               SURFACE TO BASE OF PHOSPHORIA
                  100.000000%                 .00750000         FORMATION:     
                                 Shirley S. Sawyer, Trustee 
                                 Shirley S. Sawyer Revocable    Goliad Partners, L.P.     
                                 Trust      .00750000                         31.250000%  
                                 Bitterroot Public Library      Sid R. Bass, Inc.         
                                              .00500000                       18.750000%  
                                 Marianne Clay Barnes           Keystone, Inc.            
                                              .00500000                       18.750000%  
                                 Julianne Kline                 Thru Line Inc.            
                                              .00500000                       18.750000%  
                                 Carolyn Sue Clay               Perry R. Bass, Inc.       
                                              .00333334                       12.500000%  
                                 Lawrence John Clay                            -------- 
                                              .00333333         BELOW BASE OF PHOSPHORIA  
                                 Rosalind Grace McCluskey       FORMATION:                
                                              .00333333                                   
                                 Verna Charlotte Clay, Trustee, Amoco Production Company  
                                 Clay Trust dated 11/25/87                    50.000000%  
                                              .00250000         Goliad Partners, L.P.     
                                 Bruce W. Crawford                            15.625000%  
                                              .00250000         Sid R. Bass, Inc.         
                                 Catherine A. Crawford                         9.375000% 
                                              .00250000         Keystone, Inc.            
                                 Alison Crawford Stone                         9.375000% 
                                              .00250000         Thru Line Inc.            
                                                                               9.375000%  
                                                                Perry R. Bass, Inc.       
                                                                               6.250000% 
</TABLE>

<PAGE>
                                                                   Page 23 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                           ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER      & PERCENTAGE 
- --------------------------------------------------------------------------------------
<S>  <C>                                  <C>        <C>                 <C>

       FEDERAL LANDS (CONT'D)

49   TOWNSHIP 47 NORTH, RANGE 91 WEST                     USA W-05675        U.S.A.       
     Section 24: SW/4SE/4                  40.00              HBP             All         
                                                        Bass Lease 33498                 
                                                                                     


<CAPTION>

TRACT LESSEE OF RECORD             OVERRIDING ROYALTY                 WORKING INTEREST                 
 NO.   & PERCENTAGE                & DECIMAL INTEREST                   & PERCENTAGE                    
- -------------------------------------------------------------------------------------------------
<S>  <C>                        <C>                                 <C>
49    Amoco Production Company  Dale Arthur Clay                    SURFACE TO BASE OF PHOSPHORIA          
                 100.000000%                 .00750000              FORMATION:                
                                Shirley S. Sawyer, Trustee                                    
                                Shirley S. Sawyer Revocable         Goliad Partners, L.P.     
                                Trust      .00750000                              31.250000%  
                                Bitterroot Public Library           Sid R. Bass, Inc.         
                                             .00500000                            18.750000%  
                                Marianne Clay Barnes                Keystone, Inc.            
                                             .00500000                            18.750000%  
                                Julianne Kline                      Thru Line Inc.            
                                             .00500000                            18.750000%  
                                Carolyn Sue Clay                    Perry R. Bass, Inc.       
                                             .00333334                            12.500000%  
                                Lawrence John Clay                                  -------
                                             .00333333              BELOW BASE OF PHOSPHORIA  
                                Rosalind Grace McCluskey            FORMATION:                
                                             .00333333                                        
                                Verna Charlotte Clay, Trustee,      Amoco Production Company  
                                Clay Trust dated 11/25/87                         50.000000%  
                                             .00250000              Goliad Partners, L.P.     
                                Bruce W. Crawford                                 15.625000%  
                                             .00250000              Sid R. Bass, Inc.         
                                Catherine A. Crawford                              9.375000%  
                                             .00250000              Keystone, Inc.            
                                Alison Crawford Stone                              9.375000%  
                                             .00250000              Thru Line Inc.            
                                                                                   9.375000%  
                                                                    Perry R. Bass, Inc.       
                                                                                   6.250000% 

</TABLE>
<PAGE>
                                                                   Page 24 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                           ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER      & PERCENTAGE 
- --------------------------------------------------------------------------------------
<S>  <C>                                  <C>        <C>                 <C>

       FEDERAL LANDS (CONT'D)

50   TOWNSHIP 47 NORTH, RANGE 90 WEST                USA W-021053-A     U.S.A.       
     Section 19: Lot 8, SE/4SW/4,         159.20            HBU          All         
     S/2SE/4                                        Bass Lease 33507                 
                                                                                     





<CAPTION>

TRACT LESSEE OF RECORD             OVERRIDING ROYALTY                 WORKING INTEREST                 
 NO.   & PERCENTAGE                & DECIMAL INTEREST                   & PERCENTAGE                    
- -------------------------------------------------------------------------------------------------
<S>  <C>                          <C>                            <C>
50    Amoco Production Company    Neil A. McLean                 SURFACE TO BASE OF PHOSPHORIA      
                   100.000000%                 .01000000         FORMATION:               
                                  Rocky Mtn. Properties                                   
                                               .01000000         Perry R. Bass, Inc.      
                                  Linda G. Austin                              25.000000% 
                                               .00125000         Sid R. Bass, Inc.        
                                  Andrew E. Gitlitz                            18.750000% 
                                               .00125000         Lee M. Bass, Inc.        
                                  Leta Higgins                                 18.750000% 
                                               .00125000         Keystone, Inc.           
                                  Pearl F. Lagos                               18.750000% 
                                               .00083333         Thru Line Inc.           
                                  Jerry W. Housel                              18.750000% 
                                               .00041667                         ------
                                                                 BELOW BASE OF PHOSPHORIA 
                                                                 FORMATION:               
                                                                                          
                                                                 Amoco Production Company 
                                                                              50.000000%  
                                                                 Perry R. Bass, Inc.      
                                                                               12.500000% 
                                                                 Sid R. Bass, Inc.        
                                                                                9.375000% 
                                                                 Lee M. Bass, Inc.        
                                                                                9.375000% 
                                                                 Keystone, Inc.           
                                                                                9.375000% 
                                                                 Thru Line Inc.           
                                                                                9.375000% 
</TABLE>
<PAGE>
                                                                   Page 25 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                           ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER      & PERCENTAGE 
- --------------------------------------------------------------------------------------
<S>  <C>                                  <C>        <C>                 <C>

       FEDERAL LANDS (CONT'D)

51   TOWNSHIP 47 NORTH, RANGE 91 WEST                 USA W-021466        U.S.A.       
     Section 23: S/2SE/4                   80.00            HBP             All        
                                                                                       
                                                                                       
51A  TOWNSHIP 47 NORTH, RANGE 91 WEST                 USA W-021466        U.S.A.       
     Section 21: SE/4                     160.00            HBP             All        
                                                                                       
                                                                                       
52   TOWNSHIP 47 NORTH, RANGE 91 WEST                 USA W-021468        U.S.A.       
     Section 24: S/2SW/4                   80.00            HBP             All        
                                                                                       
                                                                                       
52A  TOWNSHIP 47 NORTH, RANGE 91 WEST                 USA W-021468        U.S.A.       
     Section 22: 5/2                      480.00            HBP             All        
     Section 25: NE/4                                                                  
                                                                                       
52B  TOWNSHIP 47 NORTH, RANGE 91 WEST                 USA W-021468        U.S.A.       
     Section 25: NW/4                     160.00            HBP             All        
                                                                                       
                                                                                       
53   TOWNSHIP 47 NORTH, RANGE 91 WEST      40.00      USA W-021469        U.S.A.       
     Section 23: SW/4SW/4                                   HBP             All        
                                                                                       
                                                                                       
<CAPTION>

TRACT       LESSEE OF RECORD              OVERRIDING ROYALTY            WORKING INTEREST                 
 NO.          & PERCENTAGE                & DECIMAL INTEREST              & PERCENTAGE                    
- -------------------------------------------------------------------------------------------
<S>      <C>                             <C>                         <C>
     
51        Elliott-Hall Company                 None                  Elliott-Hall Company     
                      50.000000%                                                 50.000000% 
          Elliott Industries                                         Elliott Industries       
                      50.000000%                                                 50.000000% 
                                                                                         
51A       Elliott-Hall Company                 None                  Elliott-Hall Company     
                      50.000000%                                                 50.000000% 
          Elliott Industries                                         Elliott Industries       
                      50.000000%                                                 50.000000% 
                                                                                            
52        Elliott-Hall Company                 None                  Elliott-Hall Company     
                      50.000000%                                                 50.000000% 
          Elliott Industries                                         Elliott Industries       
                      50.000000%                                                 50.000000% 
                                                                                            
52A       Elliott-Hall Company                 None                  Elliott-Hall Company     
                      50.000000%                                                 50.000000% 
          Elliott Industries                                         Elliott Industries       
                      50.000000%                                                 50.000000% 
                                                                                            
52B       Elliott-Hall Company                 None                  Elliott-Hall Company     
                      50.000000%                                                 50.000000% 
          Elliott Industries                                         Elliott Industries       
                      50.000000%                                                 50.000000% 
                                                                                       
53        Elliott-Hall Company                 None                  Elliott-Hall Company     
                      50.000000%                                                 50.000000% 
          Elliott Industries                                         Elliott Industries       
                      50.000000%                                                 50.000000% 

</TABLE>
<PAGE>
                                                                   Page 26 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                           ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER      & PERCENTAGE 
- --------------------------------------------------------------------------------------
<S>  <C>                                  <C>        <C>                 <C>

       FEDERAL LANDS (CONT'D)

53A  TOWNSHIP 47 NORTH, RANGE 91 WEST     320.00      USA W-021469         U.S.A.        
     Section 26: NW/4                                       HBP              All         
     Section 27: NW/4                                                                    
                                                                                         
53B  TOWNSHIP 47 NORTH, RANGE 91 WEST     320.00      USA W-021469         U.S.A.        
     Section 26: NE/4                                       HBP              All         
     Section 27: NE/4                                                                    
                                                                                         
54   TOWNSHIP 47 NORTH, RANGE 90 WEST     160.00       USA W-03731-B       U.S.A.        
     Section 7: NE/4                                        HBP              All         
                                                     Bass Lease 33472                    

<CAPTION>

TRACT   LESSEE OF RECORD          OVERRIDING ROYALTY              WORKING INTEREST                 
 NO.     & PERCENTAGE             & DECIMAL INTEREST                & PERCENTAGE                    
- --------------------------------------------------------------------------------------------
<S>  <C>                       <C>                            <C>
     
53A  Elliott-Hall Company      None                           Elliott-Hall Company    
                 50.000000%                                                 50.000000%
     Elliott Industries                                       Elliott Industries      
                 50.000000%                                                 50.000000%
     
53B  Elliott-Hall Company      None                           Elliott-Hall Company    
                 50.000000%                                                 50.000000%
     Elliott Industries                                       Elliott Industries      
                 50.000000%                                                 50.000000%
                    ******                                                     ******
54   Amoco Production Company  Marvel Lowrance                Goliad Partners, L. P.  
                100.000000%                 .01333330                       31.250000%
                               Louis J. Baker & Gloria C.     Sid R. Bass, Inc.       
                                            .00250000                       18.750000%
                               Floyd D. Gorrell & Dorothy E.  Keystone, Inc.          
                                            .00222220                       18.750000%
                               Thomas Miller McKinney Est     Thru Line Inc.          
                               Trust, Priscilla Ann Dunnum,                 18.750000%
                               Trustee      .00222220         Perry R. Bass, Inc.     
                               Jeanne H. O'Mahoney                          12.500000%
                                            .00222220      
                               P. L. Bacheller             
                                            .00071430      
                               William A. Bayerd           
                                            .00071430            
                               Emily Curtiss Huntington    
                                            .00071430      
                               Richard Huntington & Ethel  
                                            .00071430      
                               Genevieve Ruble             
                                            .00071430      
     
</TABLE>

<PAGE>
                                                                   Page 27 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                           ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER      & PERCENTAGE 
- --------------------------------------------------------------------------------------
<S>  <C>                                  <C>        <C>                 <C>

       FEDERAL LANDS (CONT'D)








55   TOWNSHIP 47 NORTH, RANGE 90 WEST                   USA W-03731-C          U.S.A.       
     Section 8: S/2NW/4                    80.00            HBP                All        
                                                       Bass Leases 33476              
     (SEE NOTE 2)                                         and 33948                  
                                                                                    

<CAPTION>

TRACT  LESSEE OF RECORD               OVERRIDING ROYALTY          WORKING INTEREST                 
 NO.    & PERCENTAGE                  & DECIMAL INTEREST            & PERCENTAGE                    
- --------------------------------------------------------------------------------------------
<S>    <C>                          <C>                         <C>
                                     
                                     Buford W. Olson, Jr.        
                                                  .00035720      
                                     Jane E. Bangert             
                                                  .00017860      
                                     Fred Huntington             
                                                  .00017860      
                                     Joan Markovich              
                                                  .00017860      
                                     Judith A. Metzger           
                                                  .00017860      
                                     Demores Susan Furtwangler   
                                                  .00011900      
                                     Buford Willard Olson, III   
                                                  .00011900      
                                     Douglas H. Olson            
                                                  .00011900      
                                             *******
55      Goliad Partners, L. P.       Marvel Lowrance                PER DONLEY DRILLING UNIT AS TO  
                    43.750000%                    .02000000         PHOSPHORIA FORMATION ONLY:      
        Sid R. Bass, Inc.            Floyd D. Gorrell & Dorothy E.                                  
                    18.750000%                    .00333333         Goliad Partners, L. P.          
        Keystone, Inc.               Thomas Miller McKinney Est                   33.116250%        
                    18.750000%       Trust  .00333333               Sid R. Bass, Inc.               
        Thru Line Inc.               Jeanne H. O'Mahoney                          18.750000%        
                    18.750000%                    .00333333         Keystone, Inc.                  
                                     Louis J. Baker & Gloria C.                   18.750000%        
                                                  .00250000         Thru Line Inc.                  
                                     P. L. Bacheller                              18.750000%        
                                                  .00071428         Perry R. Bass, Inc.             
                                     William A. Bayerd                            10.633750%        
                                                  .00071428                         ********
                                     Emily Curtiss Huntington       REMAINING ZONES:                
                                                  .00071428                                         

</TABLE>
<PAGE>
                                                                   Page 28 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                           ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER      & PERCENTAGE 
- --------------------------------------------------------------------------------------
<S>  <C>                                  <C>        <C>                 <C>

       FEDERAL LANDS (CONT'D)












56   TOWNSHIP 47 NORTH, RANGE 90 WEST                     USA W-04643-A        U.S.A.        
     Section 9: S/2SE/4                    80.00              HBP               All 
                                                       Bass Leases 33504,                
                                                        33764, 34008, and               
                                                             38846                     

<CAPTION>

TRACT   LESSEE OF RECORD          OVERRIDING ROYALTY            WORKING INTEREST                 
 NO.      & PERCENTAGE            & DECIMAL INTEREST              & PERCENTAGE                    
- -------------------------------------------------------------------------------------------
<S>    <C>                     <C>                            <C>

                               Richard Huntington & Ethel     Goliad Partners, L. P.   
                                            .00071428                       43.750000%
                               Genevieve Ruble                Sid R. Bass, Inc.       
                                            .00071428                       18.750000%
                               Buford W. Olson, Jr.           Keystone, Inc.          
                                            .00035714                       18.750000%
                               Jane E. Bangert                Thru Line Inc.          
                                            .00017857                       18.750000%
                               Fred Huntington                                        
                                            .00017857                                 
                               Joan Markovich                                         
                                            .00017857                                 
                               Judith A. Metzger                                      
                                            .00017857                                 
                               Demores Susan Furtwangler                              
                                            .00011904                                 
                               Buford Willard Olson, III                              
                                            .00011904                                 
                               Douglas H. Olson                                       
                                            .00011904                                 
                                              ****** 
56  Goliad Partners, L. P.     Rocky Mtn. Properties           SURFACE TO BASE OF PHOSPHORIA         
                25.781250%                  .01500000          FORMATION:                            
    RES Oil & Gas Ltd.         Trilon Oil Company, Inc.                                               
                12.500000%                  .01250000          Goliad Partners, L. P.                
    Tricon Oil Co., Inc.       James Dawson Hancock, Jr. &                    30.468750%              
                12.500000%     Margaret Fox Hancock,           Sid R. Bass, Inc. 
    VLS Oil & Gas Ltd.         Trustees, the Hanco Trust                      14.062500%              
                12.500000%                  .00694480          Keystone, Inc.                        
    Sid R. Bass, Inc.          Charles Byrd McLean                            14.062500%              
                11.718750%                  .00400000          Thru Line Inc.                        
    Keystone, Inc.             Neil Thomas McLean                             14.062500%              
                11.718750%                  .00400000                                            


</TABLE>
<PAGE>
                                                                   Page 29 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                           ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER      & PERCENTAGE 
- --------------------------------------------------------------------------------------
<S>  <C>                                  <C>        <C>                 <C>

       FEDERAL LANDS (CONT'D)




















<CAPTION>

TRACT  LESSEE OF RECORD             OVERRIDING ROYALTY            WORKING INTEREST                 
 NO.   & PERCENTAGE                 & DECIMAL INTEREST              & PERCENTAGE                    
- -------------------------------------------------------------------------------------------
<S>   <C>                       <C>                           <C>

      Thru Line Inc.            John L. and Mary Kathryne      RES Oil & Gas Ltd.      
                  11.718750%    Hancock, Trustees, JLH Minroy                12.500000%
      Perry R. Bass, Inc.       Trust        .00277770         VLS Oil & Gas Ltd.      
                   1.562500%    Emile Guidroz                                12.500000%
                                             .00208330         Perry P. Bass, Inc.     
                                Virginia Nelle Rouer                          2.343750%
                                             .00208330                        *********
                                Anthony Charles McLean         BELOW BASE OF PHOSPHORIA
                                             .00200000         FORMATION:              
                                Carol L. Collins Zachau                                
                                             .00156260         Goliad Partners, L. P.  
                                Anne Luckett Fisher                          29.492188%
                                             .00156250         Sid R. Bass, Inc.       
                                John J. Dorie                                13.476562%
                                             .00138882         Keystone, Inc.          
                                G. W. Shipman                                13.476562%
                                             .00104165         Thru Line Inc.          
                                Warren W. Shipman III                        13.476563%
                                             .00104165         RES Oil & Gas Ltd.      
                                Leona O'Keefe Green                          12.500000%
                                             .00104160         VLS Oil & Gas Ltd.      
                                Oral Mae Rodgers                             12.500000%
                                             .00104160         Amoco Production Company
                                Virginia Green Sparkman                       3.125000%
                                             .00104160         Perry R. Bass, Inc.     
                                John Hancock Dorie                            1.953125%
                                             .00046296                                 
                                Mark Henry Dorie                                       
                                             .00046296                                 
                                Martha Dorie Fordyce                                   
                                             .00046296 
</TABLE>

<PAGE>

                                                                   Page 30 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                      NO.                         ROYALTY OWNER    
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER    & PERCENTAGE     
- ------------------------------------------------------------------------------------
<S>  <C>                                  <C>        <C>                  <C>
       FEDERAL LANDS (CONT'D)

57   TOWNSHIP 47 NORTH, RANGE 90 WEST                  USA W-04643-B      U.S.A.
     Section 8: S/2                       480.00            HBP            All
     Section 9: SW/4                                 Bass Leases 33473,
                                                      33502, and 38847

<CAPTION>
TRACT                                     LESSEE OF RECORD            OVERRIDING ROYALTY                 WORKING INTEREST 
 NO.    DESCRIPTION OF LAND                 & PERCENTAGE              & DECIMAL INTEREST                   & PERCENTAGE
- ----------------------------------------------------------------------------------------------------------------------------------
<S>  <C>                                <C>                         <C>                             <C>
       FEDERAL LANDS (CONT'D)

57                                      Amoco Production Company    Rocky Mtn. Properties           SECTION 8: SW/4
                                            50.000000%                    .01500000
                                        RES Oil & Gas Ltd.          Charles Byrd McLean             Goliad Partners, L.P.
                                            12.500000%                    .00400000                            26.562500%
                                        VLS Oil & Gas Ltd.          Neil Thomas McLean              Sid R. Bass, Inc.
                                            12.500000%                    .00400000                            14.062500%
                                        Goliad Partners, L.P.       Anthony Charles McLean          Keystone, Inc.
                                            10.937500%                    .00200000                            14.062500%
                                        Sid R. Bass, Inc.           James Dawson Hancock, Jr.       Thru Line Inc.
                                             4.687500%              & Margaret Fox Hancock,                    14.062500%
                                        Keystone, Inc.              Trustees, the Hanco Trust       RES Oil & Gas Ltd.
                                             4.687500%                    .00104170                            12.500000%
                                        Thru Line Inc.              John L. and Mary Kathryne       VLS Oil & Gas Ltd.
                                             4.687500%              Hancock, Trustees, JLH Minroy              12.500000%
                                                                    Trust .00041670                 Perry R. Bass, Inc.
                                                                    Emile Guidroz                              6.250000%
                                                                          .00031250                              ------
                                                                    Virginia Nelle Rouer            SECTION 8: SE/4:
                                                                          .00031250                 SECTION 9: SW/4:
                                                                    Anne Luckett Fisher
                                                                          .00023440                 SURFACE TO BASE OF PHOSPHORIA
                                                                    Carol L. Collins Zachau         FORMATION:
                                                                          .00023440
                                                                    John J. Dorie                   Goliad Partners, L.P.
                                                                          .00020835                           26.562500%
                                                                    G. W. Shipman                   Sid R. Bass, Inc.
                                                                          .00015625                           14.062500%
                                                                    Warren W. Shipman III           Keystone, Inc.
                                                                          .00015625                           14.062500%
                                                                    Leona O'Keefe Green             Thru Line Inc.
                                                                          .00015620                           14.062500% 
</TABLE>

<PAGE>

                                                                   Page 31 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                      NO.                         ROYALTY OWNER    
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER    & PERCENTAGE     
- ------------------------------------------------------------------------------------
<S>  <C>                                  <C>        <C>                  <C>

       FEDERAL LANDS (CONT'D)















58   TOWNSHIP 47 NORTH, RANGE 90 WEST                   USA W-04645     U.S.A.
     Section 8: NW/4NW/4                   40.00            HBP          All  
                                                     Bass Lease 33474          

     (SEE NOTE 2)

<CAPTION>
TRACT                                     LESSEE OF RECORD            OVERRIDING ROYALTY                 WORKING INTEREST 
 NO.    DESCRIPTION OF LAND                 & PERCENTAGE              & DECIMAL INTEREST                   & PERCENTAGE
- ----------------------------------------------------------------------------------------------------------------------------------
<S>  <C>                                <C>                         <C>                             <C>

57                                                                  Oral Mae Rodgers                RES Oil & Gas Ltd.
                                                                          .00015620                            12.500000%
                                                                    Virginia Green Sparkman         VLS Oil & Gas Ltd.
                                                                          .00015620                            12.500000%
                                                                    John Hancock Dorie              Perry R. Bass, Inc.
                                                                          .00006945                             6.250000%
                                                                    Mark Henry Dorie                           ----------
                                                                          .00006945                 BELOW BASE OF PHOSPHORIA
                                                                    Martha Dorie Fordyce            FORMATION:
                                                                          .00006945
                                                                                                    Amoco Production Company
                                                                                                              25.000000%
                                                                                                    Goliad Partners, L.P.
                                                                                                              18.750000%
                                                                                                    RES Oil & Gas Ltd.
                                                                                                              12.500000%
                                                                                                    VLS Oil & Gas Ltd.
                                                                                                              12.500000%
                                                                                                    Sid R. Bass, Inc.
                                                                                                               9.375000%
                                                                                                    Keystone, Inc.
                                                                                                               9.375000%
                                                                                                    Thru Line Inc.
                                                                                                               9.375000%
                                                                                                    Perry R. Bass, Inc.
                                                                                                               3.125000%

58   TOWNSHIP 47 NORTH, RANGE 90 WEST   Amoco Production Company    Theresa Gurrieri                 PER DONLEY DRILLING UNIT AS TO
     Section 8: NW/4NW/4                   100.000000%                    .01500000                  PHOSPHORIA FORMATION ONLY:
                                                                    Anne Marie Wiley
                                                                          .00375000
</TABLE>
<PAGE>

                                                                   Page 32 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                      NO.                         ROYALTY OWNER    
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER    & PERCENTAGE     
- ------------------------------------------------------------------------------------
<S>  <C>                                  <C>        <C>                  <C>

       FEDERAL LANDS (CONT'D)


















59   TOWNSHIP 47 NORTH, RANGE 90 WEST                USA W-020846-A     U.S.A.
     Section 8: S/2NE/4                    80.00            HBP          All  

<CAPTION>
TRACT                                     LESSEE OF RECORD            OVERRIDING ROYALTY                 WORKING INTEREST 
 NO.    DESCRIPTION OF LAND                 & PERCENTAGE              & DECIMAL INTEREST                   & PERCENTAGE
- ----------------------------------------------------------------------------------------------------------------------------------
<S>  <C>                                <C>                         <C>                             <C>

58                                                                  Thomas R. Wiley                 Goliad Partners, L.P.
                                                                          .00375000                            33.116250%
                                                                    Jean D. Binford                 Sid R. Bass, Inc.
                                                                          .00187500                            18.750000%
                                                                    Ruth M. Donley                  Keystone, Inc.
                                                                          .00187500                            18.750000%
                                                                    Robert D. Gensch                Thru Line Inc.
                                                                          .00187500                            18.750000%
                                                                    Betty G. Lester                 Perry R. Bass, Inc.
                                                                          .00187500                            10.633750%
                                                                                                                 -------
                                                                                                    REMAINING ZONES:

                                                                                                    Goliad Partners, L.P.
                                                                                                               31.250000%
                                                                                                    Sid R. Bass, Inc.
                                                                                                               18.750000%
                                                                                                    Keystone, Inc.
                                                                                                               18.750000%
                                                                                                    Thru Line Inc.
                                                                                                               18.750000%
                                                                                                    Perry R. Bass, Inc.
                                                                                                               12.500000%
                                                                                                                * * * * *
59   TOWNSHIP 47 NORTH, RANGE 90 WEST   Amoco Production Company    Elliott-Hall Company            SURFACE TO BASE OF PHOSPHORIA
     Section 8: S/2NE/4                         100.000000%               .02500000                 FORMATION:
                                                                    Elliott Industries
                                                                          .02500000                 Goliad Partners, L.P.
                                                                                                               31.250000%
                                                                                                    Sid R. Bass, Inc.
                                                                                                               18.750000%
                                                                                                    Keystone, Inc.
                                                                                                               18.750000%
</TABLE>

<PAGE>

                                                                   Page 33 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                         ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER    & PERCENTAGE 
- --------------------------------------------------------------------------------------
<S>  <C>                                  <C>       <C>                <C>
       FEDERAL LANDS (CONT'D)






















                                                                                    
                                                                                    
60   TOWNSHIP 47 NORTH, RANGE 90 WEST                USA W-020846-C     U.S.A.      
     Section 9: N/2, N/2SE/4              400.00            HBP          All        
                                                    Bass Lease 33503                
                                                                                    

<CAPTION>

TRACT    LESSEE OF RECORD        OVERRIDING ROYALTY          WORKING INTEREST                
 NO.       & PERCENTAGE          & DECIMAL INTEREST            & PERCENTAGE                  
- -------------------------------------------------------------------------------------
<S>    <C>                     <C>                           <C>
                                                                                        
                                                             Thru Line Inc.                  
                                                                      18.750000%        
                                                             Perry R. Bass, Inc.             
                                                                           12.500000%        
                                                                (Assignments Pending)        
                                                                         - - - - - -
                                                             BELOW BASE OF PHOSPHORIA        
                                                             FORMATION:                      
                                                                                        
                                                             Amoco Production Company        
                                                                           50.000000%        
                                                             Goliad Partners, L. P.          
                                                                           15.625000%        
                                                             Sid R. Bass, Inc.               
                                                                            9.375000%        
                                                             Keystone, Inc.                  
                                                                            9.375000%        
                                                             Thru Line Inc.                  
                                                                            9.375000%        
                                                             Perry R. Bass, Inc.             
                                                                            6.250000%        
                                                                 (Assignments Pending)       
                                                                           * * * * * *
     Amoco Production Company  Elliott-Hall Company          SURFACE TO BASE OF PHOSPHORIA   
               100.000000%                  .0250000         FORMATION:                      
                               Elliott Industries                                            
                                            .0250000         Goliad Partners, L. P.          
                               Sprague Petroleum Co.                       31.250000%        
                                            .0100000         Sid R. Bass, Inc.               
                                                                           18.750000%        
                                                             Keystone, Inc.                  
                                                                           18.750000%    
</TABLE>


<PAGE>

                                                                   Page 34 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>


TRACT                                      NO.                        ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER   & PERCENTAGE 
- -----------------------------------------------------------------------------------
<S>  <C>                                  <C>        <C>              <C>
       FEDERAL LANDS (CONT'D)


61   TOWNSHIP 47 NORTH, RANGE 90 WEST                 USA W-020999     U.S.A.      
     Section 17: All                      640.00            HBP         All        
                                                     Bass Lease 34697               
                                                                                   




















<CAPTION>


TRACT     LESSEE OF RECORD        OVERRIDING ROYALTY          WORKING INTEREST         
 NO.        & PERCENTAGE           & DECIMAL INTEREST           & PERCENTAGE            
- --------------------------------------------------------------------------------------------
<S>     <C>                     <C>                           <C>
                                                                                  
                                                              Thru Line Inc.           
                                                                            18.750000% 
                                                              Perry R. Bass, Inc.      
                                                                            12.500000% 
                                                                 (Assignments Pending) 
                                                                           - - - - - -
                                                              BELOW BASE OF PHOSPHORIA 
                                                              FORMATION:               
                                                                                       
                                                              Amoco Production Company 
                                                                           50.000000%  
                                                              Goliad Partners, L. P.  
                                                                            15.625000% 
                                                              Sid R. Bass, Inc.        
                                                                             9.375000% 
                                                              Keystone, Inc.           
                                                                             9.375000% 
                                                              Thru Line Inc.           
                                                                             9.375000% 
                                                              Perry R. Bass, Inc.      
                                                                             6.250000% 
                                                                 (Assignments Pending) 
                                                                           * * * * * *
     Goliad Partners, L. P.    Rocky Mtn. Properties          Goliad Partners, L. P.   
                 43.750000%                 .01000000                       43.750000% 
     Sid R. Bass, Inc.         John T. Hoenshell              Sid R. Bass, Inc.        
                 18.750000%                 .00500000                       18.750000% 
     Keystone, Inc.            Alice Van Arsdale              Keystone, Inc.           
                 18.750000%                 .00500000                       18.750000% 
     Thru Line Inc.            Byron E. Van Arsdale, Jr.      Thru Line Inc.           
                 18.750000%                 .00500000                       18.750000% 

</TABLE>
<PAGE>

                                                                   Page 35 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                        ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER   & PERCENTAGE 
- ------------------------------------------------------------------------------------
<S>  <C>                                  <C>        <C>              <C>
     FEDERAL LANDS (CONT'D)

62   TOWNSHIP 47 NORTH, RANGE 90 WEST                     Buffalo       U.S.A.     
     Section 20: NW/4                     160.00         040123-A        All       
                                                           HBP      
                                                     Bass Lease 33508 
                                                                                   


<CAPTION>


TRACT     LESSEE OF RECORD        OVERRIDING ROYALTY          WORKING INTEREST                
 NO.        & PERCENTAGE          & DECIMAL INTEREST            & PERCENTAGE                   
- ------------------------------------------------------------------------------------------------
<S>     <C>                       <C>                         <C>
        Amoco Production Company    Thomas Miller McKinney         SURFACE TO BASE OF PHOSPHORIA   
                    100.000000%     Estate Trust, Priscilla Ann    FORMATION:                      
                                    Dunnum, Trustee                                                
                                                 .04000000         Goliad Partners, L. P.          
                                    Wilma V. Pierce                              31.250000%        
                                       .00500000                   Sid R. Bass, Inc.               
                                    Dale R. and Beth Ann Say                     18.750000%        
                                                 .00500000         Keystone, Inc.                  
                                                                                 18.750000%        
                                                                   Thru Line Inc.                  
                                                                                 18.750000%        
                                                                   Perry R. Bass, Inc.             
                                                                                 12.500000%        
                                                                                         
                                                                   BELOW BASE OF PHOSPHORIA        
                                                                   FORMATION:                      
                                                                                         
                                                                   Amoco Production Company        
                                                                                 50.000000%        
                                                                   Goliad Partners, L. P.         
                                                                                 15.625000%        
                                                                   Sid R. Bass, Inc.               
                                                                                  9.375000%        
                                                                   Keystone, Inc.                  
                                                                                  9.375000%        
                                                                   Thru Line Inc.                  
                                                                                  9.375000%        
                                                                   Perry R. Bass, Inc.             
                                                                                  6.250000%        

</TABLE>

<PAGE>
                                                                   Page 36 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                      NO.                          ROYALTY OWNER  
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER     & PERCENTAGE   
- ---------------------------------------------------------------------------------------
<S>  <C>                                  <C>       <C>                 <C>
       FEDERAL LANDS (CONT'D)

63   TOWNSHIP 47 NORTH, RANGE 90 WEST                     Buffalo           U.S.A.
     Section 8: NE/4NE/4                   40.00          043410              All
                                                           HBU
                                                     Bass Lease 34743
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
<CAPTION>
TRACT               LESSEE OF RECORD        OVERRIDING ROYALTY                WORKING INTEREST          
 NO.                 & PERCENTAGE           & DECIMAL INTEREST                 & PERCENTAGE             
- --------------------------------------------------------------------------------------------------------
<S>             <C>                       <C>                            <C>
63               Perry R. Bass, Inc.       Charles R. Hetzler             Perry R. Bass, Inc.
                             25.000000%                 .01000000                       25.000000%
                 Sid R. Bass, Inc.                                        Sid R. Bass, Inc.
                             18.750000%                                                 18.750000%
                 Lee M. Bass, Inc.                                        Lee M. Bass, Inc.
                             18.750000%                                                 18.750000%
                 Keystone, Inc.                                           Keystone, Inc.
                             18.750000%                                                 18.750000%
                 Thru Line Inc.                                           Thru Line Inc.
                             18.750000%                                                 18.750000%



     TOTAL FEDERAL LANDS - 20,377.04 ACRES, OR 95.14% OF UNIT AREA.

</TABLE>
<PAGE>
                                                                   Page 37 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                      NO.                          ROYALTY OWNER  
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER     & PERCENTAGE   
- ---------------------------------------------------------------------------------------
<S>  <C>                                  <C>       <C>                 <C>
            STATE LANDS

44    TOWNSHIP 47 NORTH, RANGE 91 WEST                    State           State of   
      Section 16: N/2SW/4, SE/4            240.00        0-10937           Wyoming   
                                                           HBP               All     
      (SEE NOTE 1)                                   Bass Lease 33492                


<CAPTION>
TRACT               LESSEE OF RECORD        OVERRIDING ROYALTY                WORKING INTEREST          
 NO.                 & PERCENTAGE           & DECIMAL INTEREST                 & PERCENTAGE             
- --------------------------------------------------------------------------------------------------------
<S>             <C>                       <C>                           <C>
44              Amoco Production Company  None                          SURFACE TO BASE OF PHOSPHORIA
                          100.000000%                                   FORMATION:

                                                                        WPH-GP, Inc.
                                                                                      31.250000%
                                                                        Sid R. Bass, Inc.
                                                                                      18.750000%
                                                                        Keystone, Inc.
                                                                                      18.750000%
                                                                        Thru Line Inc.
                                                                                      18.750000%
                                                                        Perry R. Bass, Inc.
                                                                                      12.500000%
                                                                                        ------
                                                                        BELOW BASE OF PHOSPHORIA
                                                                        FORMATION:

                                                                        Amoco Production Company
                                                                                      43.525000%
                                                                        WPH-GP, Inc.
                                                                                      17.648437%
                                                                        Sid R. Bass, Inc.
                                                                                      10.589063%
                                                                        Keystone, Inc.
                                                                                      10.589062%
                                                                        Thru Line Inc.
                                                                                      10.589062%
                                                                        Perry R. Bass, Inc.
                                                                                       7.059375%
</TABLE>



<PAGE>
                                                                   Page 38 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                      NO.                          ROYALTY OWNER  
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER     & PERCENTAGE   
- ---------------------------------------------------------------------------------------
<S>  <C>                                  <C>       <C>                 <C>
       STATE LANDS (CONT'D)

45     TOWNSHIP 47 NORTH, RANGE 91 WEST                      State      State of     
       Section 16: S/2SW/4                   80.00          0-10938      Wyoming     
                                                              HBP          All       
       (SEE NOTE 1)                                   Bass Lease 33493               


<CAPTION>
TRACT               LESSEE OF RECORD        OVERRIDING ROYALTY                WORKING INTEREST          
 NO.                 & PERCENTAGE           & DECIMAL INTEREST                 & PERCENTAGE             
- --------------------------------------------------------------------------------------------------------
<S>             <C>                       <C>                            <C>
45               Amoco Production Company  Amanda D. Carpenter           SURFACE TO BASE OF PHOSPHORIA
                           100.000000%                 .02500000         FORMATION:

                                                                         WPH-GP, Inc.
                                                                                       31.250000%
                                                                         Sid R. Bass, Inc.
                                                                                       18.750000%
                                                                         Keystone, Inc.
                                                                                       18.750000%
                                                                         Thru Line Inc.
                                                                                       18.750000%
                                                                         Perry R. Bass, Inc.
                                                                                       12.500000%
                                                                                       ----------
                                                                         BELOW BASE OF PHOSPHORIA
                                                                         FORMATION:

                                                                         Amoco Production Company
                                                                                      43.525000%
                                                                         WPH-GP, Inc.
                                                                                       17.648437%
                                                                         Sid R. Bass, Inc.
                                                                                       10.589063%
                                                                         Keystone, Inc.
                                                                                       10.589062%
                                                                         Thru Line Inc.
                                                                                       10.589062%
                                                                         Perry R. Bass, Inc.
                                                                                        7.059375%
</TABLE>

<PAGE>
                                                                   Page 39 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING
<TABLE>
<CAPTION>
TRACT                                      NO.                          ROYALTY OWNER  
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER     & PERCENTAGE   
- ---------------------------------------------------------------------------------------
<S>  <C>                                  <C>       <C>                 <C>
       STATE LANDS (CONT'D)

46     TOWNSHIP 47 NORTH, RANGE 91 WEST                      State      State of     
       Section 16: N/2                      320.00          0-10939      Wyoming     
                                                              HBP          All       
       (SEE NOTE 1)                                   Bass Lease 33491               
                                                                                     



<CAPTION>
TRACT               LESSEE OF RECORD        OVERRIDING ROYALTY                WORKING INTEREST          
 NO.                 & PERCENTAGE           & DECIMAL INTEREST                 & PERCENTAGE             
- --------------------------------------------------------------------------------------------------------
<S>             <C>                       <C>                            <C>

46              Amoco Production Company  Betty L. Bower                  SURFACE TO BASE OF PHOSPHORIA
                            100.000000%                .01250000          FORMATION:
                                           Al J. Johnson
                                                       .01250000          WPH-GP, Inc.
                                                                                        31.250000%
                                                                          Sid R. Bass, Inc.
                                                                                        18.750000%
                                                                          Keystone, Inc.
                                                                                        18.750000%
                                                                          Thru Line Inc.
                                                                                        18.750000%
                                                                          Perry R. Bass, Inc.
                                                                                        12.500000%
                                                                                        ----------
                                                                          BELOW BASE OF PHOSPHORIA
                                                                          FORMATION:

                                                                          Amoco Production Company
                                                                                        43.525000%
                                                                          WPH-GP, Inc.
                                                                                        17.648437%
                                                                          Sid R. Bass, Inc.
                                                                                        10.589063%
                                                                          Keystone, Inc.
                                                                                        10.589062%
                                                                          Thru Line Inc.
                                                                                        10.589062%
                                                                          Perry R. Bass, Inc.
                                                                                         7.059375%
</TABLE>



<PAGE>
                                                                   Page 40 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                      NO.                          ROYALTY OWNER  
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER     & PERCENTAGE   
- ---------------------------------------------------------------------------------------
<S>  <C>                                  <C>       <C>                 <C>
       STATE LANDS (CONT'D)

64     TOWNSHIP 47 NORTH, RANGE 90 WEST                      State      State of     
       Section 16: NE/4                     160.00          0-10517      Wyoming     
                                                              HBP          All       
                                                      Bass Lease 38844               



<CAPTION>
TRACT               LESSEE OF RECORD        OVERRIDING ROYALTY                WORKING INTEREST          
 NO.                  & PERCENTAGE          & DECIMAL INTEREST                  & PERCENTAGE            
- --------------------------------------------------------------------------------------------------------
<S>                <C>                      <C>                               <C>
64                 Perry R. Bass, Trustee    L. A. Purtell                    Perry R. Bass, Trustee
                               18.750000%                 .03125000                       18.750000%
                   Sid R. Bass, Inc.         Rocky Mtn. Properties            Sid R. Bass, Inc.
                               14.062500%                 .01500000                       14.062500%
                   Lee M. Bass, Inc.         Frances K. Kellogg & Richard     Lee M. Bass, Inc.
                               14.062500%    John Kellogg, Co-Trustees,                   14.062500%
                   Keystone, Inc.            Frances K. Kellogg Family Trust  Keystone, Inc.
                               14.062500%                 .01000000                       14.062500%
                   Thru Line Inc.            James Dawson Hancock, Jr. &      Thru Line Inc.
                               14.062500%    Margaret Fox Hancock,                        14.062500%
                   RES Oil & Gas Ltd.        Trustees, the Hanco Trust        RES Oil & Gas Ltd.
                               12.500000%                 .00694440                       12.500000%
                   VLS Oil & Gas Ltd.        John L. and Mary Kathryne        VLS Oil & Gas Ltd.
                               12.500000%    Hancock, Trustees, JLH Minroy                12.500000%
                                             Trust        .00277780
                                             Emile Guidroz
                                                          .00208330
                                             Virginia Nelle Rouer
                                                          .00208330
                                             Carol L. Collins Zachau
                                                          .00156260
                                             Anne Luckett Fisher
                                                          .00156250
                                             John J. Dorie
                                                          .00138892
                                             Leona O'Keefe Green
                                                          .00104170
                                             Oral Mae Rodgers
                                                          .00104170

</TABLE>

<PAGE>
                                                                   Page 41 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                      NO.                          ROYALTY OWNER  
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER     & PERCENTAGE   
- ---------------------------------------------------------------------------------------
<S>  <C>                                  <C>       <C>                 <C>
       STATE LANDS (CONT'D)




<CAPTION>
TRACT               LESSEE OF RECORD        OVERRIDING ROYALTY                WORKING INTEREST          
 NO.                 & PERCENTAGE           & DECIMAL INTEREST                 & PERCENTAGE             
- --------------------------------------------------------------------------------------------------------
<S>    <C>                                  <C>                               <C>
       STATE LANDS (CONT'D)
64                                          Virginia Green Sparkman
                                                         .00104170
                                            G. W. Shipman
                                                         .00104165
                                            Warren W. Shipman III
                                                         .00104165
                                            John Hancock Dorie
                                                         .00046296
                                            Mark Henry Dorie
                                                         .00046296
                                            Martha Dorie Fordyce
                                                         .00046296
                                                         * * * * * * 

<CAPTION>
TRACT                                      NO.                          ROYALTY OWNER  
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER     & PERCENTAGE   
- ---------------------------------------------------------------------------------------
<S>  <C>                                  <C>       <C>                 <C>
65   TOWNSHIP 47 NORTH, RANGE 90 WEST                      State           State of     
     Section 16: NW/4                     160.00          0-15817           Wyoming     
                                                            HBP               All      
                                                     Bass Leases 33505             
                                                         and 38845                 


<CAPTION>
TRACT               LESSEE OF RECORD          OVERRIDING ROYALTY                WORKING INTEREST          
 NO.                 & PERCENTAGE             & DECIMAL INTEREST                 & PERCENTAGE             
- --------------------------------------------------------------------------------------------------------
<S>                 <C>                       <C>                             <C>
65                  Amoco Production Company  Frances K. Kellogg & Richard    SURFACE TO BASE OF PHOSPHORIA
                                50.000000%    John Kellogg, Co-Trustees,      FORMATION:
                    RES Oil & Gas Ltd.        Frances K. Kellogg Family Trust
                                12.500000%                 .01000000          WPH-GP, Inc.
                    VLS Oil & Gas Ltd.        Rocky Mtn. Properties                        15.625000%
                                12.500000%                 .01000000          Sid R. Bass, Inc.
                    Perry R. Bass, Trustee    Joan C. Carr & Fred H. Carr,                 14.062500%
                                 6.250000%    Co-Trustees, Joan C. Carr       Keystone, Inc.
                    Sid R. Bass, Inc.         Living Trust                                 14.062500%
                                 4.687500%                 .00500000          Thru Line Inc.
                    Lee M. Bass, Inc.         James Dawson Hancock, Jr. &                  14.062500%
                                 4.687500%    Margaret Fox Hancock,           RES Oil & Gas Ltd.
                    Keystone, Inc.            Trustees, the Hanco Trust                    12.500000%
                                 4.687500%                 .00104170          VLS Oil & Gas Ltd.
                    Thru Line Inc.            John L. and Mary Kathryne                    12.500000%
                                 4.687500%    Hancock, Trustees, JLH Minroy   Perry R. Bass, Trustee
                                              Trust        .00041670                        6.250000%
</TABLE>

<PAGE>

                                                                   Page 42 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                      NO.                          ROYALTY OWNER  
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER     & PERCENTAGE   
- ---------------------------------------------------------------------------------------
<S>  <C>                                  <C>       <C>                 <C>
       STATE LANDS (CONT'D)


<CAPTION>
TRACT               LESSEE OF RECORD        OVERRIDING ROYALTY                WORKING INTEREST          
 NO.                 & PERCENTAGE           & DECIMAL INTEREST                 & PERCENTAGE             
- --------------------------------------------------------------------------------------------------------
<S>             <C>                       <C>                            <C>
                                            Emile Guidroz                  Perry R. Bass, Inc.
                                                         .00031250                        6.250000%
                                            Virginia Nelle Rouer           Lee M. Bass, Inc.
                                                         .00031250                        4.687500%
                                            Anne Luckett Fisher                           ----------
                                                         .00023440         BELOW BASE OF PHOSPHORIA
                                            Carol L. Collins Zachau        FORMATION:
                                                         .00023440
                                            John J. Dorie                  Amoco Production Company
                                                         .00020835                       25.000000%
                                            G. W. Shipman                  RES Oil & Gas Ltd.
                                                         .00015625                       12.500000%
                                            Warren W. Shipman III          VLS Oil & Gas Ltd.
                                                         .00015625                       12.500000%
                                            Leona O'Keefe Green            Sid R. Bass, Inc.
                                                         .00015620                        9.375000%
                                            Oral Mae Rodgers               Keystone, Inc.
                                                         .00015620                        9.375000%
                                            Virginia Green Sparkman        Thru Line Inc.
                                                         .00015620                        9.375000%
                                            John Hancock Dorie             WPH-GP, Inc.
                                                         .00006945                        7.812500%
                                            Mark Henry Dorie               Perry R. Bass, Trustee
                                                         .00006945                        6.250000%
                                            Martha Dorie Fordyce           Lee M. Bass, Inc.
                                                         .00006945                        4.687500%
                                                                           Perry R. Bass, Inc.
                                                                                          3.125000%

TOTAL STATE LANDS - 960.00 ACRES, OR 4.48% OF UNIT AREA.
</TABLE>

<PAGE>

                                                                   Page 43 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                      NO.                          ROYALTY OWNER  
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER     & PERCENTAGE   
- ---------------------------------------------------------------------------------------
<S>  <C>                                  <C>       <C>                 <C>
       PATENTED LANDS

66   TOWNSHIP 47 NORTH, RANGE 90 WEST                     HBP          10% ROYALTY           
     Section 8: NE/4NW/4                 40.00     Bass Leases 33475   DIVIDED AS FOLLOWS:    
     Recorded in Book 2, Page 42                    33500, 34744, and  James K. Cooper        
                                                         34745         21/192 of 10%          
     (SEE NOTE 2)                                                      Susan Donnell          
                                                                       Konkel 1/9 of          
                                                                       42/192 of 10%          
                                                                       John R. Donnell, Jr.   
                                                                       1/9 of 42/192 of 10%   
                                                                       R. Kennedy & Ann       
                                                                       Donnell Davis Revocable
                                                                       Trust, Norwest Bank,   
                                                                       Trustee                
                                                                       1/9 of 42/192 of 10%   
                                                                       William W. Donnell     
                                                                       1/9 of 42/192 of 10%   
                                                                       Thomas B. Donnell      
                                                                       1/9 of 42/192 of 10%   
                                                                       Richard H. Donnell     
                                                                       1/9 of 42/192 of 10%   
                                                                       Bruce B. Donnell       
                                                                       1/9 of 42/192 of 10%   
                                                                       Sandra D. Donnell      
                                                                       1/9 of 42/192 of 10%   
                                                                       Nancy D. Lilly         
                                                                       1/9 of 42/192 of 10%   
                                                                       Harriett L. Hares Testamentary Trust
                                                                       21/192 of 10%

<CAPTION>
TRACT               LESSEE OF RECORD        OVERRIDING ROYALTY                WORKING INTEREST          
 NO.                 & PERCENTAGE           & DECIMAL INTEREST                 & PERCENTAGE             
- --------------------------------------------------------------------------------------------------------
<S>             <C>                       <C>                            <C>

66                Goliad Partners, L. P.      None                         PER DONLEY DRILLING UNIT AS TO
                            43.750000%                                     PHOSPHORIA FORMATION ONLY:
                  Sid R. Bass, Inc.
                            18.750000%                                     Goliad Partners, L. P.
                  Keystone, Inc.                                                       33.116250%
                            18.750000%                                     Sid R. Bass, Inc.
                  Thru Line Inc.                                                       18.750000%
                            18.750000%                                     Keystone, Inc.
                                                                                       18.750000%
                                                                           Thru Line Inc.
                                                                                       18.750000%
                                                                           Perry R. Bass, Inc.
                                                                                       10.633750%
                                                                                       -----------
                                                                           REMAINING ZONES:

                                                                           Goliad Partners, L. P.
                                                                                       43.750000%
                                                                           Sid R. Bass, Inc.
                                                                                       18.750000%
                                                                           Keystone, Inc.
                                                                                       18.750000%
                                                                           Thru Line Inc.
                                                                                       18.750000%
</TABLE>

<PAGE>

                                                                   Page 44 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                      NO.                         ROYALTY OWNER  
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER    & PERCENTAGE   
- ---------------------------------------------------------------------------------------
<S>  <C>                                  <C>       <C>                <C>
     PATENTED LANDS (CONT'D)
                                                                       Marilee Endrizzl Walton Trust,
                                                                       First Interstate Bank, Agent  
                                                                       for Trustee                   
                                                                       8/192 of 10%                  
                                                                       Perry R. Bass, Trustee        
                                                                       75% of 1/4 of 29/192 of 10%   
                                                                       Perry R. Bass, Inc.,          
                                                                       25% of 1/4 of 29/192 of 10%   
                                                                       Sid R. Bass, Inc.             
                                                                       3/16 of 29/192 of 10%         
                                                                       Lee M. Bass, Inc.             
                                                                       3/16 of 29/192 of 10%         
                                                                       Keystone, Inc.                
                                                                       3/16 of 29/192 of 10%         
                                                                       Thru Line Inc.                
                                                                       3/16 of 29/192 of 10%         
                                                                       States Inc.                   
                                                                       21/192 of 10%                 
     * (Uncommitted to CA and/or Unit Agreement)                       Helen Strailiff *             
                                                                       21/192 of 10%                 
                                                                       Ronald A. Winsryg             
                                                                       21/192 of 10%                 
                                                                       * * * * * * * *

67   TOWNSHIP 47 NORTH, RANGE 90 WEST                     HBP          10% ROYALTY           
     Section 8: NW/4NE/4                 40.00   Bass Leases 33475,    DIVIDED AS FOLLOWS:   
     Recorded in Book 2, Page 42                   33500, 34744, and   FROM SURFACE TO BASE  
                                                         34745         OF PHOSPHORIA         
                                                                       FORMATION:            
                                                                                             

<CAPTION>
TRACT               LESSEE OF RECORD        OVERRIDING ROYALTY                WORKING INTEREST   
 NO.                 & PERCENTAGE           & DECIMAL INTEREST                 & PERCENTAGE      
- -------------------------------------------------------------------------------------------------
<S>             <C>                       <C>                            <C>
67                   Perry R. Bass, Inc.         None                     Perry R. Bass, Inc.    
                               25.000000%                                             25.000000% 
                     Sid R. Bass, Inc.                                    Sid R. Bass, Inc.      
                               18.750000%                                             18.750000% 
                     Lee M. Bass, Inc.                                    Lee M. Bass, Inc.      
                               18.750000%                                             18.750000% 

</TABLE>

<PAGE>
                                                                   Page 45 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                              NO.                       ROYALTY OWNER                  LESSEE OF RECORD
 NO.      DESCRIPTION OF LAND     ACRES   SERIAL NUMBER      & PERCENTAGE                    & PERCENTAGE
- ------------------------------------------------------------------------------------------------------------------------
<S>     <C>                       <C>     <C>             <C>                               <C>
        PATENTED LANDS (CONT'D)
                                                          James K. Cooper                   Keystone, Inc.
                                                          21/192 of 10%                                18.750000%
                                                          Susan Donnell                     Thru Line Inc.
                                                          Konkel 1/9 of                                18.750000%
                                                          42/192 of 10%
                                                          John R. Donnell, Jr.
                                                          1/9 of 42/192 of 10%
                                                          Ann Donnell Davis
                                                          Revocable Trust,
                                                          Norwest Bank, Trustee
                                                          1/9 of 42/192 of 10%
                                                          William W. Donnell
                                                          1/9 of 42/192 of 10%
                                                          Thomas B. Donnell
                                                          1/9 of 42/192 of 10%
                                                          Richard H. Donnell
                                                          1/9 of 42/192 of 10%
                                                          Bruce B. Donnell
                                                          1/9 of 42/192 of 10%
                                                          Sandra D. Donnell
                                                          1/9 of 42/192 of 10%
                                                          Nancy D. Lilly
                                                          1/9 of 42/192 of 10%
                                                          Harriett L. Hares Testamentary Trust
                                                          21/192 of 10%
                                                          Marilee Endrizzi Walton Trust,
                                                          First Interstate Bank, Agent
                                                          for Trustee
                                                          8/192 of 10%
                                                          Perry R. Bass, Trustee
                                                          75% of 1/4 of 29/192 of 10%
 
<CAPTION>

TRACT   OVERRIDING ROYALTY          WORKING INTEREST
 NO.    & DECIMAL INTEREST            & PERCENTAGE
- ---------------------------------------------------------
<S>    <C>                         <C>    
                                    Keystone, Inc.
                                               18.750000%
                                    Thru Line Inc.
                                               18.750000%
</TABLE>

<PAGE>
                                                                   Page 46 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                              NO.                       ROYALTY OWNER                   LESSEE OF RECORD
 NO.      DESCRIPTION OF LAND     ACRES   SERIAL NUMBER       & PERCENTAGE                     & PERCENTAGE
- ------------------------------------------------------------------------------------------------------------------------
<S>     <C>                       <C>     <C>             <C>                                <C>
        PATENTED LANDS (CONT'D)
                                                          Perry R. Bass, Inc.
                                                          25% of 1/4 of 29/192 of 10%
                                                          Sid R. Bass, Inc.
                                                          3/16 of 29/192 of 10%
                                                          Lee M. Bass, Inc.
                                                          3/16 of 29/192 of 10%
                                                          Keystone, Inc.
                                                          3/16 of 29/192 of 10%
                                                          Thru Line Inc.
                                                          3/16 of 29/192 of 10%
                                                          States Inc.
                                                          21/192 of 10%
        * (Uncommitted to CA and/or Unit Agreement)       Helen Straitiff *
                                                          21/192 of 10%
                                                          Ronald A. Winsryg
                                                          21/192 of 10%
                                                          ---------------

                                                        BELOW PHOSPHORIA FORMATION:

                                                          James K. Cooper
                                                          21/192 of 10%
                                                          Susan Donnell
                                                          Konkel 1/9 of
                                                          42/192 of 10%
                                                          John R. Donnell, Jr.
                                                          1/9 of 42/192 of 10%
                                                          Ann Donnell Davis
                                                          Revocable Trust,
                                                          Norwest Bank, Trustee
                                                          1/9 of 42/192 of 10%
 
<CAPTION>

TRACT  OVERRIDING ROYALTY      WORKING INTEREST
 NO.   & DECIMAL INTEREST        & PERCENTAGE
- -----------------------------------------------------
<S>    <C>                   <C>                    
</TABLE>

<PAGE>
                                                                   Page 47 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                              NO.                         ROYALTY OWNER                   LESSEE OF RECORD
 NO.      DESCRIPTION OF LAND     ACRES   SERIAL NUMBER        & PERCENTAGE                      & PERCENTAGE
- -----------------------------------------------------------------------------------------------------------------------
<S>     <C>                       <C>     <C>             <C>                                  <C>
        PATENTED LANDS (CONT'D)
                                                          William W. Donnell
                                                          1/9 of 42/192 of 10%
                                                          Thomas B. Donnell
                                                          1/9 of 42/192 of 10%
                                                          Richard H. Donnell
                                                          1/9 of 42/192 of 10%
                                                          Bruce B. Donnell
                                                          1/9 of 42/192 of 10%
                                                          Sandra D. Donnell
                                                          1/9 of 42/192 of 10%
                                                          Nancy D. Lilly
                                                          1/9 of 42/192 of 10%
                                                          Harriett L. Hares Testamentary Trust
                                                          21/192 of 10%
                                                          Marilee Endrizzi Walton Trust,
                                                          First Interstate Bank, Agent
                                                          for Trustee
                                                          8/192 of 10%
                                                          Perry R. Bass, Trustee
                                                          1/2 of 75% of 1/4 of 29/192 of 10%
                                                          Perry R. Bass, Inc.
                                                          1/2 of 25% of 1/4 of 29/192 of 10%
                                                          Sid R. Bass, Inc.
                                                          1/2 of 3/16 of 29/192 of 10%
                                                          Lee M. Bass, Inc.
                                                          1/2 of 3/16 of 29/192 of 10%
                                                          Keystone, Inc.
                                                          1/2 of 3/16 of 29/192 of 10%
                                                          Thru Line Inc.
                                                          1/2 of 3/16 of 29/192 of 10%
 
<CAPTION>

TRACT  OVERRIDING ROYALTY      WORKING INTEREST
NO.    & DECIMAL INTEREST        & PERCENTAGE
- --------------------------------------------------
<S>    <C>                   <C>                  
</TABLE>

<PAGE>
                                                                   Page 48 of 48
         EXHIBIT A-1 PURCHASE AND SALE AGREEMENT DATED _________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
               AND OPERATION OF THE COTTONWOOD CREEK UNIT AREA
                           WASHAKIE COUNTY, WYOMING
<TABLE>
<CAPTION>
TRACT                              NO.                         ROYALTY OWNER                   LESSEE OF RECORD
 NO.      DESCRIPTION OF LAND     ACRES   SERIAL NUMBER        & PERCENTAGE                     & PERCENTAGE
- ------------------------------------------------------------------------------------------------------------------------
<S>     <C>                       <C>     <C>             <C>                                  <C>
        PATENTED LANDS (CONT'D)
                                                          Amoco Production Company
                                                          1/2 of 29/192 of 10%
                                                          States Inc.
                                                          21/192 of 10%
        * (Uncommitted to CA and/or Unit Agreement)       Helen Straitiff *
                                                          21/192 of 10%
                                                          Ronald A. Winsryg
                                                          21/192 of 10%

        TOTAL PATENTED LANDS - 80.00 ACRES, OR .38% OF UNIT AREA.

</TABLE>

                                 RECAPITULATION
<TABLE>
<CAPTION>
                  LAND          ACRES      PERCENTAGE
                  --------    ---------    ----------
                  <S>         <C>          <C>
                  Federal     20,377.04      95.14%
                  State          960.00       4.48%
                  Patented        80.00        .38%
                              ---------    ----------
                    TOTAL     21,417.04     100.00%
</TABLE>

NOTE 1:  This lease is subject to Pooling Agreement dated September 8, 1952, as
         amended, between Stanolind Oil and Gas Company and General Petroleum
         Corporation which provided for the sharing of costs and production as
         follows:   Stanolind/Amoco - 87.05%
                    General/Mobil -   12.95%
         Deep rights reflect pooled interests. Bass acquired 100% of interest in
         shallow depths subject to Pooling Agreement.

NOTE 2:  This lease is committed to the Donley Drilling Unit dated June 29, 
         1956, and to Communitization Agreement No. 14-08-001-3468, effective 
         August 9, 1956, approved November 5, 1956. Said Agreements cover 
         Tracts 55, 58, and 66, containing 160.00 acres, more or less.


<PAGE>
                                                                 Page 1 of 23

              EXHIBIT A-2   PURCHASE AND SALE AGREEMENT DATED _________, 1998

                                     REVISED EXHIBIT B
                                      JANUARY 1, 1998
             ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
   AND OPERATION OF THE COTTONWOOD CREEK FIELD EXTENSION (PHOSPHORIA) UNIT AREA
                                  WASHAKIE COUNTY, WYOMING


<TABLE>
<CAPTION>

TRACT                                      NO.                                       ROYALTY OWNER 
 NO.    DESCRIPTION OF LAND               ACRES               SERIAL NUMBER          & PERCENTAGE  
- ---------------------------------------------------------------------------------------------------
<S>  <C>                                  <C>         <C>                            <C>
               FEDERAL LANDS

1    TOWNSHIP 46 NORTH, RANGE 91 WEST                           USA W-688                U.S.A.    
     Section 1: Lots 5, 6, 11, and 12     124.68                   HBP                    100%     
                                                         Bass Leases 31102, 32241,                 
                                                      33400, 34266, 38358, and 40495               
                                                                                                   
                                                                                                   
                                                                                                   
2    TOWNSHIP 46 NORTH, RANGE 91 WEST                           USA W-688                U.S.A.    
     Section 1: Lots 13,14, S/2NE/4       160.00                   HBP                    100%     
                                                         Bass Leases 31102, 32241,                 
                                                      33400, 34266, 38358, and 40495               
                                                                                                   


<CAPTION>


TRACT        LESSEE OF RECORD           OVERRIDING ROYALTY                   WORKING INTEREST            
 NO.           & PERCENTAGE             & DECIMAL INTEREST                     & PERCENTAGE              
- ---------------------------------------------------------------------------------------------------------
<S>         <C>                       <C>                               <C>
1           Worland Associates        Burton G. Lowe                    SURFACE TO TOP OF PHOSPHORIA     
                      100.000000%                 .00666667             FORMATION:                       
                                      Joseph S. Pollare Living Trust,                                    
                                      Joseph S. Pollare Trustee         Worland Associates               
                                                  .00666667                         100.000000%          
                                      Swinehart 1973 Trust, John C.                  - - - - - -
                                      Swinehart and Leslie Mallett,     PHOSPHORIA FORMATION ONLY:       
                                      Co-Trustees                                                        
                                                  .00666666             Worland Associates               
                                                                                     50.000000%          
                                                                        Worland Associates II            
                                                                                     50.000000%          
                                                                                     - - - - - -
                                                                        BELOW BASE OF PHOSPHORIA         
                                                                        FORMATION:                       

                                                                        Worland Associates               
                                                                                    100.000000%          
                                                                                     * * * * * *
2           Worland Associates        Lakeview Oil Company              SURFACE TO BASE OF PHOSPHORIA    
                      100.000000%                   .01237500           FORMATION, OR WHERE THE          
                                      Allagesh Oil Company              PHOSPHORIA FORMATION IS NOT      
                                                    .01000000           FOUND, TO A DEPTH OF 9,580       
                                      E.E. Engleman                     FEET:                            
                                                    .01000000                                            
                                      Sims Properties                   Goliad Partners, L. P.           
                                                    .01000000                        37.500000%          
                                                                        Sid R. Bass, Inc.                
                                                                                     18.750000%          

</TABLE>


<PAGE>
                                                                 Page 2 of 23

              EXHIBIT A-2   PURCHASE AND SALE AGREEMENT DATED _________, 1998

                                      REVISED EXHIBIT B
                                       JANUARY 1, 1998
              ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
   AND OPERATION OF THE COTTONWOOD CREEK FIELD EXTENSION (PHOSPHORIA) UNIT AREA
                                  WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                                  ROYALTY OWNER  
 NO.    DESCRIPTION OF LAND               ACRES            SERIAL NUMBER        & PERCENTAGE   
- -----------------------------------------------------------------------------------------------
<S>  <C>                                  <C>          <C>                      <C>
     FEDERAL LANDS (CONT'D)
                                                                                               


3    TOWNSHIP 47 NORTH, RANGE 90 WEST                        USA W-03441-A         U.S.A.      
     Section 29: S/2SW/4, NW/4SW/4        120.00                  HBP               100%       
                                                       Bass Leases 33350, 33509,               
                                                        38848, 38855, and 39039                
                                                                                               


<CAPTION>


TRACT         LESSEE OF RECORD               OVERRIDING ROYALTY                WORKING INTEREST             
 NO.            & PERCENTAGE                 & DECIMAL INTEREST                  & PERCENTAGE               
- ------------------------------------------------------------------------------------------------------------
<S>       <C>                              <C>                               <C>
                                           T-Bar Oil & Gas, Ltd.             Keystone, Inc.                 
                                                        .00850000                       18.750000%          
                                           Burton G. Lowe                    Thru Line Inc.                 
                                                        .00667000                       18.750000%          
                                           Joseph S. Pollare Living Trust,   Perry R. Bass, Inc.            
                                           Joseph S. Pollare Trustee                     6.250000%          
                                                        .00667000                        - - - - - -
                                           Swinehart 1973 Trust, John C.     BELOW BASE OF PHOSPHORIA       
                                           Swinehart and Leslie Mallett,     FORMATION, OR WHERE THE        
                                           Co-Trustees                       PHOSPHORIA FORMATION IS NOT    
                                                        .00666000            FOUND, TO A DEPTH OF 9,580     
                                           Harry M. Perry                    FEET:                          
                                                        .00412500                                           
                                                                             Worland Associates             
                                                                                       100.000000%          
                                                                                     * * * * * *
3         Mobil Expl. & Prod. North        Rocky Mtn. Properties             PHOSPHORIA FORMATION ONLY:     
          America, Inc.                                 .02500000                                           
                      100.000000%          Devon Energy Corporation          Goliad Partners, L. P.         
                                                        .01000000                       34.080923%          
                                           Betty S. Veronda                  Sid R. Bass, Inc.              
                                                        .01000000                       18.750000%          
                                           Perry R. Bass, Inc.               Keystone, Inc.                 
                                                        .00125000                       18.750000%          
                                           Sid R. Bass, Inc.                 Thru Line Inc.                 
                                                        .00093750                       18.750000%          
                                           Lee M. Bass, Inc.                 Perry R. Bass, Inc.            
                                                        .00093750                        9.669077%          
                                           Keystone, Inc.                               - - - - - -
                                                        .00093750            ALL OTHER FORMATIONS:          

</TABLE>

<PAGE>
                                                                Page 3 of 23

              EXHIBIT A-2   PURCHASE AND SALE AGREEMENT DATED _________, 1998

                                  REVISED EXHIBIT B
                                  JANUARY 1, 1998
          ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
   AND OPERATION OF THE COTTONWOOD CREEK FIELD EXTENSION (PHOSPHORIA) UNIT AREA
                              WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                                    ROYALTY OWNER  
 NO.    DESCRIPTION OF LAND               ACRES            SERIAL NUMBER          & PERCENTAGE   
- -------------------------------------------------------------------------------------------------
<S>  <C>                                  <C>         <C>                         <C>
       FEDERAL LANDS (CONT'D)

                                                                                                 
                                                                                                 
4    TOWNSHIP 47 NORTH, RANGE 91 WEST                        USA W-06876              U.S.A.     
     Section 26: SE14                     160.00                HBP                    100%      
                                                      Bass Leases 33349, 33499,                  
                                                          38856, and 39037                       
                                                                                                 


<CAPTION>


TRACT          LESSEE OF RECORD              OVERRIDING ROYALTY                  WORKING INTEREST             
 NO.             & PERCENTAGE                & DECIMAL INTEREST                     & PERCENTAGE              
- --------------------------------------------------------------------------------------------------------------
<S>          <C>                           <C>                               <C>
                                                                                                              
                                           Thru Line Inc.                    Mobil Expl. & Prod. Co.          
                                                        .00093750                      100.000000%            
                                                         * * * * * *                    * * * * * *           
4            Mobil Expl. & Prod. North     V. H. Knisely                     SURFACE TO BASE OF PHOSPHORIA    
             America, Inc.                              .01750000            FORMATION:                       
                            100%           Mobil Expl. & Prod. North                                          
                                           America, Inc.                     Goliad Partners, L. P.           
                                                        .01500000                       34.080923%            
                                           Bruce Anderson                    Sid R. Bass, Inc.                
                                                        .00875000                       18.750000%            
                                           K & R Enterprises                 Keystone, Inc.                   
                                                        .00500000                       18.750000%            
                                           Richard L. Peterson               Thru Line Inc.                   
                                                        .00375000                       18.750000%            
                                                                             Perry R. Bass, Inc.              
                                                                                         9.669077%
                                                                                         --------
                                                                             BELOW BASE OF PHOSPHORIA         
                                                                             FORMATION:                       
                                                                                                              
                                                                             Goliad Partners, L. P.          
                                                                                        33.128216%            
                                                                             Sid R. Bass, Inc.                
                                                                                        18.178376%            
                                                                             Keystone, Inc.                   
                                                                                        18.178375%            
                                                                             Thru Line Inc.                   
                                                                                        18.178375%            
                                                                             Perry R. Bass, Inc.              
                                                                                         9.287993%            
</TABLE>

<PAGE>
                                                                    Page 4 of 23

              EXHIBIT A-2   PURCHASE AND SALE AGREEMENT DATED _________, 1998

                                    REVISED EXHIBIT B
                                     JANUARY 1, 1998
            ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
    AND OPERATION OF THE COTTONWOOD CREEK FIELD EXTENSION (PHOSPHORIA) UNIT AREA
                                WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                              ROYALTY OWNER    
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER         & PERCENTAGE     
- -----------------------------------------------------------------------------------------
<S>  <C>                                  <C>      <C>                      <C>
     FEDERAL LANDS (CONT'D)






5    TOWNSHIP 47 NORTH, RANGE 90 WEST                   USA W-44459            U.S.A.      
     Section 32: W/2NE/4                   80.00            HBP                100%           
                                                   Bass Leases 33354, 33382,              
                                                   33390, 33394, 33513,                  
                                                     38854, and 39038                    
                                                                                        


                                                                                        
                                                                                        
TRACT  LESSEE OF RECORD        OVERRIDING ROYALTY                 WORKING INTEREST               
 NO.     & PERCENTAGE          & DECIMAL INTEREST                   & PERCENTAGE                    
- ------------------------------------------------------------------------------------------------
<S>    <C>                    <C>                               <C>        
                                                                                                 
                                                                                                 
                                                                Amoco Production Company   
                                                                        3.048665% 
                                                                       * * * * * *
                                                                                                 
5     Goliad Partners, L.P.     Lakeview Oil Company            SURFACE TO BASE OF PHOSPHORIA 
             30.678025%                 .00529290               FORMATION:                      
      Sid R. Bass, Inc.         Frank Lovett                        
             17.415372%                 .00176430               Goliad Partners, L.P.
      Keystone, Inc.                                                         31.790212%         
             17.415371%                                         Sid R. Bass, Inc.                   
      Thru Line Inc.                                                         18.082684%         
             17.415371%                                         Keystone, Inc.                      
      Perry R. Bass, Inc.                                                    18.082684%         
              9.957841%                                         Thru Line Inc.                      
      William G. Helis Estate                                                18.082684%         
              3.559020%                                         Perry R. Bass, Inc.                 
      Amoco Production Company                                               10.402716%         
              3.559000%                                         William G. Helis Estate             
                                                                              3.559020%               
                                                                           * * * * * *
                                                                BELOW BASE OF PHOSPHORIA            
                                                                FORMATION:                          
                                                                                                 
                                                                Goliad Partners, L.P.
                                                                             31.234119%               
                                                                Sid R. Bass, Inc.                   
                                                                             17.749028%               
                                                                Keystone Inc.                       
                                                                             17.749027%               
                                                                Thru Line Inc.                      
                                                                             17.749027%               
                                                                                                                 
                                                                                                    
</TABLE>

<PAGE>

                                                                    Page 5 of 23

              EXHIBIT A-2   PURCHASE AND SALE AGREEMENT DATED _________, 1998

                                   REVISED EXHIBIT B
                                   JANUARY 1, 1998
         ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
   AND OPERATION OF THE COTTONWOOD CREEK FIELD EXTENSION (PHOSPHORIA) UNIT AREA
                             WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                           ROYALTY OWNER 
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER      & PERCENTAGE  
- ----------------------------------------------------------------------------------------
<S>  <C>                                  <C>      <C>                   <C>
5    FEDERAL LANDS (CONT'D)





                                                                                     
                                                                                     
6    TOWNSHIP 46 NORTH, RANGE 90 WEST                  USA W-32937            U.S.A.       
     Section 6: S/2NE/4, NE/4SW/4         120.00          HBP                 100%        
                                                      Bass Leases 33391,                
                                                   33401, 34267, and 38359            
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
7    TOWNSHIP 46 NORTH, RANGE 90 WEST                   USA W-32937          U.S.A.       
     Section 6: N/2SE/4                    80.00            HBP              100%        
                                                      Bass Leases 33391,                
                                                   33401, 34267, and 38359            
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     

TRACT   LESSEE OF RECORD        OVERRIDING ROYALTY             WORKING INTEREST                      
 NO.     & PERCENTAGE           & DECIMAL INTEREST               & PERCENTAGE                         
- ------------------------------------------------------------------------------------------------
<S>  <C>                       <C>                             <C>
                                                                                             
                                                               Perry R. Bass, Inc.                
                                                                          10.180279%              
                                                               William G. Helis Estate            
                                                                           3.559020%              
                                                               Amoco Production Company           
                                                                           1.779500%              
                                                                        * * * * * *
6    Goliad Partners, L. P.    Maurice W. Brown                Goliad Partners, L.P.           
               35.416667%                 .04000000                       35.416667%              
     Sid R. Bass, Inc.         Joseph S. Rose, Jr.             Sid R. Bass, Inc.                
               18.750000%                 .01000000                       18.750000%              
     Keystone, Inc.            Lakeview Oil Company            Keystone, Inc.                   
               18.750000%                 .00825000                       18.750000%              
     Thru Line Inc.            T-Bar Oil & Gas, Ltd.           Thru Line Inc.                               
               18.750000%                 .00566666                       18.750000%              
     Perry R. Bass, Inc.       Frank Lovett                    Perry R. Bass, Inc.                          
                8.333333%                 .00275000                        8.333333%              
              * * * * * *               * * * * * *                     * * * * * *
7    Goliad Partners, L. P.    Maurice W. Brown                Goliad Partners, L.P.           
               35.416667%                 .04000000                       35.416667%              
     Sid R. Bass, Inc.         Joseph S. Rose, Jr.             Sid R. Bass, Inc.                
               18.750000%                 .01000000                       18.750000%              
     Keystone, Inc.            Lakeview Oil Company            Keystone, Inc.                   
               18.750000%                 .00825000                       18.750000%              
     Thru Line Inc.            T-Bar Oil & Gas, Ltd.           Thru Line Inc.                               
               18.750000%                 .00566666                       18.750000%              
     Perry R. Bass, Inc.       Frank Lovett                    Perry R. Bass, Inc.              
                8.333333%                 .00275000                        8.333333%              

</TABLE>

<PAGE>

                                                                    Page 6 of 23

              EXHIBIT A-2   PURCHASE AND SALE AGREEMENT DATED _________, 1998

                                     REVISED EXHIBIT B
                                      JANUARY 1, 1998
             ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
    AND OPERATION OF THE COTTONWOOD CREEK FIELD EXTENSION (PHOSPHORIA) UNIT AREA
                                 WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>


TRACT                                      NO.                             ROYALTY OWNER 
 NO.    DESCRIPTION OF LAND               ACRES      SERIAL NUMBER         & PERCENTAGE  
- ----------------------------------------------------------------------------------------
<S>  <C>                                   <C>      <C>                   <C>
     FEDERAL LANDS (CONT'D)

 8   TOWNSHIP 46 NORTH, RANGE 90 WEST                   USA W-36572            U.S.A.       
     Section 6: Lots 16 and 17             80.00           HBP                  100%        
                                                       Bass Leases 33392,               
                                                    33402, 34268, and 38357            
                                                                                    
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
 9   TOWNSHIP 46 NORTH, RANGE 90 WEST                   USA W-0134933           U.S.A.        
     Section 5: S/2NW/4                    80.00            HBP                  100%        
                                                       Bass Lease 33360                 
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
10   TOWNSHIP 47 NORTH, RANGE 90 WEST                   USA W-0134988-B          U.S.A.       
     Section 32: W/2SE/4                   80.00            HBP                   100%        
                                                       Bass Lease 33352              
                                                                                     

                                                                                     
TRACT   LESSEE OF RECORD        OVERRIDING ROYALTY                WORKING INTEREST  
 NO.      & PERCENTAGE          & DECIMAL INTEREST                  & PERCENTAGE   
- ----------------------------------------------------------------------------------------------
<S>  <C>                       <C>                               <C>
                                                                                               
                                                                                               
 8   Goliad Partners, L. P.    T-Bar Oil & Gas, Ltd.             Goliad Partners, L. P.       
               35.416667%                 .01700000                       35.416667%           
     Sid R. Bass, Inc.         Lakeview Oil Company              Sid R. Bass, Inc.            
               18.750000%                 .00875000                       18.750000%           
     Keystone, Inc.            Frank Lovett                      Keystone, Inc.               
               18.750000%                 .00291700                       18.750000%           
     Thru Line Inc.                                              Thru Line Inc.               
               18.750000%                                                 18.750000%           
     Perry R. Bass, Inc.                                         Perry R. Bass, Inc.          
                8.333333%                                                  8.333333%           
              * * * * * *                                                * * * * * *
 9   Goliad Partners, L. P.    Sella R. Hayutin                  Goliad Partners, L. P.       
               31.250000%                 .04000000                       31.250000%           
     Sid R. Bass, Inc.         Rosalie Hayutin VanHorn           Sid R. Bass, Inc.        
               18.750000%                 .04000000                       18.750000%           
     Keystone, Inc.                                              Keystone, Inc.               
               18.750000%                                                 18.750000%           
     Thru Line Inc.                                              Thru Line Inc.               
               18.750000%                                                 18.750000%           
     Perry R. Bass, Inc.                                         Perry R. Bass, Inc.          
               12.500000%                                                 12.500000%           
              * * * * * *                                                * * * * * *
10   Goliad Partners, L. P.    A. M. Culver Company              Goliad Partners, L. P.       
               31.250000%                 .04000000                       31.250000%           
     Sid R. Bass, Inc.                                           Sid R. Bass, Inc.            
               18.750000%                                                 18.750000%           
     Keystone, Inc.                                              Keystone, Inc.               
               18.750000%                                                 18.750000%           
     Thru Line Inc.                                              Thru Line Inc.               
               18.750000%                                                 18.750000%           
     
</TABLE>

<PAGE>
                                                                Page 7 of 23

            EXHIBIT A-2 PURCHASE AND SALE AGREEMENT DATED _________, 1998   

                                  REVISED EXHIBIT B
                                   JANUARY 1, 1998
          ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
   AND OPERATION OF THE COTTONWOOD CREEK FIELD EXTENSION (PHOSPHORIA) UNIT AREA
                          WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                    NO.                                ROYALTY OWNER 
 NO.  DESCRIPTION OF LAND               ACRES      SERIAL NUMBER            & PERCENTAGE  
- ------------------------------------------------------------------------------------------
<S>   <C>                               <C>        <C>                      <C>
      FEDERAL LANDS (CONT'D)


                                                                                     
                                                                                     


11   TOWNSHIP 47 NORTH, RANGE 90 WEST               USA W-0148758-B            U.S.A.       
     Section 31: SE/4                   160.00            HBP                   100%         
                                                     Bass Leases 33355,                
                                                   33395, 34269, and 38352            
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
12   TOWNSHIP 46 NORTH, RANGE 90 WEST                  USA W-0168275           U.S.A.        
     Section 5: Lots 7, 8, 9, 10, 15,   206.00            HBP                   100%        
     and 16                                        Bass Leases 33357, 33397,           
                                                     34270, and 38353                 
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                                           
TRACT   LESSEE OF RECORD        OVERRIDING ROYALTY          WORKING INTEREST                  
 NO.    & PERCENTAGE           & DECIMAL INTEREST            & PERCENTAGE                     
- -------------------------------------------------------------------------------------- 
<S>  <C>                       <C>                          <C>

11   Perry R. Bass, Inc.                                         Perry R. Bass, Inc.
               12.500000%                                                 12.500000%
                ******                                                     ******

     Goliad Partners, L.P.     A. M. Culver Company              Goliad Partners, L.P. 
               34.375000%                 .03000000                       34.375000%   
     Sid R. Bass, Inc.         Lakeview Oil Company              Sid R. Bass, Inc.     
               18.750000%                 .00618750                       18.750000%   
     Keystone, Inc.            T-Bar Oil & Gas, Ltd.             Keystone, Inc.   
               18.750000%                 .00425000                       18.750000%   
     Thru Line Inc.            Sims Properties                   Thru Line Inc.        
               18.750000%                 .00333340                       18.750000%   
     Perry R. Bass, Inc.       Allagesh Oil Company              Perry R. Bass, Inc.   
                9.375000%                 .00333330                        9.375000%   
                               E. E. Engleman       
                                          .00333330 
                               Harry M. Perry       
                                          .00206250
                                          * * * * * *
12   Goliad Partners, L.P.     Elaine Wolf                       Goliad Partners, L.P. 
               31.250000%                 .03000000                       31.250000%   
     Sid R. Bass, Inc.                                           Sid R. Bass, Inc.     
               18.750000%                                                 18.750000%   
     Keystone, Inc.                                              Keystone, Inc.        
               18.750000%                                                 18.750000%   
     Thru Line Inc.                                              Thru Line Inc.        
               18.750000%                                                 18.750000%   
     Perry R. Bass, Inc.                                         Perry R. Bass, Inc.   
               12.500000%                                                 12.500000%   

</TABLE>

<PAGE>
                                                               Page 8 of 23

          EXHIBIT A-2 PURCHASE AND SALE AGREEMENT DATED _________, 1998   

                                REVISED EXHIBIT B
                                 JANUARY 1, 1998
      ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
  AND OPERATION OF THE COTTONWOOD CREEK FIELD EXTENSION (PHOSPHORIA) UNIT AREA
                             WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                     NO.                              ROYALTY OWNER  
 NO.  DESCRIPTION OF LAND               ACRES       SERIAL NUMBER          & PERCENTAGE   
- -------------------------------------------------------------------------------------------
<S>   <C>                               <C>      <C>                      <C>
      FEDERAL LANDS (CONT'D)

13    TOWNSHIP 46 NORTH, RANGE 90 WEST               USA W-0168275             U.S.A.         
      Section 6: Lot 21                  36.34           HBP                    100%         
                                                 Bass Leases 33357, 33397,            
                                                    34270, and 38353                  
                                                                                      
                                                                                      
                                                                                      
                                                                                      
                                                                                      
                                                                                      
                                                                                      
                                                                                      
                                                                                      
                                                                                      
14    TOWNSHIP 46 NORTH, RANGE 90 WEST               USA W-0168275             U.S.A.
      Section 6: Lots 8, 9, 14, and 15  125.52           HBP                    100%
                                                 Bass Leases 33357, 33397,            
                                                    34270, and 38353                  
                                                                                      
                                                                                      
                                                                                      
TRACT   LESSEE OF RECORD        OVERRIDING ROYALTY          WORKING INTEREST                
 NO.    & PERCENTAGE           & DECIMAL INTEREST            & PERCENTAGE                   
- --------------------------------------------------------------------------------------      
<S>   <C>                      <C>                          <C>
                                                                                            
13    Goliad Partners, L.P.     Elaine Wolf                 Goliad Partners, L.P.     
               31.250000%                 .03000000                       34.375000%       
      Sid R. Bass, Inc.         Lakeview Oil Company        Sid R. Bass, Inc.    
               18.750000%                 .00618750                       18.750000%       
      Keystone, Inc.            T-Bar Oil & Gas, Ltd.       Keystone, Inc.           
               18.750000%                 .00425000                       18.750000%       
      Thru Line Inc.            Sims Properties             Thru Line Inc.           
               18.750000%                 .00333400                       18.750000%       
      Perry R. Bass, Inc.       Allagesh Oil Company        Perry R. Bass, Inc.      
               12.500000%                 .00333300                        9.375000%       
                                E. E. Engleman 
                                          .00333300  
                                Harry M. Perry 
                                          .00206250  
                                            ******
      
14    Goliad Partners, L.P.     Elaine Wolf                 Goliad Partners, L.P.   
               31.250000%                 .03000000                       34.375000%       
      Sid R. Bass, Inc.         Lakeview Oil Company        Sid R. Bass, Inc.    
               18.750000%                 .00618750                       18.750000%       
      Keystone, Inc.            T-Bar Oil & Gas, Ltd.       Keystone, Inc.                       
               18.750000%                 .00425000                       18.750000%       
      Thru Line Inc.            Sims Properties             Thru Line Inc.           
               18.750000%                 .00333340                       18.750000%       
      Perry R. Bass, Inc.       Allagesh Oil Company        Perry R. Bass, Inc.      
               12.500000%                 .00333330                        9.375000%       
                                E.E. Engleman                                          
                                          .00333330                                        
                                Harry M. Perry                   
                                          .00206250                                        

</TABLE>
<PAGE>
                                                               Page 9 of 23

           EXHIBIT A-2 PURCHASE AND SALE AGREEMENT DATED _________, 1998   

                                 REVISED EXHIBIT B
                                  JANUARY 1, 1998
         ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
   AND OPERATION OF THE COTTONWOOD CREEK FIELD EXTENSION (PHOSPHORIA) UNIT AREA
                              WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                    NO.                                   ROYALTY OWNER             
 NO.  DESCRIPTION OF LAND               ACRES       SERIAL NUMBER              & PERCENTAGE  
- -----------------------------------------------------------------------------------------------
<S>   <C>                               <C>         <C>                        <C>
      FEDERAL LANDS (CONT'D)

15    TOWNSHIP 47 NORTH, RANGE 90 WEST                USA W-0254680-A             U.S.A.       
      Section 31: Lots 5, 6, E/2NW/4     158.56            HBP                     100%        
                                                    Bass Leases 33351, 33393,         
                                                       34271, and 38351              
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
16    TOWNSHIP 47 NORTH, RANGE 90 WEST                USA W-0254680-A             U.S.A.       
      Section 31: Lots 7, 8, E/2SW/4     158.72            HBP                     100%        
                                                   Bass Leases 33351,                
                                                   33393, 34271, and 38351            
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
TRACT   LESSEE OF RECORD        OVERRIDING ROYALTY          WORKING INTEREST               
 NO.    & PERCENTAGE           & DECIMAL INTEREST            & PERCENTAGE                  
- --------------------------------------------------------------------------------------     
<S>   <C>                      <C>                          <C>
                                                                                           
15    Goliad Partners, L.P.    Allagesh Oil Company         Goliad Partners, L.P.    
               31.250000%                 .00750000                       34.375000%       
      Sid R. Bass, Inc.        E. E. Engleman               Sid R. Bass, Inc.    
               18.750000%                 .00750000                       18.750000%       
      Keystone, Inc.           Sims Properties              Keystone, Inc.
               18.750000%                 .00750000                       18.750000%       
      Thru Line Inc.           Lakeview Oil Company         Thru Line Inc.           
               18.750000%                 .00618750                       18.750000%       
      Perry R. Bass, Inc.      Robert J. Connaghan          Perry R. Bass, Inc.      
               12.500000%                 .00500000                       9.375000%       
                               T-Bar Oil & Gas, Ltd.
                                          .00425000
                               Harry M. Perry                                                                       
                                          .00206250                                        
                                            *******
16    Goliad Partners, L.P.    Allagesh Oil Company         Goliad Partners, L.P.   
               31.250000%                 .01500000                       34.375000%       
      Sid R. Bass, Inc.        Sims Properties              Sid R. Bass, Inc.    
               18.750000%                 .00750000                       18.750000%       
      Keystone, Inc.           Lakeview Oil Company         Keystone, Inc.                       
               18.750000%                 .00618800                       18.750000%       
      Thru Line Inc.           Robert J. Connaghan          Thru Line Inc.           
               18.750000%                 .00500000                       18.750000%       
      Perry R. Bass, Inc.      T-Bar Oil & Gas, Ltd.        Perry R. Bass, Inc.      
               12.500000%                 .00425000                        9.375000%
                               Harry M. Perry
                                          .00206300 

</TABLE>

<PAGE>
                                                               Page 10 of 23

            EXHIBIT A-2  PURCHASE AND SALE AGREEMENT DATED _________, 1998   

                                 REVISED EXHIBIT B
                                  JANUARY 1, 1998
         ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
   AND OPERATION OF THE COTTONWOOD CREEK FIELD EXTENSION (PHOSPHORIA) UNIT AREA
                             WASHAKIE COUNTY, WYOMING


<TABLE>
<CAPTION>

TRACT                                      NO.                                       ROYALTY OWNER 
 NO.    DESCRIPTION OF LAND               ACRES               SERIAL NUMBER          & PERCENTAGE  
- ---------------------------------------------------------------------------------------------------
<S>  <C>                                 <C>          <C>                            <C>
        FEDERAL LANDS (CONT'D)

17   TOWNSHIP 47 NORTH, RANGE 90 WEST                     USA W-0325327                 U.S.A.
     Section 30: Lots 7, 8, E/2SW/4,      318.46               HBP                       100%
                SE/4                                      Bass Lease 33510


<CAPTION>
TRACT        LESSEE OF RECORD          OVERRIDING ROYALTY                    WORKING INTEREST            
 NO.           & PERCENTAGE             & DECIMAL INTEREST                     & PERCENTAGE              
- ---------------------------------------------------------------------------------------------------------
<S>         <C>                       <C>                               <C>
17          Amoco Production Company  G E O Exploration Inc.            SURFACE TO BASE OF PHOSPHORIA
                      50.000000%      .03125 x .875 to .750             FORMATION:
            William G. Helis Estate   Sliding Scale (.02734380)
                      50.000000%                                         William G. Helis Estate
                                                                                    50.000000%    
                                                                         Goliad Partners, L. P.   
                                                                                    15.625000%    
                                                                         Sid R. Bass, Inc.        
                                                                                     9.375000%    
                                                                         Keystone, Inc.           
                                                                                     9.375000%    
                                                                         Thru Line Inc.           
                                                                                     9.375000%    
                                                                         Perry R. Bass, Inc.      
                                                                                     6.250000%    
                                                                                    ----------
                                                                         BELOW BASE OF PHOSPHORIA 
                                                                         FORMATION:               
                                                                                                  
                                                                         William C. Helis Estate  
                                                                                    50.000000%    
                                                                         Amoco Production Company 
                                                                                    25.000000%    
                                                                         Goliad Partners, L. P.  
                                                                                     7.812500%    
                                                                         Sid R. Bass, Inc.        
                                                                                     4.687500%    
                                                                         Keystone, Inc.           
                                                                                     4.687500%  
</TABLE>


<PAGE>
                                                               Page 11 of 23

             EXHIBIT A-2  PURCHASE AND SALE AGREEMENT DATED _________, 1998   

                                 REVISED EXHIBIT B
                                  JANUARY 1, 1998
         ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
   AND OPERATION OF THE COTTONWOOD CREEK FIELD EXTENSION (PHOSPHORIA) UNIT AREA
                              WASHAKIE COUNTY, WYOMING
<TABLE>
<CAPTION>
TRACT                                      NO.                                       ROYALTY OWNER 
 NO.    DESCRIPTION OF LAND               ACRES               SERIAL NUMBER          & PERCENTAGE  
- ---------------------------------------------------------------------------------------------------
<S>  <C>                                  <C>           <C>                            <C>
        FEDERAL LANDS (CONT'D)

18   TOWNSHIP 47 NORTH, RANGE 91 WEST                       USA W-0325328                U.S.A.
     Section 25: S/2                      320.00                 HBP                      100%
                                                         Bass Leases 33384 and
                                                               39040          

19   TOWNSHIP 46 NORTH, RANGE 90 WEST                       USA W-0168275                  U.S.A.
     Section 6: Lots 10, 11, and 13        82.60                HBP                         100%
                                                            Bass Leases 33357, 33397,
                                                                34270, and 38353

<CAPTION>
TRACT        LESSEE OF RECORD          OVERRIDING ROYALTY                    WORKING INTEREST            
 NO.           & PERCENTAGE             & DECIMAL INTEREST                     & PERCENTAGE              
- ---------------------------------------------------------------------------------------------------------
<S>         <C>                       <C>                                  <C>
                                                                           Thru Line Inc.               
                                                                                     4.687500%        
                                                                           Perry R. Bass, Inc.
                                                                                     3.125000%
                                                                                     ******      
18             Goliad Partners, L. P.        None                          Goliad Partners, L. P. 
                        41.156750%                                                  41.156750%  
               Sid R. Bass, Inc.                                           Sid R. Bass, Inc.    
                         18.750000%                                                 18.750000%  
               Keystone, Inc.                                              Keystone, Inc.       
                         18.750000%                                                 18.750000%  
               Thru Line Inc.                                              Thru Line Inc.       
                         18.750000%                                                 18.750000%  
               Perry R. Bass, Inc.                                         Perry R. Bass, Inc.  
                          2.593250%                                                  2.593250%  
                            ******                                                     ******

19             Goliad Partners, L. P.    Elaine Wolf                       Goliad Partners, L. P. 
                        31.250000%                 .03000000                       34.375000%  
               Sid R. Bass, Inc.         Allagesh Oil Company              Sid R. Bass, Inc.   
                        18.750000%                 .00666670                       18.750000%  
               Keystone, Inc.            Lakeview Oil Company              Keystone, Inc.      
                        18.750000%                 .00618750                       18.750000%  
               Thru Line Inc.            T-Bar Oil & Gas, Ltd.             Thru Line Inc.      
                        18.750000%                 .00425000                       18.750000%  
               Perry R. Bass, Inc.       Sims Properties                   Perry R. Bass, Inc. 
                        12.500000%                 .00333330                        9.375000%  
                                         Harry M. Perry                                        
                                                   .00206250                                   
</TABLE>
<PAGE>
                                                               Page 12 of 23

            EXHIBIT A-2  PURCHASE AND SALE AGREEMENT DATED _________, 1998   

                                 REVISED EXHIBIT B
                                  JANUARY 1, 1998
         ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
   AND OPERATION OF THE COTTONWOOD CREEK FIELD EXTENSION (PHOSPHORIA) UNIT AREA
                             WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                                       ROYALTY OWNER 
 NO.    DESCRIPTION OF LAND               ACRES               SERIAL NUMBER          & PERCENTAGE  
- ---------------------------------------------------------------------------------------------------
<S>  <C>                                  <C>      <C>                               <C>
       FEDERAL LANDS (CONT'D)

19   TOWNSHIP 46 NORTH, RANGE 90 WEST      35.82            USA W-079516                U.S.A.
     Section 6: Lot 12                                          HBP                      100%
                                                       Bass Leases 33356, 33396,
                                                          34272, and 38355
                                                                                   
                                                                                   
     Total Tract 19                       118.42   (Communitization Agreement NW - 348)

20   TOWNSHIP 46 NORTH, RANGE 90 WEST                         USA W-079516               U.S.A.
     Section 6: Lot 18                     40.00                  HBP                     100%
                                                        Bass Leases 33356, 33396,
                                                           34272, and 38355

<CAPTION>
TRACT        LESSEE OF RECORD          OVERRIDING ROYALTY                    WORKING INTEREST            
 NO.           & PERCENTAGE             & DECIMAL INTEREST                     & PERCENTAGE              
- ---------------------------------------------------------------------------------------------------------
<S>         <C>                       <C>                               <C>
19            Goliad Partners, L. P.      Lakeview Oil Company            Goliad Partners, L. P.
                          34.375000%                 .00618750                       34.375000%
              Sid R. Bass, Inc.           T-Bar Oil & Gas, Ltd.           Sid R. Bass, Inc.
                          18.750000%                 .00425000                       18.750000%
              Keystone, Inc.              Jerome B. Guinand               Keystone, Inc.
                          18.750000%                 .00350000                       18.750000%
              Thru Line Inc.              Allagesh Oil Company            Thru Line Inc.
                          18.750000%                 .00333330                       18.750000%
              Perry R. Bass, Inc.         Eunice D. Lowe                  Perry R. Bass, Inc.
                           9.375000%                 .00250000                        9.375000%
                                          Kearns-Tribune Investments Inc.
                                                     .01575000
                                          Paul T. Walton  1990 Revocable 
                                            Trust    .01575000
                                          Mary L. Tuttle Hagstrom
                                                     .00250000
                                          Harry M. Perry
                                                     .00206250
                                          Sims Properties
                                                     .00166670

20            Goliad Partners, L. P.      Helen E. Walton                   Goliad Partners, L. P.
                          34.375000%                 .03150000                       34.375000%
              Sid R. Bass, Inc.           Lakeview Oil Company              Sid R. Bass, Inc.
                          18.750000%                 .00618750                       18.750000%
              Keystone, Inc.              T-Bar Oil & Gas, Ltd.             Keystone, Inc.
                          18.750000%                 .00425000                       18.750000%
              Thru Line Inc.              Jerome S. Guinand                 Thru Line Inc.
                          18.750000%                 .00350000                       18.750000%
</TABLE>

<PAGE>
                                                               Page 13 of 23

         EXHIBIT A-2 PURCHASE AND SALE AGREEMENT DATED _________, 1998   
                                                                             
                              REVISED EXHIBIT B                              
                              JANUARY 1, 1998                                
      ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT      
AND OPERATION OF THE COTTONWOOD CREEK FIELD EXTENSION (PHOSPHORIA) UNIT AREA
                          WASHAKIE COUNTY, WYOMING                           

<TABLE>
<CAPTION>

TRACT                                        NO.                             ROYALTY OWNER  
 NO.    DESCRIPTION OF LAND                ACRES       SERIAL NUMBER          & PERCENTAGE   
- ----------------------------------------------------------------------------------------------
<S>     <C>                                <C>    <C>                         <C>

     FEDERAL LANDS (CONT'D)

                                                                               

20   TOWNSHIP 46 NORTH, RANGE 90 WEST      36.00      USA W-079516-A             U.S.A.
     Section 6: Lot 19                                      HBP                   100%
                                                  Bass Leases 33358, 33398,
                                                    34273, and 38356




<CAPTION>
                                                                               
TRACT    LESSEE OF RECORD          OVERRIDING ROYALTY                WORKING INTEREST
 NO.       & PERCENTAGE            & DECIMAL INTEREST                  & PERCENTAGE 
- -------------------------------------------------------------------------------------------
<S>      <C>                       <C>                              <C>
                                                                                            
                                                                                            
20       Perry R. Bass, Inc.       Allagesh Oil Company              Perry R. Bass, Inc.    
                     9.375000%                  .00333330                        9.375000%  
                                   Eunice D. Lowe                                           
                                                .00250000                                   
                                   Mary L. Tuttle Hagstrom                                  
                                                .00250000                                   
                                   Harry M. Perry                                           
                                                .00206250                                   
                                   Sims Properties                                          
                                                .00166670                                   
                                                ---------
         Goliad Partners, L. P.    Helen E. Walton                   Goliad Partners, L. P. 
                     34.375000%                 .03150000                       34.375000%  
         Sid R. Bass, Inc.         Lakeview Oil Company              Sid R. Bass, Inc.      
                     18.750000%                 .00618750                       18.750000%  
         Keystone, Inc.            T-Bar Oil & Gas, Ltd.             Keystone, Inc.         
                     18.750000%                 .00425000                       18.750000%  
         Thru Line Inc.            Jerome B. Guinand                 Thru Line Inc.         
                     18.750000%                 .00350000                       18.750000%  
         Perry R. Bass, Inc.       Allagesh Oil Company              Perry R. Bass, Inc.    
                      9.375000%                 .00333330                        9.375000%  
                                   Eunice D. Lowe                                           
                                                .00250000                                   
                                   Mary L. Tuttle Hagstrom                                  
                                                .00250000                                   
                                   Harry M. Perry                                           
                                                .00206250                                   
                                   Sims Properties                                          
                                                .00166670                                   
</TABLE>


<PAGE>
                                                               Page 14 of 23

          EXHIBIT A-2 PURCHASE AND SALE AGREEMENT DATED _________, 1998   

                             REVISED EXHIBIT B
                              JANUARY 1, 1998
     ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
AND OPERATION OF THE COTTONWOOD CREEK FIELD EXTENSION (PHOSPHORIA) UNIT AREA
                         WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                         NO.                         ROYALTY OWNER  
 NO.    DESCRIPTION OF LAND                  ACRES       SERIAL NUMBER    & PERCENTAGE   
- ---------------------------------------------------------------------------------------
<S>     <C>                                  <C>     <C>                  <C>

        FEDERAL LANDS (CONT'D)

       
20      TOWNSHIP 46 NORTH, RANGE 90 WEST      36.17       USA W-0168275       U.S.A.
        Section 6: Lot 20                                      HBP             100%
                                                    Bass Leases 33357, 33397,       
                                                       34270, and 38353             








20      TOWNSHIP 46 NORTH, RANGE 90 WEST      40.00     USA W-098502-A        U.S.A.
        Section 6: SE/4NW/4                                   HBP              100%
                                                    Bass Leases 33359, 33399,
                                                       34274, and 38354







        Total Tract 20                       152.17    (Communitization
                                                      Agreement NW-351)

21      TOWNSHIP 47 NORTH, RANGE 90 WEST                   USA W-11767        U.S.A.
        Section 32: NE/4SW/4                  40.00            HBP             100%
                                                        Bass Lease 33514




<CAPTION>

TRACT    LESSEE OF RECORD           OVERRIDING ROYALTY                WORKING INTEREST
 NO.       & PERCENTAGE             & DECIMAL INTEREST                   & PERCENTAGE 
- ------------------------------------------------------------------------------------------
<S>    <C>                        <C>                               <C>
       
       
20      Goliad Partners, L. P.    Elaine Wolf                       Goliad Partners, L. P.
                    31.250000%                 .03000000                       34.375000% 
        Sid R. Bass, Inc.         Allagesh Oil Company              Sid R. Bass, Inc.
                    18.750000%                 .00666670                       18.750000% 
        Keystone, Inc.            Lakeview Oil Company              Keystone, Inc.        
                    18.750000%                 .00618750                       18.750000% 
        Thru Line Inc.            Sims Properties                   Thru Line Inc.        
                    18.750000%                 .00333330                       18.750000% 
        Perry R. Bass, Inc.       Harry M. Perry                    Perry R. Bass, Inc.   
                    12.500000%                 .00206250                        9.375000% 
                                  T-Bar Oil & Gas, Ltd.                                   
                                               .00425000                                  
                                               ---------
        Goliad Partners, L. P.    Zena H. Andrews Estate            Goliad Partners, L. P.
                    34.375000%                 .03000000                       34.375000% 
        Sid R. Bass, Inc.         Allagesh Oil Company              Sid R. Bass, Inc.   
                    18.750000%                 .00666670                       18.750000% 
        Keystone, Inc.            Lakeview Oil Company              Keystone, Inc.        
                    18.750000%                 .00618750                       18.750000% 
        Thru Line Inc.            T-Bar Oil & Gas, Ltd.             Thru Line Inc.        
                    18.750000%                 .00425000                       18.750000% 
        Perry R. Bass, Inc.       Sims Properties                   Perry R. Bass, Inc.   
                     9.375000%                 .00333330                        9.375000% 
                                  Harry M. Perry                                          
                                               .00206250                                  
                                              ----------
                                                                                          
        Amoco Production Company     Perry R. Bass, Inc.            SURFACE TO BASE OF PHOSPHORIA 
                    50.000000%                 .01562500            FORMATION: 
        William G. Helis Estate        Sid R. Bass, Inc.
                    50.000000%                 .01171875
</TABLE>


<PAGE>
                                                               Page 15 of 23

        EXHIBIT A-2 PURCHASE AND SALE AGREEMENT DATED _________, 1998   

                         REVISED EXHIBIT B 
                           JANUARY 1, 1998 
  ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT             
AND OPERATION OF THE COTTONWOOD CREEK FIELD EXTENSION (PHOSPHORIA) UNIT AREA
                  WASHAKIE COUNTY, WYOMING                                      

<TABLE>
<CAPTION>

TRACT                                      NO.                         ROYALTY OWNER                  
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER    & PERCENTAGE                   
- -------------------------------------------------------- ------------------------------
<S>    <C>                                <C>         <C>              <C>

       FEDERAL LANDS (CONT'D)      




       * Bass and Amoco have no
         working interest in this Tract
         until Well #27-32 pays out.


<CAPTION>

TRACT  LESSEE OF RECORD        OVERRIDING ROYALTY                WORKING INTEREST
 NO.     & PERCENTAGE          & DECIMAL INTEREST                  & PERCENTAGE 
- -----------------------------------------------------------------------------------------
<S>   <C>                   <C>                               <C>
      
                            Lee M. Bass, Inc.                 William G. Helis Estate
                                         .01171875                    50.000000%     
                            Keystone, Inc.                    Goliad Partners, L. P.
                                         .01171875                    15.625000% *  
                            Thru Line Inc.                    Sid R. Bass, Inc.     
                                         .01171875                     9.375000% *  
                                                              Keystone, Inc.        
                                                                       9.375000% *  
                                                              Thru Line Inc.        
                                                                       9.375000% * 
                                                              Perry R. Bass, Inc.   
                                                                       6.2500000% * 
                                                                       -----------
                                                              BELOW BASE OF PHOSPHORIA  
                                                              FORMATION:

                                                              William G. Helis Estate
                                                                      50.000000%     
                                                              Amoco Production Company
                                                                      25.000000% *  
                                                              Goliad Partners, L. P. 
                                                                       7.812500% * 
                                                              Sid R. Bass, Inc.    
                                                                       4.687500% * 
                                                              Keystone, Inc.       
                                                                       4.687500% * 
                                                              Thru Line Inc.       
                                                                       4.687500% * 
                                                              Perry R. Bass, Inc.  
                                                                       3.125000% * 

</TABLE>

<PAGE>
                                                               Page 16 of 23

           EXHIBIT A-2 PURCHASE AND SALE AGREEMENT DATED _________, 1998    

                               REVISED EXHIBIT B
                               JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
 AND OPERATION OF THE COTTONWOOD CREEK FIELD EXTENTION (PHOSPHORIA) UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                         ROYALTY OWNER  
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER    & PERCENTAGE   
- --------------------------------------------------------------------------------------
<S>  <C>                                  <C>       <C>                <C>

       FEDERAL LANDS (CONT'D)

21   TOWNSHIP 47 NORTH, RANGE 90 WEST     120.00       USA W-7871          U.S.A.
     Section 32: NW/4SW/4, S/2SW/4                          HBP             100% 
                                                    Bass Lease 33512    


















    *Bass and Amoco have no
     working interest in this Tract 
     until Well #27-32 pays out.



<CAPTION>

TRACT   LESSEE OF RECORD        OVERRIDING ROYALTY                 WORKING INTEREST
 NO.     & PERCENTAGE           & DECIMAL INTEREST                   & PERCENTAGE
- -------------------------------------------------------------------------------------------------
<S>    <C>                      <C>                               <C>

       Amoco Production Company  Audrey L. Foster Trust            SURFACE TO BASE OF PHOSPHORIA
                   50.000000%                 .01500000            FORMATION: 
       William G. Helis Estate   Helen D. McVey 
                   50.000000%                 .01500000            William G. Helis Estate      
                                 Perry R. Bass, Inc.                        50.000000%
                                              .00812500            Goliad Partners, L. P.       
                                 Sid R. Bass, Inc.                          15.625000% *
                                              .00609375            Sid R. Bass, Inc.    
                                 Lee M. Bass, Inc.                           9.375000% *
                                              .00609375            Keystone, Inc.       
                                 Keystone, Inc.                              9.375000% *
                                              .00609375            Thru Line Inc.       
                                 Thru Line Inc.                              9.375000% *
                                              .00609375            Perry R. Bass, Inc.  
                                                                             6.250000%  
                                                                             ---------
                                                                   BELOW BASE OF PHOSPHORIA 
                                                                   FORMATION:

                                                                   William G. Helis Estate 
                                                                            50.000000% 
                                                                   Amoco Production Company 
                                                                            25.000000% * 
                                                                   Goliad Partners, L. P. 
                                                                             7.812500% *
                                                                   Sid R. Bass, Inc. 
                                                                             4.687500% *
                                                                   Keystone, Inc.
                                                                             4.687500% *
</TABLE>




<PAGE>
                                                               Page 17 of 23

            EXHIBIT A-2  PURCHASE AND SALE AGREEMENT DATED _________, 1998  

                               REVISED EXHIBIT B
                               JANUARY 1, 1998
          ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
 AND OPERATION OF THE COTTONWOOD CREEK FIELD EXTENSION (PHOSPHORIA) UNIT AREA
                           WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                         ROYALTY OWNER  
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER    & PERCENTAGE   
- --------------------------------------------------------------------------------------
<S>  <C>                                  <C>         <C>              <C>

       FEDERAL LANDS (CONT'D)







     Total Tract 21                       160.00      (Communitization
                                                      Agreement NW - 434)

22   TOWNSHIP 47 NORTH, RANGE 90 WEST                 USA W-1 1765          U.S.A.
     Section 32: N/2NW/4                   80.00            HBP              100%
                                                      Bass Lease 33511



<CAPTION>

TRACT     LESSEE OF RECORD           OVERRIDING ROYALTY                 WORKING INTEREST
 NO.       & PERCENTAGE              & DECIMAL INTEREST                   & PERCENTAGE       
- -------------------------------------------------------------------------------------------------------
<S>    <C>                          <C>                               <C>

                                                                      Thru Line Inc.            
                                                                                4.687500% *     
                                                                      Perry R. Bass, Inc.       
                                                                               3.125000% *    
                                                                                * * * * * *
     


        Amoco Production Company    G E O Exploration Inc.            SURFACE TO BASE OF PHOSPHORIA
                    50.000000%      .03125 x .875 to .750             FORMATION:
        William G. Helis Estate     Sliding Scale (.02734375)
                    50.000000%                                        William G. Helis Estate
                                                                                 50.000000%
                                                                      Goliad Partners, L. P.
                                                                                 15.625000%
                                                                      Sid R. Bass, Inc.
                                                                                  9.375000%
                                                                      Keystone, Inc.       
                                                                                  9.375000%
                                                                      Thru Line Inc.       
                                                                                  9.375000%
                                                                      Perry R. Bass, Inc.  
                                                                                 6.250000% 
                                                                                 ---------
                                                                      BELOW BASE OF PHOSPHORIA
                                                                      FORMATION:
     
                                                                      William G. Helis Estate
                                                                                 50.000000%
                                                                      Amoco Production Company
                                                                                 25.000000%
                                                                      Goliad Partners, L. P.
                                                                                  7.812500%
     
</TABLE>


<PAGE>
                                                               Page 18 of 23

         EXHIBIT A-2  PURCHASE AND SALE AGREEMENT DATED _________, 1998    

                             REVISED EXHIBIT B
                             JANUARY 1, 1998
     ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
 AND OPERATION OF THE COTTONWOOD CREEK FIELD EXTENSION (PHOSPHORIA) UNIT AREA
                         WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                         ROYALTY OWNER   
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER    & PERCENTAGE    
- ---------------------------------------------------------------------------------------
<S>     <C>                               <C>         <C>              <C>
       FEDERAL LANDS (CONT'D)                                                          







                                                                                       
22   TOWNSHIP 47 NORTH, RANGE 90 WEST      80.00      USA W-0134988-B      U.S.A.
     Section 32: S/2NW/4                                    HBP             100%
                                                    Bass Lease 33352                   







     Total Tract 22                       160.00   (Communitization                    
                                                   Agreement NW - 461)                 
                                                                                       
23   TOWNSHIP 47 NORTH, RANGE 90 WEST                 USA W-0254680-A      U.S.A.
     Section 31: S/2NE/4                   80.00            HBP             100%
                                                 Bass Leases 33351, 33393,
                                                    34271, and 38351



<CAPTION>


TRACT   LESSEE OF RECORD             OVERRIDING ROYALTY                   WORKING INTEREST
  NO.     & PERCENTAGE               & DECIMAL INTEREST                    & PERCENTAGE
- ------------------------------------------------------------------------------------------
<S>   <C>                          <C>                                  <C>

                                                                        Sid R. Bass, Inc.
                                                                                    4.687500%
                                                                        Keystone, Inc.       
                                                                                    4.687500%
                                                                        Thru Line Inc.       
                                                                                    4.687500%
                                                                        Perry R. Bass, Inc.  
                                                                                    3.125000%
                                                                                    ----------
      Goliad Partners, L. P.       A. M. Culver Company                 Goliad Partners, L. P.
                  31.250000%                    .04000000                           31.250000% 
      Sid R. Bass, Inc.                                                 Sid R. Bass, Inc.
                  18.750000%                                                        18.750000% 
      Keystone, Inc.                                                    Keystone, Inc.
                  18.750000%                                                        18.750000%
      Thru Line Inc.                                                    Thru Line Inc.
                  18.750000%                                                        18.750000%
      Perry R. Bass, Inc.                                               Perry R. Bass, Inc.
                  12.500000%                                                        12.500000% 
                 * * * * * *                                                        * * * * * *
     
     


      Goliad Partners, L. P.       Allagesh Oil Company                 Goliad Partners, L. P.
                 31.250000%                    .00750000                            34.375000%
      Sid R. Bass, Inc.            E. E. Engleman                       Sid R. Bass, Inc.    
                 18.750000%                    .00750000                            18.750000%
      Keystone, Inc.               Sims Properties                      Keystone, Inc.       
                 18.750000%                    .00750000                            18.750000%
      Thru Line Inc.               Lakeview Oil Company                 Thru Line Inc.       
                 18.750000%                    .00652500                            18.750000%
      Perry R. Bass, Inc.          Robert J. Connaghan                  Perry R. Bass, Inc.  
                 12.500000%                    .00500000                             9.375000%

</TABLE>

<PAGE>
                                                               Page 19 of 23

   EXHIBIT A-2 PURCHASE AND SALE AGREEMENT DATED _________, 1998   

                              REVISED EXHIBIT B
                              JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
   AND OPERATION OF THE COTTONWOOD CREEK FIELD EXTENSION (PHOSPHORIA) UNIT AREA
                            WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                         ROYALTY OWNER 
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER    & PERCENTAGE  
- -------------------------------------------------------------------------------------
<S>  <C>                                  <C>       <C>                <C>     
       FEDERAL LANDS (CONT'D)






23   TOWNSHIP 47 NORTH, RANGE 90 WEST      40.00       USA W-0325327   U.S.A.  
     Section 31: NW/4NE/4                                   HBP          100%  
                                                    Bass Lease 33510           









<CAPTION>

TRACT   LESSEE OF RECORD            OVERRIDING ROYALTY               WORKING INTEREST
 NO.     & PERCENTAGE               & DECIMAL INTEREST                 & PERCENTAGE
- -------------------------------------------------------------------------------------------------------
<S>     <C>                        <C>                               <C>

                                   T-Bar Oil & Gas, Ltd.    
                                                .00425000  
                                   Harry M. Perry          
                                                .00217500  
                                                ------------
         Amoco Production Company  G E O Exploration Inc.            SURFACE TO BASE OF PHOSPHORIA
                     50.000000%    .03125 x .875 to .750             FORMATION:
         William G. Helis Estate   Sliding Scale (.02734375)                                                            
                     50.000000%                                      William G. Helis Estate
                                                                                50.000000%
                                                                     Goliad Partners, L. P.
                                                                                15.625000%
                                                                     Sid R. Bass, Inc.
                                                                                 9.375000%
                                                                     Keystone, Inc.
                                                                                 9.375000%
                                                                     Thru Line Inc.
                                                                                 9.375000%
                                                                     Perry R. Bass, Inc. 
                                                                                6.250000%
                                                                                ---------
                                                                     BELOW BASE OF PHOSPHORIA
                                                                     FORMATION:
     
                                                                     William G. Helis Estate
                                                                                50.000000%
                                                                     Amoco Production Company
                                                                                25.000000%
                                                                     Goliad Partners, L. P.
                                                                                 7.812500%
</TABLE>

<PAGE>
                                                                Page 20 of 23

          EXHIBIT A-2  PURCHASE AND SALE AGREEMENT DATED _________, 1998   

                                 REVISED EXHIBIT B
                                  JANUARY 1, 1998
          ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
   AND OPERATION OF THE COTTONWOOD CREEK FIELD EXTENSION (PHOSPHORIA) UNIT AREA
                              WASHAKIE COUNTY, WYOMING


<TABLE>
<CAPTION>

TRACT                                     NO.                             ROYALTY OWNER 
 NO.  DESCRIPTION OF LAND               ACRES       SERIAL NUMBER         & PERCENTAGE  
- ------------------------------------------------------------------------------------------
<S>   <C>                              <C>         <C>                   <C>
      FEDERAL LANDS (CONT'D)

                                                                                     
                                                                                     
                                                                                     
                                                                                     

23    TOWNSHIP 47 NORTH, RANGE 90 WEST     40.00     USA W-11765              U.S.A.
      Section 31: NE/4NE/4                                HBP                  100%
                                                    Bass Lease 33511                 
                                                                                     
                                                                                     
                                                                                     
                                                                                     
<CAPTION>                                                                                     
                                                                                     
TRACT    LESSEE OF RECORD        OVERRIDING ROYALTY          WORKING INTEREST                      
 NO.     & PERCENTAGE           & DECIMAL INTEREST            & PERCENTAGE                         
- -----------------------------------------------------------------------------------------------    
<S>   <C>                       <C>                          <C>

                                                             Sid R. Bass, Inc.
                                                                       4.687500%
                                                             Keystone, Inc.
                                                                       4.687500%
                                                             Thru Line Inc.
                                                                       4.687500%
                                                             Perry R. Bass, Inc.
                                                                       3.125000%
                                                                       ----------
                                                                                             
23    Amoco Production Company  G E O Exploration Inc.       SURFACE TO BASE OF PHOSPHORIA    
                50.000000%      .03125 x .875 to .750        FORMATION:                                
      William G. Helis Estate   Sliding Scale (.02734375)                                          
                50.000000%                                   William G. Helis Estate            
                                                                           50.000000%              
                                                             Goliad Partners, L.P.
                                                                           15.625000%              
                                                             Sid R. Bass, Inc.                  
                                                                            9.375000%              
                                                             Keystone, Inc.                     
                                                                            9.375000%              
                                                             Thru Line Inc.                     
                                                                            9.375000%              
                                                             Perry R. Bass, Inc.                
                                                                            6.250000%              
                                                                           ---------
                                                                                                   
                                                             BELOW BASE OF PHOSPHORIA           
                                                             FORMATION:                         

</TABLE>

<PAGE>
                                                                Page 21 of 23

          EXHIBIT A-2  PURCHASE AND SALE AGREEMENT DATED _________, 1998   

                                 REVISED EXHIBIT B
                                  JANUARY 1, 1998
        ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
  AND OPERATION OF THE COTTONWOOD CREEK FIELD EXTENSION (PHOSPHORIA) UNIT AREA
                            WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO.                         ROYALTY OWNER
 NO.    DESCRIPTION OF LAND               ACRES       SERIAL NUMBER    & PERCENTAGE
- --------------------------------------------------------------------------------------
<S>     <C>                               <C>         <C>              <C>
        FEDERAL LANDS (CONT'D)





















Total Tract 23                       160.00            (Communitization Agreement NW - 474)

                                                                                                 

23 FEDERAL TRACTS   3,318.87 ACRES OR 89.24404% OF THE UNIT AREA


<CAPTION>

TRACT   LESSEE OF RECORD        OVERRIDING ROYALTY          WORKING INTEREST                                                      
 NO.    & PERCENTAGE           & DECIMAL INTEREST            & PERCENTAGE                                                          
- ---------------------------------------------------------------------------------------                                            
<S>     <C>                    <C>                        <C>
        
23                                                        William G. Helis Estate
                                                                     50.000000%
                                                          Amoco Production Company
                                                                     25.000000%
                                                          Goliad Partners, L.P.
                                                                      7.812500%
                                                          Sid R. Bass, Inc.
                                                                      4.687500%
                                                          Keystone, Inc.
                                                                      4.687500%
                                                          Thru Line Inc.
                                                                      4.687500%
                                                          Perry R. Bass, Inc.
                                                                      3.125000%

</TABLE>


<PAGE>
                                                               Page 22 of 23

          EXHIBIT A-2   PURCHASE AND SALE AGREEMENT DATED _________, 1998   

                                   REVISED EXHIBIT B
                                    JANUARY 1, 1998
         ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
   AND OPERATION OF THE COTTONWOOD CREEK FIELD EXTENSION (PHOSPHORIA) UNIT AREA
                              WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                    NO.                            ROYALTY OWNER 
 NO.  DESCRIPTION OF LAND               ACRES       SERIAL NUMBER        & PERCENTAGE  
- -----------------------------------------------------------------------------------------
<S>  <C>                                <C>         <C>                 <C>
     STATE LANDS

24   TOWNSHIP 47 NORTH, RANGE 91 WEST                 WYO-66-12831          State of Wyo.  
     Section 36: E/2                     320.00          HBP                    100%        
                                                    Bass Lease 33383                 
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     

25   TOWNSHIP 47 NORTH, RANGE 91 WEST                 WYO-70-5767           State of Wyo.    
     Section 36: N/2NW/4                  80.00         HBP                     100%        
                                                    Bass Leases 21328 and             
     (Part of lands in lease fall                       38853                         
     outside of Unit Outline.)                                                                  


<CAPTION>

TRACT   LESSEE OF RECORD        OVERRIDING ROYALTY               WORKING INTEREST                        
 NO.    & PERCENTAGE           & DECIMAL INTEREST                 & PERCENTAGE                            
- ----------------------------------------------------------------------------------------
<S>  <C>                       <C>                              <C>
                                                                                        
24   WPH-GP, Inc.               Karel Untermeyer                 WPH-GP, Inc.           
               31.250000%                 .05000000                       31.250000%    
     Sid R. Bass, Inc.                                           Sid R. Bass, Inc.      
               18.750000%                                                 18.750000%    
     Keystone, Inc.                                              Keystone, Inc.         
               18.750000%                                                 18.750000%    
     Thru Line Inc.                                              Thru Line Inc.         
               18.750000%                                                 18.750000%    
     Perry R. Bass, Inc.                                         Perry R. Bass, Inc.    
               12.500000%                                                 12.500000%    
               * * * * * * *                                              * * * * * * *
25   WPH-GP, Inc.              Perry R. Bass, Trustee            WPH-GP, Inc.           
               43.750000%                 .00937500                       43.750000%    
     Sid R. Bass, Inc.         Sid R. Bass, Inc.                 Sid R. Bass, Inc.      
               18.750000%                 .00703125                       18.750000%  
     Keystone, Inc.            Lee M. Bass, Inc.                 Keystone, Inc.         
               18.750000%                 .00703125                       18.750000%    
     Thru Line Inc.            Keystone, Inc.                    Thru Line Inc.         
               18.750000%                 .00703125                       18.750000%    
                               Thru Line Inc.                                           
                                          .00703125                                     
                               Robert W. Scott                                          
                                          .00660000                                     
                               Lester Stanley Estate                                    
                                          .00660000                                     
                               Dorothy M. Vail and                                      
                               Donald Vail                                              
                                          .00500000                                     
                               Warren D. Driskell Estate                                
                                          .00160000

</TABLE>

<PAGE>
                                                                Page 23 of 23

       EXHIBIT A-2   PURCHASE AND SALE AGREEMENT DATED _________, 1998   

                             REVISED EXHIBIT B
                              JANUARY 1, 1998
     ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
  AND OPERATION OF THE COTTONWOOD CREEK FIELD EXTENSION (PHOSPHORIA) UNIT AREA
                           WASHAKIE COUNTY, WYOMING


<TABLE>
<CAPTION>

TRACT                                    NO.                         ROYALTY OWNER 
 NO. DESCRIPTION OF LAND               ACRES       SERIAL NUMBER    & PERCENTAGE   
- -----------------------------------------------------------------------------------
<S>  <C>                              <C>          <C>              <C>            
     STATE LANDS (CONT'D)

                                                                                   
                                                                                   



2 STATE TRACTS                          400.00 ACRES OR 10.75596% OF THE UNIT AREA



TOTAL UNIT - 25 TRACTS                          3,718.87 ACRES


<CAPTION>

TRACT LESSEE OF RECORD        OVERRIDING ROYALTY              WORKING INTEREST
 NO.   & PERCENTAGE           & DECIMAL INTEREST                & PERCENTAGE
- --------------------------------------------------------------------------------
<S>  <C>                     <C>                               <C>
                                                                                
                                                               
25                             Sam T. Boltz, Jr.                 
                                            .00140000           
                               Eugene A. O'Brien                
                                            .00140000           
                               O. L. Rickard                    
                                            .00140000           
                               Monty M. Brosious                
                                            .00036800           
                               J. Paul Mathias                  
                                            .00031600           
                               Willard J. Pearson, Jr. Estate   
                                            .00031600           
</TABLE>
<TABLE>
<CAPTION>
                            R E C A P I T U L A T I O N

                       LAND               ACRES       PERCENTAGE
                       ----               -----       ----------
                       <S>              <C>           <C>
                       Federal          3,318.87         89.24%
                       State              400.00         10.76%
                       Patented                0              0
                                        --------        -------
                       TOTAL            3,718.87        100.00%
                                        --------        -------
                                        --------        -------

</TABLE>


<PAGE>
                                                                  Page 1 of 7
       EXHIBIT A-3  PURCHASE AND SALE AGREEMENT DATED ____________, 1998

                              REVISED EXHIBIT B
                               JANUARY 1, 1998
      ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
                   AND OPERATION OF THE NO WATER CREEK UNIT
                           WASHAKIE COUNTY, WYOMING



<TABLE>
<CAPTION>

TRACT                                                 NO.                           ROYALTY OWNER      
 NO.       DESCRIPTION OF LAND                      ACRES       SERIAL NUMBER        & PERCENTAGE      
- -------------------------------------------------------------------------------------------------------
<S>    <C>                                         <C>        <C>                   <C>

           FEDERAL LANDS

1      TOWNSHIP 47 NORTH, RANGE 91 WEST                            B-039524             U.S.A.         
       Section 32: SW/4                            160.00       01/31/58 (HBP)            All          
                                                              Bass Leases 31100,                       
NOTE:  This tract is not committed to Unit.                    31529, and 34084                        
                                                                                                       
       (Part of lease falls outside Unit Outline)                                                      
                                                                                                       






                                                                                                        
                                                                                                        
                                                                                                        
7      TOWNSHIP 47 NORTH, RANGE 91 WEST                            W-084518             U.S.A.           
       Section 31: Lot 12, E/2SW/4, SE/4           280.00       10/31/69 (HBP)            All          
                                                               Bass Lease 34082                          
       (Part of lease falls outside Unit Outline)                                                      
                                                                                                         
                                                                                                         
                                                                                                        
<CAPTION>

TRACT    LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST             
 NO.     & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE               
- ------------------------------------------------------------------------------------------------       
<S>      <C>                           <C>                                <C>
 1       Perry R. Bass, Inc.           Worland Associates                 Worland Associates     
                   25.000000%                     .05097220                           50.000000% 
         Sid R. Bass, Inc.             Cottonwood Properties              Perry R. Bass, Inc.    
                   18.750000%                     .01000000                           12.500000% 
         Lee M. Bass, Inc.             Guy R. Campbell                    Sid R. Bass, Inc.      
                   18.750000%                     .00500000                            9.375000% 
         Keystone, Inc.                Guy R. Campbell, Jr. & Co.         Lee M. Bass, Inc.      
                   18.750000%                     .00500000                            9.375000% 
         Thru Line Inc.                K&B Company                        Keystone, Inc.         
                   18.750000%                     .00050000                            9.375000% 
                                       Wheatley Oil Co.                   Thru Line Inc.         
                                                  .00500000                            9.375000% 
                                       Anna Stark                                                
                                                  .00027600                                      
                                                   ********                                      
 2       Perry R. Bass, Inc.           Arla A. Connaghan                  Perry R. Bass, Inc.    
                   25.000000%                     .01350000                           25.000000% 
         Sid R. Bass, Inc.             Barbara Fuller                     Sid R. Bass, Inc.      
                   18.750000%                     .01250000                           18.750000% 
         Lee M. Bass, Inc.             Kenneth Hurd                       Lee M. Bass, Inc.      
                   18.750000%                     .01250000                           18.750000% 
         Keystone, Inc.                Erving Wolf                        Keystone, Inc.         
                   18.750000%                     .00500000                           18.750000% 
         Thru Line Inc.                George Winston Nelson, Jr.         Thru Line Inc.         
                   18.750000%                     .00450000                           18.750000%
                                       Elizabeth V. Nelson Taylor 
                                                  .00450000
</TABLE>

<PAGE>

                                                                     Page 2 of 7

  EXHIBIT A-3  PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                 REVISED EXHIBIT B
                                  JANUARY 1, 1998
         ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
                      AND OPERATION OF THE NO WATER CREEK UNIT
                              WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                                NO.                            ROYALTY OWNER    
 NO.   DESCRIPTION OF LAND                          ACRES       SERIAL NUMBER        & PERCENTAGE    
- -----------------------------------------------------------------------------------------------------
<S>    <C>                                          <C>        <C>                  <C>
       FEDERAL LANDS (CONT'D)

 8     TOWNSHIP 46 NORTH, RANGE 91 WEST                            W-088064             U.S.A        
       Section 5: Lot 7                             22.12       04/30/70 (HBP)            All        
                                                               Bass Lease 34079                      
       (Part of lease falls outside Unit Outline)                                                    
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     

16     Parcel 2                                                   W-0198736             U.S.A.       
       TOWNSHIP 46 NORTH, RANGE 91 WEST            204.12       05/31/72 (HBP)            All        
       Section 6: Lots 8, 9,16,17, 25,                        Bass Leases 31115,
       & 28                                                    31154, and 38364                      
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     

<CAPTION>

TRACT    LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST                 
 NO.      & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE                   
- --------------------------------------------------------------------------------------------------------- 
<S>    <C>                           <C>                                <C>                   
                                                                                                         
                                                                                                         
8      Perry R. Bass, Inc.           April Ann Nelson Winter            Perry R. Bass, Inc.              
                 25.000000%                     .00450000                           25.000000%           
       Sid R. Bass, Inc.             Betty B. Shaffer                   Sid R. Bass, Inc.                
                 18.750000%                     .00300000                           18.750000%           
       Lee M. Bass, Inc.             Burton G. Lowe                     Lee M. Bass, Inc.                
                 18.750000%                     .00250000                           18.750000%           
       Keystone, Inc.                Mary L. Tuttle Hagstrom            Keystone, Inc.                   
                 18.750000%                     .00250000                           18.750000%           
       Thru Line Inc.                                                   Thru Line Inc.                   
                 18.750000%                                                         18.750000%           
                 ******                                                             ******   
16     Bridwell Oil Company          SURFACE TO BASE OF PHOSPHORIA      SURFACE TO BASE OF PHOSPHORIA    
                 100.000000%         FORMATION:                         FORMATION:                       
                                                                                                         
                                     Bridwell Oil Company               Worland Associates               
                                                .06250000                           50.000000%           
                                     (Until Payout of No. 5             *  Posse Petroleum Ltd.           
                                     No Water Creek Unit Well)                      21.500000%           
                                     (After Payout .10000000)           ** Perry R. Bass, Inc.              
                                     John J. Pedry                                   7.125000%            
                                                .02000000               ** Sid R. Bass, Inc.             
                                     Harry Ptasynski                                 5.343750%           
                                                  .01000000             ** Lee M. Bass, Inc.  
                                                  ------                            5.343750%  
                                     BELOW BASE OF PHOSPHORIA           ** Keystone, Inc.     
                                     FORMATION:                                     5.343750% 
                                                                        ** Thru Line Inc.        
                                     Harry Ptasynski                                5.343750%    
                                                  .01000000                         ------
</TABLE>
                                                      
    *  Several assignments need to be              
       filed with the BLM in order to             
       bring the ownership current.                
       Said assignments have been filed            
       in the Washakie County records.             
                                                                        
    ** Interest acquired from R. S. Brennand, Jr. Trust, Assignments Pending.


<PAGE>

                                                                     Page 3 of 7

         EXHIBIT A-3  PURCHASE AND SALE AGREEMENT DATED ___________, 1998

                                 REVISED EXHIBIT B                        
                                  JANUARY 1, 1998                         
         ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
                      AND OPERATION OF THE NO WATER CREEK UNIT            
                              WASHAKIE COUNTY, WYOMING                    

<TABLE>
<CAPTION>

TRACT                                               NO.                            ROYALTY OWNER
 NO.   DESCRIPTION OF LAND                         ACRES      SERIAL NUMBER        & PERCENTAGE
- -----------------------------------------------------------------------------------------------------
<S>    <C>                                         <C>       <C>                  <C>
       FEDERAL LANDS (CONT'D)






16     Parcel 3                                                   W-0198736             U.S.A         
       TOWNSHIP 46 NORTH, RANGE 91 WEST            120.00       05/31/72 (HBP)            All         
       Section 5: NE/4SW/4                                    Bass Leases 31115,
       Section 6: E/2SW/4                                      31154, and 38364                       







                                                                                                      
                                                                                                      


16     Parcel 4                                                   W-0198736             U.S.A.        
       TOWNSHIP 46 NORTH, RANGE 91 WEST            160.00       05/31/72 (HBP)           All          
       Section 5: Lot 15, SE/4NW/4                            Bass Leases 31115,
       Section 6: W/2SE/4                                      31154, and 38364                       



<CAPTION>

TRACT    LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST                 
 NO.      & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE                   
- ---------------------------------------------------------------------------------------------------------   
<S>     <C>                           <C>                                <C>                   

                                                                          BELOW BASE OF PHOSPORIA
                                                                          FORMATION:

                                                                          Bridwell Oil Company
                                                                                     100.000000%
                                                                                        -----
16       Bridwell Oil Company          SURFACE TO BASE OF PHOSPHORIA      SURFACE TO BASE OF PHOSPHORIA  
                   100.000000%         FORMATION:                         FORMATION:                     
                                                                                                         
                                       Bridwell Oil Company               Worland Associates             
                                       BPO:       .09000000                          100.000000%        
                                       APO:       .12500000                             ------           
                                       Harry Ptasynski                    BELOW BASE OF PHOSPHORIA       
                                                  .01000000               FORMATION: 
                                                  ------                    
                                       BELOW BASE OF PHOSPHORIA           Bridwell Oil Company           
                                       FORMATION:                                     100.000000%        
                                                                                                         
                                       Harry Ptasynski                                                   
                                                  .01000000                                              
                                                  ******                                   
                                                                                                         
         Bridwell Oil Company          SURFACE TO BASE OF PHOSPHORIA      SURFACE TO BASE OF PHOSPHORIA  
              100.000000%              FORMATION:                         FORMATION:                     
                                                                                                         
                                       Bridwell Oil Company               Perry R. Bass, Inc.            
                                       BPO:       .09000000                           25.000000%         
                                       APO:       .12500000               Sid R. Bass, Inc.              
                                       Harry Ptasynski                                18.750000%         
                                                  .01000000               Lee M. Bass, Inc.                
                                                                                      18.750000%         
</TABLE>

<PAGE>

                                                                     Page 4 of 7

          EXHIBIT A-3  PURCHASE AND SALE AGREEMENT DATED ___________, 1998 

                                 REVISED EXHIBIT B
                                  JANUARY 1, 1998
         ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
                      AND OPERATION OF THE NO WATER CREEK UNIT
                              WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                               NO.                            ROYALTY OWNER    
 NO.   DESCRIPTION OF LAND                         ACRES      SERIAL NUMBER        & PERCENTAGE    
- -----------------------------------------------------------------------------------------------------
<S>    <C>                                         <C>       <C>                  <C>
       FEDERAL LANDS (CONT'D)












18     TOWNSHIP 46 NORTH, RANGE 91 WEST                           W-0238809             U.S.A.
       Section 6: Lot 12                            24.13       01/31/73 (HBP)            All 
                                                               Bass Lease 31105               
       (Part of lease falls outside Unit Outline)                                             
                                                                                              
                                                                                              
                                                                                              
                                                                                              

23     TOWNSHIP 46 NORTH, RANGE 91 WEST                           W-0283968             U.S.A.
       Section 5: Lots 8, 9, 10, 16,               222.07       11/30/73 (HBP)            All 
       SW/4NW/4, NW/4SW/4                                      Bass Lease 34080                   
                                                                                                  
       (Part of lease falls outside Unit Outline)                                                 
                                                                                                  

<CAPTION>

TRACT    LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST                 
 NO.      & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE                   
- ---------------------------------------------------------------------------------------------------------   
<S>     <C>                           <C>                                <C>                   
                                                                           Keystone, Inc.          
                                                                                       18.750000%  
                                                                           Thru Line Inc.          
                                                                                       18.750000%  
                                                                                       ------
                                                                                                   
                                        BELOW BASE OF PHOSPHORIA           BELOW BASE OF PHOSPHORIA
                                        FORMATION:                         FORMATION:              
                                        Harry Ptasynski                    Bridwell Oil Company    
                                                   .01000000                           100.000000% 
                                                                                       ******
18        Worland Associates            Richard Altman and Co.             Worland Associates      
                    100.000000%                    .02865160                           100.000000% 
                                        Magic M&R LLC                                              
                                                   .02464038                                       
                                        F. J. Bradshaw Family Trust                                
                                                   .01134840                                       
                                        ROEC Inc.                                                  
                                                   .00114606                                       
                                                   ******                                          
23        Perry R. Bass, Inc.           A. M. Culver Company               Perry R. Bass, Inc.     
                    25.000000%                     .03000000                           25.000000%  
          Sid R. Bass, Inc.                                                Sid R. Bass, Inc.       
                    18.750000%                                                         18.750000%  
          Lee M. Bass, Inc.                                                Lee M. Bass, Inc.     
                    18.750000%                                                         18.750000%
          Keystone, Inc.                                                   Keystone, Inc.          
                    18.750000%                                                         18.750000%  
          Thru Line Inc.                                                   Thru Line Inc.        
                    18.750000%                                                         18.750000%
</TABLE>


<PAGE>
                                                                     Page 5 of 7

           EXHIBIT A-3  PURCHASE AND SALE AGREEMENT DATED ___________, 1998

                                  REVISED EXHIBIT B
                                   JANUARY 1, 1998
          ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
                       AND OPERATION OF THE NO WATER CREEK UNIT
                               WASHAKIE COUNTY, WYOMING


<TABLE>
<CAPTION>

TRACT                                              NO.                            ROYALTY OWNER    
 NO.   DESCRIPTION OF LAND                        ACRES      SERIAL NUMBER        & PERCENTAGE    
- -----------------------------------------------------------------------------------------------------
<S>    <C>                                        <C>       <C>                  <C>
       FEDERAL LANDS (CONT'D)

32     Parcel 1                                                   W-0315800             U.S.A.  
       TOWNSHIP 46 NORTH, RANGE 91 WEST            486.95       03/31/75 (HBP)            All   
       Section 6: Lots 18, 19, 20, 21, 22,                    Bass Leases 31106                 
                  23, and 24, S/2NE/4,                           and 34077                     
                  SE/4NW/4, E/2SE/4       
                                                                                                
                                                                                                
                                                                                                
                                                                                                
                                                                                                
32     Parcel 2                                                   W-0315800             U.S.A.  
       TOWNSHIP 46 NORTH, RANGE 91 WEST            167.77       03/31/75 (HBP)            All   
       Section 6: Lots 10, 11, 13, 14,                        Bass Leases 31106                 
                  & 15                                            and 34077                     
                                                                                                
                                                                                                
                                                                                                
                                                                                                
                                                                                                
                                                                                                
<CAPTION>

TRACT    LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST               
 NO.      & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE                
- ---------------------------------------------------------------------------------------------------------
<S>     <C>                           <C>                                <C>                   
32       Perry R. Bass, Inc.           None                               Perry R. Bass, Inc.    
                   25.000000%                                                         25.000000% 
         Sid R. Bass, Inc.                                                Sid R. Bass, Inc.      
                   18.750000%                                                         18.750000% 
         Lee M. Bass, Inc.                                                Lee M. Bass, Inc.      
                   18.750000%                                                         18.750000% 
         Keystone, Inc.                                                   Keystone, Inc.         
                   18.750000%                                                         18.750000% 
         Thru Line Inc.                                                   Thru Line Inc.         
                   18.750000%                                                         18.750000% 
                   ******                                                             ******   
                                                                                                      
32       Perry R. Bass, Inc.           SURFACE TO 285 FEET BELOW          SURFACE TO 285 FEET BELOW   
                   25.000000%          TOP OF PHOSPHORIA FORMATION        TOP OF PHOSPHORIA FORMATION 
         Sid R. Bass, Inc.             OR STRATIGRAPHIC EQUIVALENT:       OR STRATIQRAPHIC EQUIVALENT:
                   18.750000%                                                                         
         Lee M. Bass, Inc.             John J. Pedry                      Worland Associates          
                   18.750000%                     .02000000                           50.000000%   
         Keystone, Inc.                Perry R. Bass, Inc.                * Posse Petroleum Ltd.      
                   18.750000%                     .01250000                           21.500000%   
         Thru Line Inc.                Sid R. Bass, Inc.                  ** Perry R. Bass, Inc.      
                   18.750000%                     .00937500                            7.125000%    
                                       Lee M. Bass, Inc.                  ** Sid R. Bass, Inc.        
                                                  .00937500                            5.343750%    
                                       Keystone, Inc.                     ** Lee M. Bass, Inc.        
                                                  .00937500                            5.343750%    
                                       Thru Line Inc.                     ** Keystone, Inc.           
                                                  .00937500                            5.343750%    
                                                  ------                  ** Thru Line Inc.         
                                                                                       5.343750%  
                                                                                       ------
</TABLE>
                                               
    *  Several assignments need to be             
       filed with the BLM in order to               
       bring the ownership current.                 
       Said assignments have been filed             
       in the Washakie County records.              
                                                 
    ** Interest acquired from R. S. Brennand, Jr., Trust. Assignments Pending.
     
<PAGE>

                                                                     Page 6 of 7

           EXHIBIT A-3  PURCHASE AND SALE AGREEMENT DATED ___________, 1998

                                 REVISED EXHIBIT B
                                  JANUARY 1, 1998
         ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
                      AND OPERATION OF THE NO WATER CREEK UNIT
                              WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                              NO.                            ROYALTY OWNER    
 NO.   DESCRIPTION OF LAND                        ACRES      SERIAL NUMBER        & PERCENTAGE    
- -----------------------------------------------------------------------------------------------------
<S>    <C>                                        <C>       <C>                  <C>

       FEDERAL LANDS (CONT'D)
                                                                                                       
                                                                                                       
                                                                                                       

                                                                                                       
                                                                                                       
                                                                                                       
                                                                                                       
                                                                                                       
                                                                                                       
                                                                                                       
                                                                                                       
                                                                                                       
                                                                                                       
48     TOWNSHIP 46 NORTH, RANGE 91 WEST                           W-0320416             U.S.A.         
       Section 6: Lots 26 & 27                      86.69       11/30/75 (HBP)            All          
                                                               Bass Lease 31110                        
       (Part of lease falls outside Unit Outline)                                                      
                                                                                                       
                                                                                                       
                                                                                                       

<CAPTION>

TRACT    LESSEE OF RECORD                 OVERRIDING ROYALTY                 WORKING INTEREST               
 NO.      & PERCENTAGE                    & DECIMAL INTEREST                   & PERCENTAGE                
- ----------------------------------------------------------------------------------------------------
<S>     <C>                            <C>                                <C>                   
                                        BELOW 285 FEET BELOW TOP           BELOW 285 FEET BELOW TO  
                                        OF PHOSPHORIA FORMATION OR         OF PHOSPHORIA FORMATION OR 
                                        STRATIGRAPHIC EQUIVALENT:          STRATIGRAPHIC EQUIVALENT.  
                                                                                                    
                                                   None                    Perry R. Bass, Inc.      
                                                                                       25.000000%   
                                                                           Sid R. Bass, Inc.        
                                                                                       18.750000%   
                                                                           Lee M. Bass, Inc.        
                                                                                       18.750000%   
                                                                           Keystone, Inc.           
                                                                                       18.750000 %  
                                                                           Thru Line Inc.           
                                                                                       18.750000%   
                                                                                       ******
48        * Mesa Petroleum Company      Catherine A. Grieve                Worland Associates       
               25.000000%                          .02000000                           50.000000%   
          * Prudential Funds, Inc.      Sam D. Ayres                       * Posse Petroleum Ltd.   
               25.000000%                          .01500000                           21.500000%   
          Worland Associates            Legacy Energy Royalty              ** Perry R. Bass, Inc.   
               50.000000%               Income Fund Ltd.                                7.125000%    
                                                   .01500000               ** Sid R. Bass, Inc.     
                                                                                        5.343750%    
                                                                           ** Lee M. Bass, Inc.     
                                                                                        5.343750%    
                                                                           ** Keystone, Inc.        
                                                                                        5.343750%    
                                                                           ** Thru Line Inc.        
                                                                                        5.343750%    
</TABLE>
    *  Several assignments need to be       
       filed with the BLM in order to         
       bring the ownership current.           
       Said assignments have been filed       
       in the Washakie County records.        
                                           
    ** Interest acquired from R. S. Brennand, Jr., Trust. Assignments Pending. 

<PAGE>

                                                                     Page 7 of 7

          EXHIBIT A-3  PURCHASE AND SALE AGREEMENT DATED ___________, 1998 

                                 REVISED EXHIBIT B
                                  JANUARY 1, 1998
         ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
                      AND OPERATION OF THE NO WATER CREEK UNIT
                              WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>

TRACT                                      NO:                                                     ROYALTY OWNER 
 NO.    DESCRIPTION OF LAND               ACRES                                SERIAL NUMBER       & PERCENTAGE    
- -----------------------------------------------------------------------------------------------------------------
<S>     <C>                            <C>                                     <C>                 <C>  




TOTAL   8 FEDERAL TRACTS
                                       1,933.85 ACRES IN THE ENTIRE UNIT AREA.
                                       1,773.85 ACRES COMMITTED TO UNIT.



<CAPTION>

TRACT    LESSEE OF RECORD                 OVERRIDING ROYALTY                 WORKING INTEREST       
 NO.      & PERCENTAGE                    & DECIMAL INTEREST                   & PERCENTAGE         
- ----------------------------------------------------------------------------------------------------
<S>     <C>                            <C>                                <C>                   


</TABLE>
<TABLE>
<CAPTION>
                                                           R E C A P I T U L A T I O N

                                                
                                                    LAND           ACRES             PERCENTAGE
                                                    ----           -----             ----------
                                                <S>               <C>               <C>
                                                 Federal          1,773.85            100.00%
                                                 State               0                   0
                                                 Patented            0                   0
                                                                  --------            ------
                                                    TOTAL         1,773.85            100.00%
</TABLE>

- ------------------------------------------------------------------------------

<PAGE>
                                                                    Page 1 of 11
       EXHIBIT A-4 PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                            REVISED EXHIBIT B
                             JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
                 AND OPERATION OF THE SLICK CREEK UNIT
                          WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                                 NO.                           ROYALTY OWNER        LESSEE OF RECORD          
 NO.   DESCRIPTION OF LAND                          ACRES       SERIAL NUMBER        & PERCENTAGE          & PERCENTAGE            
- -----------------------------------------------------------------------------------------------------------------------------------
<S>    <C>                                         <C>         <C>                  <C>                  <C>
       FEDERAL LANDS

3      TOWNSHIP 47 NORTH, RANGE 92 WEST                            B-041449             U.S.A.           Worland Associates        
       Section 33: N/2NE/4, NE/4NW/4               400.00            HBP                  All                       50.000000%     
       Section 34: N/2N/2                                      Bass Lease 31132                          Perry R. Bass, Inc.       
       Section 35: SE/4NE/4, N/2NW/4                                                                                12.500000%     
                                                                                                         Sid R. Bass, Inc.         
                                                                                                                     9.375000%     
                                                                                                         Lee M. Bass, Inc.         
                                                                                                                     9.375000%     
                                                                                                         Keystone, Inc.            
                                                                                                                     9.375000%     
                                                                                                         Thru Line Inc.            
                                                                                                                     9.375000%     
                                                                                                                                   
                                                                                                                                   
                                                                                                                                   
                                                                                                                                   
                                                                                                                                   
                                                                                                                                   
                                                                                                                                   
                                                                                                                                   
                                                                                                                                   
                                                                                                                                   
                                                                                                                                   
                                                                                                                                   
                                                                                                                                   
                                                                                                                                   

<CAPTION>

TRACT    OVERRIDING ROYALTY                 WORKING INTEREST
 NO.     & DECIMAL INTEREST                   & PERCENTAGE
- ---------------------------------------------------------------
<S>      <C>                                <C>


3        Marguerite Sample                  Worland Associates
                   .02000000                          50.000000%
         Columbine II Limited               Perry R. Bass, Inc.
                   .01000000                          12.500000%
         B.S.&.B Oil Company                Sid R. Bass, Inc.
                   .00500000                           9.375000%
         Robert A. Prescott, Jr.            Lee M. Bass, Inc.
                   .00500000                           9.375000%
         Marion E. Newnam, Jr.              Keystone, Inc.
                   .00250000                           9.375000%
         Raymond W. Robbins &               Thru Line Inc.
         Betty Mae Robbins                             9.375000%
                   .00142857
         Jacquelyn Newnam
                   .00125000
         Marian Lorraine Newnam
                   .00125000
         Joseph L. and
         Jean B. Fusselman
                   .00071429
         Higer Oil, Inc.
                   .00047619
         Saratex, Inc.
                   .00047619
         Windfall Oil, Inc.
                   .00047619
</TABLE>

<PAGE>

                                                                    Page 2 of 11
       EXHIBIT A-4 PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                            REVISED EXHIBIT B
                             JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
                 AND OPERATION OF THE SLICK CREEK UNIT
                          WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                                 NO.                           ROYALTY OWNER        LESSEE OF RECORD         
 NO.   DESCRIPTION OF LAND                          ACRES       SERIAL NUMBER        & PERCENTAGE        & PERCENTAGE             
- ----------------------------------------------------------------------------------------------------------------------------------
<S>    <C>                                       <C>           <C>                  <C>                  <C>                      
       FEDERAL LANDS (CONT'D)

5      TOWNSHIP 47 NORTH, RANGE 92 WEST                            B-044366             U.S.A.           Worland Associates       
       Section 32: SE/4SW/4, SE/4,               1,640.00            HBP                  All                 100.00%             
                   SE/4NE/4                                    Bass Lease 31133                                                   
       Section 33: S/2, S/2N/2                                                                                                    
       Section 34: S/2, S/2N/2                                                                                                    
       Section 35: S/2, S/2NW/4, SW/4NE/4                                                                                         
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  

7      TOWNSHIP 46 NORTH, RANGE 92 WEST                            B-044702             U.S.A            Worland Associates       
       Section 10: NE/4NE/4                         80.00            HBP                  All                 100.00%             
       Section 11: NW/4NW/4                                    Bass Lease 31134                                                   
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
<CAPTION>
TRACT     OVERRIDING ROYALTY                 WORKING INTEREST
 NO.      & DECIMAL INTEREST                 & PERCENTAGE
- ------------------------------------------------------------------
<S>       <C>                                <C>
      

5         Willard & Shirley                  Worland Associates
          Chandler Residuary Trust-                    95.750000%
          Adele Chandler & Norwest           Perry R. Bass, Inc.
          Bank Wyo., Co-Trustees                        1.062520%
                    .00500000                Sid R. Bass, Inc.
          W. Eugene Chandler                             .796870%
                    .00500000                Lee M. Bass, Inc.
                                                         .796870%
                                             Keystone, Inc.
                                                         .796870%
                                             Thru Line Inc.
                                                         .796870%
                                                         ******
7         Columbine II Limited               Worland Associates
                    .00500000                          95.750000%
          Intoil, Inc.                       Perry R. Bass, Inc.
                    .00500000                           1.062520%
                                             Sid R. Bass, Inc.
                                                         .796870%
                                             Lee M. Bass, Inc.
                                                         .796870%
                                             Keystone, Inc.
                                                         .796870%
                                             Thru Line Inc.
                                                         .796870%
</TABLE>

<PAGE>

                                                                    Page 3 of 11
       EXHIBIT A-4 PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                            REVISED EXHIBIT B
                             JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
                 AND OPERATION OF THE SLICK CREEK UNIT
                          WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                                NO.                            ROYALTY OWNER        LESSEE OF RECORD       
 NO.   DESCRIPTION OF LAND                          ACRES       SERIAL NUMBER        & PERCENTAGE          & PERCENTAGE         
- --------------------------------------------------------------------------------------------------------------------------------
<S>    <C>                                         <C>         <C>                  <C>                  <C>                    
       FEDERAL LANDS (CONT'D)

9      TOWNSHIP 46 NORTH, RANGE 92 WEST                            B-044704             U.S.A            Worland Associates     
       Section 2: Lots 5, 6, 7, and 8,             991.52            HBP                  All                 100.00%           
                  S/2NW/4, SW/4NE/4,                            Bass Lease 31135                                                 
                  NW/4SE/4, SW/4                                                                                                
       Section 3: Lots 5, 6, 7, and 8,                                                                                         
                  S/2N/2, N/2SE/4,                                                                                             
                  SE/4SE/4                                                                                                     

<CAPTION>
TRACT        OVERRIDING ROYALTY                 WORKING INTEREST
 NO.         & DECIMAL INTEREST                   & PERCENTAGE
- ---------------------------------------------------------------------
<S>          <C>                                <C>                  
       

9            Juanita Herzeelle                  Worland Associates
                       .00500000                          95.750000%
             Worland Associates                 Perry R. Bass, Inc.
                       .00103125                           1.062520%
             Frank Jeppi By-Pass Trust,         Sid R. Bass, Inc.
             Harold Clifton, Trustee                        .796870%
                       .00075000                Lee M. Bass, Inc.
             George L. Bradford Estate-                     .796870%
             Peter C. Bradford, Executor        Keystone, Inc.
                       .00059375                            .796870%
             Rosoff Revocable Inter-Vivos       Thru Line Inc.
             Trust, Harold Jay & Kay K.                     .796870%
             Rosoff, Co-Trustees
                       .00059375
             James C. Branas
                       .00029688
             Marilyn B. Wedegaertner
                       .00029687
             Stella F. Birk
                       .00025000
             John A. Grine
                       .00025000
             James E. Ludlam, III
                       .00018750
             University Southern Calif.
                       .00018750
             Dorothy Lee Ingebretsen
                       .00012500
</TABLE>

<PAGE>

                                                                    Page 4 of 11
       EXHIBIT A-4 PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                            REVISED EXHIBIT B
                             JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
                 AND OPERATION OF THE SLICK CREEK UNIT
                          WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                                NO.                            ROYALTY OWNER        LESSEE OF RECORD         
 NO.   DESCRIPTION OF LAND                          ACRES       SERIAL NUMBER        & PERCENTAGE          & PERCENTAGE           
- ----------------------------------------------------------------------------------------------------------------------------------
<S>    <C>                                         <C>         <C>                  <C>                  <C>                      

       FEDERAL LANDS (CONT'D)
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  

10     TOWNSHIP 46 NORTH, RANGE 92 WEST                            B-044705             U.S.A.           Worland Associates       
       Section 4: Lots 5, 6, 7, and 8              195.28            HBP                  All                 100.000000%         
                                                               Bass Lease 31136                                                   
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  
                                                                                                                                  

11     TOWNSHIP 46 NORTH, RANGE 92 WEST                          Wyo. 0173-A           U.S.A.            Worland Associates       
       Section 5: Lot 13 and that portion of        48.51     (Out of B-037924)          All                  100.000000%         
       Lot 14 Located in the NE/4NE/4                                HBP                                                          
       (Previously Lot 5)                                      Bass Lease 31137                                                   

<CAPTION>
TRACT    OVERRIDING ROYALTY                 WORKING INTEREST
 NO.     & DECIMAL INTEREST                   & PERCENTAGE
- -----------------------------------------------------------------
<S>      <C>                                <C>                  

     
         Margo S. Andrews Trust, First
         Interstate Bank N.A., Trustee
                   .00007292
         Catherine Jo Roush
                   .00007292
         Suzanne Zimmerman Sims
                   .00007292
         Robert L. Zimmerman
                   .00007292
         W. James Saul
                  0.00007291
         Patricia W. Zimmerman
                   .00007291
                   ******
10       Perry R. Bass, Inc.                Worland Associates
                   .00250000                          95.750000%
         Sid R. Bass, Inc.                  Perry R. Bass, Inc.
                   .00187500                           1.062520%
         Lee M. Bass, Inc.                  Sid R. Bass, Inc.
                   .00187500                            .796870%
         Keystone, Inc.                     Lee M. Bass, Inc.
                   .00187500                            .796870%
         Thru Line Inc.                     Keystone, Inc.
                   .00187500                            .796870%
                                            Thru Line Inc.
                                                        .796870%
                                                        ******
11       Norman Family Trust                Worland Associates
                   .01333334                          95.750000%
         Hall Family Trust                  Perry R. Bass, Inc.
                   .01333333                           1.062520%
</TABLE>

<PAGE>

                                                                    Page 5 of 11
       EXHIBIT A-4 PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                            REVISED EXHIBIT B
                             JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
                 AND OPERATION OF THE SLICK CREEK UNIT
                          WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                                NO.                            ROYALTY OWNER        LESSEE OF RECORD        
 NO.   DESCRIPTION OF LAND                          ACRES       SERIAL NUMBER        & PERCENTAGE          & PERCENTAGE          
- ---------------------------------------------------------------------------------------------------------------------------------
<S>    <C>                                         <C>         <C>                  <C>                  <C>                     

       FEDERAL LANDS (CONT'D)
                                                                                                                                 

<CAPTION>
TRACT      OVERRIDING ROYALTY                 WORKING INTEREST
 NO.       & DECIMAL INTEREST                   & PERCENTAGE
- -------------------------------------------------------------------
<S>        <C>                                <C>                  

      
           Alice Van Arsdale                  Sid R. Bass, Inc.
                     .00666667                          .796870%
           Byron E. Van Arsdale, Jr.          Lee M. Bass, Inc.
                     .00666666                          .796870%
           Perry R. Bass, Inc.                Keystone, Inc.
                     .00250000                          .796870%
           Sid R. Bass, Inc.                  Thru Line Inc.
                     .00187500                          .796870%
           Lee M. Bass, Inc.
                     .00187500
           Keystone, Inc.
                     .00187500
           Thru Line Inc.
                     .00187500
</TABLE>

<PAGE>

                                                                    Page 6 of 11
       EXHIBIT A-4 PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                            REVISED EXHIBIT B
                             JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
                 AND OPERATION OF THE SLICK CREEK UNIT
                          WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                                NO.                            ROYALTY OWNER        LESSEE OF RECORD      
 NO.   DESCRIPTION OF LAND                          ACRES       SERIAL NUMBER        & PERCENTAGE          & PERCENTAGE        
- -------------------------------------------------------------------------------------------------------------------------------
<S>    <C>                                        <C>         <C>                  <C>                  <C>                   

       STATE LANDS

13     TOWNSHIP 47 NORTH, RANGE 92 WEST                         State 0-8644       State of Wyo.        Worland Associates    
       Section 36: W/2SW/4                          80.00            HBP                100%             100.000000%           
                                                              Bass Lease 31138
                                                                                                                               
                                                                                                                               
                                                                                                                               
                                                                                                                               
                                                                                                                               
                                                                                                                               
                                                                                                                               
                                                                                                                               
                                                                                                                               

<CAPTION>
TRACT       OVERRIDING ROYALTY                 WORKING INTEREST
 NO.        & DECIMAL INTEREST                   & PERCENTAGE
- --------------------------------------------------------------------
<S>         <C>                                <C>                  

     

13          None                               Worland Associates
                                                         95.750000%
                                               Perry R. Bass, Trustee
                                                          1.062490%
                                               Sid R. Bass, Inc.
                                                           .796890%
                                               Lee M. Bass, Inc.
                                                           .796880%
                                               Keystone, Inc.
                                                           .796880%
                                               Thru Line Inc.
                                                           .796860%


</TABLE>

<PAGE>

                                                                    Page 7 of 11
       EXHIBIT A-4 PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                            REVISED EXHIBIT B
                             JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
                 AND OPERATION OF THE SLICK CREEK UNIT
                          WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                                NO.                            ROYALTY OWNER       
 NO.   DESCRIPTION OF LAND                          ACRES       SERIAL NUMBER        & PERCENTAGE       
- --------------------------------------------------------------------------------------------------------
<S>    <C>                                         <C>         <C>                <C>                   

       PATENTED LANDS

15     TOWNSHIP 47 NORTH, RANGE 92 WEST                                           Geraldine M. Burton   
       Section 32: NE/4SW/4                        40.00            HBP                  .10000000     
       Recorded in Book 8, Page 70                             Bass Lease 31139   Virginia Black        
                                                                                          .02500000     
                                                                                                        
                                                                                                        
                                                                                                        
                                                                                                        
                                                                                                        
                                                                                                        
                                                                                                        
                                                                                                        
16     TOWNSHIP 47 NORTH, RANGE 92 WEST                                           Marjorie H. Colby     
       Section 32: W/2NE/4, SE/4NW/4               120.00            HBP                  .03750000     
       Recorded in Book 8, Page 72                              Bass Lease 31140   Lisa Bang             
                                                                                          .01250000     
                                                                                  Ann Parsons Estay     
                                                                                          .01125000     
                                                                                  Jerry Hastings        
                                                                                          .00937500     
                                                                                  Roger D. Hastings     
                                                                                          .00937500     
                                                                                  Wesley Hastings       
                                                                                          .00937500     
                                                                                  Alice J. Kraft
                                                                                          .00937500
                                                                                  Alice V. Parsons
                                                                                          .00625000
                                                                                  Roderick L. Dungan
                                                                                          .00305554     

<CAPTION>
TRACT      LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST
 NO.         & PERCENTAGE                & DECIMAL INTEREST                   & PERCENTAGE
- --------------------------------------------------------------------------------------------------
<S>        <C>                           <C>                                <C>                  

      

15         Worland Associates            None                               Worland Associates
                 95.750000%                                                           95.750000%
           Perry R. Bass, Trustee                                           Perry R. Bass, Trustee
                  1.062520%                                                            1.062520%
           Sid R. Bass, Inc.                                                Sid R. Bass, Inc.
                   .796870%                                                             .796870%
           Lee M. Bass, Inc.                                                Lee M. Bass, Inc.
                   .796870%                                                             .796870%
           Keystone, Inc.                                                   Keystone, Inc.
                   .796870%                                                             .796870%
           Thru Line Inc.                                                   Thru Line Inc.
                   .796870%                                                             .796870%
                   ******                                                               ******
16         Worland Associates            None                               Worland Associates
                 95.750000%                                                           95.750000%
           Perry R. Bass, Trustee                                           Perry R. Bass, Trustee
                  1.062520%                                                            1.062520%
           Sid R. Bass, Inc.                                                Sid R. Bass, Inc.
                   .796870%                                                             .796870%
           Lee M. Bass, Inc.                                                Lee M. Bass, Inc.
                   .796870%                                                             .796870%
           Keystone, Inc.                                                   Keystone, Inc.
                   .796870%                                                             .796870%
           Thru Line Inc.                                                   Thru Line Inc.
                   .796870%                                                             .796870%
</TABLE>

<PAGE>

                                                                    Page 8 of 11
       EXHIBIT A-4 PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                            REVISED EXHIBIT B
                             JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
                 AND OPERATION OF THE SLICK CREEK UNIT
                          WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                                NO.                            ROYALTY OWNER        
 NO.   DESCRIPTION OF LAND                          ACRES       SERIAL NUMBER        & PERCENTAGE        
- ---------------------------------------------------------------------------------------------------------
<S>    <C>                                         <C>         <C>                <C>                    

            PATENTED LANDS (CONT'D)
                                                                                  Laura Ann Shaw
                                                                                          .00250000
                                                                                  Francis L. Farmer
                                                                                          .00180554
                                                                                  Robert R. Pisto and
                                                                                  Margaret L. Pisto Trust
                                                                                          .00180554
                                                                                  Mary Eloise L. Shaw
                                                                                          .00180554
                                                                                  David Grant Laird
                                                                                          .00138887
                                                                                  Penelope Laird Carroll
                                                                                  Trust, Norwest Bank
                                                                                  Wyoming NA, Trustee
                                                                                          .00083334
                                                                                  Loren E. Laird Trust, Norwest
                                                                                  Bank Wyoming NA, Trustee
                                                                                          .00083334
                                                                                  Florence S. Laird Trust,
                                                                                  Norwest Bank Wyoming
                                                                                  NA, Trustee
                                                                                          .00083333
                                                                                  R. E Laird Trust, Norwest
                                                                                  Bank Wyoming NA, Trustee
                                                                                          .00083333
                                                                                  Julia Laird Wortham Trust,
                                                                                  Norwest Bank Wyoming
                                                                                  NA, Trustee
                                                                                          .00083333
                                                                                  Frank W. Laird
                                                                                          .00060188


<CAPTION>
TRACT       LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST
 NO.          & PERCENTAGE                & DECIMAL INTEREST                   & PERCENTAGE
- ---------------------------------------------------------------------------------------------
<S>         <C>                           <C>                                <C>                  


</TABLE>

<PAGE>

                                                                    Page 9 of 11
       EXHIBIT A-4 PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                            REVISED EXHIBIT B
                             JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
                 AND OPERATION OF THE SLICK CREEK UNIT
                          WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                                NO.                            ROYALTY OWNER        LESSEE OF RECORD       
 NO.   DESCRIPTION OF LAND                          ACRES       SERIAL NUMBER        & PERCENTAGE          & PERCENTAGE         
- -----------------------------------------------------------------------------------------------------------------------------
<S>    <C>                                         <C>         <C>                <C>                     <C>                      
                                                                                                         
       PATENTED LANDS (CONT'D)                                                                           
                                                                                  Stephanie L. Arries    
                                                                                          .00060187      
                                                                                  Penelope Laird Carroll 
                                                                                          .00055554      
                                                                                  Loren Edward Laird     
                                                                                          .00055554      
                                                                                  Julia Laird Wortham    
                                                                                          .00055554      
                                                                                  Glendon Leroy Laird    
                                                                                          .00041667      
                                                                                  Matthew Laird          
                                                                                          .00009263      
                                                                                  Meghan Laird           
                                                                                          .00009263      
                                                                                           ******               
17     TOWNSHIP 47 NORTH, RANGE 92 WEST                                           Roderick L. Dungan      Worland Associates
       Section 32: NE/4NE/4                         80.00            HBP                  .01909711                  95.750000%
       Section 33: NW/4NW/4                                    Bass Lease 31141   Laura Ann Shaw          Perry R. Bass, Trustee
       Recorded in Book 11, Page 566                                                      .01562500                   1.062520%
                                                                                  Francis L. Farmer       Sid R. Bass, Inc.
                                                                                          .01128470                    .796870%
                                                                                  Robert R. Pisto and     Lee M. Bass, Inc.
                                                                                  Margaret L. Pisto Trust              .796870%
                                                                                          .01128470       Keystone, Inc.    
                                                                                  Mary Eloise L. Shaw                  .796870%
                                                                                          .01128470       Thru Line Inc.     
                                                                                  David Grant Laird                    .796870%
                                                                                          .00868053

<CAPTION>
TRACT          OVERRIDING ROYALTY                 WORKING INTEREST
 NO.           & DECIMAL INTEREST                   & PERCENTAGE
- -----------------------------------------------------------------------
<S>            <C>                                <C>                  














17             None                               Worland Associates
                                                            95.750000%
                                                  Perry R. Bass, Trustee
                                                             1.062520%
                                                  Sid R. Bass, Inc.
                                                              .796870%
                                                  Lee M. Bass, Inc.
                                                              .796870%
                                                  Keystone, Inc.
                                                              .796870%
                                                  Thru Line Inc.
                                                              .796870%
</TABLE>

<PAGE>

                                                                   Page 10 of 11
       EXHIBIT A-4 PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                            REVISED EXHIBIT B
                             JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
                 AND OPERATION OF THE SLICK CREEK UNIT
                          WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                                NO.                            ROYALTY OWNER        
 NO.   DESCRIPTION OF LAND                          ACRES       SERIAL NUMBER        & PERCENTAGE        
- ---------------------------------------------------------------------------------------------------------
<S>    <C>                                         <C>         <C>                <C>                  

            PATENTED LANDS (CONT'D)
                                                                                  Penelope Laird Carroll
                                                                                  Trust, Norwest Bank to
                                                                                  Wyoming NA, Trustee
                                                                                          .00520834
                                                                                  Loren E. Laird Trust,
                                                                                  Norwest Bank Wyoming
                                                                                  NA, Trustee
                                                                                          .00520834
                                                                                  Florence S. Laird Trust,
                                                                                  Norwest Bank Wyoming
                                                                                  NA, Trustee
                                                                                          .00520833
                                                                                  R. E Laird Trust, Norwest
                                                                                  Bank Wyoming NA, Trustee
                                                                                          .00520833
                                                                                  Julia Laird Wortham Trust,
                                                                                  Norwest Bank Wyoming
                                                                                  NA, Trustee
                                                                                          .00520833
                                                                                  Stephanie L. Arries
                                                                                          .00376167
                                                                                  Frank W. Laird
                                                                                          .00376167
                                                                                  Penelope Laird Carroll
                                                                                          .00347220
                                                                                  Loren Edward Laird
                                                                                          .00347220
                                                                                  Julia Laird Wortham
                                                                                          .00347220
<CAPTION>
TRACT       LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST
 NO.          & PERCENTAGE                & DECIMAL INTEREST                   & PERCENTAGE
- ---------------------------------------------------------------------------------------------
<S>         <C>                           <C>                                <C>                  







</TABLE>

<PAGE>

                                                                   Page 11 of 11
       EXHIBIT A-4 PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                            REVISED EXHIBIT B
                             JANUARY 1, 1998
       ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
                 AND OPERATION OF THE SLICK CREEK UNIT
                          WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                                NO.                            ROYALTY OWNER        LESSEE OF RECORD     
 NO.   DESCRIPTION OF LAND                          ACRES       SERIAL NUMBER        & PERCENTAGE          & PERCENTAGE       
- ------------------------------------------------------------------------------------------------------------------------------
<S>    <C>                                         <C>         <C>                <C>                  <C>                    

       PATENTED LANDS (CONT'D)


                                                                                  Glendon Leroy Laird
                                                                                          .00260416
                                                                                  Matthew Laird
                                                                                          .00057875
                                                                                  Meghan Laird
                                                                                          .00057874                           

<CAPTION>
TRACT         OVERRIDING ROYALTY                 WORKING INTEREST
 NO.          & DECIMAL INTEREST                   & PERCENTAGE
- ----------------------------------------------------------------------
<S>         <C>                                <C>                  

      
</TABLE>



<TABLE>
<CAPTION>
                 R E C A P I T U L A T I O N

       LAND                ACRES         PERCENTAGE
       ----                -----         ----------
       <S>              <C>              <C>
       Federal          3,355.31           91.29%
       State               80.00            2.18%
       Patented           240.00            6.53%
                        --------         -------
           TOTAL        3,675.31          100.00%
</TABLE>

<PAGE>
                                                                     Page 1 of 2
       EXHIBIT A-5  PURCHASE AND SALE AGREEMENT DATED ___________, 1998

                                REVISED EXHIBIT B
                                 JANUARY 1, 1998
        ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
                      AND OPERATION OF THE SOUTH FRISBY UNIT
                             WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                                 NO.                           ROYALTY OWNER
 NO.        DESCRIPTION OF LAND                     ACRES       SERIAL NUMBER        & PERCENTAGE
- --------------------------------------------------------------------------------------------------
<S>    <C>                                         <C>         <C>                  <C>
            FEDERAL LANDS

1      TOWNSHIP 47 NORTH, RANGE 91 WEST                           W-0314025             U.S.A.
       Section 19: Lots 11 and 12                  131.49            HBP                  All
                                                               Bass Lease 31109
       TOWNSHIP 47 NORTH, RANGE 92 WEST
       Section 24: SW/4NE/4, NE/4SE/4
       (Part of lease falls outside Unit Outline)
       Recorded in Book 108, Page 177

3      TOWNSHIP 47 NORTH, RANGE 92 WEST                            W-11773             U.S.A.
       Section 24: NW/4, NE/4SW/4                  200.00            HBP                 All
       (Part of lease falls outside Unit Outline)              Bass Lease 31121
       Recorded in Book 32, Page 616

5      TOWNSHIP 47 NORTH, RANGE 92 WEST                            W-11775               U.S.A
       Section 24: NW/4SE/4, S/2SE/4               280.00            HBP                  All
       Section 25: E/2NE/4, NW/4NE/4,                          Bass Lease 31123
                   NE/4SE/4
       (Part of lease falls outside Unit Outline)
       Recorded in Book 116, Page 23

6      TOWNSHIP 47 NORTH, RANGE 91 WEST                            W-32357               U.S.A
       Sec. 30: Lots 5, 6, 7, 8, 9, and10          274.83            HBP                  All
                E/2NW/4, NE/4SW/4                              Bass Lease 31144
       Recorded in Book 131, Page 436







<CAPTION>
TRACT  LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST
 NO.   & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE
- -------------------------------------------------------------------------------------------
<S>    <C>                          <C>                                 <C>
1      Worland Associates            Key Production Co. Inc.            Worland Associates
            100%                          .01500000                          100%
                                     LaCoy Family Trust, James F.
                                     LaCoy or Mildred H. LaCoy or
                                     Lorraine A. LaCoy, Trustees
                                          .00500000


3      Worland Associates                 None                          Worland Associates
            100%                                                             100%



5      Worland Associates                 None                          Worland Associates
            100%                                                             100%





6      Worland Associates            Myron Grossman                     Worland Associates
            100%                          .01350000                          100%
                                     William D. Bonilla, Sr.
                                          .00337500
                                     Sandra Fay Bornstein
                                          .00337500
                                     Sharon Bornstein Erenwert
                                          .00337500
                                     Rosalyn Bornstein Marcum
                                          .00337500
</TABLE>

<PAGE>

                                                                     Page 2 of 2
       EXHIBIT A-5  PURCHASE AND SALE AGREEMENT DATED ___________, 1998

                                REVISED EXHIBIT B
                                 JANUARY 1, 1998
        ATTACHED TO AND MADE A PART OF UNIT AGREEMENT FOR THE DEVELOPMENT
                      AND OPERATION OF THE SOUTH FRISBY UNIT
                             WASHAKIE COUNTY, WYOMING

<TABLE>
<CAPTION>
TRACT                                                 NO.                           ROYALTY OWNER
 NO.        DESCRIPTION OF LAND                     ACRES       SERIAL NUMBER        & PERCENTAGE
- ---------------------------------------------------------------------------------------------------
<S>    <C>                                         <C>        <C>                   <C>
            FEDERAL LANDS (CONT'D)





7      TOWNSHIP 47 NORTH, RANGE 91 WEST                            W-38586               U.S.A
       Section 30: Lots 11 and 12, SE/4SW/4         91.73            HBP                  All
       Recorded in Book 131, Page 436                          Bass Lease 31146












8      TOWNSHIP 47 NORTH, RANGE 92 WEST                            W-50465               U.S.A
       Section 25: SE/4SE/4                         40.00            HBP                  All
       Recorded in Book 44, Page 2114                          Bass Lease 31149

<CAPTION>
TRACT    LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST
 NO.       & PERCENTAGE                & DECIMAL INTEREST                   & PERCENTAGE
- ----------------------------------------------------------------------------------------------
<S>      <C>                           <C>                                <C>

                                       Jon Nelson
                                            .00150000
                                       Sherman Nelson
                                            .00150000
                                            ******
7        Worland Associates            Myron Grossman                     Worland Associates
              100%                          .01350000                          100%
                                       William D. Bonilla, Sr.
                                            .00337500
                                       Sandra Fay Bornstein
                                            .00337500
                                       Sharon Bornstein Erenwert
                                            .00337500
                                       Rosalyn Bornstein Marcum
                                            .00337500
                                       Jon Nelson
                                            .00150000
                                       Sherman Nelson
                                            .00150000
                                            ******
8        Worland Associates            Hurley Oil Properties              Worland Associates
              100%                          .04000000                          100%

</TABLE>

<TABLE>
<CAPTION>
                                            RECAPITULATION

                               LAND                  ACRES        PERCENTAGE
                               ----                  -----        ----------
                               <S>                <C>             <C>
                               Federal            1,018.05         100.00%
                               State                 0                0
                               Patented              0                0
                                                  --------        ----------

                               TOTAL UNIT         1,018.05         100.00%
</TABLE>

<PAGE>

                                                                     Page 1 of 1
NON-UNITIZED, PRODUCING                    EXHIBIT A-6
BIG HORN COUNTY, WYOMING    PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                     EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                 NO.      SERIAL NO. &          ROYALTY OWNER
 NO.   DESCRIPTION OF LAND                          ACRES    EXPIRATION DATE         & PERCENTAGE
- --------------------------------------------------------------------------------------------------
<S>    <C>                                         <C>       <C>                  <C>
            FEDERAL LANDS

N/A    TOWNSHIP 51 NORTH, RANGE 92 WEST                            W-58669               U.S.A
       Section 23: Tract 58M                       447.92            HBP                  All
       Section 24: Tracts 58N, 58O, 58P, and 59                Bass Lease 34851
       Section 25: Lot 4
       Section 26: Tracts 50A, 50B, 50C, 50F,
                   50G, and 50H





N/A    TOWNSHIP 51 NORTH, RANGE 92 WEST                           WYW-113553             U.S.A
       Section 24: Lot 3                           446.45            HBP                  All
       Section 25: Lots 1 and 2, Tracts 48A,                   Bass Lease 35159
                   48B, 49I, 49J, 49K, 49N,
                   49O, and 49P






<CAPTION>
TRACT  LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST
 NO.   & PERCENTAGE                  & DECIMAL INTEREST                 & PERCENTAGE
- --------------------------------------------------------------------------------------------
<S>    <C>                           <C>                                <C>
N/A    Arthur L. Vermillion          Perry R. Bass, Inc.                Arthur L. Vermillion
            100.00%                       .01000000                          100.00%
                                     Sid R. Bass, Inc.
                                          .00750000
                                     Lee M. Bass, Inc.
                                          .00750000
                                     Keystone, Inc.
                                          .00750000
                                     Thru Line Inc.
                                          .00750000
                                          ******
N/A    Arthur L. Vermillion          Perry R. Bass, Inc.                Arthur L. Vermilion
            100.00%                       .00207500                          100.00%
                                     Sid R. Bass, Inc.
                                          .00155625
                                     Lee M. Bass, Inc.
                                          .00155625
                                     Keystone, Inc.
                                          .00155625
                                     Thru Line Inc.
                                          .00155625
</TABLE>

<PAGE>

NON-UNITIZED, PRODUCING                EXHIBIT A-7                Page 1 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                  EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER   
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE    
- ---------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>             
       FEDERAL LANDS

N/A    TOWNSHIP 47 NORTH, RANGE 91 WEST                                         W-53020             U.S.A.     
       Section 34: E/2SE/4                                      680.00            HBP                All       
       Section 35: E/2, E/2W/2, SW/4NW/4,                                   Bass Lease 20073                   
                   W/2SW/4                                                                                     
                                                                                                               
       Subject to C.A. NRM-1872 for Phosphoria Formation                                                      
       covering the NW/4 Section 35-47N-91W.                                                                   
                                                                                                               
                                                                                                               
                                                                                                               
N/A    TOWNSHIP 46 NORTH, RANGE 91 WEST                                         W-57014             U.S.A.     
       Section 1: Lots 8, 9, and 16,                            750.99            HBP                All       
                  SW/4NW/4, SW/4                                            Bass Lease 20074                   
       Section 2: Lots 5, 6, 7, 8, 10, 11, 12, 13, 14,                                                         
                  and 15, S/2NE/4, SE/4NW/4                                                                
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               

N/A    TOWNSHIP 46 NORTH, RANGE 91 WEST                                        W-29763-C             U.S.A     
       Section 2: SE/4                                          320.00            HBP                 All       
       Section 11: NE/4                                                     Bass Lease 23335                   
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
<CAPTION>
TRACT   LESSEE OF RECORD                OVERRIDING ROYALTY                 WORKING INTEREST
 NO.      & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE
- ------------------------------------------------------------------------------------------------
<S>     <C>                           <C>                                <C>  
      

N/A        Perry R. Bass, Inc.           D. J. Brew                         Perry R. Bass, Inc.
                25.000000%                        .02500000                         25.000000%
           Sid R. Bass, Inc.             Joseph J. C. Paine                 Sid R. Bass, Inc.
                18.750000%                        .02500000                         18.750000%
           Lee M. Bass, Inc.             Viking Exploration                 Lee M. Bass, Inc.
                18.750000%                        .01250000                         18.750000%
           Keystone, Inc.                                                   Keystone, Inc.
                18.750000%                                                          18.750000%
           Thru Line Inc.                                                   Thru Line Inc.
                18.750000%                                                          18.750000%
               ******                                                             ******
N/A        W. D. Partners, L. P.         Viking Exploration                 W. D. Partners, L.P.
                25.000000%                        .05250000                         25.000000%
           Sid R. Bass, Inc.             Mildred M. Einarsen                Sid R. Bass, Inc.
                18.750000%                        .01000000                         18.750000%
           Lee M. Bass, Inc.                                                Lee M. Bass, Inc.
                18.750000%                                                          18.750000%
           Keystone, Inc.                                                   Keystone, Inc.
                18.750000%                                                          18.750000%
           Thru Line Inc.                                                   Thru Line Inc.
                18.750000%                                                          18.750000%
               ******                                                             ******
N/A        Perry R. Bass, Inc.           E. E. Engleman                     Perry R. Bass, Inc.
                25.000000%                        .02250000                         25.000000%
           Sid R. Bass, Inc.             L. R. Company                      Sid R. Bass, Inc.
                18.750000%                        .02250000                         18.750000%
           Lee M. Bass, Inc.             Gene R. George                     Lee M. Bass, Inc.
                18.750000%                        .00500000                         18.750000%
           Keystone, Inc.                                                   Keystone, Inc.
                18.750000%                                                          18.750000%
           Thru Line Inc.                                                   Thru Line Inc.
                18.750000%                                                          18.750000%

</TABLE>
<PAGE>

NON-UNITIZED, PRODUCING                  EXHIBIT A-7              Page 2 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                        EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER    
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE     
- ----------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>              
       FEDERAL LANDS (CONT'D)

N/A    TOWNSHIP 47 NORTH, RANGE 91 WEST                                        W-8238               U.S.A.      
       Section 29: NE/4                                         200.00          HBP                  All        
       Section 35: NW/4NW/4                                              Bass Leases 25280,                     
                                                                          31107, and 31613                      
       Subject to C.A. NRM-1872 for Phosphoria                                                                  
       Formation covering the NW/4 Section 35-47N-91W.                                                          
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                

                                                                                                                

                                                                                                                
                                                                                                                
                                                                                                                

                                                                                                                

                                                                                                                
                                                                                                                
                                                                                                                

N/A    TOWNSHIP 47 NORTH, RANGE 91 WEST                                         W-45483             U.S.A       
       Section 26: SW/4                                         480.00            HBP                All        
       Section 27: S/2                                                     Bass Leases 30938                    
                                                                               and 38796                        
                                                                                                                
                                                                                                                

<CAPTION>
TRACT  LESSEE OF RECORD                OVERRIDING ROYALTY                 WORKING INTEREST
 NO.     & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE
- -----------------------------------------------------------------------------------------------
<S>    <C>                           <C>                                <C>  
      

N/A       Worland Associates            Pioneer Production                 AS TO NW/4NW/4 SECTION 35
               100.000000%                       .03000000                 SURFACE TO 9,862 FEET:
                                        Rex Randolph
                                                 .02000000                 Worland Associates
                                                                                   50.000000%
                                                                           Perry R. Bass, Inc.
                                                                                   12.500000%
                                                                           Sid R. Bass, Inc.
                                                                                   9.375000%
                                                                           Lee M. Bass, Inc.
                                                                                   9.375000%
                                                                           Keystone, Inc.
                                                                                   9.375000%
                                                                           Thru Line Inc.
                                                                                   9.375000%
                                                                                     ------
                                                                           BELOW 9,862 FEET:

                                                                           Worland Associates
                                                                                   100.000000%
                                                                                     ------

                                                                           AS TO NE/4 SECTION 29:

                                                                           Worland Associates
                                                                                   100.000000%
                                                                                     ******

N/A       Mobil Exploration & Prod.     AS TO SW/4 SECTION 26:             FROM SURFACE TO STRATIGRAPHIC
          North America, Inc.                                              EQUIVALENT OF 9,906 FEET:
               100.000000%              Mobil Expl. & Production           (CCU FEDERAL #26-23)
                                                 .09000000
                                        Barbara J. Kaley                   AS TO NW/4SW/4 SECTION 26:
                                                 .04500000

</TABLE>
<PAGE>

NON-UNITIZED, PRODUCING                      EXHIBIT A-7          Page 3 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                        EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER   
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE    
- ---------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>             

            FEDERAL LANDS (CONT'D)

                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               

                                                                                                               

                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               

                                                                                                 
                                                                                                
                                                                                                

<CAPTION>
TRACT     LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST
 NO.        & PERCENTAGE                & DECIMAL INTEREST                   & PERCENTAGE
- ------------------------------------------------------------------------------------------------
<S>       <C>                         <C>                                <C>  
                                 
                                 
                                 
                                         V. H. Knisely                      Perry R. Bass, Inc.
                                                  .03500000                         25.000000%
                                             ------                         Keystone, Inc.
                                         AS TO S/2 SECTION 27:                      18.750000%
                                                                            Thru Line Inc.
                                         Mobil Oil Corp.                            18.750000%
                                                  .12500000                 Sid R. Bass, Trustee
                                         Bruce Anderson                             11.250000%
                                         7/8ths of .01000000                Lee M. Bass
                                         V. H. Knisely                              11.250000%
                                                  .01750000                 Sid R. Bass, Inc.
                                         Lance Creek Royalties Co.                  7.500000%
                                         1/2 of .01000000                   Lee M. Bass, Inc.
                                         Richard L. Peterson                        7.500000%
                                         3/8ths of .01000000                       ------
                                 
                                                                            AS TO SE/4SW/4 SECTION 26:
                                 
                                                                            Perry R. Bass, Inc.
                                                                                    25.000000%
                                                                            Sid R. Bass, Trustee
                                                                                    18.750000%
                                                                            Lee M. Bass
                                                                                    18.750000%
                                                                            Keystone, Inc.
                                                                                    18.750000%
                                                                            Thru Line Inc.
                                                                                    18.750000%
                                                                                    ------
                                                                            AS TO DEEP RIGHTS OF ABOVE LANDS
                                                                            AND ALL DEPTHS AS TO REMAINING
                                                                            LANDS:

</TABLE>
<PAGE>

NON-UNITIZED, PRODUCING                     EXHIBIT A-7           Page 4 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                      EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER    
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE     
- ----------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>              
       FEDERAL LANDS (CONT'D)

                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                

N/A    TOWNSHIP 47 NORTH, RANGE 91 WEST                                         W-91920             U.S.A.      
       Section 20: E/2                                          480.00            HBP                All        
       Section 21: SW/4                                                   Bass Lease 30948                      
                                                                                                                

                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                

                                                                                                                
                                                                                                                
<CAPTION>
TRACT  LESSEE OF RECORD                OVERRIDING ROYALTY                 WORKING INTEREST
 NO.     & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE
- -----------------------------------------------------------------------------------------------
<S>    <C>                           <C>                                <C>  
      

                                                                           Perry R. Bass, Inc.
                                                                                   25.000000%
                                                                           Sid R. Bass, Inc.
                                                                                   18.750000%
                                                                           Lee M. Bass, Inc.
                                                                                   18.750000%
                                                                           Keystone, Inc.
                                                                                   18.750000%
                                                                           Thru Line Inc.
                                                                                   18.750000%
                                                                                  ******
N/A       Perry R. Bass, Inc.           None                               AS TO SE/4SW/4 SECTION 21:
               25.000000%
          Sid R. Bass, Inc.                                                FROM SURFACE TO STRATIGRAPHIC
               18.750000%                                                  EQUIVALENT OF 10.445 FEET
          Lee M. Bass, Inc.                                                (CCU FEDERAL #21-23):
               18.750000%
          Keystone, Inc.                                                   Perry R. Bass, Inc.
               18.750000%                                                          25.000000%
          Thru Line Inc.                                                   Sid R. Bass, Trustee
               18.750000%                                                          18.750000%
                                                                           Lee M. Bass
                                                                                   18.750000%
                                                                           Keystone, Inc.
                                                                                   18.750000%
                                                                           Thru Line Inc.
                                                                                   18.750000%
                                                                                   ------
                                                                           BELOW AND AS TO ALL DEPTHS OF
                                                                           REMAINING LANDS:
</TABLE>

<PAGE>

NON-UNITIZED, PRODUCING                       EXHIBIT A-7         Page 5 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                        EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER   
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE    
- ---------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>             

            FEDERAL LANDS (CONT'D)

                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               

N/A    TOWNSHIP 47 NORTH, RANGE 91 WEST                                       B-039524             U.S.A.      
       Section 32: S/2, NE/4                                    800.00           HBP                All       
       Section 33: N/2                                                   Bass Leases 31100,                    
       (Other lands in lease fall in Marconi                              31529, and 34084                                         
       Prospect)                                                                                               
                                                                                                               
       NOTE: SW/4 of Section 32 falls in                                                                       
       No Water Creek Unit Outline; however,                                                                   
       was not committed to Unit. Lands also                                                                   
       appear on No Water Creek Unit Exhibit.                                                                  
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
<CAPTION>
TRACT  LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST
 NO.     & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE
- -----------------------------------------------------------------------------------------------
<S>    <C>                           <C>                                <C>  

     

                                                                           Perry R. Bass, Inc.
                                                                                   25.000000%
                                                                           Sid R. Bass, Inc.
                                                                                   18.750000%
                                                                           Lee M. Bass, Inc.
                                                                                   18.750000%
                                                                           Keystone, Inc.
                                                                                   18.750000%
                                                                           Thru Line, Inc.
                                                                                   18.750000%
                                                                                   ******
N/A       Perry R. Bass, Inc.           * Burdens Only Worland's           AS TO ALL LANDS EXCEPT:
               25.000000%                 Interest: Worland Associates     NE/4 SECTION 32 FROM SURFACE
          Sid R. Bass, Inc.                      .03125000                 TO 10,625 FEET:
               18.750000%                                                  NW/4 SECTION 33 FROM SURFACE
          Lee M. Bass, Inc.             AS TO ALL LANDS EXCEPT NE/4        TO 10,463 FEET:
               18.750000%               SECTION 33:
          Keystone, Inc.                                                   Worland Associates
               18.750000%               Worland Associates                         50.000000% *
          Thru Line Inc.                         .01972400                 Perry R. Bass, Inc.
               18.750000%               Cottonwood Properties                      12.500000%
                                                 .01000000                 Sid R. Bass, Inc.
                                        Guy R. Campbell                            9.375000%
                                                 .00500000                 Lee M. Bass, Inc.
                                        Guy R. Campbell, Jr. & Co.                 9.375000%
                                                 .00500000                 Keystone, Inc.
                                        K&B Company                                9.375000%
                                                 .00500000                 Thru Line Inc.
                                        Wheatley Oil Company                       9.375000%
                                                 .00500000
                                        Anna Stark
                                                 .00027600

</TABLE>
<PAGE>

NON-UNITIZED, PRODUCING                      EXHIBIT A-7          Page 6 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                      EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER  
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE   
- --------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>            

            FEDERAL LANDS (CONT'D)                                                                            
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              

                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
                                                                                                              
<CAPTION>
TRACT    LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST
 NO.       & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE
- -------------------------------------------------------------------------------------------------
<S>      <C>                           <C>                                <C>  

                                          AS TO SECTION 33 NE/4:
                                          Worland Associates
                                                   .01472400
                                          Cottonwood Properties
                                                   .01000000
                                          Guy R. Campbell
                                                   .00500000
                                          Guy R. Campbell, Jr. & Co.
                                                   .00500000
                                          Carl Hoelzel
                                                   .00500000
                                          K&B Company
                                                   .00500000
                                          Wheatley Oil Company
                                                   .00500000
                                          Anna Stark
                                                   .00027600
                                                  ------
                                          AS TO SECTION 32: NE/4 (SURFACE
                                          TO 10,625 FEET:
                                          SECTION 33: NW/4 (SURFACE TO
                                          TO 10,463 FEET:

                                          Worland Associates Has an
                                          Additional .00625000
                                          Perry R. Bass, Inc.
                                                   25.00% x .03750000
                                          Sid R. Bass, Inc.
                                                   18.75% x .03750000
                                          Lee M. Bass, Inc.
                                                   18.75% x .03750000
                                          Keystone, Inc.
                                                   18.75% x .03750000

</TABLE>
<PAGE>

NON-UNITIZED, PRODUCING                       EXHIBIT A-7         Page 7 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                       EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER    
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE     
- ----------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>              

            FEDERAL LANDS (CONT'D)

                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                

N/A    TOWNSHIP 47 NORTH, RANGE 91 WEST                                        W-5741               U.S.A.      
       Section 28: NW/4, S/2                                    480.00            HBP                All        
                                                                          Bass Lease 31101
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                

                                                                                                                
                                                                                                                

N/A    TOWNSHIP 47 NORTH, RANGE 91 WEST                                        W-0320078           U.S.A.       
       Section 7:  Lots 9, 10, 11, and 12,                    1,164.96            HBP                All        
                   SE/4SW/4                                                 Bass Leases 31103                    
       Section 18: Lots 5, 6, 7, 8, and 9,                                     and 41142                        
                   E/2NW/4
       Section 20: W/2                                                                                          
       Section 29: W/2, SE/4                                                                                    
                                                                                                                
<CAPTION>
TRACT  LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST
 NO.     & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE
- -----------------------------------------------------------------------------------------------
<S>    <C>                           <C>                                <C>  

      

                                        Thru Line Inc.
                                                 18.75%  x .03750000
                                        NOTE: Historically, ORI
                                              has not merged into WI.
                                                 ******
N/A       Worland Associates            AS TO SE/4SW/4: SURFACE TO         AS TO SE/4NW/4: SURFACE TO
               100.000000%              BASE OF PHOSPHORIA FORMATION:      BASE OF PHOSPHORIA FORMATION:
      
                                        Worland Associates                 Worland Associates *
                                                 .05000000-.17500000               12.500000%
                                                  ------
                                        AS TO SE/4NW/4: SURFACE TO         * Subject to conversion to ORI
                                        BASE OF PHOSPHORIA FORMATION:      if daily average production
                                                                           of the Tenneco USA#3 Well
                                        Worland Associates                 exceeds 15 BOPD for 60 days.
                                                 .05000000                         ------
                                                                           AS TO SE/4SW/4, SE/4NW/4
                                                                           BELOW BASE OF PHOSPHORIA
                                                                           FORMATION AND REMAINING
                                                                           LANDS AS TO ALL DEPTHS:

                                                                           Worland Associates
                                                                                   100.000000%
                                                                                   ******
N/A       Worland Associates            C. A. Caldwell, Jr.                AS TO W/2 SECTION 20, SE/4
                100.000000%                      .02500000                 SECTION 29 AND BELOW BASE OF
                                        Joyce Wolf                         PHOSPHORIA FORMATION IN
                                                 .01000000                 REMAINING LANDS:
                                                  ------
                                        AS TO SECTION 18 LANDS AND W/2     Worland Associates
                                        SECTION 29: SURFACE TO BASE OF     100.000000%
                                        PHOSPHORIA FORMATION:

</TABLE>
<PAGE>

NON-UNITIZED, PRODUCING                     EXHIBIT A-7           Page 8 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                      EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER   
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE    
- ---------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>             
            FEDERAL LANDS (CONT'D)

       Subject to C.A. NRM-1195 for Phosphoria Formation                                                     
       covering Lots 9, 10, 11, and 12, E/2SW/4 Section 18-47N-91W.                                            
                                                                                                               
       Subject to C.A. NRM-1767 for Phosphoria Formation
       covering Lots 9, 10, 11, and 12, SE/4SW/4, NE/4SW/4                                                       
       Section 7-A7N-91W.                                                                                       

                                                                                                               
                                                                                                               
                                                                                                               

                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               

N/A    TOWNSHIP 47 NORTH, RANGE 91 WEST                                       W-6255-A             U.S.A.      
       Section 18: SE/4SW/4                                      40.00            HBP                All       
                                                                          Bass Lease 31104
       Subject to C.A. NRM-1195 for Phosphoria                                                                 
       Formation covering Lots 9, 10, 11, and 12,                                                             
       E/2SW/4 Section 18-47N-91W.
                                                                                                               
                                                                                                               
<CAPTION>
TRACT    LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST
 NO.       & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE
- -------------------------------------------------------------------------------------------------
<S>      <C>                           <C>                                <C>  
       

                                          Worland Associates                 FROM SURFACE TO BASE OF
                                                   .09000000                 PHOSPHORIA FORMATION AS TO
                                                                             SECTION 7 LANDS:
       
                                                                             Worland Associates
                                                                                     50.000000%
                                                                                    ------
                                                                             FROM SURFACE TO BASE OF
                                                                             PHOSPHORIA FORMATION:
                                                                             AS TO W/2 SECTION 29:

                                                                             Perry R. Bass, Inc.
                                                                                     25.00% x 4.84%
                                                                             Sid R. Bass, Inc.
                                                                                     18.75% x 4.84%
                                                                             Lee M. Bass, Inc.
                                                                                     18.75% x 4.84%
                                                                             Keystone, Inc.
                                                                                     18.75% x 4.84%
                                                                             Thru Line Inc.
                                                                                     18.75% x 4.84%
                                                                                 (Assignments Pending)
                                                                                      ******
N/A         Worland Associates            Raymond Chorney                    BELOW BASE OF PHOSPHORIA
                 100.000000%                       .02000000                 FORMATION:
                                                    ------
            FROM SURFACE TO BASE OF                                          Worland Associates
            PHOSPHORIA FORMATION:                                                       100.000000%
       
            Worland Associates
                 .10500000

</TABLE>
<PAGE>

NON-UNITIZED, PRODUCING                      EXHIBIT A-7          Page 9 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                       EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER    
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE     
- ----------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>              

            FEDERAL LANDS (CONT'D)

N/A    TOWNSHIP 46 NORTH, RANGE 91 WEST                                        W-0238809           U.S.A.       
       Section 17: SW/4SE/4                                      40.00            HBP               All        
       (Other lands in lease fall in No Water                             Bass Lease 31105
       Creek Unit)

N/A    TOWNSHIP 47 NORTH, RANGE 92 WEST                                        W-5444               U.S.A.      
       Section 13: NE/4, N/2SE/4,                               280.00            HBP                All        
                   SE/4SE/4                                               Bass Lease 31108
                                                                                                                
                                                                                                                

                                                                                                                
                                                                                                                

N/A    TOWNSHIP 47 NORTH, RANGE 91 WEST                                        W-0314025           U.S.A.       
       Section 19: Lots 7, 8, 9, and 10,                        302.80            HBP               All        
                   E/2SW/4                                                Bass Lease 31109                      
                                                                                                                
       TOWNSHIP 47 NORTH, RANGE 92 WEST
       Section 24: N/2NE/4, SE/4NE/4
       (Other lands in lease fall in S. Frisby
       Unit)

N/A    TOWNSHIP 46 NORTH, RANGE 91 WEST                                        W-0320416           U.S.A.       
       Section 7: Lot 6                                          43.31            HBP               All        
       (Other lands in lease fall in No Water                             Bass Lease 31110                                          
       Creek Unit)                                                                                              
                                                                                                                
                                                                                                                
                                                                                                                
<CAPTION>
TRACT LESSEE OF RECORD                OVERRIDING ROYALTY                 WORKING INTEREST
 NO.    & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE
- ----------------------------------------------------------------------------------------------
<S>   <C>                           <C>                                <C>  

     

N/A      Worland Associates            F. J. Bradshaw                     Worland Associates
              100.000000%                       .04000000                         100.000000%
     
     

N/A      Worland Associates            F. W. Crowley                      BELOW BASE OF PHOSPHORIA
              100.000000%                       .03000000                 FORMATION:
                                                ------
                                       FROM SURFACE TO BASE OF            Worland Associates
                                       PHOSPHORIA FORMATION:                      100.000000%

                                       Worland Associates
                                                .09500000
                                                ******
N/A      Worland Associates            Key Production Company, Inc.       Worland Associates
              100.00000000%                     .01500000                         100.000000%
                                       The LaCoy Family Trust
                                                .00500000
     
     
     
     

N/A      Worland Associates            Catherine A. Grieve                Worland Associates
              75.000000%                        .02000000                         75.000000%
                                       S.D. Ayers
                                                .01500000
                                       Legacy Energy Royalty Income
                                       Fund, Ltd.
                                                .01500000

</TABLE>
<PAGE>

NON-UNITIZED, PRODUCING                     EXHIBIT A-7          Page 10 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                      EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER    
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE     
- ----------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>              

            FEDERAL LANDS (CONT'D)

N/A    TOWNSHIP 43 NORTH, RANGE 92 WEST                                        W-8243               U.S.A.      
       Section 1: Lots 6, 10, and 11, SW/4,                     448.70          HBP                  All        
                  SW/4NE/4, SE/4NW/4,                                      Bass Lease 31111                      
                  W/2SE/4                                                                                     
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                

                                                                                                                
                                                                                                                

N/A    TOWNSHIP 47 NORTH, RANGE 92 WEST                                       W-0254904-A           U.S.A.      
       Section 11: All                                          640.00            HBP                All        
                                                                           Bass Leases 31116                    
                                                                               and 32635                        
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
<CAPTION>
TRACT LESSEE OF RECORD                OVERRIDING ROYALTY                 WORKING INTEREST
 NO.    & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE
- ----------------------------------------------------------------------------------------------
<S>   <C>                           <C>                                <C>  

     

N/A      Worland Associates            J. Perry                           AS TO LOT 6. SW/4NE/4.
              50.000000%                        .02000000                 SE/4NW/4 - ALL DEPTHS AND AS
                                       S. D. Ayers                        TO REMAINING LANDS BELOW BASE
                                                .01500000                 OF PHOSPHORIA FORMATION:
                                       A. W. Cullen
                                                .01500000                 Worland Associates
                                                ------                                50.000000%
                                       AS TO LOTS 10 AND 11, W/2SE/4, 
                                       SW/4 FROM SURFACE TO BASE OF
                                       PHOSPHORIA FORMATION:

                                       Worland Associates
                                                .05000000
                                                 ******
N/A      AS TO NW/4:                   W. H. Brown                        AS TO ALL LANDS EXCEPT SE/4
                                                .02500000                 NW/4 FROM SURFACE TO BASE OF
         Perry R. Bass, Inc.           Key Production Company, Inc.       PHOSPHORIA FORMATION:
              25.000000%                        .02500000
         Sid R. Bass, Inc.                                                Worland Associates
              18.750000%                                                          50.000000%
         Lee M. Bass, Inc.                                                Perry R. Bass, Inc.
              18.750000%                                                          12.500000%
         Keystone, Inc.                                                   Sid R. Bass, Inc.
              18.750000%                                                          9.375000%
         Thru Line Inc.                                                   Lee M. Bass, Inc.
              18.750000%                                                          9.375000%
              ------                                                      Keystone, Inc.
         AS TO NE/4, S/12:                                                        9.375000%
                                                                          Thru Line Inc.
         Worland Associates                                                       9.375000%
              50.000000%

</TABLE>
<PAGE>

NON-UNITIZING, PRODUCING                   EXHIBIT A-7          Page 11 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                      EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER    
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE     
- ----------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>              

            FEDERAL LANDS (CONT'D)
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                

N/A    TOWNSHIP 47 NORTH, RANGE 92 WEST                                       W-2607-A             U.S.A.       
       Section 1: Lots 1, 2, 3, and 4                           959.42           HBP                All        
                  S/2N/2, S/2                                              Bass Leases 31117,                     
       Section 12: N/2                                                     32634, and 41144                      
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
<CAPTION>
TRACT LESSEE OF RECORD                OVERRIDING ROYALTY                 WORKING INTEREST
 NO.    & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE
- ----------------------------------------------------------------------------------------------
<S>   <C>                           <C>                                <C>  

     
         Perry R. Bass, Inc.                                              AS TO SE/4NW/4 FROM
              12.500000%                                                  SURFACE TO BASE OF PHOSPHORIA
         Sid R. Bass, Inc.                                                FORMATION:
              9.375000%
         Lee M. Bass, Inc.                                                Worland Associates
              9.375000%                                                           5.000000%
         Keystone, Inc.
              9.375000%
         Thru Line Inc.
              9.375000%
               ******
N/A      Worland Associates            Key Production Company, Inc.       AS TO SECTION 1 LANDS:
              50.000000%                        .03375000                 BELOW BASE OF TENSLEEP:
         Perry R. Bass, Inc.           R. Scheere                         AS TO SECTION 12 NW/4 AS TO
              12.500000%                        .01125000                 ALL DEPTHS:
         Sid R. Bass, Inc.             James D. Beard, et ux
              9.375000%                         .00500000                 AS TO SECTION 12 NE/4 BELOW
         Lee M. Bass, Inc.                     ------                     BASE OF PHOSPHORIA FORMATION:
              9.375000%                AS TO SECTION 1 LANDS:
         Keystone, Inc.                SURFACE TO BASE OF                 Worland Associates
              9.375000%                PHOSPHORIA FORMATION:                      50.000000%
         Thru Line Inc.                                                   Perry R. Bass, Inc.
              9.375000%                Worland Associates                         12.500000%
                                                .01875000                 Sid R. Bass, Inc.
                                               ------                              9.375000%
                                       BASE OF PHOSPHORIA FORMATION       Lee M. Bass, Inc.
                                       TO BASE OF TENSLEEN FORMATION:              9.375000%
                                                                          Keystone, Inc.
                                       Worland Associates                         9.375000%
                                                .03750000                 Thru Line Inc.
                                                                                  9.375000%

</TABLE>
<PAGE>

NON-UNITIZED, PRODUCING                      EXHIBIT A-7         Page 12 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                       EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER    
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE     
- ----------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>              
       FEDERAL LANDS (CONT'D)
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
<CAPTION>
TRACT  LESSEE OF RECORD                OVERRIDING ROYALTY                 WORKING INTEREST
 NO.     & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE
- -----------------------------------------------------------------------------------------------
<S>    <C>                           <C>                                <C>  
      
                                        AS TO NE/4 SECTION 12 SURFACE      AS TO SECTION 1 LANDS FROM
                                        TO BASE OF PHOSPHORIA              SURFACE TO BASE OF PHOSPHORIA
                                        FORMATION:                         FORMATION:
                                                                                   SW/4:
                                        Worland Associates                 Perry R. Bass, Inc.
                                                 .06250000                         6.665000%
                                                                           Sid R. Bass, Inc.
                                        Convertible APO of Fed 1-12                4.998750%
                                        Well in NW/4NE/4 Section 12        Lee M. Bass, Inc.
                                        to 12.50% ORI or 25.00% WI.                4.998750%   
                                                                           Keystone, Inc.
                                        Perry R. Bass, Inc.                        4.998750%
                                                 .78125000%                Thru Line Inc.
                                        Sid R. Bass, Inc.                          4.998750%
                                                 .58593750%                        (Assignments Pending)
                                        Lee M. Bass, Inc.                          Lots 3 and 4, S/2NW/4:
                                                 .58593750%                Perry R. Bass, Inc.
                                        Keystone, Inc.                             1.210000%
                                                 .58593750%                Sid R. Bass, Inc.
                                        Thru Line Inc.                             0.907500%
                                                 .58593750%                Lee M. Bass, Inc.
                                                                                   0.907500%
                                                                           Keystone, Inc.
                                                                                   0.907500%
                                                                           Thru Line Inc.
                                                                                   0.907500%
                                                                                   (Assignments Pending)
                                                                                   Lots 1 and 2, S/2NE/4, SE/4
                                                                           Perry R. Bass, Inc.
                                                                                   5.682500%
                                                                           Sid R. Bass, Inc.
                                                                                   4.261875%

</TABLE>
<PAGE>

NON-UNITIZED, PRODUCING                    EXHIBIT A-7           Page 13 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                     EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER    
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE     
- ----------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>              

            FEDERAL LANDS (CONT'D)                                                                              
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                

N/A    TOWNSHIP 47 NORTH, RANGE 92 WEST                                        W-4190               U.S.A.      
       Section 14: N/2                                          880.00           HBP                 All        
       Section 15: E/2, S/2NW/4, SW/4                                      Bass Leases 31118
                                                                               and 41146                        
                                                                                                                

                                                                                                                
                                                                                                                
                                                                                                                

                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                

N/A    TOWNSHIP 47 NORTH, RANGE 92 WEST                                       W-0314025-B           U.S.A.      
       Section 13: W/2                                          320.00            HBP                All        
                                                                           Bass Leases 31119                    
                                                                               and 32637                        
<CAPTION>
TRACT LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST
 NO.    & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE
- ----------------------------------------------------------------------------------------------
<S>   <C>                           <C>                                <C>  

                                                                          Lee M. Bass, Inc
                                                                                  4.261875%
                                                                          Keystone, Inc.
                                                                                  4.261875%
                                                                          Thru Line Inc.
                                                                                  4.261875%
                                                                          (Assignments Pending)
                                                                                    ******
N/A      Worland Associates            FROM SURFACE TO BASE OF            AS TO ALL LANDS BELOW BASE
              50.000000%               PHOSPHORIA FORMATION:              OF PHOSPHORIA FORMATION:
     
                                       Worland Associates                 Worland Associates
                                                .06250000                         50.000000%
                                                                                    ------
                                                                          AS TO NE/4 SECTION 14 FROM
                                                                          SURFACE DOWN TO BASE OF
                                                                          PHOSPHORIA FORMATION:

                                                                          Perry R. Bass, Inc.
                                                                                  6.665000%
                                                                          Sid R. Bass, Inc.
                                                                                  4.998750%
                                                                          Lee M. Bass, Inc.
                                                                                  4.998750%
                                                                          Keystone, Inc.
                                                                                  4.998750%
                                                                          Thru Line Inc.
                                                                                  4.998750%
                                                                          (Assignments Pending)
                                                                                    ******
N/A      Worland Associates            Key Production Company, Inc.       Worland Associates
              50.000000%                        .03750000                         50.000000%
         Perry R. Bass, Inc.           The James F. LaCoy FamiIy          Perry R. Bass, Inc.
              12.500000%               Trust   .01250000                          12.500000%

</TABLE>
<PAGE>

NON-UNITIZED, PRODUCING                     EXHIBIT A-7          Page 14 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                       EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER     
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE      
- -----------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>               

            FEDERAL LANDS (CONT'D)

                                                                                                                 
                                                                                                                 
                                                                                                                 
                                                                                                                 
                                                                                                                 
                                                                                                                 
                                                                                                                 
                                                                                                                 

N/A    TOWNSHIP 47 NORTH, RANGE 92 WEST                                        W-0187646           U.S.A.        
       Section 2: Lots 1, 2, 3, and 4,                          319.95            HBP               All          
                  S/2N/2                                                   Bass Leases 31120                     
                                                                               and 32636                         
                                                                                                                 
                                                                                                                 
                                                                                                                 
                                                                                                                 
                                                                                                                 
                                                                                                                 
                                                                                                                 
                                                                                                                 

N/A    TOWNSHIP 47 NORTH, RANGE 92 WEST                                         W-11773             U.S.A.       
       Section 23: SE/4NE/4, NE/4SE/4                           120.00            HBP                All         
       Section 24: NW/4SW/4                                               Bass Lease 31121
       (Other lands in lease fall in S. Frisby
       Unit)

N/A    TOWNSHIP 47 NORTH, RANGE 92 WEST                                         W-11774             U.S.A.       
       Section 23: SE/4SE/4                                     240.00            HBP                All         
       Section 24: S/25W/4                                                Bass Lease 31122
       Section 25: N/2NW/4, SE/4NW/4                                                                             

<CAPTION>
TRACT LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST
 NO.    & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE
- ----------------------------------------------------------------------------------------------
<S>   <C>                           <C>                                <C>  



         Sid R. Bass, Inc.                                                Sid R. Bass, Inc.
              9.375000%                                                           9.375000%
         Lee M. Bass, Inc.                                                Lee M. Bass, Inc.
              9.375000%                                                           9.375000%
         Keystone, Inc.                                                   Keystone, Inc.
              9.375000%                                                           9.375000%
         Thru Line Inc.                                                   Thru Line Inc.
              9.375000%                                                           9.375000%
              ******                                                               ****** 
N/A      Worland Associates            Westmont Engineering Co.           Worland Associates
              50.000000%                        .05000000                        50.000000%
         Perry R. Bass, Inc.                                              Perry R. Bass, Inc.
              12.500000%                                                         12.500000%
         Sid R. Bass, Inc.                                                Sid R. Bass, Inc.
              9.375000%                                                           9.375000%
         Lee M. Bass, Inc.                                                Lee M. Bass, Inc.
              9.375000%                                                           9.375000%
         Keystone, Inc.                                                   Keystone, Inc.
              9.375000%                                                           9.375000%
         Thru Line Inc.                                                   Thru Line Inc.
              9.375000%                                                           9.375000%
              ******                                                               ******
N/A      Worland Associates                   None                        Worland Associates
              100.000000%                                                       100.000000%



N/A      Worland Associates            FROM SURFACE TO BASE OF            BELOW BASE OF PHOSPHORIA
              100.000000%              PHOSPHORIA FORMATION:              FORMATION:
      
      

</TABLE>
<PAGE>

NON-UNITIZED, PRODUCING                     EXHIBIT A-7          Page 15 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                      EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER    
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE     
- ----------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>              

       FEDERAL LANDS (CONT'D)

                                                                                                                
                                                                                                                

N/A    TOWNSHIP 47 NORTH, RANGE 92 WEST                                         W-11775             U.S.A.      
       Section 25: SW/4NE/4                                      40.00            HBP                All        
       (Other Lands in lease fall in S. Frisby                             Bass Lease 31123
       Unit)                                                                                                    
                                                                                                                

N/A    TOWNSHIP 45 NORTH, RANGE 92 WEST                                         W-18806             U.S.A.      
       Section 19: Lots 5 and 6, E/2E/2,                        280.00            HBP                All        
                   NW/4NE/4                                                Bass Lease 31130

N/A    TOWNSHIP 46 NORTH, RANGE 92 WEST                                        W-0319221            U.S.A.       
       Section 2: SE/4NE/4, E/2SE/4,                            160.00            HBP                All        
                  SW/4SE/4                                                 Bass Leases 31142                    
                                                                               and 34078                        
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
<CAPTION>
TRACT   LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST
 NO.      & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE
- ------------------------------------------------------------------------------------------------
<S>     <C>                           <C>                                <C>  

     

                                         Worland Associates                 Worland Associates
                                                  .03000000-.07500000               100.000000%
                                                        ******                        ******
N/A        Worland Associates            FROM SURFACE TO BASE OF            BELOW BASE OF PHOSPHORIA
                100.000000%              PHOSPHORIA FORMATION:              FORMATION:
     
                                         Worland Associates                 Worland Associates
                                                  .10250000-.15500000               100.000000%
                                                        ******                        ******

N/A        Worland Associates                     None                      Worland Associates
                100.000000%                                                         100.000000%
                  ******                                ******                        ******

N/A        Perry R. Bass, Inc.           FROM SURFACE DOWN TO 150 FEET      FROM SURFACE DOWN TO 150 FEET
                25.000000%               BELOW TOP OF PHOSPHORIA            BELOW TOP OF PHOSPHORIA
           Sid R. Bass, Inc.             FORMATION:                         FORMATION:
                18.750000%
           Lee M. Bass, Inc.                      .05000000-.0625000        Worland Associates
                18.750000%                        Owned by:                         100.000000%
           Keystone, Inc.                Perry R. Bass, Inc.                          ------
                18.750000%                        25.00%                    BELOW:
           Thru Line Inc.                Sid R. Bass, Inc.
                18.750000%                        18.75%                    Perry R. Bass, Inc.
                                         Lee M. Bass, Inc.                          25.000000%
                                                  18.75%                    Sid R. Bass, Inc.
                                         Keystone, Inc.                             18.750000%
                                                  18.75%                    Lee M. Bass, Inc.
                                         Thru Line Inc.                             18.750000%
                                                  18.75%                    Keystone, Inc.
                                                                                    18.750000%
                                                                            Thru Line Inc.
                                                                                    18.750000%

</TABLE>
<PAGE>

NON-UNITIZED, PRODUCING                    EXHIBIT A-7           Page 16 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                      EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER    
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE     
- ----------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>              

            FEDERAL LANDS (CONT'D)

N/A    TOWNSHIP 47 NORTH, RANGE 91 WEST                                        W-30870             U.S.A.       
       Section 18: Lot 12, NE/4SW/4                             240.00           HBP                 All        
       Section 19: N/2SE/4, SE/4SE/4                                      Bass Lease 31143                      
       Section 30: NE/4NE/4                                                                                     
                                                                                                                
       Subject to C.A. NRM-1 195 for Phosphoria Formation                                                       
       covering Lots 9, 10, 11, and 12, E/2SW/4 Section 18-47N-91W.
                                                                                                                
       Subject to C.A. NRM-1737 for Phosphoria Formation                                                        
       covering the NE/4 Section 30-47N-91W.

       Subject to C.A. NRM-1736 for Phosphoria Formation
       covering the SE/4 Section 19-47N-91W.

N/A    TOWNSHIP 47 NORTH, RANGE 92 WEST                                        W-7168               U.S.A.      
       Section 27: NE/4, S/2NW/4, S/2                           720.00           HBP                 All        
       Section 28: SE/4                                                    Bass Leases 31145                    
                                                                               and 41147                        
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
<CAPTION>
TRACT  LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST
 NO.     & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE
- -----------------------------------------------------------------------------------------------
<S>    <C>                           <C>                                <C>  

      

N/A       Worland Associates            Doreen Smith                       AS TO SECTION 18 LANDS BELOW
               100.000000%                       .02000000                 BASE OF PHOSPHORIA FORMATION
                                                   ------                  AND REMAINING LANDS:
                                        AS TO SECTION 18 LANDS FROM
                                        SURFACE TO BASE OF PHOSPHORIA      Worland Associates  
                                        FORMATION:                                 100.000000% 
      
                                        Worland Associates
                                                 .10500000
      

      
      

N/A       Worland Associates            Marvin Wolf                        BELOW BASE OF PHOSPHORIA
               100.000000%                       .03000000                 FORMATION:
                                        John J. Pedry
                                                 .01000000                 Worland Associates
                                                   ------                          100.000000%
                                        FROM SURFACE TO BASE OF                      ------
                                        PHOSPHORIA FORMATION:              AS TO SW/4 SECTION 27 FROM
                                                                           SURFACE TO BASE OF
                                        Worland Associates                 PHOSPHORIA FORMATION:
                                                 .08500000
                                                                           Perry R. Bass, Inc.
                                                                                   6.665000%
                                                                           Sid R. Bass, Inc.
                                                                                   4.998750%
                                                                           Lee M. Bass, Inc.
                                                                                   4.998750%
                                                                           Keystone, Inc.
                                                                                   4.998750%
                                                                           Thru Line Inc.
                                                                                   4.998750%
                                                                           (Assignments Pending)

</TABLE>
<PAGE>

NON-UNITIZED, PRODUCING                    EXHIBIT A-7           Page 17 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                      EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER   
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE    
- ---------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>             

            FEDERAL LANDS (CONT'D)
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               

N/A    TOWNSHIP 47 NORTH, RANGE 91 WEST                                         W-44255             U.S.A.     
       Section 19: SW/4SE/4                                     320.00            HBP                All       
       Section 30: NW/4NE/4, S/2NE/4, SE/4                                Bass Lease 31147
                                                                                                               
       Subject to C.A. NRM-1736 for Phosphoria Formation                                                       
       covering the SE/4 Section 19-47N-91W.                                                                   
                                                                                                               
       Subject to C.A. NRM-1737 for Phosphoria Formation                                                       
       covering the NE/4 Section 30-47N-91W.
                                                                                                               
                                                                                                               

N/A    TOWNSHIP 46 NORTH, RANGE 92 WEST                                       W-49937             U.S.A.      
       Section 25: Lot 4, W/2NW/4,                              280.06          HBP                All      
                   SE/4NW/4, NE/4SW/4,                                    Bass Lease 31148
                   W/2SE/4
                                                                                                               
<CAPTION>
TRACT   LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST
 NO.      & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE
- ------------------------------------------------------------------------------------------------
<S>     <C>                           <C>                                <C>  

      
                                                                            AS TO SE/4 SECTION 28 FROM
                                                                            SURFACE TO BASE OF PHOSPHORIA
                                                                            FORMATION:
                                                                            Perry R. Bass, Inc.
                                                                                    1.210000%
                                                                            Sid R. Bass, Inc.
                                                                                    0.907500%
                                                                            Lee M. Bass, Inc.
                                                                                    0.907500%
                                                                            Keystone, Inc.
                                                                                    0.907500%
                                                                            Thru Line Inc.
                                                                                    0.907500%
                                                                            (Assignments Pending )
                                                                                    ******
N/A        Worland Associates            James O. Shetterly, Jr.            AS TO SE/4 SECTION 30:
                100.000000%                       .03000000                 FROM SURFACE TO 10.890 FEET:
      
                                         *Worland has a .065 ORI in         Worland Associates
                                         Schetterly #1-30 Well BPO,                 40.000000% *
                                         convertible to 40% WI APO.                 ------
                                                                            BELOW 10,890 FEET AND
                                                                            REMAINING LANDS:
      
                                                                            Worland Associates
                                                                                   100.000000%
                                                                                    ******
N/A        Worland Associates            Mary B. Sprinkle                   BELOW BASE OF PHOSPHORIA
                100.000000%                       .05000000                 FORMATION:
      
                                         FROM SURFACE TO BASE OF            Worland Associates
                                         PHOSPHORIA FORMATION:                      100.000000%

</TABLE>
<PAGE>

NON-UNITIZED, PRODUCING                    EXHIBIT A-7           Page 18 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                      EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER     
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE      
- -----------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>               


       FEDERAL LANDS (CONT'D)
                                                                                                                 
                                                                                                                 
                                                                                                                 
                                                                                                                 
                                                                                                                 

N/A    TOWNSHIP 47 NORTH, RANGE 92 WEST                                         W-59507             U.S.A.       
       Section 25: SW/4SE/4                                      40.00            HBP                All         
                                                                          Bass Lease 31150
                                                                                                                 
                                                                                                                 

                                                                                                                 
                                                                                                                 


N/A    TOWNSHIP 47 NORTH, RANGE 91 WEST                                         W-66869             U.S.A.       
       Section 7: NE/4SW/4                                       40.00            HBP                All         
                                                                          Bass Lease 31151
       Subject to C.A. NRM-1767 for Phosphoria
       Formation covering Lots 9, 10, 11, and 12,
       SE/4SW/4, NE/4SW/4 Section 7-47N-91 W.

N/A    TOWNSHIP 45 NORTH, RANGE 92 WEST                                         W-77143             U.S.A.       
       Section 19: Lots 13, 14, 15, 16, 23,                     360.00            HBP                All         
                   and 24, SW/4NE/4,                                      Bass Lease 31152
                   W/2SE/4

N/A    TOWNSHIP 46 NORTH, RANGE 91 WEST                                        W-8232               U.S.A.       
       Section 10: N/2                                          320.00            HBP                All         
                                                                           Bass Leases 31153                     
                                                                               and 34081                         
                                                                                                                 
                                                                                                                 
                                                                                                                 
                                                                                                                 
<CAPTION>
TRACT LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST
 NO.    & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE
- ----------------------------------------------------------------------------------------------
<S>   <C>                           <C>                                <C>  


      
                                       Worland Associates
                                                .12500000% *
                                       * Convertible to like working
                                         interest when average monthly
                                         production less than or equal to
                                         15 BOPD per well.
                                                  ******
N/A      Worland Associates            G. William Hurley                  BELOW BASE OF PHOSPHORIA
              100.000000%                       .04000000                 FORMATION:
                                                  ------
                                       FROM SURFACE TO BASE OF            Worland Associates
                                       PHOSPHORIA FORMATION:                      100.000000%

                                       Worland Associates
                                                .10000000
                                                  ******

N/A      Worland Associates                     None                      Worland Associates
              75.000000%                                                          75.000000%
      
      
      
      

N/A      Worland Associates                     None                      Worland Associates
              100.000000%                                                         100.000000%
                ******                                                              ******
      

N/A      Perry R. Bass, Inc.           Worland Associates                 Perry R. Bass, Inc.
              25.000000%                        .01972400                         25.000000%
         Sid R. Bass, Inc.             Cottonwood Properties              Sid B. Bass, Inc.
              18.750000%                        .01000000                         18.750000%
         Lee M. Bass, Inc.             Guy R. Campbell                    Lee M. Bass, Inc.
              18.750000%                        .00500000                         18.750000%
         Keystone, Inc.                Guy R. Campbell, Jr. & Co.         Keystone, Inc.
              18.750000%                        .00500000                         18.750000%

</TABLE>
<PAGE>

NON-UNITIZED, PRODUCING                   EXHIBIT A-7            Page 19 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                     EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER   
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE    
- ---------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>             

       FEDERAL LANDS (CONT'D)


                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               

N/A    TOWNSHIP 47 NORTH, RANGE 91 WEST                                       W-021469             U.S.A.      
       Section 28: NE/4                                         160.00            HBP                All       
                                                                          Bass Lease 31939                     
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
<CAPTION>
TRACT  LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST
 NO.     & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE
- -----------------------------------------------------------------------------------------------
<S>    <C>                           <C>                                <C>  

     


          Thru Line Inc.                K&B Company                        Thru Line Inc.
               18.750000%                        .00500000                         18.750000%
                                        Wheatley Oil Co.
                                                 .00500000
                                        Anna Stark
                                                 .00027600
                                                  ******
N/A       Frank Elliott, Trustee        Frank Elliott, Trustee             AS TO S/2NE/4, NE/4NE/4
               50.000000%                        .06250000                 FROM SURFACE TO 10,485 FEET:
          Edna Ione Hall, Trustee       Edna Ione Hall, Trustee
               50.000000%                        .06250000                 Perry R. Bass, Inc.
                                                  ------                           25.000000%
                                        AS TO NW/4NE/4 FROM SURFACE        Sid R. Bass, Inc.
                                        TO 10,485 FEET:                            18.750000%
                                                                           Lee M. Bass, Inc.
                                        Sid R. Bass, Inc.                          18.750000%
                                                 .00937500                 Keystone, Inc.
                                        Lee M. Bass, Inc.                          18.750000%
                                                 .00937500                 Thru Line Inc.
                                                                                   18.750000%
                                                                                     ------
                                                                           AS TO NW/4NE/4  FROM SURFACE
                                                                           TO 10485 FEET:

                                                                           Perry R. Bass, Inc.
                                                                                   25.000000%
                                                                           Sid R. Bass, Trustee
                                                                                   18.750000%
</TABLE>
<PAGE>

NON-UNITIZED, PRODUCING                    EXHIBIT A-7           Page 20 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                     EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER   
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE    
- ---------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>             

            FEDERAL LANDS (CONT'D)

                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               

N/A    TOWNSHIP 47 NORTH, RANGE 90 WEST                                         W-45484             U.S.A.     
       Section 32: E/2SE/4                                       80.00            HBP                All       
                                                                          Bass Lease 33353                     
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               

N/A    TOWNSHIP 46 NORTH, RANGE 91 WEST                                        W-0283968           U.S.A.      
       Section 5: S/2SW/4                                        80.00            HBP                All       
       (Other lands in lease fall in No Water                             Bass Lease 34080                     
       Creek Unit)                                                                                             
                                                                                                               

                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
<CAPTION>
TRACT   LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST
 NO.      & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE
- ------------------------------------------------------------------------------------------------
<S>     <C>                           <C>                                <C>  

      

                                                                            Lee M. Bass
                                                                                    18.750000%
                                                                            Keystone, Inc.
                                                                                    18.750000%
                                                                            Thru Line Inc.
                                                                                    18.750000%
                                                                                     ******
N/A        Perry R. Bass, Inc.           Associated Royalty Co.             Perry R. Bass, Inc.
                25.000000%                        .04000000                         25.000000%
           Sid R. Bass, Inc.                                                Sid R. Bass, Inc.
                18.750000%                                                         18.750000%
           Lee M. Bass, Inc.                                                Lee M. Bass, Inc.
                18.750000%                                                          18.750000%
           Keystone, Inc.                                                   Keystone, Inc.
                18.750000%                                                          18.750000%
           Thru Line Inc.                                                   Thru Line Inc.
                18.750000%                                                          18.750090%
                 ******                                                              ******
N/A        Perry R. Bass, Inc.           A. M. Culver                       Perry R. Bass, Inc.
                25.000000%                        .03000000                         25.000000%
           Sid R. Bass, Inc.                                                Sid R. Bass, Inc.
                18.750000%                                                          18.750000%
           Lee M. Bass, Inc.                                                Lee M. Bass, Inc.
                18.750000%                                                          18.750000%
           Keystone, Inc.                                                   Keystone, Inc.
                18.750000%                                                          18.750000%
           Thru Line Inc.                                                   Thru Line Inc.
                18.750000%                                                          18.750000%
</TABLE>
<PAGE>

                                                                   

NON-UNITIZED, PRODUCING                      EXHIBIT A-7         Page 21 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                      EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER   
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE    
- ---------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>             

            FEDERAL LANDS (CONT'D)


N/A    TOWNSHIP 47 NORTH, RANGE 91 WEST                                       W-084518             U.S.A.      
       Section 31: Lots 5, 6, 7, 8, 9, 10, and                407.52             HBP                All       
       11, E/2NW/4, NE/4                                                  Bass Lease 34082                     
       (Other lands in lease fall in No Water                                                                  
       Creek Unit)                                                                                             
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               

                                                                                                               
                                                                                                               

                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
<CAPTION>
TRACT    LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST
 NO.       & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE
- -------------------------------------------------------------------------------------------------
<S>      <C>                           <C>                                <C>  

       


N/A         Perry R. Bass, Inc.           Arta A. Connaghan                  AS TO LOTS 5 AND 8. E/2NW/4
                 25.000000%                        .01350000                 BELOW 10,847 FEET AND ALL
            Sid R. Bass, Inc.             Erving Wolf                        DEPTHS TO REMAINING LANDS:
                 18.750000%                        .00500000
            Lee M. Bass, Inc.             Geo Winston Nelson, Jr.            Perry R. Bass, Inc.
                 18.7500000%                       .00450000                         25.000000%
            Keystone, Inc.                Elizabeth V. Nelson Taylor         Sid R. Bass, Inc.
                 18.750000%                        .00450000                         18.750000%
            Thru Line Inc.                April A. Nelson Winter             Lee M. Bass, Inc.
                 18.750000%                        .00450000                         18.750000%
                                          Betty B. Shaffer                   Keystone, Inc.
                                                   .00300000                         18.750000%
                                                    ------                   Thru Line Inc.
                                          AS TO LOTS 5 AND 8, E/2NW/4                18.750000%
                                          FROM SURFACE TO 10,847 FEET:

                                          .0500000-.0900000 OWNED AS
                                                   FOLLOWS:

                                          Perry R. Bass, Inc.
                                                   25.0000000
                                          Sid R. Bass, Inc.
                                                   18.7500000
                                          Lee M. Bass, Inc.
                                                   18.7500000
                                          Keystone, Inc.
                                                   18.7500000
                                          Thru Line Inc.
                                                   18.7500000

</TABLE>
<PAGE>

NON-UNITIZED, PRODUCING                       EXHIBIT A-7       Page 22 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                       EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER   
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE    
- ---------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>             

            FEDERAL LANDS (CONT'D)

N/A    TOWNSHIP 48 NORTH, RANGE 92 WEST                                      WYW-121343             U.S.A.     
       Section 24: E/2SW/4, SE/4                                240.00            HBP                All       
       (Other lands in lease fall in Treasure                             Bass Lease 34752                     
       Prospect)                                                                                               
                                                                                                               
       Subject to C.A. WYW-112025 for Phosphoria                                                               
       Formation covering All of Section 24-48N-92W.                                                           
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               

                                                                                                               
                                                                                                               

                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
<CAPTION>
TRACT  LESSEE OF RECORD                OVERRIDING ROYALTY                 WORKING INTEREST
 NO.     & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE
- -----------------------------------------------------------------------------------------------
<S>    <C>                           <C>                                <C>  

     

N/A       Perry R. Bass, Inc.           FROM SURFACE TO BASE OF            AS TO ALL DEPTHS EXCEPT THE
               25.000000%               PHOSPHORIA FORMATION IN THE        PHOSPHORIA FORMATION (9,680
          Sid R. Bass, Inc.             NW/4SE/4 SECTION 24; AND,          FEET TO 9,976 FEET) IN THE E/2
               18.750000%               AS TO THE PHOSPHORIA FORMATION     SW/4, E/2SE/4. SW/4SE/4
          Lee M. Bass, Inc.             (9,680 FEET TO 9,976 FEET) IN THE  SECTION 24; AND BELOW THE
               18.750000%               E/2SW/4, E/2SE/4. SW/4SE/4         PHOSPHORIA FORMATION IN THE
          Keystone, Inc.                SECTION 24:                        NW/4SE/4 SECTION 24:
               18.750000%
          Thru Line Inc.                BEFORE PAYOUT OF 1-H BASS          Perry R. Bass, Inc.
               18.750000%               FEDERAL #33-24 WELL:                       25.000000%
                                                                           Sid R. Bass, Inc.
                                        Perry R. Bass, Inc.                        18.750000%
                                                 .02125000                 Lee M. Bass, Inc.
                                        Sid R. Bass, Inc.                          18.750000%
                                                 .01593750                 Keystone, Inc.
                                        Lee M. Bass, Inc.                          18.750000%
                                                 .01593750                 Thru Line Inc.
                                        Keystone, Inc.                             18.750000%
                                                 .01593750
                                        Thru Line Inc.
                                                 .01593750
                                                  ------
                                        AFTER PAYOUT OF 1-H BASS
                                        FEDERAL #33-24 WELL:

                                        Perry R. Bass, Inc.
                                                 .03875000
                                        Sid R. Bass, Inc.
                                                 .02906250
                                        Lee M. Bass, Inc.
                                                 .02906250

</TABLE>
<PAGE>

NON-UNITIZED, PRODUCING                      EXHIBIT A-7         Page 23 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                      EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER   
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE    
- ---------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>             
            FEDERAL LANDS (CONT'D)

                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               

N/A    TOWNSHIP 48 NORTH, RANGE 92 WEST                                         W-83731             U.S.A      
       Section 24: NE/4NW/4, W/2W/2                             200.00            HBP                All       
       (Other lands in lease fall in Treasure                             Bass Lease 35173                     
       Prospect)                                                                                               
                                                                                                               
       Subject to C.A. WYW-112025 for Phosphoria                                                               
       Formation covering All of Section 24-48N-92W.                                                           
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               

N/A    TOWNSHIP 47 NORTH, RANGE 91 WEST                                        W-44461              U.S.A.     
       Section 18: SE/4NE/4, NW/4SE/4,                          160.00            HBP                All       
       S/2SE/4                                                            Bass Lease 38791
                                                                                                               
                                                                                                               
                                                                                                               
                                                                                                               
<CAPTION>
TRACT  LESSEE OF RECORD                OVERRIDING ROYALTY                 WORKING INTEREST
 NO.     & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE
- -----------------------------------------------------------------------------------------------
<S>    <C>                           <C>                                <C>  
     

                                        Keystone, Inc.
                                                 .02906250
                                        Thru Line Inc.
                                                 .02906250
                                                  ******
N/A       Perry R. Bass, Inc.           Mary B. Sprinkle                   AS TO ALL DEPTHS EXCEPT THE
               25.000000%                        .06250000                 PHOSPHORIA FORMATION (9,680
          Sid R. Bass, Inc.             Union Oil Company of Calif.        FEET TO 9,976 FEET):
               18.750000%                        .02250000
          Lee M. Bass, Inc.                       ------                   Perry R. Bass, Inc.
               18.750000%               AFTER PAYOUT OF 1-H BASS                   25.000000%
          Keystone, Inc.                FEDERAL #33-24 WELL AS TO          Sid R. Bass, Inc.
               18.750000%               PHOSPHORIA FORMATION:                      18.750000%
          Thru Line Inc.                                                   Lee M. Bass, Inc.
               18.750000%               Perry R. Bass, Inc.                        18.750000%
                                                 .01750000                 Keystone, Inc.
                                        Sid R. Bass, Inc.                          18.750000%
                                                 .01312500                 Thru Line Inc.
                                        Lee M. Bass,Inc.                           18.750000%
                                                 .01312500
                                        Keystone, Inc.
                                                 .01312500
                                        Thru Line, Inc.
                                                 .01312500
                                                  ******
N/A      -------------------            Brent Exploration Co.              FROM SURFACE DOWN TO 10,590
                                                 .02000000                 FEET:
                ******
                                                                           Perry R. Bass, Inc.
                                                                                   2.500000%
                                                                           Sid R. Bass, Inc.
                                                                                   1.875000%

</TABLE>
<PAGE>

                                                                   

NON-UNITIZED, PRODUCING                       EXHIBIT A-7        Page 24 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                        EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER     
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE      
- -----------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>               

       FEDERAL LANDS (CONT'D)


                                                                                                                 
                                                                                                                 
                                                                                                                 
                                                                                                                 
                                                                                                                 
                                                                                                                 

N/A    TOWNSHIP 47 NORTH, RANGE 90 WEST                                         W-45482             U.S.A.       
       Section 29: NE/4SW/4                                      40.00            HBP                All         
                                                                          Bass Lease 38849                       
                                                                                                                 
                                                                                                                 
                                                                                                                 
                                                                                                                 
                                                                                                                 
                                                                                                                 
                                                                                                                 

N/A    TOWNSHIP 46 NORTH, RANGE 92 WEST                                         W-71852             U.S.A.       
       Section 11: E/2NW/4, SW/4NW/4,                           200.00            HBP                All         
                   W/2SW/4                                                Bass Lease 40725                       
                                                                                                                 
                                                                                                                 
                                                                                                                 
                                                                                                                 
                                                                                                                 
                                                                                                                 
<CAPTION>
TRACT LESSEE OF RECORD                OVERRIDING ROYALTY                 WORKING INTEREST
 NO.    & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE
- ----------------------------------------------------------------------------------------------
<S>   <C>                           <C>                                <C>  

      


                                                                          Lee M. Bass, Inc.
                                                                                  1.875000%
                                                                          Keystone, Inc.
                                                                                  1.875000%
                                                                          Thru Line Inc.
                                                                                  1.875000%
                                                                                   ******
N/A             ------                 Perry R. Bass, Inc.                         ------
                                                .00125000
                                       Sid R. Bass, Inc.
                                                .00093750
                                       Lee M. Bass, Inc.
                                                .00093750
                                       Keystone, Inc.
                                                .00093750
                                       Thru Line Inc.
                                                .00093750
                                                 ******
N/A      Herbaly Petroleum Corp.       Herbaly Petroleum Corp.            Perry R. Bass, Inc.
              100.000000%                       .03000000                         25.000000%
                                                                          Sid R. Bass, Inc.
                                                                                  18.750000%
                                                                          Lee M. Bass, Inc.
                                                                                  18.750000%
                                                                          Keystone, Inc.
                                                                                  18.750000%
                                                                          Thru Line Inc.
                                                                                  18.750000%

</TABLE>
<PAGE>

NON-UNITIZED, PRODUCING                      EXHIBIT A-7         Page 25 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                       EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER    
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE     
- ----------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>              

        STATE LANDS


N/A    TOWNSHIP 47 NORTH, RANGE 91 WEST                                         70-5767            State of     
       Section 36: S/2NW/4, SW/4                                240.00            HBP              Wyoming      
       (Other lands in lease fall in Cotton-                               Bass Leases 21328        100%        
       wood Creek Field Extension                                              and 38853                        
       (Phosphoria) Unit)                                                                                       
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                

N/A    TOWNSHIP 47 NORTH, RANGE 92 WEST                                         66-4412            State of     
       Section 36: N/2, E/2SW/4, SE/4                           560.00            HBP              Wyoming      
                                                                           Bass Leases 31114        100%        
                                                                               and 41143                        
                                                                                                                
                                                                                                                

                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                

                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
<CAPTION>
TRACT  LESSEE OF RECORD              OVERRIDING ROYALTY                 WORKING INTEREST
 NO.     & PERCENTAGE                  & DECIMAL INTEREST                   & PERCENTAGE
- -----------------------------------------------------------------------------------------------
<S>    <C>                           <C>                                <C>  

      


N/A       D. W. Genpar, Inc.            Key Production Co.,Inc.            D. W. Genpar, Inc.
               25.000000%                        .05750000                         25.000000%
          Sid R. Bass, Inc.             Donald & Dorothy M. Vail           Sid R. Bass, Inc.
               18.750000%                        .00500000                         18.750000%  
          Lee M. Bass, Inc.                                                Lee M. Bass, Inc.
               18.750000%                                                          18.750000%
          Keystone, Inc.                                                   Keystone, Inc.
               18.750000%                                                          18.750000%
          Thru Line Inc.                                                   Thru Line Inc.
               18.750000%                                                          18.750000%
                ******                                                              ******
N/A       Worland Associates            Estate of Raymond Chorney,         AS TO N/2 BELOW BASE OF
               50.000000%               deceased  .02500000                PHOSPHORIA FORMATION AND AS
                                        John J. Pedry                      TO ALL DEPTHS IN REMAINING LANDS:
                                                 .02000000
                                        Arden R. Boland                    Worland Associates
                                                 .00500000                         50.000000%
                                                                                    ------
                                        AS TO N/2 FROM SURFACE DOWN        AS TO NE/4 FROM SURFACE TO
                                        TO BASE OF PHOSPHORIA FORMA-       10,903 FEET:
                                        TION (10,903 FEET):
                                                                           Bass Enterprises Production Co.
                                        Worland Associates                         26.666640% *
                                                 .03750000                 (Assignments Pending.)
                                                                                    ------
                                        * This interest also burdened      AS TO NW/4:
                                          with 26.66664/76.625 of:
                                          8/11 x 1/3 x 50% x 7.5% -        Bass Enterprises Production Co.
                                          Worland Associates (part of              22.736810% **
                                          3.75% above)                     (Assignments Pending.)
                                          8/11 x 1/3 x 25% x 12.5% - The

</TABLE>
<PAGE>

NON-UNITIZED, PRODUCING                       EXHIBIT A-7        Page 26 of 26
WASHAKIE COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                       EFFECTIVE JANUARY 1, 1998

<TABLE>
<CAPTION>
TRACT                                                            NO.                           ROYALTY OWNER    
 NO.   DESCRIPTION OF LAND                                      ACRES       SERIAL NUMBER      & PERCENTAGE     
- ----------------------------------------------------------------------------------------------------------------
<S>    <C>                                                      <C>       <C>                  <C>              

       STATE LANDS (CONT'D)
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                

N/A    TOWNSHIP 48 NORTH, RANGE 92 WEST                                       74-17879            State of      
       Section 36: All                                          640.00            HBP              Wyoming      
                                                                          Bass Lease 39639          100%        
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
                                                                                                                
 
<CAPTION>
TRACT   LESSEE OF RECORD                OVERRIDING ROYALTY                      WORKING INTEREST
 NO.      & PERCENTAGE                  & DECIMAL INTEREST                        & PERCENTAGE
- ------------------------------------------------------------------------------------------------
<S>     <C>                           <C>                                       <C>

       
                                         Prudential Group, Inc.
                                         .496875% - W. R. Grace
                                         **This interest also burdened with 
                                           22.73681/25 of:
                                           Surface to 10,903 feet:
                                           1/2 x 3.125% - The Prudential
                                           Group, Inc.
                                           1/2 x 3.75% - Worland Associates
                                           (part of 3.75% above)
                                           7.5% x 7.5% - W. R. Grace
                                           Below 10,903;
                                           3.125% - The Prudential Group, Inc.
                                                    ******
N/A        D. W. Genpar, Inc.            Donald C. Grotjan                      D. W. Genpar, Inc.
                25.000000%                        .03000000                           25.000000%
           Sid R. Bass, Inc.                                                    Sid R. Bass, Inc.
                18.750000%                                                            18.750000%
           Lee M. Bass, Inc.                                                    Lee M. Bass, Inc.
                18.750000%                                                            18.750000%
           Keystone, Inc.                                                       Keystone, Inc.
                18.750000%                                                            18.750000%
           Thru Line Inc.                                                       Thru Line Inc.
                18.750000%                                                            18.750000%
</TABLE>

<PAGE>
                                                                    Page 1 of 1
<TABLE>
<CAPTION>

NON-UNITIZED, NON-PRODUCING                          EXHIBIT A-8
BIG HORN COUNTY, WYOMING          PURCHASE AND SALE AGREEMENT DATED____________, 1998
                                               EFFECTIVE JANUARY 1, 1998



TRACT                                       NO.        SERIAL NO. &   ROYALTY OWNER  
 NO.    DESCRIPTION OF LAND                ACRES     EXPIRATION DATE  & PERCENTAGE   
- ------------------------------------------------------------------------------------
<S>  <C>                                  <C>       <C>               <C>            
               FEDERAL LANDS

N/A  TOWNSHIP 51 NORTH, RANGE 92 WEST                  WYW-141305         U.S.A    
     Section 31: E/2NE/4, SE/4             553.77       03/31/2007           All   
     Section 32: E/2NE/4, W/2SE/4                   Bass Lease 40901               
     Section 33: Lots 4 and 5, W/2SW/4                                             
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   

<CAPTION>
TRACT   LESSEE OF RECORD         OVERRIDING ROYALTY           WORKING INTEREST
 NO.      & PERCENTAGE           & DECIMAL INTEREST             & PERCENTAGE
- -----------------------------------------------------------------------------------
<S>   <C>                      <C>                            <C>
     

N/A  Perry R. Bass, Inc.               None                   Perry R. Bass, Inc.
                   25.00%                                                  25.00%
     Sid R. Bass, Inc.                                        Sid R. Bass, Inc.
                   18.75%                                                  18.75%
     Lee M. Bass, Inc.                                        Lee M. Bass, Inc.
                   18.75%                                                  18.75%
     Keystone, Inc.                                           Keystone, Inc.
                   18.75%                                                  18.75%
     Thru Line Inc.                                           Thru Line Inc.
                   18.75%                                                  18.75%
</TABLE>

<PAGE>

                                                                    Page 1 of 4
<TABLE>
<CAPTION>

NON-UNITIZED, NON-PRODUCING                         EXHIBIT A-9
WASHAKIE COUNTY, WYOMING         PURCHASE AND SALE AGREEMENT DATED____________, 1998
                                              EFFECTIVE JANUARY 1, 1998



TRACT                                       NO.        SERIAL NO. &   ROYALTY OWNER
 NO.    DESCRIPTION OF LAND                ACRES     EXPIRATION DATE  & PERCENTAGE 
- -----------------------------------------------------------------------------------
<S>  <C>                                  <C>       <C>               <C>          
          FEDERAL LANDS (CONT'D)

N/A  TOWNSHIP 47 NORTH, RANGE 90 WEST                  WYW-132963         U.S.A.   
     Section 20: NE/4                     160.00       07/31/2004          All     
                                                    Bass Lease 39402               
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   

N/A  TOWNSHIP 46 NORTH, RANGE 91 WEST                  WYW-133662         U.S.A.   
     Section 1: N/2SE/4                    80.00       09/30/2004          All     
                                                    Bass Lease 39435               
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   

N/A  TOWNSHIP 47 NORTH, RANGE 92 WEST                  WYW-141293         U.S.A    
     Section 14: SW/4                     160.00       03/31/2007          All     
                                                    Bass Lease 40900               
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
                                                                                   
<CAPTION>
TRACT   LESSEE OF RECORD         OVERRIDING ROYALTY           WORKING INTEREST     
 NO.      & PERCENTAGE           & DECIMAL INTEREST             & PERCENTAGE       
- -----------------------------------------------------------------------------------
<S>  <C>                       <C>                            <C>                  
     

N/A  Perry R. Bass, Inc.         None                         Perry R. Bass, Inc.  
                   25.00%                                                  25.00%  
     Sid R. Bass, Inc.                                        Sid R. Bass, Inc.    
                   18.75%                                                  18.75%  
     Lee M. Bass, Inc.                                        Lee M. Bass, Inc.    
                   18.75%                                                  18.75%  
     Keystone, Inc.                                           Keystone, Inc.       
                   18.75%                                                  18.75%  
     Thru Line Inc.                                           Thru Line Inc.       
                   18.75%                                                  18.75%  
              ******                                                   ******      

N/A  Perry R. Bass, Inc.         None                         Perry R. Bass, Inc.  
                   25.00%                                                  25.00%  
     Sid R. Bass, Inc.                                        Sid R. Bass, Inc.    
                   18.75%                                                  18.75%  
     Lee M. Bass, Inc.                                        Lee M. Bass, Inc.    
                   18.75%                                                  18.75%  
     Keystone, Inc.                                           Keystone, Inc.       
                   18.75%                                                  18.75%  
     Thru Line Inc.                                           Thru Line Inc.       
                   18.75%                                                  18.75%  
              ******                                                   ******      

N/A  Perry R. Bass, Inc.         None                         Perry R. Bass, Inc.  
                   25.00%                                                  25.00%  
     Sid R. Bass, Inc.                                        Sid R. Bass, Inc.    
                   18.75%                                                  18.75%  
     Lee M. Bass, Inc.                                        Lee M. Bass, Inc.    
                   18.75%                                                  18.75%  
     Keystone, Inc.                                           Keystone, Inc.       
                   18.75%                                                  18.75%  
     Thru Line Inc.                                           Thru Line Inc.       
                   18.75%                                                  18.75%  

</TABLE>

<PAGE>

                                                                     Page 2 of 4
<TABLE>
<CAPTION>

NON-UNITIZED, NON-PRODUCING                         EXHIBIT A-9
WASHAKIE COUNTY, WYOMING         PURCHASE AND SALE AGREEMENT DATED____________, 1998
                                              EFFECTIVE JANUARY 1, 1998



TRACT                                         NO.        SERIAL NO. &           ROYALTY OWNER        
 NO.    DESCRIPTION OF LAND                  ACRES     EXPIRATION DATE          & PERCENTAGE         
- -----------------------------------------------------------------------------------------------------
<S>  <C>                                    <C>        <C>                    <C>                    
          FEE LANDS

N/A  TOWNSHIP 47 NORTH, RANGE 92 WEST                    06/16/2000 *          Templin Farms Inc.    
     Section 29: SW/4                       160.00    Bass Lease 41235              12.50%           
     Recorded in Micro Book 74, Page 2181                                                            
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     

N/A  TOWNSHIP 47 NORTH, RANGE 92 WEST                   06/17/2000 *      Geraldine M. Burton, et vir
     Section 32: W/2SW/4                     80.00     Bass Lease 41236A            12.50%           
     Recorded in Micro Book 74, Page 2179                                                            
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     

N/A  TOWNSHIP 47 NORTH, RANGE 92 WEST                    07/12/2000 *         Dale A. Black, et ux   
     Section 32: W/2SW/4                    (80.00)   Bass Lease 41236B              12.50%          
     Recorded in Micro Book 75, Page 420                                                             
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                         * Option to extend for two (2) years.              
                                                                                                     
<CAPTION>
TRACT  LESSEE OF RECORD          OVERRIDING ROYALTY          WORKING INTEREST     
 NO.    & PERCENTAGE             & DECIMAL INTEREST            & PERCENTAGE       
- --------------------------------------------------------------------------------- 
<S>   <C>                       <C>                       <C>


N/A   Perry R. Bass, Trustee           None               Perry R. Bass, Trustee  
                      25.00%                                             25.00%   
      Sid R. Bass, Inc.                                   Sid R. Bass, Inc.       
                      18.75%                                             18.75%   
      Lee M. Bass, Inc.                                   Lee M. Bass, Inc.       
                      18.75%                                             18.75%   
      Keystone, Inc.                                      Keystone, Inc.          
                      18.75%                                             18.75%   
      Thru Line Inc.                                      Thru Line Inc.          
                      18.75%                                             18.75%   
               ******                                              ******         

N/A   Perry P. Bass, Trustee    None                      Perry R. Bass, Trustee  
                      25.00%                                             25.00%   
      Sid R. Bass, Inc.                                   Sid R. Bass, Inc.       
                      18.75%                                             18.75%   
      Lee M. Bass, Inc.                                   Lee M. Bass, Inc.       
                      18.75%                                             18.75%   
      Keystone, Inc.                                      Keystone, Inc.          
                      18.75%                                             18.75%   
      Thru Line Inc.                                      Thru Line Inc.          
                      18.75%                                             18.75%   
               ******                                              ******         

N/A   Perry R. Bass, Trustee    None                      Perry R. Bass, Trustee  
                      25.00%                                             25.00%   
      Sid R. Bass, Inc.                                   Sid R. Bass, Inc.       
                      18.75%                                             18.75%   
      Lee M. Bass, Inc.                                   Lee M. Bass, Inc.       
                      18.75%                                             18.75%   
      Keystone, Inc.                                      Keystone, Inc.          
                      18.75%                                             18.75%   
      Thru Line Inc.                                      Thru Line Inc.          
                      18.75%                                             18.75%   

</TABLE>

<PAGE>


                                                                    Page 3 of 4
<TABLE>
<CAPTION>

NON-UNITIZED, NON-PRODUCING                         EXHIBIT A-9
WASHAKIE COUNTY, WYOMING         PURCHASE AND SALE AGREEMENT DATED____________, 1998
                                              EFFECTIVE JANUARY 1, 1998



TRACT                                         NO.        SERIAL NO. &           ROYALTY OWNER        
 NO.    DESCRIPTION OF LAND                  ACRES     EXPIRATION DATE          & PERCENTAGE         
- -----------------------------------------------------------------------------------------------------
<S>  <C>                                    <C>        <C>                  <C>                      
          FEE LANDS (CONT'D)

N/A  TOWNSHIP 47 NORTH  RANGE 92 WEST                     07/03/2000*       Charles W. Kraft, et ux  
     Section 32: W/2NW/4, NE/4NW/4          120.00     Bass Lease 41406A            12.50%           
     Recorded in Micro Book 75, Page 1655                                                            
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     

N/A  TOWNSHIP 47 NORTH, RANGE 92 WEST                    07/03/2000*        Jerry L. Hastings, et ux 
     Section 32: W/2NW/4, NE/4NW/4         (120.00)   Bass Lease 41406B              12.50%          
     Recorded in Micro Book 75, Page 1653                                                            
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     

N/A  TOWNSHIP 47 NORTH, RANGE 92 WEST                     07/03/2000*       The J. Donald & Marjorie 
     Section 32: W/2NW/4, NE/4NW/4         (120.00)   Bass Lease 41406C          H. Colby Trust      
     Recorded in Micro Book 75, Page 1651                                           12.50%           
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                  * Option to extend for two (2) years.              
                                                                                                     
<CAPTION>
TRACT  LESSEE OF RECORD          OVERRIDING ROYALTY          WORKING INTEREST    
 NO.    & PERCENTAGE             & DECIMAL INTEREST            & PERCENTAGE      
- ---------------------------------------------------------------------------------
<S>   <C>                       <C>                        <C>
     

N/A   Perry R. Bass, Trustee            None              Perry R. Bass, Trustee 
                      25.00%                                             25.00%  
      Sid R. Bass, Inc.                                   Sid R. Bass, Inc.      
                      18.75%                                             18.75%  
      Lee M. Bass, Inc.                                   Lee M. Bass, Inc.      
                      18.75%                                             18.75%  
      Keystone, Inc.                                      Keystone, Inc.         
                      18.75%                                             18.75%  
      Thru Line Inc.                                      Thru Line Inc.         
                      18.75%                                             18.75%  
               ******                                              ******        

N/A   Perry R. Bass, Trustee            None              Perry R. Bass, Trustee 
                      25.00%                                             25.00%  
      Sid R. Bass, Inc.                                   Sid R. Bass, Inc.      
                      18.75%                                             18.75%  
      Lee M. Bass, Inc.                                   Lee M. Bass, Inc.      
                      18.75%                                             18.75%  
      Keystone, Inc.                                      Keystone, Inc.         
                      18.75%                                             18.75%  
      Thru Line Inc.                                      Thru Line Inc.         
                      18.75%                                             18.75%  
               ******                                              ******        

N/A   Perry R. Bass, Trustee            None              Perry R. Bass, Trustee 
                      25.00%                                             25.00%  
      Sid R. Bass, Inc.                                   Sid R. Bass, Inc.      
                      18.75%                                             18.75%  
      Lee M. Bass, Inc.                                   Lee M. Bass, Inc.      
                      18.75%                                             18.75%  
      Keystone, Inc.                                      Keystone, Inc.         
                      18.75%                                             18.75%  
      Thru Line Inc.                                      Thru Line Inc.         
                      18.75%                                             18.75%  
</TABLE>

<PAGE>


                                                                    Page 4 of 4
<TABLE>
<CAPTION>

NON-UNITIZED, NON-PRODUCING                         EXHIBIT A-9
WASHAKIE COUNTY, WYOMING         PURCHASE AND SALE AGREEMENT DATED____________, 1998
                                              EFFECTIVE JANUARY 1, 1998



TRACT                                         NO.        SERIAL NO. &           ROYALTY OWNER        
 NO.    DESCRIPTION OF LAND                  ACRES     EXPIRATION DATE          & PERCENTAGE         
- -----------------------------------------------------------------------------------------------------
<S>  <C>                                    <C>        <C>                    <C>                    
          FEE LANDS (CONT'D)

N/A  TOWNSHIP 47 NORTH, RANGE 92 WEST                     07/03/2000*      Wesley W. Hastings, et ux 
     Section 32: W/2NW/4, NE/4NW/4         (120.00)   Bass Lease 41406D              12.50%          
     Recorded in Micro Book 75, Page 1943                                                            
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     

N/A  TOWNSHIP 47 NORTH, RANGE 92 WEST                      07/03/2000*       Roger D. Hastings, et ux 
     Section 32: W/2NW/4, NE/4NW/4         (120.00)   Bass Lease 41406E              12.50%          
     Recorded in Micro Book 75, Page 1945                                                            
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                                                                     
                                                  * Option to extend for two (2) years.

<CAPTION>
TRACT  LESSEE OF RECORD          OVERRIDING ROYALTY          WORKING INTEREST    
 NO.    & PERCENTAGE             & DECIMAL INTEREST            & PERCENTAGE      
- ---------------------------------------------------------------------------------
<S>   <C>                       <C>                       <C>                    
     

N/A   Perry R. Bass, Trustee            None              Perry R. Bass, Trustee 
                      25.00%                                             25.00%  
      Sid R. Bass, Inc.                                   Sid R. Bass, Inc.      
                      18.75%                                             18.75%  
      Lee M. Bass, Inc.                                   Lee M. Bass, Inc.      
                      18.75%                                             18.75%  
      Keystone, Inc.                                      Keystone, Inc.         
                      18.75%                                             18.75%  
      Thru Line Inc.                                      Thru Line Inc.         
                      18.75%                                             18.75%  
               ******                                              ******        

N/A   Perry R. Bass, Trustee            None              Perry R. Bass, Trustee 
                      25.00%                                             25.00%  
      Sid R. Bass, Inc.                                   Sid R. Bass, Inc.      
                      18.75%                                             18.75%  
      Lee M. Bass, Inc.                                   Lee M. Bass, Inc.      
                      18.75%                                             18.75%  
      Keystone, Inc.                                      Keystone, Inc.         
                      18.75%                                             18.75%  
      Thru Line Inc.                                      Thru Line Inc.         
                      18.75%                                             18.75%  

</TABLE>

<PAGE>


                                                                    Page 1 of 2
<TABLE>
<CAPTION>

EAST LAMB PROSPECT                            EXHIBIT A-10
BIG HORN COUNTY, WYOMING   PURCHASE AND SALE AGREEMENT DATED____________, 1998
                                       EFFECTIVE JANUARY 1, 1998



TRACT                                        NO.        SERIAL NUMBER           ROYALTY OWNER       
 NO.   DESCRIPTION OF LAND                  ACRES     & EXPIRATION DATE         & PERCENTAGE        
- ----------------------------------------------------------------------------------------------------
<S>  <C>                                  <C>        <C>                        <C>                 
          FEDERAL LANDS

N/A  TOWNSHIP 51 NORTH, RANGE 92 WEST                    WYW-142156                  U.S.A.         
     Section 4:  S/2N/2, S/2              1,425.98       07/31/2007                   All           
     Section 9:  Lots 1-3                             Bass Lease 41150                              
     Section 11: Tract 61B                                                                          
     Section 14: Tract 61B, 61C, 61D,                                                               
                 61E, 61F, 61G, 61H, 61I                                                            
     Section 15: Lot 4, N/2, Tract 55A,                                                             
                 55B, 55C, 61I, 61J                                                                 
     Section 16: Tract 55C                                                                          
                                                                                                    
                                                                                                    

N/A  TOWNSHIP 52 NORTH, RANGE 92 WEST                    WYW-142158                  U.S.A          
     Section 26: SW/4                     1,674.72       07/31/2007                   All           
     Section 27: All                                  Bass Lease 41151                              
     Section 34: Lots 1-3, N/2NE/4,                                                                 
                 SW/4NE/4, W/2, Tract                                                               
                 38C, 38D, 65C, 65D
     Section 35: Lots 1-4, Tract 38A,                                                               
                 38B, 38C, 64A, 65A,                                                                
                 65B, 65C                                                                           
                                                                                                    
                                                                                                    
                                                                                                    

N/A  TOWNSHIP 52 NORTH, RANGE 92 WEST                    WYW-140640                  U.S.A          
     Section 34: SE/4NE/4                    76.07       01/31/2007                   All           
     Section 35: Lot 5                                Bass Lease 41237                              
                                                                                                    
                                                                                                    
                                                                                                    

<CAPTION>
TRACT       LESSEE OF RECORD            OVERRIDING ROYALTY        WORKING INTEREST
 NO.          & PERCENTAGE              & DECIMAL INTEREST         & PERCENTAGE
- ---------------------------------------------------------------------------------------
<S>         <C>                         <C>                      <C>
     

N/A          Perry R. Bass, Inc.               None              Perry R. Bass, Inc.
                             25.00%                                             25.00%
             Sid R. Bass, Inc.                                   Sid R. Bass, Inc.
                             18.75%                                             18.75%
             Lee M. Bass, Inc.                                   Lee M. Bass, Inc.
                             18.75%                                             18.75%
             Keystone, Inc.                                      Keystone, Inc.
                             18.75%                                             18.75%
             Thru Line Inc.                                      Thru Line Inc.
                             18.75%                                             18.75%
                     ******                                             ******

N/A          Perry R. Bass, Inc.               None              Perry R. Bass, Inc.
                             25.00%                                             25.00%
             Sid R. Bass, Inc.                                   Sid R. Bass, Inc.
                             18.75%                                             18.75%
             Lee M. Bass, Inc.                                   Lee M. Bass, Inc.
                             18.75%                                             18.75%
             Keystone, Inc.                                      Keystone, Inc.
                             18.75%                                             18.75%
             Thru Line Inc.                                      Thru Line Inc.
                             18.75%                                             18.75%
                     ******                                              ******

N/A          Perry R. Bass, Inc.       F. S. DiGrappa            Perry R. Bass, Inc.
                             25.00%                    .015000                  25.00%
             Sid R. Bass, Inc.         Thomas L. DiGrappa        Sid R. Bass, Inc.
                             18.75%                    .015000                  18.75%
             Lee M. Bass, Inc.         Richard D. Robertson      Lee M. Bass, Inc.
                             18.75%                    .010000                  18.75%

</TABLE>
<PAGE>

                                                                    Page 2 of 2

<TABLE>
<CAPTION>

EAST LAMB PROSPECT                                  EXHIBIT A-10
BIG HORN COUNTY, WYOMING         PURCHASE AND SALE AGREEMENT DATED____________, 1998
                                             EFFECTIVE JANUARY 1, 1998



TRACT                                        NO.          SERIAL NO.            ROYALTY OWNER       
 NO.          DESCRIPTION OF LAND           ACRES     & EXPIRATION DATE         & PERCENTAGE        
- ----------------------------------------------------------------------------------------------------
<S>  <C>                                   <C>        <C>                       <C>                 
          FEDERAL LANDS (CONT'D)

                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    

N/A  TOWNSHIP 51 NORTH, RANGE 92 WEST                    WYW-141297                  U.S.A          
     Section 4: Lots 5, 6, 7, 8           1,697.92       03/31/2007                   All           
     Section 6: Lots 8-21, S/2NE/4, SE/4              Bass Lease 41238                              
     Section 7: Lots 5-11, Lot 16, E/2,                                                             
                E/2 of Lots 12 and 15                                                                          
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
 
N/A  TOWNSHIP 51 NORTH, RANGE 92 WEST                    WYW-141298                  U.S.A          
     Section 8: Lots 1 and 2, N/2, SW/4,  1,116.05       03/31/2007                   All           
                N/2SE/4                               Bass Lease 41239                              
     Section 9: N/2, N/25/2                                                                         
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
<CAPTION>
TRACT  LESSEE OF RECORD           OVERRIDING ROYALTY        WORKING INTEREST     
 NO.     & PERCENTAGE             & DECIMAL INTEREST         & PERCENTAGE        
- ---------------------------------------------------------------------------------
<S>    <C>                       <C>                      <C>                   
     

       Keystone, Inc.                                      Keystone, Inc.        
                       18.75%                                             18.75% 
       Thru Line Inc.                                      Thru Line Inc.        
                       18.75%                                             18.75% 
               ******                                              ******        

N/A    Perry R. Bass, Inc.       F. S. DiGrappa            Perry R. Bass, Inc.   
                       25.00%                    .015000                  25.00% 
       Sid R. Bass, Inc.         Thomas L. DiGrappa        Sid R. Bass, Inc.     
                       18.75%                    .015000                  18.75% 
       Lee M. Bass, Inc.         Richard D. Robertson      Lee M. Bass, Inc.     
                       18.75%                    .010000                  18.75% 
       Keystone, Inc.                                      Keystone, Inc.        
                       18.75%                                             18.75% 
       Thru Line Inc.                                      Thru Line Inc.        
                       18.75%                                             18.75% 
               ******                                              ******        
 
N/A    Perry R. Bass, Inc.       F. S. DiGrappa            Perry R. Bass, Inc.   
                       25.00%                    .015000                  25.00% 
       Sid R. Bass, Inc.         Thomas L. DiGrappa        Sid R. Bass, Inc.     
                       18.75%                    .015000                  18.75% 
       Lee M. Bass, Inc.         Richard D. Robertson      Lee M. Bass, Inc.     
                       18.75%                    .010000                  18.75% 
       Keystone, Inc.                                      Keystone, Inc.        
                       18.75%                                             18.75% 
       Thru Line Inc.                                      Thru Line Inc.        
                       18.75%                                             18.75% 
</TABLE>

<PAGE>

                                                                    Page 1 of 2
<TABLE>
<CAPTION>

HONEYCOMB PROSPECT                                EXHIBIT A-11
WASHAKIE COUNTY, WYOMING      PURCHASE AND SALE AGREEMENT DATED____________, 1998
                                           EFFECTIVE JANUARY 1, 1998



TRACT                                        NO.        SERIAL NUMBER           ROYALTY OWNER       
 NO.          DESCRIPTION OF LAND           ACRES     & EXPIRATION DATE         & PERCENTAGE        
- ----------------------------------------------------------------------------------------------------
<S>  <C>                                  <C>         <C>                       <C>                 
          FEDERAL LANDS

N/A  TOWNSHIP 46 NORTH, RANGE 90 WEST                    WYW-140294                  U.S.A.         
     Section 3: S/2                       1,360.00       11/30/2006                   All           
     Section 9: All                                   Bass Lease 40785                              
     Section 10: W/2, W/2NE/4                                                                       
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
 
N/A  TOWNSHIP 46 NORTH, RANGE 90 WEST                    WYW-140295                  U.S.A          
     Section 4: Lots 5-16, S/2N/2, S/2    1,179.16       11/30/2006                   All           
     Section 5: Lots 5, 6, 11-14, S/2NE/4             Bass Lease 40786                              
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    

N/A  TOWNSHIP 46 NORTH, RANGE 90 WEST                    WYW-140296                  U.S.A          
     Section 5: S/2                       1,185.10       11/30/2006                   All           
     Section 6: Lot 22, SE/4SW/4, S/2SE/4             Bass Lease 40787                              
     Section 7: N/2NE/4, SE/4NE/4                                                                   
     Section 8: Lots 2-4, N/2S/2, N/2                                                                
                                                                                                    

<CAPTION>
TRACT   LESSEE OF RECORD           OVERRIDING ROYALTY        WORKING INTEREST     
 NO.     & PERCENTAGE             & DECIMAL INTEREST         & PERCENTAGE        
- ----------------------------------------------------------------------------------
<S>     <C>                       <C>                      <C>                    
     

N/A     Perry R. Bass, Inc.             None                Perry R. Bass, Inc.   
                        25.00%                                             25.00% 
        Sid R. Bass, Inc.                                   Sid R. Bass, Inc.     
                        18.75%                                             18.75% 
        Lee M. Bass, Inc.                                   Lee M. Bass, Inc.     
                        18.75%                                             18.75% 
        Keystone, Inc.                                      Keystone, Inc.        
                        18.75%                                             18.75% 
        Thru Line Inc.                                      Thru Line Inc.        
                        18.75%                                             18.75% 
                ******                                              ******        
 
N/A     Perry R. Bass, Inc.             None                Perry R. Bass, Inc.
                        25.00%                                             25.00%
        Sid R. Bass, Inc.                                   Sid R. Bass, Inc.
                        18.75%                                             18.75%
        Lee M. Bass, Inc.                                   Lee M. Bass, Inc.
                        18.75%                                             18.75%
        Keystone, Inc.                                      Keystone, Inc.
                        18.75%                                             18.75%
        Thru Line Inc.                                      Thru Line Inc.
                        18.75%                                             18.75%
                ******                                              ******

N/A     Perry R. Bass, Inc.             None                Perry R. Bass, Inc.
                        25.00%                                             25.00%
        Sid R. Bass, Inc.                                   Sid R. Bass, Inc.
                        18.75%                                             18.75%
        Lee M. Bass, Inc.                                   Lee M. Bass, Inc.
                        18.75%                                             18.75%

</TABLE>

<PAGE>
                                                                    Page 2 of 2
<TABLE>
<CAPTION>

HONEYCOMB PROSPECT                                      EXHIBIT A-11
WASHAKIE COUNTY, WYOMING            PURCHASE AND SALE AGREEMENT DATED____________, 1998
                                                 EFFECTIVE JANUARY 1, 1998



TRACT                                        NO.          SERIAL NO.            ROYALTY OWNER       
 NO.          DESCRIPTION OF LAND           ACRES     & EXPIRATION DATE         & PERCENTAGE        
- ----------------------------------------------------------------------------------------------------
<S>  <C>                                   <C>        <C>                       <C>                 

          FEDERAL LANDS (CONT'D)

                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    

              STATE LANDS

N/A  TOWNSHIP 46 NORTH, RANGE 90 WEST                St. of Wy-96-00430            St. of WY        
     Tract 40 (Formerly All of Section 16)  640.00       12/01/2001                   All           
                                                      Bass Lease 40777                              
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    

<CAPTION>                                                                                           
TRACT     LESSEE OF RECORD            OVERRIDING ROYALTY        WORKING INTEREST     
 NO.        & PERCENTAGE              & DECIMAL INTEREST         & PERCENTAGE        
- -------------------------------------------------------------------------------------
<S>        <C>                       <C>                      <C>                    

     

           Keystone, Inc.                                      Keystone, Inc.        
                           18.75%                                             18.75% 
           Thru Line Inc.                                      Thru Line Inc.        
                           18.75%                                             18.75% 
                   ******                                              ******       

     

N/A        Perry R. Bass, Trustee            None              Perry R. Bass, Trustee
                           25.00%                                             25.00% 
           Sid R. Bass, Inc.                                   Sid R. Bass, Inc.     
                           18.75%                                             18.75% 
           Lee M. Bass, Inc.                                   Lee M. Bass, Inc.     
                           18.75%                                             18.75% 
           Keystone, Inc.                                      Keystone, Inc.        
                           18.75%                                             18.75% 
           Thru Line Inc.                                      Thru Line Inc.        
                           18.75%                                             18.75% 


</TABLE>

<PAGE>


                                                                    Page 1 of 2
<TABLE>
<CAPTION>

MARCONI PROSPECT                                EXHIBIT A-12
WASHAKIE COUNTY, WYOMING       PURCHASE AND SALE AGREEMENT DATED____________, 1998
                                           EFFECTIVE JANUARY 1, 1998



TRACT                                        NO.          SERIAL NO.            ROYALTY OWNER        
 NO.          DESCRIPTION OF LAND           ACRES     & EXPIRATION DATE         & PERCENTAGE         
- ----------------------------------------------------------------------------------------------------
<S>  <C>                                   <C>        <C>                       <C>                 
          FEDERAL LANDS
                                                                                                    
                                                                                                    

N/A  TOWNSHIP 46 NORTH, RANGE 91 WEST                      B-039524                  U.S.A.          
     Section 4: Lots 5-16, S/2N/2 S/2     1,209.08            HBP                     All           
                                                        Bass Leases 31100,    
     TOWNSHIP 47 NORTH, RANGE 91 WEST                    31529, and 34084     
     Section 33: S/2                                                                                
     (Other lands in lease fall in Non-Unitized,                                                    
     Producing)                                                                                     
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    

                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    

<CAPTION>
TRACT    LESSEE OF RECORD            OVERRIDING ROYALTY          WORKING INTEREST               
 NO.       & PERCENTAGE              & DECIMAL INTEREST           & PERCENTAGE                  
- ----------------------------------------------------------------------------------------------
<S>       <C>                       <C>                          <C>                          
     
                                                                 AS TO SECTION 4: LOTS 11-16, 
                                       AS TO ALL LANDS:                S/2N/2, S/2            

N/A       Perry R. Bass, Inc.       Worland Associates           Perry R. Bass, Inc.          
                          25.00%                    .019724                     25.000%       
          Sid R. Bass, Inc.         Cottonwood Properties        Sid R. Bass, Inc.            
                          18.75%                    .010000                     18.750%       
          Lee M. Bass, Inc.         Guy R. Campbell              Lee M. Bass, Inc.            
                          18.75%                    .005000                     18.750%       
          Keystone, Inc.            Guy R. Campbell, Jr. & Co.   Keystone, Inc.               
                          18.75%                    .005000                     18.750%       
          Thru Line Inc.            K&B Company                  Thru Line Inc.               
                          18.75%                    .005000                     18.750%       
                                    Wheatley Oil Co.                   ------                 
                                                    .005000         REMAINING LANDS:          
                                    Anna Stack                                                
                                                    .000276      Worland Associates           
                                          ------                            50.00% *          

                                                                 Perry R. Bass, Inc.          
                                                                                12.500%       
                                    * BURDENS ONLY WORLAND'S     Sid R. Bass, Inc.            
                                    INTEREST: Worland Associates                 9.375%       
                                    .03125  NOTE: Historically,  Lee M. Bass, Inc.            
                                    ORI has not merged into WI.                  9.375%       
                                                                 Keystone, Inc.               
                                                                                 9.375%       
                                                                 Thru Line Inc.               
                                                                                 9.375%       
</TABLE>

<PAGE>

                                                                    Page 2 of 2
<TABLE>
<CAPTION>

MARCONI PROSPECT                                 EXHIBIT A-12
WASHAKIE COUNTY, WYOMING       PURCHASE AND SALE AGREEMENT DATED____________, 1998
                                            EFFECTIVE JANUARY 1, 1998



TRACT                                        NO.          SERIAL NO.            ROYALTY OWNER       
 NO.          DESCRIPTION OF LAND           ACRES     & EXPIRATION DATE         & PERCENTAGE        
- ----------------------------------------------------------------------------------------------------
<S>  <C>                                   <C>        <C>                       <C>                 
          FEDERAL LANDS (CONT'D)

N/A  TOWNSHIP 46 NORTH, RANGE 91 WEST                     W-088064                  U.S.A.          
     Section 5: Lots 5, 6, 11, 12, 13, and  284.37           HBP                     All           
                14, S/2NE/4                           Bass Lease 34079                              
     (Other lands in lease fall in No Water                                                         
     Creek Unit.)                                                                                   
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    

<CAPTION>
TRACT    LESSEE OF RECORD            OVERRIDING ROYALTY        WORKING INTEREST         
 NO.       & PERCENTAGE              & DECIMAL INTEREST         & PERCENTAGE            
- ----------------------------------------------------------------------------------------
<S>       <C>                       <C>                      <C>                        
     

N/A       Perry R. Bass, Inc.       Estate of Gordon Hurd,       Perry R. Bass, Inc.    
                          25.00%    deceased       .030000                      25.000% 
          Sid R. Bass, Inc.                                      Sid R. Bass, Inc.      
                          18.75%                                                18.750% 
          Lee M. Bass, Inc.                                      Lee M. Bass, Inc.      
                          18.75%                                                18.750% 
          Keystone, Inc.                                         Keystone, Inc.         
                          18.75%                                                18.750% 
          Thru Line Inc.                                         Thru Line Inc.         
                          18.75%                                                18.750% 
</TABLE>

<PAGE>


                                                                    Page 1 of 1
<TABLE>
<CAPTION>

NW ZIMMERMAN PROSPECT                             EXHIBIT A-13
HOT SPRINGS COUNTY, WYOMING       PURCHASE AND SALE AGREEMENT DATED____________, 1998
                                            EFFECTIVE JANUARY 1, 1998



TRACT                                        NO.          SERIAL NO.            ROYALTY OWNER        
 NO.          DESCRIPTION OF LAND           ACRES     & EXPIRATION DATE         & PERCENTAGE         
- -----------------------------------------------------------------------------------------------------
<S>  <C>                                    <C>       <C>                       <C>                  
          FEDERAL LANDS


N/A  TOWNSHIP 44 NORTH, RANGE 94 WEST                    WYW-136569                  U.S.A.           
     Section 1:  Lots 6, 7, W/2SE/4         885.22       06/30/2005                   All             
     Section 12: Lots 4-6, 9, N/2NE/4, SE/4           Bass Lease 40885                                
     Section 13: E/2NE/4, NW/4, NW/4SW/4,                                                             
                 NE/4SE/4                                                                             
                                                                                                      
                                                                                                      
                                                                                                      
                                                                                                      
                                                                                                      
                                                                                                      

N/A  TOWNSHIP 44 NORTH, RANGE 93 WEST                    WYW-136570                  U.S.A            
     Section 5: SW/4                        2,057.74     06/30/2005                   All             
     Section 6: Lots 5-7, S/2NE/4,                    Bass Lease 40886                                
                SE/4NW/4, E/2SW/4, SE/4
     Section 7: Lots 1-10, E/2SW/4, SE/4                                                              
     Section 8: Lots 3-6, S/2                                                                         
     Section 18: Lots 1, 2, NE/4, E/2NW/4                                                             
                                                                                                      
                                                                                                      
                                                                                                     
<CAPTION>
TRACT         LESSEE OF RECORD            OVERRIDING ROYALTY         WORKING INTEREST      
 NO.            & PERCENTAGE              & DECIMAL INTEREST           & PERCENTAGE
- --------------------------------------------------------------------------------------------
<S>          <C>                       <C>                          <C>                     
     


N/A          Perry R. Bass, Inc.       The Wallway Revocable Trust  Perry R. Bass, Inc.      
                             25.00%                    .030000                      25.00%   
             Sid R. Bass, Inc.                                      Sid R. Bass, Inc.        
                             18.75%                                                 18.75%   
             Lee M. Bass, Inc.                                      Lee M. Bass, Inc.        
                             18.75%                                                 18.75%   
             Keystone, Inc.                                         Keystone, Inc.           
                             18.75%                                                 18.75%   
             Thru Line Inc.                                         Thru Line Inc.           
                             18.75%                                                 18.75%   
                     ******                                                 ******           

N/A          Perry R. Bass, Inc.       The Wallway Revocable Trust  Perry R. Bass, Inc.      
                             25.00%                    .030000                      25.00%   
             Sid R. Bass, Inc.                                      Sid R. Bass, Inc.        
                             18.75%                                                 18.75%   
             Lee M. Bass, Inc.                                      Lee M. Bass, Inc.        
                             18.75%                                                 18.75%   
             Keystone, Inc.                                         Keystone, Inc.           
                             18.75%                                                 18.75%   
             Thru Line Inc.                                         Thru Line Inc.           
                             18.75%                                                 18.75%   

</TABLE>

<PAGE>

                                                                    Page 1 of 4
<TABLE>
<CAPTION>

SOUTH FORK PROSPECT                                EXHIBIT A-14
WASHAKIE COUNTY, WYOMING         PURCHASE AND SALE AGREEMENT DATED____________, 1998
                                            EFFECTIVE JANUARY 1, 1998



TRACT                                        NO.        SERIAL NUMBER           ROYALTY OWNER       
 NO.          DESCRIPTION OF LAND           ACRES     & EXPIRATION DATE         & PERCENTAGE        
- ---------------------------------------------------------------------------------------------------
<S>  <C>                                   <C>        <C>                       <C>                 

          FEDERAL LANDS

N/A  TOWNSHIP 46 NORTH, RANGE 92 WEST                    WYW-135712                  U.S.A.         
     Section 3: N/2SW/4, SW/4SE/4           960.00       03/31/2005                    All          
     Section 9: SW/4SE/4                              Bass Lease 39558                              
     Section 10: S/2N/2, S/2                                                                        
     Section 15: W/2                                                                                
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    

N/A  TOWNSHIP 46 NORTH, RANGE 92 WEST                     W-132324                  U.S.A.          
     Section 26: SE/4NE/4                    40.00       05/31/2004                   All           
                                                      Bass Lease 40724                              
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    

N/A  TOWNSHIP 46 NORTH, RANGE 92 WEST                    WYW-130172                  U.S.A          
     Section 22: SE/4SE/4                   600.00       08/31/2003                   All           
     Section 26: W/2NE/4, W/2, SE/4                   Bass Lease 40727                              
                                                                                                    
                                                                                                    
                                                                                                    

<CAPTION>
TRACT    LESSEE OF RECORD            OVERRIDING ROYALTY         WORKING INTEREST
 NO.       & PERCENTAGE              & DECIMAL INTEREST          & PERCENTAGE
- ----------------------------------------------------------------------------------------------
<S>       <C>                       <C>                         <C>

     

N/A       Perry R. Bass, Inc.       None                         Perry R. Bass, Inc.
                          25.00%                                                 25.00%
          Sid R. Bass, Inc.                                      Sid R. Bass, Inc.
                          18.75%                                                 18.75%
          Lee M. Bass, Inc.                                      Lee M. Bass, Inc.
                          18.75%                                                 18.75%
          Keystone, Inc.                                         Keystone, Inc.        
                          18.75%                                                 18.75%
          Thru Line Inc.                                         Thru Line Inc.
                          18.75%                                                 18.75%
                  ******                                                 ******

N/A       Perry R. Bass, Inc.       Herbaly Petroleum Corp.      Perry R. Bass, Inc.
                          25.00%                    .030000                      25.00%
          Sid R. Bass, Inc.                                      Sid R. Bass, Inc.
                          18.75%                                                 18.75%
          Lee M. Bass, Inc.                                      Lee M. Bass, Inc.
                          18.75%                                                 18.75%
          Keystone, Inc.                                         Keystone, Inc.
                          18.75%                                                 18.75%
          Thru Line Inc.                                         Thru Line Inc.
                          18.75%                                                 18.75%
                  ******                                                 ******

N/A       Perry R. Bass, Inc.       Elmer L. Herbaly             Perry R. Bass, Inc.
                          25.00%                    .030000                      25.00%
          Sid R. Bass, Inc.                                      Sid R. Bass, Inc.
                          18.75%                                                 18.75%
          Lee M. Bass, Inc.                                      Lee M. Bass, Inc.
                          18.75%                                                 18.75%

</TABLE>

<PAGE>

                                                                    Page 2 of 4
<TABLE>
<CAPTION>

SOUTH FORK PROSPECT                                EXHIBIT A-14
WASHAKIE COUNTY, WYOMING       PURCHASE AND SALE AGREEMENT DATED____________, 1998
                                            EFFECTIVE JANUARY 1, 1998



TRACT                                        NO.        SERIAL NUMBER           ROYALTY OWNER       
 NO.          DESCRIPTION OF LAND           ACRES     & EXPIRATION DATE         & PERCENTAGE        
- ----------------------------------------------------------------------------------------------------
<S>  <C>                                   <C>        <C>                       <C>                 
          FEDERAL LANDS (CONT'D)
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    

N/A  TOWNSHIP 45 NORTH, RANGE 91 WEST                    WYW-140321                  U.S.A          
     Section 6: Lots 8-18; S/2NE/4,       1,635.01       11/30/2006                   All           
                SE/4NW/4, E/2SW/4, SE/4               Bass Lease 40788                              
     Section 7: Lots 5-12, E/2W/2, E/2                                                              
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    

N/A  TOWNSHIP 46 NORTH, RANGE 92 WEST                     WYW-115475                 U.S.A          
     Section 25: NW/4SW/4, S/2SW/4          120.00        03/31/99                     All          
                                                      Bass Lease 41149                              
     DRILLING COMMITMENT:                                                                           
     A well must be drilled on or before                                                            
     August 1, 1998, or reassign lease to                                                           
     Hayes Oil & Gas Co.                                                                            
                                                                                                    
                                                                                                    
                                                                                                    

N/A  TOWNSHIP 46 NORTH, RANGE 91 WEST                    WYW-142961                  U.S.A          
     Section 18: Lot 7                      128.20       09/30/2007                   All           
     Section 30: Lots 11 and 12                       Bass Lease 41317                              
                                                                                                    

<CAPTION>
TRACT      LESSEE OF RECORD             OVERRIDING ROYALTY         WORKING INTEREST
 NO.         & PERCENTAGE               & DECIMAL INTEREST          & PERCENTAGE
- ------------------------------------------------------------------------------------------------
<S>         <C>                        <C>                         <C>
     
            Keystone, Inc.                                         Keystone, Inc.
                            18.75%                                                 18.75%
            Thru Line Inc.                                         Thru Line Inc.
                            18.75%                                                 18.75%
                    ******                                                 ******

N/A         Perry R. Bass, Inc.              None                  Perry R. Bass, Inc.
                            25.00%                                                 25.00%
            Sid R. Bass, Inc.                                      Sid R. Bass, Inc.
                            18.75%                                                 18.75%
            Lee M. Bass, Inc.                                      Lee M. Bass, Inc.
                            18.75%                                                 18.75%
            Keystone, Inc.                                         Keystone, Inc.
                            18.75%                                                 18.75%
            Thru Line Inc.                                         Thru Line Inc.
                            18.75%                                                 18.75%
                    ******                                                 ******

N/A         Perry R. Bass, Inc.       Nilsen Energy                Perry R. Bass, Inc.
                            25.00%                     050000                      25.00%
            Sid R. Bass, Inc.         Hayes Oil & Gas Co.          Sid R. Bass, Inc.
                            18.75%                    .032500                      18.75%
            Lee M. Bass, Inc.         Rod Hayes et al              Lee M. Bass, Inc.
                            18.75%                    .012500                      18.75%
            Keystone, Inc.            Herbaly Petroleum Corp.      Keystone, Inc.
                            18.75%                    .005000                      18.75%
            Thru Line Inc.                                         Thru Line Inc.
                            18.75%                                                 18.75%
                    ******                                                 ******
N/A         Perry R. Bass, Inc.               None                 Perry R. Bass, Inc.
                            25.00%                                                 25.00%
            Sid R. Bass, Inc.                                      Sid R. Bass, Inc.
                            18.75%                                                 18.75%

</TABLE>

<PAGE>

                                                                    Page 3 of 4
<TABLE>
<CAPTION>

SOUTH FORK PROSPECT                               EXHIBIT A-14
WASHAKIE COUNTY, WYOMING       PURCHASE AND SALE AGREEMENT DATED____________, 1998
                                           EFFECTIVE JANUARY 1, 1998



TRACT                                        NO.        SERIAL NUMBER           ROYALTY OWNER       
 NO.          DESCRIPTION OF LAND           ACRES     & EXPIRATION DATE         & PERCENTAGE        
- ----------------------------------------------------------------------------------------------------
<S>  <C>                                   <C>        <C>                       <C>                 
          FEDERAL LANDS (CONT'D)
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    

N/A  TOWNSHIP 46 NORTH, RANGE 92 WEST                    WYW-142982                  U.S.A          
     Section 21: All                      1,920.02       09/30/2007                   All           
     Section 22: N/2, SW/4, N/2SE/4,                  Bass Lease 41318                              
                 SW/4SE/4                                                                           
     Section 23: SW/4NE/4, W/2NW/4,                                                                 
                 SE/4NW/4, S/2                                                                      
     Section 24: SW/4SW/4                                                                           
     Section 25: Lot 3, SW/4NE/4,                                                                   
                 NE/4NW/4                                                                           
     Section 26: NE/4NE/4                                                                           

            STATE LANDS

N/A  TOWNSHIP 46 NORTH, RANGE 92 WEST                St. of Wy-94-00059              ST WY          
     Section 36: All                        640.00        04/02/99                     All          
                                                      Bass Lease 40726                              
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    

<CAPTION>                                                                                                    
TRACT      LESSEE OF RECORD            OVERRIDING ROYALTY         WORKING INTEREST
 NO.         & PERCENTAGE              & DECIMAL INTEREST          & PERCENTAGE
- ------------------------------------------------------------------------------------------------
<S>         <C>                       <C>                         <C>
     
            Lee M. Bass, Inc.                                      Lee M. Bass, Inc.
                            18.75%                                                 18.75%
            Keystone, Inc.                                         Keystone, Inc.
                            18.75%                                                 18.75%
            Thru Line Inc.                                         Thru Line Inc.
                            18.75%                                                 18.75%
                    ******                                                 ******

N/A         Perry R. Bass, Inc.       AS TO SECTION 23 NW/4NW/4,   Perry R. Bass, Inc.
                            25.00%    S/2NW/4, SW/4NE/4, S/2                       25.00%
            Sid R. Bass, Inc.         SECTION 24: SW/SW/4          Sid R. Bass, Inc.
                            18.75%    SECTION 25: LOT 3, SW/4NE/4,                 18.75%
            Lee M. Bass, Inc.         NE/4NW/4                     Lee M. Bass, Inc.
                            18.75%    SECTION 26: NE/4NE/4                         18.75%
            Keystone, Inc.                                         Keystone, Inc.
                            18.75%    Herbaly Petroleum Corp.                      18.75%
            Thru Line Inc.                            .015000      Thru Line Inc.
                            18.75%                                                 18.75%

     

N/A         Perry R. Bass, Trustee    Herbaly Petroleum Corp.      Perry R. Bass, Trustee
                            25.00%                    .030000                      25.00%
            Sid R. Bass, Inc.                                      Sid R. Bass, Inc.
                            18.75%                                                 18.75%
            Lee M. Bass, Inc.                                      Lee M. Bass, Inc.
                            18.75%                                                 18.75%
            Keystone, Inc.                                         Keystone, Inc.
                            18.75%                                                 18.75%
            Thru Line Inc.                                         Thru Line Inc.
                            18.75%                                                 18.75%

</TABLE>

<PAGE>

                                                                    Page 4 of 4
<TABLE>
<CAPTION>

SOUTH FORK PROSPECT                                EXHIBIT A-14
WASHAKIE COUNTY, WYOMING        PURCHASE AND SALE AGREEMENT DATED____________, 1998
                                             EFFECTIVE JANUARY 1, 1998



TRACT                                        NO.        SERIAL NUMBER           ROYALTY OWNER       
 NO.          DESCRIPTION OF LAND           ACRES     & EXPIRATION DATE         & PERCENTAGE        
- ---------------------------------------------------------------------------------------------------
<S>  <C>                                   <C>        <C>                       <C>                 
     STATE LANDS (CONT'D)

N/A  TOWNSHIP 46 NORTH, RANGE 92 WEST                St. of Wy-97-00152              ST WY          
     Section 16: E/2SW/4, SE/4              240.00       04/02/2002                   All           
                                                      Bass Lease 40962                              
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
<CAPTION>
TRACT      LESSEE OF RECORD            OVERRIDING ROYALTY         WORKING INTEREST
 NO.         & PERCENTAGE              & DECIMAL INTEREST          & PERCENTAGE
- ------------------------------------------------------------------------------------------------
<S>         <C>                       <C>                         <C>
     

N/A         Perry R. Bass, Trustee          None                   Perry R. Bass, Trustee
                            25.00%                                                 25.00%
            Sid R. Bass, Inc.                                      Sid R. Bass, Inc.
                            18.75%                                                 18.75%
            Lee M. Bass, Inc.                                      Lee M. Bass, Inc.
                            18.75%                                                 18.75%
            Keystone, Inc.                                         Keystone, Inc.
                            18.75%                                                 18.75%
            Thru Line Inc.                                         Thru Line Inc.
                            18.75%                                                 18.75%

</TABLE>

<PAGE>

                                                                    Page 1 of 4
<TABLE>
<CAPTION>

TREASURE PROSPECT                                EXHIBIT A-15
WASHAKIE COUNTY, WYOMING       PURCHASE AND SALE AGREEMENT DATED____________, 1998
                                            EFFECTIVE JANUARY 1, 1998



TRACT                                        NO.        SERIAL NO.              ROYALTY OWNER       
 NO.          DESCRIPTION OF LAND           ACRES     & EXPIRATION DATE         & PERCENTAGE        
- ----------------------------------------------------------------------------------------------------
<S>  <C>                                   <C>        <C>                       <C>                 
          FEDERAL LANDS

N/A  TOWNSHIP 48 NORTH, RANGE 92 WEST                    WYW-121343                  U.S.A.         
     Section 25: NE/4, E/2NW/4              240.00            HBP                     All           
     (Other lands in lease fall in                    Bass Lease 34752                              
     Non-Unitized, Producing)                                                                       
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    

N/A  TOWNSHIP 48 NORTH, RANGE 92 WEST                       W-83731                  U.S.A.         
     Section 12: W/2, SE/4                  560.00            HBP                     All           
     Section 23: E/2SW/4                              Bass Lease 35173                              
     (Other lands in lease fall in                                                                  
     Non-Unitized, Producing)                                                                       
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    

N/A  TOWNSHIP 48 NORTH, RANGE 92 WEST                     W-132325                    U.S.A         
     Section 13: NE/4NE/4, W/2E/2, W/2      680.00       05/31/2004                    All          
     Section 14: SE/4                                 Bass Lease 39238                              
                                                                                                    
                                                                                                    
                                                                                                    

<CAPTION>
TRACT     LESSEE OF RECORD            OVERRIDING ROYALTY         WORKING INTEREST
 NO.        & PERCENTAGE              & DECIMAL INTEREST          & PERCENTAGE
- -----------------------------------------------------------------------------------------------
<S>        <C>                       <C>                         <C>
     

N/A        Perry R. Bass, Inc.               None                 Perry R. Bass, Inc.
                           25.00%                                                 25.00%
           Sid R. Bass, Inc.                                      Sid R. Bass, Inc.
                           18.75%                                                 18.75%
           Lee M. Bass, Inc.                                      Lee M. Bass, Inc.
                           18.75%                                                 18.75%
           Keystone, Inc.                                         Keystone, Inc.
                           18.75%                                                 18.75%
           Thru Line Inc.                                         Thru Line Inc.        
                           18.75%                                                 18.75%
                   ******                                                 ******

N/A        Perry R. Bass, Inc.       Mary B. Sprinkle             Perry R. Bass, Inc.
                           25.00%                    .062500                      25.00%
           Sid R. Bass, Inc.         Union Oil Company            Sid R. Bass, Inc.
                           18.75%                    .022500                      18.75%
           Lee M. Bass, Inc.                                      Lee M. Bass, Inc.
                           18.75%                                                 18.75%
           Keystone, Inc.                                         Keystone, Inc.
                           18.75%                                                 18.75%
           Thru Line Inc.                                         Thru Line Inc.
                           18.75%                                                 18.75%
                   ******                                                 ******

N/A        Perry R. Bass, Inc.               None                 Perry R. Bass, Inc.
                           25.00%                                                 25.00%
           Sid R. Bass, Inc.                                      Sid R. Bass, Inc.
                           18.75%                                                 18.75%
           Lee M. Bass, Inc.                                      Lee M. Bass, Inc.
                           18.75%                                                 18.75%

</TABLE>

<PAGE>

                                                                    Page 2 of 4
<TABLE>
<CAPTION>

TREASURE PROSPECT                                EXHIBIT A-15
WASHAKIE COUNTY, WYOMING       PURCHASE AND SALE AGREEMENT DATED____________, 1998
                                            EFFECTIVE JANUARY 1, 1998



TRACT                                        NO.        SERIAL NO.              ROYALTY OWNER       
 NO.          DESCRIPTION OF LAND           ACRES     & EXPIRATION DATE         & PERCENTAGE        
- ----------------------------------------------------------------------------------------------------
<S>  <C>                                   <C>        <C>                       <C>                 
          FEDERAL LANDS (CONT'D)
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    

N/A  TOWNSHIP 48 NORTH, RANGE 92 WEST                    WYW-134314                  U.S.A          
     Section 22: SE/4NE/4                    40.00       10/31/2004                   All           
                                                      Bass Lease 39457     
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
N/A  TOWNSHIP 48 NORTH, RANGE 92 WEST                    WYW-135713                  U.S.A          
     Section 13: SE/4NE/4, NE/4SE/4         320.00       03/31/2005                   All           
     Section 22: W/2NE/4, SE/4                        Bass Lease 39559                              
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    

<CAPTION>
TRACT   LESSEE OF RECORD            OVERRIDING ROYALTY         WORKING INTEREST
 NO.      & PERCENTAGE              & DECIMAL INTEREST          & PERCENTAGE
- ---------------------------------------------------------------------------------------------
<S>      <C>                       <C>                         <C>
     
         Keystone, Inc.                                         Keystone, Inc.
                         18.75%                                                 18.75%
         Thru Line Inc.                                         Thru Line Inc.
                         18.75%                                                 18.75%
                 ******                                                 ******

N/A      Perry R. Bass, Inc.              None                  Perry R. Bass, Inc.
                         25.00%                                                 25.00%
         Sid R. Bass, Inc.                                      Sid R. Bass, Inc.
                         18.75%                                                 18.75%
         Lee M. Bass, Inc.                                      Lee M. Bass, Inc.
                         18.75%                                                 18.75%
         Keystone, Inc.                                         Keystone, Inc.
                         18.75%                                                 18.75%
         Thru Line Inc.                                         Thru Line Inc.
                         18.75%                                                 18.75%
                 ******                                                 ******

N/A      Perry R. Bass, Inc.               None                 Perry R. Bass, Inc.
                         25.00%                                                 25.00%
         Sid R. Bass, Inc.                                      Sid R. Bass, Inc.
                         18.75%                                                 18.75%
         Lee M. Bass, Inc.                                      Lee M. Bass, Inc.
                         18.75%                                                 18.75%
         Keystone, Inc.                                         Keystone, Inc.
                         18.75%                                                 18.75%
         Thru Line Inc.                                         Thru Line Inc.
                         18.75%                                                 18.75%
</TABLE>

<PAGE>

                                                                    Page 3 of 4
<TABLE>
<CAPTION>

TREASURE PROSPECT                                     EXHIBIT A-15
WASHAKIE COUNTY, WYOMING            PURCHASE AND SALE AGREEMENT DATED____________, 1998
                                                 EFFECTIVE JANUARY 1, 1998



TRACT                                        NO.        SERIAL NO.              ROYALTY OWNER       
 NO.          DESCRIPTION OF LAND           ACRES     & EXPIRATION DATE         & PERCENTAGE        
- -----------------------------------------------------------------------------------------------------------
<S>  <C>                                   <C>        <C>                       <C>                 
          FEDERAL LANDS (CONT'D)

N/A  TOWNSHIP 48 NORTH, RANGE 92 WEST                    WYW-138488                  U.S.A          
     Section 25: SW/4                       480.00       02/28/2006                   All           
     Section 26: N/2NE/4, SE/4NE4,                    Bass Lease 40600                              
                 SW/4SE/4                                                                           
     Section 35: W/2E/2                                                                             
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    

N/A  TOWNSHIP 48 NORTH, RANGE 92 WEST                    WYW-140354                  U.S.A          
     Section 23: NE/4, N/2SE/4              240.00       11/30/2006                   All           
                                                      Bass Lease 40784     
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
             FEE LANDS

N/A  TOWNSHIP 48 NORTH, RANGE 92 WEST                      STT, Inc.                STT, Inc.       
     Section 4: Lots 1-4, S/2N/2, S/2       634.31        08/16/98                   15.00%         
                (Less and except 7.82                 Bass Lease 39438                              
                acre metes and bounds                                                               
                description)                                                                        
     Recorded in Microfilm Book 67, 
     Page 1552                                                       

<CAPTION>
TRACT     LESSEE OF RECORD            OVERRIDING ROYALTY         WORKING INTEREST
 NO.        & PERCENTAGE              & DECIMAL INTEREST          & PERCENTAGE
- ------------------------------------------------------------------------------------------
<S>        <C>                       <C>                         <C>
     

N/A        Perry R. Bass, Inc.              None                  Perry R. Bass, Inc.
                           25.00%                                                 25.00%
           Sid R. Bass, Inc.                                      Sid R. Bass, Inc.
                           18.75%                                                 18.75%
           Lee M. Bass, Inc.                                      Lee M. Bass, Inc.
                           18.75%                                                 18.75%
           Keystone, Inc.                                         Keystone, Inc.
                           18.75%                                                 18.75%
           Thru Line Inc.                                         Thru Line Inc.
                           18.75%                                                 18.75%
                   ******                                                 ******

N/A        Perry R. Bass, Inc.              None                  Perry R. Bass, Inc.
                           25.00%                                                 25.00%
           Sid R. Bass, Inc.                                      Sid R. Bass, Inc.
                           18.75%                                                 18.75%
           Lee M. Bass, Inc.                                      Lee M. Bass, Inc.
                           18.75%                                                 18.75%
           Keystone, Inc.                                         Keystone, Inc.
                           18.75%                                                 18.75%
           Thru Line Inc.                                         Thru Line Inc.
                           18.75%                                                 18.75%
     

N/A        Perry R. Bass, Trustee           None                  Perry R. Bass, Trustee
                           25.00%                                                 25.00%
           Sid R. Bass, Inc.                                      Sid R. Bass, Inc.
                           18.75%                                                 18.75%
           Lee M. Bass, Inc.                                      Lee M. Bass, Inc.
                           18.75%                                                 18.75%

</TABLE>

<PAGE>

                                                                    Page 4 of 4
<TABLE>
<CAPTION>

TREASURE PROSPECT                                     EXHIBIT A-15
WASHAKIE COUNTY, WYOMING            PURCHASE AND SALE AGREEMENT DATED____________, 1998
                                                 EFFECTIVE JANUARY 1, 1998



TRACT                                        NO.        SERIAL NO.              ROYALTY OWNER       
 NO.          DESCRIPTION OF LAND           ACRES     & EXPIRATION DATE         & PERCENTAGE        
- -------------------------------------------------------------------------------------------------
<S>  <C>                                   <C>        <C>                       <C>                 

          FEE LANDS (CONT'D)
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    

<CAPTION>
TRACT      LESSEE OF RECORD            OVERRIDING ROYALTY         WORKING INTEREST
 NO.         & PERCENTAGE              & DECIMAL INTEREST          & PERCENTAGE
- ------------------------------------------------------------------------------------------------
<S>         <C>                       <C>                         <C>

     
            Keystone, Inc.                                         Keystone, Inc.
                            18.75%                                                 18.75%
            Thru Line Inc.                                         Thru Line Inc.
                            18.75%                                                 18.75%

</TABLE>

<PAGE>

                                                                  Page 1 of 2

<TABLE>
<CAPTION>

EASEMENTS                                              EXHIBIT A-16
WASHAKIE COUNTY, WYOMING             PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                                EFFECTIVE JANUARY 1, 1998

TRACT                                           NO.      SERIAL NO. &                             
 NO.      DESCRIPTION OF LAND                  ACRES    EXPIRATION DATE            GRANTOR        
- ---------------------------------------------------------------------------------------------------
<S>                                          <C>      <C>                          <C>            
          TRAVERSES

N/A  TOWNSHIP 47 NORTH, RANGE 91 WEST                       W-94104                  U.S.A.       
     Section 7:  Lot 11                      37.88       02/04/2021
     Section 19: Lots 9 and 12, NE/4SW/4,             Bass Lease 36727
                 SE/4
     Section 20: SW/4NW/4, NW/4SW/4
     Section 28: SW/4, NW/4SE/4
     Section 29: S/2S/2
     Section 30: Lots 5-10, N/2NE/4,
                 E/2NW/4, NE/4SW/4, SE/4
     Section 33: NW/4NE/4, NE/4NW/4

     TOWNSHIP 47 NORTH, RANGE 92 WEST
     Section 1:  S/2NW/4, E/2SW/4, SW/4SE/4
     Section 2:  Lot 1, SE/4NE/4, E/2SW/4,
                 N/2SE/4, SW/4SE/4
     Section 11: W/2NE/4, SE/4NE/4, NE/4NW/4,
                 NE/4SE/4
     Section 12: W/2NE/4, SE/4NE/4, W/2SW/4,
                 SE/4SW/4, NE/4SE/4
     Section 13: SW/4NE/4, E/2NW/4, W/2SE/4
     Section 24: NW/4NE/4, SE/4SW/4, SW/4SE/4
     Section 25: N/2NE/4, SE/4NE/4

     Width:  25 Feet
     Length: 66,000 Feet
     For:    Natural Gas Pipeline

<CAPTION>
TRACT            LESSEE OF RECORD        OVERRIDING ROYALTY
 NO.             & PERCENTAGE            & DECIMAL INTEREST                           HOLDER
- -----------------------------------------------------------------------------------------------------------
<S>             <C>                      <C>                               <C>
     

N/A                    N/A                          N/A                    Bass Enterprises Production Co.
     
</TABLE>

<PAGE>

                                                                  Page 2 of 2

<TABLE>
<CAPTION>

EASEMENTS                                              EXHIBIT A-16
WASHAKIE COUNTY, WYOMING             PURCHASE AND SALE AGREEMENT DATED ___________, 1998
                                                EFFECTIVE JANUARY 1, 1998

TRACT                                           NO.      SERIAL NO. &                              
 NO.      DESCRIPTION OF LAND                  ACRES    EXPIRATION DATE            GRANTOR         
- -----------------------------------------------------------------------------------------------
<S>                                          <C>      <C>                          <C>             
          TRAVERSES

N/A  TOWNSHIP 47 NORTH, RANGE 91 WEST                       W-32516                 U.S.A.        
     Section 7: Lots 7 and 8, SE/4NW/4,        N/A      Indefinite Term
                S/2NE/4                               Bass Lease 39198
     Section 8: N/2N/2

     TOWNSHIP 47 NORTH, RANGE 92 WEST
     Section 10: S/2SE/4
     Section 11: S/2SW/4, W/2SE/4, NE/4SE/4
     Section 12: N/2SW/4, S/2NE/4
     Section 14: NW/4NW/4
     Section 15: N/2N/2

     Width:  25 Feet on Either Side of Natural Gas Pipeline
     Length: 5.1276 Miles
     For:    Natural Gas Pipeline

<CAPTION>
TRACT       LESSEE OF RECORD        OVERRIDING ROYALTY
 NO.        & PERCENTAGE            & DECIMAL INTEREST                           HOLDER
- ------------------------------------------------------------------------------------------------------
<S>        <C>                      <C>                               <C>
     

N/A                N/A                      N/A                       Bass Enterprises Production Co.
     
     
</TABLE>
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 001         49043053070000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 002         49043053230000      COTTONWOOD CREEK      BEPCO           PA
         COTTONWOOD CREEK UNIT 004         49043052760000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 005         49043052820000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 006         49043052730000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 007         49043053010000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 008         49043052860000      COTTONWOOD CREEK      BEPCO           PA
         COTTONWOOD CREEK UNIT 008X        49043207830000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 009         49043053030000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 010         49043052650000      COTTONWOOD CREEK      BEPCO           PA
         COTTONWOOD CREEK UNIT 010X        49043207190000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 011         49043052450000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 012         49043052690000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 014         49043052510000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 015         49043052460000      COTTONWOOD CREEK      BEPCO           PA
         COTTONWOOD CREEK UNIT 015X        49043207200000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 016         49043052710000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 017         49043052300000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 018         49043052870000      COTTONWOOD CREEK      BEPCO           PA
         COTTONWOOD CREEK UNIT 018X        49043207210000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 019         49043052520000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 020         49043052700000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 021         49043052530000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 022         49043052320000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 023         49043053040000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 024         49043052380000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 025         49043052400000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 026         49043052980000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 027         49043052390000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 028         49043052670000      COTTONWOOD CREEK      BEPCO           PA

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME              LOCATION            WI            NRI(1)        ORI(2)
- ------   -----------------------              --------            --            ------        ------
<S>      <C>                                  <C>                <C>           <C>           <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 001            SW SW 02 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 002            SW NE 03 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 004            SE SE 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 005            NW SW 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 006            NW NE 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 007            NW NW 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 008            NW SE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 008X           NW SE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 009            NW NE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 010            NW NW 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 010X           NW NW 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 011            NW SE 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 012            NW NE 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 014            NW SW 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 015            NW SW 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 015X           NW SW 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 016            NW NE 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 017            NW NW 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 018            NW SW 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 018X           NW SW 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 019            NW SE 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 020            NW NW 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 021            NW SE 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 022            NW NE 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 023            NW SW 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 024            NW NW 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 025            NW NE 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 026            NW NW 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 027            NW NE 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 028            NW NW 14 47N 91W   .91098801     .76677372     .00004650

</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 1
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 029         49043052490000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 030         49043052950000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 031         49043052500000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 032         49043052360000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 033         49043052480000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 034         49043052680000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 035         49043052840000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 036         49043052340000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 037         49043052970000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 038         49043052350000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 039         49043052830000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 040         49043051960000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 041         49043053160000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 042         49043052810000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 043         49043053710000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 044         49043052640000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 045         49043052960000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 046         49043052990000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 047         49043053300000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 048         49043052780000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 050         49043052660000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 051         49043052330000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 052         49043052630000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 053         49043053290000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 054         49043053520000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 055         49043053130000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 059         49043051970000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 060         49043051920000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 061         49043051940000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 062         49043051950000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 063         49043051870000      COTTONWOOD CREEK      BEPCO           PRD

<CAPTION>
  PP NO. PROPERTY NAME/WELL NAME            LOCATION           WI            NRI(1)        ORI(2)
  ------ -----------------------            --------           --            ------        ------
<S>      <C>                                <C>                <C>           <C>           <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 029          NW SW 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 030          NW NW 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 031          NW SE 15 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 032          NW NW 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 033          NW SW 15 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 034          NW NE 15 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 035          NW SW 10 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 036          NW NW 22 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 037          NW NE 09 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 038          NW NE 22 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 039          NW SE 09 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 040          NW SE 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 041          NW SE 04 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 042          NW SW 05 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 043          NW NE 32 48N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 044          NW NE 16 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 045          NW NW 09 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 046          NW NW 10 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 047          NW NW 04 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 048          NW SE 08 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 050          NW NW 15 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 051          NW NE 21 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 052          NW NW 16 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 053          NW NE 04 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 054          NW SE 32 48N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 055          NW SW 04 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 059          NW SE 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 060          NW SW 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 061          NW SW 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 062          NW SE 22 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 063          NW NE 26 47N 91W   .91098801     .76677372     .00004650
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 2
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 064         49043051880000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 066         49043052940000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 067         49043052880000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 068         49043052770000      COTTONWOOD CREEK      BEPCO         PA
         COTTONWOOD CREEK UNIT 069         49043052920000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 070         49043052720000      COTTONWOOD CREEK      BEPCO         PA
         COTTONWOOD CREEK UNIT 070X        49043207170000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 071         49043052620000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 072         49043052750000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 073         49043052570000      COTTONWOOD CREEK      BEPCO         SI
         COTTONWOOD CREEK UNIT 074         49043052580000      COTTONWOOD CREEK      BEPCO         PA
         COTTONWOOD CREEK UNIT 074X        49043208070000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 075         49043052410000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 077         49043052470000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 078         49043052850000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 081         49043051860000      COTTONWOOD CREEK      BEPCO         PA
         COTTONWOOD CREEK UNIT 081A        49043206300000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 082         49043052740000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 083         49043052910000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 084         49043053020000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 086         49043052930000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 087         49043052790000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 088         49043055890000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 089         49043200180000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 090         49043200170000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 091         49043200220000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 092         49043056060000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 094         49043200090000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 095         49043200350000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 096         49043200310000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 097         49043200360000      COTTONWOOD CREEK      BEPCO         PRD

<CAPTION>
  PP NO. PROPERTY NAME/WELL NAME             LOCATION            WI            NRI(1)        ORI(2)
  ------ -----------------------             --------            --            ------        ------
<S>      <C>                                 <C>                <C>           <C>           <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 064           NW NW 25 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 066           SW NW 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 067           NW SW 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 068           SE SE 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 069           NW SW 09 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 070           NW NW 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 070X          NW NW 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 071           NW NE 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 072           NW NW 16 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 073           NW SW 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 074           NW SE 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 074X          SW SE 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 075           NW NW 20 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 077           NW SE 16 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 078           NW SE 10 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 081           NW NE 27 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 081A          NW NE 27 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 082           NW NE 16 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 083           NW SE 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 084           NW NE 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 086           NW SE 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 087           NE SW 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 088           SE SE 09 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 089           SE NW 15 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 090           SE NE 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 091           SE SE 15 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 092           SE SE 01 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 094           SE SW 01 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 095           SE SW 06 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 096           NW SW 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 097           SE SE 02 47N 91W   .91098801     .76677372     .00004650
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 3
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 098         49043200550000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 101         49043201130000      COTTONWOOD CREEK      BEPCO         PA
         COTTONWOOD CREEK UNIT 102         49043201880000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 103         49043201900000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 104         49043201520000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 105         49043201850000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 106         49043201830000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 107         49043203870000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 108         49043201970000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 111         49043202110000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 113         49043202150000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 114         49043202140000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 115         49043202170000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 116         49043202160000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 118         49043202180000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 120         49043203110000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 121         49043204450000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 122         49043204450000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 123         49043204310000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 124         49043204380000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 125         49043204300000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 126         49043204320000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 127         49043204370000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 128         49043204430000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 129         49043204590000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 130         49043204500000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 131         49043204510000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 132         49043204580000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 133         49043204570000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 134         49043204560000      COTTONWOOD CREEK      BEPCO         PA
         COTTONWOOD CREEK UNIT 134X        49043207300000      COTTONWOOD CREEK      BEPCO         PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION            WI            NRI(1)        ORI(2)
- ------   -----------------------             --------            --            ------        ------
<S>      <C>                                 <C>                <C>           <C>           <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 098           NW SE 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 101           NW NW 26 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 102           NW NE 17 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 103           SE SE 22 47N 91W   .91098601     .76677372     .00004650
         COTTONWOOD CREEK UNIT 104           SE SE 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 105           SE NE 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 106           SE SW 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 107           SE SW 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 108           SE NE 16 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 111           NE SE 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 113           SE NE 17 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 114           SE NE 27 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 115           SE NW 16 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 116           SW NW 22 47N 92W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 118           SE NW 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 120           SE NW 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 121           NW SW 05 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 122           SW SW 17 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 123           SE SE 16 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 124           SE NW 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 125           SE NW 26 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 126           SE SW 22 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 127           SE NW 22 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 128           SE SW 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 129           SE SW 09 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 130           SE NW 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 131           SE NE 26 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 132           SE SW 15 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 133           SE NE 22 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 134           SE NW 27 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 134X          SE NW 27 47N 91W   .91098801     .76677372     .00004650
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 4
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 135         49043204650000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 136         49043204630000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 139         49043204930000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 141         49043264850000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 145         49043205040000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 151         49043205680000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 156         49043205640000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 157         49043205790000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 158         49043205650000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 159         49043205660000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 160         49043205800000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 161         49043205810000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 162         49043205630000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 163         49043205670000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 165         49043205630000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 166         49043205840000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 167         49043206110000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 168         49043206050000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 169         49043206040000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 171         49043206060000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 172         49043206090000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 173         49043206130000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 174         49043206150000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 175         49043206120000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 179         49043206200000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 180         49043206210000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 182         49043206190000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 183         49043206350000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 184         49043206370000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 165         49043206380000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 186         49043206420000      COTTONWOOD CREEK      BEPCO         TA

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION            WI            NRI(1)        ORI(2)
- ------   -----------------------             --------            --            ------        ------
<S>      <C>                                 <C>                <C>           <C>           <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 135           NW SE 31 48N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 136           SW SE 07 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 139           SE NW 21 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 141           SE SW 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 145           SE SE 08 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 151           SE SE 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 156           NW NE 10 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 157           SE NW 10 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 158           SE SE 10 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 159           SE SW 10 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 160           SE NE 09 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 161           SE NW 09 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 162           SE NE 15 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 163           SE NW 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 165           SE NW 17 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 166           SE SW 08 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 167           SW SE 04 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 168           SE NE 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 169           SW SW 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 171           NE NW 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 172           NE NE 27 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 173           SE NE 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 174           SE SE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 175           SE NE 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 179           SE SW 09 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 180           SE SW 04 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 182           SE NW 04 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 183           NW NW 17 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 184           SW NW 25 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 185           NW NE 05 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 186           NW SW 17 47N 91W   .91098801     .76677372     .00004650
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 5
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>

1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 199         49043206480000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 200         49043206470000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 201         49043206460000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 208         49043206490000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 210         49043207290000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 211         49043207270000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 212         49043207280000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 213         49043207260000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 214         49043207390000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 215         49043207410000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 216         49043207420000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 217         49043207350000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 218         49043207360000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 219         49043207400000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 220         49043207370000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 221         49043207430000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 222         49043207450000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 223         49043207460000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 224         49043207470000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 225         49043207490000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 226         49043207500000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 227         49043207480000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 228         49043207630000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 229         49043207650000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 230         49043207660000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 231         49043207670000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 232         49043207680000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 233         49043207690000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 234         49043207740000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 235         49043207730000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 236         49043207700000      COTTONWOOD CREEK      BEPCO         PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION             WI            NRI(1)        ORI(2)
- ------   -----------------------             --------             --            ------        ------
<S>      <C>                                 <C>                 <C>           <C>           <C>

1277601  COTTONWOOD CREEK UNIT - PHOSPH

         COTTONWOOD CREEK UNIT 199           SE  NE 18 47N 90W   .91098801     .76577372     .00004650
         COTTONWOOD CREEK UNIT 200           SE  NE 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 201           SE  NW 13 47N 92W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 208           SE  NW 16 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 210           SE  NW 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 211           SW  SW 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 212           SE  SW 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 213           SE  SE 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 214           SE  SW 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 215           SE  NW 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 216           NE  NE 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 217           SE  NE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 218           SE  NW 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 219           SW  SW 09 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 220           SE  SE 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 221           SE  SW 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 222           NW  NE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 223           NE  SE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 224           SW  SE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 225           SW  SW 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 226           SE  NE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 227           SW  NE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 228           SW  NW 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 229           NE  NW 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 230           SE  NE 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 231           NW  SE 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 232           SE  SE 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 233           SE  SW 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 234           LOT 05 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 235           NW  NE 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 236           NE  NE 13 47N 91W   .91098801     .76677372     .00004650

</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                   Page: 6
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
  PP NO. PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
  ------ -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 237         49043207620000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 238         49043207520000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 239         49043207530000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 240         49043207710000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 241         49043207720000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 242         49043207750000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 243         49043207840300      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 244         49043207850000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 245         49043207980000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 246         49043207950000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 247         49043207960000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 248         49043207970000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 249         49043208010000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 250         49043207990000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 251         49043208050000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 252         49043207770000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 253         49043207780000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 254         49043207790000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 255         49043207800000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 256         49043207810000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 257         49043207820000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 258         49043208000000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 259         49043208020000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 260         49043208030000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 261         49043207860000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 263         49043207880000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 267         49043208190000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 269         49043208210000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 271         49043208110000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 272         49043208150000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 273         49043208120000      COTTONWOOD CREEK      BEPCO        PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION            WI            NRI(1)        ORI(2)
- ------   -----------------------             --------            --            ------        ------
<S>      <C>                                 <C>                <C>           <C>           <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 237           NE NE 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 238           NW SW 33 48N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 239           SW NE 08 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 240           SW SE 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 241           SE NW 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 242           SE NW 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 243           SE SE 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 244           SW SE 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 245           NE SE 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 246           SW NE 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 247           SE NW 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 248           NE NE 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 249           NE NW 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 250           NE NE 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 251           SE NE 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 252           SW SW 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 253           NW NE 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 254           NE NE 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 255           SE NE 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 256           SW NW 20 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 257           SE NW 20 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 258           SW SE 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 259           SW SE 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 260           NW SE 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 261           NW SW 09 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 263           SW SE 32 48N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 267           NW NE 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 269           SW NW 26 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 271           NE NW 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 272           SE SE 02 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 273           NE NW 12 47N 91W   .91098801     .76677372     .00004650
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 7

<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                STATUS
  PP NO. PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR  01/01/98
  ------ -----------------------           ---                 -----                 --------  --------
<S>      <C>                               <C>                 <C>                   <C>       <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 274         49043208130000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 275         49043208140000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 276         49043208170000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 277         49043208080000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 278         49043208090000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 279         04043208060000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 280         49043208100000      COTTONWOOD CREEK      BEPCO        PRD

1277602  COTTONWOOD CREEK UNIT - TENSLP
         TENSLEEP UNIT 065                 49043053000000      COTTONWOOD CREEK      BEPCO        PRD
         TENSLEEP UNIT 110                 49043202070000      COTTONWOOD CREEK      BEPCO        PRD
         TENSLEEP UNIT 117                 49043202190000      COTTONWOOD CREEK      BEPCO        PRD
         TENSLEEP UNIT 119                 49043202310000      COTTONWOOD CREEK      BEPCO        PRD

1277604  COTTONWOOD CREEK UNIT WELL#189
         COTTONWOOD CREEK NPA 189          49043206400000      COTTONWOOD CREEK      BEPCO        PRD

1277605  COTTONWOOD CREEK UNIT WELL#190
         COTTONWOOD CREEK NPA 190          49043206410000      COTTONWOOD CREEK      BEPCO        PRD

1277606  COTTONWOOD CREEK UNIT WELL #56
         COTTONWOOD CREEK NPA 056          49043053510000      COTTONWOOD CREEK      BEPCO        TA

1277608  COTTONWOOD CREEK UNIT WELL #76
         COTTONWOOD CREEK NPA 076          49043052800000      COTTONWOOD CREEK      BEPCO        TA

1277610  COTTONWOOD CREEK UNIT WELL #85
         COTTONWOOD CREEK NPA 085          49043051850000      COTTONWOOD CREEK      BEPCO        TA

1277611  COTTONWOOD CREEK UNIT WELL#197
         COTTONWOOD CREEK NPA 197          49043206440000      COTTONWOOD CREEK      BEPCO        TA

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION             WI            NRI(1)        ORI(2)
- ------   -----------------------             --------             --            ------        ------
<S>      <C>                                 <C>                <C>           <C>           <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 274           SE NE 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 275           NE SW 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 276           NE NW 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 277           NW SE 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 278           NW SE 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 279           NE NW 16 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 280           NW NE 16 47N 90W   .91098801     .76677372     .00004650

1277602  COTTONWOOD CREEK UNIT - TENSLP
         TENSLEEP UNIT 065                   NW NE 07 47N 90W   1.00000000    .83746144     .00000000
         TENSLEEP UNIT 110                   SW NE 07 47N 90W   1.00000000    .83746144     .00000000
         TENSLEEP UNIT 117                   NW SE 07 47N 90W   1.00000000    .83746144     .00000000
         TENSLEEP UNIT 119                   NE NW 07 47N 90W   1.00000000    .83746144     .00000000

1277604  COTTONWOOD CREEK UNIT WELL#189
         COTTONWOOD CREEK NPA 189            NW SE 07 47N 91W   1.00000000    .82500000     .00000000

1277605  COTTONWOOD CREEK UNIT WELL#190
         COTTONWOOD CREEK NPA 190            NW NW 08 47N 91W   1.00000000    .82500000     .00000000

1277606  COTTONWOOD CREEK UNIT WELL #56
         COTTONWOOD CREEK NPA 056            NW SW 32 48N 91W    .91956760    .80462150     .00000000

1277608  COTTONWOOD CREEK UNIT WELL #76
         COTTONWOOD CREEK NPA 076            NW SW 08 47N 91W    .92203300    .67747480     .00000000

1277610  COTTONWOOD CREEK UNIT WELL #85
         COTTONWOOD CREEK NPA 085            NW NW 27 47N 91W    .91328560    .73088980     .00000000

1277611  COTTONWOOD CREEK UNIT WELL#197
         COTTONWOOD CREEK NPA 197            NW SE 09 47N 90W   1.00000000    .81500000     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.

                                                                        Page: 8
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                  OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                  --------   --------
<S>      <C>                               <C>                 <C>                    <C>        <C>
1277613  COTTONWOOD CREEK UNIT - FRONTIER
         COTTONWOOD CREEK UNIT 209         49043202580000      COTTONWOOD CREEK UNIT    BEPCO       TA

1277614  COTTONWOOD CREEK NPA - #109
         COTTONWOOD CREEK NPA 109          49043202050000      COTTONWOOD CREEK UNIT    BEPCO       TA

1277617  COTTONWOOD CREEK UNIT #262
         COTTONWOOD CREEK NPA 262          49043207870000      COTTONWOOD CREEK         BEPCO       PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION            WI            NRI(1)        ORI(2)
- ------   -----------------------             --------            --            ------        ------
<S>      <C>                                 <C>                <C>           <C>           <C>
1277613  COTTONWOOD CREEK UNIT - FRONTIER
         COTTONWOOD CREEK UNIT 209           NE NW 8  47N 90W  .00000000     .00000000     .00000000

1277614  COTTONWOOD CREEK NPA - #109
         COTTONWOOD CREEK NPA 109            NW SE 17 47N 91W  .91098801     .76677372     .00004650

1277617  COTTONWOOD CREEK UNIT #262
         COTTONWOOD CREEK NPA 262            SE SW 05 47N 91W  .91000750     .75075619     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 9

<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK FIELD EXTENSION (PHOSPHORIA) UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1196001  COTTONWOOD CREEK EXT UNIT
         CC EXTENSION UNIT 1-1             49043201540000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 11-1            49043201700000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 14-1            49043201760000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 16-1            49043201410000      COTTONWOOD CREEK      BEPCO         PA
         CC EXTENSION UNIT 16-1X           49043207230000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 18-1            49043056030000      COTTONWOOD CREEK      BEPCO         PA
         CC EXTENSION UNIT 19-1            49043201490000      COTTONWOOD CREEK      BEPCO         PA
         CC EXTENSION UNIT 19-1X           49043206170000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 20-1            49043201500000      COTTONWOOD CREEK      BEPCO         PA
         CC EXTENSION UNIT 20-1X           49043207240000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 21-1            49043201740000      COTTONWOOD CREEK      BEPCO         PA
         CC EXTENSION UNIT 22-1            49043201840000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 23-1            49043201860000      COTTONWOOD CREEK      BEPCO         PA
         CC EXTENSION UNIT 24-1            49043200080000      COTTONWOOD CREEK      BEPCO         PA
         CC EXTENSION UNIT 26-1            49043206280000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 27-1            49043206270000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 28-1            49043206260000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 29-1            49043207920000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 3-1             49043051750000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 30-1            49043208160000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 31-1            49043208220000      COTTONWOOD CREEK      BEPCO         PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION                 WI            NRI(1)        ORI(2)
- ------   -----------------------             --------                 --            ------        ------
<S>      <C>                                 <C>                      <C>           <C>           <C>
 1196001 COTTONWOOD CREEK EXT UNIT
         CC EXTENSION UNIT 1-1               LOT  5    01  46N  91W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 11-1              NW   SE   31  47N  90W   .96870790     .81103222     .00061500
         CC EXTENSION UNIT 14-1              LOT  14   06  46N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 16-1              NW   SW   31  47N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 16-1X             LOT  7    31  47N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 18-1              NE   SW   25  47N  91W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 19-1              LOT  12   06  46N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 19-1X             LOT  13   06  46N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 20-1              LOT  20   06  46N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 20-1X             LOT  18   06  46N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 21-1              SW   SW   32  47N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 22-1              SW   NW   32  47N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 23-1              SW   NE   31  47N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 24-1              NW   NE   36  47N  91W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 26-1              SE   SW   25  47N  91W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 27-1              LOT  12   06  46N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 28-1              SE   SW   31  47N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 29-1              NW   SW   25  47N  91W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 3-1               SW   SW   29  47N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 30-1              SE   SE   26  47N  91W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 31-1              LOT  08   31  47N  90W   .96870790     .81103222     .00061900

</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 1
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

NO WATER CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1252302  NO WATER CREEK UNIT
         NO WATER CREEK UNIT 11            49043200970000      NO WATER CREEK        BEPCO         TA
         NO WATER CREEK UNIT 12            49043201100000      NO WATER CREEK        BEPCO         TA
         NO WATER CREEK UNIT 14            49043201330000      NO WATER CREEK        BEPCO         TA
         NO WATER CREEK UNIT 17            49043207640000      NO WATER CREEK        BEPCO         PRD
         NO WATER CREEK UNIT 18            49043207930000      NO WATER CREEK        BEPCO         PRD
         NO WATER CREEK UNIT 19            49043208260000      NO WATER CREEK        BEPCO         PRD
         NO WATER CREEK UNIT 2             49043200280000      NO WATER CREEK        BEPCO         PA
         NO WATER CREEK UNIT 20            49043208250000      NO WATER CREEK        BEPCO         PRD
         NO WATER CREEK UNIT 3             49043200450000      NO WATER CREEK        BEPCO         PA
         NO WATER CREEK UNIT 5             49043200530000      NO WATER CREEK        BEPCO         PRD
         NO WATER CREEK UNIT 6             49043200640000      NO WATER CREEK        BEPCO         TA
         NO WATER CREEK UNIT 7             49043200690000      NO WATER CREEK        BEPCO         TA
         NO WATER CREEK UNIT 9             49043200810000      NO WATER CREEK        BEPCO         PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION              WI            NRI(1)        ORI(2)
- ------   -----------------------             --------              --            ------        ------
<S>      <C>                                 <C>                  <C>           <C>           <C>
1252302  NO WATER CREEK UNIT
         NO WATER CREEK UNIT 11              SW   NW 05 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 12              NW   SE 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 14              NE   SW 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 17              LOT  16 05 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 18              LOT  13 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 19              LOT  11 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 2               LOT  13 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 20              SE   NW 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 3               LOT  22 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 5               LOT  16 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 6               LOT  19 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 7               SW   SE 31 47N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 9               LOT  09 05 46N 91W   .94441730     .78727357     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 1
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

SLICK CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------  -----------------------            ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1252208  SLICK CREEK UNIT (PHOSPHORIA)
         SLICK CREEK H20 INJ #2            49043050020000      SLICK CREEK           BEPCO         DAI
         SLICK CREEK PHOSPHORIA 02         49043050020000      SLICK CREEK           BEPCO         TA
         SLICK CREEK PHOSPHORIA 03         49043051620000      SLICK CREEK           BEPCO         PA
         SLICK CREEK PHOSPHORIA 05         49043051700000      SLICK CREEK           BEPCO         PA
         SLICK CREEK PHOSPHORIA 06         49043051680000      SLICK CREEK           BEPCO         PA
         SLICK CREEK PHOSPHORIA 07         49043051660000      SLICK CREEK           BEPCO         PA
         SLICK CREEK PHOSPHORIA 1          49043051670000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK PHOSPHORIA 10         49043201520000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK PHOSPHORIA 11         49043201530000      SLICK CREEK           BEPCO         PA
         SLICK CREEK PHOSPHORIA 12         49043201580000      SLICK CREEK           BEPCO         PA
         SLICK CREEK PHOSPHORIA 21         49043210990000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK PHOSPHORIA 22         49043202250000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK PHOSPHORIA 30         49043205330000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK PHOSPHORIA 34-43      49043206530000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK PHOSPHORIA 35-31      49043206360000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK PHOSPHORIA 4          49043051610000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK PHOSPHORIA 8          49043051640000      SLICK CREEK           BEPCO         TA

1252209  SLICK CREEK UNIT (FRONTIER)
         SLICK CREEK FRONTIER 13           49043201630000      SLICK CREEK           BEPCO         PA
         SLICK CREEK FRONTIER 15           49043201640000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK FRONTIER 19           49043201690000      SLICK CREEK           BEPCO         PA
         SLICK CREEK FRONTIER 20           49043201670000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK FRONTIER 8            49043051640000      SLICK CREEK           BEPCO         PA

1252210  SLICK CREEK UNIT (MUDDY)
         SLICK CREEK MUDDY 06              49043051680000      SLICK CREEK           BEPCO         PA
         SLICK CREEK MUDDY 07              49043051660000      SLICK CREEK           BEPCO         PA
         SLICK CREEK MUDDY 11              49043201530000      SLICK CREEK           BEPCO         PA
         SLICK CREEK MUDDY 16              49043201650000      SLICK CREEK           BEPCO         PA

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION             WI            NRI(1)        ORI(2)
- ------   -----------------------             --------             --            ------        ------
<S>      <C>                                 <C>                 <C>           <C>           <C>
1252208  SLICK CREEK UNIT (PHOSPHORIA)
         SLICK CREEK H20 INJ #2              SE  NW 34 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 02           SE  NW 34 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 03           LOT 8  02 46N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 05           SE  NW 35 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 06           SE  NW 33 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 07           NE  SE 33 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 1            SE  NE 32 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 10           SE  SW 35 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 11           SE  SE 32 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 12           NE  SW 32 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 21           NW  NE 02 46N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 22           NE  NE 34 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 30           NE  SW 33 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 34-43        SE  NE 34 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 35-31        NW  SE 35 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 4            LOT 8  03 46N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 8            SW  SE 34 47N 92W   1.00000000    .86266071     .00054626

1252209  SLICK CREEK UNIT (FRONTIER)
         SLICK CREEK FRONTIER 13             NW  SE 34 47N 92W   1.00000000    .86500050     .00103100
         SLICK CREEK FRONTIER 15             LOT 8  02 46N 92W   1.00000000    .86500050     .00103100
         SLICK CREEK FRONTIER 19             NW  SE 33 47N 92W   1.00000000    .86500050     .00103100
         SLICK CREEK FRONTIER 20             NW  SW 35 47N 92W   1.00000000    .86500050     .00103100
         SLICK CREEK FRONTIER 8              SW  SE 34 47N 92W   1.00000000    .86500050     .00103100

1252210  SLICK CREEK UNIT (MUDDY)
         SLICK CREEK MUDDY 06                SE  NW 33 47N 92W   .00000000     .00000000     .00000000
         SLICK CREEK MUDDY 07                NE  SE 33 47N 92W   .00000000     .00000000     .00000000
         SLICK CREEK MUDDY 11                SE  SE 32 47N 92W   .00000000     .00000000     .00000000
         SLICK CREEK MUDDY 16                NE  SW 32 47N 92W   .00000000     .00000000     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 1
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

SLICK CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>

1252210  SLICK CREEK UNIT (MUDDY)
         SLICK CREEK MUDDY 17              49043201660000      SLICK CREEK             BEPCO       PA

SLICK CREEK UNIT

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION                 WI            NRI(1)        ORI(2)
- ------   -----------------------             --------                 --            ------        ------
<S>      <C>                                 <C>                     <C>           <C>           <C>
1252210  SLICK CREEK UNIT (MUDDY)
         SLICK CREEK MUDDY 17                LOT 8 03 46N 92W        .00000000     .00000000     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 2
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

SOUTH FRISBY UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1252214  SOUTH FRISBY UNIT
         SOUTH FRISBY 2                    49043202040000      SOUTH FRISBY          BEPCO      PRD
         SOUTH FRISBY 24-33                49043206390000      SOUTH FRISBY          BEPCO      PRD
         SOUTH FRISBY 3                    49043202350000      SOUTH FRISBY          BEPCO      TA
         SOUTH FRISBY 4                    49043202600000      SOUTH FRISBY          BEPCO      PA
         SOUTH FRISBY 6                    49043202950000      SOUTH FRISBY          BEPCO      PRD
         SOUTH FRISBY 7                    49043203940000      SOUTH FRISBY          BEPCO      PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME            LOCATION                 WI            NRI(1)        ORI(2)
- ------   -----------------------            --------                 --            ------        ------
<S>      <C>                                <C>                      <C>           <C>           <C>
1252214  SOUTH FRISBY UNIT
         SOUTH FRISBY 2                     NW SE 24 47N 92W         1.00000000    .86004334     .00000000
         SOUTH FRISBY 24-33                 SE SE 24 47N 92W         1.00000000    .86004334     .00000000
         SOUTH FRISBY 3                     SE NW 24 47N 92W         1.00000000    .86004334     .00000000
         SOUTH FRISBY 4                     NE NE 25 47N 92W         1.00000000    .86004334     .00000000
         SOUTH FRISBY 6                     LOT 9 30 47N 91W         1.00000000    .86004334     .00000000
         SOUTH FRISBY 7                     SE NW 30 47N 91W         1.00000000    .86004334     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 1
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

NON-UNITIZED ASSETS (COOP)

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1161201  COTTONWOOD CREEK FEDERAL
         COTTONWOOD CREEK 35-1             49043203730000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK 35-44            49043205970000      COTTONWOOD CREEK      BEPCO        PRD

1161202  COTTONWOOD CREEK STATE
         COTTONWOOD CREEK 36-1             49043204090000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK 36-24            49043205690000      COTTONWOOD CREEK      BEPCO        PRD

1161203  COTTONWOOD CREEK FEDERAL #35-2
         COTTONWOOD CREEK 35-2             49043204050000      COTTONWOOD CREEK      BEPCO        PRD

1161204  COTTONWOOD CREEK FEDERAL #35-3
         COTTONWOOD CREEK 35-3             49043204020000      COTTONWOOD CREEK      BEPCO        PRD

1161205  COTTONWOOD CREEK FEDERAL #2-1
         COTTONWOOD CREEK 2-1              49043204260000      COTTONWOOD CREEK      BEPCO        PRD

1161207  COTTONWOOD CREEK FEDERAL #2-34
         COTTONWOOD CREEK 2-34             49043204730000      COTTONWOOD CREEK      BEPCO        PRD

1161212  COTTONWOOD CREEK FEDERAL #26-23
         COTTONWOOD CREEK 26-23            49043206250000      COTTONWOOD CREEK      BEPCO        PRD

1161213  COTTONWOOD CREEK FEDERAL #21-23
         COTTONWOOD CREEK 21-23            49043206500000      COTTONWOOD CREEK      BEPCO        PRD

1161214  COTTONWOOD CREEK FEDERAL #28-41
         COTTONWOOD CREEK 28-41            49043206450000      COTTONWOOD CREEK      BEPCO        TA

1161215  COTTONWOOD CREEK FEDERAL #26-21
         COTTONWOOD CREEK 26-21            49043206510000      COTTONWOOD CREEK      BEPCO        PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION            WI            NRI(1)        ORI(2)
- ------   -----------------------             --------            --            ------        ------
<S>      <C>                                 <C>                <C>           <C>           <C>
1161201  COTTONWOOD CREEK FEDERAL
         COTTONWOOD CREEK 35-1               NW NE 35 47N 91W   1.00000000    .81250000     .00000000
         COTTONWOOD CREEK 35-44              NE NE 35 47N 91W   1.00000000    .81250000     .00000000

1161202  COTTONWOOD CREEK STATE
         COTTONWOOD CREEK 36-1               SW NW 36 47N 91W   1.00000000    .81250000     .00000000
         COTTONWOOD CREEK 36-24              NE SW 36 47N 91W   1.00000000    .81250000     .00000000

1161203  COTTONWOOD CREEK FEDERAL #35-2
         COTTONWOOD CREEK 35-2               NW NW 35 47N 91W   1.00000000    .81562500     .00000000

1161204  COTTONWOOD CREEK FEDERAL #35-3
         COTTONWOOD CREEK 35-3               NW SE 35 47N 91W   1.00000000    .81250000     .00000000

1161205  COTTONWOOD CREEK FEDERAL #2-1
         COTTONWOOD CREEK 2-1                LOT 11 2 46N 91W   1.00000000    .81250000     .00000000

1161207  COTTONWOOD CREEK FEDERAL #2-34
         COTTONWOOD CREEK 2-34               NE SE 2  46N 91W   1.00000000    .82500000     .00000000

1161212  COTTONWOOD CREEK FEDERAL #26-23
         COTTONWOOD CREEK 26-23              SE SW 26 47N 91W   1.00000000    .70312500     .00187500

1161213  COTTONWOOD CREEK FEDERAL #21-23
         COTTONWOOD CREEK 21-23              SE SW 21 47N 91W   1.00000000    .80937500     .06562500

1161214  COTTONWOOD CREEK FEDERAL #28-41
         COTTONWOOD CREEK 28-41              NW NE 28 47N 91W   1.00000000    .73125000     .01875000

1161215  COTTONWOOD CREEK FEDERAL #26-21
         COTTONWOOD CREEK 26-21              NW SW 26 47N 91W   1.00000000    .71290000     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 1
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

NON-UNITIZED ASSETS (CO-OP)

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1161217  KNISLEY FEDERAL #1
         KNISELY FEDERAL #1                49043051760000      COTTONWOOD CREEK      BEPCO        PRD

1252201  EARL SCHRANTZ USA
         SCHRANTZ USA 1                    49043051730000      COTTONWOOD CREEK      BEPCO        PRD
         SCHRANTZ USA 3                    49043200500000      COTTONWOOD CREEK      BEPCO        PRD
         SCHRANTZ USA 4                    49043200510000      COTTONWOOD CREEK      BEPCO        PA
         SCHRANTZ USA 5                    49043208240000      COTTONWOOD CREEK      BEPCO        PRD

1252202  TOLMAN USA
         TOLMAN USA 2                      49043200330000      COTTONWOOD CREEK      BEPCO        PRD
         TOLMAN USA 3                      49043200590000      COTTONWOOD CREEK      BEPCO        PRD

1252203  CALDWELL USA #1-7
         CALDWELL USA 1-7                  49043203830000      COTTONWOOD CREEK      BEPCO        PRD

1252204  FAURE USA
         USA FAURE 1                       49043200430000      RATTLESNAKE           BEPCO        PRD
         USA FAURE 2                       49043200570000      RATTLESNAKE           BEPCO        PA
         USA FAURE 4                       49043201020000      RATTLESNAKE           BEPCO        PRD

1252205  FAURE "A" USA
         USA FAURE A2-2                    49043203840000      RATTLESNAKE           BEPCO        PRD

1252206  LACOY FEDERAL
         LACOY FEDERAL 13-1                49043200770000      RATTLESNAKE           BEPCO        PRD

1252207  BEARD FEDERAL
         BEARD FEDERAL 1                   49043201090000      RATTLESNAKE           BEPCO        PA

1252211  ROME FEDERAL
         ROME FEDERAL 1                    49043201720000      SLICK CREEK           BEPCO        PRD

<CAPTION>
PP NO.  PROPERTY NAME/WELL NAME            LOCATION             WI            NRI(1)        ORI(2)
- ------   -----------------------            --------            --            ------        ------
<S>      <C>                                <C>                <C>           <C>           <C>
1161217  KNISLEY FEDERAL #1
         KNISELY FEDERAL #1                 NW SE 27 47N 91W   1.00000000    .71500000     .00000000

1252201  EARL SCHRANTZ USA
         SCHRANTZ USA 1                     NW NE 33 47N 91W   1.00000000    .79375000     .05035164
         SCHRANTZ USA 3                     SW SE 32 47N 91W   1.00000000    .79375000     .05035164
         SCHRANTZ USA 4                     SW SW 32 47N 91W   1.00000000    .79375000     .05035164
         SCHRANTZ USA 5                     NE SW 32 47N 91W   1.00000000    .79375000     .05035164

1252202  TOLMAN USA
         TOLMAN USA 2                       NW SW 28 47N 91W   1.00000000    .87500000     .00000000
         TOLMAN USA 3                       NW NW 28 47N 91W   1.00000000    .87500000     .00000000

1252203  CALDWELL USA #1-7
         CALDWELL USA 1-7                   LO 12 07 47N  91W   .55480654     .47179217     .00000000

1252204  FAURE USA
         USA FAURE 1                        NW NW 11 47N 92W   1.00000000    .82500000     .00000000
         USA FAURE 2                        NW SE 11 47N 92W   1.00000000    .82500000     .00000000
         USA FAURE 4                        NW SW 11 47N 92W   1.00000000    .82500000     .00000000

1252205  FAURE "A" USA
         USA FAURE A2-2                     NE NE 02 47N 92W   1.00000000    .82500000     .00000000

1252206  LACOY FEDERAL
         LACOY FEDERAL 13-1                 NW NW 13 47N 92W   1.00000000    .82500000     .00000000

1252207  BEARD FEDERAL
         BEARD FEDERAL 1                    NW NW 12 47N 92W   1.00000000    .84900000     .00000000

1252211  ROME FEDERAL
         ROME FEDERAL 1                     SE SE 02 46N 92W   1.00000000    .81250000     .06250000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 2
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

NON-UNITIZED ASSETS (CO-OP)

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>

1252213  NEIBER II UNIT (TENSLEEP)
         NEIBER UNIT II-I                  49043202610000      NEIBER DOME           BEPCO         PRD

1252215  SOUTH FRISBY LACOY FED #5 & #8
         SOUTH FRISBY 5                    49043202630000      SOUTH FRISBY          BEPCO         PRD
         SOUTH FRISBY 8                    49043203950000      SOUTH FRISBY          BEPCO         PRD

1252217  CALDWELL USA #20
         CALDWELL 1-20                     49043203960000      COTTONWOOD CREEK      BEPCO         PRD
         CALDWELL 2-20                     49043203990000      COTTONWOOD CREEK      BEPCO         PRD

1252218  SMITH USA #30
         SMITH USA 1-30                    49043203620000      SOUTH FRISBY          BEPCO         PRD

1252219  TENNECO FEDERAL #23
         TENNECO FEDERAL 1-23              49043204960000      SOUTH FRISBY          BEPCO         PRD

1252220  COTTONWOOD CREEK FEDERAL #19
         COTTONWOOD CREEK FED 19-1         49043203520000      SOUTH FRISBY          BEPCO         PRD

1252328  NO WATER CREEK #4
         NO WATER CREEK 4                  49043200540000      NO WATER CREEK        BEPCO         PA

1252329  NO WATER CREEK #8
         NO WATER CREEK 8                  49043201180000      NO WATER CREEK        BEPCO         TA

1252330  NO WATER CREEK #13
         NO WATER CREEK 13                 49043201230000      NO WATER CREEK        BEPCO         TA

1252331  NO WATER CREEK #15
         NO WATER CREEK 15                 49043201290000      NO WATER CREEK        BEPCO         TA

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION             WI            NRI(1)        ORI(2)
- ------   -----------------------             --------             --            ------        ------
<S>      <C>                                 <C>                 <C>           <C>           <C>
1252213  NEIBER II UNIT (TENSLEEP)
         NEIBER UNIT II-I                    LOT 15 19 45N 92W   .76909143     .67295528     .00000000

1252215  SOUTH FRISBY LACOY FED #5 & #8
         SOUTH FRISBY 5                      LOT 9  19 47N 91W   1.00000000    .85500000     .00000000
         SOUTH FRISBY 8                      NE  NE 24 47N 92W   1.00000000    .85500000     .00000000

1252217  CALDWELL USA #20
         CALDWELL 1-20                       SW  SW 20 47N 91W   1.00000000    .84000000     .00000000
         CALDWELL 2-20                       SW  NW 20 47N 91W   1.00000000    .84000000     .00000000

1252218  SMITH USA #30
         SMITH USA 1-30                      NE  NE 30 47N 91W   1.00000000    .84750000     .00000000

1252219  TENNECO FEDERAL #23
         TENNECO FEDERAL 1-23                SE  NE 23 47N 92W   1.00000000    .87500000     .00000000

1252220  COTTONWOOD CREEK FEDERAL #19
         COTTONWOOD CREEK FED 19-1           NW  SE 19 47N 91W   1.00000000    .85250000     .00000000

1252328  NO WATER CREEK #4
         NO WATER CREEK 4                    LOT 9  31 47N 91W   1.00000000    .82500000     .00000000

1252329  NO WATER CREEK #8
         NO WATER CREEK 8                    SW  NE 31 47N 91W   1.00000000    .82500000     .00000000

252330   NO WATER CREEK #13
         NO WATER CREEK 13                   LOT 11 05 46N 91W   1.00000000    .84500000     .00000000

1252331  NO WATER CREEK #15
         NO WATER CREEK 15                   SW  NE 05 46N 91W   1.00000000    .84500000     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 3
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

NON-UNITIZED ASSETS (CO-OP)

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>

1305001  CHAMBERS STATE
         CHAMBERS STATE #1-36              49043203040000      RATTLESNAKE           BEPCO         PRD
         CHAMBERS STATE #2-36              49043203140000      RATTLESNAKE           BEPCO         PRD
         CHAMBERS STATE #3-36              49043203210000      RATTLESNAKE           BEPCO         PA
         CHAMBERS STATE #4-36              49043207940000      RATTLESNAKE           BEPCO         PRD
         CHAMBERS STATE #5-36              49043208200000      RATTLESNAKE           BEPCO         PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME            LOCATION            WI            NRI(1)        ORI(2)
- ------   -----------------------            --------            --            ------        ------
<S>      <C>                                <C>                <C>           <C>           <C>
1305001  CHAMBERS STATE
         CHAMBERS STATE #1-36               SW SW 36 48N 92W   1.00000000    .84500000     .00000000
         CHAMBERS STATE #2-36               SW SE 36 48N 92W   1.00000000    .84500000     .00000000
         CHAMBERS STATE #3-36               SW NW 36 48N 92W   1.00000000    .84500000     .00000000
         CHAMBERS STATE #4-36               NE SW 36 48N 92W   1.00000000    .84500000     .00000000
         CHAMBERS STATE #5-36               SW NE 36 48N 92W   1.00000000    .84500000     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 4

<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

NON-UNITIZED ASSETS (OSO)

<TABLE>
<CAPTION>
                                                                                                                  STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR                    01/01/98
- ------   -----------------------           ---                 -----                 --------                    --------
<S>      <C>                               <C>                 <C>                   <C>                         <C>
1252303  COSEKA FEDERAL #18-3 & #18-4
         ALTUS GOVERNMENT 18-3             49043203460000      COTTONWOOD CREEK      WAGNER & BROWN, LTD.          PRD
         ALTUS GOVERNMENT 18-4             49043205420000      COTTONWOOD CREEK      WAGNER & BROWN, LTD.          PRD

1252304  GOVERNMENT 29-1
         GOVERNMENT 29-1                   49043202960000      COTTONWOOD CREEK      SAMSON RESOURCES CORP         PA

1252305  COSEKA FEDERAL #13-1, 2 & 3
         ALTUS GOVERNMENT 13-1             49043203310000      COTTONWOOD CREEK      WAGNER & BROWN, LTD.          SI
         ALTUS GOVERNMENT 13-2             49043203470000      COTTONWOOD CREEK      WAGNER & BROWN, LTD.          SI
         ALTUS GOVERNMENT 13-3             49043205560000      COTTONWOOD CREEK      WAGNER & BROWN, LTD.          SI

1252306  COSEKA FEDERAL #18-1 & #18-5
         ALTUS GOVERNMENT 18-1             49043203200000      COTTONWOOD CREEK      WAGNER & BROWN, LTD.          PRD
         ALTUS GOVERNMENT 18-5             49043205740000      COTTONWOOD CREEK      WAGNER & BROWN, LTD.          PRD

1252307  BRENT FEDERAL #2 & #3 FED #32-1
         BRENT FEDERAL 2                   49043203920000      COTTONWOOD CREEK      BRENT EXPLORATION, INC.       SI
         BRENT FEDERAL 3                   49043203930000      COTTONWOOD CREEK      BRENT EXPLORATION, INC.       SI
         FEDERAL 32-1                      49043205090000      COTTONWOOD CREEK      BRENT EXPLORATION, INC.       SI

1252308  MARTIN FEDERAL #29-2
         MARTIN FEDERAL 29-2               49043203300000      COTTONWOOD CREEK      SAMSON RESOURCES CORP         PRD

1252309  GOVERNMENT #14-2
         GOVERNMENT #14-2                  49043202920000      RATTLESNAKE           SAMSON RESOURCES CORP         SI

1252310  TENNECO GOVERNMENT #1-1 & 1-2
         TENNECO GOVERNMENT 1-2            49043202940000      COTTONWOOD CREEK      SAMSON RESOURCES CORP         SI

1252311  GOVERNMENT #27-1
         GOVERNMENT 27-1                   49043202810000      COTTONWOOD CREEK      MARKUS PRODUCTION, INC.       PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME            LOCATION               WI            NRI(1)        ORI(2)
- ------   -----------------------            --------               --            ------        ------
<S>      <C>                                <C>                   <C>           <C>           <C>
1252303  COSEKA FEDERAL #18-3 & #18-4
         ALTUS GOVERNMENT 18-3              SE  NW 18 47N 91W     .00000000     .00000000     .09000000
         ALTUS GOVERNMENT 18-4              NW  NW 18 47N 91W     .00000000     .00000000     .09000000

1252304  GOVERNMENT 29-1
         GOVERNMENT 29-1                    SW  SW 29 47N 91W     .00000000     .00000000     .00000000

1252305  COSEKA FEDERAL #13-1, 2 & 3
         ALTUS GOVERNMENT 13-1              NE  NE 13 47N 92W     .00000000     .00000000     .09500000
         ALTUS GOVERNMENT 13-2              NE  SE 13 47N 92W     .00000000     .00000000     .09500000
         ALTUS GOVERNMENT 13-3              NW  NE 13 47N 92W     .00000000     .00000000     .09500000

1252306  COSEKA FEDERAL #18-1 & #18-5
         ALTUS GOVERNMENT 18-1              Lot 12 18 47N 91W     .00000000     .00000000     .08874760
         ALTUS GOVERNMENT 18-5              NE  SW 18 47N 91W     .00000000     .00000000     .08874760

1252307  BRENT FEDERAL #2 & #3 FED #32-1
         BRENT FEDERAL 2                    SW  NE 32 47N 91W     .00000000     .00000000     .09472400
         BRENT FEDERAL 3                    SW  NW 33 47N 91W     .00000000     .00000000     .09472400
         FEDERAL 32-1                       NE  NE 32 47N 91W     .00000000     .00000000     .09472400

1252308  MARTIN FEDERAL #29-2
         MARTIN FEDERAL 29-2                SW  NW 29 47N 91W     .04848480     .03636360     .09000000

1252309  GOVERNMENT #14-2
         GOVERNMENT #14-2                   NW  NW 14 47N 92W     .00000000     .00000000     .06250000

1252310  TENNECO GOVERNMENT #1-1 & 1-2
         TENNECO GOVERNMENT 1-2             SW  NW 01 47N 92W     .00000000     .00000000     .01875000

1252311  GOVERNMENT #27-1
         GOVERNMENT 27-1                    SW  SW 27 47N 92W     .26666640     .19999980     .08500000

</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 1
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

NON-UNITIZED ASSETS (OSO)

<TABLE>
<CAPTION>
                                                                                                                  STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR                    01/01/98
- ------   -----------------------           ---                 -----                 --------                    --------
<S>      <C>                               <C>                 <C>                   <C>                         <C>
1252313  BRENT FEDERAL #11-1
         BRENT FEDERAL 11-1                49043204440000      COTTONWOOD CREEK      WASHAKIE ENERGIES CO. LT       PRD

1252314  BRENT FEDERAL #16-1
         BRENT FEDERAL 16-1                49043204480000      COTTONWOOD CREEK      WASHAKIE ENERGIES CO. LT       PRD

1252316  SCHETTERLY #1-30
         ALTUS SCHETTERLY 1-30             49043203630000      SOUTH FRISBY          BRENT EXPLORATION, INC.        PRD

1252317  BRENT FEDERAL #3-25
         BRENT FEDERAL 3-25                49043204330000      SOUTH FRISBY          BRENT EXPLORATION, INC.        PRD

1252318  BRENT FEDERAL 13-24
         BRENT FEDERAL 13-24               49043204600000      FRISBY SOUTH          BRENT EXPLORATION, INC.        PRD

1252319  BRENT FEDERAL 25-7
         BRENT FEDERAL 25-7                49043205360000      FRISBY SOUTH          ANDERSON MYERS                 PA

1252320  TENNECO USA #1
         TENNECO USA 1                     49043205910000      COTTONWOOD CREEK      CAROL-HOLLY OIL CORP.          PRD

1252321  GOVERNMENT #25-1
         GOVERNMENT 25-1                   49043202990000      SOUTH FORK            MARKUS PRODUCTION, INC.        PRD

1252322  GOVERNMENT #36-1
         GOVERNMENT 36-1                   49043202890000      COTTONWOOD CREEK      MARKUS PRODUCTION, INC.        SI

1252324  TENNECO USA 2
         TENNECO USA 2                     49043206080000      COTTONWOOD CREEK      WYOMING RESOURCES              PA

1252325  TENNECO USA #3
         TENNECO USA 3                     49043206230000      COTTONWOOD CREEK      CAROL-HOLLY OIL CORP.          PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME            LOCATION              WI            NRI(1)        ORI(2)
- ------   -----------------------            --------              --            ------        ------
<S>      <C>                                <C>                  <C>           <C>           <C>
1252313  BRENT FEDERAL #11-1
         BRENT FEDERAL 11-1                 NE SW 01 46N 92W     .00000000     .00000000     .05000000

1252314  BRENT FEDERAL #16-1
         BRENT FEDERAL 16-1                 SE SE 01 46N 92W     .00000000     .00000000     .05000000

1252316  SCHETTERLY #1-30
         ALTUS SATTTERLY 1-30               NE SE 30 47N 91W     .00000000     .00000000     .06500000

1252317  BRENT FEDERAL #3-25
         BRENT FEDERAL 3-25                 NE NW 25 47N 92W     .00000000     .00000000     .05000000

1252318  BRENT FEDERAL 13-24
         BRENT FEDERAL 13-24                SW SW 24 47N 92W     .00000000     .00000000     .05000000

1252319  BRENT FEDERAL 25-7
         BRENT FEDERAL 25-7                 SW NE 25 47N 92W     .00000000     .00000000     .00000000

1252320  TENNECO USA #1
         TENNECO USA 1                      SW SE 25 47N 92W     .00000000     .00000000     .10000000

1252321  GOVERNMENT #25-1
         GOVERNMENT 25-1                    SE NW 25 46N 92W     .00000000     .00000000     .12500000

1252322  GOVERNMENT #36-1
         GOVERNMENT 36-1                    NE NE 36 47N 92W     .26666640     .19999980     .03750000

1252324  TENNECO USA 2
         TENNECO USA 2                      SE SW 28 47N 91W     .00000000     .00000000     .00000000

1252325  TENNECO USA #3
         TENNECO USA 3                      SE NW 28 47N 91W     .12500000     .11312500     .05000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 2
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

NON-UNITIZED ASSETS (OSO)

<TABLE>
<CAPTION>
                                                                                                                  STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR                    01/01/98
- ------   -----------------------           ---                 -----                 --------                    --------
<S>      <C>                               <C>                 <C>                   <C>                         <C>

1252327  RATTLESNAKE USA #4
         RATTLESNAKE 4                     49043206330000      COTTONWOOD CREEK      CAROL-HOLLY OIL CORP.           SI

1252332  BRENT FEDERAL #1
         BRENT FEDERAL #1                  49043203910000      COTTONWOOD CREEK      BRENT EXPLORATION CO            SI

1252333  HONEY BUTTE FEDERAL #3
         HONEY BUTTE FEDERAL #3            49043203390000      RATTLESNAKE           HANSON OPERATING COMPANY        PRD

1252334  GOVERNMENT #14-1
         GOVERNMENT 14-1                   49043201140000      RATTLESNAKE           MARKUS PRODUCTION, INC.         SI

1252335  TENNECO GOVERNMENT #1-3
         TENNECO GOVERNMENT 1-3            49043203030000      COTTONWOOD CREEK      SAMSON RESOURCES CORP           PRD

1252336  TENNECO GOVERNMENT #1-4
         TENNECO GOVERNMENT 1-4            49043203010000      COTTONWOOD CREEK      SAMSON RESOURCES CORP           PRD

1252337  GOVERNMENT #28-1
         GOVERNMENT 28-1                   49043202970000      COTTONWOOD CREEK      MARKUS PRODUCTION, INC.         SI

1252338  GOVERNMENT #36-2
         GOVERNMENT 36-2                   49043203050000      COTTONWOOD CREEK      MARKUS PRODUCTION, INC.         SI

1256101  BASS FEDERAL 33-24 #1H
         #1 H BASS FEDERAL 33-24           49043207100000      MARSHALL              UNION PACIFIC RESOURCES         PRD

1288501  SAGEBUSH FEDERAL #13-25
         SAGEBUSH FED #13-25               49003208230000      SAGEBUSH              ALV COMPANY                     PRD

1288502  SAGEBUSH FEDERAL #32-26
         SAGEBUSH #32-26                   49003208270000      SAGEBUSH              ALV COMPANY                     PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME       LOCATION             WI            NRI(1)        ORI(2)
- ------   -----------------------       --------             --            ------        ------
<S>      <C>                           <C>                  <C>           <C>           <C>
1252327  RATTLESNAKE USA #4
         RATTLESNAKE 4                 SE NW 11 47N 92W     .05000000     .04245000     .00000000

1252332  BRENT FEDERAL #1
         BRENT FEDERAL #1              NE NW 31 47N 91W     .00000000     .00000000     .09000000

1252333  HONEY BUTTE FEDERAL #3
         HONEY BUTTE FEDERAL #3        SW SE 16 47N 91W     .10000000     .08350000     .00000000

1252334  GOVERNMENT #14-1
         GOVERNMENT 14-1               NW NE 14 47N 92W     .26666640     .19999978     .06250000

1252335  TENNECO GOVERNMENT #1-3
         TENNECO GOVERNMENT 1-3        SW NE 01 47N 92W     .25291700     .18652630     .01875000

1252336  TENNECO GOVERNMENT #1-4
         TENNECO GOVERNMENT 1-4        SW SE 01 47N 92W     .22736810     .16768400     .01875000

1252337  GOVERNMENT #28-1
         GOVERNMENT 28-1               SW SE 28 47N 92W     .04848480     .03636360     .08500000

1252338  GOVERNMENT #36-2
         GOVERNMENT 36-2               NE NW 36 47N 92W     .22736810     .17052610     .03750000

1256101  BASS FEDERAL 33-24 #1H
         #1 H BASS FEDERAL 33-24       SW SE 24 48N 92W     .00000000     .00000000     .03187499

1288501  SAGEBUSH FEDERAL #13-25
         SAGEBUSH FED #13-25           NW SW 25 51N 92W     .00000000     .00000000     .00830000

1288502  SAGEBUSH FEDERAL #32-26
         SAGEBUSH #32-26               SW NE 26 51N 92W     .00000000     .00000000     .04000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.

                                                                        Page: 3
<PAGE>

                                     Exhibit "C"

                             PURCHASE AND SALE AGREEMENT

                                DATED: MARCH 28. 1998

                             ASSIGNMENT AND BILL OF SALE

STATE OF WYOMING         )
                         )    KNOW ALL MEN BY THESE PRESENTS, THAT
COUNTY OF __________     )

     THIS ASSIGNMENT AND BILL OF SALE ("Assignment") is made effective as of
7:00 a.m., Mountain Standard Time on June 1, 1998 (the "Effective Time") by and
between the undersigned parties under "ASSIGNORS" (hereinafter collectively
referred to as "Assignor"), all having an address of 201 Main Street, Fort
Worth, Texas 76102; and Continental Resources, Inc. (hereinafter referred to as
"Assignee"), whose address is P.O. Box 1032, Enid, Oklahoma 73702.

     Assignor, for Ten Dollars ($10.00) and other good and valuable
consideration in hand by Assignee, the receipt and sufficiency of which is
hereby acknowledged, by these PRESENTS DOES hereby GRANT, BARGAIN, SELL, CONVEY,
ASSIGN, TRANSFER, SET OVER, AND DELIVER unto Assignee, the following described
properties:

     A.    All rights, titles, and interests of Assignor in an to: 1) the oil,
     gas, and mineral leases described in Exhibit A hereto (including
     landowner's royalty and any ratifications and amendments to such leases,
     whether such ratifications and amendments are described in Exhibit A); and
     2) the wells described in Exhibit B hereto;

     B.   All rights, titles, and interests of Assignor in and to, or otherwise
     derived from, all presently existing and valid oil, gas, and mineral
     unitization, pooling, and communitization agreements, declarations, and
     orders (including, without limitation, all units formed under orders,
     rules, regulations, or other official acts of any federal, state, or other
     authority having jurisdiction, and voluntary unitization agreements,
     designations, and declarations) relating to the properties described in
     Paragraph A. to the extent such rights, titles, and interests are
     attributable to the properties described in Paragraph A.;

     C.   All rights, titles, and interests of Assignor in and to all presently
     existing and valid production sales contracts, operating agreements, and
     other agreements and contracts that relate to any of the properties
     described in Paragraphs A. and B., to the extent such rights, titles, and
     interests are assignable and attributable to the properties described in
     Paragraphs A. and B.;

     D.   All rights, titles, and interests of Assignor in and to all
     rights-of-way, easements, surface leases, permits, and licenses appurtenant
     to the properties described in Paragraphs A. and B.; and,

     E.   All rights, titles, and interests of Assignor in and to all materials,
     supplies, machinery. equipment, improvements, and other personal property
     and fixtures (including, but not limited to, wellhead equipment, pumping
     units, flowlines, tanks, buildings, injection facilities. saltwater
     disposal facilities, compression facilities, gathering systems, and other
     equipment) located on the properties described in Paragraphs A. and B. and
     used in connection with the exploration, development, operation, or
     maintenance thereof.

The rights, titles, and interests of Assignor described above in Paragraphs A.,
B., C., D., and E. and conveyed to Assignee hereby are herein sometimes
collectively called the "Purchased Properties".

     TO HAVE AND TO HOLD unto Assignee, its successors and assigns, forever the
Purchased Properties subject to the following terms and conditions:

<PAGE>

     1.   PURCHASE AND SALE AGREEMENT:  This Assignment is made subject to that
     certain Purchase and Sale Agreement dated ________________, by and between
     Assignor and Assignee affecting the sale of the Purchased Properties.

     2.   ASSUMPTION AND INDEMNIFICATION:  Assignee, by acceptance of this
     Assignment, hereby covenants and agrees to assume, to pay and perform
     timely, all duties, expenses, obligations, losses, hazards, and liabilities
     relating to the ownership or operation of the Purchased Properties arising
     on and after the Effective Time (including, without limitation, those
     arising under or by virtue of any lease, contract, agreements, document,
     permit or rule, or delay in obtaining approval of federal or state
     assignments); and, to release, indemnify, defend, and hold harmless
     Assignor from and against any and all claims, actions, liabilities, losses,
     damages, costs, or expenses (including court costs and attorneys' fees) of
     any kind or character arising out of or otherwise relating to the ownership
     or operation of the Purchased Properties on and after the Effective Time.
     In connection with (but not in limitation of) the foregoing, it is
     specifically understood and agreed that matters arising out of or otherwise
     relating to the ownership or operation of the Purchased Properties on and
     after the Effective Time shall be deemed to include all matters arising out
     of the status and the condition of the Purchased Properties on the
     Effective Time including, without limitation, all obligations to properly
     plug and abandon wells located on the Purchased Properties, to restore the
     surface of the Purchased Properties to as near its original condition as
     practicable and to comply with, or bring the Purchased Properties into
     compliance with applicable environmental laws and regulations, including
     all liability and expense for any restoration, remediation, clean-up,
     disposal of waste, or removal that may be incurred as a result of the
     existence or discovery of naturally occurring radioactive materials, or
     other hazardous or deleterious substances in, on, under, or associated with
     the Purchased Properties, regardless of when the events occurred that give
     rise to such condition, and the above provided for assumptions and
     indemnifications by Assignee shall expressly cover and include such
     matters. The foregoing assumptions and indemnifications shall apply whether
     or not such duties, obligations, or liabilities, or such claims, actions,
     causes of action, liabilities~ damages, losses, costs, or expenses arise
     out of (i) negligence (including sole negligence, simple negligence,
     concurrent negligence, active or passive negligence, or otherwise, but
     expressly not including gross negligence or willful misconduct) of
     Assignor, or (ii) strict liability.

     3.   ENVIRONMENTAL ASSESSMENT AND INDEMNIFICATION BY ASSIGNEE:  Assignee
     hereby acknowledges that it has made an environmental assessment of the
     Purchased Properties, or has been afforded the opportunity to do so, and
     satisfied itself as to the physical and environmental condition of the
     Purchased Properties, both surface and subsurface. Assignee hereby assumes
     the risks that the Purchased Properties may contain waste materials or
     hazardous substances, and that adverse physical conditions, including, but
     not limited to, the presence of waste materials or hazardous substances or
     the presence of unknown abandoned oil and gas wells, water wells, sumps and
     pipelines, may exist in, on, or under the properties as of the Effective
     Time, all responsibility and liability related to all such conditions,
     whether known or unknown, are hereby transferred from Assignor to Assignee.
     Assignee assumes full responsibility for, and agrees to indemnify, hold
     harmless, and defend Assignor from and against all loss, liability, claims,
     fines, expenses, costs (including attorneys' fees and expenses), and causes
     of action caused by or arising out of any federal, state, or local laws,
     rules, orders, and regulations applicable to any naturally occurring
     radioactive materials, waste material, or hazardous substances on or
     associated with the Purchased Properties or the presence, disposal, release
     or threatened release of all naturally occurring radioactive materials,
     waste material, or hazardous substances from the Purchased Properties into
     the atmosphere or into or upon land or any water course or body of water,
     including ground water, whether attributable to Assignor's activities or
     the activities of third parties (regardless of whether Assignor was or is
     aware of such activities prior to, during, or after the period of
     Assignor's ownership of the Purchased Properties. This indemnification and
     assumption shall also apply to liability or voluntary environmental
     response actions undertaken pursuant to the Comprehensive Environmental
     Response Compensation and Liability Act (CERCLA) or any other federal,
     state or local law.

     4.   DISCLAIMER OF WARRANTIES:  Assignee acknowledges that it has relied
     solely on its own independent investigation of the Purchased Properties,
     both surface and subsurface, in making its decision to acquire the
     Purchased Properties; and, that Assignor has made no 

<PAGE>

     representations or warranties as to the accuracy or completeness of any 
     information which may have been provided Assignee by Assignor.  Assignee 
     accepts all personal property and fixtures associated with the Purchased 
     Properties "AS IS" and "WHERE IS" and Assignor hereby expressly disclaims,
     negates, and makes this Assignment with NO WARRANTY OR REPRESENTATION, 
     EXPRESS OR IMPLIED, AT COMMON LAW, BY STATURE, OR OTHERWISE, RELATING TO 
     THE PURCHASED PROPERTIES AS TO DESCRIPTION, QUANTITY, QUALITY, 
     CONDITION, FITNESS FOR A PARTICULAR PURPOSE, CONFORMITY TO MODELS, OR 
     SAMPLES OF MATERIALS, OR MERCHANTABILITY, OR OTHERWISE.

     5.   FEDERAL AND STATE ASSIGNMENTS:  Separate state and federal assignments
     of the Purchased Properties will be prepared by Assignor into Assignee
     using the approved forms of the appropriate governmental agency. Such
     assignments shall be deemed to contain all of the rights, titles,
     interests, assumptions, indemnifications, disclaimers, and lack of
     warranties as set forth herein, as though fully set forth in such
     assignments, but no more. The interests conveyed by such separate
     assignments are the same and. not in addition to, the interests conveyed
     hereunder.

     6.   WARRANTY OF TITLE:  This Assignment is made without warranty of title
     of any kind, express or implied, except that Assignor agrees to defend
     title against claims and demands of all persons claiming the same by,
     through or under Assignor, but not otherwise. This Assignment may be signed
     in any number of counterparts, each of which shall be deemed to be an
     original, but all such counterparts shall constitute but one and the same
     Assignment.

     All of the terms and provisions of this Assignment shall be binding upon
and inure to the benefit of Assignee and Assignor and their respective heirs,
successors, representatives, and assigns.

     All exhibits referenced herein and attached hereto are by reference
incorporated into this Assignment.

     IN WITNESS WHEREOF, this Assignment was executed on the dates contained in
the acknowledgments herein, but to be effective as of the Effective Time as
stated in the first paragraph hereof.

                                       ASSIGNORS

                                       BASS ENTERPRISES PRODUCTION CO.


                                   By:
                                      ----------------------------------------
                                      Perry R. Bass, Inc.,
                                      Sid R. Bass, Inc.,
                                      Lee M. Bass, Inc.,
                                      Keystone, Inc.,
                                      Thru Line Inc.



                                   By:
                                      ----------------------------------------

                                      GOLIAD PARTNERS,
                                      LIMITED PARTNERSHIP

<PAGE>

                                   By:
                                      ----------------------------------------
                                                  , General Partner


                                      ----------------------------------------
                                      PERRY R. BASS, TRUSTEE


                                      ----------------------------------------
                                      SID R. BASS, TRUSTEE


                                      ----------------------------------------
                                      Sid R. Bass

                                      ----------------------------------------
                                      Lee M. Bass

                                      D. W. GENPAR, INC.


                                   By:
                                      ----------------------------------------
                                      W. D. PROPERTIES,

                                      LIMITED PARTNERSHIP


                                   By:
                                      ----------------------------------------
                                                  , General Partner

                                      WPH-GP, INC.


                                   By:
                                      ----------------------------------------

                                      WORLAND ASSOCIATES


                                   By:
                                      ----------------------------------------

                                      WORLAND ASSOCIATES II


                                   By:
                                      ----------------------------------------

                                      ASSIGNEE

ATTEST:


By:                                By:
    ----------------------------      ----------------------------------------
NAME:                              Name:
    ----------------------------        --------------------------------------
Title:                             Title:
      --------------------------         -------------------------------------

<PAGE>

                              (ACKNOWLEDGMENTS ATTACHED)

STATE OF_____________    )
                         )  ss.
COUNTY OF___________     )

     Before me, the undersigned, a Notary Public, in and for said County and
State, on this _____ day of _____________, 19___, personally appeared 
__________________________________________________________________________, 
known to me to be the identical person who executed the within and foregoing 
instrument and acknowledged to me that _____ executed the same as _____ free 
and voluntary act and deed for the uses and purposes therein set forth.

     Given under my hand and seal the day and year last above written.

My Commission Expires:
                                       ---------------------------------------
                                       Notary Public
- ---------------------


STATE OF_____________    )
                         )  ss.
COUNTY OF___________     )

     Before me, the undersigned, a Notary Public, in and for said County and
State, on this _____ day of _____________, 19___, personally appeared 
__________________________________________________________________________, 
known to me to be the identical person who executed the within and foregoing 
instrument and acknowledged to me that _____ executed the same as _____ free 
and voluntary act and deed for the uses and purposes therein set forth.

     Given under my hand and seal the day and year last above written.

My Commission Expires:
                                       ---------------------------------------
                                       Notary Public
- ---------------------


STATE OF_____________    )
                         )  ss.
COUNTY OF___________     )

     Before me, the undersigned, a Notary Public, in and for said County and
State, on this _____ day of _____________, 19___, personally appeared 
____________________________________________________________________________, 
known to me to be the identical person who executed the within and foregoing 
instrument and acknowledged to me that _____ executed the same as _____ free 
and voluntary act and deed for the uses and purposes therein set forth.

     Given under my hand and seal the day and year last above written.

My Commission Expires:
                                       ---------------------------------------
                                       Notary Public
- ---------------------

<PAGE>



                                 EXHIBIT "D"


                         PURCHASE AND SALE AGREEMENT


                             DATED MARCH 28, 1998


              SUITS, ACTIONS, OR OTHER LEGAL PROCEEDINGS PENDING


                                    -NONE-


<PAGE>

                                  EXHIBIT "E"


                         PURCHASE AND SALE AGREEMENT


                             DATED MARCH 28, 1998
<TABLE>
<CAPTION>
                                                               TOTAL
CATEGORY                               SUB-ALLOCATION        ALLOCATION
- --------                               --------------        ----------
<S>                                    <C>                   <C>
A.  PRODUCING UNITS:

    1.  Cottonwood Creek Unit          $45,834,673.00

    2.  Cottonwood Creek Field           8,368,161.00
        Extension (Phosphoria) Unit

    3.  No Water Creek Unit              4,813,056.00

    4.  Slick Creek Unit                 9,956,948.00

    5.  South Frisby Unit                3,057,508.00

           TOTAL CATEGORY A.                               $72,030,346.00

B.  PRODUCING NON-UNITIZED PROPERTIES:                     $11,969,654.00

C.  NON-PRODUCING LEASEHOLD:                               $ 2,500,000.00

        BASE PURCHASE PRICE                                $86,500,000.00

</TABLE>

<PAGE>
                                       
                       WORLAND AREA PURCHASE AND SALE AGREEMENT

     This Worland Area Purchase and Sale Agreement ("Agreement") is made and 
entered into on this 25th day of June, 1998 by and between Continental 
Resources, lnc., ("Seller") and Harold G. Hamm, Trustee of the Harold G. Hamm 
Revocable Intervivos Trust dated April 23, 1984 ("Buyer").

     WHEREAS, pursuant to that certain Purchase and Sale Agreement dated 
March 28, 1998, a copy of which is attached hereto as Exhibit "A", and 
subsequent Assignment and Bill of Sale documents, which are described on the 
Exhibit "B" attached hereto, Seller did acquire certain oil and gas wells, 
leases and other rights from several parties.  Such documents are 
collectively referred to herein as the "BEPCO documents".  The conveyance of 
interest effected by such documents is herein referred to as the "BEPCO 
Acquisition".

     AND WHEREAS, the Buyer desires to purchase, and Seller desires to sell, 
an undivided fifty percent (50%) of all right, title and interest of 
whatsoever nature which Seller acquired in the BEPCO Acquisition.

     NOW THEREFORE, in consideration of the mutual benefit to accrue to the 
parties hereto and other good and valuable consideration, the receipt and 
sufficiency of which is hereby acknowledged, Seller and Buyer do hereby agree 
as follows:

     1.   PURCHASE PRICE AND PROPERTY BEING SOLD AND PURCHASED:  In and for a 
total purchase price of $42,550,000.00, Seller shall sell, assign, transfer 
and convey unto Buyer an undivided fifty (50%) of all Seller's right, title 
and interest in and to the following:

     A.   All oil & gas leases, overriding royalty interests, mineral and
          royalty interests, easements and rights-of-way, contractual rights and
          interests, together with all rights and interests appurtenant thereto
          or used or obtained in connection therewith which were acquired by
          Seller in connection with the BEPCO Acquisition and by virtue of the
          BEPCO Documents, and;

     B.   All oil and gas wells and interests therein, together with all
          materials, supplies, machinery, equipment, improvements and other
          personal property and fixtures located thereon, associated therewith
          or appurtenant thereto that were acquired by Seller in connection with
          the BEPCO Acquisition and by virtue of the BEPCO Documents.  Such
          wells are described on Exhibit "C" hereto

     2.   EFFECTIVE DATE:  The Effective Time of the conveyance contemplated 
by this Agreement shall be 7:00 a.m., Mountain Standard Time on June 1, 1998. 
It is the intent of the parties that the interest is conveyed from Seller to 
Buyer effective as of the same time which Seller received the interests 
pursuant to the BEPCO Documents, same as if Buyer had been a party thereto.

<PAGE>

     3.   COVENANTS AND REPRESENTATIONS OF SELLER AND BUYER:  To the extent 
applicable, Seller and Buyer do hereby adopt and make the same covenants and 
representations to one another as were made by the Seller and Buyer in the 
Purchase and Sale Agreement attached hereto as Exhibit "A".

     4.   DESIGNATION OF OPERATOR:  Buyer agrees that Seller shall remain and 
be Operator of all jointly owned existing or hereafter drilled, created or 
acquired units, wells and leases. Buyer agrees to execute any required 
Operating Agreements, Unit Agreements or other documents that are now or 
hereafter may become necessary to effectuate and/or support Seller being 
designated as Operator of such jointly owned units, wells or leases.

     5.   AREA OF MUTUAL INTEREST:  An Area of Mutual Interest ("AMI") is 
hereby created which covers the lands outlined on the plat attached hereto as 
Exhibit "D".  During the term of the AMI, which is ten (10) years from the 
date hereof, should either party acquire an interest of whatsoever nature in 
the AMI, it shall immediately offer the other party it's proportionate part 
of such acquired interest.  The non-acquiring party shall have thirty (30) 
days from receipt of notice within which to advise the acquiring party 
whether it wants to acquire it's proportionate part of such interest for the 
actual acquisition cost thereof.  The parties proportionate interests in the 
AMI is 50% each.

     6.   CLOSING:  On or before July 1, 1998 Buyer shall deliver to Seller 
the full purchase price.  Immediately upon receipt thereof, Seller shall 
deliver to Buyer a fully executed Assignment and Bill of Sale which conveys 
interests to the properties, rights and interests being purchased.  Such 
Assignment and Bill of Sale shall be in the form attached hereto as Exhibit 
"E".

     IN WITNESS WHEREOF, this Agreement is made and entered into on this 25th 
day of June, 1998.

                              CONTINENTAL RESOURCES, INC.

                              By: /s/ TOM LUTTRELL
                                      Tom Luttrell
                                      Vice President - Land

                              HAROLD G. HAMM REVOCABLE INTERVIVOS 
                              TRUST DATED APRIL 23, 1984

                              By: /s/ HAROLD HAMM
                              Harold G. Hamm, Trustee

<PAGE>
                                       
                           CONTINENTAL RESOURCES, INC.

July 13, 1998

Harold G. Hamm, Trustee of the Harold G. Hamm
Revocable Intervivos Trust
P.O. Box 1032
Enid, OK  73702

RE:  Worland Area Purchase and Sale Agreement
     dated June 25, 1998

Dear Harold,

Reference is hereby made to that certain Worland Area Purchase and Sale 
Agreement dated June 25, 1998 between Continental Resources, Inc., as Seller 
and The Harold G. Hamm Revocable Intervivos Trust, as Buyer.

This letter is to set forth in writing the agreement of both parties to 
change the Closing date provided for the referenced Agreement by amending 
Article 6, thereof to read as follows: "On or before July 17, 1998 Buyer 
shall deliver to Seller the full purchase price.  Immediately upon receipt 
 ...".  All other provisions shall remain as originally written.

If the foregoing is acceptable with you, please indicate your agreement by 
signing in the space provided below and returning one (1) executed copy of 
this letter to the undersigned.  Thank you.

Sincerely,


/s/ TOM LUTTRELL
Tom Luttrell
Vice President - Land

Agreed to and accepted this 13th day of July, 1998

The Harold G. Hamm Revocable Intervivos Trust dated April 23, 1984

By: /s/ HAROLD HAMM            
        Harold G. Hamm, Trustee


                                 302 N. Independence
                          P.O. Box 1032 Enid, Oklahoma 73702
                                    (580) 233-8955


<PAGE>
                                       
                                   EXHIBIT A




                          PURCHASE AND SALE AGREEMENT


                                 BY AND BETWEEN


                     BASS ENTERPRISES PRODUCTION CO., ET AL


                                   AS SELLERS


                                      AND


                          CONTINENTAL RESOURCES, INC.


                                    AS BUYER


                              DATED MARCH 28, 1998

<PAGE>

<TABLE>
<CAPTION>
                               TABLE OF CONTENTS                         PAGE
<S>                                                                      <C>

 1. Property to be Sold and Purchased  . . . . . . . . . . . . . . . . .   1

 2. Purchase Price . . . . . . . . . . . . . . . . . . . . . . . . . . .   2

 3. Deposit  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   2

 4. Allocation of Base Purchase Price  . . . . . . . . . . . . . . . . .   2

 5. Seller's Representations . . . . . . . . . . . . . . . . . . . . . .   2

 6. Buyer's Representations  . . . . . . . . . . . . . . . . . . . . . .   3

 7. Covenants of Seller and Buyer Pending Closing  . . . . . . . . . . .   4

 8. Due Diligence Reviews  . . . . . . . . . . . . . . . . . . . . . . .   6

 9. Adverse Environmental Conditions . . . . . . . . . . . . . . . . . .   8

10. Disposal of Materials, Substances, and Wastes; Compliance
        with Law . . . . . . . . . . . . . . . . . . . . . . . . . . . .   10

11. Certain Price Adjustments to the Base Purchase Price . . . . . . . .   11

12. Conditions Precedent to Buyer's Obligations  . . . . . . . . . . . .   12

13. Conditions Precedent to Seller's Obligations . . . . . . . . . . . .   13

14. The Closing  . . . . . . . . . . . . . . . . . . . . . . . . . . . .   13

15. After Closing  . . . . . . . . . . . . . . . . . . . . . . . . . . .   15

16. Certain Accounting Adjustments to the Purchase Price . . . . . . . .   16

17. Assumption and Indemnification . . . . . . . . . . . . . . . . . . .   18

18. Environmental Assessment and Indemnification by Buyer  . . . . . . .   19

<PAGE>

19. Disclaimer of Warranties . . . . . . . . . . . . . . . . . . . . . .   19

20. Buyer's Covenant Not to Sue Seller Group . . . . . . . . . . . . . .   20

21. Commissions  . . . . . . . . . . . . . . . . . . . . . . . . . . . .   20

22. Casualty Loss  . . . . . . . . . . . . . . . . . . . . . . . . . . .   20

23. Notices  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   20

24. Survival of Provisions . . . . . . . . . . . . . . . . . . . . . . .   20

25. Miscellaneous Matters  . . . . . . . . . . . . . . . . . . . . . . .   21
</TABLE>

Exhibit A - Oil and Gas Leases

Exhibit B - Wells

Exhibit C - Assignment and Bill of Sale

Exhibit D - Suits, Actions, or other Legal Proceedings Pending

Exhibit E - Allocation of Values














                                       3
<PAGE>
                                       
                          PURCHASE AND SALE AGREEMENT

     This Agreement, dated March 28, 1998, is made by and between the 
signatory parties shown below under "Sellers" whose address is 201 Main 
Street, Fort Worth, Texas  76102 (hereinafter collectively called "Seller") 
and Continental Resources, Inc., whose address is P. O. Box 1032, Enid, 
Oklahoma 73702 (hereinafter called Buyer");

                              W I T N E S S E T H:

     WHEREAS, Buyer desires to purchase the Properties, as defined below, 
from Seller, and Seller desires to sell the same Properties to Buyer, subject 
to the terms and conditions of this Agreement.

     WHEREAS, It is the parties' intent that Buyer assume all responsibility 
and liability as provided herein for all matters relating to the Properties 
to be assigned.

     NOW, THEREFORE, In consideration of the mutual promises made herein and 
the benefits to be derived hereunder, and other good and valuable 
consideration, the sufficiency of which is hereby acknowledged, Seller and 
Buyer agree as follows:

     1.   PROPERTY TO BE SOLD AND PURCHASED.  Seller agrees to sell, and 
Buyer agrees to purchase, for the consideration herein set forth, and subject 
to the terms and provisions herein contained, the following described 
Properties, rights, and interests:

          (a)    All rights, titles, and interests of Seller in and to: 1) the
          oil, gas, and mineral leases described in Exhibit A hereto; and 2) the
          wells described in Exhibit B hereto;

          (b)    All rights, titles, and interests of Seller in and to, or
          otherwise derived from, all presently existing and valid oil, gas, and
          mineral unitization, pooling, and communitization agreements,
          declarations, and orders (including, without limitation, all units
          formed under orders, rules, regulations, or other official acts of any
          federal, state, or other authority having jurisdiction, and voluntary
          unitization agreements, designations, and declarations) relating to
          the properties described in subsection 1.(a) to the extent such
          rights, titles, and interests are attributable to the properties
          described in subsection 1.(a);

          (c)    All rights, titles, and interests of Seller in and to all
          presently existing and valid production sales contracts, operating
          agreements, and other agreements and contracts that relate to any of
          the properties described in subsections l.a. and l.b., to the extent
          such rights, titles, and interests are assignable and attributable to
          the properties described in subsections 1.(a) and 1.(b);

          (d)    All rights, titles, and interests of Seller in and to all
          rights-of-way, easements, surface leases, permits, and licenses
          appurtenant to the properties described in subsections 1.(a) and
          1.(b); and

          (e)    All rights, titles, and interests of Seller in and to all
          materials, supplies, machinery, equipment, improvements, and other
          personal property and fixtures (including, but not limited to,
          wellhead equipment, pumping units, flowlines, tanks, buildings,
          injection facilities, saltwater disposal facilities, compression
          facilities, gathering systems, and other equipment) located on the
          properties described in subsections 1.(a) and 1.(b) and used in
          connection with the exploration, development, operation, or
          maintenance thereof.

The properties and interests specified in subsections l.(a), l.(b), l.(c), l.(d)
and l.(e) are herein sometimes collectively called the "Properties".  The
defined term "Properties" shall include seismic data, geological or geophysical
data, including interpretations, environmental studies, or other similar data,
or any interpretations thereof or other data or records related thereto.  Seller
shall 

                                       1
<PAGE>

provide Buyer with such data Seller has in its files, excluding any 
interpretations, engineering reports and evaluations, Seller financial 
information and all data which Seller considers proprietary or confidential 
or that Seller cannot provide to Buyer without breaching, or risking a breach 
of, an agreement with a third party.

     2.   PURCHASE PRICE.  The unadjusted purchase price for the Properties 
shall be Eighty Six Million Five Hundred Thousand Dollars ($86,500,000.00), 
payable in United States dollars, (herein called the "Base Purchase Price"). 
The Base Purchase Price may be adjusted, as provided in Sections 7.(c), 11. 
and 16. hereof.  The Base Purchase Price, as so adjusted and as otherwise 
adjusted by mutual agreement of the parties herein, shall be called the 
"Purchase Price."

     3.   DEPOSIT.  Upon entering into this Agreement, as evidence of good 
faith, Buyer shall pay to Seller Eight Million Six Hundred Fifty Thousand 
Dollars ($8,650,000.00) hereinafter called the "Deposit".  If Buyer and 
Seller consummate the transaction contemplated hereby in accordance with the 
terms hereof, the Deposit shall be applied to the Base Purchase Price.  If 
Buyer and Seller do not consummate the transaction contemplated hereby 
because of a material default by Seller, in the absence of a default by 
Buyer, Seller shall return the Deposit to Buyer and shall, in addition, pay 
to Buyer the sum of Two Million Five Hundred Thousand Dollars ($2,500,000.00) 
as liquidated damages and not as a penalty.  Except as provided in Section 
12., if Buyer fails or refuses to consummate the transaction contemplated 
hereby, Seller shall retain the Deposit as liquidated damages and not as a 
penalty.  Buyer stipulates that Seller's damages in the event of Buyer's 
wrongful failure to close would be uncertain and that the amount of 
liquidated damages provided herein is reasonable.  Forfeiture of the Deposit 
as liquidated damages as provided herein shall be Seller's sole remedy at law 
or in equity for Buyer's failure to close as provided in this Agreement.  In 
no event shall the Deposit accrue interest.

     4.   ALLOCATION OF BASE PURCHASE PRICE.  Buyer has allocated the Base 
Purchase Price to the Properties by various categories.  These categories and 
the allocations thereto are shown on Exhibit E and have been made in good 
faith by Buyer and may be relied upon by Seller for all purposes of this 
Agreement.

     5.   SELLER'S REPRESENTATIONS.  Each of the individuals and entities 
comprising Seller represent to Buyer that:

          (a)    Each (other than natural persons) is a legal entity duly
          organized and legally existing under the laws of the State of Texas. 
          Each corporation and limited partnership is qualified to do business
          in Wyoming and is in good standing, or will be at Closing.

          (b)    Each has full power to enter into this Agreement and perform
          its obligations hereunder and has taken all necessary action to enter
          into this Agreement and perform its obligations hereunder.

          (c)    Execution and delivery of this Agreement, the consummation of
          the transaction contemplated hereby, and compliance with the terms
          hereof, will not result in any default under any agreement or
          instrument to which Seller, or any individual party thereof, is a
          party or by which the Properties are bound that would be material to
          this transaction.  Execution and delivery of this Agreement will not
          violate any contractual provision, order, writ, injunction, decree,
          statute, rule, or regulation applicable to Seller, or any individual
          party thereof, or to the Properties that would be material to this
          transaction, except the following:

          (i)  Any waivers of preferential rights to purchase that must be
          obtained from third parties;

          (ii) Compliance with the Hart-Scott-Rodino Antitrust Improvements Act
          of 1976 (the "HSR Act"); and,

                                       2
<PAGE>

          (iii)  Any approvals that must be obtained from governmental entities
          who are lessors under leases included in the Properties (or who
          administer such leases for such lessors) and that are customarily
          obtained post-closing.

          (d)    This Agreement and the Assignment and Bill of Sale provided for
          in Section 14.(a)(i) hereof and any other documentation provided for
          herein to be executed by Seller, will, when executed and delivered,
          constitute the legal, valid, and binding obligations of Seller,
          enforceable according to their terms, except as limited by bankruptcy
          or other laws applicable generally to creditor's rights and as limited
          by general, equitable principles.

          (e)    Except as disclosed on Exhibit D, there are no pending suits,
          actions, or other proceedings in which Seller is a party that
          materially affect the Properties (including, without limitation, any
          actions challenging or pertaining to Seller's title to any of the
          Properties) or affect the execution and delivery of this Agreement or
          the consummation of the transaction contemplated hereby.

     6.   BUYER'S REPRESENTATIONS.  Buyer represents to Seller that:

          (a)    Buyer is a corporation duly organized and legally existing
          under the laws of its state of organization.  Buyer is qualified to do
          business in Wyoming and is in good standing, or will be at Closing.

          (b)    Buyer has full power and ability to enter into and perform its
          obligations under this Agreement (including, but not limited to the
          payment of the Purchase Price at Closing) and has taken all necessary
          action to enter into this Agreement and perform its obligations
          hereunder.

          (c)    Buyer's execution and delivery of this Agreement, the
          consummation of the transaction contemplated hereby, and Buyer's
          compliance with the terms hereof, will not result in any default under
          any agreement or instrument to which Buyer is a party or by which the
          Properties are bound that would be material to this transaction.
          Buyer's execution and delivery of this Agreement will not violate any
          contractual provision, order, writ, injunction, decree, statute, rule,
          or regulation applicable to Buyer or to the Properties that would be
          material to this transaction, except the following:

                 (i)   Any waivers of preferential rights to purchase that must
                 be obtained from third parties;

                 (ii)  Compliance with the "HSR Act;" and,

                 (iii) Any approvals that must be obtained from governmental
                 entities who are lessors under leases included in the
                 Properties (or who administer such leases for such lessors) and
                 that are customarily obtained post-closing.

          (d)    This Agreement and the Assignment and Bill of Sale provided for
          in Section 14.(a)(i) hereof and any other documentation provided for
          herein to be executed by Buyer, will, when executed and delivered,
          constitute, the legal, valid, and binding obligations of Buyer,
          enforceable according to their terms, except as limited by bankruptcy
          or other laws applicable generally to creditor's rights and as limited
          by general, equitable principles.

          (e)    There are no pending suits, actions, or other proceedings in
                 which Buyer is a party that materially affect the execution and
                 delivery of this Agreement or the consummation of the
                 transaction contemplated hereby.

                                       3
<PAGE>

          (f)    Buyer is a knowledgeable purchaser, owner, and operator of oil
          and gas properties, has the ability to evaluate, and has evaluated,
          the Properties for purchase, and is acquiring the Properties for its
          own account and not with the intent to make a distribution within the
          meaning of the Securities Act of 1933, as amended (and the rules and
          regulations pertaining thereto), or a distribution thereof in
          violation of any other applicable securities laws, rules, or
          regulations.

          (g)    Buyer wishes to replace Seller as operator ln every well
          described on Exhibit B which Seller presently operates.  Accordingly,
          Buyer is, or will become, qualified to operate such Properties under
          the applicable laws, rules, and regulations of the jurisdiction in
          which such Properties are located.

     7.   COVENANTS OF SELLER AND BUYER PENDING CLOSING.  Between the date of 
this Agreement and the Closing Date:

          (a)    Seller shall permit Buyer access as follows:

                 (i)  Seller shall give Buyer and its attorneys and other
                 representatives, who have a legitimate need to know, access at
                 all reasonable times during normal business hours to the
                 Properties and, at Seller's office, to Seller's records
                 (including, without limitation, title files, division order
                 files, well files, production records, equipment inventories,
                 and production severance, and ad valorem tax records)
                 pertaining to the ownership and operation of the Properties, to
                 conduct due diligence reviews as contemplated by Section 8.
                 below. Buyer may make copies of such records at its expense but
                 shall, if Seller so requests, return all copies so made if the
                 Closing does not occur. Seller shall not be obligated to
                 provide Buyer with access to any records or data that Seller
                 considers to be proprietary or confidential or that Seller
                 cannot provide to Buyer without breaching, or risking a breach
                 of, confidentiality agreements with other parties.  Until
                 Closing, all records and data provided shall be subject to the
                 previously executed Confidentiality Agreement between Buyer and
                 Seller. SELLER MAKES NO WARRANTY, AND EXPRESSLY DISCLAIMS ALL
                 WARRANTIES, AS TO THE ACCURACY OR COMPLETENESS OF THE FILES AND
                 OTHER INFORMATION THAT IT MAY PROVIDE TO BUYER OR THAT MAY BE
                 PROVIDED BY OTHERS.

                 (ii)  Seller shall make a good faith effort to give Buyer, or
                 Buyer's authorized representatives, who have a legitimate need
                 to know, at reasonable times and upon adequate notice to
                 Seller, physical access to the Properties for the purpose of
                 inspecting same.  Buyer recognizes that some of the Properties
                 are operated by third parties and that Seller's ability to
                 obtain access to such Properties, and the manner and extent of
                 such access, is subject to the consent of such third parties. 
                 Buyer agrees to comply fully with the rules, regulations, and
                 any instructions issued by Seller or third party (where a
                 Property is operated by such third party) regarding the actions
                 of Buyer while upon, entering, or leaving the Properties.

                 (iii)  If Buyer exercises rights of access under this Section
                 or otherwise, or conducts examinations or inspections under
                 this Section or otherwise, then (a) Buyer will be accompanied
                 by Seller's representative at all times; (b) such access,
                 examination, and inspection shall be at Buyer's sole risk,
                 cost, and expense, and Buyer waives and releases all claims
                 against Seller (its affiliates and their respective directors,
                 officers, employees,attorneys, contractors, and agents) arising
                 in any way therefrom or in any way connected therewith or
                 arising in connection with the conduct of its directors,
                 officers, employees, attorneys, contractors, and agents in
                 connection therewith; and (c) BUYER SHALL RELEASE, INDEMNIFY,
                 DEFEND, AND HOLD HARMLESS 

                                       4
<PAGE>

                 SELLER (AND ITS PARENT, SUBSIDIARY COMPANIES, AND OTHER 
                 AFFILIATES AND THEIR RESPECTIVE OFFICERS, DIRECTORS, 
                 EMPLOYEES, ATTORNEYS, CONTRACTORS, AND AGENTS) (HEREINAFTER 
                 COLLECTIVELY REFERRED TO AS "SELLER GROUP") FROM ANY AND ALL 
                 CLAIMS, ACTIONS, CAUSES OF ACTION, LIABILITIES, DAMAGES, 
                 LOSSES, COSTS, OR EXPENSES (INCLUDING, WITHOUT LIMITATION, 
                 COURT COSTS AND ATTORNEYS' FEES), OR LIENS OR ENCUMBRANCES FOR 
                 LABOR OR MATERIALS, ARISING OUT OF OR IN ANY WAY CONNECTED 
                 WITH SUCH ACCESS, EXAMINATION, AND INSPECTION. THE FOREGOING 
                 RELEASE AND INDEMNIFICATION SHALL APPLY WHETHER OR NOT SUCH 
                 CLAIMS, ACTIONS, CAUSES OF ACTION, LIABILITIES, DAMAGES, 
                 LOSSES, COSTS, OR EXPENSES ARISE OUT OF (i) NEGLIGENCE 
                 (INCLUDING SOLE NEGLIGENCE, SIMPLE NEGLIGENCE, CONCURRENT
                 NEGLIGENCE, ACTIVE OR PASSIVE NEGLIGENCE, OR OTHERWISE, BUT
                 EXPRESSLY NOT INCLUDING GROSS NEGLIGENCE OR WILLFUL MISCONDUCT)
                 OF SELLER OR ANY OTHER INDEMNIFIED PARTY, OR (ii) STRICT
                 LIABILITY.

          (b)    Seller shall continue to conduct its business in its ordinary
          course, and in accordance with all applicable ordinances, statutes,
          rules, and regulations of all local, state, and federal governments. 
          Seller shall not enter into or assume any contract or commitment which
          is not in the ordinary course of business as heretofore conducted in
          association with the Properties and shall carry on its business and
          operate the Properties as a reasonably prudent operator. Subject to
          existing contractual obligations, Seller shall not conduct, or commit
          to participate in, on behalf of Buyer, any operation on the
          Properties, or lands pooled or unitized therewith and shall not enter
          into a contract for the sale of crude oil from the Properties
          continuing in effect past the Effective Date without Buyer's prior
          written consent. However, Seller may take such steps and incur such
          expenses as it deems necessary in its sole opinion to deal with an
          emergency to safeguard any part of the Property without first
          consulting with Buyer.  As soon as possible after the emergency,
          Seller shall advise Buyer of such emergency action.  Except as set
          forth in this Agreement, Seller shall not sell, assign, transfer,
          mortgage, farmout, or otherwise dispose of, abandon, or encumber any
          material portion of the Properties.

          (c)    Seller shall use reasonable efforts, consistent with industry
          practices in transactions of this type, to identify, with respect to
          each material portion of the Properties, (i) all preferential rights
          to purchase that would apply to the transaction contemplated hereby
          and (ii) the parties holding such rights.  In attempting to identify
          the same, Seller shall not be obligated to go beyond its own records.
          Seller shall request from the parties so identified, and in accordance
          with the documents creating such rights, waivers of the preferential
          rights to purchase. Seller shall have no obligation hereunder other
          than to attempt to identify such preferential rights and to request
          such waivers.  Seller shall not be obligated to assure that such
          waivers are obtained.  Seller may tender to any party refusing to
          waive such a preferential right the interest covered by such right at
          a value as mutually agreed to by Buyer and Seller which shall be made
          in good faith, but in no event shall the value of a well exceed the
          value assigned to it by Ryder-Scott Company, an independent petroleum
          reservoir engineering company, in its recent Reserve Report dated
          January 14, 1998, prepared on behalf of Seller (hereinafter referred
          to as the "Ryder-Scott Report") using the present value (future net
          income before income taxes discounted at ten percent (10%)) of the
          total proved reserves. If Buyer and Seller are unable to agree on a
          value, the value for a well shall be determined as provided in Section
          11.(a)(ii) using the V/T = PVW/PVC equation for Properties falling in
          Categories A and B as shown on Exhibit E.  This value shall be used in
          determining the value of any interest 

                                       5
<PAGE>

          in a well covered by a preferential right to purchase.  The value 
          shall be determined using the formula as provided in Section 
          11.(a)(iii) for Properties falling in Category C where F=Seller's net
          acres subject to a preferential right to purchase.  To the extent 
          that such an interest is actually sold to a party exercising such a 
          preferential right, it shall be excluded from the transaction 
          contemplated hereby, and the Base Purchase Price shall be reduced by 
          the amount such party paid to Seller for such interest unless the 
          parties hereto agree otherwise.

          (d)    If applicable, as soon as practicable after the execution
          hereof, Buyer shall prepare and submit any necessary filings in
          connection with the transaction contemplated by this Agreement under
          the HSR Act.  Buyer shall pay all filing fees in connection with such
          filing, shall request expedited treatment of such filing by the
          Federal Trade Commission ("FTC"), shall promptly make any appropriate
          or necessary subsequent or supplemental filings, and shall furnish to
          Seller copies of all filings made under the HSR Act at the same time
          they are filed with the FTC.  Seller shall cooperate with Buyer as to
          all filings required by the HSR Act.

          (e)    After both parties have executed this Agreement, Seller shall
          deliver to Buyer a copy of its "pay list" for each well listed on
          Exhibit B (which pay list shall include the name, address, social
          security number, and applicable share of proceeds of production, to
          the extent such information is contained in Seller's records, for each
          party to whom Seller is disbursing proceeds of production with respect
          to such property); and, a list of all parties for whom it is holding
          in suspense proceeds of production. Seller does not represent or
          warrant to Buyer the accuracy of the "pay lists" so delivered.

          (f)    At such time that all Asserted Defects (as hereinafter defined)
          have been fully resolved to the satisfaction of both Parties or if no
          Defects have been asserted by Buyer as of the Defect Notice Date (as
          hereinafter defined)upon Seller's receipt of Buyer's written
          confirmation and assurance that all Defects, if any, have been
          resolved and Buyer is prepared to close the transaction subject only
          to Seller's performance of its closing obligations as set forth in
          Section 14(a), Seller shall give Buyer and its accountants access to
          any and all accounting information in Seller's possession reasonably
          requested by Buyer for the preparation by Buyer, at its sole expense
          and risk, of pro-forma financial statements reflecting the financial
          performance of the Properties for the most recent three (3) calendar
          year(s).  Buyer agrees that none of the information compiled for the
          purpose of this limited audit shall be used for the purpose of due
          diligence by Buyer or otherwise to assert any claim against Seller. 
          Seller shall have no responsibility whatever for the financial
          statements so prepared by Buyer.

     8.   DUE DILIGENCE REVIEWS.

          (a)    The term "Defect" as used in this Section shall mean any of the
          following:

                 (i)  As of the Effective Date, Seller's ownership of a well
                 listed on Exhibit B hereto either, (A) entitles Seller to
                 receive a share of the oil, gas, and other hydrocarbons
                 produced from, or allocated to, such well that is less than the
                 share set forth on Exhibit B for such well in the columns
                 headed "Net Revenue Interest (NRI)" and "Overriding Royalty
                 Interest (ORI)", excepting any decreases caused by an increase
                 in the landowner's royalty payable to the Federal and State
                 Governments or pursuant to contractual obligations, including,
                 without limitation, sliding scale overriding royalties, which
                 are tied to amount of production, or as mandated by Federal and
                 State statutes or as promulgated in the respective Federal and
                 State Rules and Regulations; or, (B) causes Seller to bear a
                 share of the cost of operating such well greater than the share
                 set forth on Exhibit B for such well in the column headed

                                       6
<PAGE>

                 "Working Interest (WI)" (without a proportionate increase in
                 the share of production to which Seller is entitled from such
                 well);

                 (ii)  Seller's ownership of a Property is subject to a lien
                 other than (A) a lien that will be released at or before
                 Closing, (B) a lien for taxes not yet delinquent, or (C) a lien
                 under an operating agreement or similar agreement, to the
                 extent the same relates to expenses incurred that are not yet
                 due;

                 (iii)  Seller's ownership of a Property is subject to a
                 preferential right to purchase, unless a waiver of such right
                 has been obtained with respect to the transaction contemplated
                 hereby or an appropriate tender of the applicable interest has
                 been made to the party holding such right and the period of
                 time required for such party to exercise such right has expired
                 without such party exercising such right;

                 (iv)  Seller's ownership of a Property is subject to an
                 imperfection in title that, if asserted, would cause a Defect,
                 as defined in clause (i) above, to exist, and such imperfection
                 in title normally would not be waived by reasonable and prudent
                 persons engaged in the oil and gas business with knowledge of
                 all the facts and their legal bearing and would materially
                 impair or prevent Buyer from receiving payment from the
                 purchasers of production, and would prevent the economic
                 benefit Buyer could reasonably expect by acquiring the
                 Properties;

                 (v)  Seller's ownership of a non-producing Property is subject
                 to an imperfection in title that, if asserted, would cause
                 Seller's ownership as shown on Exhibit A to be less; and such
                 imperfection in title normally would not be waived by
                 reasonable and prudent persons engaged in the oil and gas
                 business with knowledge of all the facts and their legal
                 bearing and would materially prevent the economic benefit Buyer
                 could reasonably expect by acquiring such Property.

          (b)    Buyer may conduct, to the extent it deems appropriate and at
          its sole risk and cost, such examinations and investigations as it may
          choose with respect to the Properties in order to determine whether
          "Defects" exist.  Unless waived, Buyer shall notify Seller in writing
          of such Defects as soon as they are identified, but no later than ten
          (10) days prior to the date upon which Closing is scheduled to occur
          pursuant to Section 14. [and not as extended pursuant to 14.(i) or
          14.(ii)] (hereinafter "Defect Notice Date").  Those Defects identified
          in such notice to Seller are herein called "Asserted Defects".  Such
          notification shall include a description of the Asserted Defect, the
          lease(s) described on Exhibit A affected by such Asserted Defect, the
          well(s) listed on Exhibit B to which the Asserted Defect relates, and
          all supporting documentation reasonably necessary fully to describe in
          detail the basis for the Asserted Defect; and, for each property,
          lease and applicable well, the size of any variance from "Net Revenue
          Interest (NRI)", "Overriding Royalty Interest (ORI)", or "Working
          Interest (WI)" set forth in Exhibit B that does or could result from
          such Asserted Defect.  Buyer hereby waives all Defects that it fails
          to identify to Seller as Asserted Defects on or before the Defect
          Notice Date.  If Buyer timely notifies Seller of Asserted Defects,
          Seller (i) shall have the right (but not the obligation) to attempt to
          cure such Asserted Defects prior to Closing, and (ii) shall also have
          the right (which may be exercised at any time before the Closing Date)
          to postpone the Closing by designating a new Closing Date not later
          than thirty (30) days after the Closing Date then existing, if Seller
          desires additional time to attempt to cure (including determining if
          it will attempt to cure) one or more Asserted Defects. In lieu of
          curing or attempting to cure an Asserted Defect, Seller may elect, at
          any time prior to Closing with respect to any Asserted Defect, to
          indemnify and hold Buyer harmless from and against any actual damages
          or loss (but specifically excluding consequential damages, special
          damages, or similar damages) Buyer may 

                                       7
<PAGE>

          suffer as a result of a third party claim based on such Asserted 
          Defect; provided, unless Buyer consents, Seller may not so elect to 
          indemnify Buyer in lieu of curing such Asserted Defect(s) if the 
          amount attributable to such Asserted Defect(s) exceeds One Million 
          Dollars($1,000,000.00).  If Seller elects to indemnify Buyer as to an 
          Asserted Defect, such Asserted Defect will be treated under this 
          Agreement as cured and, as to such indemnified Asserted Defect, 
          SELLER SHALL RELEASE, INDEMNIFY, DEFEND, AND HOLD HARMLESS BUYER FROM 
          AND AGAINST ANY AND ALL LOSS, COST, DAMAGE, EXPENSE, OR LIABILITY 
          WHATSOEVER, INCLUDING ATTORNEYS' FEES, ARISING OUT OF THE ASSERTED 
          DEFECT SELLER HAS ELECTED TO INDEMNIFY (EXCEPT ANY CAUSED SOLELY BY 
          THE GROSS NEGLIGENCE OR WILLFUL MISCONDUCT OF BUYER).

          (c)    Buyer shall have the right to make an environmental assessment
          of the Properties during the period beginning on the date of execution
          of this Agreement and ending on the Defect Notice Date.  Subject to
          the provisions regarding Buyer's rights to access under Section 7
          hereof, Buyer and its agents shall have the right to enter upon the
          Properties and all buildings and improvements thereon, inspect the
          same, conduct soil and water tests and borings, and generally conduct
          such tests, examinations, investigations, and studies as Buyer may
          deem necessary or appropriate for the preparation of appropriate
          engineering and other reports in relation to the Properties and their
          physical and environmental condition. If Buyer proposes to undertake
          an environmental assessment, Buyer's proposed plan, the consultants to
          be used, and testing protocol must be approved by Seller before the
          work may begin.  Buyer agrees promptly to provide to Seller a copy of
          the environmental assessment, including any reports, data, and
          conclusions. Buyer shall keep all data and information acquired by
          such examinations and the results of all analyses of such data and
          information strictly confidential and shall not disclose same to any
          person or agency without the prior written approval of Seller. BUYER
          SHALL RELEASE, INDEMNIFY, DEFEND, AND HOLD HARMLESS THE SELLER GROUP
          FROM AND AGAINST ANY AND ALL LOSS, COST, DAMAGE, EXPENSE, OR LIABILITY
          WHATSOEVER, INCLUDING ATTORNEYS' FEES, ARISING OUT OF ANY
          ENVIRONMENTAL ASSESSMENT INCLUDING, BUT NOT LIMITED TO, INJURY TO OR
          DEATH OF PERSONS OR DAMAGE TO PROPERTY OCCURRING IN, ON, OR ABOUT THE
          PROPERTIES AS A RESULT OF SUCH ACTIVITIES (EXCEPT ANY SUCH INJURIES OR
          DAMAGES CAUSED SOLELY BY THE GROSS NEGLIGENCE OR WILLFUL MISCONDUCT OF
          ANY MEMBER OF THE SELLER GROUP).

          (d)    After the Defect Notice Date, Buyer shall be deemed to have
          inspected the Properties or waived its right to inspect the Properties
          for all purposes and satisfied itself as to their physical and
          environmental condition, both surface and subsurface.

     9.   ADVERSE ENVIRONMENTAL CONDITIONS.

          Seller represents to Buyer that to the best of its knowledge there are
          no environmental conditions, as hereinafter defined, existing as of
          the date hereof which Seller has not disclosed to Buyer.  Seller will
          advise Buyer of any Condition that Seller becomes aware of from the
          date hereof to the Closing Date.

          (a)    Buyer shall have until the Defect Notice Date to notify Seller
          of any material adverse environmental condition of the Properties
          which Buyer deems unacceptable and provide evidence of the condition
          to Seller.  An environmental condition is a material adverse
          environmental condition ("Condition") only if the following criteria
          are met:

                                       8
<PAGE>

                 (i)  The environmental condition would have been required to be
                 remediated on the Effective Date under the Environmental Laws;
                 and,

                 (ii) The total cost to remediate all environmental conditions
                 identified by Buyer affecting the Properties to the state
                 required by the Environmental Laws is reasonably estimated to
                 be at least $100,000.00.

          (b)    "Environmental Law" shall mean any federal, state, or local
          law, rule, regulation, order, or ordinance in effect as of the
          Effective Date of this Agreement pertaining to protecting the public
          health, welfare, and the environment.

          (c)    At Closing, Seller may elect any of the following provided a
          Condition exists:

                 (i)   Decrease the Purchase Price by a mutually acceptable
                 amount reflecting Seller's proportionate share, based on its
                 working interest, of the cost reasonably estimated to remediate
                 a Condition affecting the Properties to such a state as
                 required by the Environmental Laws;

                 (ii)  Remove the affected Properties from this Agreement and
                 adjust the Base Purchase Price by an amount mutually agreed to
                 by Seller and Buyer. If Buyer and Seller are unable to agree on
                 an amount, the value of Properties falling in Categories A and
                 B shall be determined as provided in Section 11.(a)(ii) using
                 the V/T = PVW/PVC equation and an appropriate adjustment will
                 be made using this value. The value of all affected Properties
                 falling in Category C shall be determined using the formula in
                 Section 11.(a)(iii) where F=Seller's net acres affected by the
                 Condition.

                 (iii) Remedy, or, if applicable, agree to indemnify, Buyer in
                 accordance with Section 8(b); the Condition, as provided below.

          (d)    If option (c)(i) above is chosen, Buyer shall be responsible
          for any remediation and if the actual cost to remediate a Condition
          exceeds the amount of the estimate, Buyer shall pay the additional
          costs to remediate the Condition as required by applicable law.

          (e)    If option (c.) (iii). above is chosen, the following shall
          govern the remediation:

                 (i)   Seller shall be responsible for all negotiations and
                 contacts with federal, state, and local agencies and
                 authorities with regard to the Condition or remediation. Buyer
                 shall not make any independent contacts with any agency,
                 authority, or other third party with respect to the Condition
                 or remediation and will keep all information regarding the
                 Condition and remediation confidential, except in each instance
                 to the extent required by applicable law.

                 (ii)  Seller shall remediate the Condition to the state agreed
                 upon by Seller and Buyer, but in no event will Seller be
                 required to remediate the Condition beyond the state required
                 by the Environmental Laws.

                 (iii) Buyer will grant and warrant access to the affected
                 Properties after Closing to Seller and third parties conducting
                 assessments or remediation, to the extent and as long as
                 necessary to conduct and complete the assessment or remediation
                 work, to remove equipment and facilities, and to perform any
                 other activities reasonably necessary in connection with
                 assessment or remediation.

                 (iv)  Buyer will use its best efforts not to interfere with
                 Seller's ingress and egress or assessment or remediation
                 activities.  Seller shall make reasonable 

                                       9
<PAGE>

                 efforts to perform the work so as to minimize disruption to 
                 Buyer's business activities and to the Properties.

                 (v)  Seller shall continue remediation of the Condition until
                 the first of the following occurs:

                        (1)  The appropriate governmental authorities provide
                        written notice to Seller or Buyer that no further
                        remediation of the Condition is required;

                        (2)  The parties agree that the Condition has been
                        remediated to the state required by the Environmental
                        Laws or as agreed by the parties.

                        Upon the occurrence of either (1) or (2) above, Seller
                        shall notify Buyer that remediation of the Condition is
                        complete and provide a copy of the notification
                        described in (1) above, if applicable.  Upon delivery of
                        Seller's notice, Seller shall be released from all
                        liability and have no further obligations under any
                        provisions of this Agreement in connection with a
                        Condition.

                 (vi)  Until Seller completes remediation of a Condition, Seller
                 and Buyer will each notify the other of any pending or
                 threatened claim, action, or proceeding by any authority or
                 private party that relates to or would affect the environmental
                 condition, the assessment, or the remediation of the affected
                 Properties.

                 (vii) After Buyer takes over as operator, and before Seller
                 has completed remediation of a Condition, if a leak, spill, or
                 discharge of any material or substance ("Occurrence") occurs on
                 the affected Properties, or any part of them, Buyer will
                 promptly notify Seller and act promptly to minimize the effects
                 of the Occurrence.  If a spill, leak, or discharge occurs and
                 Seller determines that it may affect the area where Seller is
                 conducting remediation or assessment, Buyer will hire a
                 consultant (who must be acceptable to Seller) to assess the
                 effect of the Occurrence on the environmental condition of the
                 affected Properties, and the cost of Seller's remediation work
                 and the cost of the additional work required as the result of
                 the Occurrence.  Unless the Occurrence was caused solely by
                 Seller, Buyer will be responsible for the incremental cost of
                 remediating the impact of the Occurrence.  If Seller's
                 remediation is expanded to incorporate remediation of the
                 Occurrence, Buyer will promptly pay its share of costs and
                 expenses to Seller as the work is performed, within thirty (30)
                 days of receipt of invoices for the work (with supporting
                 documentation).  Payments not made timely will bear interest at
                 a rate of twelve percent (12%) per annum or the maximum lawful
                 rate, whichever is less, compounded daily from the date of
                 Buyer's receipt of the invoice until paid.

                 If the cost of the additional work equals or exceeds the cost
                 to complete the remediation which would have been incurred but
                 for the Occurrence, Seller will pay Buyer the cost that would
                 have been incurred by Seller to complete the remediation but
                 for the Occurrence.  As consideration for this payment, Buyer
                 will accept the environmental condition of the affected
                 Properties as they exist on the date of the payment, assume
                 full responsibility for remediating the affected Properties and
                 related off-site contamination in accordance with this
                 Agreement, and agrees to release, not to sue, indemnify, hold
                 harmless, and defend Seller as to claims and liabilities
                 arising from the Occurrence to the same extent as described in
                 Sections 17., 18., and 20.

                                       10
<PAGE>

                 (viii)  If Seller undertakes remediation as to any Properties
                 in which Seller's ownership was less than 100%, and provided
                 that the expense(s) incurred by Seller in such remediation are
                 fair and reasonable, Buyer will bill the other working interest
                 owners for their share of the remediation expenses.  Regardless
                 of whether Buyer recoups any amount from the other working
                 interest owners, Buyer will refund to Seller, within sixty (60)
                 days of each Seller invoice, with documentation, any amounts
                 expended by Seller over the amount attributable to Seller's
                 former working interest share.

                 (ix)    If Seller will assess or remediate the affected
                 Properties after Closing, the Assignment and Bill of Sale or
                 other recordable instrument will restate the rights and
                 obligations of this section.

     10.  DISPOSAL OF MATERIALS, SUBSTANCES, AND WASTES; COMPLIANCE WITH LAW. 
Buyer will store, handle, transport, and dispose of or discharge all 
materials, substances, and wastes from the Properties (including produced 
water, drilling fluids, NORM, and other wastes), whether present before or 
after the Effective Date, in accordance with applicable local, state, and 
federal laws and regulations.  Buyer will keep records of the types, amounts, 
and location of materials, substances, and wastes that are stored, 
transported, handled, discharged, released, or disposed of onsite and 
offsite.  When any lease terminates, an interest in which has been assigned 
under this Agreement, Buyer will undertake additional testing, assessment, 
closure, reporting, or remedial action with respect to the Properties 
affected by the termination as is necessary to satisfy all local, state, or 
federal requirements in effect at that time and necessary to restore the 
Properties. Buyer shall assume full responsibility for the operations 
conducted pursuant to this Section 10. and agrees to release, not to sue, 
indemnify, hold harmless, and defend Seller as to all claims and liabilities 
arising therefrom to the same extent as described in Sections 17., 18., and 
20.

     11.  CERTAIN PRICE ADJUSTMENTS TO THE BASE PURCHASE PRICE.

          (a)    If Buyer presents Asserted Defects to Seller as a part of the
          due diligence reviews provided for in Section 8. above, and if Seller
          is unable or unwilling to cure such Asserted Defects prior to Closing,
          or if Buyer has elected to treat a Property affected by a casualty
          loss pursuant to Section 22. as if it were a Property affected by an
          Asserted Defect, then an appropriate adjustment to the Base Purchase
          Price to account for such Asserted Defects shall be made as follows:

                 (i)  Buyer and Seller shall attempt to agree upon an
                 appropriate adjustment to the Base Purchase Price to account
                 for an Asserted Defect which Seller either is unable or
                 unwilling to cure prior to Closing, and those Properties, or
                 any part thereof, associated with the Asserted Defect shall be
                 excluded from this Agreement and any rights of Buyer hereunder
                 to such Properties shall terminate.

                 (ii) If Buyer and Seller are unable to agree upon an
                 appropriate adjustment with respect to an Asserted Defect which
                 affects Seller's interest in any Property falling in either
                 Category A or B as shown on Exhibit E, adjustments shall be
                 made as follows:

                 Determine the value of all wells contained in the Unit in which
                 the Property affected by the Asserted Defect falls by using the
                 following equation and solve for V. "Unit" as used herein shall
                 mean a drilling and spacing unit as determined by order or rule
                 of the Wyoming Oil & Gas Conservation Commission or as
                 otherwise permitted by law, or the Participating Area affected
                 by the Asserted Defect.

                        V/T = PVW/PVC

                                       11
<PAGE>

                        T = Total amount ($) allocated to category containing
                 Unit as shown on Exhibit E.

                        PVW = BFIT PV @ 10% (Future net income before income
                 taxes discounted at ten percent (10%)) of total proved reserves
                 in all wells in Unit as contained in the Ryder-Scott Report.

                        PVC = BFIT PV @ 10% (Future net income before income
                 taxes discounted at ten percent (10%)) of total proved reserves
                 in all wells in Category as contained in the Ryder-Scott
                 Report.

                 The Base Purchase Price shall be adjusted by the absolute value
                 of an amount using the following formula:

                        Adjustment = V X (1-[B/C])

                        V = Value of wells as determined above.

                        B = Correct net revenue interest for all wells in Unit
                 including any overriding royalty interest.

                        C = Net revenue interest, including any overriding
                 royalty interest, as shown on Exhibit B in all wells in Unit.

                 (iii)  If an Asserted Defect affects Seller's interest in any
                 Property falling in Category C and Buyer and Seller cannot
                 mutually agree on an appropriate adjustment to the Base
                 Purchase Price, adjustments shall be made using the following
                 formula:

                        Adjustment = T X F/25,000

                        T = Total amount ($) allocated to Category C as shown on
                 Exhibit E.

                        F = Seller's net acres affected by uncured Asserted
                 Defect.

          (b)    If it is determined that Seller's interest in a well listed on
          Exhibit B is greater or lesser than the interest shown for such well
          under the columns headed "Net Revenue Interest (NRI)" and "Overriding
          Royalty Interest (ORI)" on Exhibit B, then Seller or Buyer may propose
          an increase or decrease, as applicable, in the Base Purchase Price, in
          which case such increase or decrease shall be handled in the same
          manner as provided above with respect to adjustments for Asserted
          Defects; provided that the party making such determination shall
          notify the other party of such adjustment on or before the Defect
          Notice Date.  Buyer shall have an affirmative obligation to disclose
          to Seller circumstances discovered by Buyer in its due diligence
          review that could result in an increase in the Base Purchase Price
          hereunder.  No increase in the Base Purchase Price will result from
          any royalty reduction resulting under the Federal Royalty Reduction
          Program.

          (c)    Notwithstanding the adjustments to be made pursuant to
          subsections 11.(a) and 11.(b) above, if such adjustments do not exceed
          $250,000 in the aggregate, no such adjustments shall be made and none
          of the Properties that would otherwise have been excluded pursuant to
          subsection 11.(a) above shall be excluded.  If the adjustments to be
          made pursuant to subsections 11.(a) and 11.(b) above, do exceed
          $250,000.00, the Base Purchase Price shall be adjusted according
          thereto.

     12.  CONDITIONS PRECEDENT TO BUYER'S OBLIGATIONS.  Buyer's obligations 
at Closing under this Agreement are subject to each of the following 
conditions:

                                       12
<PAGE>

          (a)    Seller's representations under this Agreement shall be true and
          accurate in all material respects as of the date when made and at
          Closing, except as to changes specifically contemplated by this
          Agreement or consented to by Buyer in writing.

          (b)    Seller shall have performed and complied in all material
          respects with every covenant, agreement, and condition required by it
          under this Agreement prior to or at the Closing unless performance or
          compliance therewith shall have been waived by Buyer in writing.

          (c)    If applicable, Buyer and Seller shall have received approval
          from the FTC under the HSR Act of the transaction contemplated by this
          Agreement, or shall have received notification that the waiting period
          under such act has been terminated, or the waiting period under such
          act shall have expired.

          (d)    The Base Purchase Price increase or decrease resulting from the
          adjustments to be made pursuant to subsections 11.(a) and 11.(b) does
          not exceed twenty percent (20%) of the Base Purchase Price.

          (e)    On the Closing Date, no material suit, action, or other
          proceeding against Buyer shall be pending before any court or
          governmental agency seeking to restrain, prohibit, or obtain damages
          or other relief in connection with the consummation of the transaction
          contemplated by this Agreement.

If any such condition precedent to the obligations of Buyer under this 
Agreement is not met as of the Closing Date, and if Buyer is not in material 
breach of its obligations hereunder, this Agreement may be terminated at the 
option of Buyer. If Buyer thus terminates this Agreement, the Deposit shall 
be returned to Buyer and the parties shall have no further obligations to one 
another hereunder (other than the indemnifications contained in Sections 
7.(a)(iii), 8.(c), and 21. hereof, which shall survive such termination).  
Notwithstanding the foregoing, if a condition set forth above, other than 
condition 12. (c) or 12.(d), is not met (and is asserted by Buyer as a 
failure of one of its conditions of Closing), and if the reasons such 
condition is not met relate only to some, but not all, of the Properties, 
failure of such condition to be met may, at the option of either Buyer or 
Seller, be treated as an uncured Asserted Defect and handled in accordance 
with the process set forth in Section 11. above.

     13.  CONDITIONS PRECEDENT TO SELLER'S OBLIGATIONS.  Seller's obligations 
at Closing under this Agreement are subject to each of the following 
conditions:

          (a)    Buyer's representations under this Agreement shall be true and
          accurate in all material respects as of the date when made and at
          Closing, except as to changes specifically contemplated by this
          Agreement or consented to by Seller.

          (b)    Buyer shall have performed and complied in all material
          respects with every covenant, agreement, and condition required by it
          under this Agreement prior to or at the Closing unless compliance
          therewith shall have been waived by Seller.

          (c)    If applicable, Buyer and Seller shall have received approval
          from the FTC under the HSR Act of the transaction contemplated by this
          Agreement, or shall have received notification that the waiting period
          under such act has been terminated, or the waiting period under such
          act shall have expired.

          (d)    The Base Purchase Price reduction or increase resulting from
          the adjustments to be made pursuant to subsections 11.(a) and 11.(b)
          does not exceed twenty percent (20%) of the Base Purchase Price.

          (e)    On the Closing Date, no material suit, action, or other
          proceeding against Seller shall be pending before any court or
          governmental agency seeking to restrain, 

                                       13
<PAGE>

          prohibit, or obtain damages or other relief in connection with the 
          consummation of the transaction contemplated by this Agreement.

If any such condition precedent to the obligations of Seller under this 
Agreement is not met as of the Closing Date, this Agreement may be terminated 
at the option of Seller.  If Seller terminates this Agreement because of 
Buyer's failure to fulfill condition 13.(a) or 13.(b), the Deposit shall not 
be returned to Buyer.  If Seller terminates this Agreement because of 
conditions 13.(c), 13.(d), or 13.(e), and Buyer is not in material default 
under this Agreement, the Deposit shall be returned to Buyer.  Thereafter, 
Seller and Buyer shall have no further obligations to one another hereunder 
(other than the indemnifications contained in Section 7.(a)(iii), 8.(c), and 
21. hereof, which shall survive such termination).

     14.  THE CLOSING.  If the conditions referred to in Section 12. of this 
Agreement (the "Conditions Precedent to Buyer's Obligations") and Section 13. 
of this Agreement (the "Conditions Precedent to Sellers Obligations") have 
been satisfied or waived, the consummation of the transaction contemplated 
hereby ("Closing") shall take place in the offices of Seller, at 201 Main 
Street, Fort Worth, Texas 76102, on May 14, 1998, at 10:00 a.m. Central 
Standard Time, or at such other date and time (i) as the Buyer and Seller may 
agree or, (ii) to which Seller may postpone the Closing pursuant to Section 
8.(b) hereof (such date and time herein called the "Closing Date"). It is 
provided however, that Seller shall not be permitted to extend the Closing 
Date pursuant to Section 8(b) beyond July 14, 1998, unless Buyer consents.  
At the Closing:

          (a)    Seller shall:

                 (i)    Execute, acknowledge, and deliver to Buyer a conveyance 
                 of the Properties (the "Assignment and Bill of Sale"), which 
                 shall include a warranty of title as against claims arising by
                 through or under Seller, and not otherwise, and in the form
                 attached hereto as Exhibit C (with Exhibits A and B attached
                 thereto), effective as of seven o'clock a.m., (7:00 a.m.)
                 Mountain Standard Time on June 1, 1998, (herein called the
                 "Effective Date");

                 (ii)   Execute (and, where required, acknowledge) and deliver 
                 to Buyer forms of conveyance or assignment as required by the
                 applicable authorities for transfers of interests in state or
                 federal leases included in the Properties;

                 (iii)  Execute and deliver to Buyer letters in lieu of transfer
                 orders (or similar documentation), in form acceptable to both
                 parties;

                 (iv)   If Buyer requests, deliver to Buyer an affidavit or 
                 other certification (as permitted by the Internal Revenue Code 
                 of 1986, as amended) that Seller is not a "foreign person" 
                 within the meaning of Section 1445 (or similar provisions) of 
                 such code (i.e., Seller is not a non-resident alien, foreign
                 corporation, foreign partnership, foreign trust, or foreign
                 estate, as those terms are defined in such code and regulations
                 promulgated thereunder);

                 (v)    With respect to Properties operated by Seller and to the
                 extent available, deliver to Buyer all requisite consents of
                 non-operators under any operating agreement naming Buyer as
                 successor operator; and copies of such requests for consent
                 which were sent but not obtained prior to Closing;

                 (vi)   Deliver to Buyer resignations of operator and/or Changes
                 of Operator/Owner Forms properly executed on behalf of Seller
                 for all Seller-operated wells acquired by Buyer; and, any other
                 forms required by governmental authorities having jurisdiction
                 which must be initiated by Seller to change the operator from
                 Seller to Buyer as of the Effective Date; and,

                                       14
<PAGE>

                 (vii)  Certificates in form and substance satisfactory to
                 Seller, effective as of the Closing Date and executed by
                 Seller's duly authorized officer, partner, or owner, as
                 appropriate, to the effect that (1) Seller has all requisite
                 corporate, partnership, or other power and authority to sell
                 the Properties on the terms of this Agreement and to perform
                 its other obligations under this Agreement and has fulfilled
                 all corporate, partnership, or other prerequisites to closing
                 this transaction, and (2) each individual executing the closing
                 documents has the authority to act on behalf of Seller.

                 (viii) Deliver possession of the Properties to Buyer as of the
                 Effective Date.

          (b)    Buyer shall:

                 (i)  Deliver to Seller, by wire transfer to an account
                 designated by Seller in a bank located in the United States, an
                 amount payable in United States dollars equal to the amount as
                 set forth on the Closing Settlement Statement as provided for
                 in Section 16.(c) below;

                 (ii)  Deliver to Seller, except to the extent waived by Seller:

          (A)    Evidence of compliance with the requirements of all laws,
          rules, and regulations relating to the transfer of operatorship from
          Seller to Buyer;

          (B)    Evidence of Buyer's bond coverage as required by all laws,
          rules, and regulations, or that a cash deposit, certificate of
          deposit, letter of credit, or some other permitted financial security
          has been accepted by the proper regulatory agency for each well
          requiring such coverage;

          (C)    Evidence of compliance with the requirements of all laws,
          rules, and regulations that Buyer is qualified to succeed to Seller's
          interest in the Properties; and,

          (D)    Certificates in form and substance satisfactory to Seller,
          effective as of the Closing Date and executed by Buyer's duly
          authorized officer, partner, or owner, as appropriate, to the effect
          that (1) Buyer has all requisite corporate, partnership, or other
          power and authority to purchase the Properties on the terms of this
          Agreement and to perform its other obligations under this Agreement
          and has fulfilled all corporate, partnership, or other prerequisites
          to closing this transaction, and (2) each individual executing the
          closing documents has the authority to act on behalf of Buyer.

          (iii) Execute such forms and take such other steps as Seller may
          reasonably require to (A) succeed Seller with respect to the
          Properties under the rules and regulations of applicable authorities
          and (B) assume any and all liabilities of Seller with respect to the
          wells described on Exhibit B; and,

          (iv)  Take possession of the Properties.

     15.  AFTER CLOSING.  Within thirty (30) days after Closing, Seller shall 
make available for delivery to Buyer at Seller's offices all of Seller's 
lease files, abstracts and title opinions, division order files, production 
records, well files, copies of accounting records (but not including general 
financial accounting or tax accounting records), and other similar files and 
records that directly relate to the Properties.  Notwithstanding the 
foregoing, Seller shall not be required to deliver to Buyer materials that 
Seller considers proprietary or confidential or that Seller legally cannot 
provide to Buyer without breaching, or risking a breach of, confidentiality 
agreements with other parties.  It is expressly understood that Buyer is not 
entitled to acquire any records except as expressly provided in Section 1. 
hereof.  Seller may retain such files, or copies thereof, or such information 
as it deems necessary for all purposes, including but not limited to, 
preparing a Final Settlement Statement as 

                                       15
<PAGE>

provided in Section 16., or for purposes of filing tax returns covering the 
Properties.  Any files or materials retained by Seller after Closing pursuant 
hereto, shall be sent to Buyer as soon as reasonably practicable after final 
payment is made in accordance with the Final Settlement Statement.  Seller 
may, at its own expense, have access to and make copies of all, or any part 
thereof, of the files and records provided Buyer hereunder at reasonable 
times and upon reasonable notice during regular business hours for as long as 
the Properties remain in effect.

As to those wells which Seller is disbursing proceeds of production, Seller 
shall continue to collect proceeds of production as long as it remains 
operator and shall be responsible for making disbursements, in accordance 
with its normal procedures (and at normal times), of such proceeds of 
production so collected to the parties entitled to same, with any proceeds of 
production thereafter collected by Seller to be forwarded promptly to its 
successor as operator.

Provided Buyer succeeds Seller as operator, Buyer shall become responsible 
for all disbursements of proceeds of production and such disbursement 
activities shall be included in the matters that Buyer assumes and with 
respect to which Buyer indemnifies Seller under Section 17 below.

SELLER GIVES NO ASSURANCE HEREUNDER THAT BUYER SHALL SUCCEED SELLER AS 
OPERATOR OF ANY PROPERTY WHERE PARTIES OTHER THAN SELLER OWN INTERESTS IN 
SUCH PROPERTY. It is understood that in most (if not all) of the operating 
agreements affecting the Properties, Seller does not have the right to 
transfer operations of the leasehold interests subject thereto to Buyer.  
However, Seller shall use its best efforts to secure consent from all 
non-operators naming Buyer as Operator under such operating agreements prior 
to Closing, to be effective on the Closing Date and provided Closing takes 
place. After Closing, Buyer shall use its best efforts to comply with the 
terms of any operating agreements to name a successor operator thereunder for 
which Seller was unable to obtain prior to Closing. Upon obtaining consent 
from non-operators naming Buyer as successor operator, Seller and Buyer 
promptly shall file all forms required by any governmental agency having 
authority, to change the operator from Seller to Buyer.

Seller shall operate the Seller-operated Properties until the Effective Date 
and thereafter, if necessary, until such time as provided under the 
applicable operating agreement, plan of unitization, or law requires.  As 
soon as practicable thereafter, operations shall be turned over to, and 
become the responsibility of, Seller's successor as Operator To the extent 
Seller so operates any Property after the Effective Date, its obligations to 
Buyer with respect to such operations shall be no greater than those that it 
would have to a non-operator under the applicable operating agreement.  In 
the absence of an operating agreement, those terms and provisions contained 
in the AAPL 610 (1382 Revision) form Operating Agreement shall apply.  THE 
PARTIES RECOGNIZE THAT, UNDER SUCH AGREEMENTS AND SUCH FORM OF AGREEMENT, THE 
OPERATOR IS NOT RESPONSIBLE TO THE OTHER PARTIES THERETO FOR ITS OWN 
NEGLIGENCE AND HAS NO RESPONSIBILITY TO SUCH OTHER PARTIES OTHER THAN FOR 
GROSS NEGLIGENCE OR WILLFUL MISCONDUCT.

As to all wells acquired by Buyer hereunder which Seller continues to operate 
on behalf of Buyer and for Buyer's account after the Effective Date because a 
successor operator has not been approved by the requisite governmental 
authority, or consent of non-operators has not been obtained, by mutual 
agreement or otherwise, Seller will be paid the producing well overhead rates 
shown in the operating agreement applicable to such wells and if there is no 
such established rate, Buyer shall pay Seller for its proportionate share 
thereof based upon the rate of five hundred dollars ($500.00) per month, or 
any part thereof, for each well.

     16.  CERTAIN ACCOUNTING ADJUSTMENTS TO THE PURCHASE PRICE.

          (a)    Appropriate adjustments to the Purchase Price shall be made
          between Buyer and Seller to reflect the following:

                 (i)  All rights to proceeds, receipts, reimbursements, credits,
                 and income attributable to the Properties and accruing before
                 the Effective Time, as 

                                       16
<PAGE>

                 defined below, shall be the property of Seller.  All proceeds, 
                 receipts, credits, income, and charges attributable to the 
                 Properties acquired by Buyer hereunder and accruing on and 
                 after the Effective Time shall be the property of Buyer.  As 
                 to Properties operated by Seller and purchased by Buyer 
                 hereunder and concerning accounts held in suspense, Seller 
                 will pay in full the royalty accounts that were suspended 
                 because the amount due is less than the statutory or 
                 contractual minimum for payment.  As to all other suspended
                 accounts, if any, Seller shall transfer to its successor as
                 operator all monies held in a suspended account which were
                 received for production produced from or allocated to the
                 Properties on and after the Effective Time.  As to proceeds
                 received for production produced from or allocated to the
                 Properties before the Effective Time and held in a suspense
                 account at Buyer's option, Seller may either: 1) Retain the
                 suspended amounts after Closing and, upon proof satisfactory to
                 Seller, release the money to the proper party; or, 2) Transfer
                 the suspended amounts to Buyer for future disbursement.  Once
                 suspended amounts have been transferred to Buyer for future
                 disbursement, Buyer agrees to be responsible for disbursing the
                 suspended monies to the proper parties and shall release,
                 indemnify, defend, and hold harmless the Seller Group from any
                 and all claims, actions, causes of action, liabilities,
                 damages, losses, costs, or expenses (including, without
                 limitation, court costs and attorneys' fees), arising out of or
                 in any way connected with making such disbursements, or failure
                 to make a disbursement.

                 (ii)  Seller shall be responsible for and pay (A) all charges
                 and invoices for costs and expenses (including, without
                 limitation, lease maintenance payments, drilling and operating
                 expenses, capital expenditures, and overhead charges) accruing
                 before the Effective Time and attributable to the Properties
                 and (B) necessary royalty disbursements of proceeds realized
                 from the sale of production produced from and allocated to the
                 Properties before the Effective Time.  Buyer shall be
                 responsible for payment of (C) all charges and invoices for
                 costs and expenses (including, without limitation, lease
                 maintenance payments, drilling and operating expenses, capital
                 expenditures, and overhead charges) accruing on and after the
                 Effective Time and attributable to the Properties acquired
                 hereunder and (D) necessary royalty disbursements of proceeds
                 realized from the sale of production produced from and
                 allocated to the Properties acquired hereunder on and after the
                 Effective Time.  All payments made by Seller for items under
                 (C) above for which Buyer is responsible shall be reimbursed by
                 Buyer.  Seller shall reimburse Buyer for all monies received by
                 Seller from non-operators as payment of Seller's invoices for
                 the operations of the wells described on Exhibit B for periods
                 on and after the Effective Time.

                 (iii) Seller will be credited with an amount equal to the
                 simple interest accrued on the Adjusted Purchase Price for the
                 period beginning with the Closing Date and continuing through
                 the Effective Date at seven percent (7%) simple annual interest
                 calculated as follows:

                        INTEREST = Adjusted Purchase Price x number of days from
                        closing to Effective Date x 7% divided by 365;

                 The amount of interest credited to the Buyer will not exceed  
                 $250,000.00 regardless of the above calculation, and further
                 such credit shall be only be applied if Closing occurs before
                 the Effective Date.

          (b)    In making such adjustments, the Parties agree that:

                 (i) Seller will cause such oil storage facilities which store
                 oil produced from the Properties to be gauged or strapped as of
                 7:00 a.m. Mountain Standard 

                                       17
<PAGE>

                 Time on the Effective Date, herein also referred to as the 
                 Effective Time.  Seller also has caused the gas production 
                 meter charts (or if such do not exist, the sales meter charts) 
                 on the pipelines transporting gas production from the 
                 Properties to be read as of the Effective Time. The results of 
                 such gauging, strapping, or chart reading are conclusive and 
                 shall be made available to Buyer.  The production in such 
                 storage facilities or through such meters on the gas pipelines 
                 as of the Effective Time shall be owned by Seller; and, 
                 thereafter, production placed in such oil storage facilities 
                 and gas production passing through the aforesaid meters on the 
                 pipelines shall be owned by Buyer, insofar as to the interests 
                 subject hereto as of Closing.

                 (ii)  All ad valorem, severance, production and similar taxes
                 applicable to the Properties shall be prorated between Seller
                 and Buyer as of the Effective Date.  Therefore, all such taxes
                 for 1997 and prior years and for the portion of 1998 prior to
                 the Effective Date levied against the Properties shall be borne
                 and paid by Seller; and, all ad valorem and similar taxes for
                 the remainder of 1998 and thereafter levied against the
                 Properties shall be borne and paid by Buyer, irrespective if
                 the amount levied is based on the previous year's production or
                 any other basis.

                 (iii) Where Seller owns one-hundred percent (100%) of the
                 working interest under a well and there is no overhead charge
                 for determining the overhead expense to be charged to Buyer on
                 and after the Effective Date, the overhead charge shall be
                 deemed to be five hundred dollars ($500.00) per month, or any
                 part thereof, per well.

                 (iv)  Each party shall be responsible for its own income taxes.

          (c)    With respect to matters that can be determined as of Closing,
          Seller shall prepare, in accordance with the provisions of this
          Agreement and with generally accepted accounting principles, a
          statement (the "Closing Settlement Statement") setting forth each
          adjustment to the Base Purchase Price to the best of Seller's
          knowledge, whether upward or downward, as may be required in
          accordance herewith.  Seller shall submit to Buyer the Closing
          Settlement Statement no later than five (5) days prior to the Closing
          Date and shall afford Buyer access to Seller's records pertaining to
          the computation of the Closing Settlement Statement. Prior to the
          Closing, Buyer and Seller will agree upon the adjustments stated
          therein to be made to the Purchase Price, or will specify the
          adjustments to which there are differences and the adjustments to be
          omitted therefrom.  Only the agreed upon adjustments shall be taken
          into account in computing the adjustments to be made to the Purchase
          Price at Closing.  Final adjustments to the Purchase Price to be made
          hereunder shall be made within one hundred-twenty (120) days after the
          Closing Date for all matters other than Asserted Defects according to
          (d) hereinbelow as follows:

          (d)    As soon as practicable after the Closing, and in no event later
          than sixty (60) days following the Closing Date, Seller shall deliver
          to Buyer, in accordance with the provisions of this Agreement and with
          generally accepted accounting principles, a statement ("Final
          Settlement Statement") setting forth each adjustment under this
          Agreement which was not determined as of the Closing.  Within sixty
          (60) days after Buyer's receiving the Final Settlement Statement, the
          Parties shall agree upon the adjustments and payments stated in such
          Final Settlement Statement, and the net of such adjustments and
          payments shall be paid in cash to the appropriate Party by the other
          Party within five (5) days following agreement as to the Final
          Settlement Statement.  If the Parties fail to reach agreement as to
          all adjustment within said sixty (60) day period, the net amount of
          all undisputed adjustments shall be paid and any remaining disputed
          items shall be submitted for determination by a nationally 

                                       18
<PAGE>

          recognized firm of public accountants selected by the parties, whose 
          decision shall be final and binding.  The parties shall share equally 
          the costs of such determination.

     17.  ASSUMPTION AND INDEMNIFICATION. UPON DELIVERY TO AND ACCEPTANCE BY 
BUYER OF THE ASSIGNMENT AND BILL OF SALE, BUYER SHALL BE DEEMED TO HAVE 
ASSUMED, TO PAY AND PERFORM TIMELY, ALL DUTIES, EXPENSES, OBLIGATIONS, 
LOSSES, HAZARDS AND LIABILITIES RELATING TO THE OWNERSHIP OR OPERATION OF THE 
PROPERTIES ARISING ON AND AFTER THE EFFECTIVE DATE (INCLUDING, WITHOUT 
LIMITATION, THOSE ARISING UNDER OR BY VIRTUE OF ANY LEASE, CONTRACT, 
AGREEMENTS, DOCUMENT, PERMIT OR RULE, OR DELAY IN OBTAINING APPROVAL OF 
FEDERAL OR STATE ASSIGNMENTS); AND, TO RELEASE, INDEMNIFY, DEFEND, AND HOLD 
HARMLESS THE SELLER GROUP FROM AND AGAINST ANY AND ALL CLAIMS, ACTIONS, 
LIABILITIES, LOSSES, DAMAGES, COSTS, OR EXPENSES (INCLUDING COURT COSTS AND 
ATTORNEYS' FEES) OF ANY KIND OR CHARACTER ARISING OUT OF OR OTHERWISE 
RELATING TO THE OWNERSHIP OR OPERATION OF THE PROPERTIES ON AND AFTER THE 
EFFECTIVE DATE. IN CONNECTION WITH (BUT NOT IN LIMITATION OF) THE FOREGOING, 
IT IS SPECIFICALLY UNDERSTOOD AND AGREED THAT MATTERS ARISING OUT OF OR 
OTHERWISE RELATING TO THE OWNERSHIP OR OPERATION OF THE PROPERTIES ON AND 
AFTER THE EFFECTIVE DATE SHALL BE DEEMED TO INCLUDE ALL MATTERS ARISING OUT 
OF THE STATUS AND THE CONDITION OF THE PROPERTIES ON THE EFFECTIVE DATE 
INCLUDING, WITHOUT LIMITATION, ALL OBLIGATIONS TO PROPERLY PLUG AND ABANDON 
WELLS LOCATED ON THE PROPERTIES, TO RESTORE THE SURFACE OF THE PROPERTIES TO 
AS NEAR ITS ORIGINAL CONDITION AS PRACTICABLE AND TO COMPLY WITH, OR BRING 
THE PROPERTIES INTO COMPLIANCE WITH, APPLICABLE ENVIRONMENTAL LAWS AND 
REGULATIONS, INCLUDING ALL LIABILITY AND EXPENSE FOR ANY RESTORATION, 
REMEDIATION, CLEAN-UP, DISPOSAL OF WASTE, OR REMOVAL THAT MAY BE INCURRED AS 
A RESULT OF THE EXISTENCE OR DISCOVERY OF NATURALLY OCCURRING RADIOACTIVE 
MATERIALS, OR OTHER HAZARDOUS OR DELETERIOUS SUBSTANCES IN, ON, UNDER OR 
ASSOCIATED WITH THE PROPERTIES, REGARDLESS OF WHEN THE EVENTS OCCURRED THAT 
GIVE RISE TO SUCH CONDITION, AND THE ABOVE PROVIDED FOR ASSUMPTIONS AND 
INDEMNIFICATIONS BY BUYER SHALL EXPRESSLY COVER AND INCLUDE SUCH MATTERS. THE 
FOREGOING ASSUMPTIONS AND INDEMNIFICATIONS SHALL APPLY WHETHER OR NOT SUCH 
DUTIES, OBLIGATIONS, OR LIABILITIES, OR SUCH CLAIMS, ACTIONS, CAUSES OF 
ACTION, LIABILITIES, DAMAGES, LOSSES, COSTS, OR EXPENSES ARISE OUT OF (i) 
NEGLIGENCE (INCLUDING SOLE NEGLIGENCE, SIMPLE NEGLIGENCE, CONCURRENT 
NEGLIGENCE, ACTIVE OR PASSIVE NEGLIGENCE, OR OTHERWISE, BUT EXPRESSLY NOT 
INCLUDING GROSS NEGLIGENCE OR WILLFUL MISCONDUCT) OF SELLER GROUP OR ANY 
OTHER INDEMNIFIED PARTY, OR (ii) STRICT LIABILITY.

     18.  ENVIRONMENTAL ASSESSMENT AND INDEMNIFICATION BY BUYER.  BUYER 
EXPRESSLY ACKNOWLEDGES THAT IT HAS MADE AN ENVIRONMENTAL ASSESSMENT OF THE 
PROPERTIES, OR WILL BE GIVEN THE OPPORTUNITY TO DO SO SUBJECT TO THE TERMS OF 
THIS AGREEMENT. BUYER HEREBY AGREES TO ASSUME THE RISKS THAT THE PROPERTIES 
MAY CONTAIN WASTE MATERIALS OR HAZARDOUS SUBSTANCES, AND THAT ADVERSE 
PHYSICAL CONDITIONS, INCLUDING BUT NOT LIMITED TO THE PRESENCE OF WASTE 
MATERIALS OR HAZARDOUS SUBSTANCES OR THE PRESENCE OF UNKNOWN ABANDONED OIL 
AND GAS WELLS, WATER WELLS, SUMPS AND PIPELINES, MAY EXIST IN, ON, OR UNDER 
THE PROPERTIES AS OF THE EFFECTIVE DATE, ALL RESPONSIBILITY AND LIABILITY 
RELATED TO ALL SUCH CONDITIONS, WHETHER KNOWN OR UNKNOWN, WILL BE TRANSFERRED 
FROM SELLER TO BUYER. BUYER ASSUMES FULL RESPONSIBILITY FOR, AND AGREES TO 
INDEMNIFY, HOLD HARMLESS AND DEFEND SELLER FROM AND AGAINST ALL 

                                       19
<PAGE>

LOSS, LIABILITY, CLAIMS, FINES, EXPENSES, COSTS (INCLUDING ATTORNEYS' FEES 
AND EXPENSES) AND CAUSES OF ACTION CAUSED BY OR ARISING OUT OF ANY FEDERAL, 
STATE OR LOCAL LAWS, RULES, ORDERS AND REGULATIONS APPLICABLE TO ANY 
NATURALLY OCCURRING RADIOACTIVE MATERIALS, WASTE MATERIAL OR HAZARDOUS 
SUBSTANCES ON OR ASSOCIATED WITH THE PROPERTIES OR THE PRESENCE, DISPOSAL, 
RELEASE OR THREATENED RELEASE OF ALL NATURALLY OCCURRING RADIOACTIVE 
MATERIALS, WASTE MATERIAL OR HAZARDOUS SUBSTANCES FROM THE PROPERTIES INTO 
THE ATMOSPHERE OR INTO OR UPON LAND OR ANY WATER COURSE OR BODY OF WATER, 
INCLUDING GROUND WATER, WHETHER OR NOT ATTRIBUTABLE TO SELLER'S ACTIVITIES OR 
THE ACTIVITIES OF THIRD PARTIES (REGARDLESS OF WHETHER OR NOT SELLER WAS OR 
IS AWARE OF SUCH ACTIVITIES) PRIOR TO, DURING OR AFTER THE PERIOD OF SELLER'S 
OWNERSHIP OF THE PROPERTIES. THIS INDEMNIFICATION AND ASSUMPTION SHALL ALSO 
APPLY TO LIABILITY FOR VOLUNTARY ENVIRONMENTAL RESPONSE ACTIONS UNDERTAKEN 
PURSUANT TO THE COMPREHENSIVE ENVIRONMENTAL RESPONSE COMPENSATION AND 
LIABILITY ACT (CERCLA) OR ANY OTHER FEDERAL, STATE OR LOCAL LAW.

     19.  DISCLAIMER OF WARRANTIES.  THE PROPERTIES SHALL BE CONVEYED 
PURSUANT HERETO WITHOUT ANY WARRANTY OR REPRESENTATION WHATSOEVER, WHETHER 
EXPRESS, IMPLIED OR STATUTORY AS TO, DESCRIPTION, QUANTITY, QUALITY, FITNESS 
FOR A PARTICULAR PURPOSE, CONFORMITY TO THE MODELS OR SAMPLES OF MATERIALS, 
OR MERCHANTABILITY OF ANY EQUIPMENT OR ITS FITNESS FOR ANY PURPOSE, OR 
OTHERWISE. BUYER SHALL HAVE INSPECTED, OR WAIVED (AND AS OF THE DEFECT NOTICE 
DATE SHALL BE DEEMED TO HAVE WAIVED) ITS RIGHT TO INSPECT, THE PROPERTIES FOR 
ALL PURPOSES AND SATISFIED ITSELF AS TO THEIR PHYSICAL AND ENVIRONMENTAL 
CONDITION, BOTH SURFACE AND SUBSURFACE, INCLUDING, BUT NOT LIMITED TO, 
CONDITIONS SPECIFICALLY RELATED TO THE PRESENCE, RELEASE, OR DISPOSAL OF 
HAZARDOUS SUBSTANCES, SOLID WASTES, ASBESTOS, OR OTHER MANMADE FIBERS OR 
NATURALLY OCCURRING RADIOACTIVE MATERIALS ("NORM") IN, ON, OR UNDER THE 
PROPERTIES.  BUYER IS RELYING SOLELY UPON ITS OWN INSPECTION OF THE 
PROPERTIES, AND BUYER SHALL, EXCEPT AS PROVIDED OTHERWISE HEREIN, ACCEPT ALL 
OF THE SAME "AS IS, WHERE IS".  WITHOUT LIMITATION OF THE FOREGOING, SELLER 
MAKES NO WARRANTY OR REPRESENTATION, EXPRESS, IMPLIED, STATUTORY, OR 
OTHERWISE, AS TO THE ACCURACY OR COMPLETENESS OF ANY DATA, REPORTS, RECORDS, 
PROJECTIONS, INFORMATION, OR MATERIALS NOW, HERETOFORE, OR HEREAFTER 
FURNISHED OR MADE AVAILABLE TO BUYER IN CONNECTION WITH THIS AGREEMENT, 
INCLUDING, WITHOUT LIMITATION, PRICING ASSUMPTIONS OR QUALITY OR QUANTITY OF 
HYDROCARBON RESERVES (IF ANY) ATTRIBUTABLE TO THE PROPERTIES OR THE ABILITY 
OR POTENTIAL OF THE PROPERTIES TO PRODUCE HYDROCARBONS OR THE ENVIRONMENTAL 
CONDITION OF THE  PROPERTIES OR ANY OTHER MATTERS CONTAINED IN THE 
PROPRIETARY DATA OR ANY OTHER MATERIALS FURNISHED OR MADE AVAILABLE TO BUYER 
BY SELLER OR BY SELLER'S AGENTS OR REPRESENTATIVES.  ANY AND ALL SUCH DATA, 
RECORDS, REPORTS, PROJECTIONS, INFORMATION, AND OTHER MATERIALS (WRITTEN OR 
ORAL) FURNISHED BY SELLER OR OTHERWISE MADE AVAILABLE OR DISCLOSED TO BUYER 
ARE PROVIDED TO BUYER AS A CONVENIENCE AND SHALL NOT CREATE NOR GIVE RISE TO 
ANY LIABILITY OF OR AGAINST SELLER, AND ANY RELIANCE ON OR USE OF THE SAME 
SHALL BE AT BUYER'S SOLE RISK TO THE MAXIMUM EXTENT PERMITTED BY LAW.

     20.  BUYER'S COVENANT NOT TO SUE SELLER GROUP.  Except to enforce the 
provisions of this Agreement or the responsibilities and liabilities of 
Seller for claims, costs and expenses with respect 

                                       20
<PAGE>

to the Properties prior to the Effective Date according to Section 17., Buyer 
covenants not to sue Seller Group with regard to any claim or liability 
relating to the Properties, or this transaction, regardless of when or how 
the claim or liability arose or arises or whether the claim or liability was 
foreseeable or unforeseeable.  BUYER'S COVENANT NOT TO SUE SELLER GROUP 
INCLUDES CLAIMS AND LIABILITIES RESULTING IN ANY WAY FROM THE NEGLIGENCE OR 
STRICT LIABILITY OF SELLER GROUP, WHETHER THE NEGLIGENCE OR STRICT LIABILITY 
IS ACTIVE, PASSIVE, JOINT, CONCURRENT OR SOLE.

     21.  COMMISSIONS.  Seller agrees to indemnify and hold harmless Buyer, 
its parent and subsidiary companies and other affiliates, and their 
directors, officers, employees, and agents from and against any and all 
claims, obligations, actions, liabilities, losses, damages, costs, or 
expenses (including court costs and attorneys' fees) of any kind or character 
arising out of or resulting from any agreement, arrangement, or understanding 
by, or on behalf of, Seller with any broker or finder in connection with this 
Agreement or the transaction contemplated hereby. Buyer agrees to indemnify 
and hold harmless Seller Group from and against any and all claims, 
obligations, actions, liabilities, losses, damages, costs, or expenses 
(including court costs and attorneys' fees) of any kind or character arising 
out of or resulting from any agreement, arrangement, or understanding by, or 
on behalf of, Buyer with any broker or finder in connection with this 
Agreement or the transaction contemplated hereby.

     22.  CASUALTY LOSS.  If the Properties are damaged by fire or other 
casualty prior to the Closing, this Agreement shall remain in full force and 
effect, and (unless Buyer and Seller shall otherwise agree) in such event as 
to each such damaged Property that Seller, in its sole discretion, elects not 
to repair, Buyer either may treat such Property as if it had an Asserted 
Defect or elect not to adjust the Purchase Price therefor.  If Buyer elects 
hereunder to treat the damaged Property as if it had an Asserted Defect, the 
procedure provided for in Section 11. shall apply to such Property, and all 
rights to insurance proceeds and claims against third parties related thereto 
shall belong to Seller.  If Buyer elects hereunder not to adjust the Purchase 
Price for such damaged Property, and if Seller is entitled to any claims 
under an insurance policy with respect to such damage, Seller shall either 
collect and pay over, or assign, such insurance claims to Buyer. Buyer shall 
then take title to such Property without reduction of the Purchase Price.  If 
Seller elects to repair a damaged Property, all rights to insurance proceeds 
and claims against third parties related thereto shall belong to Seller.

     23.  NOTICES.  All notices and other communications required or 
permitted under this Agreement shall be in writing, unless otherwise 
specifically provided herein, and shall be delivered by recognized commercial 
courier or delivery service (which provides a receipt), by facsimile (with 
receipt acknowledged), or by registered or certified mail (postage prepaid), 
at the following addresses:

     If to Buyer:       Continental Resources, Inc.
                        P. O. Box 1032
                        Enid, Oklahoma 73702
                        Attn:  Land Manager
                        Fax No. (405) 548-5182

     If to Seller:      Bass Enterprises Production Co.
                        210 Main Street
                        Fort Worth, Texas 76102
                        Attn:  W. Frank McCreight
                        Fax No. (817) 390-8893

All such notices and communications shall be considered delivered on the date 
of receipt. Buyer or Seller may specify as its proper address any other 
address within the continental United States by giving notice to the other 
party, in the manner provided in this Section.

     24.  SURVIVAL OF PROVISIONS.  All representations, warranties, and 
indemnifications made herein, except as to any warranty of title by Seller, 
shall survive the Closing and the delivery of the 

                                       21
<PAGE>

Assignment and Bill of Sale. All obligations hereunder not satisfied at 
Closing shall survive Closing and delivery of the Assignment and Bill of Sale 
to the extent the Parties intend for such obligations to be satisfied after 
Closing.  Buyer shall have until the Defect Notice Date in which to satisfy 
itself as! to the quantity and quality of Seller's title to the Properties.

     25.  MISCELLANEOUS MATTERS.

          (a)    FURTHER ASSURANCES.  After the Closing, Seller and Buyer shall
          execute and deliver, and shall otherwise cause to be executed and
          delivered, from time to time, such further instruments, notices,
          division orders, transfer orders, and other documents, and do such
          other and further acts and things as may be reasonably necessary more
          fully and effectively to grant, convey, and assign the Properties to
          Buyer.

          (b)    ASSIGNABILITY.  Except as provided below, neither party shall
          have the right to assign its rights under this Agreement without the
          prior written consent of the other party, and any such assignment in
          violation of this provision shall be void.

          (c)    GAS BALANCES.  Seller represents that there are no gas
          imbalances or make-up obligations affecting or relating to any of the
          properties.

          (d)    WAIVER AND REPRESENTATION:  TO THE EXTENT APPLICABLE TO THE
          TRANSACTION CONTEMPLATED HEREBY, OR ANY PORTION THEREOF, BUYER WAIVES
          THE PROVISIONS OF THE TEXAS DECEPTIVE TRADE PRACTICES ACT, CHAPTER 17,
          SUBCHAPTER E, SECTIONS 17.41 THROUGH 17.63, INCLUSIVE (OTHER THAN
          SECTION 17.555 WHICH IS NOT WAIVED), TEXAS BUSINESS AND COMMERCE CODE.
          In connection with such waiver, Buyer hereby represents and warrants
          to Seller that Buyer (a) is in the business of seeking or acquiring by
          purchase or lease, goods or services for commercial or business use,
          (b) has assets of Twenty Five Million Dollars ($25,000,000.00) or more
          according to its most recent financial statement, (c) has knowledge
          and experience in financial and business matters that enable it to
          evaluate the merits and risks of the transaction contemplated hereby,
          and (d) is not in a significantly disparate bargaining position.

          (e)    CONFIDENTIALITY AGREEMENT.  Until Closing, any Confidentiality
          Agreement executed by Buyer and Seller in connection with the
          transaction contemplated hereby remains in full force and effect and
          is not superseded or modified by this Agreement.

          (f)    PRIOR ENTIRE UNDERSTANDING/HEADINGS/GENDER.  This Agreement
          contains the entire understanding of the parties hereto with respect
          to the subject matter hereof and supersedes all prior agreements,
          understandings, negotiations, and discussions among the parties with
          respect to such subject matter, except as provided above with respect
          to any Confidentiality Agreement. The headings contained in this
          Agreement are for convenience only and shall not control or affect the
          meaning or construction of any provision of this Agreement.  Within
          this Agreement, words of any gender shall be held and construed to
          cover any other gender, and words in the singular shall be held and
          construed to cover the plural, unless the context otherwise requires. 
          Time is of the essence in this Agreement.

          (g)    AMENDMENTS.  This Agreement may be amended, modified,
          supplemented, restated, or discharged (and provisions hereof may be
          waived) only by an instrument executed by both Parties.

          (h)    ASSOCIATED EXPENSES.  Each party shall bear and pay all
          expenses it incurred and that are associated with the transaction
          contemplated by this Agreement.  Payment of recording fees, filing
          fees, documentary stamp taxes, all sales taxes (if any, plus penalty
          and interest) and any other fees and taxes imposed on the Properties

                                       22
<PAGE>

          on and after the Effective Date, excluding Seller's income taxes,
          shall be paid by Buyer.

          (i)    SUCCESSORS AND ASSIGNS.  This Agreement shall be binding on the
          parties hereto and their respective heirs, successors,
          representatives, and assigns.

          (j)    COUNTERPARTS.  This Agreement may be executed in any number of
          counterparts, each of which shall be deemed an original, but all of
          which shall constitute one (1) and the same instrument.  It shall not
          be necessary for both parties to sign the same counterpart.

          (k)    ENFORCEABILITY.  WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF
          LAW, THIS AGREEMENT SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH
          AND GOVERNED BY THE LAWS OF THE STATE OF TEXAS APPLICABLE TO CONTRACTS
          MADE AND TO BE PERFORMED ENTIRELY WITHIN SUCH STATE AND BY THE LAWS OF
          THE UNITED STATES OF AMERICA, EXCEPT THAT, TO THE EXTENT THE LAW OF A
          STATE IN WHICH THE PROPERTIES ARE LOCATED NECESSARILY GOVERNS, THE LAW
          OF SUCH STATE SHALL, TO SUCH EXTENT, APPLY TO THE PROPERTIES.

          (l)    PUBLICITY.  Prior to Closing, Buyer shall not issue any
          publicity or press release concerning this Agreement or the
          transaction contemplated hereby without the prior written consent of
          Seller unless, in the written opinion of legal counsel acceptable to
          Seller, such disclosure is required by applicable law or other
          applicable rules or regulations of any governmental authority or stock
          exchange and such publicity or press release contains no more than the
          minimum information necessary to comply therewith.

          (m)    USE OF SELLER'S NAME.  Buyer agrees that, as soon as
          practicable after the Closing, it shall remove or cause to be removed
          the names and signs used by Seller, and all variations and derivatives
          thereof and logos relating thereto from the Properties and shall not
          thereafter make any use whatsoever of such names, signs, and logos. 
          After Closing and as to those Properties Buyer has taken over as
          operator, Seller reserves the right of access to confirm that Buyer
          has removed Seller's name, signs, and logos.  If Seller is forced to
          remove its name, signs, and logos because Buyer has failed to do so,
          Seller shall charge its costs to Buyer and Buyer shall pay Seller's
          invoice within fifteen (15) days of receipt.

          (n)    SEVERABILITY.  If any term or provision of this Agreement is
          determined to be invalid, illegal, or incapable of being enforced by
          any rule of law or public policy, all other conditions and provisions
          of this Agreement shall nevertheless remain in full force and effect
          so long as the economic or legal substance of the transactions
          contemplated hereby is not affected in any material fashion to either
          Buyer or Seller.  Upon such determination that any term or other
          provision is invalid, illegal, or incapable of being enforced, Buyer
          and Seller shall negotiate in good faith to modify this Agreement so
          as to effect the original intent of the Parties as closely as possible
          in an acceptable manner to the end that the transactions contemplated
          hereby are fulfilled to the extent possible.

          (o)    RESERVATION OF CLAIMS.  Seller reserves all rights to claims,
          demands, cause of action, and lawsuits concerning the Properties
          against third parties that accrued before the Effective Date, whether
          discovered before or after the Effective Date, excluding any rights or
          claims associated with gas imbalances.

          (p)    DUTY TO DEFEND.  Where a party ("indemnitor") has agreed to
          indemnify, defend, and hold the other party ("indemnitee") harmless
          under this Agreement the indemnitee, at its sole option if it is the
          sole defendant, may elect to (a) manage its 

                                       23
<PAGE>

          own defense, in which event the indemnitor will reimburse the 
          indemnitee for all attorney's fees, court, and other costs reasonably 
          incurred in defending a claim, upon delivery to the indemnitor of 
          invoices for such expenses; or (b) allow the indemnitor to be 
          responsible for all aspects of defense.  If both parties are 
          defendants in a claim, they shall reasonably endeavor to arrange for 
          joint defense to minimize defense costs, but failure to reach such 
          agreement shall in no event eliminate or limit any indemnity 
          obligations hereunder.

          (q)    EXHIBITS.  All exhibits referenced herein and attached hereto
          are by reference incorporated into this Agreement.

     IN WITNESS WHEREOF, this Agreement is executed by the parties hereto on 
the date set forth above, but effective as of the Effective Date.

                              SELLERS

                              BASS ENTERPRISES PRODUCTION CO.


                              By:  /s/ W. FRANK MCCREIGHT                    
                                   ------------------------------------------
                                   W. Frank McCreight
                                   Vice President

                              PERRY R. BASS, INC.,
                              SID R. BASS, INC.,
                              LEE M. BASS, INC.,
                              KEYSTONE, INC.,
                              THRU LINE INC.


                              By:  /s/ W. FRANK MCCREIGHT                  
                                   ------------------------------------------
                                   W. Frank McCreight
                                   Vice President of all named corporations

                              GOLIAD PARTNERS, L.P.
                              By its Managing Partners
                              PRB-GP, Inc.
                              LMB-GP, Inc.
                              WPH-GP, Inc.


                              By:  /s/ W. FRANK MCCREIGHT               
                                   ------------------------------------------
                                   W. Frank McCreight
                                   Vice President of all named corporations

                              THE BASS MANAGEMENT TRUST


                              By:  /s/ PERRY R. BASS
                                   ------------------------------------------
                                   Perry R. Bass, Trustee


                              SID R. BASS, MANAGEMENT TRUST


                              By:  /s/ SID R. BASS  
                                   ------------------------------------------
                                   Sid R. Bass, Trustee

                                       24
<PAGE>

                              By:  /s/ LEE M. BASS  
                                   ------------------------------------------
                                   Lee M. Bass


                              D W  GENPAR, INC.


                              By:  /s/ W. FRANK MCCREIGHT 
                                   ------------------------------------------
                                   W. Frank McCreight
                                   Vice President


                              W D. PARTNERS, L. P.
                              By DW Genpar, Inc., General Partner

                              By:  /s/ W. FRANK MCCREIGHT 
                                   ------------------------------------------
                                   W. Frank McCreight
                                   Vice President

                              WPH-GP, INC.


                              By:  /s/ W. FRANK MCCREIGHT 
                                   ------------------------------------------
                                   W. Frank McCreight
                                   Vice President

                              WORLAND ASSOCIATES, Texas General Partnership
                              By: Sid R. Bass, Inc. Managing Partner


                              By:  /s/ W. FRANK MCCREIGHT                  
                                   ------------------------------------------
                                   W. Frank McCreight
                                   Vice President


                              WORLAND ASSOCIATES II
                              By: Sid R. Bass, Inc. Managing Partner


                              By:  /s/ W. FRANK MCCREIGHT                  
                                   ------------------------------------------
                                   W. Frank McCreight
                                   Vice President

                              BUYER

                              CONTINENTAL RESOURCES, INC.


                              By:/s/ HAROLD HAMM                           
                                   ------------------------------------------
                                   Harold Hamm
                                   President


                                       25
<PAGE>

                                  EXHIBIT "A"

    Attached to and made a part of that certain Assignment and Bill of Sale  
dated July 15th, 1998 by and between Continental Resources, Inc., Assignor, and
Harold G. Hamm, as Trustee of the Harold G. Hamm Revocable Intervivos Trust 
                             dated April 23, 1984



BIG HORN COUNTY, WYOMING:

Assignment and Bill of Sale dated effective June 1, 1998 by and between BASS 
ENTERPRISES PRODUCTION CO., et al, ASSIGNORS, and CONTINENTAL RESOURCES, 
INC., Assignee, recorded in Book MF42, Page 914-926, Big Horn County, Wyoming.

WASHAKIE COUNTY, WYOMING:

Assignment and Bill of Sale dated effective June 1, 1998 by and between BASS 
ENTERPRISES PRODUCTION CO., et al, ASSIGNORS, and CONTINENTAL RESOURCES, 
INC., Assignee, recorded in Book 77, Page 1227-1396, Washakie County, Wyoming.

HOT SPRINGS COUNTY, WYOMING:

Assignment and Bill of Sale dated effective June 1, 1998 by and between BASS 
ENTERPRISES PRODUCTION CO., et al, ASSIGNORS, and CONTINENTAL RESOURCES, 
INC., Assignee, recorded in Book 77, Page 138-147, Hot Springs County, 
Wyoming.

<PAGE>
                                       EXHIBIT B

                             ASSIGNMENT AND BILL OF SALE

                                                WASHAKIE COUNTY: WYO. NO. 466643
                                           RECORDED MICRO BOOK 77 PAGE 1227-1396
                                             DATE May 19, 1998 8:00 a.m. O'CLOCK

STATE OF WYOMING         )
                         )  KNOW ALL MEN BY THESE PRESENTS, THAT
COUNTIES OF BIG HORN     )
     HOT SPRINGS, AND    )
     WASHAKIE            )

     THIS ASSIGNMENT AND BILL OF SALE ("Assignment") is made effective as of
7:00 a.m., Mountain Standard Time on June 1, 1998 (the "Effective Time") by and
between the undersigned parties under "ASSIGNORS" (hereinafter collectively
referred to as "Assignor"), all having an address of 201 Main Street, Fort
Worth, Texas 76102; and Continental Resources, Inc. (hereinafter referred to as
"Assignee"), whose address is P.O. Box 1032, Enid, Oklahoma 73702.

     Assignor, for Ten Dollars ($10.00) and other good and valuable
consideration in hand by Assignee, the receipt and sufficiency of which is
hereby acknowledged, by these PRESENTS DOES hereby GRANT, BARGAIN, SELL, CONVEY,
ASSIGN, TRANSFER, SET OVER, AND DELIVER unto Assignee, the following described
properties:

     A.    All rights, titles, and interests of Assignor in an to: 1) the oil,
     gas, and mineral leases described in Exhibit A hereto (including
     landowner's royalty and any ratifications and amendments to such leases,
     whether such ratifications and amendments are described in Exhibit A); and
     2) the wells described in Exhibit B hereto;

     B.   All rights, titles, and interests of Assignor in and to, or otherwise
     derived from, all presently existing and valid oil, gas, and mineral
     unitization, pooling, and communitization agreements, declarations, and
     orders (including, without limitation, all units formed under orders,
     rules, regulations, or other official acts of any federal, state, or other
     authority having jurisdiction, and voluntary unitization agreements,
     designations, and declarations) relating to the properties described in
     Paragraph A. to the extent such rights, titles, and interests are
     attributable to the properties described in Paragraph A.;

     C.   All rights, titles, and interests of Assignor in and to all presently
     existing and valid production sales contracts, operating agreements, and
     other agreements and contracts that relate to any of the properties
     described in Paragraphs A. and B., to the extent such rights, titles, and
     interests are assignable and attributable to the properties described in
     Paragraphs A. and B.;

     D.   All rights, titles, and interests of Assignor in and to all
     rights-of-way, easements. surface leases, permits, and licenses appurtenant
     to the properties described in Paragraphs A. and B.; and,

     E.   All rights, titles, and interests of Assignor in and to all materials,
     supplies, machinery. equipment, improvements, and other personal property
     and fixtures (including, but not limited to, wellhead equipment, pumping
     units, flowlines, tanks, buildings, injection facilities. saltwater
     disposal facilities, compression facilities, gathering systems, and other
     equipment) located on the properties described in Paragraphs A. and B. and
     used in connection with the exploration, development, operation, or
     maintenance thereof.  The rights, titles, and interests of Assignor
     described above in Paragraphs A., B., C., D., and E. and conveyed to
     Assignee hereby are herein sometimes collectively called the "Purchased
     Properties".

<PAGE>

     TO HAVE AND TO HOLD unto Assignee, its successors and assigns, forever the
Purchased Properties subject to the following terms and conditions:

     1.   PURCHASE AND SALE AGREEMENT:  This Assignment is made subject to that
     certain Purchase and Sale Agreement dated March 28, 1998, by and between
     Assignor and Assignee affecting the sale of the Purchased Properties.

     2.   ASSUMPTION AND INDEMNIFICATION:  Assignee, by acceptance of this
     Assignment, hereby covenants and agrees to assume, to pay and perform
     timely, all duties. expenses, obligations, losses, hazards, and liabilities
     relating to the ownership or operation of the Purchased Properties arising
     on and after the Effective Time (including, without limitation, those
     arising under or by virtue of any lease, contract, agreements, document,
     permit or rule, or delay in obtaining approval of federal or state
     assignments); and, to release, indemnify, defend, and hold harmless
     Assignor from and against any and all claims, actions, liabilities, losses,
     damages, costs, or expenses (including court costs and attorneys' fees) of
     any kind or character arising out of or otherwise relating to the ownership
     or operation of the Purchased Properties on and after the Effective Time.
     In connection with (but not in limitation of) the foregoing, it is
     specifically understood and agreed that matters arising out of or otherwise
     relating to the ownership or operation of the Purchased Properties on and
     after the Effective Time shall be deemed to include all matters arising out
     of the status and the condition of the Purchased Properties on the
     Effective Time including, without limitation, all obligations to properly
     plug and abandon wells located on the Purchased Properties, to restore the
     surface of the Purchased Properties to as near its original condition as
     practicable and to comply with, or bring the Purchased Properties into
     compliance with applicable environmental laws and regulations, including
     all liability and expense for any restoration, remediation, clean-up,
     disposal of waste, or removal that may be incurred as a result of the
     existence or discovery of naturally occurring radioactive materials, or
     other hazardous or deleterious substances in, on, under, or associated with
     the Purchased Properties, regardless of when the events occurred that give
     rise to such condition, and the above provided for assumptions and
     indemnifications by Assignee shall expressly cover and include such
     matters. The foregoing assumptions and indemnifications shall apply whether
     or not such duties, obligations, or liabilities, or such claims, actions,
     causes of action, liabilities~ damages, losses, costs, or expenses arise
     out of (i) negligence (including sole negligence, simple negligence,
     concurrent negligence, active or passive negligence, or otherwise, but
     expressly not including gross negligence or willful misconduct) of
     Assignor, or (ii) strict liability.

     3.   ENVIRONMENTAL ASSESSMENT AND INDEMNIFICATION BY ASSIGNEE:  Assignee
     hereby acknowledges that it has made an environmental assessment of the
     Purchased Properties, or has been afforded the opportunity to do so, and
     satisfied itself as to the physical and environmental condition of the
     Purchased Properties, both surface and subsurface.  Assignee hereby assumes
     the risks that the Purchased Properties may contain waste materials or
     hazardous substances, and that adverse physical conditions, including, but
     not limited to, the presence of waste materials or hazardous substances or
     the presence of unknown abandoned oil and gas wells, water wells, sumps and
     pipelines, may exist in, on, or under the properties as of the Effective
     Time, all responsibility and liability related to all such conditions,
     whether known or unknown, are hereby transferred from Assignor to Assignee.
     Assignee assumes full responsibility for, and agrees to indemnify, hold
     harmless, and defend Assignor from and against all loss, liability, claims,
     fines, expenses, costs (including 

                                       2
<PAGE>

     attorneys' fees and expenses), and causes of action caused by or arising
     out of any federal, state, or local laws, rules, orders, and regulations 
     applicable to any naturally occurring radioactive materials, waste 
     material, or hazardous substances on or associated with the Purchased 
     Properties or the presence, disposal, release or threatened release of 
     all naturally occurring radioactive materials, waste material, or 
     hazardous substances from the Purchased Properties into the atmosphere 
     or into or upon land or any water course or body of water, including 
     ground water, whether attributable to Assignor's activities or the 
     activities of third parties (regardless of whether Assignor was or is 
     aware of such activities prior to, during, or after the period of 
     Assignor's ownership of the Purchased Properties. This indemnification 
     and assumption shall also apply to liability or voluntary environmental 
     response actions undertaken pursuant to the Comprehensive Environmental 
     Response Compensation and Liability Act (CERCLA) or any other federal, 
     state or local law.

     4.   DISCLAIMER OF WARRANTIES:  Assignee acknowledges that it has relied
     solely on its own independent investigation of the Purchased Properties,
     both surface and subsurface, in making its decision to acquire the
     Purchased Properties; and, that Assignor has made no representations or
     warranties as to the accuracy or completeness of any information which may
     have been provided Assignee by Assignor.  Assignee accepts all personal
     property and fixtures associated with the Purchased Properties "AS IS" and
     "WHERE IS" and Assignor hereby expressly disclaims, negates, and makes this
     Assignment with NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, AT
     COMMON LAW, BY STATURE, OR OTHERWISE, RELATING TO THE PURCHASED PROPERTIES
     AS TO DESCRIPTION, QUANTITY, QUALITY, CONDITION, FITNESS FOR A PARTICULAR
     PURPOSE, CONFORMITY TO MODELS, OR SAMPLES OF MATERIALS, OR MERCHANTABILITY,
     OR OTHERWISE.

     5.   FEDERAL AND STATE ASSIGNMENTS:  Separate state and federal assignments
     of the Purchased Properties will be prepared by Assignor into Assignee
     using the approved forms of the appropriate governmental agency.  Such
     assignments shall be deemed to contain all of the rights, titles,
     interests, assumptions, indemnifications, disclaimers, and lack of
     warranties as set forth herein, as though fully set forth in such
     assignments, but no more. The interests conveyed by such separate
     assignments are the same and. not in addition to, the interests conveyed
     hereunder.

     6.   WARRANTY OF TITLE:  This Assignment is made without warranty of title
     of any kind, express or implied, except that Assignor agrees to defend
     title against claims and demands of all persons claiming the same by,
     through or under Assignor, but not otherwise.

     This Assignment may be signed in any number of counterparts, each of which
shall be deemed to be an original, but all such counterparts shall constitute
but one and the same Assignment.

     All of the terms and provisions of this Assignment shall be binding upon
and inure to the benefit of Assignee and Assignor and their respective heirs,
successors, representatives, and assigns.

     All exhibits referenced herein and attached hereto are by reference
incorporated into this Assignment.

     IN WITNESS WHEREOF, this Assignment was executed on the dates contained in
the acknowledgments herein, but to be effective as of the Effective Time as
stated in the first paragraph hereof.

                                       3
<PAGE>

                                      ASSIGNORS


CORPORATE SEAL OF                      BASS ENTERPRISES PRODUCTION CO.
BASS ENTERPRISES PRODUCTION CO.

ATTEST:

By: /s/ DORSEY D. CROUSE               By: /s/ W. FRANK McCREIGHT
   -------------------------------        -----------------------------------
   Dorsey D. Crouse, Assistant         W. Frank McCreight, Vice President
   Secretary

CORPORATE SEALS OF
PERRY R. BASS, INC.                    Perry R. Bass, Inc.,
SID R. BASS, INC.                      Sid R. Bass, Inc.,
LEE M. BASS, INC.                      Lee M. Bass, Inc.,
KEYSTONE, INC.                         Keystone, Inc.,
THRU LINE INC.                         Thru Line Inc.

ATTEST:


By: /s/ DORSEY D. CROUSE               By: /s/ W. FRANK McCREIGHT
   -------------------------------        -----------------------------------
   Dorsey D. Crouse, Assistant         W. Frank McCreight, Vice President
   Secretary                           of all named corporations


                                       GOLIAD PARTNERS, L.P.
CORPORATE SEALS OF                     By: Its Managing Partners
PRB-GP, INC.                           PRB-GP, Inc.
LMB-GP, INC.                           LMB-GP, Inc.
WPH-GP, INC.                           WPH-GP, Inc.

ATTEST:


By:/s/ DORSEY D. CROUSE                By: /s/ W. FRANK McCREIGHT
   -------------------------------        -----------------------------------
   Dorsey D. Crouse, Assistant         W. Frank McCreight, Vice President
   Secretary

                                       /s/ PERRY R. BASS
                                       --------------------------------------
                                       PERRY R. BASS, TRUSTEE


                                       /s/ SID R. BASS
                                       --------------------------------------
                                       SID R. BASS, TRUSTEE


                                       /s/ LEE M. BASS
                                       --------------------------------------
                                       Lee M. Bass

CORPORATE SEAL OF                      DW GENPAR, INC.
DW GENPAR, INC.

ATTEST:


By: /s/ DORSEY D. CROUSE               By: /s/ W. FRANK McCREIGHT
   -------------------------------        -----------------------------------
   Dorsey D. Crouse, Assistant         W. Frank McCreight, Vice President
   Secretary


CORPORATE SEAL OF                      WD PARTNERS, L. P.
DW GENPAR, INC.                        By: DW Genpar, Inc., General Partner

ATTEST:


By: /s/ DORSEY D. CROUSE               By: /s/ W. FRANK McCREIGHT
   -------------------------------        -----------------------------------
   Dorsey D. Crouse, Assistant         W. Frank McCreight, Vice President
   Secretary


                                       4
<PAGE>

CORPORATE SEAL OF                      WPH-GP, INC.
WPH-GP, INC.

ATTEST:


By: /s/ DORSEY D. CROUSE               By: /s/ W. FRANK McCREIGHT
   -------------------------------        -----------------------------------
   Dorsey D. Crouse, Assistant         W. Frank McCreight, Vice President
   Secretary


CORPORATE SEAL OF                      WORLAND ASSOCIATES, a Texas General
SID R. BASS, INC.                      Partnership
                                       By: Sid R. Bass, Inc., Managing
ATTEST:                                    Partner


By: /s/ DORSEY D. CROUSE               By: /s/ W. FRANK McCREIGHT
   -------------------------------        -----------------------------------
   Dorsey D. Crouse, Assistant         W. Frank McCreight, Vice President
   Secretary


CORPORATE SEAL OF                      WORLAND ASSOCIATES II, a Texas 
SID R. BASS, INC.                      General Partnership
                                       By: Sid R. Bass, Inc., Managing
ATTEST:                                    Partner


By: /s/ DORSEY D. CROUSE               By: /s/ W. FRANK McCREIGHT
   -------------------------------        -----------------------------------
   Dorsey D. Crouse, Assistant         W. Frank McCreight, Vice President
   Secretary


                               ASSIGNEE


CORPORATE SEAL OF                      CONTINENTAL RESOURCES, INC.
CONTINENTAL RESOURCES, INC.

ATTEST:


By: /s/ RANDY MOEDER                   By: /s/ TOM LUTTRELL
   -------------------------------        -----------------------------------
                                       Tom Luttrell, Vice President-Land



                             (ACKNOWLEDGEMENTS ATTACHED)


                                       5
<PAGE>

STATE OF TEXAS      )
                    )  ss.
COUNTY OF TARRANT   )

     The foregoing instrument was acknowledged before me by W. FRANK MCCREIGHT,
as VICE PRESIDENT OF BASS ENTERPRISES PRODUCTION CO., PERRY R. BASS, INC., SID
R. BASS, INC., LEE M. BASS, INC., KEYSTONE, INC., THRU LINE INC., PRB-GP, INC.,
LMB-GP, INC., WPH-GP, INC., and GW GENPAR, INC., this 14th day of May, 1998.

     Witness my hand and official seal.

My Commission Expires:
                                             /s/ BETTY H. PALMORE
                                             ----------------------------------
     05/07/2001                              Notary Public
- ---------------------
NOTARY SEAL OF BETTY H. PALMORE


STATE OF TEXAS      )
                    )  ss.
COUNTY OF TARRANT   )

     The foregoing instrument was acknowledged before me by Perry R. Bass,
Trustee, this 14th day of May, 1998.

     Witness my hand and official seal.

My Commission Expires:
                                             /s/ BETTY H. PALMORE
                                             ----------------------------------
     05/07/2001                              Notary Public
- ---------------------
NOTARY SEAL OF BETTY H. PALMORE


STATE OF TEXAS      )
                    )  ss.
COUNTY OF TARRANT   )

     The foregoing instrument was acknowledged before me by Sid R. Bass, this
14th day of May, 1998.

     Witness my hand and official seal.

My Commission Expires:
                                             /s/ BETTY H. PALMORE
                                             ----------------------------------
     05/07/2001                              Notary Public
- ---------------------
NOTARY SEAL OF BETTY H. PALMORE


STATE OF TEXAS      )
                    )  ss.
COUNTY OF TARRANT   )

     The foregoing instrument was acknowledged before me by Lee M. Bass, this
14th day of May, 1998.

     Witness my hand and official seal.

My Commission Expires:
                                             /s/ BETTY H. PALMORE
                                             ----------------------------------
     05/07/2001                              Notary Public
- ---------------------
NOTARY SEAL OF BETTY H. PALMORE


                                       6
<PAGE>

STATE OF TEXAS      )
                    )  ss.
COUNTY OF TARRANT   )

     The foregoing instrument was acknowledged before me by Tom Luttrell as Vice
President - Land - for Continental Resources, Inc., this 14th day of May, 1998.

     Witness my hand and official seal.

My Commission Expires:
                                             /s/ BETTY H. PALMORE
                                             ----------------------------------
     05/07/2001                              Notary Public
- ---------------------
NOTARY SEAL OF BETTY H. PALMORE

















                                       7

<PAGE>
                                                EXHIBIT C

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 001         49043053070000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 002         49043053230000      COTTONWOOD CREEK      BEPCO           PA
         COTTONWOOD CREEK UNIT 004         49043052760000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 005         49043052820000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 006         49043052730000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 007         49043053010000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 008         49043052860000      COTTONWOOD CREEK      BEPCO           PA
         COTTONWOOD CREEK UNIT 008X        49043207830000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 009         49043053030000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 010         49043052650000      COTTONWOOD CREEK      BEPCO           PA
         COTTONWOOD CREEK UNIT 010X        49043207190000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 011         49043052450000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 012         49043052690000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 014         49043052510000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 015         49043052460000      COTTONWOOD CREEK      BEPCO           PA
         COTTONWOOD CREEK UNIT 015X        49043207200000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 016         49043052710000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 017         49043052300000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 018         49043052870000      COTTONWOOD CREEK      BEPCO           PA
         COTTONWOOD CREEK UNIT 018X        49043207210000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 019         49043052520000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 020         49043052700000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 021         49043052530000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 022         49043052320000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 023         49043053040000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 024         49043052380000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 025         49043052400000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 026         49043052980000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 027         49043052390000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 028         49043052670000      COTTONWOOD CREEK      BEPCO           PA

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME              LOCATION            WI            NRI(1)        ORI(2)
- ------   -----------------------              --------            --            ------        ------
<S>      <C>                                  <C>                <C>           <C>           <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 001            SW SW 02 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 002            SW NE 03 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 004            SE SE 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 005            NW SW 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 006            NW NE 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 007            NW NW 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 008            NW SE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 008X           NW SE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 009            NW NE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 010            NW NW 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 010X           NW NW 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 011            NW SE 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 012            NW NE 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 014            NW SW 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 015            NW SW 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 015X           NW SW 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 016            NW NE 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 017            NW NW 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 018            NW SW 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 018X           NW SW 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 019            NW SE 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 020            NW NW 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 021            NW SE 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 022            NW NE 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 023            NW SW 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 024            NW NW 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 025            NW NE 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 026            NW NW 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 027            NW NE 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 028            NW NW 14 47N 91W   .91098801     .76677372     .00004650

</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 1
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 029         49043052490000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 030         49043052950000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 031         49043052500000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 032         49043052360000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 033         49043052480000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 034         49043052680000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 035         49043052840000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 036         49043052340000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 037         49043052970000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 038         49043052350000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 039         49043052830000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 040         49043051960000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 041         49043053160000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 042         49043052810000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 043         49043053710000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 044         49043052640000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 045         49043052960000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 046         49043052990000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 047         49043053300000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 048         49043052780000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 050         49043052660000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 051         49043052330000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 052         49043052630000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 053         49043053290000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 054         49043053520000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 055         49043053130000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 059         49043051970000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 060         49043051920000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 061         49043051940000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 062         49043051950000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 063         49043051870000      COTTONWOOD CREEK      BEPCO           PRD

<CAPTION>
  PP NO. PROPERTY NAME/WELL NAME            LOCATION           WI            NRI(1)        ORI(2)
  ------ -----------------------            --------           --            ------        ------
<S>      <C>                                <C>                <C>           <C>           <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 029          NW SW 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 030          NW NW 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 031          NW SE 15 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 032          NW NW 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 033          NW SW 15 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 034          NW NE 15 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 035          NW SW 10 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 036          NW NW 22 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 037          NW NE 09 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 038          NW NE 22 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 039          NW SE 09 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 040          NW SE 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 041          NW SE 04 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 042          NW SW 05 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 043          NW NE 32 48N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 044          NW NE 16 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 045          NW NW 09 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 046          NW NW 10 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 047          NW NW 04 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 048          NW SE 08 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 050          NW NW 15 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 051          NW NE 21 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 052          NW NW 16 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 053          NW NE 04 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 054          NW SE 32 48N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 055          NW SW 04 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 059          NW SE 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 060          NW SW 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 061          NW SW 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 062          NW SE 22 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 063          NW NE 26 47N 91W   .91098801     .76677372     .00004650
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 2
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 064         49043051880000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 066         49043052940000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 067         49043052880000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 068         49043052770000      COTTONWOOD CREEK      BEPCO         PA
         COTTONWOOD CREEK UNIT 069         49043052920000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 070         49043052720000      COTTONWOOD CREEK      BEPCO         PA
         COTTONWOOD CREEK UNIT 070X        49043207170000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 071         49043052620000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 072         49043052750000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 073         49043052570000      COTTONWOOD CREEK      BEPCO         SI
         COTTONWOOD CREEK UNIT 074         49043052580000      COTTONWOOD CREEK      BEPCO         PA
         COTTONWOOD CREEK UNIT 074X        49043208070000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 075         49043052410000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 077         49043052470000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 078         49043052850000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 081         49043051860000      COTTONWOOD CREEK      BEPCO         PA
         COTTONWOOD CREEK UNIT 081A        49043206300000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 082         49043052740000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 083         49043052910000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 084         49043053020000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 086         49043052930000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 087         49043052790000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 088         49043055890000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 089         49043200180000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 090         49043200170000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 091         49043200220000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 092         49043056060000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 094         49043200090000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 095         49043200350000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 096         49043200310000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 097         49043200360000      COTTONWOOD CREEK      BEPCO         PRD

<CAPTION>
  PP NO. PROPERTY NAME/WELL NAME             LOCATION            WI            NRI(1)        ORI(2)
  ------ -----------------------             --------            --            ------        ------
<S>      <C>                                 <C>                <C>           <C>           <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 064           NW NW 25 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 066           SW NW 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 067           NW SW 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 068           SE SE 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 069           NW SW 09 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 070           NW NW 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 070X          NW NW 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 071           NW NE 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 072           NW NW 16 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 073           NW SW 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 074           NW SE 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 074X          SW SE 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 075           NW NW 20 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 077           NW SE 16 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 078           NW SE 10 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 081           NW NE 27 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 081A          NW NE 27 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 082           NW NE 16 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 083           NW SE 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 084           NW NE 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 086           NW SE 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 087           NE SW 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 088           SE SE 09 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 089           SE NW 15 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 090           SE NE 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 091           SE SE 15 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 092           SE SE 01 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 094           SE SW 01 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 095           SE SW 06 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 096           NW SW 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 097           SE SE 02 47N 91W   .91098801     .76677372     .00004650
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 3
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 098         49043200550000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 101         49043201130000      COTTONWOOD CREEK      BEPCO         PA
         COTTONWOOD CREEK UNIT 102         49043201880000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 103         49043201900000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 104         49043201520000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 105         49043201850000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 106         49043201830000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 107         49043203870000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 108         49043201970000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 111         49043202110000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 113         49043202150000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 114         49043202140000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 115         49043202170000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 116         49043202160000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 118         49043202180000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 120         49043203110000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 121         49043204450000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 122         49043204450000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 123         49043204310000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 124         49043204380000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 125         49043204300000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 126         49043204320000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 127         49043204370000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 128         49043204430000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 129         49043204590000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 130         49043204500000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 131         49043204510000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 132         49043204580000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 133         49043204570000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 134         49043204560000      COTTONWOOD CREEK      BEPCO         PA
         COTTONWOOD CREEK UNIT 134X        49043207300000      COTTONWOOD CREEK      BEPCO         PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION            WI            NRI(1)        ORI(2)
- ------   -----------------------             --------            --            ------        ------
<S>      <C>                                 <C>                <C>           <C>           <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 098           NW SE 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 101           NW NW 26 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 102           NW NE 17 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 103           SE SE 22 47N 91W   .91098601     .76677372     .00004650
         COTTONWOOD CREEK UNIT 104           SE SE 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 105           SE NE 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 106           SE SW 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 107           SE SW 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 108           SE NE 16 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 111           NE SE 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 113           SE NE 17 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 114           SE NE 27 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 115           SE NW 16 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 116           SW NW 22 47N 92W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 118           SE NW 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 120           SE NW 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 121           NW SW 05 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 122           SW SW 17 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 123           SE SE 16 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 124           SE NW 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 125           SE NW 26 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 126           SE SW 22 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 127           SE NW 22 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 128           SE SW 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 129           SE SW 09 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 130           SE NW 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 131           SE NE 26 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 132           SE SW 15 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 133           SE NE 22 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 134           SE NW 27 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 134X          SE NW 27 47N 91W   .91098801     .76677372     .00004650
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 4
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 135         49043204650000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 136         49043204630000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 139         49043204930000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 141         49043264850000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 145         49043205040000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 151         49043205680000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 156         49043205640000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 157         49043205790000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 158         49043205650000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 159         49043205660000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 160         49043205800000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 161         49043205810000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 162         49043205630000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 163         49043205670000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 165         49043205630000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 166         49043205840000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 167         49043206110000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 168         49043206050000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 169         49043206040000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 171         49043206060000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 172         49043206090000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 173         49043206130000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 174         49043206150000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 175         49043206120000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 179         49043206200000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 180         49043206210000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 182         49043206190000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 183         49043206350000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 184         49043206370000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 165         49043206380000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 186         49043206420000      COTTONWOOD CREEK      BEPCO         TA

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION            WI            NRI(1)        ORI(2)
- ------   -----------------------             --------            --            ------        ------
<S>      <C>                                 <C>                <C>           <C>           <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 135           NW SE 31 48N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 136           SW SE 07 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 139           SE NW 21 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 141           SE SW 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 145           SE SE 08 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 151           SE SE 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 156           NW NE 10 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 157           SE NW 10 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 158           SE SE 10 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 159           SE SW 10 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 160           SE NE 09 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 161           SE NW 09 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 162           SE NE 15 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 163           SE NW 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 165           SE NW 17 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 166           SE SW 08 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 167           SW SE 04 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 168           SE NE 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 169           SW SW 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 171           NE NW 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 172           NE NE 27 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 173           SE NE 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 174           SE SE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 175           SE NE 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 179           SE SW 09 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 180           SE SW 04 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 182           SE NW 04 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 183           NW NW 17 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 184           SW NW 25 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 185           NW NE 05 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 186           NW SW 17 47N 91W   .91098801     .76677372     .00004650
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 5
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 199         49043206480000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 200         49043206470000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 201         49043206460000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 208         49043206490000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 210         49043207290000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 211         49043207270000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 212         49043207280000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 213         49043207260000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 214         49043207390000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 215         49043207410000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 216         49043207420000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 217         49043207350000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 218         49043207360000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 219         49043207400000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 220         49043207370000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 221         49043207430000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 222         49043207450000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 223         49043207460000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 224         49043207470000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 225         49043207490000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 226         49043207500000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 227         49043207480000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 228         49043207630000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 229         49043207650000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 230         49043207660000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 231         49043207670000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 232         49043207680000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 233         49043207690000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 234         49043207740000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 235         49043207730000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 236         49043207700000      COTTONWOOD CREEK      BEPCO         PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION             WI            NRI(1)        ORI(2)
- ------   -----------------------             --------             --            ------        ------
<S>      <C>                                 <C>                 <C>           <C>           <C>
         COTTONWOOD CREEK UNIT 199           SE  NE 18 47N 90W   .91098801     .76577372     .00004650
         COTTONWOOD CREEK UNIT 200           SE  NE 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 201           SE  NW 13 47N 92W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 208           SE  NW 16 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 210           SE  NW 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 211           SW  SW 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 212           SE  SW 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 213           SE  SE 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 214           SE  SW 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 215           SE  NW 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 216           NE  NE 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 217           SE  NE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 218           SE  NW 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 219           SW  SW 09 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 220           SE  SE 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 221           SE  SW 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 222           NW  NE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 223           NE  SE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 224           SW  SE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 225           SW  SW 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 226           SE  NE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 227           SW  NE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 228           SW  NW 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 229           NE  NW 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 230           SE  NE 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 231           NW  SE 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 232           SE  SE 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 233           SE  SW 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 234           LOT 05 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 235           NW  NE 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 236           NE  NE 13 47N 91W   .91098801     .76677372     .00004650

</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                   Page: 6
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
  PP NO. PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
  ------ -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 237         49043207620000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 238         49043207520000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 239         49043207530000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 240         49043207710000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 241         49043207720000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 242         49043207750000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 243         49043207840300      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 244         49043207850000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 245         49043207980000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 246         49043207950000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 247         49043207960000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 248         49043207970000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 249         49043208010000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 250         49043207990000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 251         49043208050000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 252         49043207770000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 253         49043207780000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 254         49043207790000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 255         49043207800000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 256         49043207810000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 257         49043207820000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 258         49043208000000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 259         49043208020000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 260         49043208030000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 261         49043207860000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 263         49043207880000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 267         49043208190000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 269         49043208210000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 271         49043208110000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 272         49043208150000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 273         49043208120000      COTTONWOOD CREEK      BEPCO        PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION            WI            NRI(1)        ORI(2)
- ------   -----------------------             --------            --            ------        ------
<S>      <C>                                 <C>                <C>           <C>           <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 237           NE NE 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 238           NW SW 33 48N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 239           SW NE 08 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 240           SW SE 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 241           SE NW 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 242           SE NW 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 243           SE SE 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 244           SW SE 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 245           NE SE 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 246           SW NE 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 247           SE NW 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 248           NE NE 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 249           NE NW 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 250           NE NE 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 251           SE NE 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 252           SW SW 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 253           NW NE 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 254           NE NE 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 255           SE NE 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 256           SW NW 20 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 257           SE NW 20 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 258           SW SE 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 259           SW SE 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 260           NW SE 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 261           NW SW 09 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 263           SW SE 32 48N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 267           NW NE 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 269           SW NW 26 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 271           NE NW 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 272           SE SE 02 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 273           NE NW 12 47N 91W   .91098801     .76677372     .00004650
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 7

<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                STATUS
  PP NO. PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR  01/01/98
  ------ -----------------------           ---                 -----                 --------  --------
<S>      <C>                               <C>                 <C>                   <C>       <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 274         49043208130000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 275         49043208140000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 276         49043208170000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 277         49043208080000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 278         49043208090000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 279         04043208060000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 280         49043208100000      COTTONWOOD CREEK      BEPCO        PRD

1277602  COTTONWOOD CREEK UNIT - TENSLP
         TENSLEEP UNIT 065                 49043053000000      COTTONWOOD CREEK      BEPCO        PRD
         TENSLEEP UNIT 110                 49043202070000      COTTONWOOD CREEK      BEPCO        PRD
         TENSLEEP UNIT 117                 49043202190000      COTTONWOOD CREEK      BEPCO        PRD
         TENSLEEP UNIT 119                 49043202310000      COTTONWOOD CREEK      BEPCO        PRD

1277604  COTTONWOOD CREEK UNIT WELL#189
         COTTONWOOD CREEK NPA 189          49043206400000      COTTONWOOD CREEK      BEPCO        PRD

1277605  COTTONWOOD CREEK UNIT WELL#190
         COTTONWOOD CREEK NPA 190          49043206410000      COTTONWOOD CREEK      BEPCO        PRD

1277606  COTTONWOOD CREEK UNIT WELL #56
         COTTONWOOD CREEK NPA 056          49043053510000      COTTONWOOD CREEK      BEPCO        TA

1277608  COTTONWOOD CREEK UNIT WELL #76
         COTTONWOOD CREEK NPA 076          49043052800000      COTTONWOOD CREEK      BEPCO        TA

1277610  COTTONWOOD CREEK UNIT WELL #85
         COTTONWOOD CREEK NPA 085          49043051850000      COTTONWOOD CREEK      BEPCO        TA

1277611  COTTONWOOD CREEK UNIT WELL#197
         COTTONWOOD CREEK NPA 197          49043206440000      COTTONWOOD CREEK      BEPCO        TA

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION             WI            NRI(1)        ORI(2)
- ------   -----------------------             --------             --            ------        ------
<S>      <C>                                 <C>                <C>           <C>           <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 274           SE NE 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 275           NE SW 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 276           NE NW 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 277           NW SE 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 278           NW SE 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 279           NE NW 16 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 280           NW NE 16 47N 90W   .91098801     .76677372     .00004650

1277602  COTTONWOOD CREEK UNIT - TENSLP
         TENSLEEP UNIT 065                   NW NE 07 47N 90W   1.00000000    .83746144     .00000000
         TENSLEEP UNIT 110                   SW NE 07 47N 90W   1.00000000    .83746144     .00000000
         TENSLEEP UNIT 117                   NW SE 07 47N 90W   1.00000000    .83746144     .00000000
         TENSLEEP UNIT 119                   NE NW 07 47N 90W   1.00000000    .83746144     .00000000

1277604  COTTONWOOD CREEK UNIT WELL#189
         COTTONWOOD CREEK NPA 189            NW SE 07 47N 91W   1.00000000    .82500000     .00000000

1277605  COTTONWOOD CREEK UNIT WELL#190
         COTTONWOOD CREEK NPA 190            NW NW 08 47N 91W   1.00000000    .82500000     .00000000

1277606  COTTONWOOD CREEK UNIT WELL #56
         COTTONWOOD CREEK NPA 056            NW SW 32 48N 91W    .91956760    .80462150     .00000000

1277608  COTTONWOOD CREEK UNIT WELL #76
         COTTONWOOD CREEK NPA 076            NW SW 08 47N 91W    .92203300    .67747480     .00000000

1277610  COTTONWOOD CREEK UNIT WELL #85
         COTTONWOOD CREEK NPA 085            NW NW 27 47N 91W    .91328560    .73088980     .00000000

1277611  COTTONWOOD CREEK UNIT WELL#197
         COTTONWOOD CREEK NPA 197            NW SE 09 47N 90W   1.00000000    .81500000     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.

                                                                        Page: 8
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                  OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                  --------   --------
<S>      <C>                               <C>                 <C>                    <C>        <C>
1277613  COTTONWOOD CREEK UNIT - FRONTIER
         COTTONWOOD CREEK UNIT 209         49043202580000      COTTONWOOD CREEK UNIT    BEPCO       TA

1277614  COTTONWOOD CREEK NPA - #109
         COTTONWOOD CREEK NPA 109          49043202050000      COTTONWOOD CREEK UNIT    BEPCO       TA

1277617  COTTONWOOD CREEK UNIT #262
         COTTONWOOD CREEK NPA 262          49043207870000      COTTONWOOD CREEK         BEPCO       PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION            WI            NRI(1)        ORI(2)
- ------   -----------------------             --------            --            ------        ------
<S>      <C>                                 <C>                <C>           <C>           <C>
1277613  COTTONWOOD CREEK UNIT - FRONTIER
         COTTONWOOD CREEK UNIT 209           NE NW 8  47N 90W  .00000000     .00000000     .00000000

1277614  COTTONWOOD CREEK NPA - #109
         COTTONWOOD CREEK NPA 109            NW SE 17 47N 91W  .91098801     .76677372     .00004650

1277617  COTTONWOOD CREEK UNIT #262
         COTTONWOOD CREEK NPA 262            SE SW 05 47N 91W  .91000750     .75075619     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 9

<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK FIELD EXTENSION (PHOSPHORIA) UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1196001  COTTONWOOD CREEK EXT UNIT
         CC EXTENSION UNIT 1-1             49043201540000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 11-1            49043201700000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 14-1            49043201760000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 16-1            49043201410000      COTTONWOOD CREEK      BEPCO         PA
         CC EXTENSION UNIT 16-1X           49043207230000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 18-1            49043056030000      COTTONWOOD CREEK      BEPCO         PA
         CC EXTENSION UNIT 19-1            49043201490000      COTTONWOOD CREEK      BEPCO         PA
         CC EXTENSION UNIT 19-1X           49043206170000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 20-1            49043201500000      COTTONWOOD CREEK      BEPCO         PA
         CC EXTENSION UNIT 20-1X           49043207240000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 21-1            49043201740000      COTTONWOOD CREEK      BEPCO         PA
         CC EXTENSION UNIT 22-1            49043201840000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 23-1            49043201860000      COTTONWOOD CREEK      BEPCO         PA
         CC EXTENSION UNIT 24-1            49043200080000      COTTONWOOD CREEK      BEPCO         PA
         CC EXTENSION UNIT 26-1            49043206280000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 27-1            49043206270000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 28-1            49043206260000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 29-1            49043207920000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 3-1             49043051750000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 30-1            49043208160000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 31-1            49043208220000      COTTONWOOD CREEK      BEPCO         PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION                 WI            NRI(1)        ORI(2)
- ------   -----------------------             --------                 --            ------        ------
<S>      <C>                                 <C>                      <C>           <C>           <C>
 1196001 COTTONWOOD CREEK EXT UNIT
         CC EXTENSION UNIT 1-1               LOT  5    01  46N  91W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 11-1              NW   SE   31  47N  90W   .96870790     .81103222     .00061500
         CC EXTENSION UNIT 14-1              LOT  14   06  46N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 16-1              NW   SW   31  47N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 16-1X             LOT  7    31  47N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 18-1              NE   SW   25  47N  91W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 19-1              LOT  12   06  46N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 19-1X             LOT  13   06  46N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 20-1              LOT  20   06  46N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 20-1X             LOT  18   06  46N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 21-1              SW   SW   32  47N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 22-1              SW   NW   32  47N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 23-1              SW   NE   31  47N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 24-1              NW   NE   36  47N  91W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 26-1              SE   SW   25  47N  91W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 27-1              LOT  12   06  46N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 28-1              SE   SW   31  47N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 29-1              NW   SW   25  47N  91W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 3-1               SW   SW   29  47N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 30-1              SE   SE   26  47N  91W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 31-1              LOT  08   31  47N  90W   .96870790     .81103222     .00061900

</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 1
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

NO WATER CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1252302  NO WATER CREEK UNIT
         NO WATER CREEK UNIT 11            49043200970000      NO WATER CREEK        BEPCO         TA
         NO WATER CREEK UNIT 12            49043201100000      NO WATER CREEK        BEPCO         TA
         NO WATER CREEK UNIT 14            49043201330000      NO WATER CREEK        BEPCO         TA
         NO WATER CREEK UNIT 17            49043207640000      NO WATER CREEK        BEPCO         PRD
         NO WATER CREEK UNIT 18            49043207930000      NO WATER CREEK        BEPCO         PRD
         NO WATER CREEK UNIT 19            49043208260000      NO WATER CREEK        BEPCO         PRD
         NO WATER CREEK UNIT 2             49043200280000      NO WATER CREEK        BEPCO         PA
         NO WATER CREEK UNIT 20            49043208250000      NO WATER CREEK        BEPCO         PRD
         NO WATER CREEK UNIT 3             49043200450000      NO WATER CREEK        BEPCO         PA
         NO WATER CREEK UNIT 5             49043200530000      NO WATER CREEK        BEPCO         PRD
         NO WATER CREEK UNIT 6             49043200640000      NO WATER CREEK        BEPCO         TA
         NO WATER CREEK UNIT 7             49043200690000      NO WATER CREEK        BEPCO         TA
         NO WATER CREEK UNIT 9             49043200810000      NO WATER CREEK        BEPCO         PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION              WI            NRI(1)        ORI(2)
- ------   -----------------------             --------              --            ------        ------
<S>      <C>                                 <C>                  <C>           <C>           <C>
1252302  NO WATER CREEK UNIT
         NO WATER CREEK UNIT 11              SW   NW 05 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 12              NW   SE 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 14              NE   SW 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 17              LOT  16 05 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 18              LOT  13 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 19              LOT  11 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 2               LOT  13 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 20              SE   NW 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 3               LOT  22 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 5               LOT  16 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 6               LOT  19 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 7               SW   SE 31 47N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 9               LOT  09 05 46N 91W   .94441730     .78727357     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 1
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

SLICK CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------  -----------------------            ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1252208  SLICK CREEK UNIT (PHOSPHORIA)
         SLICK CREEK H20 INJ #2            49043050020000      SLICK CREEK           BEPCO         DAI
         SLICK CREEK PHOSPHORIA 02         49043050020000      SLICK CREEK           BEPCO         TA
         SLICK CREEK PHOSPHORIA 03         49043051620000      SLICK CREEK           BEPCO         PA
         SLICK CREEK PHOSPHORIA 05         49043051700000      SLICK CREEK           BEPCO         PA
         SLICK CREEK PHOSPHORIA 06         49043051680000      SLICK CREEK           BEPCO         PA
         SLICK CREEK PHOSPHORIA 07         49043051660000      SLICK CREEK           BEPCO         PA
         SLICK CREEK PHOSPHORIA 1          49043051670000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK PHOSPHORIA 10         49043201520000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK PHOSPHORIA 11         49043201530000      SLICK CREEK           BEPCO         PA
         SLICK CREEK PHOSPHORIA 12         49043201580000      SLICK CREEK           BEPCO         PA
         SLICK CREEK PHOSPHORIA 21         49043210990000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK PHOSPHORIA 22         49043202250000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK PHOSPHORIA 30         49043205330000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK PHOSPHORIA 34-43      49043206530000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK PHOSPHORIA 35-31      49043206360000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK PHOSPHORIA 4          49043051610000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK PHOSPHORIA 8          49043051640000      SLICK CREEK           BEPCO         TA

1252209  SLICK CREEK UNIT (FRONTIER)
         SLICK CREEK FRONTIER 13           49043201630000      SLICK CREEK           BEPCO         PA
         SLICK CREEK FRONTIER 15           49043201640000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK FRONTIER 19           49043201690000      SLICK CREEK           BEPCO         PA
         SLICK CREEK FRONTIER 20           49043201670000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK FRONTIER 8            49043051640000      SLICK CREEK           BEPCO         PA

1252210  SLICK CREEK UNIT (MUDDY)
         SLICK CREEK MUDDY 06              49043051680000      SLICK CREEK           BEPCO         PA
         SLICK CREEK MUDDY 07              49043051660000      SLICK CREEK           BEPCO         PA
         SLICK CREEK MUDDY 11              49043201530000      SLICK CREEK           BEPCO         PA
         SLICK CREEK MUDDY 16              49043201650000      SLICK CREEK           BEPCO         PA

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION             WI            NRI(1)        ORI(2)
- ------   -----------------------             --------             --            ------        ------
<S>      <C>                                 <C>                 <C>           <C>           <C>
1252208  SLICK CREEK UNIT (PHOSPHORIA)
         SLICK CREEK H20 INJ #2              SE  NW 34 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 02           SE  NW 34 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 03           LOT 8  02 46N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 05           SE  NW 35 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 06           SE  NW 33 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 07           NE  SE 33 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 1            SE  NE 32 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 10           SE  SW 35 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 11           SE  SE 32 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 12           NE  SW 32 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 21           NW  NE 02 46N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 22           NE  NE 34 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 30           NE  SW 33 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 34-43        SE  NE 34 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 35-31        NW  SE 35 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 4            LOT 8  03 46N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 8            SW  SE 34 47N 92W   1.00000000    .86266071     .00054626

1252209  SLICK CREEK UNIT (FRONTIER)
         SLICK CREEK FRONTIER 13             NW  SE 34 47N 92W   1.00000000    .86500050     .00103100
         SLICK CREEK FRONTIER 15             LOT 8  02 46N 92W   1.00000000    .86500050     .00103100
         SLICK CREEK FRONTIER 19             NW  SE 33 47N 92W   1.00000000    .86500050     .00103100
         SLICK CREEK FRONTIER 20             NW  SW 35 47N 92W   1.00000000    .86500050     .00103100
         SLICK CREEK FRONTIER 8              SW  SE 34 47N 92W   1.00000000    .86500050     .00103100

1252210  SLICK CREEK UNIT (MUDDY)
         SLICK CREEK MUDDY 06                SE  NW 33 47N 92W   .00000000     .00000000     .00000000
         SLICK CREEK MUDDY 07                NE  SE 33 47N 92W   .00000000     .00000000     .00000000
         SLICK CREEK MUDDY 11                SE  SE 32 47N 92W   .00000000     .00000000     .00000000
         SLICK CREEK MUDDY 16                NE  SW 32 47N 92W   .00000000     .00000000     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 1
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

SLICK CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>

1252210  SLICK CREEK UNIT (MUDDY)
         SLICK CREEK MUDDY 17              49043201660000      SLICK CREEK             BEPCO       PA

SLICK CREEK UNIT

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION                 WI            NRI(1)        ORI(2)
- ------   -----------------------             --------                 --            ------        ------
<S>      <C>                                 <C>                     <C>           <C>           <C>
1252210  SLICK CREEK UNIT (MUDDY)
         SLICK CREEK MUDDY 17                LOT 8 03 46N 92W        .00000000     .00000000     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 2
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

SOUTH FRISBY UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1252214  SOUTH FRISBY UNIT
         SOUTH FRISBY 2                    49043202040000      SOUTH FRISBY          BEPCO      PRD
         SOUTH FRISBY 24-33                49043206390000      SOUTH FRISBY          BEPCO      PRD
         SOUTH FRISBY 3                    49043202350000      SOUTH FRISBY          BEPCO      TA
         SOUTH FRISBY 4                    49043202600000      SOUTH FRISBY          BEPCO      PA
         SOUTH FRISBY 6                    49043202950000      SOUTH FRISBY          BEPCO      PRD
         SOUTH FRISBY 7                    49043203940000      SOUTH FRISBY          BEPCO      PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME            LOCATION                 WI            NRI(1)        ORI(2)
- ------   -----------------------            --------                 --            ------        ------
<S>      <C>                                <C>                      <C>           <C>           <C>
1252214  SOUTH FRISBY UNIT
         SOUTH FRISBY 2                     NW SE 24 47N 92W         1.00000000    .86004334     .00000000
         SOUTH FRISBY 24-33                 SE SE 24 47N 92W         1.00000000    .86004334     .00000000
         SOUTH FRISBY 3                     SE NW 24 47N 92W         1.00000000    .86004334     .00000000
         SOUTH FRISBY 4                     NE NE 25 47N 92W         1.00000000    .86004334     .00000000
         SOUTH FRISBY 6                     LOT 9 30 47N 91W         1.00000000    .86004334     .00000000
         SOUTH FRISBY 7                     SE NW 30 47N 91W         1.00000000    .86004334     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 1
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

NON-UNITIZED ASSETS (COOP)

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1161201  COTTONWOOD CREEK FEDERAL
         COTTONWOOD CREEK 35-1             49043203730000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK 35-44            49043205970000      COTTONWOOD CREEK      BEPCO        PRD

1161202  COTTONWOOD CREEK STATE
         COTTONWOOD CREEK 36-1             49043204090000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK 36-24            49043205690000      COTTONWOOD CREEK      BEPCO        PRD

1161203  COTTONWOOD CREEK FEDERAL #35-2
         COTTONWOOD CREEK 35-2             49043204050000      COTTONWOOD CREEK      BEPCO        PRD

1161204  COTTONWOOD CREEK FEDERAL #35-3
         COTTONWOOD CREEK 35-3             49043204020000      COTTONWOOD CREEK      BEPCO        PRD

1161205  COTTONWOOD CREEK FEDERAL #2-1
         COTTONWOOD CREEK 2-1              49043204260000      COTTONWOOD CREEK      BEPCO        PRD

1161207  COTTONWOOD CREEK FEDERAL #2-34
         COTTONWOOD CREEK 2-34             49043204730000      COTTONWOOD CREEK      BEPCO        PRD

1161212  COTTONWOOD CREEK FEDERAL #26-23
         COTTONWOOD CREEK 26-23            49043206250000      COTTONWOOD CREEK      BEPCO        PRD

1161213  COTTONWOOD CREEK FEDERAL #21-23
         COTTONWOOD CREEK 21-23            49043206500000      COTTONWOOD CREEK      BEPCO        PRD

1161214  COTTONWOOD CREEK FEDERAL #28-41
         COTTONWOOD CREEK 28-41            49043206450000      COTTONWOOD CREEK      BEPCO        TA

1161215  COTTONWOOD CREEK FEDERAL #26-21
         COTTONWOOD CREEK 26-21            49043206510000      COTTONWOOD CREEK      BEPCO        PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION            WI            NRI(1)        ORI(2)
- ------   -----------------------             --------            --            ------        ------
<S>      <C>                                 <C>                <C>           <C>           <C>
1161201  COTTONWOOD CREEK FEDERAL
         COTTONWOOD CREEK 35-1               NW NE 35 47N 91W   1.00000000    .81250000     .00000000
         COTTONWOOD CREEK 35-44              NE NE 35 47N 91W   1.00000000    .81250000     .00000000

1161202  COTTONWOOD CREEK STATE
         COTTONWOOD CREEK 36-1               SW NW 36 47N 91W   1.00000000    .81250000     .00000000
         COTTONWOOD CREEK 36-24              NE SW 36 47N 91W   1.00000000    .81250000     .00000000

1161203  COTTONWOOD CREEK FEDERAL #35-2
         COTTONWOOD CREEK 35-2               NW NW 35 47N 91W   1.00000000    .81562500     .00000000

1161204  COTTONWOOD CREEK FEDERAL #35-3
         COTTONWOOD CREEK 35-3               NW SE 35 47N 91W   1.00000000    .81250000     .00000000

1161205  COTTONWOOD CREEK FEDERAL #2-1
         COTTONWOOD CREEK 2-1                LOT 11 2 46N 91W   1.00000000    .81250000     .00000000

1161207  COTTONWOOD CREEK FEDERAL #2-34
         COTTONWOOD CREEK 2-34               NE SE 2  46N 91W   1.00000000    .82500000     .00000000

1161212  COTTONWOOD CREEK FEDERAL #26-23
         COTTONWOOD CREEK 26-23              SE SW 26 47N 91W   1.00000000    .70312500     .00187500

1161213  COTTONWOOD CREEK FEDERAL #21-23
         COTTONWOOD CREEK 21-23              SE SW 21 47N 91W   1.00000000    .80937500     .06562500

1161214  COTTONWOOD CREEK FEDERAL #28-41
         COTTONWOOD CREEK 28-41              NW NE 28 47N 91W   1.00000000    .73125000     .01875000

1161215  COTTONWOOD CREEK FEDERAL #26-21
         COTTONWOOD CREEK 26-21              NW SW 26 47N 91W   1.00000000    .71290000     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 1
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

NON-UNITIZED ASSETS (CO-OP)

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1161217  KNISLEY FEDERAL #1
         KNISELY FEDERAL #1                49043051760000      COTTONWOOD CREEK      BEPCO        PRD

1252201  EARL SCHRANTZ USA
         SCHRANTZ USA 1                    49043051730000      COTTONWOOD CREEK      BEPCO        PRD
         SCHRANTZ USA 3                    49043200500000      COTTONWOOD CREEK      BEPCO        PRD
         SCHRANTZ USA 4                    49043200510000      COTTONWOOD CREEK      BEPCO        PA
         SCHRANTZ USA 5                    49043208240000      COTTONWOOD CREEK      BEPCO        PRD

1252202  TOLMAN USA
         TOLMAN USA 2                      49043200330000      COTTONWOOD CREEK      BEPCO        PRD
         TOLMAN USA 3                      49043200590000      COTTONWOOD CREEK      BEPCO        PRD

1252203  CALDWELL USA #1-7
         CALDWELL USA 1-7                  49043203830000      COTTONWOOD CREEK      BEPCO        PRD

1252204  FAURE USA
         USA FAURE 1                       49043200430000      RATTLESNAKE           BEPCO        PRD
         USA FAURE 2                       49043200570000      RATTLESNAKE           BEPCO        PA
         USA FAURE 4                       49043201020000      RATTLESNAKE           BEPCO        PRD

1252205  FAURE "A" USA
         USA FAURE A2-2                    49043203840000      RATTLESNAKE           BEPCO        PRD

1252206  LACOY FEDERAL
         LACOY FEDERAL 13-1                49043200770000      RATTLESNAKE           BEPCO        PRD

1252207  BEARD FEDERAL
         BEARD FEDERAL 1                   49043201090000      RATTLESNAKE           BEPCO        PA

1252211  ROME FEDERAL
         ROME FEDERAL 1                    49043201720000      SLICK CREEK           BEPCO        PRD

<CAPTION>
PP NO.  PROPERTY NAME/WELL NAME            LOCATION             WI            NRI(1)        ORI(2)
- ------   -----------------------            --------            --            ------        ------
<S>      <C>                                <C>                <C>           <C>           <C>
1161217  KNISLEY FEDERAL #1
         KNISELY FEDERAL #1                 NW SE 27 47N 91W   1.00000000    .71500000     .00000000

1252201  EARL SCHRANTZ USA
         SCHRANTZ USA 1                     NW NE 33 47N 91W   1.00000000    .79375000     .05035164
         SCHRANTZ USA 3                     SW SE 32 47N 91W   1.00000000    .79375000     .05035164
         SCHRANTZ USA 4                     SW SW 32 47N 91W   1.00000000    .79375000     .05035164
         SCHRANTZ USA 5                     NE SW 32 47N 91W   1.00000000    .79375000     .05035164

1252202  TOLMAN USA
         TOLMAN USA 2                       NW SW 28 47N 91W   1.00000000    .87500000     .00000000
         TOLMAN USA 3                       NW NW 28 47N 91W   1.00000000    .87500000     .00000000

1252203  CALDWELL USA #1-7
         CALDWELL USA 1-7                   LO 12 07 47N  91W   .55480654     .47179217     .00000000

1252204  FAURE USA
         USA FAURE 1                        NW NW 11 47N 92W   1.00000000    .82500000     .00000000
         USA FAURE 2                        NW SE 11 47N 92W   1.00000000    .82500000     .00000000
         USA FAURE 4                        NW SW 11 47N 92W   1.00000000    .82500000     .00000000

1252205  FAURE "A" USA
         USA FAURE A2-2                     NE NE 02 47N 92W   1.00000000    .82500000     .00000000

1252206  LACOY FEDERAL
         LACOY FEDERAL 13-1                 NW NW 13 47N 92W   1.00000000    .82500000     .00000000

1252207  BEARD FEDERAL
         BEARD FEDERAL 1                    NW NW 12 47N 92W   1.00000000    .84900000     .00000000

1252211  ROME FEDERAL
         ROME FEDERAL 1                     SE SE 02 46N 92W   1.00000000    .81250000     .06250000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 2
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

NON-UNITIZED ASSETS (CO-OP)

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>

1252213  NEIBER II UNIT (TENSLEEP)
         NEIBER UNIT II-I                  49043202610000      NEIBER DOME           BEPCO         PRD

1252215  SOUTH FRISBY LACOY FED #5 & #8
         SOUTH FRISBY 5                    49043202630000      SOUTH FRISBY          BEPCO         PRD
         SOUTH FRISBY 8                    49043203950000      SOUTH FRISBY          BEPCO         PRD

1252217  CALDWELL USA #20
         CALDWELL 1-20                     49043203960000      COTTONWOOD CREEK      BEPCO         PRD
         CALDWELL 2-20                     49043203990000      COTTONWOOD CREEK      BEPCO         PRD

1252218  SMITH USA #30
         SMITH USA 1-30                    49043203620000      SOUTH FRISBY          BEPCO         PRD

1252219  TENNECO FEDERAL #23
         TENNECO FEDERAL 1-23              49043204960000      SOUTH FRISBY          BEPCO         PRD

1252220  COTTONWOOD CREEK FEDERAL #19
         COTTONWOOD CREEK FED 19-1         49043203520000      SOUTH FRISBY          BEPCO         PRD

1252328  NO WATER CREEK #4
         NO WATER CREEK 4                  49043200540000      NO WATER CREEK        BEPCO         PA

1252329  NO WATER CREEK #8
         NO WATER CREEK 8                  49043201180000      NO WATER CREEK        BEPCO         TA

1252330  NO WATER CREEK #13
         NO WATER CREEK 13                 49043201230000      NO WATER CREEK        BEPCO         TA

1252331  NO WATER CREEK #15
         NO WATER CREEK 15                 49043201290000      NO WATER CREEK        BEPCO         TA

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION             WI            NRI(1)        ORI(2)
- ------   -----------------------             --------             --            ------        ------
<S>      <C>                                 <C>                 <C>           <C>           <C>
1252213  NEIBER II UNIT (TENSLEEP)
         NEIBER UNIT II-I                    LOT 15 19 45N 92W   .76909143     .67295528     .00000000

1252215  SOUTH FRISBY LACOY FED #5 & #8
         SOUTH FRISBY 5                      LOT 9  19 47N 91W   1.00000000    .85500000     .00000000
         SOUTH FRISBY 8                      NE  NE 24 47N 92W   1.00000000    .85500000     .00000000

1252217  CALDWELL USA #20
         CALDWELL 1-20                       SW  SW 20 47N 91W   1.00000000    .84000000     .00000000
         CALDWELL 2-20                       SW  NW 20 47N 91W   1.00000000    .84000000     .00000000

1252218  SMITH USA #30
         SMITH USA 1-30                      NE  NE 30 47N 91W   1.00000000    .84750000     .00000000

1252219  TENNECO FEDERAL #23
         TENNECO FEDERAL 1-23                SE  NE 23 47N 92W   1.00000000    .87500000     .00000000

1252220  COTTONWOOD CREEK FEDERAL #19
         COTTONWOOD CREEK FED 19-1           NW  SE 19 47N 91W   1.00000000    .85250000     .00000000

1252328  NO WATER CREEK #4
         NO WATER CREEK 4                    LOT 9  31 47N 91W   1.00000000    .82500000     .00000000

1252329  NO WATER CREEK #8
         NO WATER CREEK 8                    SW  NE 31 47N 91W   1.00000000    .82500000     .00000000

252330   NO WATER CREEK #13
         NO WATER CREEK 13                   LOT 11 05 46N 91W   1.00000000    .84500000     .00000000

1252331  NO WATER CREEK #15
         NO WATER CREEK 15                   SW  NE 05 46N 91W   1.00000000    .84500000     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 3
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

NON-UNITIZED ASSETS (CO-OP)

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>

1305001  CHAMBERS STATE
         CHAMBERS STATE #1-36              49043203040000      RATTLESNAKE           BEPCO         PRD
         CHAMBERS STATE #2-36              49043203140000      RATTLESNAKE           BEPCO         PRD
         CHAMBERS STATE #3-36              49043203210000      RATTLESNAKE           BEPCO         PA
         CHAMBERS STATE #4-36              49043207940000      RATTLESNAKE           BEPCO         PRD
         CHAMBERS STATE #5-36              49043208200000      RATTLESNAKE           BEPCO         PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME            LOCATION            WI            NRI(1)        ORI(2)
- ------   -----------------------            --------            --            ------        ------
<S>      <C>                                <C>                <C>           <C>           <C>
1305001  CHAMBERS STATE
         CHAMBERS STATE #1-36               SW SW 36 48N 92W   1.00000000    .84500000     .00000000
         CHAMBERS STATE #2-36               SW SE 36 48N 92W   1.00000000    .84500000     .00000000
         CHAMBERS STATE #3-36               SW NW 36 48N 92W   1.00000000    .84500000     .00000000
         CHAMBERS STATE #4-36               NE SW 36 48N 92W   1.00000000    .84500000     .00000000
         CHAMBERS STATE #5-36               SW NE 36 48N 92W   1.00000000    .84500000     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 4

<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

NON-UNITIZED ASSETS (OSO)

<TABLE>
<CAPTION>
                                                                                                                  STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR                    01/01/98
- ------   -----------------------           ---                 -----                 --------                    --------
<S>      <C>                               <C>                 <C>                   <C>                         <C>
1252303  COSEKA FEDERAL #18-3 & #18-4
         ALTUS GOVERNMENT 18-3             49043203460000      COTTONWOOD CREEK      WAGNER & BROWN, LTD.          PRD
         ALTUS GOVERNMENT 18-4             49043205420000      COTTONWOOD CREEK      WAGNER & BROWN, LTD.          PRD

1252304  GOVERNMENT 29-1
         GOVERNMENT 29-1                   49043202960000      COTTONWOOD CREEK      SAMSON RESOURCES CORP         PA

1252305  COSEKA FEDERAL #13-1, 2 & 3
         ALTUS GOVERNMENT 13-1             49043203310000      COTTONWOOD CREEK      WAGNER & BROWN, LTD.          SI
         ALTUS GOVERNMENT 13-2             49043203470000      COTTONWOOD CREEK      WAGNER & BROWN, LTD.          SI
         ALTUS GOVERNMENT 13-3             49043205560000      COTTONWOOD CREEK      WAGNER & BROWN, LTD.          SI

1252306  COSEKA FEDERAL #18-1 & #18-5
         ALTUS GOVERNMENT 18-1             49043203200000      COTTONWOOD CREEK      WAGNER & BROWN, LTD.          PRD
         ALTUS GOVERNMENT 18-5             49043205740000      COTTONWOOD CREEK      WAGNER & BROWN, LTD.          PRD

1252307  BRENT FEDERAL #2 & #3 FED #32-1
         BRENT FEDERAL 2                   49043203920000      COTTONWOOD CREEK      BRENT EXPLORATION, INC.       SI
         BRENT FEDERAL 3                   49043203930000      COTTONWOOD CREEK      BRENT EXPLORATION, INC.       SI
         FEDERAL 32-1                      49043205090000      COTTONWOOD CREEK      BRENT EXPLORATION, INC.       SI

1252308  MARTIN FEDERAL #29-2
         MARTIN FEDERAL 29-2               49043203300000      COTTONWOOD CREEK      SAMSON RESOURCES CORP         PRD

1252309  GOVERNMENT #14-2
         GOVERNMENT #14-2                  49043202920000      RATTLESNAKE           SAMSON RESOURCES CORP         SI

1252310  TENNECO GOVERNMENT #1-1 & 1-2
         TENNECO GOVERNMENT 1-2            49043202940000      COTTONWOOD CREEK      SAMSON RESOURCES CORP         SI

1252311  GOVERNMENT #27-1
         GOVERNMENT 27-1                   49043202810000      COTTONWOOD CREEK      MARKUS PRODUCTION, INC.       PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME            LOCATION               WI            NRI(1)        ORI(2)
- ------   -----------------------            --------               --            ------        ------
<S>      <C>                                <C>                   <C>           <C>           <C>
1252303  COSEKA FEDERAL #18-3 & #18-4
         ALTUS GOVERNMENT 18-3              SE  NW 18 47N 91W     .00000000     .00000000     .09000000
         ALTUS GOVERNMENT 18-4              NW  NW 18 47N 91W     .00000000     .00000000     .09000000

1252304  GOVERNMENT 29-1
         GOVERNMENT 29-1                    SW  SW 29 47N 91W     .00000000     .00000000     .00000000

1252305  COSEKA FEDERAL #13-1, 2 & 3
         ALTUS GOVERNMENT 13-1              NE  NE 13 47N 92W     .00000000     .00000000     .09500000
         ALTUS GOVERNMENT 13-2              NE  SE 13 47N 92W     .00000000     .00000000     .09500000
         ALTUS GOVERNMENT 13-3              NW  NE 13 47N 92W     .00000000     .00000000     .09500000

1252306  COSEKA FEDERAL #18-1 & #18-5
         ALTUS GOVERNMENT 18-1              Lot 12 18 47N 91W     .00000000     .00000000     .08874760
         ALTUS GOVERNMENT 18-5              NE  SW 18 47N 91W     .00000000     .00000000     .08874760

1252307  BRENT FEDERAL #2 & #3 FED #32-1
         BRENT FEDERAL 2                    SW  NE 32 47N 91W     .00000000     .00000000     .09472400
         BRENT FEDERAL 3                    SW  NW 33 47N 91W     .00000000     .00000000     .09472400
         FEDERAL 32-1                       NE  NE 32 47N 91W     .00000000     .00000000     .09472400

1252308  MARTIN FEDERAL #29-2
         MARTIN FEDERAL 29-2                SW  NW 29 47N 91W     .04848480     .03636360     .09000000

1252309  GOVERNMENT #14-2
         GOVERNMENT #14-2                   NW  NW 14 47N 92W     .00000000     .00000000     .06250000

1252310  TENNECO GOVERNMENT #1-1 & 1-2
         TENNECO GOVERNMENT 1-2             SW  NW 01 47N 92W     .00000000     .00000000     .01875000

1252311  GOVERNMENT #27-1
         GOVERNMENT 27-1                    SW  SW 27 47N 92W     .26666640     .19999980     .08500000

</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 1
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

NON-UNITIZED ASSETS (OSO)

<TABLE>
<CAPTION>
                                                                                                                  STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR                    01/01/98
- ------   -----------------------           ---                 -----                 --------                    --------
<S>      <C>                               <C>                 <C>                   <C>                         <C>
1252313  BRENT FEDERAL #11-1
         BRENT FEDERAL 11-1                49043204440000      COTTONWOOD CREEK      WASHAKIE ENERGIES CO. LT       PRD

1252314  BRENT FEDERAL #16-1
         BRENT FEDERAL 16-1                49043204480000      COTTONWOOD CREEK      WASHAKIE ENERGIES CO. LT       PRD

1252316  SCHETTERLY #1-30
         ALTUS SCHETTERLY 1-30             49043203630000      SOUTH FRISBY          BRENT EXPLORATION, INC.        PRD

1252317  BRENT FEDERAL #3-25
         BRENT FEDERAL 3-25                49043204330000      SOUTH FRISBY          BRENT EXPLORATION, INC.        PRD

1252318  BRENT FEDERAL 13-24
         BRENT FEDERAL 13-24               49043204600000      FRISBY SOUTH          BRENT EXPLORATION, INC.        PRD

1252319  BRENT FEDERAL 25-7
         BRENT FEDERAL 25-7                49043205360000      FRISBY SOUTH          ANDERSON MYERS                 PA

1252320  TENNECO USA #1
         TENNECO USA 1                     49043205910000      COTTONWOOD CREEK      CAROL-HOLLY OIL CORP.          PRD

1252321  GOVERNMENT #25-1
         GOVERNMENT 25-1                   49043202990000      SOUTH FORK            MARKUS PRODUCTION, INC.        PRD

1252322  GOVERNMENT #36-1
         GOVERNMENT 36-1                   49043202890000      COTTONWOOD CREEK      MARKUS PRODUCTION, INC.        SI

1252324  TENNECO USA 2
         TENNECO USA 2                     49043206080000      COTTONWOOD CREEK      WYOMING RESOURCES              PA

1252325  TENNECO USA #3
         TENNECO USA 3                     49043206230000      COTTONWOOD CREEK      CAROL-HOLLY OIL CORP.          PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME            LOCATION              WI            NRI(1)        ORI(2)
- ------   -----------------------            --------              --            ------        ------
<S>      <C>                                <C>                  <C>           <C>           <C>
1252313  BRENT FEDERAL #11-1
         BRENT FEDERAL 11-1                 NE SW 01 46N 92W     .00000000     .00000000     .05000000

1252314  BRENT FEDERAL #16-1
         BRENT FEDERAL 16-1                 SE SE 01 46N 92W     .00000000     .00000000     .05000000

1252316  SCHETTERLY #1-30
         ALTUS SATTTERLY 1-30               NE SE 30 47N 91W     .00000000     .00000000     .06500000

1252317  BRENT FEDERAL #3-25
         BRENT FEDERAL 3-25                 NE NW 25 47N 92W     .00000000     .00000000     .05000000

1252318  BRENT FEDERAL 13-24
         BRENT FEDERAL 13-24                SW SW 24 47N 92W     .00000000     .00000000     .05000000

1252319  BRENT FEDERAL 25-7
         BRENT FEDERAL 25-7                 SW NE 25 47N 92W     .00000000     .00000000     .00000000

1252320  TENNECO USA #1
         TENNECO USA 1                      SW SE 25 47N 92W     .00000000     .00000000     .10000000

1252321  GOVERNMENT #25-1
         GOVERNMENT 25-1                    SE NW 25 46N 92W     .00000000     .00000000     .12500000

1252322  GOVERNMENT #36-1
         GOVERNMENT 36-1                    NE NE 36 47N 92W     .26666640     .19999980     .03750000

1252324  TENNECO USA 2
         TENNECO USA 2                      SE SW 28 47N 91W     .00000000     .00000000     .00000000

1252325  TENNECO USA #3
         TENNECO USA 3                      SE NW 28 47N 91W     .12500000     .11312500     .05000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 2
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

NON-UNITIZED ASSETS (OSO)

<TABLE>
<CAPTION>
                                                                                                                  STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR                    01/01/98
- ------   -----------------------           ---                 -----                 --------                    --------
<S>      <C>                               <C>                 <C>                   <C>                         <C>

1252327  RATTLESNAKE USA #4
         RATTLESNAKE 4                     49043206330000      COTTONWOOD CREEK      CAROL-HOLLY OIL CORP.           SI

1252332  BRENT FEDERAL #1
         BRENT FEDERAL #1                  49043203910000      COTTONWOOD CREEK      BRENT EXPLORATION CO            SI

1252333  HONEY BUTTE FEDERAL #3
         HONEY BUTTE FEDERAL #3            49043203390000      RATTLESNAKE           HANSON OPERATING COMPANY        PRD

1252334  GOVERNMENT #14-1
         GOVERNMENT 14-1                   49043201140000      RATTLESNAKE           MARKUS PRODUCTION, INC.         SI

1252335  TENNECO GOVERNMENT #1-3
         TENNECO GOVERNMENT 1-3            49043203030000      COTTONWOOD CREEK      SAMSON RESOURCES CORP           PRD

1252336  TENNECO GOVERNMENT #1-4
         TENNECO GOVERNMENT 1-4            49043203010000      COTTONWOOD CREEK      SAMSON RESOURCES CORP           PRD

1252337  GOVERNMENT #28-1
         GOVERNMENT 28-1                   49043202970000      COTTONWOOD CREEK      MARKUS PRODUCTION, INC.         SI

1252338  GOVERNMENT #36-2
         GOVERNMENT 36-2                   49043203050000      COTTONWOOD CREEK      MARKUS PRODUCTION, INC.         SI

1256101  BASS FEDERAL 33-24 #1H
         #1 H BASS FEDERAL 33-24           49043207100000      MARSHALL              UNION PACIFIC RESOURCES         PRD

1288501  SAGEBUSH FEDERAL #13-25
         SAGEBUSH FED #13-25               49003208230000      SAGEBUSH              ALV COMPANY                     PRD

1288502  SAGEBUSH FEDERAL #32-26
         SAGEBUSH #32-26                   49003208270000      SAGEBUSH              ALV COMPANY                     PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME       LOCATION             WI            NRI(1)        ORI(2)
- ------   -----------------------       --------             --            ------        ------
<S>      <C>                           <C>                  <C>           <C>           <C>
1252327  RATTLESNAKE USA #4
         RATTLESNAKE 4                 SE NW 11 47N 92W     .05000000     .04245000     .00000000

1252332  BRENT FEDERAL #1
         BRENT FEDERAL #1              NE NW 31 47N 91W     .00000000     .00000000     .09000000

1252333  HONEY BUTTE FEDERAL #3
         HONEY BUTTE FEDERAL #3        SW SE 16 47N 91W     .10000000     .08350000     .00000000

1252334  GOVERNMENT #14-1
         GOVERNMENT 14-1               NW NE 14 47N 92W     .26666640     .19999978     .06250000

1252335  TENNECO GOVERNMENT #1-3
         TENNECO GOVERNMENT 1-3        SW NE 01 47N 92W     .25291700     .18652630     .01875000

1252336  TENNECO GOVERNMENT #1-4
         TENNECO GOVERNMENT 1-4        SW SE 01 47N 92W     .22736810     .16768400     .01875000

1252337  GOVERNMENT #28-1
         GOVERNMENT 28-1               SW SE 28 47N 92W     .04848480     .03636360     .08500000

1252338  GOVERNMENT #36-2
         GOVERNMENT 36-2               NE NW 36 47N 92W     .22736810     .17052610     .03750000

1256101  BASS FEDERAL 33-24 #1H
         #1 H BASS FEDERAL 33-24       SW SE 24 48N 92W     .00000000     .00000000     .03187499

1288501  SAGEBUSH FEDERAL #13-25
         SAGEBUSH FED #13-25           NW SW 25 51N 92W     .00000000     .00000000     .00830000

1288502  SAGEBUSH FEDERAL #32-26
         SAGEBUSH #32-26               SW NE 26 51N 92W     .00000000     .00000000     .04000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.

                                                                        Page: 3
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 001         49043053070000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 002         49043053230000      COTTONWOOD CREEK      BEPCO           PA
         COTTONWOOD CREEK UNIT 004         49043052760000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 005         49043052820000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 006         49043052730000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 007         49043053010000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 008         49043052860000      COTTONWOOD CREEK      BEPCO           PA
         COTTONWOOD CREEK UNIT 008X        49043207830000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 009         49043053030000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 010         49043052650000      COTTONWOOD CREEK      BEPCO           PA
         COTTONWOOD CREEK UNIT 010X        49043207190000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 011         49043052450000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 012         49043052690000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 014         49043052510000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 015         49043052460000      COTTONWOOD CREEK      BEPCO           PA
         COTTONWOOD CREEK UNIT 015X        49043207200000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 016         49043052710000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 017         49043052300000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 018         49043052870000      COTTONWOOD CREEK      BEPCO           PA
         COTTONWOOD CREEK UNIT 018X        49043207210000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 019         49043052520000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 020         49043052700000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 021         49043052530000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 022         49043052320000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 023         49043053040000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 024         49043052380000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 025         49043052400000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 026         49043052980000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 027         49043052390000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 028         49043052670000      COTTONWOOD CREEK      BEPCO           PA

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME              LOCATION            WI            NRI(1)        ORI(2)
- ------   -----------------------              --------            --            ------        ------
<S>      <C>                                  <C>                <C>           <C>           <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 001            SW SW 02 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 002            SW NE 03 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 004            SE SE 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 005            NW SW 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 006            NW NE 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 007            NW NW 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 008            NW SE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 008X           NW SE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 009            NW NE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 010            NW NW 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 010X           NW NW 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 011            NW SE 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 012            NW NE 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 014            NW SW 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 015            NW SW 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 015X           NW SW 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 016            NW NE 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 017            NW NW 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 018            NW SW 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 018X           NW SW 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 019            NW SE 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 020            NW NW 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 021            NW SE 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 022            NW NE 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 023            NW SW 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 024            NW NW 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 025            NW NE 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 026            NW NW 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 027            NW NE 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 028            NW NW 14 47N 91W   .91098801     .76677372     .00004650

</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 1
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 029         49043052490000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 030         49043052950000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 031         49043052500000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 032         49043052360000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 033         49043052480000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 034         49043052680000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 035         49043052840000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 036         49043052340000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 037         49043052970000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 038         49043052350000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 039         49043052830000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 040         49043051960000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 041         49043053160000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 042         49043052810000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 043         49043053710000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 044         49043052640000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 045         49043052960000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 046         49043052990000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 047         49043053300000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 048         49043052780000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 050         49043052660000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 051         49043052330000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 052         49043052630000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 053         49043053290000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 054         49043053520000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 055         49043053130000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 059         49043051970000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 060         49043051920000      COTTONWOOD CREEK      BEPCO           PRD
         COTTONWOOD CREEK UNIT 061         49043051940000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 062         49043051950000      COTTONWOOD CREEK      BEPCO           TA
         COTTONWOOD CREEK UNIT 063         49043051870000      COTTONWOOD CREEK      BEPCO           PRD

<CAPTION>
  PP NO. PROPERTY NAME/WELL NAME            LOCATION           WI            NRI(1)        ORI(2)
  ------ -----------------------            --------           --            ------        ------
<S>      <C>                                <C>                <C>           <C>           <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 029          NW SW 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 030          NW NW 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 031          NW SE 15 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 032          NW NW 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 033          NW SW 15 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 034          NW NE 15 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 035          NW SW 10 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 036          NW NW 22 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 037          NW NE 09 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 038          NW NE 22 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 039          NW SE 09 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 040          NW SE 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 041          NW SE 04 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 042          NW SW 05 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 043          NW NE 32 48N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 044          NW NE 16 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 045          NW NW 09 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 046          NW NW 10 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 047          NW NW 04 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 048          NW SE 08 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 050          NW NW 15 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 051          NW NE 21 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 052          NW NW 16 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 053          NW NE 04 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 054          NW SE 32 48N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 055          NW SW 04 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 059          NW SE 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 060          NW SW 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 061          NW SW 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 062          NW SE 22 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 063          NW NE 26 47N 91W   .91098801     .76677372     .00004650
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 2
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 064         49043051880000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 066         49043052940000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 067         49043052880000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 068         49043052770000      COTTONWOOD CREEK      BEPCO         PA
         COTTONWOOD CREEK UNIT 069         49043052920000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 070         49043052720000      COTTONWOOD CREEK      BEPCO         PA
         COTTONWOOD CREEK UNIT 070X        49043207170000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 071         49043052620000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 072         49043052750000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 073         49043052570000      COTTONWOOD CREEK      BEPCO         SI
         COTTONWOOD CREEK UNIT 074         49043052580000      COTTONWOOD CREEK      BEPCO         PA
         COTTONWOOD CREEK UNIT 074X        49043208070000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 075         49043052410000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 077         49043052470000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 078         49043052850000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 081         49043051860000      COTTONWOOD CREEK      BEPCO         PA
         COTTONWOOD CREEK UNIT 081A        49043206300000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 082         49043052740000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 083         49043052910000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 084         49043053020000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 086         49043052930000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 087         49043052790000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 088         49043055890000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 089         49043200180000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 090         49043200170000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 091         49043200220000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 092         49043056060000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 094         49043200090000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 095         49043200350000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 096         49043200310000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 097         49043200360000      COTTONWOOD CREEK      BEPCO         PRD

<CAPTION>
  PP NO. PROPERTY NAME/WELL NAME             LOCATION            WI            NRI(1)        ORI(2)
  ------ -----------------------             --------            --            ------        ------
<S>      <C>                                 <C>                <C>           <C>           <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 064           NW NW 25 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 066           SW NW 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 067           NW SW 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 068           SE SE 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 069           NW SW 09 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 070           NW NW 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 070X          NW NW 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 071           NW NE 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 072           NW NW 16 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 073           NW SW 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 074           NW SE 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 074X          SW SE 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 075           NW NW 20 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 077           NW SE 16 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 078           NW SE 10 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 081           NW NE 27 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 081A          NW NE 27 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 082           NW NE 16 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 083           NW SE 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 084           NW NE 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 086           NW SE 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 087           NE SW 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 088           SE SE 09 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 089           SE NW 15 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 090           SE NE 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 091           SE SE 15 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 092           SE SE 01 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 094           SE SW 01 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 095           SE SW 06 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 096           NW SW 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 097           SE SE 02 47N 91W   .91098801     .76677372     .00004650
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 3
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 098         49043200550000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 101         49043201130000      COTTONWOOD CREEK      BEPCO         PA
         COTTONWOOD CREEK UNIT 102         49043201880000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 103         49043201900000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 104         49043201520000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 105         49043201850000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 106         49043201830000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 107         49043203870000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 108         49043201970000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 111         49043202110000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 113         49043202150000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 114         49043202140000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 115         49043202170000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 116         49043202160000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 118         49043202180000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 120         49043203110000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 121         49043204450000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 122         49043204450000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 123         49043204310000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 124         49043204380000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 125         49043204300000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 126         49043204320000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 127         49043204370000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 128         49043204430000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 129         49043204590000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 130         49043204500000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 131         49043204510000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 132         49043204580000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 133         49043204570000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 134         49043204560000      COTTONWOOD CREEK      BEPCO         PA
         COTTONWOOD CREEK UNIT 134X        49043207300000      COTTONWOOD CREEK      BEPCO         PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION            WI            NRI(1)        ORI(2)
- ------   -----------------------             --------            --            ------        ------
<S>      <C>                                 <C>                <C>           <C>           <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 098           NW SE 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 101           NW NW 26 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 102           NW NE 17 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 103           SE SE 22 47N 91W   .91098601     .76677372     .00004650
         COTTONWOOD CREEK UNIT 104           SE SE 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 105           SE NE 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 106           SE SW 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 107           SE SW 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 108           SE NE 16 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 111           NE SE 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 113           SE NE 17 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 114           SE NE 27 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 115           SE NW 16 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 116           SW NW 22 47N 92W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 118           SE NW 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 120           SE NW 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 121           NW SW 05 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 122           SW SW 17 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 123           SE SE 16 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 124           SE NW 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 125           SE NW 26 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 126           SE SW 22 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 127           SE NW 22 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 128           SE SW 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 129           SE SW 09 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 130           SE NW 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 131           SE NE 26 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 132           SE SW 15 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 133           SE NE 22 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 134           SE NW 27 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 134X          SE NW 27 47N 91W   .91098801     .76677372     .00004650
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 4
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 135         49043204650000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 136         49043204630000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 139         49043204930000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 141         49043264850000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 145         49043205040000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 151         49043205680000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 156         49043205640000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 157         49043205790000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 158         49043205650000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 159         49043205660000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 160         49043205800000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 161         49043205810000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 162         49043205630000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 163         49043205670000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 165         49043205630000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 166         49043205840000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 167         49043206110000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 168         49043206050000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 169         49043206040000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 171         49043206060000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 172         49043206090000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 173         49043206130000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 174         49043206150000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 175         49043206120000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 179         49043206200000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 180         49043206210000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 182         49043206190000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 183         49043206350000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 184         49043206370000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 165         49043206380000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 186         49043206420000      COTTONWOOD CREEK      BEPCO         TA

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION            WI            NRI(1)        ORI(2)
- ------   -----------------------             --------            --            ------        ------
<S>      <C>                                 <C>                <C>           <C>           <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 135           NW SE 31 48N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 136           SW SE 07 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 139           SE NW 21 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 141           SE SW 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 145           SE SE 08 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 151           SE SE 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 156           NW NE 10 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 157           SE NW 10 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 158           SE SE 10 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 159           SE SW 10 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 160           SE NE 09 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 161           SE NW 09 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 162           SE NE 15 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 163           SE NW 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 165           SE NW 17 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 166           SE SW 08 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 167           SW SE 04 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 168           SE NE 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 169           SW SW 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 171           NE NW 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 172           NE NE 27 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 173           SE NE 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 174           SE SE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 175           SE NE 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 179           SE SW 09 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 180           SE SW 04 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 182           SE NW 04 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 183           NW NW 17 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 184           SW NW 25 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 185           NW NE 05 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 186           NW SW 17 47N 91W   .91098801     .76677372     .00004650
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 5
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>

1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 199         49043206480000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 200         49043206470000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 201         49043206460000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 208         49043206490000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 210         49043207290000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 211         49043207270000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 212         49043207280000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 213         49043207260000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 214         49043207390000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 215         49043207410000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 216         49043207420000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 217         49043207350000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 218         49043207360000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 219         49043207400000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 220         49043207370000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 221         49043207430000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 222         49043207450000      COTTONWOOD CREEK      BEPCO         TA
         COTTONWOOD CREEK UNIT 223         49043207460000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 224         49043207470000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 225         49043207490000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 226         49043207500000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 227         49043207480000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 228         49043207630000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 229         49043207650000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 230         49043207660000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 231         49043207670000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 232         49043207680000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 233         49043207690000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 234         49043207740000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 235         49043207730000      COTTONWOOD CREEK      BEPCO         PRD
         COTTONWOOD CREEK UNIT 236         49043207700000      COTTONWOOD CREEK      BEPCO         PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION             WI            NRI(1)        ORI(2)
- ------   -----------------------             --------             --            ------        ------
<S>      <C>                                 <C>                 <C>           <C>           <C>

1277601  COTTONWOOD CREEK UNIT - PHOSPH

         COTTONWOOD CREEK UNIT 199           SE  NE 18 47N 90W   .91098801     .76577372     .00004650
         COTTONWOOD CREEK UNIT 200           SE  NE 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 201           SE  NW 13 47N 92W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 208           SE  NW 16 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 210           SE  NW 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 211           SW  SW 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 212           SE  SW 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 213           SE  SE 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 214           SE  SW 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 215           SE  NW 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 216           NE  NE 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 217           SE  NE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 218           SE  NW 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 219           SW  SW 09 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 220           SE  SE 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 221           SE  SW 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 222           NW  NE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 223           NE  SE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 224           SW  SE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 225           SW  SW 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 226           SE  NE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 227           SW  NE 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 228           SW  NW 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 229           NE  NW 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 230           SE  NE 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 231           NW  SE 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 232           SE  SE 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 233           SE  SW 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 234           LOT 05 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 235           NW  NE 19 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 236           NE  NE 13 47N 91W   .91098801     .76677372     .00004650

</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                   Page: 6
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
  PP NO. PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
  ------ -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 237         49043207620000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 238         49043207520000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 239         49043207530000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 240         49043207710000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 241         49043207720000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 242         49043207750000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 243         49043207840300      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 244         49043207850000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 245         49043207980000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 246         49043207950000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 247         49043207960000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 248         49043207970000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 249         49043208010000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 250         49043207990000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 251         49043208050000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 252         49043207770000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 253         49043207780000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 254         49043207790000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 255         49043207800000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 256         49043207810000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 257         49043207820000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 258         49043208000000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 259         49043208020000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 260         49043208030000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 261         49043207860000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 263         49043207880000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 267         49043208190000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 269         49043208210000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 271         49043208110000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 272         49043208150000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 273         49043208120000      COTTONWOOD CREEK      BEPCO        PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION            WI            NRI(1)        ORI(2)
- ------   -----------------------             --------            --            ------        ------
<S>      <C>                                 <C>                <C>           <C>           <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 237           NE NE 18 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 238           NW SW 33 48N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 239           SW NE 08 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 240           SW SE 07 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 241           SE NW 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 242           SE NW 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 243           SE SE 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 244           SW SE 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 245           NE SE 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 246           SW NE 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 247           SE NW 13 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 248           NE NE 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 249           NE NW 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 250           NE NE 14 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 251           SE NE 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 252           SW SW 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 253           NW NE 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 254           NE NE 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 255           SE NE 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 256           SW NW 20 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 257           SE NW 20 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 258           SW SE 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 259           SW SE 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 260           NW SE 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 261           NW SW 09 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 263           SW SE 32 48N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 267           NW NE 23 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 269           SW NW 26 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 271           NE NW 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 272           SE SE 02 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 273           NE NW 12 47N 91W   .91098801     .76677372     .00004650
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 7

<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                STATUS
  PP NO. PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR  01/01/98
  ------ -----------------------           ---                 -----                 --------  --------
<S>      <C>                               <C>                 <C>                   <C>       <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 274         49043208130000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 275         49043208140000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 276         49043208170000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 277         49043208080000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 278         49043208090000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 279         04043208060000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK UNIT 280         49043208100000      COTTONWOOD CREEK      BEPCO        PRD

1277602  COTTONWOOD CREEK UNIT - TENSLP
         TENSLEEP UNIT 065                 49043053000000      COTTONWOOD CREEK      BEPCO        PRD
         TENSLEEP UNIT 110                 49043202070000      COTTONWOOD CREEK      BEPCO        PRD
         TENSLEEP UNIT 117                 49043202190000      COTTONWOOD CREEK      BEPCO        PRD
         TENSLEEP UNIT 119                 49043202310000      COTTONWOOD CREEK      BEPCO        PRD

1277604  COTTONWOOD CREEK UNIT WELL#189
         COTTONWOOD CREEK NPA 189          49043206400000      COTTONWOOD CREEK      BEPCO        PRD

1277605  COTTONWOOD CREEK UNIT WELL#190
         COTTONWOOD CREEK NPA 190          49043206410000      COTTONWOOD CREEK      BEPCO        PRD

1277606  COTTONWOOD CREEK UNIT WELL #56
         COTTONWOOD CREEK NPA 056          49043053510000      COTTONWOOD CREEK      BEPCO        TA

1277608  COTTONWOOD CREEK UNIT WELL #76
         COTTONWOOD CREEK NPA 076          49043052800000      COTTONWOOD CREEK      BEPCO        TA

1277610  COTTONWOOD CREEK UNIT WELL #85
         COTTONWOOD CREEK NPA 085          49043051850000      COTTONWOOD CREEK      BEPCO        TA

1277611  COTTONWOOD CREEK UNIT WELL#197
         COTTONWOOD CREEK NPA 197          49043206440000      COTTONWOOD CREEK      BEPCO        TA

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION             WI            NRI(1)        ORI(2)
- ------   -----------------------             --------             --            ------        ------
<S>      <C>                                 <C>                <C>           <C>           <C>
1277601  COTTONWOOD CREEK UNIT - PHOSPH
         COTTONWOOD CREEK UNIT 274           SE NE 11 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 275           NE SW 12 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 276           NE NW 24 47N 91W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 277           NW SE 08 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 278           NW SE 17 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 279           NE NW 16 47N 90W   .91098801     .76677372     .00004650
         COTTONWOOD CREEK UNIT 280           NW NE 16 47N 90W   .91098801     .76677372     .00004650

1277602  COTTONWOOD CREEK UNIT - TENSLP
         TENSLEEP UNIT 065                   NW NE 07 47N 90W   1.00000000    .83746144     .00000000
         TENSLEEP UNIT 110                   SW NE 07 47N 90W   1.00000000    .83746144     .00000000
         TENSLEEP UNIT 117                   NW SE 07 47N 90W   1.00000000    .83746144     .00000000
         TENSLEEP UNIT 119                   NE NW 07 47N 90W   1.00000000    .83746144     .00000000

1277604  COTTONWOOD CREEK UNIT WELL#189
         COTTONWOOD CREEK NPA 189            NW SE 07 47N 91W   1.00000000    .82500000     .00000000

1277605  COTTONWOOD CREEK UNIT WELL#190
         COTTONWOOD CREEK NPA 190            NW NW 08 47N 91W   1.00000000    .82500000     .00000000

1277606  COTTONWOOD CREEK UNIT WELL #56
         COTTONWOOD CREEK NPA 056            NW SW 32 48N 91W    .91956760    .80462150     .00000000

1277608  COTTONWOOD CREEK UNIT WELL #76
         COTTONWOOD CREEK NPA 076            NW SW 08 47N 91W    .92203300    .67747480     .00000000

1277610  COTTONWOOD CREEK UNIT WELL #85
         COTTONWOOD CREEK NPA 085            NW NW 27 47N 91W    .91328560    .73088980     .00000000

1277611  COTTONWOOD CREEK UNIT WELL#197
         COTTONWOOD CREEK NPA 197            NW SE 09 47N 90W   1.00000000    .81500000     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.

                                                                        Page: 8
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                  OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                  --------   --------
<S>      <C>                               <C>                 <C>                    <C>        <C>
1277613  COTTONWOOD CREEK UNIT - FRONTIER
         COTTONWOOD CREEK UNIT 209         49043202580000      COTTONWOOD CREEK UNIT    BEPCO       TA

1277614  COTTONWOOD CREEK NPA - #109
         COTTONWOOD CREEK NPA 109          49043202050000      COTTONWOOD CREEK UNIT    BEPCO       TA

1277617  COTTONWOOD CREEK UNIT #262
         COTTONWOOD CREEK NPA 262          49043207870000      COTTONWOOD CREEK         BEPCO       PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION            WI            NRI(1)        ORI(2)
- ------   -----------------------             --------            --            ------        ------
<S>      <C>                                 <C>                <C>           <C>           <C>
1277613  COTTONWOOD CREEK UNIT - FRONTIER
         COTTONWOOD CREEK UNIT 209           NE NW 8  47N 90W  .00000000     .00000000     .00000000

1277614  COTTONWOOD CREEK NPA - #109
         COTTONWOOD CREEK NPA 109            NW SE 17 47N 91W  .91098801     .76677372     .00004650

1277617  COTTONWOOD CREEK UNIT #262
         COTTONWOOD CREEK NPA 262            SE SW 05 47N 91W  .91000750     .75075619     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 9

<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

COTTONWOOD CREEK FIELD EXTENSION (PHOSPHORIA) UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1196001  COTTONWOOD CREEK EXT UNIT
         CC EXTENSION UNIT 1-1             49043201540000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 11-1            49043201700000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 14-1            49043201760000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 16-1            49043201410000      COTTONWOOD CREEK      BEPCO         PA
         CC EXTENSION UNIT 16-1X           49043207230000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 18-1            49043056030000      COTTONWOOD CREEK      BEPCO         PA
         CC EXTENSION UNIT 19-1            49043201490000      COTTONWOOD CREEK      BEPCO         PA
         CC EXTENSION UNIT 19-1X           49043206170000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 20-1            49043201500000      COTTONWOOD CREEK      BEPCO         PA
         CC EXTENSION UNIT 20-1X           49043207240000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 21-1            49043201740000      COTTONWOOD CREEK      BEPCO         PA
         CC EXTENSION UNIT 22-1            49043201840000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 23-1            49043201860000      COTTONWOOD CREEK      BEPCO         PA
         CC EXTENSION UNIT 24-1            49043200080000      COTTONWOOD CREEK      BEPCO         PA
         CC EXTENSION UNIT 26-1            49043206280000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 27-1            49043206270000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 28-1            49043206260000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 29-1            49043207920000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 3-1             49043051750000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 30-1            49043208160000      COTTONWOOD CREEK      BEPCO         PRD
         CC EXTENSION UNIT 31-1            49043208220000      COTTONWOOD CREEK      BEPCO         PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION                 WI            NRI(1)        ORI(2)
- ------   -----------------------             --------                 --            ------        ------
<S>      <C>                                 <C>                      <C>           <C>           <C>
 1196001 COTTONWOOD CREEK EXT UNIT
         CC EXTENSION UNIT 1-1               LOT  5    01  46N  91W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 11-1              NW   SE   31  47N  90W   .96870790     .81103222     .00061500
         CC EXTENSION UNIT 14-1              LOT  14   06  46N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 16-1              NW   SW   31  47N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 16-1X             LOT  7    31  47N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 18-1              NE   SW   25  47N  91W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 19-1              LOT  12   06  46N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 19-1X             LOT  13   06  46N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 20-1              LOT  20   06  46N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 20-1X             LOT  18   06  46N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 21-1              SW   SW   32  47N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 22-1              SW   NW   32  47N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 23-1              SW   NE   31  47N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 24-1              NW   NE   36  47N  91W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 26-1              SE   SW   25  47N  91W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 27-1              LOT  12   06  46N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 28-1              SE   SW   31  47N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 29-1              NW   SW   25  47N  91W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 3-1               SW   SW   29  47N  90W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 30-1              SE   SE   26  47N  91W   .96870790     .81103222     .00061900
         CC EXTENSION UNIT 31-1              LOT  08   31  47N  90W   .96870790     .81103222     .00061900

</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 1
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

NO WATER CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1252302  NO WATER CREEK UNIT
         NO WATER CREEK UNIT 11            49043200970000      NO WATER CREEK        BEPCO         TA
         NO WATER CREEK UNIT 12            49043201100000      NO WATER CREEK        BEPCO         TA
         NO WATER CREEK UNIT 14            49043201330000      NO WATER CREEK        BEPCO         TA
         NO WATER CREEK UNIT 17            49043207640000      NO WATER CREEK        BEPCO         PRD
         NO WATER CREEK UNIT 18            49043207930000      NO WATER CREEK        BEPCO         PRD
         NO WATER CREEK UNIT 19            49043208260000      NO WATER CREEK        BEPCO         PRD
         NO WATER CREEK UNIT 2             49043200280000      NO WATER CREEK        BEPCO         PA
         NO WATER CREEK UNIT 20            49043208250000      NO WATER CREEK        BEPCO         PRD
         NO WATER CREEK UNIT 3             49043200450000      NO WATER CREEK        BEPCO         PA
         NO WATER CREEK UNIT 5             49043200530000      NO WATER CREEK        BEPCO         PRD
         NO WATER CREEK UNIT 6             49043200640000      NO WATER CREEK        BEPCO         TA
         NO WATER CREEK UNIT 7             49043200690000      NO WATER CREEK        BEPCO         TA
         NO WATER CREEK UNIT 9             49043200810000      NO WATER CREEK        BEPCO         PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION              WI            NRI(1)        ORI(2)
- ------   -----------------------             --------              --            ------        ------
<S>      <C>                                 <C>                  <C>           <C>           <C>
1252302  NO WATER CREEK UNIT
         NO WATER CREEK UNIT 11              SW   NW 05 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 12              NW   SE 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 14              NE   SW 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 17              LOT  16 05 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 18              LOT  13 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 19              LOT  11 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 2               LOT  13 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 20              SE   NW 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 3               LOT  22 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 5               LOT  16 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 6               LOT  19 06 46N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 7               SW   SE 31 47N 91W   .94441730     .78727357     .00000000
         NO WATER CREEK UNIT 9               LOT  09 05 46N 91W   .94441730     .78727357     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 1
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

SLICK CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------  -----------------------            ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1252208  SLICK CREEK UNIT (PHOSPHORIA)
         SLICK CREEK H20 INJ #2            49043050020000      SLICK CREEK           BEPCO         DAI
         SLICK CREEK PHOSPHORIA 02         49043050020000      SLICK CREEK           BEPCO         TA
         SLICK CREEK PHOSPHORIA 03         49043051620000      SLICK CREEK           BEPCO         PA
         SLICK CREEK PHOSPHORIA 05         49043051700000      SLICK CREEK           BEPCO         PA
         SLICK CREEK PHOSPHORIA 06         49043051680000      SLICK CREEK           BEPCO         PA
         SLICK CREEK PHOSPHORIA 07         49043051660000      SLICK CREEK           BEPCO         PA
         SLICK CREEK PHOSPHORIA 1          49043051670000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK PHOSPHORIA 10         49043201520000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK PHOSPHORIA 11         49043201530000      SLICK CREEK           BEPCO         PA
         SLICK CREEK PHOSPHORIA 12         49043201580000      SLICK CREEK           BEPCO         PA
         SLICK CREEK PHOSPHORIA 21         49043210990000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK PHOSPHORIA 22         49043202250000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK PHOSPHORIA 30         49043205330000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK PHOSPHORIA 34-43      49043206530000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK PHOSPHORIA 35-31      49043206360000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK PHOSPHORIA 4          49043051610000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK PHOSPHORIA 8          49043051640000      SLICK CREEK           BEPCO         TA

1252209  SLICK CREEK UNIT (FRONTIER)
         SLICK CREEK FRONTIER 13           49043201630000      SLICK CREEK           BEPCO         PA
         SLICK CREEK FRONTIER 15           49043201640000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK FRONTIER 19           49043201690000      SLICK CREEK           BEPCO         PA
         SLICK CREEK FRONTIER 20           49043201670000      SLICK CREEK           BEPCO         PRD
         SLICK CREEK FRONTIER 8            49043051640000      SLICK CREEK           BEPCO         PA

1252210  SLICK CREEK UNIT (MUDDY)
         SLICK CREEK MUDDY 06              49043051680000      SLICK CREEK           BEPCO         PA
         SLICK CREEK MUDDY 07              49043051660000      SLICK CREEK           BEPCO         PA
         SLICK CREEK MUDDY 11              49043201530000      SLICK CREEK           BEPCO         PA
         SLICK CREEK MUDDY 16              49043201650000      SLICK CREEK           BEPCO         PA

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION             WI            NRI(1)        ORI(2)
- ------   -----------------------             --------             --            ------        ------
<S>      <C>                                 <C>                 <C>           <C>           <C>
1252208  SLICK CREEK UNIT (PHOSPHORIA)
         SLICK CREEK H20 INJ #2              SE  NW 34 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 02           SE  NW 34 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 03           LOT 8  02 46N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 05           SE  NW 35 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 06           SE  NW 33 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 07           NE  SE 33 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 1            SE  NE 32 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 10           SE  SW 35 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 11           SE  SE 32 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 12           NE  SW 32 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 21           NW  NE 02 46N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 22           NE  NE 34 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 30           NE  SW 33 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 34-43        SE  NE 34 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 35-31        NW  SE 35 47N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 4            LOT 8  03 46N 92W   1.00000000    .86266071     .00054626
         SLICK CREEK PHOSPHORIA 8            SW  SE 34 47N 92W   1.00000000    .86266071     .00054626

1252209  SLICK CREEK UNIT (FRONTIER)
         SLICK CREEK FRONTIER 13             NW  SE 34 47N 92W   1.00000000    .86500050     .00103100
         SLICK CREEK FRONTIER 15             LOT 8  02 46N 92W   1.00000000    .86500050     .00103100
         SLICK CREEK FRONTIER 19             NW  SE 33 47N 92W   1.00000000    .86500050     .00103100
         SLICK CREEK FRONTIER 20             NW  SW 35 47N 92W   1.00000000    .86500050     .00103100
         SLICK CREEK FRONTIER 8              SW  SE 34 47N 92W   1.00000000    .86500050     .00103100

1252210  SLICK CREEK UNIT (MUDDY)
         SLICK CREEK MUDDY 06                SE  NW 33 47N 92W   .00000000     .00000000     .00000000
         SLICK CREEK MUDDY 07                NE  SE 33 47N 92W   .00000000     .00000000     .00000000
         SLICK CREEK MUDDY 11                SE  SE 32 47N 92W   .00000000     .00000000     .00000000
         SLICK CREEK MUDDY 16                NE  SW 32 47N 92W   .00000000     .00000000     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 1
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

SLICK CREEK UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>

1252210  SLICK CREEK UNIT (MUDDY)
         SLICK CREEK MUDDY 17              49043201660000      SLICK CREEK             BEPCO       PA

SLICK CREEK UNIT

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION                 WI            NRI(1)        ORI(2)
- ------   -----------------------             --------                 --            ------        ------
<S>      <C>                                 <C>                     <C>           <C>           <C>
1252210  SLICK CREEK UNIT (MUDDY)
         SLICK CREEK MUDDY 17                LOT 8 03 46N 92W        .00000000     .00000000     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 2
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

SOUTH FRISBY UNIT

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1252214  SOUTH FRISBY UNIT
         SOUTH FRISBY 2                    49043202040000      SOUTH FRISBY          BEPCO      PRD
         SOUTH FRISBY 24-33                49043206390000      SOUTH FRISBY          BEPCO      PRD
         SOUTH FRISBY 3                    49043202350000      SOUTH FRISBY          BEPCO      TA
         SOUTH FRISBY 4                    49043202600000      SOUTH FRISBY          BEPCO      PA
         SOUTH FRISBY 6                    49043202950000      SOUTH FRISBY          BEPCO      PRD
         SOUTH FRISBY 7                    49043203940000      SOUTH FRISBY          BEPCO      PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME            LOCATION                 WI            NRI(1)        ORI(2)
- ------   -----------------------            --------                 --            ------        ------
<S>      <C>                                <C>                      <C>           <C>           <C>
1252214  SOUTH FRISBY UNIT
         SOUTH FRISBY 2                     NW SE 24 47N 92W         1.00000000    .86004334     .00000000
         SOUTH FRISBY 24-33                 SE SE 24 47N 92W         1.00000000    .86004334     .00000000
         SOUTH FRISBY 3                     SE NW 24 47N 92W         1.00000000    .86004334     .00000000
         SOUTH FRISBY 4                     NE NE 25 47N 92W         1.00000000    .86004334     .00000000
         SOUTH FRISBY 6                     LOT 9 30 47N 91W         1.00000000    .86004334     .00000000
         SOUTH FRISBY 7                     SE NW 30 47N 91W         1.00000000    .86004334     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 1
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

NON-UNITIZED ASSETS (COOP)

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1161201  COTTONWOOD CREEK FEDERAL
         COTTONWOOD CREEK 35-1             49043203730000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK 35-44            49043205970000      COTTONWOOD CREEK      BEPCO        PRD

1161202  COTTONWOOD CREEK STATE
         COTTONWOOD CREEK 36-1             49043204090000      COTTONWOOD CREEK      BEPCO        PRD
         COTTONWOOD CREEK 36-24            49043205690000      COTTONWOOD CREEK      BEPCO        PRD

1161203  COTTONWOOD CREEK FEDERAL #35-2
         COTTONWOOD CREEK 35-2             49043204050000      COTTONWOOD CREEK      BEPCO        PRD

1161204  COTTONWOOD CREEK FEDERAL #35-3
         COTTONWOOD CREEK 35-3             49043204020000      COTTONWOOD CREEK      BEPCO        PRD

1161205  COTTONWOOD CREEK FEDERAL #2-1
         COTTONWOOD CREEK 2-1              49043204260000      COTTONWOOD CREEK      BEPCO        PRD

1161207  COTTONWOOD CREEK FEDERAL #2-34
         COTTONWOOD CREEK 2-34             49043204730000      COTTONWOOD CREEK      BEPCO        PRD

1161212  COTTONWOOD CREEK FEDERAL #26-23
         COTTONWOOD CREEK 26-23            49043206250000      COTTONWOOD CREEK      BEPCO        PRD

1161213  COTTONWOOD CREEK FEDERAL #21-23
         COTTONWOOD CREEK 21-23            49043206500000      COTTONWOOD CREEK      BEPCO        PRD

1161214  COTTONWOOD CREEK FEDERAL #28-41
         COTTONWOOD CREEK 28-41            49043206450000      COTTONWOOD CREEK      BEPCO        TA

1161215  COTTONWOOD CREEK FEDERAL #26-21
         COTTONWOOD CREEK 26-21            49043206510000      COTTONWOOD CREEK      BEPCO        PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION            WI            NRI(1)        ORI(2)
- ------   -----------------------             --------            --            ------        ------
<S>      <C>                                 <C>                <C>           <C>           <C>
1161201  COTTONWOOD CREEK FEDERAL
         COTTONWOOD CREEK 35-1               NW NE 35 47N 91W   1.00000000    .81250000     .00000000
         COTTONWOOD CREEK 35-44              NE NE 35 47N 91W   1.00000000    .81250000     .00000000

1161202  COTTONWOOD CREEK STATE
         COTTONWOOD CREEK 36-1               SW NW 36 47N 91W   1.00000000    .81250000     .00000000
         COTTONWOOD CREEK 36-24              NE SW 36 47N 91W   1.00000000    .81250000     .00000000

1161203  COTTONWOOD CREEK FEDERAL #35-2
         COTTONWOOD CREEK 35-2               NW NW 35 47N 91W   1.00000000    .81562500     .00000000

1161204  COTTONWOOD CREEK FEDERAL #35-3
         COTTONWOOD CREEK 35-3               NW SE 35 47N 91W   1.00000000    .81250000     .00000000

1161205  COTTONWOOD CREEK FEDERAL #2-1
         COTTONWOOD CREEK 2-1                LOT 11 2 46N 91W   1.00000000    .81250000     .00000000

1161207  COTTONWOOD CREEK FEDERAL #2-34
         COTTONWOOD CREEK 2-34               NE SE 2  46N 91W   1.00000000    .82500000     .00000000

1161212  COTTONWOOD CREEK FEDERAL #26-23
         COTTONWOOD CREEK 26-23              SE SW 26 47N 91W   1.00000000    .70312500     .00187500

1161213  COTTONWOOD CREEK FEDERAL #21-23
         COTTONWOOD CREEK 21-23              SE SW 21 47N 91W   1.00000000    .80937500     .06562500

1161214  COTTONWOOD CREEK FEDERAL #28-41
         COTTONWOOD CREEK 28-41              NW NE 28 47N 91W   1.00000000    .73125000     .01875000

1161215  COTTONWOOD CREEK FEDERAL #26-21
         COTTONWOOD CREEK 26-21              NW SW 26 47N 91W   1.00000000    .71290000     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 1
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

NON-UNITIZED ASSETS (CO-OP)

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>
1161217  KNISLEY FEDERAL #1
         KNISELY FEDERAL #1                49043051760000      COTTONWOOD CREEK      BEPCO        PRD

1252201  EARL SCHRANTZ USA
         SCHRANTZ USA 1                    49043051730000      COTTONWOOD CREEK      BEPCO        PRD
         SCHRANTZ USA 3                    49043200500000      COTTONWOOD CREEK      BEPCO        PRD
         SCHRANTZ USA 4                    49043200510000      COTTONWOOD CREEK      BEPCO        PA
         SCHRANTZ USA 5                    49043208240000      COTTONWOOD CREEK      BEPCO        PRD

1252202  TOLMAN USA
         TOLMAN USA 2                      49043200330000      COTTONWOOD CREEK      BEPCO        PRD
         TOLMAN USA 3                      49043200590000      COTTONWOOD CREEK      BEPCO        PRD

1252203  CALDWELL USA #1-7
         CALDWELL USA 1-7                  49043203830000      COTTONWOOD CREEK      BEPCO        PRD

1252204  FAURE USA
         USA FAURE 1                       49043200430000      RATTLESNAKE           BEPCO        PRD
         USA FAURE 2                       49043200570000      RATTLESNAKE           BEPCO        PA
         USA FAURE 4                       49043201020000      RATTLESNAKE           BEPCO        PRD

1252205  FAURE "A" USA
         USA FAURE A2-2                    49043203840000      RATTLESNAKE           BEPCO        PRD

1252206  LACOY FEDERAL
         LACOY FEDERAL 13-1                49043200770000      RATTLESNAKE           BEPCO        PRD

1252207  BEARD FEDERAL
         BEARD FEDERAL 1                   49043201090000      RATTLESNAKE           BEPCO        PA

1252211  ROME FEDERAL
         ROME FEDERAL 1                    49043201720000      SLICK CREEK           BEPCO        PRD

<CAPTION>
PP NO.  PROPERTY NAME/WELL NAME            LOCATION             WI            NRI(1)        ORI(2)
- ------   -----------------------            --------            --            ------        ------
<S>      <C>                                <C>                <C>           <C>           <C>
1161217  KNISLEY FEDERAL #1
         KNISELY FEDERAL #1                 NW SE 27 47N 91W   1.00000000    .71500000     .00000000

1252201  EARL SCHRANTZ USA
         SCHRANTZ USA 1                     NW NE 33 47N 91W   1.00000000    .79375000     .05035164
         SCHRANTZ USA 3                     SW SE 32 47N 91W   1.00000000    .79375000     .05035164
         SCHRANTZ USA 4                     SW SW 32 47N 91W   1.00000000    .79375000     .05035164
         SCHRANTZ USA 5                     NE SW 32 47N 91W   1.00000000    .79375000     .05035164

1252202  TOLMAN USA
         TOLMAN USA 2                       NW SW 28 47N 91W   1.00000000    .87500000     .00000000
         TOLMAN USA 3                       NW NW 28 47N 91W   1.00000000    .87500000     .00000000

1252203  CALDWELL USA #1-7
         CALDWELL USA 1-7                   LO 12 07 47N  91W   .55480654     .47179217     .00000000

1252204  FAURE USA
         USA FAURE 1                        NW NW 11 47N 92W   1.00000000    .82500000     .00000000
         USA FAURE 2                        NW SE 11 47N 92W   1.00000000    .82500000     .00000000
         USA FAURE 4                        NW SW 11 47N 92W   1.00000000    .82500000     .00000000

1252205  FAURE "A" USA
         USA FAURE A2-2                     NE NE 02 47N 92W   1.00000000    .82500000     .00000000

1252206  LACOY FEDERAL
         LACOY FEDERAL 13-1                 NW NW 13 47N 92W   1.00000000    .82500000     .00000000

1252207  BEARD FEDERAL
         BEARD FEDERAL 1                    NW NW 12 47N 92W   1.00000000    .84900000     .00000000

1252211  ROME FEDERAL
         ROME FEDERAL 1                     SE SE 02 46N 92W   1.00000000    .81250000     .06250000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 2
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

NON-UNITIZED ASSETS (CO-OP)

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>

1252213  NEIBER II UNIT (TENSLEEP)
         NEIBER UNIT II-I                  49043202610000      NEIBER DOME           BEPCO         PRD

1252215  SOUTH FRISBY LACOY FED #5 & #8
         SOUTH FRISBY 5                    49043202630000      SOUTH FRISBY          BEPCO         PRD
         SOUTH FRISBY 8                    49043203950000      SOUTH FRISBY          BEPCO         PRD

1252217  CALDWELL USA #20
         CALDWELL 1-20                     49043203960000      COTTONWOOD CREEK      BEPCO         PRD
         CALDWELL 2-20                     49043203990000      COTTONWOOD CREEK      BEPCO         PRD

1252218  SMITH USA #30
         SMITH USA 1-30                    49043203620000      SOUTH FRISBY          BEPCO         PRD

1252219  TENNECO FEDERAL #23
         TENNECO FEDERAL 1-23              49043204960000      SOUTH FRISBY          BEPCO         PRD

1252220  COTTONWOOD CREEK FEDERAL #19
         COTTONWOOD CREEK FED 19-1         49043203520000      SOUTH FRISBY          BEPCO         PRD

1252328  NO WATER CREEK #4
         NO WATER CREEK 4                  49043200540000      NO WATER CREEK        BEPCO         PA

1252329  NO WATER CREEK #8
         NO WATER CREEK 8                  49043201180000      NO WATER CREEK        BEPCO         TA

1252330  NO WATER CREEK #13
         NO WATER CREEK 13                 49043201230000      NO WATER CREEK        BEPCO         TA

1252331  NO WATER CREEK #15
         NO WATER CREEK 15                 49043201290000      NO WATER CREEK        BEPCO         TA

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME             LOCATION             WI            NRI(1)        ORI(2)
- ------   -----------------------             --------             --            ------        ------
<S>      <C>                                 <C>                 <C>           <C>           <C>
1252213  NEIBER II UNIT (TENSLEEP)
         NEIBER UNIT II-I                    LOT 15 19 45N 92W   .76909143     .67295528     .00000000

1252215  SOUTH FRISBY LACOY FED #5 & #8
         SOUTH FRISBY 5                      LOT 9  19 47N 91W   1.00000000    .85500000     .00000000
         SOUTH FRISBY 8                      NE  NE 24 47N 92W   1.00000000    .85500000     .00000000

1252217  CALDWELL USA #20
         CALDWELL 1-20                       SW  SW 20 47N 91W   1.00000000    .84000000     .00000000
         CALDWELL 2-20                       SW  NW 20 47N 91W   1.00000000    .84000000     .00000000

1252218  SMITH USA #30
         SMITH USA 1-30                      NE  NE 30 47N 91W   1.00000000    .84750000     .00000000

1252219  TENNECO FEDERAL #23
         TENNECO FEDERAL 1-23                SE  NE 23 47N 92W   1.00000000    .87500000     .00000000

1252220  COTTONWOOD CREEK FEDERAL #19
         COTTONWOOD CREEK FED 19-1           NW  SE 19 47N 91W   1.00000000    .85250000     .00000000

1252328  NO WATER CREEK #4
         NO WATER CREEK 4                    LOT 9  31 47N 91W   1.00000000    .82500000     .00000000

1252329  NO WATER CREEK #8
         NO WATER CREEK 8                    SW  NE 31 47N 91W   1.00000000    .82500000     .00000000

252330   NO WATER CREEK #13
         NO WATER CREEK 13                   LOT 11 05 46N 91W   1.00000000    .84500000     .00000000

1252331  NO WATER CREEK #15
         NO WATER CREEK 15                   SW  NE 05 46N 91W   1.00000000    .84500000     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 3
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

NON-UNITIZED ASSETS (CO-OP)

<TABLE>
<CAPTION>
                                                                                                 STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR   01/01/98
- ------   -----------------------           ---                 -----                 --------   --------
<S>      <C>                               <C>                 <C>                   <C>        <C>

1305001  CHAMBERS STATE
         CHAMBERS STATE #1-36              49043203040000      RATTLESNAKE           BEPCO         PRD
         CHAMBERS STATE #2-36              49043203140000      RATTLESNAKE           BEPCO         PRD
         CHAMBERS STATE #3-36              49043203210000      RATTLESNAKE           BEPCO         PA
         CHAMBERS STATE #4-36              49043207940000      RATTLESNAKE           BEPCO         PRD
         CHAMBERS STATE #5-36              49043208200000      RATTLESNAKE           BEPCO         PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME            LOCATION            WI            NRI(1)        ORI(2)
- ------   -----------------------            --------            --            ------        ------
<S>      <C>                                <C>                <C>           <C>           <C>
1305001  CHAMBERS STATE
         CHAMBERS STATE #1-36               SW SW 36 48N 92W   1.00000000    .84500000     .00000000
         CHAMBERS STATE #2-36               SW SE 36 48N 92W   1.00000000    .84500000     .00000000
         CHAMBERS STATE #3-36               SW NW 36 48N 92W   1.00000000    .84500000     .00000000
         CHAMBERS STATE #4-36               NE SW 36 48N 92W   1.00000000    .84500000     .00000000
         CHAMBERS STATE #5-36               SW NE 36 48N 92W   1.00000000    .84500000     .00000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 4

<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

NON-UNITIZED ASSETS (OSO)

<TABLE>
<CAPTION>
                                                                                                                  STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR                    01/01/98
- ------   -----------------------           ---                 -----                 --------                    --------
<S>      <C>                               <C>                 <C>                   <C>                         <C>
1252303  COSEKA FEDERAL #18-3 & #18-4
         ALTUS GOVERNMENT 18-3             49043203460000      COTTONWOOD CREEK      WAGNER & BROWN, LTD.          PRD
         ALTUS GOVERNMENT 18-4             49043205420000      COTTONWOOD CREEK      WAGNER & BROWN, LTD.          PRD

1252304  GOVERNMENT 29-1
         GOVERNMENT 29-1                   49043202960000      COTTONWOOD CREEK      SAMSON RESOURCES CORP         PA

1252305  COSEKA FEDERAL #13-1, 2 & 3
         ALTUS GOVERNMENT 13-1             49043203310000      COTTONWOOD CREEK      WAGNER & BROWN, LTD.          SI
         ALTUS GOVERNMENT 13-2             49043203470000      COTTONWOOD CREEK      WAGNER & BROWN, LTD.          SI
         ALTUS GOVERNMENT 13-3             49043205560000      COTTONWOOD CREEK      WAGNER & BROWN, LTD.          SI

1252306  COSEKA FEDERAL #18-1 & #18-5
         ALTUS GOVERNMENT 18-1             49043203200000      COTTONWOOD CREEK      WAGNER & BROWN, LTD.          PRD
         ALTUS GOVERNMENT 18-5             49043205740000      COTTONWOOD CREEK      WAGNER & BROWN, LTD.          PRD

1252307  BRENT FEDERAL #2 & #3 FED #32-1
         BRENT FEDERAL 2                   49043203920000      COTTONWOOD CREEK      BRENT EXPLORATION, INC.       SI
         BRENT FEDERAL 3                   49043203930000      COTTONWOOD CREEK      BRENT EXPLORATION, INC.       SI
         FEDERAL 32-1                      49043205090000      COTTONWOOD CREEK      BRENT EXPLORATION, INC.       SI

1252308  MARTIN FEDERAL #29-2
         MARTIN FEDERAL 29-2               49043203300000      COTTONWOOD CREEK      SAMSON RESOURCES CORP         PRD

1252309  GOVERNMENT #14-2
         GOVERNMENT #14-2                  49043202920000      RATTLESNAKE           SAMSON RESOURCES CORP         SI

1252310  TENNECO GOVERNMENT #1-1 & 1-2
         TENNECO GOVERNMENT 1-2            49043202940000      COTTONWOOD CREEK      SAMSON RESOURCES CORP         SI

1252311  GOVERNMENT #27-1
         GOVERNMENT 27-1                   49043202810000      COTTONWOOD CREEK      MARKUS PRODUCTION, INC.       PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME            LOCATION               WI            NRI(1)        ORI(2)
- ------   -----------------------            --------               --            ------        ------
<S>      <C>                                <C>                   <C>           <C>           <C>
1252303  COSEKA FEDERAL #18-3 & #18-4
         ALTUS GOVERNMENT 18-3              SE  NW 18 47N 91W     .00000000     .00000000     .09000000
         ALTUS GOVERNMENT 18-4              NW  NW 18 47N 91W     .00000000     .00000000     .09000000

1252304  GOVERNMENT 29-1
         GOVERNMENT 29-1                    SW  SW 29 47N 91W     .00000000     .00000000     .00000000

1252305  COSEKA FEDERAL #13-1, 2 & 3
         ALTUS GOVERNMENT 13-1              NE  NE 13 47N 92W     .00000000     .00000000     .09500000
         ALTUS GOVERNMENT 13-2              NE  SE 13 47N 92W     .00000000     .00000000     .09500000
         ALTUS GOVERNMENT 13-3              NW  NE 13 47N 92W     .00000000     .00000000     .09500000

1252306  COSEKA FEDERAL #18-1 & #18-5
         ALTUS GOVERNMENT 18-1              Lot 12 18 47N 91W     .00000000     .00000000     .08874760
         ALTUS GOVERNMENT 18-5              NE  SW 18 47N 91W     .00000000     .00000000     .08874760

1252307  BRENT FEDERAL #2 & #3 FED #32-1
         BRENT FEDERAL 2                    SW  NE 32 47N 91W     .00000000     .00000000     .09472400
         BRENT FEDERAL 3                    SW  NW 33 47N 91W     .00000000     .00000000     .09472400
         FEDERAL 32-1                       NE  NE 32 47N 91W     .00000000     .00000000     .09472400

1252308  MARTIN FEDERAL #29-2
         MARTIN FEDERAL 29-2                SW  NW 29 47N 91W     .04848480     .03636360     .09000000

1252309  GOVERNMENT #14-2
         GOVERNMENT #14-2                   NW  NW 14 47N 92W     .00000000     .00000000     .06250000

1252310  TENNECO GOVERNMENT #1-1 & 1-2
         TENNECO GOVERNMENT 1-2             SW  NW 01 47N 92W     .00000000     .00000000     .01875000

1252311  GOVERNMENT #27-1
         GOVERNMENT 27-1                    SW  SW 27 47N 92W     .26666640     .19999980     .08500000

</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 1
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

NON-UNITIZED ASSETS (OSO)

<TABLE>
<CAPTION>
                                                                                                                  STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR                    01/01/98
- ------   -----------------------           ---                 -----                 --------                    --------
<S>      <C>                               <C>                 <C>                   <C>                         <C>
1252313  BRENT FEDERAL #11-1
         BRENT FEDERAL 11-1                49043204440000      COTTONWOOD CREEK      WASHAKIE ENERGIES CO. LT       PRD

1252314  BRENT FEDERAL #16-1
         BRENT FEDERAL 16-1                49043204480000      COTTONWOOD CREEK      WASHAKIE ENERGIES CO. LT       PRD

1252316  SCHETTERLY #1-30
         ALTUS SCHETTERLY 1-30             49043203630000      SOUTH FRISBY          BRENT EXPLORATION, INC.        PRD

1252317  BRENT FEDERAL #3-25
         BRENT FEDERAL 3-25                49043204330000      SOUTH FRISBY          BRENT EXPLORATION, INC.        PRD

1252318  BRENT FEDERAL 13-24
         BRENT FEDERAL 13-24               49043204600000      FRISBY SOUTH          BRENT EXPLORATION, INC.        PRD

1252319  BRENT FEDERAL 25-7
         BRENT FEDERAL 25-7                49043205360000      FRISBY SOUTH          ANDERSON MYERS                 PA

1252320  TENNECO USA #1
         TENNECO USA 1                     49043205910000      COTTONWOOD CREEK      CAROL-HOLLY OIL CORP.          PRD

1252321  GOVERNMENT #25-1
         GOVERNMENT 25-1                   49043202990000      SOUTH FORK            MARKUS PRODUCTION, INC.        PRD

1252322  GOVERNMENT #36-1
         GOVERNMENT 36-1                   49043202890000      COTTONWOOD CREEK      MARKUS PRODUCTION, INC.        SI

1252324  TENNECO USA 2
         TENNECO USA 2                     49043206080000      COTTONWOOD CREEK      WYOMING RESOURCES              PA

1252325  TENNECO USA #3
         TENNECO USA 3                     49043206230000      COTTONWOOD CREEK      CAROL-HOLLY OIL CORP.          PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME            LOCATION              WI            NRI(1)        ORI(2)
- ------   -----------------------            --------              --            ------        ------
<S>      <C>                                <C>                  <C>           <C>           <C>
1252313  BRENT FEDERAL #11-1
         BRENT FEDERAL 11-1                 NE SW 01 46N 92W     .00000000     .00000000     .05000000

1252314  BRENT FEDERAL #16-1
         BRENT FEDERAL 16-1                 SE SE 01 46N 92W     .00000000     .00000000     .05000000

1252316  SCHETTERLY #1-30
         ALTUS SATTTERLY 1-30               NE SE 30 47N 91W     .00000000     .00000000     .06500000

1252317  BRENT FEDERAL #3-25
         BRENT FEDERAL 3-25                 NE NW 25 47N 92W     .00000000     .00000000     .05000000

1252318  BRENT FEDERAL 13-24
         BRENT FEDERAL 13-24                SW SW 24 47N 92W     .00000000     .00000000     .05000000

1252319  BRENT FEDERAL 25-7
         BRENT FEDERAL 25-7                 SW NE 25 47N 92W     .00000000     .00000000     .00000000

1252320  TENNECO USA #1
         TENNECO USA 1                      SW SE 25 47N 92W     .00000000     .00000000     .10000000

1252321  GOVERNMENT #25-1
         GOVERNMENT 25-1                    SE NW 25 46N 92W     .00000000     .00000000     .12500000

1252322  GOVERNMENT #36-1
         GOVERNMENT 36-1                    NE NE 36 47N 92W     .26666640     .19999980     .03750000

1252324  TENNECO USA 2
         TENNECO USA 2                      SE SW 28 47N 91W     .00000000     .00000000     .00000000

1252325  TENNECO USA #3
         TENNECO USA 3                      SE NW 28 47N 91W     .12500000     .11312500     .05000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.


                                                                        Page: 2
<PAGE>

     EXHIBIT B PURCHASE AND SALE AGREEMENT DATED _________________ , 1998

NON-UNITIZED ASSETS (OSO)

<TABLE>
<CAPTION>
                                                                                                                  STATUS
PP NO.   PROPERTY NAME/WELL NAME           API                 FIELD                 OPERATOR                    01/01/98
- ------   -----------------------           ---                 -----                 --------                    --------
<S>      <C>                               <C>                 <C>                   <C>                         <C>

1252327  RATTLESNAKE USA #4
         RATTLESNAKE 4                     49043206330000      COTTONWOOD CREEK      CAROL-HOLLY OIL CORP.           SI

1252332  BRENT FEDERAL #1
         BRENT FEDERAL #1                  49043203910000      COTTONWOOD CREEK      BRENT EXPLORATION CO            SI

1252333  HONEY BUTTE FEDERAL #3
         HONEY BUTTE FEDERAL #3            49043203390000      RATTLESNAKE           HANSON OPERATING COMPANY        PRD

1252334  GOVERNMENT #14-1
         GOVERNMENT 14-1                   49043201140000      RATTLESNAKE           MARKUS PRODUCTION, INC.         SI

1252335  TENNECO GOVERNMENT #1-3
         TENNECO GOVERNMENT 1-3            49043203030000      COTTONWOOD CREEK      SAMSON RESOURCES CORP           PRD

1252336  TENNECO GOVERNMENT #1-4
         TENNECO GOVERNMENT 1-4            49043203010000      COTTONWOOD CREEK      SAMSON RESOURCES CORP           PRD

1252337  GOVERNMENT #28-1
         GOVERNMENT 28-1                   49043202970000      COTTONWOOD CREEK      MARKUS PRODUCTION, INC.         SI

1252338  GOVERNMENT #36-2
         GOVERNMENT 36-2                   49043203050000      COTTONWOOD CREEK      MARKUS PRODUCTION, INC.         SI

1256101  BASS FEDERAL 33-24 #1H
         #1 H BASS FEDERAL 33-24           49043207100000      MARSHALL              UNION PACIFIC RESOURCES         PRD

1288501  SAGEBUSH FEDERAL #13-25
         SAGEBUSH FED #13-25               49003208230000      SAGEBUSH              ALV COMPANY                     PRD

1288502  SAGEBUSH FEDERAL #32-26
         SAGEBUSH #32-26                   49003208270000      SAGEBUSH              ALV COMPANY                     PRD

<CAPTION>
PP NO.   PROPERTY NAME/WELL NAME       LOCATION             WI            NRI(1)        ORI(2)
- ------   -----------------------       --------             --            ------        ------
<S>      <C>                           <C>                  <C>           <C>           <C>
1252327  RATTLESNAKE USA #4
         RATTLESNAKE 4                 SE NW 11 47N 92W     .05000000     .04245000     .00000000

1252332  BRENT FEDERAL #1
         BRENT FEDERAL #1              NE NW 31 47N 91W     .00000000     .00000000     .09000000

1252333  HONEY BUTTE FEDERAL #3
         HONEY BUTTE FEDERAL #3        SW SE 16 47N 91W     .10000000     .08350000     .00000000

1252334  GOVERNMENT #14-1
         GOVERNMENT 14-1               NW NE 14 47N 92W     .26666640     .19999978     .06250000

1252335  TENNECO GOVERNMENT #1-3
         TENNECO GOVERNMENT 1-3        SW NE 01 47N 92W     .25291700     .18652630     .01875000

1252336  TENNECO GOVERNMENT #1-4
         TENNECO GOVERNMENT 1-4        SW SE 01 47N 92W     .22736810     .16768400     .01875000

1252337  GOVERNMENT #28-1
         GOVERNMENT 28-1               SW SE 28 47N 92W     .04848480     .03636360     .08500000

1252338  GOVERNMENT #36-2
         GOVERNMENT 36-2               NE NW 36 47N 92W     .22736810     .17052610     .03750000

1256101  BASS FEDERAL 33-24 #1H
         #1 H BASS FEDERAL 33-24       SW SE 24 48N 92W     .00000000     .00000000     .03187499

1288501  SAGEBUSH FEDERAL #13-25
         SAGEBUSH FED #13-25           NW SW 25 51N 92W     .00000000     .00000000     .00830000

1288502  SAGEBUSH FEDERAL #32-26
         SAGEBUSH #32-26               SW NE 26 51N 92W     .00000000     .00000000     .04000000
</TABLE>

(1) Does not reflect reduced federal royalty rate, if applicable, on oil
production.

(2) May be subject to sliding scale/contractual adjustment/calculation.

                                                                        Page: 3
<PAGE>
                                     EXHIBIT "D"

52N/94W                            44N/91W
52N/93W                            44N/90W
52N/92W                            43N/94W
52N/91W                            43N/93W
52N/90W                            43N/92W
51N/94W                            43N/91W
51N/93W                            43N/90W
51N/92W
51N/91W
51N/90W
50N/94W
50N/93W
50N/92W
50N/91W
50N/90W
49N/94W
49N/93W
49N/92W
49N/91W
49N/90W
48N/94W
48N/93W
48N/92.5W
48N/92W
48N/91W
48N/90W
47N/94W
47N/93W
47N/92.5W
47N/92W
47N/91W
47N/90W
46N/94W
46N/93W
46N/92W
46N/91W
46N/90W
45N/94W
45N/93W
45N/92W
45N/91W
45N/90W
44N/94W
44N/93W
44N/92W

<PAGE>
                                  EXHIBIT E

                         ASSIGNMENT AND BILL OF SALE


KNOW ALL MEN BY THE PRESENTS:

     This Assignment and Bill of Sale ("Assignment") is made and entered into 
this _____ day of July, 1998 by and between CONTINENTAL RESOURCES, INC., 
whose address is P.O. Box 1032, Enid, OK 73702, hereinafter referred to as 
"Assignor" and HAROLD G. HAMM, AS TRUSTEE OF THE HAROLD G. HAMM REVOCABLE 
INTERVIVOS TRUST DATED APRIL 23, 1984, whose address is P.O. Box 1032, Enid, 
OK 73702, hereinafter referred to as "Assignee".

     Assignor, in and for Ten Dollars ($10.00) and other good and valuable 
consideration, the receipt of which is hereby acknowledged, does hereby 
grant, bargain, sell, assign and convey unto Assignee, an undivided fifty 
percent (50%) of all Assignor's right, title and interest in and to the 
following:

     (1) All oil & gas leases, overriding royalty interests, mineral and 
royalty interests, easements and rights-of-way, contractual rights and 
interests, together with all rights and interests appurtenant thereto or used 
or obtained in connection therewith which were acquired by Assignor pursuant 
to each of the Assignment and Bill of Sale documents described on the Exhibit 
"A" attached hereto, insofar as such interests relate to the lands described 
on the Exhibit "B" attached hereto;

     (2) All oil and gas wells and interests therein, together with all 
materials, supplies, machinery, equipment, improvements and other personal 
property and fixtures located thereon, associated therewith or appurtenant 
thereto that were acquired by Assignor pursuant to each of the Assignment and 
Bill of Sale documents described on the Exhibit "A" attached hereto.  Such 
wells are described on Exhibit "C" hereto

     It is Assignor's intent by this Assignment to convey unto Assignee an 
undivided fifty percent (50%) of all interests of whatsoever nature which 
Assignor acquired pursuant to the Assignment and Bill of Sale documents 
described on the Exhibit "A" attached hereto, to be effective as of the same 
time which Assignor received the interests pursuant to such documents, same 
as if Assignee had been a party thereto.

     The interest conveyed hereby shall bear it's proportionate part of all 
royalty interests, overriding royalty interests, production payments and 
other burdens relating to the interests hereby conveyed. Assignee agrees to 
assume it's proportionate part of all obligations associated with the 
interests hereby conveyed and be bound and abide by all contracts, agreements 
and governmental rules and regulations associated with such interests.

<PAGE>

     The conveyance made by this Assignment is effective June 1, 1998 at 7:00 
a.m., Mountain Standard Time.

     The terms and provisions of this Assignment shall be binding upon and 
inure to the benefit of the parties hereto together with their respective 
heirs, successors and assigns.  

     This Assignment is made and delivered to Assignee without warranty of 
title, express or implied.  

     This Assignment is made subject to the terms and provisions of that 
certain Worland Area Purchase and Sale Agreement dated June 25, 1998 between 
Assignor and Assignee.

     IN WITNESS WHEREOF, this Assignment is executed this ______ day of July, 
1998.



CONTINENTAL RESOURCES, INC.



By: ____________________________
    Tom Luttrell
    Vice President - Land



STATE OF OKLAHOMA    )
                     )
COUNTY OF GARFIELD   )

     Before me, the undersigned Notary Public in and for said County and 
State, on this ____ day of July, 1998 personally appeared Tom Luttrell who 
executed the foregoing document as Vice-President-Land for Continental 
Resources, Inc., an Oklahoma Corporation, who acknowledged to me that he 
executed same as his free and voluntary act and deed on behalf of said 
Corporation.

My commission expires:


- -------------------------------        -------------------------------
                                       Notary Public


                                       2



<PAGE>
                                     EXHIBIT "D"

<TABLE>
<CAPTION>
<S>                                <C>
52N/94W                            44N/91W
52N/93W                            44N/90W
52N/92W                            43N/94W
52N/91W                            43N/93W
52N/90W                            43N/92W
51N/94W                            43N/91W
51N/93W                            43N/90W
51N/92W
51N/91W
51N/90W
50N/94W
50N/93W
50N/92W
50N/91W
50N/90W
49N/94W
49N/93W
49N/92W
49N/91W
49N/90W
48N/94W
48N/93W
48N/92.5W
48N/92W
48N/91W
48N/90W
47N/94W
47N/93W
47N/92.5W
47N/92W
47N/91W
47N/90W
46N/94W
46N/93W
46N/92W
46N/91W
46N/90W
45N/94W
45N/93W
45N/92W
45N/91W
45N/90W
44N/94W
44N/93W
44N/92W
</TABLE>


<PAGE>

         EXHIBIT 12.1 - COMPUTATION OF RATIO OF DEBT TO ADJUSTED EBITDA

                         CONTINENTAL RESOURCES, INC.

<TABLE>
<CAPTION>
                                                                                  PRO FORMA                         PRO FORMA
                                                                                  YEAR ENDED       SIX MONTHS       SIX MONTHS
                                                 YEAR ENDED DECEMBER 31,          DECEMBER 31    ENDED JUNE 30,   ENDED JUNE 30,
                                       -----------------------------------------------------------------------------------------
                                        1993     1994     1995     1996     1997     1997         1997     1998        1998
                                       ------   ------   ------   ------   ------   -------      ------   ------      ------
<S>                                    <C>      <C>      <C>      <C>      <C>      <C>          <C>      <C>         <C>
NET INCOME                              5,772    2,875    3,869   13,325   26,197    20,007      16,330   (3,499)     (6,705)

INCOME TAXES                            2,974    1,596    2,252    8,238   (8,941)   (8,941)     (8,941)       0           0

INTEREST EXPENSE                          314      670    2,396    4,550    4,804    15,684       2,313    5,174       7,836

AMORTIZATION OF OFFERING COSTS                                                          460                              427

DD&A                                    4,816    6,068    9,614   22,876   33,354    34,931      16,713   16,483      17,508

EXPLORATION EXPENSE                     1,996    6,338    6,184    4,513    6,807     6,806       3,410    2,650       2,650

LITIGATION SETTLEMENT                  (4,000)                             (7,500)   (7,500)  
                                       -----------------------------------------------------------------------------------------

ADJUSTED EBITDA(1)                     11,872   17,547   24,315   53,502   54,721    61,447      29,825   20,808      21,716

TOTAL DEBT                              7,514    6,272   44,265   54,759   79,632   153,957   

TOTAL DEBT TO ADJUSTED EBITDA             0.6      0.4      1.8        1      1.5       2.5         N/A      N/A         N/A
</TABLE>

(1)  Adjusted EBITDA represents earnings before interest expense, income 
taxes, depreciation, depletion, amortization and exploration expense, 
excluding proceeds from the litigation settlements. Adjusted EBITDA is not a 
measure of cash flow as determined by generally accepted accounting 
principles ("GAAP"). Adjusted EBITDA should not be considered as an 
alternative to, or more meaningful than, net income or cash flow as 
determined in accordance with GAAP or as an indicator of a company's 
operating performance or liquidity. Certain items excluded from Adjusted 
EBITDA are significant components in understanding and assessing a company's 
financial performance, such as a company's cost of capital and tax structure, 
as well as historic costs of depreciable assets, none of which are components 
of Adjusted EBITDA. The Company's computations of Adjusted EBITDA may not be 
comparable to other similarly titled measures of other companies. The Company 
believes that Adjusted EBITDA is a widely followed measure of operating 
performance and may also be used by investors to measure the Company's 
ability to meet future debt service requirements, if any.


<PAGE>

       EXHIBIT 12.2 - COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

                         CONTINENTAL RESOURCES, INC.

<TABLE>

                                                                        PRO FORMA                        PRO FORMA
                                                                        YEAR ENDED      SIX MONTHS      SIX MONTHS
                                         YEAR ENDED DECEMBER 31,        DECEMBER 31,  ENDED JUNE 30,   ENDED JUNE 30,
                                   -----------------------------------------------------------------------------------
                                   1993   1994    1995   1996    1997      1997       1997      1998       1998
                                   ----   ----    ----   ----    ----      ----       ----      ----       ----       
<S>                                <C>    <C>    <C>    <C>     <C>       <C>         <C>       <C>        <C>        
EARNINGS(1)                        8,746  4,471  6,121  21,563  17,256    11,066      7,389    (3,499)     (6,705)    

FIXED CHARGES(2)                     314    670  2,396   4,550   4,804    16,144      2,313     5,174       8,263      
                                   ----------------------------------------------------------------------------------- 
TOTAL EARNINGS AND FIXED CHARGES   9,060  5,141  8,517  26,113  22,060    27,210      9,702     1,675       1,558      

RATIO                               28.9    7.7    3.6     5.7     4.6       1.7        4.2       N/A         N/A      
</TABLE>

(1)  "Earnings" represents income (loss) before provision for federal and 
     state income taxes or income tax benefits.  "Fixed charges" consists of 
     interest expense and amortization of costs incurred in connection with 
     the Offering.

(2)  Pro forma to give effect to the issuance of $150 million of Senior 
     Subordinated Notes due 2008 with an interest rate of 10.25%.  For 
     purposes of computing the Ratio of Earnings to Fixed Charges, interest 
     expense includes interest on the Senior Subordinated notes together with 
     amortization of the underwriting discounts and expenses of the Offering; 
     for the period ended December 31, 1997, amortization expense was 
     $460,000 and for the period ended June 30, 1998 amortization expense 
     was $232,000.


<PAGE>

   EXHIBIT 12.3 - COMPUTATION OF RATIO OF ADJUSTED EBITDA TO INTEREST EXPENSE

                         CONTINENTAL RESOURCES, INC.

<TABLE>
                                                                           PRO FORMA                       PRO FORMA
                                                                           YEAR ENDED     SIX MONTHS       SIX MONTHS
                                           YEAR ENDED DECEMBER 31,         DECEMBER 31,  ENDED JUNE 30,   ENDED JUNE 30, 
                                   -------------------------------------------------------------------------------------- 
                                    1993    1994    1995    1996     1997      1997       1997     1998       1998
                                    ----    ----    ----    ----     ----      ----       ----     ----       ----       
<S>                                <C>     <C>     <C>    <C>      <C>        <C>        <C>      <C>         <C>        
NET INCOME                         5,772   2,875   3,869  13,325   26,197    20,007     16,330   (3,499)    (6,705)

INCOME TAXES                       2,974   1,596   2,252   8,238   (8,941)   (8,941)    (8,941)       0          0

INTEREST EXPENSE                     314     670   2,396   4,550    4,804    15,684      2,313    5,174      7,836

AMORTIZATION OF OFFERING COSTS                                                  460                            427

DD&A                               4,816   6,068   9,614  22,876   33,354    34,931     16,713   16,483     17,508

EXPLORATION EXPENSE                1,996   6,338   6,184   4,513    6,807     6,806      3,410    2,650      2,650

LITIGATION SETTLEMENT             (4,000)                          (7,500)   (7,500)
                                   -----------------------------------------------------------------------------------  
ADJUSTED EBITDA(1)                11,872  17,547  24,315  53,502   54,721    61,447     29,825   20,808     21,716

TOTAL ADJUSTED EBITDA TO INTEREST   37.8    26.2    10.1    11.8     11.4       3.9       12.9      4.0        2.8
</TABLE>

(1)  Adjusted EBITDA represents earnings before interest expense, income taxes, 
     depreciation, depletion, amortization and exploration expense, excluding 
     proceeds from litigation settlements.  Adjusted EBITDA is not a measure 
     of cash flow as determined by generally accepted accounting principles 
     ("GAAP"). Adjusted EBITDA should not be considered as an alternative to, 
     or more meaningful than net income or cash flow as determined in 
     accordance with GAAP or as an indicator of a company's operating 
     performance or liquidity.  Certain items excluded from Adjusted EBITDA 
     are significant components in understanding and assessing a company's 
     financial performance, such as a company's cost of capital and tax 
     structure, as well as historic costs of depreciable assets, none of 
     which are components of adjusted EBITDA.  The Company's computations of 
     Adjusted EBITDA may not be comparable to other similarly titled measures 
     of other companies.  The Company believes that Adjusted EBITDA is a 
     widely followed measure of operating performance and may also be used by 
     investors to measure the Company's ability to meet future debt service 
     requirements, if any.


<PAGE>
                                                                    EXHIBIT 23.2
 
                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
As independent public accountants, we hereby consent to the use of our report
dated April 22, 1998, on the consolidated financial statements of Continental
Resources, Inc. and subsidiary and our report dated June 4, 1998, on the
Statements of Revenues and Direct Operating Expenses of Oil and Gas Properties
Included in the Purchase Agreement Between Continental Resources, Inc. and Bass
Enterprises Production Co. and to all references to our Firm included in this
registration statement.
 
                                          ARTHUR ANDERSEN LLP
 
   
Oklahoma City, Oklahoma
October 16, 1998
    

<PAGE>
                                                                    EXHIBIT 23.3
 
   
               CONSENT OF RYDER SCOTT COMPANY PETROLEUM ENGINEERS
    
 
As independent petroleum engineers, we hereby consent to the use of our review
and all references to our firm included or made a part of the Registration
Statement of Continental Resources, Inc. and its subsidiaries on Form S-4.
 
                             /s/ RYDER SCOTT COMPANY PETROLEUM ENGINEERS
                             ---------------------------------------------------
                             RYDER SCOTT COMPANY PETROLEUM ENGINEERS
 
   
Denver, Colorado
October 16, 1998
    

<PAGE>
                                  POWER OF ATTORNEY
                             (Senior Subordinated Notes)

     We, the undersigned officers and directors of Continental Resources, Inc.
(hereinafter, the "Company"), hereby severally constitute and appoint Harold
Hamm, Roger V. Clement and Randy Moeder, and each of them, severally, our true
and lawful attorneys-in-fact and agents, each with full power to act without the
other and with full power of substitution and resubstitution, to sign for us, in
our names as officers or directors, or both, of the Company, and file with the
Securities and Exchange Commission and any state securities regulatory board or
commission any documents relating to the securities offered pursuant to this
Registration Statement on Form S-4, including any amendments to this
Registration Statement on Form S-4 (including post-effective amendments) and any
registration statement for the same offering that is to be effective upon filing
pursuant to Rule 462(b) under the Securities Act of 1933 and any documents
required to be filed with respect thereto, granting unto said attorneys-in-fact
and agents, and each of them, full power and authority to do and to perform each
and every act and thing requisite and necessary to be done in and about the
premises, as fully to all intents and purposes as each of us might or could do
in person, hereby ratifying and confirming all that said attorneys-in-fact and
agents, or any of them, or their substitutes, may lawfully do or cause to be
done by virtue hereof.

                         DATED this 21st day of August, 1998.

/s/ HAROLD HAMM                    /s/ JACK H. STARK             
- ------------------------------     ------------------------------
Harold Hamm, Chairman of the       Jack H. Stark, Senior Vice
Board, President, Chief            President and Director
Executive Officer (Principal
Executive Officer) and
Director


/s/ ROGER V. CLEMENT               /s/ JEFF HUME                 
- ------------------------------     ------------------------------
Roger V. Clement, Senior Vice      Jeff Hume, Senior Vice
President, Treasurer and Chief     President and Director
Financial Officer (Principal
Financial and Accounting
Officer) and Director


/s/ RANDY MOEDER              
- ------------------------------
Randy Moeder, Senior Vice
President, General Counsel,
Secretary and Director

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE AUDITED
CONSOLIDATED BALANCE SHEET AND CONSOLIDATED STATEMENT OF OPERATIONS AT DECEMBER
31, 1996 AND 1997, AND THE UNAUDITED CONSOLIDATED BALANCE SHEET AT JUNE 30, 1998
AND CONSOLIDATED STATEMENT OF OPERATIONS AT JUNE 30, 1998 AND IS QUALIFIED IN
ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000732834
<NAME> CONTINENTAL RESOURCES INC
       
<S>                             <C>                     <C>
<PERIOD-TYPE>                   YEAR                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1998
<PERIOD-START>                             JAN-01-1997             JAN-01-1998
<PERIOD-END>                               DEC-31-1997             JUN-30-1998
<CASH>                                       1,301,115               1,336,110
<SECURITIES>                                         0                       0
<RECEIVABLES>                               25,143,543              15,732,561
<ALLOWANCES>                                         0                       0
<INVENTORY>                                  3,548,547               4,962,746
<CURRENT-ASSETS>                            30,435,471              42,016,174
<PP&E>                                     246,476,351             318,840,647
<DEPRECIATION>                            (88,559,352)           (103,918,055)
<TOTAL-ASSETS>                             188,386,166             257,863,253
<CURRENT-LIABILITIES>                       30,590,927              19,155,068
<BONDS>                                              0                       0
                                0                       0
                                          0                       0
<COMMON>                                        49,045                  49,041
<OTHER-SE>                                  78,215,404              74,716,050
<TOTAL-LIABILITY-AND-EQUITY>               188,386,166             257,863,253
<SALES>                                    103,619,839              41,094,998
<TOTAL-REVENUES>                           110,025,226              44,157,318
<CGS>                                       43,463,750              17,483,171
<TOTAL-COSTS>                               96,267,932              43,354,856
<OTHER-EXPENSES>                           (8,060,863)                (92,396)
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                           4,803,837               5,174,113
<INCOME-PRETAX>                             17,255,776             (3,499,358)
<INCOME-TAX>                               (8,941,450)                       0
<INCOME-CONTINUING>                         17,255,776             (3,499,358)
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                26,197,226             (3,499,358)
<EPS-PRIMARY>                                        0                       0
<EPS-DILUTED>                                        0                       0
        

</TABLE>

<PAGE>
                                       
                             LETTER OF TRANSMITTAL
                                      FOR
                           TENDER OF ALL OUTSTANDING
                   10-1/4% SENIOR SUBORDINATED NOTES DUE 2008
                                IN EXCHANGE FOR
                   10-1/4% SENIOR SUBORDINATED NOTES DUE 2008
                                       OF
                          CONTINENTAL RESOURCES, INC.


                  THE EXCHANGE OFFER WILL EXPIRE AT 5:00 P.M.,
     NEW YORK CITY TIME, ON ________________, 1998 (THE "EXPIRATION DATE"),
                 UNLESS EXTENDED BY CONTINENTAL RESOURCES, INC.

                 THE EXCHANGE AGENT FOR THE EXCHANGE OFFER IS:

                    UNITED STATES TRUST COMPANY OF NEW YORK

<TABLE>
      BY MAIL:              BY OVERNIGHT COURIER:            BY HAND:              BY FACSIMILE:
<S>                         <C>                           <C>                      <C>
 United States Trust        United States Trust           United States Trust      (212) 420-6152
  Company of New York        Company of New York           Company of New York     (For Eligible Institutions
 P.O. Box 844               Corporate Trust Operations    111 Broadway             Only)
 Cooper Station              Department                   Lower Level     
 New York, NY 10276-0844    770 Broadway-13th Floor       New York, NY 10006       CONFIRM BY TELEPHONE:
 Attention: Corporate       New York, NY 10003            Attention: Corporate     (800) 548-6565 
  Trust Services                                           Trust Services
 (registered or certified
 mail recommended)
</TABLE>


     DELIVERY OF THIS LETTER OF TRANSMITTAL TO AN ADDRESS OTHER THAN AS SET 
FORTH ABOVE OR TRANSMISSION OF INSTRUCTIONS VIA A FACSIMILE TRANSMISSION TO A 
NUMBER OTHER THAN AS SET FORTH ABOVE WILL NOT CONSTITUTE A VALID DELIVERY.

     The undersigned acknowledges receipt of the Prospectus dated 
______________, 1998 (the "Prospectus") of Continental Resources, Inc. 
("Continental") which, together with this Letter of Transmittal (the "Letter 
of Transmittal"), constitutes Continental's offer (the "Exchange Offer") to 
exchange $1,000 principal amount of 10-1/4% Senior Subordinated Notes due 
2008 (the "New Notes") of Continental for each $1,000 principal amount of 
outstanding 10-1/4% Senior Subordinated Notes due 2008 (the "Old Notes") of 
Continental.  The terms of the New Notes are identical in all material 
respects (including, with respect to interest and upon redemption) to the 
terms of the Old Notes for which they may be exchanged pursuant to the 
Exchange Offer, except that the New Notes have been registered under the 
Securities Act of 1933, as amended, and, therefore, will not bear legends 
restricting the transfer thereof.

     The Exchange Offer is being made pursuant to the Registration Rights 
Agreement dated as of June 21, 1998 (the "Registration Rights Agreement"), 
and all Old Notes validly tendered will be accepted for exchange.  Any Old 
Notes not tendered will remain outstanding and continue to accrue interest, 
but will not retain any rights under the Registration Rights Agreement. 
Holders electing to have Old Notes exchanged 

<PAGE>

pursuant to the Exchange Offer will be required to surrender such Old Notes, 
together with the Letter of Transmittal, to the Exchange Agent at the address 
specified herein prior to the close of business on the Expiration Date.  
Holders will be entitled to withdraw their election, at any time prior to 
5:00 p.m., New York City time on the Expiration Date, by sending to the 
Exchange Agent at the address specified herein a facsimile transmission or 
letter setting forth the name of such Holder, the principal amount of Old 
Notes delivered for exchange and a statement that such Holder is withdrawing 
this election to have such Old Notes exchanged.

     The undersigned has checked the appropriate boxes below and signed this 
Letter of Transmittal to indicate the action the undersigned desires to take 
with respect to the Exchange Offer.

     PLEASE READ THE ENTIRE LETTER OF TRANSMITTAL AND THE PROSPECTUS 
CAREFULLY BEFORE CHECKING ANY BOX BELOW.

     THE INSTRUCTIONS INCLUDED WITH THIS LETTER OF TRANSMITTAL MUST BE 
FOLLOWED. QUESTIONS AND REQUESTS FOR ASSISTANCE OR FOR ADDITIONAL COPIES OF 
THE PROSPECTUS AND THIS LETTER OF TRANSMITTAL MAY BE DIRECTED TO THE EXCHANGE 
AGENT.

     List below the Old Notes to which this Letter of Transmittal relates. If 
the space provided below is inadequate, the Certificate Numbers should be 
listed on a separate signed schedule affixed hereto.

<TABLE>
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                   DESCRIPTION OF OLD NOTES TENDERED HEREWITH
- --------------------------------------------------------------------------------
<S>                             <C>              <C>                 <C>
 Name(s) and Address(es) of     Certificate      Aggregate           Amount 
 Registered Holder(s)           Number(s)        Principal Amount    Tendered*
 (Please fill in)                                Represented by
                                                 Notes






                                Total
- --------------------------------------------------------------------------------
 *    Unless otherwise indicated, the holder will be deemed to have tendered
      all Old Notes included.  See Instruction 2.
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
</TABLE>

     This Letter of Transmittal is to be used if certificates for Old Notes 
are to be forwarded herewith.

     Unless the context requires otherwise, the term "Holder" for purposes of 
this Letter of Transmittal means any person in whose name Old Notes are 
registered or any other person who has obtained a properly completed bond 
power from the registered holder.

     Holders whose Old Notes are not immediately available or who cannot 
deliver their Old Notes and 

                                      -2-
<PAGE>

all other documents required hereby to the Exchange Agent on or prior to the 
Expiration Date may tender their Old Notes according to the guaranteed 
delivery procedure set forth in the Prospectus under the captions "The 
Exchange Offer -- Terms of the Exchange Offer -- Procedures for Tendering Old 
Notes" and "The Exchange Offer -- Terms of the Exchange Offer -- Guaranteed 
Delivery Procedures."

/ /  CHECK HERE IF TENDERED OLD NOTES ARE BEING DELIVERED PURSUANT TO A NOTICE
     OF GUARANTEED DELIVERY AND COMPLETE THE FOLLOWING:

     Name of Registered Holder(s):___________________________________

     Name of Eligible Institution that Guaranteed Delivery:____________________
                                 

/ /  CHECK HERE IF YOU ARE A BROKER-DEALER AND WISH TO RECEIVE 10 ADDITIONAL
     COPIES OF THE PROSPECTUS AND 10 COPIES OF ANY AMENDMENTS OR SUPPLEMENTS
     THERETO.

     Name:__________________________________________________

     Address:_______________________________________________
                                                  



                                      -3-
<PAGE>

             PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY

Ladies and Gentlemen:

     Upon the terms and subject to the conditions of the Exchange Offer, the 
undersigned hereby tenders to Continental the above-described aggregate 
principal amount of Old Notes. Subject to, and effective upon, the acceptance 
for exchange of the Old Notes tendered herewith, the undersigned hereby 
exchanges, assigns and transfers to, or upon the order of, Continental all 
right, title and interest in and to such Old Notes. The undersigned hereby 
irrevocably constitutes and appoints the Exchange Agent as the true and 
lawful agent and attorney-in-fact of the undersigned (with full knowledge 
that said Exchange Agent acts as the agent of the undersigned in connection 
with the Exchange Offer) to cause the Old Notes to be assigned, transferred 
and exchanged. The undersigned represents and warrants that it has full power 
and authority to tender, exchange, assign and transfer the Old Notes and to 
acquire New Notes issuable upon the exchange of such tendered Old Notes, and 
that, when the same are accepted for exchange, Continental will acquire good 
and unencumbered title to the tendered Old Notes, free and clear of all 
liens, restrictions, charges and encumbrances and not subject to any adverse 
claim. The undersigned also warrants that it will, upon request, execute and 
deliver any additional documents deemed by Continental to be necessary or 
desirable to complete the exchange, assignment and transfer of tendered Old 
Notes or to transfer ownership of such Old Notes on the account books 
maintained by The Depository Trust Company.

     The Exchange Offer is subject to certain conditions as set forth in the 
Prospectus under the caption "The Exchange Offer -- Conditions of the 
Exchange Offer." The undersigned recognizes that as a result of these 
conditions (which may be waived, in whole or in part, by Continental) as more 
particularly set forth in the Prospectus, Continental may not be required to 
exchange any of the Old Notes tendered hereby and, in such event, the Old 
Notes not exchanged will be returned to the undersigned at the address shown 
below the signature of the undersigned.

     By tendering, each Holder of Old Notes represents to Continental that 
(i) the New Notes acquired pursuant to the Exchange Offer are being obtained 
in the ordinary course of business of the person receiving such New Notes, 
whether or not such person is such Holder, (ii) neither the Holder of Old 
Notes nor any such other person has an arrangement or understanding with any 
person to participate in the distribution of such New Notes, (iii) if the 
Holder is not a broker-dealer or is a broker-dealer but will not receive New 
Notes for its own account in exchange for Old Notes, neither the Holder nor 
any such other person is engaged in or intends to participate in a 
distribution of the New Notes and (iv) neither the Holder nor any such other 
person is an "affiliate" of Continental within the meaning of Rule 405 under 
the Securities Act of 1933, as amended (the "Securities Act") or, if such 
Holder is an "affiliate," that such Holder will comply with the registration 
and prospectus delivery requirements of the Securities Act to the extent 
applicable. If the tendering Holder is a broker-dealer (whether or not it is 
also an "affiliate" of Continental within the meaning of Rule 405 under the 
Securities Act) that will receive New Notes for its own account in exchange 
for Old Notes where such Old Notes were acquired for its own account as a 
result of market-making or other trading activities, it acknowledges that it 
will deliver a prospectus meeting the requirements of the Securities Act in 
connection with any resale of such New Notes. By acknowledging that it will 
deliver and by delivering a prospectus meeting the requirements of the 
Securities Act in connection with any resale of such New Notes, the 
undersigned is not deemed to admit that it is an "underwriter" within the 
meaning of the Securities Act.

     All authority herein conferred or agreed to be conferred shall survive 
the death, bankruptcy or incapacity of the undersigned and every obligation 
of the undersigned hereunder shall be binding upon the 

                                      -4-
<PAGE>

heirs, personal representatives, executors, administrators, successors, 
assigns, trustees in bankruptcy and other legal representatives of the 
undersigned. Tendered Old Notes may be withdrawn at any time prior to 5:00 
p.m., New York City Time on the Expiration Date.

     Certificates for all New Notes delivered in exchange for tendered Old 
Notes and any Old Notes delivered herewith but not exchanged, in each case 
registered in the name of the undersigned, shall be delivered to the 
undersigned at the address shown below the signature of the undersigned.

                         TENDERING HOLDER(S) SIGN HERE


- ---------------------------------------------------
                                              
- ---------------------------------------------------
            Signature(s) of Holder(s)


Date: ____________________, 1998

(Must be signed by registered Holder(s) exactly as name(s) appear(s) on 
certificate(s) for Old Notes or by any person(s) authorized to become 
registered Holder(s) by endorsements and documents transmitted herewith.  If 
signature by a trustee, executor, administrator, guardian, attorney-in-fact, 
officer of a corporation or other person acting in a fiduciary or 
representative capacity, please set forth the full title of such person.)  
See Instruction 3.

Name(s):
        ---------------------------------------------------------

- -----------------------------------------------------------------
                        (Please Print)


Capacity (full title):                                               
                      -------------------------------------------

Address:                                                             
        ---------------------------------------------------------

- ---------------------------------------------------------  (Including Zip Code)


Area Code and Telephone No.:
                            ---------------------------------------------------

Tax Identification No.:
                       ---------------------------------------------------------

                                      -5-
<PAGE>

                           GUARANTEE OF SIGNATURE(S)
                       (IF REQUIRED -- SEE INSTRUCTION 3)

Authorized Signature:
                      ---------------------------------------------------------

Name:                                                                          
     --------------------------------------------------------------------------

Title:
      -------------------------------------------------------------------------
        
Address:
        -----------------------------------------------------------------------

Name of Firm:
             ------------------------------------------------------------------

Area Code and Telephone No.:
                            ---------------------------------------------------

Dated:_________________, 1998

<TABLE>
- ---------------------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------------------
                     PAYOR'S NAME: CONTINENTAL RESOURCES, INC.
- ---------------------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------------------
<S>                    <C>
SUBSTITUTE             Name (If joint names, list first and circle the name of 
FORM  W-9              the person or entity whose number you enter in Part I 
                       below.)



Department of 
the Treasury
Internal Revenue 
Service


Payor's Request for 
Taxpayer 
Identification 
Number ("TIN") and 
Certification          ----------------------------------------------------------------------------------
                       Address

                       ----------------------------------------------------------------------------------
                       City, state and Zip Code

                       ----------------------------------------------------------------------------------
                       Part I - PLEASE PROVIDE YOUR TAXPAYER IDENTIFICATION    Social Security number 
                       NUMBER ("TIN") IN THE BOX AT RIGHT AND CERTIFY BY       or Employer Identification 
                       SIGNING AND DATING BELOW                                Number

                       ----------------------------------------------------------------------------------
                                                                                                     /  /
                       Part II - If exempt from backup withholding, check the box to the right. 
                       Also provide your TIN in Part I and sign and date this form in Part III.
                       ----------------------------------------------------------------------------------
                       Part III - Under penalties of perjury, I certify that:

                       1. The number shown on this form is my correct taxpayer identification number
                          (or I am waiting for a number to be issued to me), AND
                       2. I am not subject to backup withholding: (a) I am exempt from backup 
                          withholding; or (b) I have not been notified by the Internal Revenue Service 
                          that I am subject to backup withholding as a result of a failure to report all 
                          interest or dividends, or (c) the IRS has notified me that I am no longer 
                          subject to backup withholding.
                       CERTIFICATION INSTRUCTIONS.  You must cross out item 2 above if you have been
                       notified by the IRS that you are currently subject to backup withholding because
                       of underreporting interest or dividends on your tax return.

                       Signature _________________________________  Date  ___________________
- ---------------------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------------------
</TABLE>

Note:     FAILURE TO COMPLETE AND RETURN THIS FORM MAY RESULT IN BACKUP

                                      -6-
<PAGE>

WITHHOLDING OF 31% OF ANY PAYMENTS MADE TO YOU PURSUANT TO THE EXCHANGE 
OFFER. PLEASE REVIEW THE ENCLOSED GUIDELINES FOR CERTIFICATION OF TAXPAYER 
IDENTIFICATION NUMBER ON SUBSTITUTE FORM W-9 FOR ADDITIONAL DETAILS.














                                      -7-
<PAGE>

                                 INSTRUCTIONS

                    FORMING PART OF THE TERMS AND CONDITIONS
                             OF THE EXCHANGE OFFER

     1.   DELIVERY OF THIS LETTER OF TRANSMITTAL AND CERTIFICATES. 
Certificates for all physically delivered Old Notes, as well as a properly 
completed and duly executed copy of this Letter of Transmittal or facsimile 
thereof, and any other documents required by this Letter of Transmittal, must 
be received by the Exchange Agent at any of its addresses set forth herein on 
or prior to the Expiration Date.

     THE METHOD OF DELIVERY OF OLD NOTES, THIS LETTER OF TRANSMITTAL AND ALL 
OTHER REQUIRED DOCUMENTS TO THE EXCHANGE AGENT IS AT THE ELECTION AND RISK OF 
THE HOLDER AND, EXCEPT AS OTHERWISE PROVIDED BELOW, THE DELIVERY WILL BE 
DEEMED MADE ONLY WHEN ACTUALLY RECEIVED BY THE EXCHANGE AGENT. INSTEAD OF 
DELIVERY BY MAIL, IT IS RECOMMENDED THAT HOLDERS USE AN OVERNIGHT OR HAND 
DELIVERY SERVICE.

     Holders whose Old Notes are not immediately available or who cannot 
deliver their Old Notes and all other required documents to the Exchange 
Agent on or prior to the Expiration Date may tender their Old Notes pursuant 
to the guaranteed delivery procedure set forth in the Prospectus under "The 
Exchange Offer -- Terms of the Exchange Offer -- Guaranteed Delivery 
Procedures." Pursuant to such procedure: (i) such tender must be made by or 
through an Eligible Institution (as defined in the Prospectus); (ii) on or 
prior to the Expiration Date, the Exchange Agent must have received from such 
Eligible Institution a letter, telegram or facsimile transmission setting 
forth the name and address of the tendering Holder, the name(s) in which such 
Old Notes are registered, and the certificate number(s) of the Old Notes to 
be tendered; and (iii) all tendered Old Notes as well as this Letter of 
Transmittal and all other documents required by this Letter of Transmittal 
must be received by the Exchange Agent within three New York Stock Exchange 
trading days after the date of execution of such letter, telex, telegram or 
facsimile transmission, all as provided in the Prospectus under the caption 
"The Exchange Offer -- Terms of the Exchange Offer -- Guaranteed Delivery 
Procedures."

     No alternative, conditional, irregular or contingent tenders will be 
accepted.  All tendering Holders, by execution of this Letter of Transmittal 
(or facsimile thereof), shall waive any right to receive notice of the 
acceptance of the Old Notes for exchange.

     2.   PARTIAL TENDERS; WITHDRAWALS.  If less than the entire number of 
Old Notes evidenced by a submitted certificate is tendered, the tendering 
Holder must fill in the number of shares tendered in the column entitled 
"Amount Tendered."  A newly issued certificate for the number of Old Notes 
submitted but not tendered will be sent to such Holder as soon as practicable 
after the Expiration Date.  All Old Notes delivered to the Exchange Agent 
will be deemed to have been tendered unless otherwise indicated.  To withdraw 
a tender of Old Notes in the Exchange Offer, a written or facsimile 
transmission notice of withdrawal must be received by the Exchange Agent at 
its address set forth herein prior to 5:00 p.m., New York City time, on the 
Expiration Date. Any such notice of withdrawal must (i) specify the name of 
the person having deposited the Old Notes to be withdrawn (the "Depositor"), 
(ii) identify the Old Notes to be withdrawn (including the certificate number 
or number of such Old Notes), (iii) contain a statement that such Holder is 
withdrawing its election to have such Old Notes exchanged, (iv) be signed by 
the Holder in the same manner as the original signature on the Letter of 
Transmittal by which such Old Notes were tendered (including any required 
signature guarantees) or be accompanied by documents of transfer 

                                      -8-
<PAGE>

sufficient to have the Trustee with respect to the Old Notes register the 
transfer of such Old Notes in the name of the person withdrawing the tender 
and (v) specify the name in which any such Old Notes are to be registered, if 
different from that of the Depositor. If Old Notes have been tendered 
pursuant to the procedure for book-entry transfer, any notice of withdrawal 
must specify the name and number of the account at the book-entry transfer 
facility. All questions as to the validity, form and eligibility (including 
time of receipt) of such notices will be determined by Continental, whose 
determination shall be final and binding on all parties. Any Old Notes so 
withdrawn will be deemed not to have been validly tendered for purposes of 
the Exchange Offer and no New Notes will be issued with respect thereto 
unless the Old Notes so withdrawn are validly retendered. Any Old Notes which 
have been tendered but which are not accepted for exchange will be returned 
to the Holder thereof without cost to such Holder as soon as practicable 
after withdrawal, rejection of tender or termination of the Exchange Offer. 
Properly withdrawn Old Notes may be retendered by following one of the 
procedures described herein at any time prior to the business day prior to 
the Expiration Date.

     3.   SIGNATURE ON THIS LETTER OF TRANSMITTAL; WRITTEN INSTRUMENTS AND 
ENDORSEMENTS; GUARANTEE OF SIGNATURES. If this Letter of Transmittal is 
signed by the registered Holder(s) of the Old Notes tendered hereby, the 
signature must correspond with the name(s) as written on the face of 
certificates without alteration, enlargement or any change whatsoever.

     If tendered Old Notes are registered in the name of the signer of the 
Letter of Transmittal and the New Notes to be issued in exchange therefor are 
to be issued (and any untendered Old Notes are to be reissued) in the name of 
the registered Holder (including any participant in The Depository Trust 
Company (also referred to as a book-entry facility) whose name appears on a 
security listing as the owner of Old Notes), the signature of such signer 
need not be guaranteed. In any other case, the tendered Old Notes must be 
endorsed or accompanied by written instruments of transfer in form 
satisfactory to Continental and duly executed by the registered Holder and 
the signature on the endorsement or instrument of transfer must be guaranteed 
by an eligible guarantor institution which is a member of one of the 
following recognized signature guarantee programs (an "Eligible 
Institution"): (i) The Securities Transfer Agents Medallion Program (STAMP), 
(ii) The New York Stock Exchange Medallion Signature Program (MSF), or (iii) 
The Stock Exchange Medallion Program (SEMP).

     If the New Notes or Old Notes not exchanged are to be delivered to an 
address other than that of the registered Holder appearing on the note 
register for the Old Notes, the signature in the Letter of Transmittal must 
be guaranteed by an Eligible Institution.

     Endorsements on certificates or signatures on separate written 
instruments of transfer or exchange required by this Instruction 3 must be 
guaranteed by an Eligible Institution.

     If any of the Old Notes tendered hereby are owned of record by two or 
more joint owners, all such owners must sign this Letter of Transmittal.

     If a number of Old Notes registered in different names are tendered, it 
will be necessary to complete, sign and submit as many separate copies of 
this Letter of Transmittal as there are different registrations of Old Notes.

                                      -9-
<PAGE>

     When this Letter of Transmittal is signed by the registered Holder or 
Holders of Old Notes listed and tendered hereby, no endorsements of 
certificates or separate written instruments of transfer or exchange are 
required.

     If this Letter of Transmittal is signed by a person other than the 
registered Holder or Holders of the Old Notes listed, such Old Notes must be 
endorsed or accompanied by separate written instruments of transfer or 
exchange in form satisfactory to Continental and duly executed by the 
registered Holder or Holders, in either case signed exactly as the name or 
names of the registered Holder or Holders appear(s) on the Old Notes.

     If this Letter of Transmittal, any certificates or separate written 
instruments of transfer or exchange are signed by trustees, executors, 
administrators, guardians, attorneys-in-fact, officers of corporations or 
others acting in a fiduciary or representative capacity, such persons should 
so indicate when signing, and, unless waived by Continental, proper evidence 
satisfactory to Continental of their authority so to act must be submitted.

     4.   TRANSFER TAXES.  Continental shall pay all transfer taxes, if any, 
applicable to the exchange of Old Notes pursuant to the Exchange Offer.  If, 
however, certificates representing New Notes, or Old Notes for principal 
amounts not tendered or accepted for exchange, are to be delivered to, or are 
to be issued in the name of, any person other than the registered Holder of 
the Old Notes tendered hereby, or if a transfer tax is imposed for any reason 
other than the exchange of Old Notes pursuant to the Exchange Offer, then the 
amount of any such transfer taxes (whether imposed on the registered Holder 
or any other person) will be payable by the tendering Holder.  If 
satisfactory evidence of payment of such taxes or exemption therefrom is not 
submitted herewith, the amount of such transfer taxes will be billed directly 
to such tendering Holder.

     Except as provided in this Instruction 4, it will not be necessary for 
transfer tax stamps to be affixed to the Old Notes listed in this Letter of 
Transmittal.

     5.   WAIVER OF CONDITIONS.  Continental reserves the absolute right to 
waive, in whole or in part, any of the conditions to the Exchange Offer set 
forth in the Prospectus.

     6.   MUTILATED, LOST, STOLEN OR DESTROYED NOTES.  Any Holder whose Old 
Notes have been mutilated, lost, stolen or destroyed should contact the 
Exchange Agent at the address indicated above for further instructions.

     7.   REQUESTS FOR ASSISTANCE OR ADDITIONAL COPIES.  Questions relating 
to the procedure for tendering and other questions relating to the Exchange 
Offer, as well as requests for assistance or additional copies of the 
Prospectus and this Letter of Transmittal, may be directed to the Exchange 
Agent at the address and telephone number set forth above and in the 
Prospectus.

     8.   IRREGULARITIES.  All questions as to the validity, form, 
eligibility (including time of receipt), and acceptance of Letters of 
Transmittal or Old Notes will be resolved by Continental, whose determination 
will be final and binding.  Continental reserves the absolute right to reject 
any or all Letters of Transmittal or tenders that are not in proper form or 
the acceptance of which would, in the opinion of Continental's counsel, be 
unlawful.  Continental also reserves the right to waive any irregularities or 
conditions of tender as to the particular Old Notes covered by any Letter of 
Transmittal or tendered pursuant to such Letter of Transmittal.  

                                      -10-
<PAGE>

None of Continental, the Exchange Agent or any other person will be under any 
duty to give notification of any defects or irregularities in tenders or 
incur any liability for failure to give any such notification.  Continental's 
interpretation of the terms and conditions of the Exchange Offer shall be 
final and binding.

     9.   DEFINITIONS.  Capitalized terms used in this Letter of Transmittal 
and not otherwise defined have the meanings given in the Prospectus.

     10.  TAX IDENTIFICATION NUMBER.  Federal income tax law requires that a 
Holder of any Old Notes which are accepted for exchange must provide 
Continental (as payor) with its correct taxpayer identification number 
("TIN"), which, in the case of a Holder who is an individual, is his or her 
social security number. If Continental is not provided with the correct TIN, 
the Holder may be subject to a $50 penalty imposed by the Internal Revenue 
Service. (If withholding results in an over-payment of taxes, a refund may be 
obtained.) Certain Holders (including, among others, all corporations and 
certain foreign individuals) are not subject to these backup withholding and 
reporting requirements; however, these Holders still must submit the 
Substitute Form W-9.  See the enclosed "Guidelines for Certification of 
Taxpayer Identification Number on Substitute Form W-9" for additional 
instructions. 

     To prevent backup withholding, each tendering Holder must provide such 
Holder's correct TIN by completing the Substitute Form W-9 set forth herein, 
certifying that the TIN provided is correct (or that such Holder is awaiting 
a TIN), and that (i) the Holder has not been notified by the Internal Revenue 
Service that such Holder is subject to backup withholding as a result of 
failure to report all interest or dividends or (ii) the Internal Revenue 
Service has notified the Holder that such Holder is no longer subject to 
backup withholding. The Form must be signed, even if the Holder is exempt 
from backup withholding. If the Old Notes are registered in more than one 
name or are not in the name of the actual owner, consult the enclosed 
"Guidelines for Certification of Taxpayer Identification Number on Substitute 
Form W-9" for information on which TIN to report.

     Continental reserves the right in its sole discretion to take whatever 
steps are necessary to comply with its obligation regarding backup 
withholding. 

     IMPORTANT:  THIS LETTER OF TRANSMITTAL OR A FACSIMILE THEREOF (TOGETHER 
WITH CERTIFICATES FOR OLD NOTES AND ALL OTHER REQUIRED DOCUMENTS) OR A NOTICE 
OF GUARANTEED DELIVERY MUST BE RECEIVED BY THE EXCHANGE AGENT ON OR PRIOR TO 
THE EXPIRATION DATE.

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