KELLEY OIL & GAS CORP
8-K, 1997-12-16
NATURAL GAS TRANSMISSION
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                                 UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION

                           WASHINGTON, D.C.  20549

                                   FORM 8-K

                CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d)
                    OF THE SECURITIES EXCHANGE ACT OF 1934

      DATE OF REPORT (DATE OF EARLIEST EVENT REPORTED): DECEMBER 1, 1997

                         KELLEY OIL & GAS CORPORATION

            (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

           DELAWARE                0-25214                76-0447267
 (STATE OR OTHER JURISDICTION     (COMMISSION          (I.R.S. EMPLOYER
       OF INCORPORATION)         FILE NUMBER)         IDENTIFICATION NO.)

          601 JEFFERSON ST.
             SUITE 1100
           HOUSTON, TEXAS                                 77002
(ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)               (ZIP CODE)

      Registrant's telephone number, including area code: (713) 652-5200
<PAGE>
ITEMS 2 AND 5.  ACQUISITION OF ASSETS AND OTHER EVENTS.

      As previously reported in a Current Report of Kelley Oil & Gas Corporation
(the "Company") on Form 8-K dated October 21, 1997, on October 21, 1997 the
Company entered into a Purchase and Sale Agreement (the "Agreement") with SCANA
Petroleum Resources, Inc., a South Carolina corporation ("SPR"), providing,
among other things, for the Company's purchase of substantially all of SPR's
assets, including its oil and gas properties, exploratory interests, and
associated obligations, in exchange for $110 million (the "Acquisition"),
subject to adjustment as provided by the Agreement. As provided in the
Agreement, the closing and effective date of the Acquisition was December 1,
1997. The purchase price of the Acquisition was funded by the Company's credit
facility, as amended December 1, 1997, involving Texas Commerce Bank National
Association, as agent, and Chase Securities Inc., as arranger and syndication
agent, and the exercise by Contour Production Company L.L.C. ("Contour") of its
Option Agreement, dated as of February 15, 1996 (the "Option Agreement"), to
purchase 27 million shares of the Company's Common Stock at $1.00 per share, the
price established at the time of the Option Agreement. The Company's Acquisition
purchase price offer was based on its valuation of the assets to be acquired and
the associated contractual commitments, including considering its assessment of
the various risks associated with conducting oil and gas exploration and
production operations. This description of the Acquisition is subject to and is
qualified in its entirety by reference to, the provisions of the Agreement,
which is filed as an Exhibit to this Current Report on Form 8-K.

      Under an indenture, dated as of December 15, 1992 between Kelley Oil & Gas
Partners, Ltd. (the "Partnership") and United States Trust Company of New York
for the 7 7/8% Convertible Subordinated Notes due 1999, as amended (the
"Indenture"), a "Change in Control" as defined in the Indenture shall have been
deemed to occur if, among other things, any person other than Kelley Oil
Corporation ("Kelley Oil") or its successor or affiliate becomes the beneficial
owner of securities representing 50% or more of the equity interests in the
Partnership or 50% or more of the voting power of Kelley Oil or its successor.
In March 1996, the Partnership was merged into the Company, and an amendment to
the Indenture was executed which, among other things, named the Company as the
successor to the Partnership. With the purchase by Contour of 27 million shares
of the Company's common stock, each holder of notes issued under the Indenture,
is being afforded the right, at the holder's option, subject to the terms and
conditions of the Indenture, to require the Company to redeem all or any part
(provided that the principal amount is $1,000 or an integral multiple thereof)
of the holder's notes on the date that is 35 business days after the occurrence
of the Change of Control at a cash price equal to the sum of (i) the issue price
of the notes being redeemed, (ii) the accrued original issue discount thereon to
the date fixed for redemption, and (iii) accrued and unpaid interest thereon to
but excluding the date fixed for redemption.

FORWARD-LOOKING STATEMENTS

      STATEMENTS MADE HEREIN THAT ARE FORWARD-LOOKING IN NATURE ARE INTENDED TO
BE "FORWARD-LOOKING STATEMENTS" WITHIN THE MEANING OF SECTION 21E OF THE
SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. ALTHOUGH THE COMPANY BELIEVES THAT
THE EXPECTATIONS DESCRIBED HEREIN ARE REASONABLE, THE ACTUAL RESULTS MAY DIFFER
MATERIALLY FROM ANY OR ALL ANTICIPATED RESULTS DUE TO FINANCIAL AND OTHER
ECONOMIC CONDITIONS AND OTHER RISKS, UNCERTAINTIES AND CIRCUMSTANCES PARTLY OR
TOTALLY OUTSIDE THE CONTROL OF THE COMPANY, INCLUDING THOSE ATTRIBUTABLE TO THE
CONDITIONS AND TERMS SET FORTH IN THE AGREEMENT, SUCH AS A CONSEQUENCE OF THE
DUE DILIGENCE BEING PERFORMED. WORDS SUCH AS "ANTICIPATED," "EXPECT,"
"ESTIMATE," "PROJECT" AND SIMILAR EXPRESSIONS ARE INTENDED TO IDENTIFY
FORWARD-LOOKING STATEMENTS.

                                      1
<PAGE>
ITEM 7.     FINANCIAL STATEMENTS AND EXHIBITS

      (a)   Financial statements are not included in this filing; but will be
            filed not later than February 16, 1998, by amendment to this Current
            Report on Form 8-K.

      (b)   Pro forma financial information is not included in this filing; but
            will be filed not later than February 16, 1998, by amendment to this
            Current Report on Form 8-K.

      (c)   EXHIBITS.

      EXHIBIT
      NUMBER   EXHIBIT
      ------   -------
      10.1     Option Agreement dated February 15, 1996 between the Company and
               Contour Production Company L.L.C. (incorporated by reference to
               Exhibit 10.1 to the Company's Current Report on Form 8-K (file
               no. 0-25214) dated February 15, 1996).

      10.2     Purchase and Sale Agreement, dated October 21, 1997, between the
               Company and SCANA Petroleum Resources, Inc.

      10.3     Company's Current Report on Form 8-K (file no. 0-2514) dated 
               October 21, 1997.

      99.1     Amended and Restated Credit Agreement dated December 1, 1997
               among the Company, Kelley Oil Corporation and Kelley Operating
               Company, Ltd., as Borrowers; Concorde Gas Marketing, Inc., Kelley
               Partners 1992 Development Drilling Joint Venture, Kelley Partners
               1994 Development Drilling Joint Venture, Kelley Partners 1992
               Development Drilling Program and Kelley Partners 1994 Development
               Drilling Program, as Guarantors; Texas Commerce Bank National
               Association, as Agent; Chase Securities Inc., as Arranger and
               Syndication Agent; and certain other banking institutions.

                                  SIGNATURES

      Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

                                                KELLEY OIL & GAS CORPORATION

Date: December 16, 1997                         By:  /s/ DAVID C. BAGGETT
                                                         David C. Baggett,
                                                      Senior Vice President &
                                                      Chief Financial Officer
                                                     (Duly Authorized Officer)

                                      2

                                                                    EXHIBIT 10.2

                           PURCHASE AND SALE AGREEMENT

        THIS PURCHASE AND SALE AGREEMENT ("Agreement") is made and entered into
this 21st day of October, 1997, by and between SCANA Petroleum Resources, Inc.,
a South Carolina Corporation ("Seller") and Kelley Oil & Gas Corporation, a
Delaware Corporation ("Purchaser").

 Seller and Purchaser may hereinafter be referred to individually as "Party" or
collectively as "Parties".

        WHEREAS, Purchaser desires to purchase and Seller desires to sell all of
Seller's right, title and interest in and to certain oil, gas and mineral leases
and associated assets and contract rights; and

        WHEREAS, Seller and Purchaser desire to set forth herein the terms and 
provisions of their agreements and understandings;

        NOW, THEREFORE, in consideration of the foregoing, of the mutual
promises hereinafter set forth and for other good and valuable consideration,
the receipt and sufficiency of which are hereby acknowledged, the Parties ,
intending to be legally bound, hereby agree as follows:

                                    ARTICLE I
                          GENERAL TERMS AND CONDITIONS

1.01  SALE OF SUBJECT PROPERTIES.

               1.01.01 Seller covenants and agrees to sell to Purchaser, and
        Purchaser covenants and agrees to buy from Seller all of Seller's right,
        title and interest in and to the properties more specifically described
        below (hereinafter the "Subject Properties"):

                      (A) The oil, gas and mineral leases, mineral interests and
               operating rights (the "Leases") as set forth on Exhibit "A"
               hereto, and the wells located thereon or on lands pooled,
               unitized or communitized therewith (the "Wells") as set forth on
               Exhibit "A-1" hereto, together with all associated rights (the
               Leases and Wells shall collectively be referred to as the "Oil
               and Gas Properties").

                      (B) All presently existing and valid oil, gas or mineral
               unitization, pooling, operating and communitization agreements,
               declarations and orders, and the units created thereby

                                        1
<PAGE>
               including, without limitation, all units voluntarily formed or
               formed under orders, regulations, rules or other official acts of
               any federal, state or other governmental authority having
               jurisdiction, insofar and only insofar as they relate to the Oil
               and Gas Properties.

                      (C) All presently existing and valid oil and gas sales,
               purchase, transportation, gathering, balancing, exchange and
               processing contracts, casinghead gas contracts, operating
               agreements, farmout and farmin agreements, production handling
               agreements, compression agreements, joint venture agreements,
               participation agreements and other agreements and instruments
               (including without limitation, the Exploration Agreements listed
               on Exhibit G hereto, future interests, reversionary rights and
               deferred interests), insofar and only insofar as they relate to
               the Oil and Gas Properties (the "Contracts") together with all
               franchises, licenses, permits, approvals, consents, certificates
               and other authorizations and other rights granted by governmental
               authorities and all certificates of convenience or necessity,
               immunities, privileges, grants and other rights insofar and only
               insofar as any of them relate to the Oil and Gas Properties and
               are assignable by Seller (the "Permits"). Notwithstanding the
               foregoing all former and existing agreements between Seller and
               any Affiliate (as hereafter defined) of Seller shall not be
               considered as Contracts or assigned to Purchaser, save and except
               only that certain Production Handling Agreement by and between
               SCANA Energy Marketing, Inc. and Seller dated April 1, 1997,
               concerning Seller's handling of certain gas and liquid volumes at
               Seller's Vermilion 217 A Platform. For all purposes hereof, the
               term "Affiliate" shall mean, as to any person, any other person
               that directly or indirectly (through one or more intermediaries
               or otherwise) controls, is controlled by, or is under common
               control with such person.

                      (D) All personal property, improvements, lease and well
               equipment, easements, licenses and permits (to the extent they
               are assignable by Seller), servitudes and rights-of-way
               (including as applicable, but not limited to, any wells, tanks,
               boilers, buildings, platforms, flowlines, fixtures, machinery,
               injection facilities, saltwater disposal facilities, compression
               facilities, inventories of tubular goods and other equipment,
               supplies and tools, gathering systems, power lines, telephone and
               telegraph lines, roads and other appurtenances and easements)
               owned by Seller and located on the Oil and Gas Properties as of
               the Effective Time (as hereinafter defined) and which are being
               used or held for use by Seller in connection with the
               exploration, development, operation or maintenance of the Oil and
               Gas

                                             2
<PAGE>
               Properties, or any unit or units in which part or parts of the
               Oil and Gas Properties may be included, or being used or held for
               use by Seller in connection with the production, treating,
               storing, transportation or marketing of oil, gas and the
               minerals, produced from or allocated to the Oil and Gas
               Properties or such unit or units.

                      (E) The seismic contracts and associated data owned by
               Seller reflected on Exhibit "A-2" attached hereto, to the extent
               the transfer thereof is not prohibited or restricted by law or
               contract.

                      (F) All lease files, land files, well files, prospect
               files, gas and oil sales contract files, gas processing files,
               division order files, abstracts, title opinions and all other
               books, files and records, information and data and all rights
               thereto of Seller insofar as the same are directly related to and
               necessary or useful to the realization of any value by Purchaser
               of the Oil and Gas Properties and to the extent the transfer
               thereof is not prohibited or restricted by law or contract.

                      (G) All proceeds of and other rights relating to insurance
               or condemnation payable or accruing by reason of the loss of,
               damage to, diminution in the value of or income or revenues from,
               or taking of all or any part of the Subject Properties occurring
               after the Effective Time or relating or attributable to the
               period subsequent to the Effective Time save and except any
               payments or other consideration received by Seller associated
               with or arising from any suit or claim or other cause listed on
               Exhibit "B-1" hereto.

               1.01.02 The Subject Properties shall not include any of Seller's
        right, title and/or interest in any of the following (referred to herein
        as the "Excluded Assets"); (A) those assets described on Exhibit "B";
        (B) Affiliate contracts unless specified in Section 1.01.01(C) above;
        (C) all trade credits and all accounts, instruments and general
        intangibles (as such terms are defined in the Uniform Commercial Code)
        attributable to the Subject Properties with respect to any period of
        time prior to the Effective Time; (D) all claims and causes of action of
        Seller (i) arising from acts, omissions or events, or damage to or
        destruction of property, occurring prior to the Effective Time, (ii)
        arising under or with respect to any contracts related to the Subject
        Properties that are attributable to periods of time prior to the
        Effective Time (including claims for adjustments or refunds), or (iii)
        with respect to any of the Excluded Assets; (E) all rights and interests
        of Seller (i) under any policy or agreement of insurance or indemnity,
        (ii) under any bond, or (iii) to any insurance or condemnation

                                             3
<PAGE>
        proceeds or awards arising, in each case, from acts, omissions or
        events, or damage to or destruction of property, occurring prior to the
        Effective Time; (F) all oil, gas or other hydrocarbons produced and sold
        from the Oil and Gas Properties with respect to all periods prior to the
        Effective Time, together with all proceeds from or of such substances;
        (G) claims of Seller for refunds or loss carry forwards with respect to
        (i) production or any other taxes attributable to any period prior to
        the Effective Time, (ii) income or franchise taxes, or (iii) any taxes
        attributable to the Excluded Assets; (H) all amounts due or payable to
        Seller as adjustments to insurance premiums related to the Subject
        Properties with respect to any period prior to the Effective Time; (I)
        all proceeds, income or revenues (and any security or other deposits
        made) attributable to (i) the Subject Properties for any period prior to
        the Effective Time, or (ii) any Excluded Assets; (J) all of Seller's
        proprietary computer software, patents, trade secrets, copyrights,
        names, trademarks, logos and other intellectual property; (K) all of
        Seller's interpretations of geological and geophysical data; (L) all
        documents and instruments of Seller that may be protected by an
        attorney-client privilege, provided, that if any such document or
        instrument relates directly to the Subject Properties and is withheld
        from Purchaser based on this provision, Seller shall inform Purchaser of
        the nature of the instrument, its date, the parties to it and a general
        statement describing the content thereof; (M) all audit rights with
        respect to any period prior to the Effective Time; and (N) all claims,
        causes of action and other rights related to or arising in connection
        with the lawsuits described on Exhibit "B-1."

               1.01.03 The conveyance of the Subject Properties shall be
        evidenced by assignment ("Assignment") using one of the forms of
        assignment attached hereto as Exhibits "C" through "C-4" as applicable,
        together with all special federal, state and tribal (if any) assignment
        forms as may be required by applicable law, rule or regulation to be
        executed in connection with the conveyance of specific Oil and Gas
        Properties, provided that the terms and provisions of the Assignment
        shall control as to any conflict between the Assignment and any such
        special assignment forms. Said conveyance shall be effective as of 7:00
        a.m. Central Standard Time on December 1, 1997 (the "Effective Time"),
        and shall convey Seller's interest in the Subject Properties to
        Purchaser or Purchaser's Nominee (as hereinafter defined) without
        warranty of title expressed or implied except for claims arising by,
        through or under Seller, but not otherwise.

1.02 CONSIDERATION. The purchase price to be paid by Purchaser for the Subject
Properties shall be One Hundred and Ten Million Dollars ($110,000,000.00)
(hereinafter called the "Base Purchase Price"), which shall be payable by wire
transfer in immediately available funds and actually

                                             4
<PAGE>
received in Seller's bank account on or before 3:00 p.m. Central Standard Time,
on the date on which Closing occurs (the "Closing Date"). The Base Purchase
Price shall be reduced or increased based on the adjustments to be made pursuant
to Section 1.04 and as otherwise provided for in this Agreement (the "Adjusted
Purchase Price"). The Base Purchase Price shall be allocated (the "Allocated
Values") as set forth on Exhibit "D" attached hereto. Seller and Purchaser agree
and stipulate that such Allocated Values have been established solely for use in
calculating adjustments to the Base Purchase Price as provided herein, such
schedule of Allocated Values being solely for the convenience of the Parties.
Seller and Purchaser do not intend that such schedule of Allocated Values be
treated or interpreted to constitute an allocation of the Base Purchase Price
among the Subject Properties for federal or state income tax purposes.

1.03 DEPOSIT. Contemporaneously with the execution of this Agreement, Purchaser
shall pay to Seller the sum of Five Million and Five Hundred Thousand Dollars
($5,500,000.00) (hereinafter called the "Deposit"). If the sale hereunder is
consummated in accordance with the terms hereof, the Deposit, without interest,
if any, shall be applied to the Base Purchase Price to be paid by Purchaser at
Closing. In the event (A) this Agreement is terminated by Purchaser in writing
in accordance with the terms of Section 10.01 hereof; (B) this Agreement is
terminated by Seller in writing solely because the conditions to Closing
specified in Section 5.01.02 or 5.01.05 are not satisfied or (C) the transaction
contemplated hereby fails to close due solely to the fault of Seller, which
occurs in the absence of a default by Purchaser, then the Deposit, without
interest, if any, shall be returned to Purchaser within three (3) business days
of the resulting termination of this Agreement. In the event the transaction
contemplated by this Agreement does not close on or before December 31, 1997,
for any reason whatsoever (including the fault of Purchaser), except those
specified in the preceding sentence, the Deposit plus interest, if any, shall be
forfeited by Purchaser and permanently retained by Seller as liquidated damages,
as Seller's sole and exclusive remedy for such failure to close (including
default by Purchaser), all other remedies for such failure to close being
expressly waived by Seller. THE PARTIES HEREBY ACKNOWLEDGE THAT THE EXTENT OF
DAMAGES TO SELLER OCCASIONED BY THE FAILURE OF THIS TRANSACTION TO BE
CONSUMMATED WOULD BE IMPOSSIBLE OR EXTREMELY DIFFICULT TO ASCERTAIN AND THAT THE
AMOUNT OF THE DEPOSIT IS A FAIR AND REASONABLE ESTIMATE OF SUCH DAMAGES UNDER
THE CIRCUMSTANCES AND DOES NOT CONSTITUTE A PENALTY. The restriction of Seller's
damages hereunder to the amount of the Deposit shall apply only to damages
arising solely from the failure to close the transaction contemplated hereby and
shall not apply to damages arising from any other act or failure to act by
Purchaser (such as, for example, breach of confidentiality agreements between
Seller and Purchaser).

                                             5
<PAGE>
1.04    ADJUSTMENTS TO THE BASE PURCHASE PRICE.

               1.04.01 Appropriate adjustments shall be made between Purchaser
        and Seller so that (A) all expenses (including, without limitation, all
        drilling costs, all capital expenditures, and all overhead charges under
        applicable operating agreements, whether Seller is the Operator or
        whether such operating agreements are with third parties or related
        entities, and all other overhead charges actually charged by third
        parties or which would be due to Seller as Operator under standard
        operating agreement provisions for the area in which the property is
        located) which are incurred in the operation of the Subject Properties
        before the Effective Time will be borne by Seller and all proceeds (net
        of applicable production, severance and similar taxes) from the sale of
        oil, gas and/or other minerals produced therefrom before the Effective
        Time will be owned by Seller, and (B) all expenses (including, without
        limitation, all capital expenditures, all drilling costs, and all
        overhead charges under applicable operating agreements, whether such
        operating agreements are with third parties or related entities, and all
        other overhead charges actually charged by third parties) which are
        incurred in the operation of the Subject Properties after the Effective
        Time will be borne by Purchaser and all proceeds (net of applicable
        production, severance and similar taxes) from the sale of oil, gas
        and/or other minerals produced therefrom after the Effective Time will
        be owned by Purchaser. It is agreed that, in making such adjustments:
        (X) oil which was produced from the Subject Properties and which was, on
        the Effective Time, stored in tanks located on the Subject Properties
        (or located elsewhere but used by Seller to store oil produced from the
        Subject Properties prior to delivery to oil purchaser) and above
        pipeline connections shall be deemed to have been produced before the
        Effective Time, and (Y) ad valorem taxes assessed with respect to a
        period which the Effective Time splits shall be prorated based on the
        number of days in such period which fall on each side of the Effective
        Time (with the day on which the Effective Time falls being counted in
        the period after the Effective Time), and (Z) no consideration shall be
        given to the local, state or federal income tax liabilities of any
        Party. Notwithstanding the provisions of this Section 1.04.01 there
        shall be additional adjustments as may be required pursuant to Section
        4.02 or Article VII, or as otherwise provided in this Agreement. Seller
        shall deliver to Purchaser not less than two business days before the
        Closing Date a statement (the "Closing Statement") setting forth
        Seller's best estimate of adjustments to the Base Purchase Price as
        provided for in this Section 1.04.01 and elsewhere in this Agreement.
        The Closing Statement shall be prepared in accordance with generally
        accepted accounting principles. On or before 120 days after Closing,
        Purchaser and Seller shall determine the final amounts of such
        adjustments, and make such final adjustments by appropriate written
        notice and payments from Seller to

                                             6
<PAGE>
        Purchaser or from Purchaser to Seller. Payments resulting from such
        invoices shall be made within fifteen (15) days of the date of such
        invoice, and if not timely paid, the balance due shall bear interest at
        the rate of 1.5% per month from date of invoice until paid.

               1.04.02 Attached hereto as Exhibit "E" is a schedule showing with
        respect to the Subject Properties as of August 31, 1997, to the best of
        Seller's knowledge (A) the total amount of overproduction of gas
        attributable to Seller's interest (e.g. volumes of gas taken from the
        Wells on the Subject Properties, or on lands unitized therewith, by
        Seller in excess of those volumes which Seller's interest would entitle
        it to receive) and (B) the total amount of underproduction of gas
        attributable to Seller's interest (e.g. volumes of gas not taken from
        the Wells on the Subject Properties, or on lands unitized therewith, by
        Seller despite Seller's interest in and right to receive such volumes).
        The Parties acknowledge and agree that the calculation and agreement
        herein as to the Base Purchase Price has taken such imbalances through
        the Effective Time into account and that no adjustment to the Base
        Purchase Price shall be made in consideration of any additions,
        deletions, or other changes to the imbalances with respect to the
        Subject Properties for any period. At and after Closing Purchaser shall
        receive the benefit of and shall bear all obligations of any and all
        imbalances attributable to the Subject Properties regardless of when
        such imbalances arose or accrued.

               1.04.03 If the Parties cannot agree in good faith as to the
        amount or validity of any adjustment claimed by either Party under this
        Section 1.04, such dispute and supporting documentation shall be
        submitted to arbitration pursuant to the provisions of Article XI.

1.05 CLOSING. The completion of the purchase and sale of the Subject Properties
as contemplated by this Agreement, as well as the physical act or acts of
execution and delivery of the documents contemplated hereby and delivery of
consideration as provided above (the "Closing") shall occur at the offices of
Seller, Two Allen Center, 1200 Smith Street, Suite 500, Houston, Texas, at a
time and date mutually acceptable to Seller and Purchaser on or before December
1, 1997 (with the Parties agreeing to a pre-closing of the transaction on or
before November 26, 1997).

                                   ARTICLE II
                         REPRESENTATIONS AND WARRANTIES

2.01 REPRESENTATIONS AND WARRANTIES OF SELLER. Seller represents and warrants to
Purchaser that the following are true and correct as of the date of this
Agreement and will be true at Closing as if made on that date:

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<PAGE>
               2.01.01 Seller is a South Carolina corporation which:

                      (A) is duly organized, validly existing and in good
               standing under the laws of the state of its incorporation;

                      (B) has taken all requisite steps to insure its ability to
               legally conduct business in the places and manner as required to
               own, operate and sell the Subject Properties;

                      (C) has full corporate power and authority to carry on its
               business as now being conducted and is duly licensed or qualified
               to do business and is in good standing in each jurisdiction in
               which the Subject Properties are located; and

                      (D) has full corporate power and authority and is duly
               authorized by appropriate action of the board of directors,
               shareholders, partners, venturers or others, as the case may be,
               to enter into this Agreement, to perform the obligations
               hereunder, and to convey to Purchaser the Subject Properties.

               2.01.02 This Agreement has been duly and validly executed and
        delivered by Seller and constitutes, and all other agreements
        contemplated herein, when entered into, will constitute, the legal,
        valid and binding agreements and obligations of Seller enforceable
        against Seller in accordance with their respective terms. Seller has the
        right to convey the Subject Properties to Purchaser or Purchaser's
        Nominee at Closing.

               2.01.03 The execution, delivery and performance of this Agreement
        and the consummation of the transactions contemplated by this Agreement
        do not and will not (A) conflict with or violate or constitute a default
        under (with or without notice or lapse of time or both) any agreement
        governing Seller's organization or management or any agreement to which
        Seller is a party or to which any of the Subject Properties is bound;
        (B) result in or give rise to (or with notice or the passage of time of
        both could result in or give rise to) the creation or imposition of any
        lien, charge penalty, restriction, security interest or encumbrance or
        any termination, cancellation or acceleration under the terms,
        conditions or provisions of any of the Subject Properties (or any
        agreement, instrument or obligation relating to or burdening any Subject
        Property) or under any applicable law, rule or regulation; or (C)
        violate any judgment, decree, order, regulation or rule of any court or
        governmental authority applicable to Seller or the Subject Properties,
        subject to the

                                             8
<PAGE>
        expiration of any waiting periods under the Hart-Scott-Rodino Antitrust
        Improvements Act of l976 (the "HSR Act"), if applicable, and except for
        any violation which is not material or which would not affect Seller's
        ability to consummate the transactions contemplated under this
        Agreement.

               2.01.04 There are no tax liens upon, pending against, or, to the
        knowledge of Seller, threatened against any of the Subject Properties.

               2.01.05 To Seller's knowledge, there are no judicial,
        administrative or arbitration actions or proceedings pending or
        threatened that challenge the validity of this Agreement or seek to
        restrain or prevent any action taken or to be taken by Seller in
        connection with this Agreement. Except as shown on Exhibit "B-1" and
        Exhibit "F" , to Seller's knowledge there is no litigation or
        arbitration or other proceeding pending or threatened, or any order,
        injunction, remediation or decree outstanding against or relating to
        Seller or the Subject Properties that, if adversely determined, would
        have a material adverse effect upon the Subject Properties or the
        continued operation thereof.

               2.01.06 Seller has not incurred any obligation or liability,
        contingent or otherwise, for brokers' or finders' fees in respect of the
        transactions contemplated herein for which Purchaser will be liable.

               2.01.07 To the best of Seller's knowledge, as of the Effective
        Time, all federal, state and Indian (if any) lease obligations with
        respect to the federal, state or Indian oil and gas leases included in
        the Subject Properties will be current and all payments required
        thereunder will have been made. Seller is qualified to own all federal,
        state and Indian leases included in the Subject Properties and does not
        exceed any acreage limitation imposed by any applicable law, rule or
        regulation on ownership of such leases. Seller is not aware of any fact
        relating to Seller or the Subject Properties that could reasonably be
        expected to cause the Minerals Management Service or other governmental
        authorities to fail to approve the assignment of the Subject Properties
        to Purchaser.

               2.01.08 To the best of Seller's knowledge, except as set forth on
        Schedule 2.01.08: (a) the Subject Properties comply in all material
        respects with all applicable laws, rules and regulations of governmental
        authorities (provided that this representation and warranty does not
        purport to cover compliance with environmental laws, rules or
        regulations); (b) Seller has not received any notice of any violation or
        alleged violation of any law, rule or regulation

                                             9
<PAGE>
        applicable to the Subject Properties; and (c) Seller has not entered
        into any compliance or remediation plans with any governmental authority
        which in any way relate to the Subject Properties.

               2.01.09 To the best of Seller's knowledge, set forth on Schedule
        2.01.09 is a true and correct list as of the date hereof of the
        contracts, agreements, leases or similar arrangements, each of which is
        included in the Subject Properties or by which any of the Subject
        Properties will be bound after the Effective Time, and which:

                      (a) is with any Affiliate of Seller;

                      (b) is a contract for the sale, purchase, processing or
               transportation of oil, gas or other hydrocarbons produced from or
               attributable to the Oil and Gas Properties, except such contracts
               which can be terminated by Seller or its assigns upon not more
               than thirty (30) days notice; or

                      (c) evidences a lease or rental of any land, building or
               other improvements or portion thereof, excluding those associated
               with (i) Oil and Gas Properties and (ii) surface leases which are
               not material to the business of owning and operating the Subject
               Properties.

               2.01.10 To the best of Seller's knowledge, as of the Effective
        Time Seller will have paid all taxes on or relating to the Subject
        Properties, or any production or revenues attributable thereto, which
        are then currently due and payable as required by law, rule or
        regulation prior to delinquency.

               2.01.11 To the best of Seller's knowledge, all currently existing
        Wells have been drilled and completed within the limits permitted by
        contract, pooling or unit agreement, and by applicable law, rule or
        regulation; and all drilling and completion of such Wells and all
        related development and operations have been conducted in compliance
        with all applicable laws, rules and regulations. To the best of Seller's
        knowledge no such Well is subject to penalties on allowables after the
        Effective Time because of any overproduction or any other violation of
        applicable law, rule or regulation.

               2.01.12 To the best of Seller's knowledge, except as set forth in
        Schedule 2.01.12, the Subject Properties are not subject to any tax
        partnership agreement or provisions

                                             10
<PAGE>
        requiring a tax partnership income tax return to be filed.

               2.01.13 There are no bankruptcy, reorganization or arrangement
        proceedings pending against, being contemplated by, or, to the knowledge
        of Seller, threatened against Seller.

2.02    LIMITATIONS ON WARRANTIES AND OTHER DISCLAIMERS.

THERE ARE NO WARRANTIES THAT EXTEND BEYOND THE FACE OF THIS AGREEMENT. THE
EXPRESS REPRESENTATIONS AND WARRANTIES OF SELLER CONTAINED IN SECTION 2.01 ABOVE
ARE EXCLUSIVE AND ARE IN LIEU OF, AND SELLER EXPRESSLY DISCLAIMS AND NEGATES AND
PURCHASER HEREBY WAIVES, ALL OTHER REPRESENTATIONS AND WARRANTIES, EXPRESS,
IMPLIED, STATUTORY OR OTHERWISE. AS EXAMPLES AND FOR THE AVOIDANCE OF DOUBT, BUT
WITHOUT LIMITATION OF THE FOREGOING, THE SUBJECT PROPERTIES SHALL BE CONVEYED
PURSUANT HERETO WITHOUT ANY WARRANTY OR REPRESENTATION WHETHER EXPRESS, IMPLIED,
STATUTORY OR OTHERWISE, WITH RESPECT TO: (A) THE QUANTITY, QUALITY, CONDITION,
SIZE, WEIGHT, SERVICEABILITY, CONFORMITY TO SAMPLES OF MODELS OR ANY OTHER
ASPECT OF THE WELLS, WELLBORES, FIXTURES, EQUIPMENT OR OTHER PERSONAL PROPERTY
INCLUDED AMONG THE SUBJECT PROPERTIES, ALL OF WHICH SHALL BE CONVEYED TO
PURCHASER AS IS, WHERE IS, AND WITH ALL FAULTS AND DEFECTS AND IN THEIR PRESENT
CONDITION AND STATE OF REPAIR AND WITHOUT ANY WARRANTIES WHATSOEVER OF
MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE; (B) THE ACCURACY OR
COMPLETENESS OF ANY DATA, REPORTS, RECORDS, PROJECTIONS, INFORMATION OF
MATERIALS NOW, HERETOFORE OR HEREAFTER FURNISHED OR MADE AVAILABLE TO PURCHASER
IN CONNECTION WITH THIS AGREEMENT INCLUDING, WITHOUT LIMITATION, RELATIVE TO
PRICING ASSUMPTIONS, OR QUALITY OR QUANTITY OF HYDROCARBON RESERVES (IF ANY)
ATTRIBUTABLE TO THE SUBJECT PROPERTIES OR THE ABILITY OR POTENTIAL OF THE
SUBJECT PROPERTIES TO PRODUCE HYDROCARBONS; (C) THE QUALITY, QUANTITY OR VOLUME
OF THE RESERVES, IF ANY, OF OIL, GAS OR OTHER HYDROCARBONS IN OR UNDER THE
SUBJECT PROPERTIES; (D) THE PHYSICAL AND ENVIRONMENTAL CONDITION OF THE SUBJECT
PROPERTIES, BOTH SURFACE AND SUBSURFACE, INCLUDING BUT NOT LIMITED TO CONDITIONS
SPECIFICALLY RELATED TO THE PRESENCE, RELEASE OR DISPOSAL OF HAZARDOUS
SUBSTANCES, SOLID WASTES, ASBESTOS AND OTHER MAN MADE

                                       11
<PAGE>
FIBERS, OR NATURALLY OCCURRING RADIOACTIVE MATERIALS; (E) THE COMPLETENESS OR
ACCURACY OF INFORMATION CONTAINED IN THE DATA OR ANY OTHER MATERIALS FURNISHED
OR MADE AVAILABLE TO PURCHASER BY SELLER OR BY SELLER'S AGENTS OR
REPRESENTATIVES OR BY ANY OTHER PARTY, IT BEING AGREED BY PURCHASER THAT ANY AND
ALL SUCH DATA, RECORDS, REPORTS, PROJECTIONS, INFORMATION AND OTHER MATERIALS
(WRITTEN OR ORAL) FURNISHED OR OTHERWISE MADE AVAILABLE OR DISCLOSED TO
PURCHASER HAVE BEEN AND WILL BE PROVIDED TO PURCHASER AS A CONVENIENCE AND SHALL
NOT CREATE OR GIVE RISE TO ANY LIABILITY OF OR AGAINST SELLER AND ANY RELIANCE
ON OR USE OF THE SAME SHALL BE AT PURCHASER'S SOLE RISK TO THE MAXIMUM EXTENT
PERMITTED BY LAW; (F) OWNERSHIP OR OPERATION OF THE SUBJECT PROPERTIES OR ANY
PART THEREOF; AND (G) ALL OTHER REPRESENTATIONS AND WARRANTIES, EXPRESS, IMPLIED
OR STATUTORY. THE DISCLAIMERS AND WAIVERS WITH RESPECT TO REPRESENTATIONS AND
WARRANTIES AS SET FORTH IN THIS SECTION 2.02 SHALL NOT SERVE TO RELIEVE SELLER
FROM THE PERFORMANCE OF ITS EXPRESS COVENANTS IN THIS AGREEMENT OR RESTRICT
PURCHASER'S RIGHTS UNDER ARTICLE VII. PURCHASER ACKNOWLEDGES THAT THIS WAIVER IS
CONSPICUOUS.

2.03 REPRESENTATIONS AND WARRANTIES OF PURCHASER. Purchaser represents and
warrants to Seller that the following are true and correct as of the date of
this Agreement and will be true at Closing as if made on that date:

               2.03.01 Purchaser is a Delaware Corporation which together with
        its wholly owned subsidiary Kelley Oil Corporation (herein referred to
        as "Purchaser's Nominee):

                      (A) are duly organized, validly existing and in good
               standing under the laws of the state of their incorporation or
               organization;

                      (B) prior to Closing, will have taken all requisite steps
               to insure their ability to legally conduct business in the places
               and manner as required to acquire, own and operate the Subject
               Properties as of the Effective Time;

                      (C) have full corporate power and authority to carry on
               their business as now being conducted and, prior to Closing will
               be duly licensed or qualified to do

                                       12
<PAGE>
               business  and will be in good standing in each jurisdiction in 
               the states in which the Subject Properties are located as of the 
               Effective Time; and

                      (D) have full corporate power and authority and are duly
               authorized by appropriate action of each of their boards of
               directors, shareholders, partners, venturers, members or others,
               as the case may be, to enter into this Agreement and to perform
               the obligations hereunder.

               2.03.02 This Agreement has been duly and validly executed and
        delivered by Purchaser and constitutes, and all other agreements
        contemplated herein, when entered into, will constitute the valid and
        binding agreements and obligations of Purchaser enforceable against
        Purchaser in accordance with their respective terms, and no additional
        consents to the transaction are necessary.

               2.03.03 The execution, delivery and performance of this Agreement
        and the consummation of the transactions contemplated by this Agreement
        do not and will not (A) conflict with or violate or constitute a default
        under (with or without notice or lapse of time or both) any agreement
        governing Purchaser's organization or management or (B) violate any law,
        rules or regulation of any governmental authority to which Purchaser is
        subject, subject to the expiration of any waiting periods under the HSR
        Act, if applicable, and except for any violation which is not material
        or which would not affect Purchaser's ability to consummate the
        transactions contemplated under this Agreement.

               2.03.04 Purchaser has not incurred any obligation or liability,
        contingent or otherwise, for brokers' or finders' fees in respect of the
        transactions contemplated herein for which Seller will be liable.

               2.03.05 To Purchaser's knowledge, there is no suit, action,
        claim, investigation, arbitration or inquiry by any person or entity or
        by any administrative agency or governmental body (including, without
        limitation, expropriation or forfeiture proceedings), and no legal,
        administrative, or arbitration proceedings pending or threatened against
        Purchaser, or to which Purchaser is a party, that reasonably may be
        expected to have a materially adverse effect upon the ability of
        Purchaser to consummate the transactions contemplated in this Agreement.

               2.03.06 Purchaser has sufficient cash or other sources of 
        immediately available

                                       13
<PAGE>
        funds to enable it to make the Deposit payment to Seller as of the date
        hereof, and will, as of Closing, have sufficient cash or other sources
        of immediately available funds to enable it to make all other payments
        to Seller contemplated by this Agreement.

               2.03.07 Purchaser and Purchaser's Nominee experienced and
        knowledgeable investors in oil and gas properties and have the financial
        and business expertise to evaluate the merits and risks of the
        transactions contemplated by this Agreement. In entering into this
        Agreement, Purchaser has relied solely on the express representations
        and covenants of Seller in Section 2.01 of this Agreement, its
        independent investigation of, and judgment with respect to, the Subject
        Properties and the advice of its own legal, tax, economic,
        environmental, engineering, geological and geophysical advisors and not
        on any comments or statements of any representatives of, or consultants
        or advisors engaged by Seller.

               2.03.08 Purchaser is acquiring the Subject Properties for its own
        account or that of Purchaser's Nominee, and not with the intent to make
        a distribution thereof within the meaning of the Securities Act of 1933
        (and the rules and regulations pertaining thereto) or a distribution
        thereof in violation of any other applicable securities laws.

               2.03.09 Purchaser or Purchaser's Nominee will, on or before the
        Effective Time, meet, , and will continue to meet after the Effective
        Time, the individual lease bonding, area-wide bonding, supplemental
        bonding and any other bonding requirements of the Minerals Management
        Service and other governmental authorities. Purchaser and Purchaser's
        Nominee are or will prior to Closing, and, after the Effective Time,
        will continue to be, otherwise qualified by the Minerals Management
        Service and any other governmental authority to own the Subject
        Properties. Purchaser and Purchaser's Nominee shall furnish to Seller no
        later than Closing written evidence of their compliance with this
        Section. The consummation of the transactions contemplated hereby will
        not cause Purchaser or Purchaser's Nominee to be disqualified to be an
        owner of federal oil, gas, and mineral leases in the Gulf of Mexico
        region, or to exceed any acreage limitation imposed by any law, statute,
        rule or regulation. Purchaser nor Purchaser's Nominee, are aware of any
        fact that could reasonably be expected to cause the Minerals Management
        Service or other governmental authorities to fail to approve the
        assignment of the Subject Properties to Purchaser or Purchaser's
        Nominee.

                                       14
<PAGE>
                                   ARTICLE III
                       OWNERSHIP OF THE SUBJECT PROPERTIES

                        ALLOCATION OF INCOME AND EXPENSES

 Subject to the provisions hereof, Seller shall remain entitled to all of the
rights of ownership (including, without limitation, the right to all production,
proceeds of production, and other proceeds) and shall remain subject to the
duties and obligations of such ownership for the period of time prior to the
Effective Time. Subject to the provisions hereof, and subject to the occurrence
of Closing, Purchaser shall be entitled to all of the rights of ownership
(including, without limitation, the rights to all production, proceeds of
production, and other proceeds) and shall be subject to the duties and
obligations of such ownership, in each case, attributable to the Subject
Properties for the period of time from and after the Effective Time.

                                   ARTICLE IV
                            COVENANTS PENDING CLOSING

 4.01 ACCESS. Immediately following the execution of this Agreement and on a
continuing basis until the Closing Date (or earlier termination of this
Agreement ) Seller will give or, in the case of any of the Subject Properties
for which Seller is not the Operator, use its best efforts to cause Purchaser
and its attorneys and other representatives to be given access to the Subject
Properties at Purchaser's sole cost and expense and, at Seller's office, to any
records, documents or information of Seller pertaining to the ownership and/or
operation of the Subject Properties, subject to Purchaser's prior execution of
an access agreement in a form reasonably acceptable to Seller. Such access shall
be at reasonable times on prior notice. Seller shall not be obligated to provide
Purchaser with access to any records or data which Seller cannot legally provide
to Purchaser without, in its opinion, breaching, or risking a breach of,
confidentiality, license or other agreements with other parties. PURCHASER SHALL
NOT CONTACT ANY THIRD PARTY TO VISIT OR OTHERWISE VIEW OR OBTAIN ANY INFORMATION
CONCERNING THE SUBJECT PROPERTIES, WITHOUT AT LEAST THREE (3) BUSINESS DAYS
PRIOR WRITTEN NOTICE TO SELLER OF SUCH CONTACT, AND SELLER SHALL HAVE THE RIGHT
TO HAVE A REPRESENTATIVE PRESENT AT OR PARTICIPATE IN ANY AND ALL SUCH CONTACTS.
Purchaser recognizes and agrees that all materials made available to it (whether
pursuant to this Section or otherwise) in connection with the transaction
contemplated hereby are made available to it as an accommodation, and without
representation or warranty of any kind as to the accuracy and completeness of
such materials.

PURCHASER HEREBY AGREES TO DEFEND, INDEMNIFY, RELEASE, PROTECT, SAVE AND HOLD
HARMLESS SELLER FROM AND AGAINST ANY AND ALL LOSSES ARISING OUT OF OR RELATING
TO ANY CLAIMS RELATING TO ANY PLANT, FIELD OR

                                       15
<PAGE>
FACILITY VISIT, OR OTHER DUE DILIGENCE ACTIVITY, CONDUCTED BY PURCHASER OR ANY
OF ITS AGENTS, REPRESENTATIVES, AFFILIATES, SUCCESSORS, ASSIGNS, OFFICERS OR
DIRECTORS INCLUDING WITHOUT LIMITATION ANY LOSSES RESULTING, IN WHOLE OR IN
PART, FROM THE CONCURRENT OR JOINT NEGLIGENCE OR STRICT LIABILITY OF SELLER.

4.02 PREFERENTIAL RIGHTS. Seller will use reasonable efforts, consistent with
industry practices in transactions of this type, to identify, with respect to
all material Oil and Gas Properties, (A) all preferential rights to purchase,
and all rights to require that consents to assignment of any portion of the Oil
and Gas Properties be obtained, which would be applicable to the transactions
contemplated hereby and (B) the parties holding such rights; in attempting to
identify the same, Seller shall in no event be obligated to go beyond its own
records. Schedule 4.02 lists the parties holding preferential rights which would
be applicable to the transactions contemplated hereby which have been identified
by Seller as of the date hereof. Promptly upon the full and proper execution of
this Agreement, and receipt of the Deposit, Seller will request, from the
parties so identified (and in accordance with the documents creating such
rights), waivers of the preferential rights to purchase and consents to assign
which were so identified. Seller shall have no obligation hereunder, other than
to attempt to identify, with respect to such Oil and Gas Properties, such
preferential rights and requirements for consent to assignment and to so request
such waivers and consents, but with the understanding that Seller shall have no
obligation to assure that such waivers and consents are obtained. Seller shall
provide Purchaser with copies of all correspondence sent or received by Seller
in connection with such efforts contemporaneously with the receipt or sending
thereof. The requests and notices sent by Seller to the holders of preferential
rights and consent rights shall be in form reasonably satisfactory to Purchaser.
The Parties further agree with respect to such preferential rights or consents
as follows:

               4.02.01 If prior to Closing a party from whom a waiver of a
        preferential right to purchase is requested refuses to give such waiver,
        Seller will tender the required interest in the Oil and Gas Property
        affected by such unwaived preferential right to the holder, or holders
        thereof at an amount equal to the proportionate part of the amount
        specified in Exhibit D hereto for the affected Lease or Well, reduced
        proportionately, if less than the entire interest of Seller in any Lease
        or Well must be tendered. If, and to the extent that, such preferential
        right to purchase is exercised by such party or parties, and such
        interest in such Lease or Well is actually sold to such party or parties
        so exercising such right, such interest will be excluded from the
        transaction contemplated hereby and the Base Purchase Price will be
        reduced by such amount (or proportionate part thereof, as the case may
        be) so specified

                                       16
<PAGE>
        in Exhibit D hereto for the affected Lease or Well.

               4.02.02 If, on the Closing Date, (a) there remain preferential
        rights to purchase which have not been waived or for which the
        applicable time within which the holder thereof may elect to exercise
        such rights has not expired and (b) the total amount of adjustments
        which would be made to the Base Purchase Price in the event all of such
        preferential rights were exercised by the holders thereof, together with
        the net aggregate of all other adjustments permitted by this Agreement
        (for purposes of this subsection the "Total Possible Adjustments"),
        would be sufficient to permit termination (for purposes of this
        subsection the "Termination Threshold") of this Agreement under Section
        10.01 (B), then Closing shall be extended to the earlier of (i) a date
        two (2) business days following the date that sufficient waivers of
        preferential rights to purchase are received (or the time period for
        exercise thereof has expired without such rights being exercised) to
        reduce the then Total Possible Adjustments to a level below the
        Termination Threshold or (ii) the first date on which all preferential
        rights have been exercised, waived or for which the time period within
        which to exercise same has expired without action.

               4.02.03 In the event Closing occurs prior to the expiration of
        the period within which the holder of any given preferential right is
        permitted to make its election, then the Oil and Gas Property affected
        by such preferential right will be conveyed to Purchaser at Closing and,
        in the event the preferential right is exercised by such third party
        after Closing, Purchaser shall convey the affected Oil and Gas Property
        to such third person in full compliance with the terms of the agreement
        pursuant to which the preferential right exists at the amount specified
        in Exhibit D hereto (proportionately reduced, if applicable) for the
        applicable portion of the Subject Properties, and Purchaser shall be
        entitled to the consideration for the sale of such Oil and Gas Property.

               4.02.04 The failure of Seller to obtain any required consent to
        assign prior to Closing shall constitute a Title Defect under the
        provisions of Section 7.01.02.

               4.02.05 Except to the extent that Purchaser can establish that
        Seller failed to fulfill the obligations set forth above in this Section
        4.02, Purchaser shall indemnify and hold Seller harmless from and
        against all claims, actions, liabilities, damages, losses, costs or
        expenses (including court costs and attorneys fees) whatsoever that
        arises out of the failure to obtain waivers of preferential rights to
        purchase or requirements for consent to assignment with respect to any
        transfer by Seller to Purchaser of any part of the Subject Properties
        and

                                       17
<PAGE>
        with respect to any subsequent transfers.

4.03 INTERIM OPERATIONS. Seller covenants that from the date hereof to the
Closing Date, except (A) as provided herein, (B) as required by any existing
Contract or (C) otherwise consented to in writing by Purchaser, Seller will:

               4.03.01 Continue to operate the Subject Properties prudently and
        in the normal course of business and will not (A) operate or in any
        manner deal with, incur obligations with respect to, or undertake any
        transactions relating to, the Subject Properties other than transactions
        (i) in the normal, usual and customary manner, (ii) of a nature and in
        an amount consistent with prior practice, (iii) in the ordinary and
        regular course of business of owning and operating the Subject
        Properties, and (iv) subject to the terms and conditions of this
        Agreement; (B) dispose of, encumber or relinquish any of the Subject
        Properties (other than relinquishments resulting from the expiration of
        Leases that Seller has no right or option to renew); or (C) waive,
        compromise or settle any right or claim that would have a material
        adverse effect on the ownership, operation or value of any of the
        Subject Properties after the Effective Time.

               4.03.02 Promptly notify Purchaser of any suit, lessor demand
        action, or other proceeding before any court, arbitrator, or
        governmental agency and any cause of action which relates to the Subject
        Properties or which might result in impairment or loss of any portion of
        the Subject Properties or which might hinder or impede the operation of
        the Subject Properties.

               4.03.03 Make or give all notifications, filings, consents or
        approvals from, to or with all governmental authorities, and will
        cooperate with Purchaser in obtaining the issuance, assignment or
        transfer, as the case may be, by each such authority of such Permits as
        may be necessary for Purchaser to own and operate the Subject Properties
        following the consummation of the transactions contemplated in this
        Agreement; provided that Seller shall not be required to incur any
        expense in connection therewith.

               4.03.04 Maintain in effect insurance providing the same type
        coverage, in the same amounts with the same deductibles as the insurance
        maintained in effect by Seller or its Affiliates on the date of this
        Agreement.

                                       18
<PAGE>
4.04.01 SPECIAL INTERIM PERIOD OPERATIONS. For new operations (those which have
not yet commenced and are not a logical continuation to or part of an operation,
or series of operations, previously approved by Seller and commenced by the
operator on or before the date hereof, such as the completion or plugging and
abandonment of a well drilling prior to the date hereof) affecting the Subject
Properties proposed by third parties during the period between the date of this
Agreement and the Effective Time which operations are the type of operation for
which Seller has the opportunity to elect whether or not it will participate,
Seller will, within two (2) business days of receipt of the notice of the
proposal of such operation (a "Routine Proposal"), send a copy of such Proposal
to Purchaser for Purchaser's consideration unless Seller has less than two (2)
business days within which to respond to such notice (an "Emergency Proposal"),
in which case, Seller will immediately notify Purchaser. No later than ten (10)
business days prior to the time when Seller's election to the party proposing
the operation is due pursuant to a Routine Proposal or, no later than 24 hours
prior to the time such an election is due for an Emergency Proposal, Purchaser
will notify Seller of Purchaser's participation election in response to the
applicable proposal. If the Purchaser elects not to participate, Seller shall
notify the party proposing the operation of Seller's election not to
participate. If Purchaser desires to participate, then Seller and Purchaser
shall, as soon as possible and in any event two (2) business days prior to the
applicable election deadline imposed on Seller for a Routine Election, attempt
to agree on the after tax present value (using a 15% per year discount factor)
that would reasonably result from a successful operation, net of any and all
capital costs and expenses associated with such operation (the "Prospect
Value"). If the Parties are unable to timely agree on the Prospect Value, Seller
shall notify the party proposing the operation of Seller's election not to
participate. If the Parties have agreed on the Prospect Value no later than
twenty-four (24) hours prior to the deadline for delivery of a response for a
Routine Election or two (2) hours prior to the deadline for delivery of a
response for an Emergency Election, Seller shall notify the party proposing the
operation of Seller's election to participate in the proposed operation and
Purchaser shall be liable for and shall pay Seller, at least one (1) week in
advance of the date(s) such payment(s) are due from Seller to the party
conducting the operation, for the entirety of the capital costs and expenses of
such operation whether or not the transactions contemplated by this Agreement
has been or is ever finalized. In the event the operation is thereafter
performed and this Agreement is terminated by either Party for any reason
whatsoever without the transactions contemplated hereby having been finalized,
then Purchaser shall pay to Seller the agreed to Prospect Value regardless of
the actual outcome of the operation. Such payment shall be made by Purchaser
within fifteen (15) days of Seller's invoice therefor to Purchaser, and if not
timely paid, shall bear interest at the rate of 1.5% per month from the date due
until paid.

                                             19

<PAGE>
4.04.02 For operations affecting the Subject Properties proposed by Seller
and/or third parties which are a logical extension to or part of an operation,
or series of operations, previously approved by Seller in the normal and
ordinary course of business and are commenced or provide Seller the opportunity
to elect whether or not it will participate, between the date of this Agreement
and the Effective Time, (i) the Parties agree to follow the notice, response and
election time frames outlined for Routine Proposals and Emergency Proposals
outlined in Section 4.04.01 above, and (ii) Seller agrees that it shall timely
and prudently commence and perform such operations to the extent it is the
Operator or notify the party proposing and responsible for conducting such
operations, in a manner consistent with Purchaser's timely election, which shall
be made in good faith, based upon sound industry and engineering practice, and
economically justifiable from the Purchaser's perspective. Seller shall be
liable and pay for the costs and expenses arising from the activities associated
with such operations, which activities are actually conducted prior to the
Effective Time, regardless of the outcome of the proposed operation(s).
Sidetrack, deepening, redrilling and other operations substantially outside of
the scope previously approved by Seller shall be considered new operations and
covered by Section 4.04.01 above.

4.05 ANTITRUST NOTIFICATION. If required by law, Seller and Purchaser will each
file, within five (5) business days after the execution of this Agreement, with
the Federal Trade Commission and the Department of Justice the notification and
report form required for the transactions contemplated hereby and any
supplemental information that may be reasonably requested in connection
therewith pursuant to the HSR Act and the rules and regulations promulgated
thereunder, which notification and report form and supplemental information will
comply in all material respects with the requirements of the HSR Act. The
Parties will seek early termination of the waiting period of the HSR Act.

4.06 NOTICE OF BREACH OF REPRESENTATIONS OR WARRANTIES. Purchaser and Seller
will immediately notify the other upon the discovery that any representation or
warranty of either Party is, becomes or will be untrue on the Closing Date.

4.07 CHANGE OF OPERATOR. If and to the extent Purchaser or Purchaser's Nominee
becomes the Operator of any of the Subject Properties pursuant to the terms of
all applicable operating agreements or other agreements that control the
appointment of a successor operator, then at the Effective Time, Purchaser or
Purchaser's Nominee shall assume all responsibilities and obligations of being
"Operator" of all of the Subject Properties for which Seller is then Operator.
Within two (2) business days of Closing, subject to receiving from Seller all
documentation or required assistance, the delivery or performance of which is
within the sole control of Seller, Purchaser or

                                       20
<PAGE>
Purchaser's Nominee shall have taken all actions necessary to be substituted as
Operator on the records of all governmental agencies or authorities as
appropriate. Seller will assist Purchaser in obtaining the approval of the
working interest owners in each applicable Well or unit to the substitution of
Purchaser or Purchaser's Nominee as Operator in place of Seller. Purchaser
acknowledges and agrees that Seller cannot and does not covenant or warrant that
Purchaser or Purchaser's Nominee shall become successor Operator to Seller since
such Wells or units may be subject to operating or other agreements that control
the appointment of a successor operator.

4.08 SALES OF PRODUCTION. If Closing occurs after the 10th day of the calendar
month preceding the calendar month in which the Effective Time occurs, Purchaser
shall have the right to elect to have Seller, or a designee of Seller, contract
for the sale of all production from the Subject Properties to be produced during
the calendar month in which the Effective Time occurs. If Purchaser elects to
have Seller contract for such sales, it must notify Seller in writing of such
election no later than the 15th day of the calendar month preceding the calendar
month in which Effective Time occurs (or the next business day if the 15th is a
legal holiday). In such event, Purchaser agrees to cooperate with Seller and
operate the daily production of the Subject Properties in conjunction and
accordance with the mutually agreeable nominations made by Seller for such
production for the applicable sales month. Seller will pay (or cause to be paid)
Purchaser 98% of the amount actually received by Seller (or its designee) for
the sale of such production, less any and all costs actually incurred by Seller
(or its designee) of gathering, transportation and/or transportation penalties
not caused directly by the intentional misconduct or gross negligence of Seller
or its designee, compression, treating and/or processing of such production and
less all costs or in-kind volumes of any fuel and shrinkage associated with such
services or operations. Purchaser shall be paid on or before the last day of the
month following the month in which such sales are made, or five (5) business
days after the receipt by Seller (or its designee) of the proceeds from the sale
of Purchaser's production from the Subject Properties, whichever is later.
Except for payment to Purchaser of the proceeds from the sale of such
production, Seller nor its designee shall have any liability to Purchaser
arising from any aspect of the sale thereof, unless arising from the intentional
misconduct or gross negligence of Seller or its designee; it being understood
that all of such sales are being made strictly as an accommodation to Purchaser.
Purchaser acknowledges that after such month of production sales by Seller or
its designee, that Purchaser will assume all obligations and take the actions
necessary to thereafter sell the production from the Subject Properties.

                                    ARTICLE V
                              CONDITIONS TO CLOSING

                                       21
<PAGE>
5.01 CONDITIONS TO OBLIGATIONS OF SELLER. The obligations of Seller under this
Agreement are subject to the satisfaction at or prior to Closing, of the
following conditions:

               5.01.01 All representations and warranties of Purchaser contained
        in this Agreement shall be true in all material respects at and as of
        Closing as if such representations and warranties were made at and as of
        Closing.

               5.01.02 If filing thereof is required by law, the necessary
        waiting period with respect to filings under the HSR Act shall have
        expired, or the Department of Justice and the Federal Trade Commission
        shall have otherwise consented to the consummation of the transactions
        contemplated by this Agreement so that Closing may proceed without
        violation thereof; provided, if the waiting period has not expired or
        consent otherwise received on or before December 1, 1997, then the
        Closing shall be delayed until the third business day following the
        expiration of the waiting period or receipt of consent.

               5.01.03 Purchaser will have performed and complied with, or
        caused the performance of and compliance with, in all material respects,
        all the obligations, terms, conditions, and agreements required by this
        Agreement to be performed or complied with by it on or prior to Closing.

               5.01.04 Purchaser shall make payment of the Base Purchase Price
        as adjusted at Closing.

               5.01.05 As of Closing, no suit, action or other proceeding shall
        be pending or threatened before any court or governmental agency seeking
        to restrain Seller or prohibit the Closing or seeking damages against
        Seller as a result of the consummation of this Agreement.

               5.01.06 Purchaser and Purchaser's Nominee shall have delivered to
        Seller certified copies of the resolutions of their respective Boards of
        Directors authorizing the consummation of the transactions contemplated
        in this Agreement by Purchaser.

               5.01.07 Purchaser shall have delivered to Seller a certificate
        dated and effective as of the Closing Date and executed by a duly
        authorized representative of Purchaser, certifying to Seller that all of
        Purchaser's representations and warranties are true and correct in all
        material respects as of the Closing and that Purchaser has performed all
        of its obligations

                                       22
<PAGE>
        under this Agreement in all material respects.

5.02 CONDITIONS TO OBLIGATIONS OF PURCHASER. The obligations of Purchaser under
this Agreement are subject to the satisfaction at or prior to Closing, of the
following conditions:

               5.02.01 If filing thereof is required by law, the necessary
        waiting period with respect to filings under the HSR Act shall have
        expired, or the Department of Justice and the Federal Trade Commission
        shall have otherwise consented to the consummation of the transactions
        contemplated by this Agreement so that Closing may proceed without
        violation thereof; provided, if the waiting period has not expired or
        consent otherwise received on or before December 1, 1997, then Closing
        shall be delayed until the third business day following the expiration
        of the waiting period or receipt of consent.

               5.02.02 Seller will have performed and complied with, or caused
        the performance and compliance with, in all material respects, all the
        obligations, terms, conditions, and agreements required by this
        Agreement to be performed or complied with by Seller on or prior to
        Closing, and Seller shall have delivered to Purchaser or Purchaser's
        Nominee at Closing the Assignments and all of the other documents and
        instruments to be delivered by Seller pursuant hereto.

               5.02.03 As of the Closing, no suit, action or other proceeding
        shall be pending or threatened before any court or governmental agency
        seeking to restrain Purchaser or prohibit the Closing or seeking damages
        against Purchaser as a result of the consummation of this Agreement.

               5.02.04 Seller shall have delivered to Purchaser a certified copy
        of the resolutions of Seller's Board of Directors authorizing the
        consummation of the transactions contemplated in this Agreement by
        Seller.

                                   ARTICLE VI
                        CLOSING AND DELIVERIES AT CLOSING

6.01 DELIVERY OF CONVEYANCE. Seller shall execute, acknowledge and deliver to
Purchaser at Closing all Assignments, completely and validly executed, in the
proper form, conveying the Subject

                                       23
<PAGE>
Properties to Purchaser or Purchaser's Nominee as of the Effective Time.

6.02 LETTERS IN LIEU. Seller shall execute and deliver to Purchaser at Closing
letters in lieu of transfer orders (or similar documentation), in a form
acceptable to both Parties.

6.03 PAYMENT TO SELLER. Purchaser shall deliver to Seller, by wire transfer of
immediately available funds by 1:00 p.m. Central Standard Time on the Closing
Date to the account specified in Section 12.08(B) herein, an amount equal to the
Adjusted Purchase Price less the Deposit.

6.04 SUCCESSION BY PURCHASER. At Closing Purchaser and Purchaser's Nominee shall
(a) furnish to Seller such evidence (including, without limitation, evidence of
satisfaction of all applicable bonding requirements) as Seller may reasonably
require that Purchaser and Purchaser's Nominee are qualified with the applicable
governmental authorities to succeed Seller as the owner and, where applicable,
the Operator of the Subject Properties; (b) with respect to properties operated
by Seller where Purchaser or Purchaser's Nominee are to succeed Seller as
Operator, execute and deliver to Seller the applicable forms prepared by Seller
for further handling by Purchaser or Purchaser's Nominee, as appropriate
evidence reflecting change of operator as required by all applicable
governmental authorities; and (c) execute and deliver to Seller such forms as
Seller may reasonably request for filing with the applicable authorities to
reflect the assumption of plugging and abandonment liabilities with respect to
the Wells located on the Subject Properties or on units in which the Subject
Properties participate by Purchaser or Purchaser's Nominee.

6.05 NON-FOREIGN STATUS AFFIDAVIT. If Purchaser so requests in writing prior to
Closing, Seller will execute and deliver to Purchaser an affidavit or other
certification (as permitted by such code) that Seller is not a "foreign person"
within the meaning of Section 1445 (or similar provisions) of the Internal
Revenue Code of 1986 as amended (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).

6.06 CERTIFICATES OF RESOLUTIONS.Seller shall deliver the certified resolutions
as required by Section 5.02.04 hereof.

6.07 CERTIFICATES OF RESOLUTIONS.Purchaser and Purchaser's Nominee shall deliver
the certified resolutions as required by Section 5.01.06 hereof.

6.08 CERTIFICATES OF COMPLIANCE. Purchaser and Purchaser's Nominee shall deliver
the

                                       24
<PAGE>
certificates as required by Section 5.01.07 hereof.

                                   ARTICLE VII
                      TITLE DEFECTS, ENVIRONMENTAL DEFECTS

                                  CASUALTY LOSS

7.01 DEFENSIBLE TITLE .

               7.01.01 For purposes hereof, "Defensible Title" means with
        respect to the Oil and Gas Properties such title as (A) will, on the
        Effective Time, entitle the owner of a particular Oil and Gas Property
        to receive payment for production from such Oil and Gas Property in an
        amount not less than the "Net Revenue Interest" ("NRI") for such Oil and
        Gas Property as set forth on Exhibit A-1 (except for any reduction,
        suspension or termination (i) caused by Purchaser, (ii) that arises as a
        result of Permitted Encumbrances or (iii) is set forth in the Exhibit
        A-1); (B) will, on the Effective Time, obligate the owner of a
        particular Oil and Gas Property, to bear no greater "Working
        Interest"("WI") share of costs and expenses attributable to the
        maintenance, development and operation of such Oil and Gas Property than
        the WI for each of the Wells identified on Exhibit A-1 without a
        proportionate increase in the NRI (except for any increase (i) caused by
        Purchaser, (ii) that arises as result of Permitted Encumbrances or (iii)
        is set forth in the Exhibit A-1); and (C) is free and clear of all
        liens, security interests, pledges, collateral assignments, charges,
        encumbrances or encroachments except for Permitted Encumbrances.

               7.01.02 For purposes hereof a "Title Defect" shall be any defect
        or deficiency in title, lien, encumbrance, security interest, claim or
        burden, other than Permitted Encumbrances, which causes Purchaser to
        receive less than Defensible Title in the Subject Properties including,
        without limitation, the failure of Seller to obtain at or before Closing
        the necessary consents to assign interests in the Leases. Purchaser
        shall be entitled to a reduction in the Base Purchase Price due to the
        existence of uncured Title Defects, only in accordance with the
        provisions of this Article VII. Unless Purchaser provides affirmative
        evidence that any such matters results in a third party or parties'
        superior claim of title to the relevant Subject Property, such customary
        liens, charges, encumbrances, defects and irregularities that may exist,
        including, but not limited to, defects in the early chain of title such
        as failure to recite marital status in document, omission of succession
        or heirship proceedings, lack of survey, defects that have been cured by
        possession and failure to record

                                       25
<PAGE>
        releases of liens, production payments, leases or mortgages that have
        expired by their terms, to the extent such matters are not reasonably
        expected to result in claims that will materially and adversely affect
        Purchaser's title to the Subject Properties, shall not constitute
        "Defects" or "Title Defects" hereunder.

               7.01.03 For purposes hereof "Permitted Encumbrances" shall mean
        (A) the terms, conditions, restrictions, exceptions, reservations,
        limitations and other matters contained in the agreements, instruments
        and other documents which create or reserve to Seller its interest in
        the Subject Properties, provided that the same do not (i) reduce the NRI
        in a Well below that set forth in Exhibit A-1 for such Well or (ii)
        increase the WI in a Well above that set forth in Exhibit A-1 for such
        Well without a proportionate increase in the NRI for such Well; (B)
        changes in the WI or NRI associated with the Subject Properties or any
        of them, occurring after the Effective Time from any cause; (C)
        statutory and conventional liens securing payments to operators,
        mechanics and materialmen or others, payments of taxes or other claims
        or payment obligations that are, in each case, not yet delinquent or, if
        delinquent, are being contested in good faith in the normal course of
        business and which, if contested, have been disclosed to Purchaser; (D)
        any obligations or duties to any municipality or public authority with
        respect to any franchise, grant, certificate, license or permit, and all
        applicable law; (E) Defects that Purchaser fails to assert in accordance
        with the provisions of this Article VII prior to the Notice Date (as
        hereinafter defined); (F) consents to assignment by a third party or
        governmental authority that are obtained by the Closing Date or that are
        customarily obtained after the consummation of transactions of the
        nature contemplated in this Agreement; (G) any easements, rights-of-way,
        servitudes, permits and other rights in respect of surface operations,
        pipelines or the like, and easements for pipelines, power lines and
        other similar rights-of-way, and encroachments, on, over or in respect
        of any of the Leases that do not unreasonably or materially interfere
        with the operation of the Leases for the exploration and production of
        hydrocarbons or related operations; (H) all royalties, overriding
        royalties, net profits interests, production payments, carried
        interests, reversionary interests, calls on production and other burdens
        on or deductions from the proceeds of production that do not operate to
        (i) reduce the NRI in a Well below that set forth in Exhibit A-1 for
        such Well or (ii) increase the WI in a Well above that set forth in
        Exhibit A-1 for such Well without a proportionate increase in the NRI
        for such Well; (I) the terms and conditions of all production sales
        contracts, transportation agreements, pooling agreements, unitization
        agreements, operating agreements, processing agreements, and all other
        contracts, agreements and instruments related to or utilized in
        connection with the Leases, or the production, storage, treatment,
        transportation, sale or

                                       26
<PAGE>
        disposal of oil, gas or other hydrocarbons, minerals or substances
        therefrom that do not operate to (i) reduce the NRI in a Well below that
        set forth in Exhibit A-1 for such Well or (ii) increase the WI in a Well
        above that set forth in Exhibit A-1 for such Well without a
        proportionate increase in the NRI for such Well; (J) conventional rights
        of reassignment prior to abandonment; (K) any preferential purchase
        rights in favor of third parties and any required third party consents
        to assignment and similar agreements and obligations with respect to
        which prior to Closing (i) waivers or consents have been obtained from
        the appropriate person, (ii) the applicable period of time for asserting
        such rights has expired without any exercise of such rights or (iii)
        arrangements have been made by the Parties to allow Purchaser to receive
        substantially the same economic benefits as if all such waivers and
        consents had been obtained; and (L) any other liens, charges,
        encumbrances, contracts, agreements, instruments, obligations, defects
        or irregularities of any kind whatsoever affecting the Subject
        Properties that individually or in the aggregate are not such as would
        materially adversely affect the ownership, operation, value or use of
        the Subject Properties.

               7.01.04 For purposes hereof an "Environmental Defect" means any
        event or condition with respect to air, land, soil, surface, subsurface
        strata, surface water, ground water, or sediment which causes a property
        to become subject to remediation under, or not be in compliance with,
        any applicable federal, state, and local laws, including statutes,
        regulations, orders, ordinances, and common law, relating to the
        protection of the public health, welfare and the environment, including,
        without limitation, those laws relating to the storage, handling, and
        use of chemicals and other hazardous materials, those relating to the
        generation, processing, treatment, storage, transportation, disposal, or
        other management of waste materials of any kind, and those relating to
        the protection of environmentally sensitive areas.

               7.01.05 For purposes hereof a "Contract Defect" shall exist if
        any representation or warranty made by Seller in Section 2.01 is untrue
        in any material respect or Seller fails to perform any obligation or
        covenant of Seller under this Agreement.

               7.01.06 For purposes hereof a "Reporting Defect" shall exist if
        any information previously furnished by Seller to Purchaser, and which
        information was used by Purchaser in determining the Base Purchase
        Price, with respect to (i) Lease operating expenses, (ii) amounts
        actually received by Seller and its Affiliates attributable to sales of
        production from any particular Well, and (iii) Lease plugging and
        abandonment costs are not based upon reasonable historical information
        of Seller (covering the same time periods as was covered

                                       27
<PAGE>
        by such information) and its Affiliates or based on reasonable 
        information available in the oil and gas industry.

7.02 NOTICE OF DEFECTS. Purchaser shall, as soon as possible, but for Contract
Defects in no event later than ten (10) business days prior to the Closing Date,
and for Title Defects, Environmental Defects and Reporting Defects, in no event
later than December 30, 1997 (the "Notice Date"), give written notice to Seller
specifying all Title Defects, Environmental Defects, Contract Defects and
Reporting Defects ( a "Defect"), for which Purchaser requests a reduction in the
Base Purchase Price (a "Defect Notice"), which Defect Notice shall describe the
alleged Defect with reasonable particularity on a Well by Well or Lease by Lease
basis, if applicable, and include all information in the possession of Purchaser
related to such alleged Defect. Such Defect Notice shall also state the alleged
Defect Amount (as defined in the following sentence) and shall include
specifically, without limitation, a detailed description of the nature of the
alleged Defect and specific documentation which supports the allegation of the
existence of such Defect. For purposes hereof "Defect Amount" shall mean (a) for
a Title Defect, the portion of the Base Purchase Price allocated to the interest
affected by such Defect (as shown on Exhibit D); that is, the amount by which
the Base Purchase Price so allocated to the Oil and Gas Property subject to a
Title Defect must be proportionately reduced to give appropriate remedy to
Purchaser on account of the Title Defect; (b) for an Environmental Defect, an
estimate of the cost to cure such Environmental Defect, but which cost to cure
may never exceed the value of the Oil and Gas Property as reflected on Exhibit
D; (c) for a Contract Defect the amount of the reduction in value of the Subject
Properties, or the portion thereof, as applicable, which is directly caused by
such Contract Defect; provided, that if such Contract Defect affects only a
specified Oil and Gas Property or Properties, the Defect Amount shall never
exceed the value thereof shown on Exhibit D; or (d) for a Reporting Defect, the
amount of the calculated reduction in value to any Oil and Gas Property which is
directly caused by such Reporting Defect, but which may never exceed the value
of such Oil and Gas Property reflected on Exhibit D. Failure by Purchaser to
timely assert a Defect shall be deemed an election by Purchaser to waive such
Defect and to accept and pay for the Subject Properties notwithstanding the
effect of the uncured Defect.

7.03 SELLER'S ELECTION TO CURE. Seller shall have the right to elect, at any
time prior to or after Closing within the 120 day cure period specified below at
Seller's cost, risk and expense, to attempt to cure any asserted Defect to the
reasonable satisfaction of Purchaser. In the event that such Defect is not cured
within the 120 day cure period specified below, then Seller, at its sole option,
shall be entitled to: (a) reduce the Base Purchase Price by the Defect Amount
(or if Closing has already occurred and such Defect Amount was not deducted from
the Base Purchase Price actually paid by

                                       28
<PAGE>
Purchaser, refund such Defect Amount to Purchaser) and either (i) retain the
portion of the Subject Properties affected by the Defect, or (ii) convey the
entirety of the affected portion of the Subject Properties to Purchaser; (b)
agree to indemnify Purchaser from and against any and all loss, cost, expense,
claim or cause of action existing or arising from such Defect and, in such
event, the affected portion of the Subject Properties will be conveyed to
Purchaser, the portion of the Base Purchase Price allocated thereto paid to (or
if Closing has already occurred, retained by) Seller, and such Defect will be
considered for all purposes hereunder as having been cured to Purchaser's
satisfaction; or (c) submit for arbitration any remaining dispute as to such
Defect. If Seller disputes whether an asserted Defect is actually a Defect or if
Seller elects to cure any Defect but has not cured such Defect prior to Closing,
then the portion of the Subject Properties affected by such Defect shall be
deleted from the applicable Exhibit(s) hereto and the sale contemplated herein,
and retained by Seller. The portion of the Base Purchase Price attributable to
such portion(s) of the Subject Properties affected by such Defect(s) shall
nevertheless be paid by Purchaser at Closing to NationsBank Texas N.A. as escrow
agent pursuant to a mutually acceptable escrow agreement. Seller shall have 120
days following the later of Closing, the Notice Date, or, if there is any
dispute concerning the existence of any Defect or its value or effect, the final
resolution of such dispute, within which to cure such Defect. If a Defect is
cured by Seller during said 120 day period, Seller shall convey the portion of
the Subject Properties affected by such Defect to Purchaser and as applicable,
either (i) retain the applicable Defect Amount, or (ii) the funds in escrow,
together with interest earned thereon, attributable to the portion of the
Subject Properties as to which such Defect has been cured, shall be immediately
released to Seller. If, at the end of the 120 day period there remains uncured a
Defect, (i) Seller shall pay Purchaser the applicable Defect Amount to the
extent it was not deducted from the Base Purchase Price at Closing and paid into
escrow, or (ii) the funds in escrow, together with interest earned thereon,
attributable to the Oil and Gas Properties or portions thereof affected thereby
shall be returned to Purchaser, and in either event such Oil and Gas Properties
or portions thereof shall be retained by Seller. Costs of the escrow shall be
borne one-half by each Party.

 7.04 CONSULTATION AND COOPERATION. Upon timely delivery of a Defect Notice by
Purchaser, Purchaser and Seller shall consult and use their best efforts to
agree on the validity of the alleged Defect and the respective Defect Amount
attributable to each such Defect. If the Parties cannot agree on (A) whether a
problem is a Defect, (B) the Defect Amount, or (C) whether Seller has cured any
Defect, the matter shall be referred to arbitration pursuant to the provisions
of Article XI hereof.

7.05 CASUALTY LOSS. Notwithstanding anything that may be contained herein to the
contrary, to the extent a Casualty Loss occurs prior to Closing, Seller may
elect (i) to delete the property that is

                                       29
<PAGE>
subject to the Casualty Loss from the Subject Properties, and the Base Purchase
Price shall be reduced by the value allocated to the deleted interest based on
the value reflected on Exhibit D, or (ii) to proceed with the sale of the
Subject Properties, including that subject to the Casualty Loss, notwithstanding
any such destruction or taking, in which case at Closing, Seller shall pay to
Purchaser all sums paid to Seller by third parties by reason of the destruction
or taking of that portion of the Subject Properties that is subject to Casualty
Loss and make a downward adjustment to the Base Purchase Price equal to the
difference (if any) between the third party amounts paid to Seller and then paid
by Seller to Purchaser as above provided, and the total amount of the damage
caused by such Casualty Loss (never to exceed the allocated value of the
affected property as set forth on Exhibit D hereto). Seller shall retain any and
all claims, causes of action, unpaid proceeds or other payments from third
parties arising out of such destruction or taking. For the purposes hereof the
term "Casualty Loss" means the destruction of all or any portion of the Subject
Properties by fire or other casualty or taking thereof by condemnation or under
the right of eminent domain.

7.06 INCREASES IN SELLER'S INTERESTS. Should Seller or Purchaser discover that
Seller's interest in any of the Subject Properties is greater than that shown on
Exhibit A-1 (because either the NRI in a property is greater than that shown or
the WI is less without a corresponding decrease in the NRI) then Seller shall be
entitled to a dollar for dollar offset of the amount thereof against the amount
of any downward adjustment in the Base Purchase Price otherwise due to Purchaser
under any provision of this Agreement.

7.07 LIMITATIONS ON ADJUSTMENTS. Notwithstanding any provision hereof to the
contrary, if the Purchase Price adjustment which would result under this Article
VII or under Section 12.16 for any individual Adjustment or Defect (regardless
of the Notice Date for such Defect) does not exceed Twenty-five thousand Dollars
($25,000), then the Base Purchase Price shall not be adjusted for such
Adjustment or Defect (even as to adjustments otherwise due under Section
7.03(a)) and such individual Adjustment or Defect Amount shall be considered to
have zero ($0.00) value in calculating the required threshold of net aggregate
amounts as provided in the following sentence. If the net aggregate of all
Adjustment and Defect adjustments (which adjustments individually exceed
$25,000) in the Base Purchase Price which would result under this Article VII
and Section 12.16 (i) does not exceed five percent (5%) of the Base Purchase
Price, then the Base Purchase Price shall not be adjusted. If such net aggregate
does exceed five percent (5%) of the Base Purchase Price, then the Base Purchase
Price shall be adjusted only by the amount by which the net aggregate of all
Adjustment and Defect adjustments exceeds five percent (5%) of the Base Purchase
Price; subject in all cases to the offset rights of Seller pursuant to Section
7.06.

                                       30
<PAGE>
7.08 EXPLORATION AGREEMENTS. Purchaser acknowledges that a substantial portion
of the Subject Properties and the value thereof consists of rights and interests
owned by Seller under certain exploration and development agreements that will
be assigned to Purchaser on the Effective Time. Those agreements are listed on
Exhibit G attached hereto and shall be referred to herein as the "Exploration
Agreements". Purchaser further acknowledges and agrees that Seller makes no
representation or warranty whatsoever as to the rights of Seller, or Purchaser,
under or pursuant to the Exploration Agreements, all of which have been made
available to and reviewed to the satisfaction of Purchaser prior to the
execution hereof. Without limiting the generality of the statements in this
Section or the limitations on representations and warranties elsewhere in this
Agreement, to avoid any doubt whatsoever, Seller disclaims and Purchaser waives
any representation or warranty, express or implied, as to the Exploration
Agreements or as to that portion of the Subject Properties (or their value)
which exists pursuant to the Exploration Agreements, or any of them. Purchaser
acknowledges that it may not rely on any written or oral statement of any person
concerning the status, condition, title or ownership of properties arising from
or existing pursuant to the Exploration Agreements and Purchaser shall have no
right to assert any Defect under this Article VII or otherwise under this
Agreement or to receive any reduction in the Base Purchase Price or make any
claim against Seller whatsoever, whether prior to or after Closing, which is
attributable to any property, lease, well, right, interest, contract, covenant,
condition, obligation, liability or claim existing or arising under or from any
of the Exploration Agreements.

                                  ARTICLE VIII
                  ASSUMPTION OF LIABILITIES AND INDEMNIFICATION

8.01 ASSUMPTION OF SELLER'S OBLIGATIONS BY PURCHASER. At Closing, Purchaser
shall assume all obligations and liabilities of Seller attributable to, relating
to or arising in connection in any way with the Subject Properties, including,
without limitation, the following: (A) the obligation to (i) plug and abandon or
remove and dispose of all wells, platforms, structures, flow lines, pipelines,
and the other equipment now or hereafter located on the Leases, (ii) cap and
bury all flow lines and other pipelines now or hereafter located on the Leases,
and (iii) dispose of naturally occurring radioactive material and all other
pollutants, wastes, contaminants, or hazardous, extremely hazardous, or toxic
materials, substances, chemicals or wastes now or hereafter located on the
Leases; (B) all obligations and liabilities arising from or in connection with
any gas production, pipeline, storage, processing or other imbalance
attributable to oil, gas or other hydrocarbons produced from the Leases both
before and after the Effective Time; (C) all of Seller's obligations under all
permits or contracts affecting the Subject Properties; (D) all obligations
arising under any law, rule or regulation which provides with respect to
protection of the environment or the handling, use, disposal or transportation

                                       31
<PAGE>
of hazardous materials applicable to the Subject Properties for all time periods
prior to, on or after the Effective Time; (E) all liability, cost and expense
arising from or pursuant to the claims or lawsuits described on Exhibit F; and
(F) all other costs, obligations and liabilities that arise with respect to or
otherwise relate to the Subject Properties for periods after the Effective Time
(collectively the "Assumed Obligations"). All such plugging, replugging,
abandonment, removal, disposal, and restoration operations shall be in
compliance with applicable laws and regulations and contracts, and shall be
conducted in a good and workmanlike manner.

8.02 INDEMNIFICATION. If Closing occurs, Purchaser shall assume all liability
for and indemnify Seller, its directors, officers, employees and
representatives, against all losses, costs, expenses, claims and causes of
action ("Claims") (i) arising from Purchaser's breach of any of its
representations or warranties, (ii) arising under the Assumed Obligations, (iii)
arising from Seller's obligation of indemnification to third parties pursuant to
agreements between Seller and such third parties arising in connection with the
prior acquisition of a portion of the Subject Properties by Seller, and (iv) for
which Seller remains responsible under this Agreement but for which a notice of
the existence thereof is not delivered to Seller within the time provided for in
Section 9.03, for which the claim amount exceeds the limitation on liability
amount stated in Section 9.04 or which may otherwise not be imposed on Seller
pursuant to the provisions of Article IX. Seller shall indemnify Purchaser, its
directors, officers, employees and representatives, subject in all cases to the
limitations provided for in Article IX, against all Claims arising from the
obligations or liabilities retained by Seller pursuant to this Agreement.

8.03 NORM. It is expressly recognized that the land or water bottoms covered by
the Leases listed in Exhibit A with surface facilities and production equipment
located thereon, having been used in connection with oil and gas production
activities, may contain naturally occurring radioactive materials ("NORM") as a
result of these operations. Accordingly, the lands, water bottoms, surface
facilities, and production equipment transferred herein are transferred with the
restriction that they will be used only in connection with oil and gas producing
activities associated with these Leases, and will not be subsequently
transferred for unrestricted use unless and until the concentrations of NORM
associated therewith are below the levels specified as allowable for
unrestricted transfer as set forth in any regulations, and subsequent amendments
thereto. Additionally, if Closing occurs, Purchaser agrees to comply with all
laws and regulations applicable to said lands, water bottoms, surface
facilities, and production equipment relating to NORM and to indemnify and hold
harmless Seller from and against any and all liability, cost or expense arising
from the existence or remediation of NORM.

                                       32
<PAGE>
8.04    INDEMNIFICATION PROCEDURES.

               8.04.01 Within twenty-one (21) days after any Party (the
        "Indemnified Party") becomes aware of facts giving rise to a Claim by it
        for indemnification pursuant to this Article VIII, and prior to the
        expenditure or approval of the expenditure of any funds, such
        Indemnified Party will provide notice thereof in writing by certified
        mail (a "Claim Notice") to the Party owing such indemnification (the
        "Indemnifying Party") specifying the nature and specific basis for such
        Claim and a copy of all papers served with respect to such Claim (if
        any). For purposes of this Section, receipt by the Indemnified Party of
        written notice of any demand, assertion, claim, action or proceeding
        (judicial, administrative or otherwise) by or from any person or entity
        other than a Party to this Agreement or any Affiliate thereof which
        gives rise to a Claim on behalf of such Party shall constitute the
        discovery of facts giving rise to a Claim by it and shall require prompt
        notice of the receipt of such matter as provided in the first sentence
        of this Section. Each Claim Notice shall set forth a reasonable
        description of the Claim as the Indemnified Party shall then have and
        shall contain a statement to the effect that the Indemnified Party is
        making a Claim pursuant to and formal demand for indemnification under,
        this Article VIII. The Claim Notice must set forth the particular
        provision in this Article VIII and any related provision in this
        Agreement pursuant to which such indemnification Claim is made.

               8.04.02 The indemnifications provided by this Agreement are
        expressly subject to the following:

                      (A) In case any legal proceeding or claim, including any
               investigatory proceeding, is brought or made against the
               Indemnified Party in a manner for which indemnification may be
               provided under Section 8.02, the Indemnified Party shall notify
               the Indemnifying Party with the delivery of the Claim Notice. The
               Indemnifying Party shall have the right, at its sole cost and
               expense, to control and assume the defense of any such legal
               proceeding or claim, including the employment of counsel
               satisfactory to the Indemnifying Party. If the Indemnifying Party
               controls and assumes the defense of any proceeding or claim, the
               Indemnified Party shall have the right to employ separate
               counsel, but the fees and expenses of such counsel shall be at
               the expense of the Indemnified Party unless the representation of
               both Parties by the same counsel would be inappropriate due to
               any actual or potential conflicts of interest. The Indemnifying
               Party shall not be liable for the fees and expenses of more than
               one separate firm of attorneys at any one time for the
               Indemnified Party

                                       33
<PAGE>
               in connection with any one legal proceeding or claim or
               substantially similar related proceedings and claims.

                      (B) Notwithstanding anything to the contrary in Section
               8.04.02(A) above, the Indemnified Party shall be entitled to
               reasonable compensation of costs of defense, including reasonable
               attorneys fees, in the event that (i) the employment of separate
               counsel has been authorized by the Indemnifying Party, (ii) the
               Indemnifying Party has failed to defend diligently any Claims, or
               (iii) the parties to such action (including any impleaded
               parties) include the Indemnified Party and the Indemnifying
               Party, and the Indemnified Party has been advised by legal
               counsel that there may be legal defenses available to it which
               are different from, in addition to or inconsistent with, the
               legal defenses available to the Indemnifying Party, or that the
               Indemnified Party's interest may be adverse in whole or in part
               to the interest of the Indemnifying Party. The Indemnifying Party
               shall not, in the defense of any such Claims, except with the
               prior written consent of the Indemnified Party, consent to the
               entry of any judgment or enter into any settlement which does not
               include as an unconditional term, the release by the claimant or
               the plaintiff of the Indemnified Party from all further liability
               in respect to any such Claims.

                      (C) If the Claim is of a sort which requires action on the
               part of the owners of the Subject Properties, such as restoration
               of surface locations, for example, the Indemnified Party shall
               provide the Indemnifying Party with the appropriate Claim Notice.
               The Indemnifying Party shall have the option to respond in such
               manner as it deems prudent to such Claim and shall make all
               decisions and take all action in response to the Claim. Only if
               the Indemnifying Party fails to timely and reasonably respond to
               such Claim may the Indemnified Party take such actions as are
               necessary to respond to the Claim.

               8.04.03 The indemnification obligations under this Article VIII
        (or otherwise under this Agreement) shall not apply to any settlements
        effected without the consent of the Indemnifying Party. The
        indemnification obligations under this Article VIII (or otherwise under
        this Agreement) shall not be deemed to create any rights of subrogation
        or other rights in any insurer or third party.

                                   ARTICLE IX
                            LIMITATIONS OF LIABILITY

                                       34
<PAGE>
9.01 EXCLUSIVE REMEDY. If Closing occurs, the sole and exclusive remedy of
Purchaser and Seller with respect to the purchase and sale of the Subject
Properties shall be pursuant to the express provisions of this Agreement.
Purchaser and Seller shall be deemed to have waived, to the fullest extent
permitted under applicable law, any rights of contribution and any and all
rights, claims and causes of action which may exist against Seller or Purchaser,
respectively, arising under or based on any federal, state or local statute,
law, ordinance, rule or regulation or common law or otherwise.

9.02 WAIVER OF RIGHT TO RESCIND. Seller and Purchaser acknowledge that if this
Agreement is not terminated and Closing occurs, the payment of money, as limited
by the terms of this Agreement, shall be adequate compensation for breach of any
representation, warranty, covenant or agreement contained herein or for any
other claim arising in connection with or with respect to the transactions
contemplated in this Agreement. As the payment of money shall be adequate
compensation, Purchaser and Seller waive any right to rescind the transactions
contemplated by this Agreement.

9.03 TIME LIMITATION. Notwithstanding any provision hereof to the contrary, it
is understood and agreed that any and all liabilities of Seller under this
Agreement for which Purchaser has not previously delivered to Seller a Claim
Notice pursuant to Section 8.04.01, if any, shall expire and terminate and no
longer be enforceable for all periods on and after one (1) year from the Closing
(the "Anniversary Date"). On and after the Anniversary Date, except for matters
for which Purchaser has delivered a Claim Notice to Seller prior to the
Anniversary Date, Purchaser shall not be entitled to make any claim against
Seller for any cause attributable to any time period under this Agreement or
otherwise, including, without limitation, rights of contribution arising under
or based on any federal, state or local statute, law, ordinance, rule or
regulation or common law or otherwise.

9.04 LIABILITY CAP. Seller's liability, if any, under this Agreement shall never
exceed, and Seller shall have no obligation for the payment of any amount in
excess of a cumulative total of Twenty-five Million Dollars ($25,000,000).

9.05 DAMAGE LIMITATION. Notwithstanding anything to the contrary herein, in no
event shall any Party be liable to the other for any exemplary, punitive,
special, indirect, consequential, remote or speculative damages; provided,
however, that if a Party is held liable to a third party for any of such damages
and the other Party is obligated to indemnify the liable Party for the matter
that gave rise to such damages pursuant to this Agreement, then the Indemnifying
Party shall be liable for, and obligated to reimburse the Indemnified Party for
such damages.

                                       35
<PAGE>
                                    ARTICLE X

                                   TERMINATION

10.01 TERMINATION OF AGREEMENT. This Agreement and the transactions contemplated
hereby may be terminated upon written notice from the Party electing to
terminate this Agreement, in the following instances:

        (A) By Seller if the conditions set forth in Section 5.01 are not
        satisfied in all materials respects or waived as of Closing.

        (B) By Seller or Purchaser, if at or before Closing, for any reason
        under this Agreement, Oil and Gas Properties are excluded from the sale,
        which have a cumulative value, based on Exhibit D, in excess of
        twenty-five percent (25%) of the Base Purchase Price.

        (C) By Purchaser if the conditions set forth in Section 5.02 are not
        satisfied in all material respects or waived as of Closing.

        (D) At any time by the mutual written agreement of Purchaser and Seller.

        (E) By either Party if the transaction has not been approved under the
        HSR Act, if applicable, either by the expiration of the waiting period
        or receipt of consent, on or before ninety (90) days after the filing
        has been made under the HSR Act seeking approval of the transaction.

10.02 LIABILITIES UPON TERMINATION. If this Agreement is terminated prior to
Closing for any reason other than those set forth in Section 10.01 or is
breached (it shall be deemed a breach of this Agreement if the conditions set
forth in Section 5.02 are not satisfied through the fault, neglect or failure to
act of Purchaser, or if the conditions set forth in Section 5.01 are not
satisfied through the fault, neglect or failure to act of Seller), nothing
contained herein (other than the provisions of Section 1.03) shall be construed
to limit Seller's or Purchaser's legal or equitable remedies including, without
limitation, damages for the breach or failure of any representation, warranty,
covenant or agreement contained herein and the right to enforce specific
performance of this Agreement.

                                   ARTICLE XI

                                   ARBITRATION

                                       36
<PAGE>
11.01 BINDING ARBITRATION. On the request of any Party whether made before or
after the institution of any legal proceeding, any action, dispute, claim or
controversy of any kind now existing or hereafter arising between any of the
Parties in any way arising out of, pertaining to or in connection with this
Agreement (a "Dispute") shall be resolved by binding arbitration in accordance
with the terms hereof. Any Party may, by summary proceedings, bring an action in
court to compel arbitration of any Dispute.

11.02 GOVERNING RULES. Any arbitration shall be administered by the American
Arbitration Association (the "AAA") in accordance with the terms of this Article
XI, the Commercial Arbitration Rules of the AAA, and, to the maximum extent
applicable, the Federal Arbitration Act. Judgment on any award rendered by an
arbitrator may be entered in any court having jurisdiction.

11.03 ARBITRATORS. Any arbitration shall be conducted before three arbitrators.
The arbitrator shall be practicing attorneys licensed to practice in the State
of Texas who are knowledgeable in the subject matter of the Dispute selected by
agreement between the Parties. Each of the Parties shall appoint an arbitrator
within thirty (30) days after the request for an arbitration, and the AAA shall
select the third arbitrator. The arbitrators may engage engineers, accountants
or other consultants that the arbitrator deems necessary to render a conclusion
in the arbitration proceeding.

11.04 CONDUCT OF ARBITRATION. To the maximum extent practicable, an arbitration
proceeding hereunder shall be concluded within one hundred eighty (180) days of
the filing of the Dispute with the AAA. Arbitration proceedings shall be
conducted in Houston, Texas. Arbitrators shall be empowered to impose sanctions
and to take such other actions as the arbitrators deem necessary to the same
extent a judge could impose sanctions or take such other actions pursuant to the
Federal Rules of Civil Procedure and applicable law. At the conclusion of any
arbitration proceeding, the arbitrators shall make specific written findings of
fact and conclusions of law. The arbitrators shall have the power to award
recovery of all costs and fees to the prevailing Party. Each Party agrees to
keep all Disputes and arbitration proceedings strictly confidential except for
disclosure of information required by applicable law.

11.05 COSTS OF ARBITRATION.All fees of the arbitrators and any engineer,
accountant or other consultant engaged by the arbitrators, shall be paid by
Purchaser and Seller equally unless otherwise awarded by the arbitrators.

                                   ARTICLE XII

                                       37
<PAGE>
                                  MISCELLANEOUS

12.01 FILES AND RECORDS. Within thirty (30) days following the Effective Time,
Purchaser shall remove from Seller's office at Purchaser's expense all original
records and files, including, without limitation, regulatory files, joint
interest billings, revenue files, division orders, division order files,
purchasers statements, payout calculations, well logs, well files, land records,
contracts, maps and seismic information (to the extent capable of being legally
transferred by Seller without unreasonable cost or consent) relating to the
Subject Properties. In the event Seller wishes to keep copies of such files and
records, Seller may make and retain copies thereof at any time during normal
business hours within thirty (30) days of the Effective Time. The expense of
copying such files shall be borne by Seller. Purchaser shall retain, or cause to
be retained, all of such files for seven (7) years from the Effective Time and
shall make such files available to Seller for its review and additional copying
at Seller's cost at any time during such seven (7) year period during normal
business hours. Seller agrees to make available to Purchaser during normal
business hours, where and as kept in the normal course of business, at
Purchaser's cost and expense and upon reasonable prior notice, such records
which may be retained by Seller, if any, which may be necessary or beneficial to
Purchaser in connection with the ownership or operation of the Properties or in
order to comply with any law, rule or regulation.

12.02 TAX PRORATIONS. Real and personal property taxes for the Subject
Properties shall be prorated between Purchaser and Seller as of the Effective
Time. If the actual taxes are not known on the Closing Date, Seller's share of
such taxes shall be determined by using (i) the rates and millage for the year
prior to the year in which the Closing occurs, with appropriate adjustments for
any known and verifiable changes thereto, and (ii) the assessed values for the
year in which Closing occurs. No further proration of taxes will be made post
Closing notwithstanding the existence of a different tax amount reflected by the
actual tax statements.

12.03 POST CLOSING FILINGS AND NOTIFICATIONS. Promptly after Closing, Purchaser
shall (a) record the assignments of the Subject Properties executed at Closing
in all applicable real property records, (b) send notices to vendors supplying
goods and services for the Subject Properties of the assignment of the Subject
Properties to Purchaser and, if applicable, the designation of Purchaser or
Purchaser's Nominee as the Operator thereof, (c) actively pursue the
unconditional approval by the Minerals Management Service and all other
applicable governmental authorities of the assignment of the Subject Properties
to Purchaser and the designation of Purchaser or Purchaser's Nominee as the
Operator thereof, and (d) actively pursue all other consents, notices and
approvals that may be required in connection with the assignment of the Subject
Properties to Purchaser or

                                       38
<PAGE>
Purchaser's Nominee, and the assumption of the liabilities assumed by Purchaser
hereunder, which have not been obtained prior to Closing. Purchaser obligates
itself and Purchaser's Nominee to take any and all action required by the
Minerals Management Service or any other regulatory agency in order to obtain
such unconditional approval, including but not limited to, the posting of any
and all bonds or other security that may be required in excess of its existing
lease, pipeline or area-wide bond.

12.04 SURVIVAL OF REPRESENTATION, WARRANTIES AND COVENANTS. The obligations and
liabilities of the Parties under each of their representations, warranties and
covenants contained in this Agreement shall survive Closing and the execution
and delivery of the documents to be delivered at Closing and remain in full
force and effect.

12.05 DECEPTIVE TRADE PRACTICES WAIVER. To the extent applicable to the
transaction contemplated hereby or any portion thereof, Purchaser waives the
provisions of the Texas Deceptive Trade Practices Act (Sections 17.41 through
17.63 thereof, inclusive of the Texas Business and Commerce Code, other than
Section 17.555 thereof which is not waived), and any comparable act in any other
state in which the Subject Properties are located. In connection with such
waiver, Purchaser hereby represents and warrants to Seller that Purchaser (i) is
in the business of seeking or acquiring by purchase or lease, goods, or
services, for commercial or business use, (ii) has knowledge and experience in
financial and business matters that enable it to evaluate the merits and risks
of the transaction contemplated hereby, (iii) is not in a significantly
disparate bargaining position, and (iv) has assets of $5,000,000 or more
according to its most recent financial statement.

12.06 NO SALES TAXES. No sales, transfer or similar tax will be collected at
Closing from Purchaser in connection with this transaction. If, however, this
transaction is later deemed to be subject to sales, transfer or similar tax, for
any reason, Purchaser agrees to be solely responsible, and shall indemnify and
hold Seller (and its Affiliates, and the respective directors, officers,
employees, attorneys, contractors and agents of Seller and such Affiliates)
harmless, for any and all sales, transfer or other similar taxes (including
related penalty, interest or legal costs) due by virtue of this transaction on
the Subject Properties transferred pursuant hereto and the Purchaser shall remit
such taxes at that time. Seller agrees that it will cooperate with Purchaser,
and Purchaser agrees to cooperate with Seller, in demonstrating that the
requirements for exemptions from such taxes have been met.

12.07 SUSPENDED FUNDS. All third party funds held by Seller in suspense will be
transferred to Purchaser at Closing. Purchaser shall indemnify and hold harmless
Seller from and against any

                                       39
<PAGE>
claim, loss, cost or expense whatsoever arising after Closing from improper,
untimely or other mispayment of such suspended funds transferred to Purchaser at
Closing.

12.08 NOTICES. All communication or notices required or permitted to be given
under this Agreement shall be in writing, and any communication or notice shall
be deemed to have been duly made if actually delivered, including delivery by
facsimile transmission, receipt of which has been duly acknowledged, or if
mailed by registered or certified mail, postage prepaid, and addressed to:

        (A) Purchaser:              Kelley Oil & Gas Corporation
                                    601 Jefferson, Suite 1100
                                    Houston, TX 77002
                                    Telephone: 713-652-5200
                                    Facsimile: 713-652-5255

        (B)  Seller:                SCANA Petroleum Resources, Inc.
                                    1200 Smith Street
                                    Suite 500
                                    Houston, TX  77002
                                    Attention:     President
                                    Telephone:     (713) 658-8585
                                    Facsimile:     (713) 658-1825

                                    with a copy to:

                                    Ernest L. Nix, Jr.
                                    Davidson, Nix & Jones
                                    509 Market Street, Suite 800
                                    Shreveport, La. 71101
                                    Telephone:     (318) 424-4342
                                    Facsimile:     (318) 226-0168

                                    Wire Transfer Instructions:

                                       40
<PAGE>
                                    Bank: NationsBank of Texas
                                    Account Name:SCANA Petroleum Resources, Inc.
                                    ABA Number: 111000025
                                    Account Number: 187167570

                                    Once the wire transfer has been completed,
please notify:

                        Chuck Morgan, V.P. and Controller

                         SCANA Petroleum Resources, Inc.
                            (713) 658-8585, Ext. 108

A Party may, by written notice so delivered to the other Party, change the
address to which communications or written notices shall be made under this
Agreement.

12.09 FURTHER ASSURANCES. Seller and Purchaser agree that they will, upon
request, deliver, or will cause to be executed, acknowledged and delivered, all
such documents of further assurance as may be reasonably required for the
assigning, transferring, granting, conveying and confirming to Purchaser, or
reducing to possession by Purchaser of, any of the Subject Properties and will,
perform and take such further actions, as may be necessary or appropriate to
carry out the intent of the transactions provided for in this Agreement. Each
Party shall bear its own costs in connection with the preparation or filing of
any such documents of further assurance. Purchaser and Seller acknowledge that
as of the Closing Date Seller may (a) have unpaid joint interest accounts
receivable due from joint working interest owners in the Subject Properties, (b)
have erroneously overpaid certain royalty interest owners who have not repaid
such sums, and/or (c) be entitled to refunds, such as ad valorem taxes,
attributable to the Subject Properties prior to the Effective Time. Purchaser
agrees to cooperate with Seller and to assist in any proper manner to secure
such monies and to remit to Seller any such monies received.

12.10 CHOICE OF LAW. THIS AGREEMENT SHALL BE GOVERNED AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF TEXAS WITHOUT GIVING EFFECT TO ANY
PRINCIPLES OF CONFLICTS OF LAWS. THE VALIDITY OF THE VARIOUS CONVEYANCES
AFFECTING THE TITLE TO REAL PROPERTY SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE JURISDICTION IN WHICH SUCH PROPERTY IS SITUATED.
THE REPRESENTATIONS AND WARRANTIES CONTAINED IN SUCH CONVEYANCES AND THE
REMEDIES AVAILABLE BECAUSE OF A BREACH OF SUCH REPRESENTATIONS AND WARRANTIES
SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF

                                       41
<PAGE>
THE STATE OF TEXAS WITHOUT GIVING EFFECT TO THE PRINCIPLES OR CONFLICTS OF LAWS.

12.11 ASSIGNMENT. This Agreement shall not be assignable by either Party without
the prior written consent of the other Party.

12.12 BINDING EFFECT. This Agreement contains the entire agreement and
understanding between the Parties with respect to the purchase and sale of the
Subject Properties or other transactions contemplated herein. This Agreement may
not be amended or terminated except in writing, signed by the Parties. In the
event any term or provision of this Agreement is determined to be invalid or
unenforceable, such invalidity or unenforceability thereof shall not affect the
remaining terms and provisions of this Agreement.

12.13 COUNTERPARTS. This Agreement may be executed in any number of counterparts
and each counterpart shall be deemed to be an original instrument, but all such
counterparts shall constitute but one instrument.

12.14 EXPENSES AND FEES. Whether or not the transactions contemplated by this
Agreement are consummated, each of the Parties shall be obligated to pay the
fees and expense of its counsel, accountants and other experts incident to the
negotiation and preparation of this Agreement and consummation of the
transactions contemplated hereby. All sales, use or other taxes (other than
taxes on gross income, net income or gross receipts) and duties, levies or other
governmental charges incurred by or imposed with respect to the property
transfers undertaken pursuant to this Agreement and all costs of recording the
Assignments and any other recordable document shall be the responsibility of,
and shall be paid by, Purchaser. All other costs shall be borne by the Party
incurring such costs. In the event that sales taxes are due on this transaction
which must be remitted by Seller under the laws of the governing jurisdiction,
Seller, at its option, may provide for the payment of such amounts to Seller by
an appropriate increase in the Base Purchase Price at Closing.

12.15 CONFIDENTIALITY. Prior to Closing, unless otherwise required by law,
neither Party will, without the consent of the other issue a press release or
disclose to any third party (not including the officers, directors, advisors,
agents and representatives of the Parties, on a "need-to-know" basis), this
Agreement or the transaction contemplated by its terms and provisions. All
notices to third parties and all other publicity concerning the transactions
contemplated by this Agreement shall be jointly planned and coordinated by and
between Purchaser and Seller, provided that both Seller and

                                       42
<PAGE>
Purchaser shall have final approval authority for their own press releases and
securities filings, and are hereby authorized to issue such press releases
concerning this Agreement and to make such filings as Seller or Purchaser and
its counsel may deem necessary or appropriate under applicable securities laws.
Except as provided in the preceding sentence, neither of the Parties shall act
unilaterally in this regard without the prior written approval of the other
Party, however, this approval shall not be unreasonably withheld.

12.16 EXHIBITS. The Exhibits and Schedules referred to in this Agreement are
hereby incorporated in this Agreement by this reference and constitute a part of
this Agreement. Each Party has received a complete set of Exhibits and Schedules
as of the execution of this Agreement. If any Exhibit or Schedule inadvertently
fails to list any information which had been listed on another Exhibit or
Schedule, such information will be deemed to be included on the appropriate
Exhibit or Schedule. Seller may, from time to time prior to or at the Closing,
with the agreement of Purchaser, which shall not be unreasonably withheld,
supplement or amend any such Exhibit or Schedule, one or more supplements or
amendments in order to correct any matter which would constitute a breach of any
representation, warranty or covenant contained herein. The Parties understand
and agree that subject to the terms of Section 7.07 herein, an adjustment to the
Base Purchase Price shall be made at Closing to the extent that any such
supplement or amendment to correct any matter which would constitute a breach of
any representation, warranty or covenant contained herein results in an increase
or decrease in the WI or NRI and corresponding value attributable to the
affected Lease or Well, based on the ratio of the correct interest to that
contained in the applicable Exhibit or Schedule, multiplied by the applicable
Lease or Well allocated value contained in Exhibit D (an "Adjustment"). All
references to any Exhibit or Schedule hereto which is supplemented or amended as
provided in this Section 12.16 shall for all purposes after Closing be deemed to
be a reference to such Exhibit or Schedule as so supplemented or amended.

12.17 EXCHANGE. Either Party may desire to structure the conveyance of the
Subject Properties as part of an exchange under Section 1031 of the Internal
Revenue Code. Each Party agrees to execute all documents, conveyances or other
instruments necessary to effectuate an exchange. In order to structure such a
transaction, Seller and Purchaser will agree upon an allocation of the Base
Purchase Price between real and personal property.

     ENTIRETIES This Agreement, including the Exhibits, the other agreements to
be entered into by the Parties under the provisions of this Agreement and the
Confidentiality Agreement dated September 12, 1997, executed by Purchaser and
Seller set forth the entire agreement and understanding of the Parties in
respect of the transactions contemplated hereby and supersede all

                                       43
<PAGE>
prior agreements, prior arrangements and prior understandings relating to the
subject matter hereof whether oral or written.

12.19 CORPORATE APPROVALS. The Parties understand and agree that notwithstanding
any provision hereof to the contrary, this Agreement is executed contingent upon
receipt of approval by the Parties' Boards of Directors of this Agreement and
the transaction contemplated hereby. Each Party agrees to promptly submit this
Agreement to its respective Board of Directors for approval. This Agreement
shall automatically terminate and be of no force or effect if such approvals,
which will not unreasonably be withheld, are not given by 2:00 p.m. Central
Daylight Time, October 21, 1997.

[SIGNATURES ON FOLLOWING PAGE]

                                       44
<PAGE>
        IN WITNESS THEREOF, Purchaser and Seller have duly executed this
Agreement, as of the day and year first above written.

                                               SELLER:

Witnesses:                                     SCANA PETROLEUM RESOURCES, INC.

/S/ C. CATHY PIERCE                            /S/ JIM CANTWELL 
                                                   Jim Cantwell

/S/ VIRGINIA JOHNSON                           President

                                               PURCHASER:

Witnesses:                                     KELLEY OIL & GAS CORPORATION

/S/ THOMAS E. BAKER                            /S/ JOHN F. BOOKOUT JR.
                                               John F. Bookout, Jr.

/S/ DAVID C. BAGGETT                           President

                                       45
<PAGE>
                           PURCHASE AND SALE AGREEMENT
                             dated October 21, 1997

                    LIST OF SCHEDULES / EXHIBITS (Not Filed)*

Exhibit A                                  Leases

Exhibit A-1                                Wells

Exhibit A-2                                Seismic Contracts

Exhibit B                                  Excluded Assets

Exhibit B-1                                Litigation Retained by Seller

Exhibit C                                  Form of Assignment and Bill of Sale

Exhibit C-1                                Form of Assignment and Mineral Deed

Exhibit C-2                                MMS Assignment of Record Title to Oil
                                           and Gas Leases

Exhibit C-3                                MMS Assignment of Operating Rights in
                                           Oil and Gas Leases

Exhibit C-4                                MMS Assignment of ROW

Exhibit D                                  Base Purchase Price Allocation

Exhibit E                                  Imbalance Schedule for the Subject
                                           Properties

Exhibit F                                  Litigation to be Assumed by Purchaser

Exhibit G                                  Exploration Agreements

* Omitted Schedules/Exhibits will be furnished to the Securities and Exchange
Commission, supplementally, if requested.

                                       46



                                                                    EXHIBIT 99.1

                     AMENDED AND RESTATED CREDIT AGREEMENT

                                     AMONG

                         KELLEY OIL & GAS CORPORATION,
                            KELLEY OIL CORPORATION,
                                      AND
                        KELLEY OPERATING COMPANY, LTD.,
                                 AS BORROWERS,

                         CONCORDE GAS MARKETING, INC.,
           KELLEY PARTNERS 1992 DEVELOPMENT DRILLING JOINT VENTURE,
           KELLEY PARTNERS 1994 DEVELOPMENT DRILLING JOINT VENTURE,
              KELLEY PARTNERS 1992 DEVELOPMENT DRILLING PROGRAM,
                                      AND
              KELLEY PARTNERS 1994 DEVELOPMENT DRILLING PROGRAM,
                                AS GUARANTORS,

                   TEXAS COMMERCE BANK NATIONAL ASSOCIATION,
                                   AS AGENT,

                            CHASE SECURITIES INC.,
                      AS ARRANGER AND SYNDICATION AGENT,

                                      AND
                         THE LENDERS SIGNATORY HERETO

                         DATED AS OF DECEMBER 1, 1997

                    $140,000,000 REVOLVING CREDIT FACILITY
                 $32,300,000 SENIOR SECURED TERM LOAN FACILITY
<PAGE>
                               TABLE OF CONTENTS
                                                                          PAGE

                                  ARTICLE I

                      DEFINITIONS AND ACCOUNTING MATTERS


      Section 1.01  TERMS DEFINED ABOVE......................................1
      Section 1.02  CERTAIN DEFINED TERMS....................................1
      Section 1.03  ACCOUNTING TERMS AND DETERMINATIONS.....................22

                                  ARTICLE II

                                 COMMITMENTS

      Section 2.01  LOANS AND LETTERS OF CREDIT.............................23
      Section 2.02  BORROWINGS, CONTINUATIONS AND CONVERSIONS; LETTERS OF 
                    CREDIT..................................................24
      Section 2.03  CHANGES OF REVOLVING CREDIT COMMITMENTS.................26
      Section 2.04  FEES....................................................26
      Section 2.05  SEVERAL OBLIGATIONS.....................................28
      Section 2.06  NOTES...................................................28
      Section 2.07  PREPAYMENTS.............................................29
      Section 2.08  BORROWING BASE..........................................30
      Section 2.09  ASSUMPTION OF RISKS.....................................32
      Section 2.10  OBLIGATION TO REIMBURSE AND TO PREPAY...................33
      Section 2.11  LENDING OFFICES.........................................35

                                 ARTICLE III

                      PAYMENTS OF PRINCIPAL AND INTEREST

      Section 3.01  REPAYMENT OF LOANS......................................35
      Section 3.02  INTEREST................................................35

                                    -i-
<PAGE>
                                  ARTICLE IV

               PAYMENTS; PRO RATA TREATMENT; COMPUTATIONS; ETC.


      Section 4.01  PAYMENTS................................................36
      Section 4.02  PRO RATA TREATMENT......................................37
      Section 4.03  COMPUTATIONS............................................37
      Section 4.04  NON-RECEIPT OF FUNDS BY THE AGENT.......................37
      Section 4.05  SETOFF, SHARING OF PAYMENTS, ETC........................38
      Section 4.06  TAXES...................................................39
      Section 4.07  DISPOSITION OF PROCEEDS.................................42
      Section 4.08  JOINT AND SEVERAL.......................................42

                                  ARTICLE V

                               CAPITAL ADEQUACY

      Section 5.01  ADDITIONAL COSTS, ETC...................................43
      Section 5.02  LIMITATION ON EURODOLLAR LOANS..........................45
      Section 5.03  ILLEGALITY..............................................46
      Section 5.04  BASE RATE LOANS PURSUANT TO SECTIONS 5.01, 5.02 AND 
                    5.03....................................................46
      Section 5.05  COMPENSATION............................................46

                                  ARTICLE VI

                             CONDITIONS PRECEDENT

      Section 6.01  INITIAL FUNDING.........................................47
      Section 6.02  INITIAL AND SUBSEQUENT LOANS AND LETTERS OF CREDIT......49

                                 ARTICLE VII

                        REPRESENTATIONS AND WARRANTIES

      Section 7.01  EXISTENCE...............................................50
      Section 7.02  FINANCIAL CONDITION.....................................51

                                    -ii-
<PAGE>
      Section 7.03  LITIGATION..............................................51
      Section 7.04  NO BREACH...............................................51
      Section 7.05  AUTHORITY...............................................52
      Section 7.06  APPROVALS...............................................52
      Section 7.07  USE OF LOANS............................................52
      Section 7.08  ERISA...................................................53
      Section 7.09  TAXES...................................................54
      Section 7.10  TITLE, ETC..............................................54
      Section 7.11  NO MATERIAL MISSTATEMENTS...............................55
      Section 7.12  INVESTMENT COMPANY ACT..................................55
      Section 7.13  PUBLIC UTILITY HOLDING COMPANY ACT......................55
      Section 7.14  SUBSIDIARIES AND PARTNERSHIPS...........................56
      Section 7.15  LOCATION OF BUSINESS AND OFFICES........................56
      Section 7.16  DEFAULTS................................................56
      Section 7.17  ENVIRONMENTAL MATTERS...................................56
      Section 7.18  COMPLIANCE WITH THE LAW.................................58
      Section 7.19  INSURANCE...............................................58
      Section 7.20  HEDGING AGREEMENTS......................................59
      Section 7.21  RESTRICTION ON LIENS....................................59
      Section 7.22  SOLVENCY................................................59

                                 ARTICLE VIII

                            AFFIRMATIVE COVENANTS

      Section 8.01  FINANCIAL STATEMENTS....................................59
      Section 8.02  LITIGATION..............................................62
      Section 8.03  MAINTENANCE, ETC........................................62
      Section 8.04  ENVIRONMENTAL MATTERS...................................63
      Section 8.05  FURTHER ASSURANCES......................................64
      Section 8.06  PERFORMANCE OF OBLIGATIONS..............................64
      Section 8.07  RESERVE REPORTS.........................................64
      Section 8.08  TITLE INFORMATION.......................................66
      Section 8.09  ADDITIONAL COLLATERAL...................................66
      Section 8.10  ERISA INFORMATION AND COMPLIANCE........................67
      Section 8.11RESTRICTED SUBSIDIARIES TO BE OBLIGORS....................67
      Section 8.12REVISED SCHEDULES.........................................68
      Section 8.13CONSUMMATION OF HEDGING AGREEMENTS........................68

                                    -iii-
<PAGE>
                                  ARTICLE IX

                              NEGATIVE COVENANTS


      Section 9.01  DEBT....................................................68
      Section 9.02  LIENS...................................................70
      Section 9.03  INVESTMENTS, LOANS AND ADVANCES.........................70
      Section 9.04  DIVIDENDS, DISTRIBUTIONS AND REDEMPTIONS................71
      Section 9.05  SALES AND LEASEBACKS....................................72
      Section 9.06  NATURE OF BUSINESS......................................72
      Section 9.07  LIMITATION ON LEASES....................................72
      Section 9.08  MERGERS, ETC............................................72
      Section 9.09  PROCEEDS OF NOTES.......................................73
      Section 9.10  ERISA COMPLIANCE........................................73
      Section 9.11  SALE OR DISCOUNT OF RECEIVABLES.........................74
      Section 9.12  RATIO OF TOTAL SENIOR FUNDED DEBT TO EBITDA.............74
      Section 9.13  INTEREST COVERAGE RATIO.................................75
      Section 9.14  SALE OF OIL AND GAS PROPERTIES..........................75
      Section 9.15  ENVIRONMENTAL MATTERS...................................76
                    ---------------------
      Section 9.16  TRANSACTIONS WITH AFFILIATES............................76
                    ----------------------------
      Section 9.17  SUBSIDIARIES AND PARTNERSHIPS...........................76
                    -----------------------------
      Section 9.18  NEGATIVE PLEDGE AGREEMENTS..............................76
                    --------------------------
      Section 9.19  PARTNERSHIP AGREEMENT...................................77
                    ---------------------
      Section 9.20  SUBORDINATED DEBT AND SENIOR SUBORDINATED NOTES.........77
                    -----------------------------------------------
      Section 9.21  GAS IMBALANCES..........................................77
                    --------------

                                  ARTICLE X

                         EVENTS OF DEFAULT; REMEDIES


      Section 10.01  EVENTS OF DEFAULT......................................78
      Section 10.02  REMEDIES...............................................80

                                    -iv-
<PAGE>
                                  ARTICLE XI

                                  THE AGENT

      Section 11.01  APPOINTMENT, POWERS AND IMMUNITIES.....................81
      Section 11.02  RELIANCE BY AGENT......................................82
      Section 11.03  DEFAULTS...............................................82
      Section 11.04  RIGHTS AS A LENDER.....................................82
      Section 11.05  INDEMNIFICATION........................................83
      Section 11.06  NON-RELIANCE ON AGENT AND OTHER LENDERS................83
      Section 11.07  ACTION BY AGENT........................................83
      Section 11.08  RESIGNATION OR REMOVAL OF AGENT........................84
      Section 11.09  CSI....................................................84

                                 ARTICLE XII

                                MISCELLANEOUS

      Section 12.01  WAIVER.................................................84
      Section 12.02  NOTICES................................................85
      Section 12.03  PAYMENT OF EXPENSES, INDEMNITIES, ETC..................85
      Section 12.04  AMENDMENTS, ETC........................................87
      Section 12.05  SUCCESSORS AND ASSIGNS.................................87
      Section 12.06  ASSIGNMENTS AND PARTICIPATIONS.........................87
      Section 12.07  INVALIDITY.............................................89
      Section 12.08  COUNTERPARTS...........................................89
      Section 12.09  REFERENCES.............................................89
      Section 12.10  SURVIVAL...............................................90
      Section 12.11  CAPTIONS...............................................90
      Section 12.12  NO ORAL AGREEMENTS.....................................90
      Section 12.13  GOVERNING LAW; SUBMISSION TO JURISDICTION..............90
      Section 12.14  INTEREST...............................................91
      Section 12.15  CONFIDENTIALITY........................................92
      Section 12.16  EFFECTIVENESS..........................................93
      Section 12.17  PRIOR DEBT SECURITY INSTRUMENTS........................93

                                    -v-
<PAGE>
Exhibit A-1 - Form of Revolving Credit Note
Exhibit A-2 - Form of Term Note
Exhibit B   - Form of Borrowing, Continuation and Conversion Request 
Exhibit C   - Form of Compliance Certificate 
Exhibit D   - List of Security Instruments 
Exhibit E   - Form of Assignment Agreement 
Exhibit F   - List of Maximum Revolving Credit
Amounts and Term Loans

Schedule 7.0 - Liabilities 
Schedule 7.03 - Litigation 
Schedule 7.0 - Taxes 
Schedule 7.1 - Titles, etc.
Schedule 7.14   - Subsidiaries and Partnerships
Schedule 7.17   - Environmental Matters
Schedule 7.19   - Insurance
Schedule 7.20   - Hedging Agreements
Schedule 9.01   - Debt
Schedule 9.0   - Liens
Schedule 9.03   - Investments, Loans and Advances
Schedule 9.1   - Transactions with Affiliates

                                    -vi-
<PAGE>
            THIS AMENDED AND RESTATED CREDIT AGREEMENT dated as of December 1,
1997 is among: KELLEY OIL & GAS CORPORATION, a Delaware corporation (the
"PARENT"), KELLEY OIL CORPORATION, a Delaware corporation ("KOC"), KELLEY
OPERATING COMPANY, LTD., a limited partnership formed under the laws of the
State of Texas ("KELLEY OPERATING"; the Parent, KOC and Kelley Operating,
collectively, the "BORROWERS"); CONCORDE GAS MARKETING, INC., a Delaware
corporation ("CONCORDE"), 92 JV (as defined in Section 1.02), 94 JV (as defined
in Section 1.02), 92 DDP (as defined in Section 1.02) and 94 DDP (as defined in
Section 1.02); each of the lenders that is a signatory hereto or which becomes a
signatory hereto as provided in Section 12.06 (individually, together with its
successors and assigns, a "LENDER" and, collectively, the "LENDERS"); TEXAS
COMMERCE BANK NATIONAL ASSOCIATION (in its individual capacity, "TCB," as agent
for the Lenders (in such capacity, together with its successors in such
capacity, the "AGENT")); and CHASE SECURITIES INC. (in its individual or any
other capacity, "CSI").

                                R E C I T A L S

      A. The Borrowers have requested that the Lenders amend, extend and
rearrange all of the Prior Debt (as hereafter defined) and provide certain loans
to and extensions of credit on behalf of the Borrowers for general business
purposes; and

      B. The Lenders have agreed to amend, extend and rearrange the Prior Debt
and to make such loans and extensions of credit subject to the terms and
conditions of this Agreement.

      C. In consideration of the mutual covenants and agreements herein
contained and of the loans, extensions of credit and commitments hereinafter
referred to, the parties hereto agree to amend and restate the Prior Credit
Agreement (as hereafter defined) as follows:


                                   ARTICLE I

                      DEFINITIONS AND ACCOUNTING MATTERS

            Section 1.01 TERMS DEFINED ABOVE. As used in this Agreement, the
terms "AGENT," "BORROWERS," "CSI," "KELLEY OPERATING," "CONCORDE," "KOC,"
"LENDER," "LENDERS," "PARENT," and "TCB," shall have the meanings indicated
above.

            Section 1.02 CERTAIN DEFINED TERMS. As used herein, the following
terms shall have the following meanings (all terms defined in this Article I or
in other provisions of this Agreement in the singular to have the same meanings
when used in the plural and VICE VERSA):


                                    -1-
A:\Credit Agreement.wpd

<PAGE>



            "1999 NOTES INDENTURE" shall mean the indenture dated as of December
      15, 1992 between the Parent (as successor to Kelley Oil & Gas Partners,
      Ltd.) and United States Trust Company of New York, as Trustee, under which
      the 1999 Notes were issued, as amended, supplemented, or otherwise
      modified.

            "1999 NOTES" shall mean the 7-7/8% Convertible Subordinated Notes of
      the Parent due December 15, 1999.

            "1999 NOTES REDEMPTION DATE" shall mean the first Business Day after
      the Note Redemption Date as defined in the 1999 Note Indenture.


            "92 DDP" shall mean Kelley Partners 1992 Development Drilling
      Program, a Texas limited partnership.

            "94 DDP" shall mean Kelley Partners 1994 Development Drilling
      Program, a Texas limited partnership.

            "92 JV" shall mean Kelley Partners 1992 Development Drilling Joint
      Venture, a general partnership formed under the laws of the State of
      Texas, pursuant to the Joint Venture Agreement dated November 27, 1992
      between 92 DDP and Kelley Operating, as amended.

            "94 JV" shall mean Kelley Partners 1994 Development Drilling Joint
      Venture, a general partnership formed under the laws of the State of
      Texas, pursuant to the Joint Venture Agreement dated February 28, 1994
      between 94 DDP and Kelley Operating, as amended.

            "ADDITIONAL COSTS" shall have the meaning assigned such term in
      Section 5.01(a).

            "AFFECTED LOANS" shall have the meaning assigned such term in 
      Section 5.04.

            "AFFILIATE" of any Person shall mean (i) any Person directly or
      indirectly controlled by, controlling or under common control with such
      first Person, (ii) any director or officer of such first Person or of any
      Person referred to in clause (i) above and (iii) if any Person in clause
      (i) above is an individual, any member of the immediate family (including
      parents, spouse and children) of such individual and any trust whose
      principal beneficiary is such individual or one or more members of such
      immediate family and any Person who is controlled by any such member or
      trust.

                                    -2-
<PAGE>
      For purposes of this definition, any Person which owns directly or
      indirectly 10% or more of the securities having ordinary voting power for
      the election of directors or other governing body of a corporation or 10%
      or more of the partnership or other ownership interests of any other
      Person (other than as a limited partner of such other Person) will be
      deemed to "CONTROL" (including, with its correlative meanings, "CONTROLLED
      BY" and "UNDER COMMON CONTROL WITH") such corporation or other Person. For
      the purposes of Section 9.16, shareholders and Affiliates of BSC that
      would not be Affiliates of any of the Obligors or any of their
      Subsidiaries other than by reason of being shareholders or Affiliates of
      BSC, and that neither in fact participate in the management of any of BSC,
      BP Co., the Obligors or any of their Subsidiaries, nor are controlled by
      BSC or BP Co., or any of their respective Affiliates who in fact
      participate in the management of any of BSC, BP Co., the Obligors or any
      of their Subsidiaries, shall not be deemed to be Affiliates of the
      Obligors or any of their Subsidiaries.

            "AGREEMENT" shall mean this Amended and Restated Credit Agreement,
      as the same may from time to time be amended or supplemented.

            "AGGREGATE COMMITMENTS" at any time shall equal the sum of the
      Aggregate Revolving Credit Commitments and the Aggregate Term Commitments.

            "AGGREGATE REVOLVING CREDIT COMMITMENTS" at any time shall equal the
      amount calculated in accordance with Section 2.03.

            "AGGREGATE MAXIMUM REVOLVING CREDIT AMOUNTS" at any time shall equal
      the sum of the Maximum Revolving Credit Amounts of the Lenders
      ($140,000,000) as the same may be reduced pursuant to Section 2.03(b).

            "AGGREGATE TERM COMMITMENTS" at any time shall equal the sum of the
      Term Commitments of the Lenders.

            "APPLICABLE LENDING OFFICE" shall mean, for each Lender and for each
      Type of Loan, the lending office of such Lender (or an Affiliate of such
      Lender) designated for such Type of Loan on the signature pages hereof or
      such other offices of such Lender (or of an Affiliate of such Lender) as
      such Lender may from time to time specify to the Agent and the Borrowers
      as the office by which its Loans of such Type are to be made and
      maintained.

            "APPLICABLE MARGIN" shall mean (i) 2.0% per annum with respect to
      Term Loans accruing interest at the Base Rate and (ii) with respect to
      Revolving Credit

                                    -3-
<PAGE>
      Loans (whether Eurodollar Loans or Base Rate Loans), the applicable per
      annum percentage set forth at the appropriate intersection in the table
      shown below, based on the Threshold Utilization Percentage as in effect
      from time to time:


THRESHOLD UTILIZATION PERCENTAGE         APPLICABLE MARGIN
                                EURODOLLAR LOANS   BASE RATE LOANS
Less than or equal to 33%            1.00%               0.0%
Greater than 33%, but less than or   1.25%               0.0%
equal to 66%
Greater than 66%, but less than or   1.50%               0.0%
equal to 100%
Greater than 100%                    1.75%              0.25%

      Each change in the Applicable Margin resulting from a change in the
      Borrowing Base Utilization shall take effect at the time of such change in
      the Borrowing Base Utilization.

            "ASSIGNMENT" shall have the meaning assigned such term in Section
      12.06(b).

            "BASE RATE" shall mean, with respect to any Base Rate Loan, for any
      day, the higher of (i) the Federal Funds Rate for any such day plus 1/2 of
      1% or (ii) the Prime Rate for such day. Each change in any interest rate
      provided for herein based upon the Base Rate resulting from a change in
      the Base Rate shall take effect at the time of such change in the Base
      Rate.

            "BASE RATE LOANS" shall mean Loans that bear interest at rates based
      upon the Base Rate.

            "BASIS HEDGE" shall mean a Hedging Agreement covering the difference
      between the applicable hydrocarbon price quoted by the New York Mercantile
      Exchange and the applicable price quoted at the delivery point at which
      such production will be sold.

            "BESSEMER" shall mean Bessemer Holdings, L.P., a Delaware limited
      partnership.


                                    -4-
<PAGE>
            "BORROWING BASE" shall mean at any time an amount equal to the
      amount determined in accordance with Section 2.08.

            "BP CO." shall mean Bessemer Partners & Co.

            "BSC" shall mean Bessemer Securities Corporation.

            "BUSINESS DAY" shall mean any day other than a Saturday or Sunday or
      a day on which commercial banks are authorized or required to close in New
      York, New York or Houston, Texas and, where such term is used in the
      definition of "Quarterly Date" and, when used in connection with a
      borrowing or continuation of, a payment or prepayment of principal of or
      interest on, or a conversion of or into, or the Interest Period for, a
      Eurodollar Loan or a notice by the Borrowers with respect to any such
      borrowing or continuation, payment, prepayment, conversion or Interest
      Period, any such day which is also a day on which dealings in Dollar
      deposits are carried out in the London interbank market.

            "CHANGE OF CONTROL" shall mean (i) Bessemer or its Affiliates shall
      cease to beneficially own (within the meaning of Rule 13d-3 of the SEC
      under the Exchange Act), directly or indirectly, at least 20% (on a fully
      diluted basis) of the total of all equity interests in the Parent and at
      least 20% of the combined voting power of all securities of the Parent
      entitled to vote in the election of directors; (ii) any Person or two or
      more Persons acting in concert (other than Bessemer or its Affiliates)
      shall have acquired beneficial ownership (within the meaning of Rule 13d-3
      of the SEC under the Exchange Act), directly or indirectly, of Voting
      Stock of the Parent (or other securities convertible into such Voting
      Stock), representing a greater percentage of the combined voting power of
      all Voting Stock of the Parent than the percentage of the combined voting
      power of all Voting Stock of the Parent owned directly, or indirectly
      through Bessemer or its Affiliates; or (iii) any Person or two or more
      Persons acting in concert (other than Bessemer or its Affiliates) shall
      have acquired by contract or otherwise, or shall have entered into a
      contract or arrangement that, upon consummation, will result in its or
      their acquisition of, the power to exercise directly or indirectly, a
      controlling influence over the management or policies of the Parent.

            "CLOSING DATE" shall mean December 1, 1997.

            "CODE" shall mean the Internal Revenue Code of 1986, as amended from
      time to time and any successor statute.

                                    -5-
<PAGE>
            "COMMITMENT" shall mean, for any Lender, its Revolving Credit
      Commitment and/or its Term Commitment, as applicable.

            "CONSOLIDATED NET INCOME" shall mean with respect to the Parent and
      its Consolidated Subsidiaries, for any period, the aggregate of the net
      income (or loss) of the Parent and its Consolidated Subsidiaries after
      allowances for taxes for such period, determined on a consolidated basis
      in accordance with GAAP; PROVIDED, HOWEVER, that there shall be excluded
      from such net income (to the extent otherwise included therein) the
      following: (i) the net income of any Person in which the Parent or any
      Consolidated Subsidiary has an interest (which interest does not cause the
      net income of such other Person to be consolidated with the net income of
      the Parent and its Consolidated Subsidiaries in accordance with GAAP),
      except to the extent of the amount of dividends or distributions actually
      paid in such period by such other Person to the Parent or to a
      Consolidated Subsidiary, as the case may be; (ii) the net income (but not
      loss) of any Consolidated Subsidiary to the extent that the declaration or
      payment of dividends or similar distributions or transfers or loans by
      that Consolidated Subsidiary is not at the time permitted by operation of
      the terms of its charter or any agreement, instrument or Governmental
      Requirement applicable to such Consolidated Subsidiary, or is otherwise
      restricted or prohibited in each case determined in accordance with GAAP;
      (iii) the net income (or loss) of any Person acquired in a
      pooling-of-interests transaction for any period prior to the date of such
      transaction; (iv) any extraordinary gains or losses, including gains or
      losses attributable to Property sales not in the ordinary course of
      business; and (v) the cumulative effect of a change in accounting
      principles and any gains or losses attributable to writeups or writedowns
      of assets.

            "CONSOLIDATED SUBSIDIARIES" shall mean each Subsidiary of the Parent
      or the Borrowers (whether now existing or hereafter created or acquired)
      the financial statements of which shall be (or should have been)
      consolidated with the financial statements of the Parent or the Borrowers
      in accordance with GAAP.

            "CONTOUR" shall mean Contour Production Company L.L.C., a Delaware
      limited liability company.

            "CONTOUR TRANSACTION" shall mean the acquisition by Contour of
      27,000,000 shares of the Parent's common stock pursuant to the Option
      Agreement.

            "DDP" shall mean either 92 DDP or 94 DDP or both 92 DDP and 94 DDP,
      as the context requires.


                                    -6-
<PAGE>
            "DEBT" shall mean, for any Person the sum of the following (without
      duplication): (i) all obligations of such Person for borrowed money or
      evidenced by bonds, debentures, notes or other similar instruments
      (including principal, interest, fees and charges); (ii) all obligations of
      such Person (whether contingent or otherwise) in respect of bankers'
      acceptances, letters of credit, surety or other bonds and similar
      instruments; (iii) all obligations of such Person to pay the deferred
      purchase price of Property or services (other than for borrowed money and
      accounts payable arising in the ordinary course of business of such
      Person); (iv) all obligations under leases which shall have been, or
      should have been, in accordance with GAAP, recorded as capital leases in
      respect of which such Person is liable (whether contingent or otherwise);
      (v) all obligations under leases which require such Person or its
      Affiliate to make payments over the term of such lease, including payments
      at termination, which are substantially equal to at least eighty percent
      (80%) of the purchase price of the Property subject to such lease plus
      interest at an imputed rate of interest; (vi) all Debt and other
      obligations of others secured by a Lien on any asset of such Person,
      whether or not such Debt is assumed by such Person; (vii) all Debt and
      other obligations of others guaranteed by such Person or in which such
      Person otherwise assures a creditor against loss of the debtor or
      obligations of others; (viii) all obligations or undertakings of such
      Person to maintain or cause to be maintained the financial position or
      covenants of others or to purchase the Debt or Property of others; (ix)
      the undischarged balance of any production payment created by such Person
      or for the creation of which such Person directly or indirectly received
      payment; (x) the net aggregate mark-to-market value of all obligations of
      such Person under Hedging Agreements; and (xi) obligations to deliver
      goods or services including Hydrocarbons in consideration of advance
      payments.

            "DEFAULT" shall mean an Event of Default or an event which with
      notice or lapse of time or both would become an Event of Default.

            "DOLLARS" and "$" shall mean lawful money of the United States of 
      America.

            "EBITDA" shall mean, for any period, the sum of Consolidated Net
      Income for such period plus the following expenses or charges to the
      extent deducted from Consolidated Net Income in such period: interest,
      taxes, depreciation, depletion, amortization (including amortization of
      deferred financing costs), accretion of discount, Exploration Costs and
      other non cash charges and minus any non cash income to the extent
      included in income in such period.

            "EFFECTIVE DATE" shall have the meaning assigned such term in
      Section 12.16.

                                    -7-
<PAGE>
            "ENGINEERING REPORTS" shall have the meaning assigned such term in
      Section 2.08.

            "ENVIRONMENTAL LAWS" shall mean any and all Governmental
      Requirements pertaining to health or the environment in effect in any and
      all jurisdictions in which the Obligors or any Subsidiary is conducting or
      at any time has conducted business, or where any Property of the Obligors
      or any Subsidiary is located, including without limitation, the Oil
      Pollution Act of 1990 ("OPA"), the Clean Air Act, as amended, the
      Comprehensive Environmental, Response, Compensation, and Liability Act of
      1980 ("CERCLA"), as amended, the Federal Water Pollution Control Act, as
      amended, the Occupational Safety and Health Act of 1970, as amended, the
      Resource Conservation and Recovery Act of 1976 ("RCRA"), as amended, the
      Safe Drinking Water Act, as amended, the Toxic Substances Control Act, as
      amended, the Superfund Amendments and Reauthorization Act of 1986, as
      amended, the Hazardous Materials Transportation Act, as amended, and other
      environmental conservation or protection laws. The term "oil" shall have
      the meaning specified in OPA, the terms "hazardous substance" and
      "release" (or "threatened release") have the meanings specified in CERCLA,
      and the terms "solid waste" and "disposal" (or "disposed") have the
      meanings specified in RCRA; provided, however, that (i) in the event
      either OPA, CERCLA or RCRA is amended so as to broaden the meaning of any
      term defined thereby, such broader meaning shall apply subsequent to the
      effective date of such amendment and (ii) to the extent the laws of the
      state in which any Property of the Obligors or any Subsidiary is located
      establish a meaning for "oil," "hazardous substance," "release," "solid
      waste" or "disposal" which is broader than that specified in either OPA,
      CERCLA or RCRA, such broader meaning shall apply.

            "ERISA" shall mean the Employee Retirement Income Security Act of
      1974, as amended from time to time and any successor statute.

            "ERISA AFFILIATE" shall mean each trade or business (whether or not
      incorporated) which together with any of the Obligors or any Subsidiary
      would be deemed to be a "single employer" within the meaning of section
      4001(b)(1) of ERISA or subsections (b), (c), (m) or (o) of section 414 of
      the Code.

            "ERISA EVENT" shall mean (i) a "Reportable Event" described in
      Section 4043 of ERISA and the regulations issued thereunder, (ii) the
      withdrawal of any of the Obligors any Subsidiary or any ERISA Affiliate
      from a Plan during a plan year in which it was a "substantial employer" as
      defined in Section 4001(a)(2) of ERISA, (iii) the filing of a notice of
      intent to terminate a Plan or the treatment of a Plan

                                    -8-
<PAGE>
      amendment as a termination under Section 4041 of ERISA, (iv) the
      institution of proceedings to terminate a Plan by the PBGC or (v) any
      other event or condition that constitutes grounds under Section 4042 of
      ERISA for the termination of, or the appointment of a trustee to
      administer, any Plan.

            "EURODOLLAR LOANS" shall mean Revolving Credit Loans the interest
      rates on which are determined on the basis of rates referred to in the
      definition of "Fixed Eurodollar Rate".

            "EVENT OF DEFAULT" shall have the meaning assigned such term in
      Section 10.01.

            "EXCEPTED LIENS" shall mean: (i) Liens for taxes, assessments or
      other governmental charges or levies not yet due or which are being
      contested in good faith by appropriate action and for which appropriate
      reserves (in the good faith judgment of the management of the Parent) have
      been maintained; (ii) Liens in connection with workmen's compensation,
      unemployment insurance or other social security, old age pension or public
      liability obligations not yet due or which are being contested in good
      faith by appropriate action and for which appropriate reserves (in the
      good faith judgment of the management of the Parent) have been maintained
      in accordance with GAAP; (iii) operators', vendors', carriers',
      warehousemen's, repairmen's, mechanics', workmen's, materialmen's,
      construction or other like Liens arising by operation of law in the
      ordinary course of business or incident to the exploration, development,
      operation and maintenance of Oil and Gas Properties or statutory
      landlord's liens, each of which is in respect of obligations that have not
      been outstanding more than 125 days or which are being contested in good
      faith by appropriate proceedings and for which appropriate reserves (in
      the good faith judgment of the management of the Parent) have been
      maintained in accordance with GAAP; (iv) any Liens reserved in leases or
      farmout agreements for rent or royalties and for compliance with the terms
      of the farmout agreements or leases in the case of leasehold estates, to
      the extent that any such Lien referred to in this clause does not
      materially impair the use of the Property covered by such Lien for the
      purposes for which such Property is held by the Obligors or any Subsidiary
      or materially impair the value of such Property subject thereto; (v)
      encumbrances (other than to secure the payment of borrowed money or the
      deferred purchase price of Property or services), easements, restrictions,
      servitudes, permits, conditions, covenants, exceptions or reservations in
      any rights of way or other Property of the Obligors or any Subsidiary for
      the purpose of roads, pipelines, transmission lines, transportation lines,
      distribution lines for the removal of gas, oil, coal or other minerals or
      timber, and other like purposes, or for the joint or common use of real
      estate, rights of way, facilities and equipment, and

                                    -9-
<PAGE>
      defects, irregularities, zoning restrictions and deficiencies in title of
      any rights of way or other Property which in the aggregate do not
      materially impair the use of such rights of way or other Property for the
      purposes of which such rights of way and other Property are held by the
      Obligors or any Subsidiary or materially impair the value of such Property
      subject thereto; (vi) deposits of cash or securities to secure the
      performance of bids, trade contracts, leases, statutory obligations and
      other obligations of a like nature incurred in the ordinary course of
      business; (vii) Liens represented by the interest of a tenant or subtenant
      under a lease or sublease entered into in the ordinary course of business
      by an Obligor or a Subsidiary and not otherwise in violation of this
      Agreement; and (viii) Liens permitted by the Security Instruments.

            "EXCHANGE ACT" shall mean the Securities and Exchange Act of 1934,
      as amended.

            "EXISTING INDENTURE" shall mean the indenture dated as of June 15,
      1995, between the Parent and Chemical Bank, as Trustee, under which the
      Existing Senior Unsecured Notes have been issued, as amended, supplemented
      or otherwise modified.

            "EXISTING SENIOR UNSECURED NOTES" shall mean the unsecured 13-1/2%
      Senior Notes Due 1999 issued by the Parent under the terms and provisions
      of the Existing Indenture, in the original aggregate principal amount of
      $100,000,000, and maturing on June 15, 1999.

            "EXPLORATION COSTS" shall mean uncapitalized exploration, land,
      geophysical and dry hole costs.

            "FEDERAL FUNDS RATE" shall mean, for any day, the rate per annum
      (rounded upwards, if necessary, to the nearest 1/100 of 1%) equal to the
      weighted average of the rates on overnight federal funds transactions with
      a member of the Federal Reserve System arranged by federal funds brokers
      on such day, as published by the Federal Reserve Bank of New York on the
      Business Day next succeeding such day, provided that (i) if the date for
      which such rate is to be determined is not a Business Day, the Federal
      Funds Rate for such day shall be such rate on such transactions on the
      next preceding Business Day as so published on the next succeeding
      Business Day, and (ii) if such rate is not so published for any day, the
      Federal Funds Rate for such day shall be the average rate charged to the
      Agent on such day on such transactions as determined by the Agent.

                                    -10-
<PAGE>
            "FINANCIAL STATEMENTS" shall mean the financial statement or
      statements of the Obligors described or referred to in Section 7.02.

            "FIXED EURODOLLAR RATE" shall mean the offered quotation, if any, to
      first-class banks in the Eurodollar market by the Agent for Dollar
      deposits of amounts in funds comparable to the principal amount of the
      Eurodollar Loan to which such Fixed Eurodollar Rate is to be applicable
      with maturities comparable to the Interest Period for which such Fixed
      Eurodollar Rate will apply as of approximately 10:00 a.m. (Houston time)
      two Business Days prior to the commencement of such Interest Period.

            "FIXED RATE" shall mean, with respect to any Eurodollar Loan, a rate
      per annum (rounded upwards, if necessary, to the nearest 1/100 of 1%)
      determined by the Agent to be equal to the quotient of (i) the Fixed
      Eurodollar Rate for such Loan for the Interest Period for such Loan
      divided by (ii) 1 minus the Reserve Requirement for such Loan for such
      Interest Period.

            "GAAP" shall mean generally accepted accounting principles in the
      United States of America in effect from time to time.

            "GOVERNMENTAL AUTHORITY" shall include the country, the state,
      county, city and political subdivisions in which any Person or such
      Person's Property is located or which exercises valid jurisdiction over
      any such Person or such Person's Property, and any court, agency,
      department, commission, board, bureau or instrumentality of any of them
      including monetary authorities which exercises valid jurisdiction over any
      such Person or such Person's Property. Unless otherwise specified, all
      references to Governmental Authority herein shall mean a Governmental
      Authority having jurisdiction over, where applicable, the Obligors, their
      Subsidiaries or any of their Properties or the Agent, any Lender or any
      Applicable Lending Office.

            "GOVERNMENTAL REQUIREMENT" shall mean any law, statute, code,
      ordinance, order, determination, rule, regulation, judgment, decree,
      injunction, franchise, permit, certificate, license, authorization or
      other directive or requirement (whether or not having the force of law),
      including, without limitation, Environmental Laws, energy regulations and
      occupational, safety and health standards or controls, of any Governmental
      Authority.

            "GUARANTORS" shall mean Concorde, 92 JV, 94 JV, 92 DDP, 94 DDP and
      any other Person who becomes party to a Guaranty Agreement pursuant to the
      terms of Section 8.11.

                                    -11-
<PAGE>
            "GUARANTY AGREEMENT" shall mean an agreement executed by each of the
      Guarantors in form and substance satisfactory to the Agent guarantying,
      unconditionally, payment of the Indebtedness, as the same may be amended,
      modified or supplemented from time to time.

            "HEDGING AGREEMENTS" shall mean any commodity, interest rate or
      currency swap, rate cap, rate floor, rate collar, forward agreement or
      other exchange or rate protection agreements or any option with respect to
      any such transaction.

            "HIGHEST LAWFUL RATE" shall mean, with respect to each Lender, the
      maximum nonusurious interest rate, if any, that at any time or from time
      to time may be contracted for, taken, reserved, charged or received on the
      Notes or on other Indebtedness under laws applicable to such Lender which
      are presently in effect or, to the extent allowed by law, under such
      applicable laws which may hereafter be in effect and which allow a higher
      maximum nonusurious interest rate than applicable laws now allow.

            "HYDROCARBON INTERESTS" shall mean all rights, titles, interests and
      estates now or hereafter acquired in and to oil and gas leases, oil, gas
      and mineral leases, or other liquid or gaseous hydrocarbon leases, mineral
      fee interests, overriding royalty and royalty interests, net profit
      interests and production payment interests, including any reserved or
      residual interests of whatever nature.

            "HYDROCARBONS" shall mean oil, gas, casinghead gas, drip gasoline,
      natural gasoline, condensate, distillate, liquid hydrocarbons, gaseous
      hydrocarbons and all products refined or separated therefrom.

            "INDEBTEDNESS" shall mean any and all amounts owing or to be owing
      by the Borrowers to the Agent, the Issuing Bank, and/or Lenders in
      connection with the Loan Documents and the Letter of Credit Agreements,
      and any Hedging Agreements now or hereafter arising between the Borrowers
      and any Lender permitted by the terms of this Agreement and all renewals,
      extensions and/or rearrangements of any of the above.

            "INDEMNIFIED PARTIES" shall have the meaning assigned such term in
      Section 12.03(a).

            "INDEMNITY MATTERS" shall have the meaning assigned such term in
      Section 12.03(a).


                                    -12-
<PAGE>
            "INDENTURE" shall mean the indenture dated as of October 29, 1996,
      among the Parent, KOC, Kelley Operating and United States Trust Company of
      New York, as Trustee, under which the Senior Subordinated Notes have been
      issued, as amended, supplemented or otherwise modified.

            "INITIAL FUNDING" shall mean the amendment, extension and
      rearrangement of all of the Prior Debt pursuant to Section 6.01 hereof.

            "INITIAL RESERVE REPORT" shall mean both (i) the report prepared
      internally by SCANA Petroleum Resources, Inc. dated as of November 1, 1997
      and (ii) the report prepared by H.J. Gruy & Associates, Inc. dated as of
      July 1, 1997, both prepared with respect to the Oil and Gas Properties of
      the various Obligors (net of minority interests), a copy of each having
      been delivered to the Lenders.

            "INTEREST PERIOD" shall mean, with respect to any Eurodollar Loan,
      the period commencing on the date such Eurodollar Loan is made and ending
      on the numerically corresponding day in the first, second, third or sixth
      calendar month thereafter, as the Borrowers may select as provided in
      Section 2.02 (or such longer period as may be requested by the Borrowers
      and agreed to by the Lenders), except that each Interest Period which
      commences on the last Business Day of a calendar month (or on any day for
      which there is no numerically corresponding day in the appropriate
      subsequent calendar month) shall end on the last Business Day of the
      appropriate subsequent calendar month.

            Notwithstanding the foregoing: (i) no Interest Period may end after
      the Revolving Credit Termination Date; (ii) no Interest Period for any
      Eurodollar Loan may end after the due date of any installment, if any,
      provided for in Section 3.01 hereof to the extent that such Eurodollar
      Loan would need to be prepaid prior to the end of such Interest Period in
      order for such installment to be paid when due; (iii) each Interest Period
      which would otherwise end on a day which is not a Business Day shall end
      on the next succeeding Business Day (or, if such next succeeding Business
      Day falls in the next succeeding calendar month, on the next preceding
      Business Day); and (iv) no Interest Period shall have a duration of less
      than one month and, if the Interest Period for any Eurodollar Loans would
      otherwise be for a shorter period, such Loans shall not be available
      hereunder.

            "ISSUING BANK" shall mean TCB or any other Lender agreed to among
      the Borrowers, the Agent and such Lender to issue Letters of Credit.


                                    -13-
<PAGE>
            "JV" shall mean either 92 JV or 94 JV or both 92 JV and 94 JV, as
      the context requires.

            "JANUARY 1 RESERVE REPORT" shall mean the Reserve Report with an as
      of date of January 1 as described in Section 8.07; provided, however, the
      January 1 Reserve Report required to be delivered no later than March 31,
      1998, at the Borrower's election, may have an as of the date of December
      1, 1997.

            "JULY 1 RESERVE REPORT" shall mean the Reserve Report with an as of
      date of July 1 as described in Section 8.07.

            "LC COMMITMENT" at any time shall mean $25,000,000.

            "LC EXPOSURE" at any time shall mean the difference between (i)
      aggregate face amount of all undrawn and uncancelled Letters of Credit and
      the aggregate of all amounts drawn under all Letters of Credit and not yet
      reimbursed or funded pursuant to Section 2.10(a), minus (ii) the aggregate
      amount of all cash securing outstanding Letters of Credit pursuant to
      Section 2.10(b).

            "LETTER OF CREDIT AGREEMENTS" shall mean the written agreements with
      the Issuing Bank for any Letter of Credit, executed or hereafter executed
      in connection with the issuance by the Issuing Bank of the Letters of
      Credit, such agreements to be on the Issuing Bank's customary form for
      letters of credit of comparable amount and purpose as from time to time in
      effect or as otherwise agreed to by the Borrowers and the Issuing Bank.

            "LETTERS OF CREDIT" shall mean the letters of credit issued pursuant
      to Section 2.01(c), and "Letter of Credit" shall mean any one of the
      Letters of Credit.

            "LIEN" shall mean any interest in Property securing an obligation
      owed to, or a claim by, a Person other than the owner of the Property,
      whether such interest is based on the common law, statute or contract, and
      whether such obligation or claim is fixed or contingent, and including but
      not limited to (i) the lien or security interest arising from a mortgage,
      encumbrance, pledge, security agreement, conditional sale or trust receipt
      or a lease, consignment or bailment for security purposes or (ii)
      production payments and the like payable out of Oil and Gas Properties.
      The term "LIEN" shall include reservations, exceptions, encroachments,
      easements, rights of way, covenants, conditions, restrictions, leases and
      other title exceptions and encumbrances affecting Property. For the
      purposes of this Agreement, the Obligors or any Subsidiary shall be deemed
      to be the owner of any Property which it has

                                    -14-
<PAGE>
      acquired or holds subject to a conditional sale agreement, or leases under
      a financing lease or other arrangement pursuant to which title to the
      Property has been retained by or vested in some other Person in a
      transaction intended to create a financing.

            "LOAN DOCUMENTS" shall mean this Agreement, the Notes, the Security
      Instruments and any Hedging Agreements now or hereafter arising between
      any Obligor and any Lender or its Affiliate that is permitted by the terms
      of this Agreement and all amendments, modifications and restatements of
      any of the above.

            "LOANS" shall mean the Revolving Credit Loans and the Term Loans.

            "MAJORITY LENDERS" shall mean, at any time while no Loans are
      outstanding, Lenders having at least fifty-one percent (51%) of the
      Aggregate Commitments and, at any time while Loans are outstanding,
      Lenders holding at least fifty-one percent (51%) of the outstanding
      aggregate principal amount of the Loans (without regard to any sale by a
      Lender of a participation in any Loan under Section 12.06(c)).

            "MATERIAL ADVERSE EFFECT" shall mean any material and adverse effect
      on (i) the assets, liabilities, financial condition, business, operations
      or affairs of the Parent, the Borrowers and their Subsidiaries taken as a
      whole as at December 31, 1996, or (ii) the ability of the Parent, the
      Borrowers and their Subsidiaries taken as a whole to carry out their
      business as at the Closing Date or as proposed as of the Closing Date to
      be conducted or meet their obligations under the Loan Documents on a
      timely basis.

            "MAXIMUM REVOLVING CREDIT AMOUNT" shall mean, as to each Lender, the
      amount set forth opposite such Lender's name on EXHIBIT F under the
      caption "Maximum Revolving Credit Amounts" (as the same may be reduced
      pursuant to Section 2.03(b) hereof pro rata to each Lender based on its
      Percentage Share), as modified from time to time to reflect any
      assignments permitted by Section 12.06(b).

            "MORTGAGED PROPERTY" shall mean the Property owned by the Obligors
      and which is subject to the Liens existing and to exist under the terms of
      the Security Instruments.

            "MULTIEMPLOYER PLAN" shall mean a Plan defined as such in Section
      3(37) or 4001(a)(3) of ERISA.

            "NOTES" shall mean the Revolving Credit Notes and the Term Notes.

                                    -15-
<PAGE>
            "OBLIGORS" shall mean collectively, the Borrowers and the
      Guarantors.

            "OIL AND GAS PROPERTIES" shall mean Hydrocarbon Interests; the
      Properties now or hereafter pooled or unitized with Hydrocarbon Interests;
      all presently existing or future unitization, pooling agreements and
      declarations of pooled units and the units created thereby (including
      without limitation all units created under orders, regulations and rules
      of any Governmental Authority) which may affect all or any portion of the
      Hydrocarbon Interests; all operating agreements, contracts and other
      agreements which relate to any of the Hydrocarbon Interests or the
      production, sale, purchase, exchange or processing of Hydrocarbons from or
      attributable to such Hydrocarbon Interests; all Hydrocarbons in and under
      and which may be produced and saved or attributable to the Hydrocarbon
      Interests, including all oil in tanks, the lands covered thereby and all
      rents, issues, profits, proceeds, products, revenues and other incomes
      from or attributable to the Hydrocarbon Interests; all tenements,
      hereditaments, appurtenances and Properties in any manner appertaining,
      belonging, affixed or incidental to the Hydrocarbon Interests; and all
      Properties, rights, titles, interests and estates described or referred to
      above, including any and all Property, real or personal, now owned or
      hereinafter acquired and situated upon, used, held for use or useful in
      connection with the operating, working or development of any of such
      Hydrocarbon Interests or Property (excluding drilling rigs, automotive
      equipment or other personal property which may be on such premises for the
      purpose of drilling a well or for other similar temporary uses) and
      including any and all oil wells, gas wells, injection wells or other
      wells, buildings, structures, fuel separators, liquid extraction plants,
      plant compressors, pumps, pumping units, field gathering systems, tanks
      and tank batteries, fixtures, valves, fittings, machinery and parts,
      engines, boilers, meters, apparatus, equipment, appliances, tools,
      implements, cables, wires, towers, casing, tubing and rods, surface
      leases, rights-of-way, easements and servitudes together with all
      additions, substitutions, replacements, accessions and attachments to any
      and all of the foregoing.

            "OPTION AGREEMENT" shall have the meaning assigned in the Stock
      Purchase Agreement dated as of January 23, 1996 between the Parent and
      Contour Production Company.

            "OTHER TAXES" shall have the meaning assigned such term in Section
      4.06(b).

            "PARENT STOCK INVESTMENTS" shall mean investments in Persons or
      Property for which the consideration paid by an Obligor is common stock of
      the Parent.

                                    -16-
<PAGE>
            "PARTNERSHIP AGREEMENTS" shall mean the respective written
      partnership agreement or joint venture agreement of Kelley Operating, 92
      DDP, 94 DDP, 92 JV and 94 JV, each as amended.

            "PBGC" shall mean the Pension Benefit Guaranty Corporation or any
      entity succeeding to any or all of its functions.

            "PERCENTAGE SHARE" shall mean the percentage of the Aggregate
      Commitments to be provided by a Lender under this Agreement as indicated
      on EXHIBIT F, as modified from time to time to reflect any assignments
      permitted by Section 12.06(b).

            "PERSON" shall mean any individual, corporation, company, voluntary
      association, partnership, joint venture, trust, unincorporated
      organization or government or any agency, instrumentality or political
      subdivision thereof, or any other form of entity.

            "PLAN" shall mean any employee pension benefit plan, as defined in
      Section 3(2) of ERISA, which (i) is currently or hereafter sponsored,
      maintained or contributed to by any of the Obligors any Subsidiary or an
      ERISA Affiliate or (ii) was at any time during the preceding six calendar
      years sponsored, maintained or contributed to, by any of the Obligors, any
      Subsidiary or an ERISA Affiliate.

            "POST-DEFAULT RATE" shall mean, in respect of any principal of any
      Loan or any other amount payable by the Borrowers under this Agreement,
      any Note or any Security Instrument which is not paid when due (whether at
      stated maturity, by acceleration or otherwise), a rate per annum during
      the period commencing on the date of occurrence of an Event of Default
      until such amount is paid in full or all Events of Default are cured or
      waived equal to 2% per annum above the Base Rate as in effect from time to
      time plus the Applicable Margin (if any), but in no event to exceed the
      Highest Lawful Rate; provided, however, for a Eurodollar Loan, the
      "POST-DEFAULT RATE" for such principal shall be, for the period commencing
      on the date of occurrence of an Event of Default and ending on the earlier
      to occur of (i) the last day of the Interest Period therefor or (ii) the
      Date all Events of Default are cured or waived, 2% per annum above the
      interest rate for such Loan as provided in Section 3.02(a)(ii), but in no
      event to exceed the Highest Lawful Rate.

            "PRIME RATE" shall mean the rate of interest from time to time
      announced publicly by the Agent at the Principal Office as its prime
      commercial lending rate. Such rate is set by the Agent as a general
      reference rate of interest, taking into account such factors as the Agent
      may deem appropriate, it being understood that

                                    -17-
<PAGE>
      many of the Agent's commercial or other loans are priced in relation to
      such rate, that it is not necessarily the lowest or best rate actually
      charged to any customer and that the Agent may make various commercial or
      other loans at rates of interest having no relationship to such rate.

            "PRINCIPAL OFFICE" shall mean the principal office of the Agent,
      presently located at 712 Main Street, Houston, Texas 77002.

            "PRIOR CREDIT AGREEMENT" shall mean the Credit Agreement among the
      Obligors, the Agent, CSI and the lenders party thereto dated December 12,
      1996, as amended.

            "PRIOR DEBT" shall mean the outstanding Debt under the Prior Credit
      Agreement.

            "PROPERTY" shall mean any interest in any kind of property or asset,
      whether real, personal or mixed, or tangible or intangible.

            "QUARTERLY DATES" shall mean the last day of each January, April,
      July, and October, in each year, the first of which shall be January 31,
      1998; provided, however, that if any such day is not a Business Day, such
      Quarterly Date shall be the next succeeding Business Day.

            "REDETERMINATION DATE" shall have the meaning assigned such term in
      Section 2.08(a).

            "REGULATION D" shall mean Regulation D of the Board of Governors of
      the Federal Reserve System (or any successor), as the same may be amended
      or supplemented from time to time.

            "REGULATORY CHANGE" shall mean, with respect to any Lender, any
      change after the Closing Date in any Governmental Requirement (including
      Regulation D) or the adoption or making after such date of any
      interpretations, directives or requests applying to a class of lenders
      (including such Lender or its Applicable Lending Office) of or under any
      Governmental Requirement (whether or not having the force of law) by any
      Governmental Authority charged with the interpretation or administration
      thereof.

            "REQUIRED LENDERS" shall mean, at any time while no Loans are
      outstanding, Lenders having at least eighty percent (80%) of the Aggregate
      Commitments and, at

                                    -18-
<PAGE>
      any time while Loans are outstanding, Lenders holding at least eighty
      percent (80%) of the outstanding aggregate principal amount of the Loans
      (without regard to any sale by a Lender of a participation in any Loan
      under Section 12.06(c)).

            "REQUIRED PAYMENT" shall have the meaning assigned such term in
      Section 4.04.

            "RESERVE REPORT" shall mean each report, in form and substance
      satisfactory to the Agent, setting forth, as of each January 1 and July 1
      (or such other date in the event of an unscheduled redetermination): (i)
      the oil and gas reserves attributable to the Obligor's Mortgaged
      Properties together with a projection of the rate of production and future
      net income, taxes, operating expenses and capital expenditures with
      respect thereto as of such date, based upon the pricing assumptions
      consistent with SEC reporting requirements at the time and (ii) such other
      information as the Agent may reasonably request.

            "RESERVE REQUIREMENT" shall mean, for any Interest Period for any
      Eurodollar Loan, the average maximum rate at which reserves (including any
      marginal, supplemental or emergency reserves) are required to be
      maintained during such Interest Period under Regulation D by member banks
      of the Federal Reserve System in New York City with deposits exceeding one
      billion Dollars against "Eurocurrency liabilities" (as such term is used
      in Regulation D). Without limiting the effect of the foregoing, the
      Reserve Requirement shall reflect any other reserves required to be
      maintained by such member banks by reason of any Regulatory Change against
      (i) any category of liabilities which includes deposits by reference to
      which the Fixed Eurodollar Rate for Eurodollar Loans is to be determined
      as provided in the definition of "Fixed Eurodollar Rate" or (ii) any
      category of extensions of credit or other assets which include a
      Eurodollar Loan.

            "RESPONSIBLE OFFICER" shall mean, as to any Person, the Chief
      Executive Officer, the President or any Vice President of such Person and,
      with respect to financial matters, the term "Responsible Officer" shall
      include the Chief Financial Officer, the Treasurer or the Controller, of
      such Person. Unless otherwise specified, all references to a Responsible
      Officer herein shall mean a Responsible Officer of KOC or the Parent, as
      applicable.

            "RESTRICTED SUBSIDIARY" shall have the meaning assigned to such term
      in the Indenture.

                                    -19-
<PAGE>
            "REVOLVING CREDIT COMMITMENT" shall mean, for any Lender, its
      obligation to make Revolving Credit Loans and to participate in the
      Letters of Credit as provided in Section 2.01(c) up to the lesser of (i)
      such Lender's Maximum Revolving Credit Amount or (ii) the Lender's
      Percentage Share of the then effective Borrowing Base.

            "REVOLVING CREDIT LOANS" shall mean loans made pursuant to Section
      2.01(a).

            "REVOLVING CREDIT NOTES" shall mean the promissory note or notes
      (whether one or more) of the Borrower described in Section 2.06 and being
      in the form of EXHIBIT A-1.

            "REVOLVING CREDIT PERIOD" shall mean the period from the Closing
      Date to and ending on the Revolving Credit Termination Date.

            "REVOLVING CREDIT TERMINATION DATE" shall mean the earliest to occur
      of (i) the third anniversary of the Closing Date, (ii) the date that the
      Revolving Credit Commitments are sooner terminated pursuant to Section
      2.03(b) or (iii) the date the principal of the Revolving Credit Loans is
      accelerated pursuant to Section 10.02.

            "SCANA ACQUISITION" shall mean the acquisition by the Parent of all
      or substantially all of the Oil and Gas Properties of SCANA Petroleum
      Resources, Inc.

            "SCANA PROPERTIES" shall mean the Properties acquired by the Parent
      in the SCANA Acquisition.

            "SCHEDULED REDETERMINATION DATE" shall have the meaning assigned
      such term in Section 2.08(d).

            "SEC" shall mean the Securities and Exchange Commission or any
      successor Governmental Authority.

            "SECTION 29 TRANSACTION" shall mean the purchase, on or before June
      30, 1998, by a newly created Unrestricted Subsidiary of Oil and Gas
      properties from the Borrowers and the Restricted Subsidiaries which
      transaction qualifies for tax treatment pursuant to Section 29 of the
      Code.

            "SECURITY INSTRUMENTS" shall mean the Letters of Credit, the Letter
      of Credit Agreements, the agreements or instruments described or referred
      to in EXHIBIT D, and any and all other agreements or instruments now or
      hereafter executed and delivered

                                    -20-
<PAGE>
      by the Obligors or any Subsidiary (other than participation or similar
      agreements between any Lender and any other lender or creditor with
      respect to any Indebtedness pursuant to this Agreement) pursuant to, or as
      security for the payment or performance of the Prior Debt, the
      Indebtedness, the Notes or this Agreement, or reimbursement obligations
      under the Letters of Credit, as such agreements may be amended,
      supplemented or restated from time to time.

            "SENIOR SUBORDINATED NOTES" shall mean the 10-3/8% unsecured senior
      subordinated notes issued by the Parent under the terms and provisions of
      the Indenture in the aggregate principal amount of $125,000,000 and
      maturing on October 15, 2006.

            "SUBORDINATED DEBT" shall mean the 8-1/2% Convertible Subordinated
      Debentures due 2000 and the 1999 Notes, as assumed pursuant to the merger
      of Kelley Oil & Gas Partners, Ltd. with and into the Parent under the
      Agreement and Plan of Merger dated as of March 26, 1996.

            "SUBSIDIARY" of any Person shall mean (i) any corporation of which
      at least a majority of the outstanding shares of stock having by the terms
      thereof ordinary voting power to elect a majority of the board of
      directors of such corporation (irrespective of whether or not at the time
      stock of any other class or classes of such corporation shall have or
      might have voting power by reason of the happening of any contingency) is
      at the time directly or indirectly owned or controlled by such Person or
      one or more of its Subsidiaries or by such Person and one or more of its
      Subsidiaries, and (ii) any partnership, association, joint venture or
      other unincorporated entity which such Person or one or more of its
      Subsidiaries has more than a 50% equity or ownership interest at the time.
      Unless otherwise expressly provided, all references herein to "Subsidiary"
      shall (x) mean a Subsidiary of the Parent, including the Borrowers and (y)
      exclude all Unrestricted Subsidiaries.

            "TAXES" shall have the meaning assigned such term in Section
      4.06(a).

            "TERM COMMITMENT" shall mean, as to each Lender, its obligation to
      make a Term Loan in the amount set forth opposite such Lender's name under
      "Term Loans" on ANNEX I, as the same may be modified from time to time to
      reflect any assignment permitted by Section 12.06(b).

            "TERM LOAN TERMINATION DATE" shall mean the earlier to occur of (i)
      June 1, 1998 or (ii) the date that the Term Commitments are sooner
      canceled or the Term Loans accelerated pursuant to Section 10.02.

                                    -21-
<PAGE>
            "TERM LOANS" shall mean the term loans made pursuant to Section
      2.01(b).

            "TERM NOTES" shall mean the promissory note or notes (whether one or
      more) of the Borrower described in Section 2.06 and being in the form of
      EXHIBIT A-2.

            "THRESHOLD AMOUNT" shall have the meaning assigned to such term in
      Section 2.08(b).

            "THRESHOLD UTILIZATION PERCENTAGE" shall mean the result, expressed
      as a percentage, determined by dividing (i) the sum of (a) the aggregate
      amount of all Revolving Credit Loans outstanding PLUS (b) the LC Exposure
      by (ii) the Threshold Amount then in effect.

            "TRANSFER" shall have the meaning assigned such term in Section
      9.14.

            "TYPE" shall mean, with respect to any Loan, a Base Rate Loan or a
      Eurodollar Loan.

            "UNRESTRICTED SUBSIDIARIES" shall have the meaning assigned to such
      term in the Indenture.

            "VOTING STOCK" shall mean, with respect to any Person, capital stock
      of such Person having general voting power under ordinary circumstances to
      elect at least a majority of the board of directors, managers or trustees
      of such Person (irrespective of whether or not at the time capital stock
      of any other class or classes shall have or might have voting power by
      reason of the happening of any contingency).

            Section 1.03 ACCOUNTING TERMS AND DETERMINATIONS. Unless otherwise
specified herein, all accounting terms used herein shall be interpreted, all
determinations with respect to accounting matters hereunder shall be made, and
all financial statements and certificates and reports as to financial matters
required to be furnished to the Agent or the Lenders hereunder shall be
prepared, in accordance with GAAP, applied on a basis consistent with the
audited financial statements of the Obligors referred to in Section 7.02 (except
for changes concurred with by the Parent's independent public accountants).

                                    -22-
<PAGE>
                                  ARTICLE II

                                  COMMITMENTS

            Section 2.01  LOANS AND LETTERS OF CREDIT.

            (a) REVOLVING CREDIT LOANS. Each Lender severally agrees, on the
      terms of this Agreement, to make loans to the Borrowers during the period
      from and including (i) the Closing Date or (ii) such later date that such
      Lender becomes a party to this Agreement as provided in Section 12.06(b),
      to and up to, but excluding, the Revolving Credit Termination Date in an
      aggregate principal amount at any one time outstanding up to but not
      exceeding the amount of such Lender's Revolving Credit Commitment as then
      in effect; PROVIDED, HOWEVER, that the aggregate principal amount of all
      such Revolving Credit Loans by all Lenders hereunder at any one time
      outstanding together with the LC Exposure shall not exceed the Aggregate
      Revolving Credit Commitments. Subject to the terms of this Agreement,
      during the period from the Closing Date to and up to, but excluding, the
      Revolving Credit Termination Date, the Borrowers may borrow, repay and
      reborrow the amount described in this Section 2.01(a).

            (b) TERM LOANS. Each Lender severally agrees, subject to the terms
      and conditions of this Agreement, to make a term loan to the Borrower not
      to exceed its Term Commitment. Such Term Loan shall be made by way of a
      single borrowing made on the 1999 Notes Redemption Date. Any portion of
      each Lender's Term Commitment not utilized by such borrowing on the 1999
      Notes Redemption Date shall be permanently canceled.

            (c) LETTERS OF CREDIT. During the period from and including the
      Closing Date to, but excluding, the fifth day before the Revolving Credit
      Termination Date, the Issuing Bank, as issuing bank for the Lenders,
      agrees to extend credit for the account of any Borrower at any time and
      from time to time by issuing renewing, extending or reissuing Letters of
      Credit; PROVIDED HOWEVER, that the LC Exposure at any one time outstanding
      shall not exceed the lesser of (i) the LC Commitment and (ii) the
      Aggregate Revolving Credit Commitments, as then in effect, minus the
      aggregate principal amount of all Revolving Credit Loans then outstanding.
      The Lenders shall participate in such Letters of Credit according to their
      respective Percentage Shares.

            (d) LIMITATION ON TYPES OF LOANS. Subject to the other terms and
      provisions of this Agreement, at the option of the Borrowers, the
      Revolving Credit Loans may be Base Rate Loans or Eurodollar Loans;
      provided that, without the prior written consent of the Majority Lenders,
      no more than five (5) Eurodollar Loans may be outstanding at any time.

                                    -23-
<PAGE>
            Section 2.02 BORROWINGS, CONTINUATIONS AND CONVERSIONS; LETTERS OF
      CREDIT.

            (a) BORROWINGS. The Term Loans shall be made by way of a single
      advance by the Lenders on the 1999 Notes Redemption Date. The Borrowers
      shall give the Agent (which shall promptly notify the Lenders) advance
      notice as hereinafter provided of each borrowing hereunder, which shall
      specify the aggregate amount of such borrowing, the Type and the date
      (which shall be a Business Day) of the Loans to be borrowed and (in the
      case of Eurodollar Loans) the duration of the Interest Period therefor.

            (b) MINIMUM AMOUNTS. All Revolving Credit Loans that are Base Rate
      Loan borrowings shall be in amounts of at least $1,000,000 or the
      remaining balance of the Aggregate Revolving Credit Commitments, if less,
      or any whole multiple of $500,000 in excess thereof, and all Eurodollar
      Loans shall be in amounts of at least $2,000,000 or any whole multiple of
      $500,000 in excess thereof.

            (c) NOTICES. All borrowings, continuations and conversions shall
      require advance written notice to the Agent (which shall promptly notify
      the Lenders) in the form of EXHIBIT B hereto (or telephonic notice
      promptly confirmed by such a written notice), which in each case shall be
      irrevocable, from the Borrowers to be received by the Agent not later than
      (i) 11:00 a.m. on the date of each Base Rate Loan and (ii) 12:00 noon
      Houston time at least three Business Days prior to the date of each
      Eurodollar Loan borrowing, continuation or conversion. Without in any way
      limiting the Borrowers' obligation to confirm in writing any telephonic
      notice, the Agent may act without liability upon the basis of telephonic
      notice believed by the Agent in good faith to be from the Borrowers prior
      to receipt of written confirmation. In each such case, the Borrowers
      hereby waive the right to dispute the Agent's record of the terms of such
      telephonic notice except in the case of gross negligence or willful
      misconduct by the Agent.

            (d) CONTINUATION OPTIONS. Subject to the provisions made in this
      Section 2.02(d), the Borrowers may elect to continue all or any part of
      any Eurodollar Loan beyond the expiration of the then current Interest
      Period relating thereto by giving advance notice as provided in Section
      2.02(c) to the Agent (which shall promptly notify the Lenders) of such
      election, specifying the amount of such Loan to be continued and the
      Interest Period therefor. In the absence of such a timely and proper
      election, the Borrowers shall be deemed to have elected to convert such
      Eurodollar Loan to a Base Rate Loan pursuant to Section 2.02(e). All or
      any part of any Eurodollar Loan may be continued as provided herein,
      provided that (i) any continuation of any such Loan shall be (as to each
      Loan as continued for an applicable Interest Period) in amounts of at
      least $2,000,000 or any whole multiple of $500,000 in excess thereof and
      (ii) no Default shall have occurred and be continuing. If a Default shall

                                    -24-
<PAGE>
      have occurred and be continuing, each Eurodollar Loan shall be converted
      to a Base Rate Loan on the last day of the Interest Period applicable
      thereto.

            (e) CONVERSION OPTIONS. The Borrowers may elect to convert all or
      any part of any Eurodollar Loan on the last day of the then current
      Interest Period relating thereto to a Base Rate Loan by giving advance
      notice to the Agent (which shall promptly notify the Lenders) of such
      election. Subject to the provisions made in this Section 2.02(e), the
      Borrowers may elect to convert all or any part of any Base Rate Loan at
      any time and from time to time to a Eurodollar Loan by giving advance
      notice as provided in Section 2.02(c) to the Agent (which shall promptly
      notify the Lenders) of such election. All or any part of any outstanding
      Loan may be converted as provided herein, provided that (i) any conversion
      of any Base Rate Loan into a Eurodollar Loan shall be (as to each such
      Loan into which there is a conversion for an applicable Interest Period)
      in amounts of at least $2,000,000 or any whole multiple of $500,000 in
      excess thereof and (ii) no Default shall have occurred and be continuing.
      If a Default shall have occurred and be continuing, no Base Rate Loan may
      be converted into a Eurodollar Loan.

            (f) ADVANCES. Not later than 1:00 p.m. Houston time on the date
      specified for each borrowing hereunder, each Lender shall make available
      the amount of the Loan to be made by it on such date to the Agent, to an
      account which the Agent shall specify, in immediately available funds, for
      the account of the Borrowers. The amounts so received by the Agent shall,
      subject to the terms and conditions of this Agreement, be made available
      to the Borrowers by depositing the same, in immediately available funds,
      in an account of the Borrowers, designated by the Borrowers and maintained
      at the Principal Office.

            (g) LETTERS OF CREDIT. The Borrower shall give the Issuing Bank
      (which shall promptly notify the Lenders of such request and their
      Percentage Share of such Letter of Credit) advance notice to be received
      by the Issuing Bank not later than 12:00 noon Houston time not less than
      three (3) Business Days prior thereto of each request for the issuance and
      at least thirty (30) Business Days prior to the date of the renewal or
      extension of a Letter of Credit hereunder which request shall specify the
      amount of such Letter of Credit, the date (which shall be a Business Day)
      such Letter of Credit is to be issued, renewed or extended, the duration
      thereof, the name and address of the beneficiary thereof, the form of the
      Letter of Credit and such other information as the Agent may reasonably
      request all of which shall be reasonably satisfactory to the Agent.
      Subject to the terms and conditions of this Agreement, on the date
      specified for the issuance, renewal or extension of a Letter of Credit,
      the Agent shall issue such Letter of Credit to the beneficiary thereof.

            In conjunction with the issuance of each Letter of Credit, the
      Borrowers shall execute a Letter of Credit Agreement. In the event of any
      conflict between any provision of a Letter

                                    -25-
<PAGE>
      of Credit Agreement and this Agreement, the Obligors, the Issuing Bank,
      the Agent and the Lenders hereby agree that the provisions of this
      Agreement shall govern.

            The Issuing Bank will send to the Borrowers, the Agent and each
      Lender, immediately upon issuance of any Letter of Credit, or an amendment
      thereto, a true and complete copy of such Letter of Credit, or such
      amendment thereto.

            Section 2.03  CHANGES OF REVOLVING CREDIT COMMITMENTS.

            (a) The Aggregate Revolving Credit Commitments shall at all times be
      equal to the lesser of (i) the Aggregate Maximum Revolving Credit Amounts
      after adjustments resulting from reductions pursuant to Section 2.03(b)
      hereof or (ii) the Borrowing Base as determined from time to time.

            (b) The Borrowers shall have the right to terminate or to reduce the
      amount of the Aggregate Maximum Revolving Credit Amounts at any time or
      from time to time upon not less than three (3) Business Days' prior notice
      to the Agent (which shall promptly notify the Lenders) of each such
      termination or reduction, which notice shall specify the effective date
      thereof and the amount of any such reduction (which shall not be less than
      $2,000,000 or any whole multiple of $1,000,000 in excess thereof) and
      shall be irrevocable and effective only upon receipt by the Agent.

            (c) The Borrowers shall have the right to terminate or to reduce the
      amount of the Term Commitment at any time or from time to time, prior to
      the 1999 Notes Redemption Date, upon notice to the Agent (which shall
      promptly notify the Lenders) of each such termination or reduction, which
      notice shall specify the effective date thereof and the amount of any such
      reduction (which shall not be less than $2,000,000 or any whole multiple
      of $1,000,000 in excess thereof) and shall be irrevocable and effective
      only upon receipt by the Agent.

            (d) The Aggregate Maximum Revolving Credit Amounts and Term
      Commitment once terminated or reduced may not be reinstated.

            Section 2.04  FEES.

            (a)   COMMITMENT FEES.

                  (i) REVOLVING CREDIT FACILITY. The Borrowers shall pay to the
            Agent for the account of each Lender a commitment fee on the daily
            average unused amount of the Aggregate Revolving Credit Commitments
            for the period from and including

                                    -26-
<PAGE>
            the Closing Date up to, but excluding, the earlier of the date the
            Aggregate Revolving Credit Commitments are terminated or the
            Revolving Credit Termination Date at a rate per annum equal to the
            applicable per annum percentage set forth at the appropriate
            intersection in the table shown below, based on the Threshold
            Utilization Percentage as in effect from time to time:

            THRESHOLD UTILIZATION PERCENTAGE    COMMITMENT FEE PERCENTAGE

            Less than or equal
            to 33%                                          .300%

            Greater than 33%, but
            less than or equal
            to 66%                                          .325%

            Greater than 66%, but less                      .375%
            than or equal to 100%

            Greater than 100%                               .500%

      Accrued commitment fees payable pursuant to this Section 2.04(a)(i) shall
      be payable quarterly in arrears on each Quarterly Date and on the earlier
      of the date the Aggregate Revolving Credit Commitments are terminated or
      the Revolving Credit Termination Date.

                  (ii) The Borrowers shall pay to the Agent for the account of
            each Lender a commitment fee on the daily average unused amount of
            the Term Loans for the period from and including the Closing Date up
            to, but excluding, the 1999 Notes Redemption Date at a rate per
            annum equal to one-half of one percent (1/2 of 1%). Accrued
            commitment fees payable pursuant to this Section 2.04(a)(ii) shall
            be payable quarterly in arrears on each Quarterly Date and on the
            1999 Notes Redemption Date.

            (b)   LETTER OF CREDIT FEES.

                  (i) The Borrowers agree to pay the Agent, for the account of
            each Lender, commissions for issuing the Letters of Credit on the
            daily average outstanding of the maximum liability of the Issuing
            Bank existing from time to time under such Letter of Credit
            (calculated separately for each Letter of Credit) at the rate per
            annum equal to the Applicable Margin in effect from time to time for
            Eurodollar Loans, provided that each Letter of Credit shall bear a
            minimum aggregate commission (over the life

                                    -27-
<PAGE>
            of such Letter of Credit) of $500 and that each Letter of Credit
            shall be deemed to be outstanding up to the full face amount of the
            Letter of Credit until the Issuing Bank has received the canceled
            Letter of Credit or a written cancellation of the Letter of Credit
            from the beneficiary of such Letter of Credit in form and substance
            acceptable to the Issuing Bank, or for any reductions in the amount
            of the Letter of Credit (other than from a drawing), written
            notification from the Borrowers. Such commissions are payable
            quarterly in arrears on each Quarterly Date and on the Revolving
            Credit Termination Date.

                  (ii) The Borrowers agree to pay the Agent, for the account of
            the Issuing Bank, commissions for issuing the Letters of Credit on
            the daily average outstanding of the maximum liability of the
            Issuing Bank existing from time to time under such Letter of Credit
            (calculated separately for each Letter of Credit) at the rate of
            1/8% per annum, provided that each Letter of Credit shall bear a
            minimum commission of $100 and shall be deemed to be outstanding as
            provided in Section 2.04(b). Such aggregate commissions (over the
            life of such Letter of Credit) are payable quarterly in arrears on
            each Quarterly Date and on the Revolving Credit Termination Date.
            The commissions in this Section 2.04(c) are in addition to the
            commissions in Section 2.04(b).

            Section 2.05 SEVERAL OBLIGATIONS. The failure of any Lender to make
any Loan to be made by it or to provide funds for disbursements or
reimbursements under Letters of Credit on the date specified therefor shall not
relieve any other Lender of its obligation to make its Loan or provide funds on
such date, but no Lender shall be responsible for the failure of any other
Lender to make a Loan to be made by such other Lender or to provide funds to be
provided by such other Lender.

            Section 2.06 NOTES. The Revolving Credit Loans made by each Lender
shall be evidenced by a single promissory note of the Borrowers in substantially
the form of EXHIBIT A-1 hereto, dated (i) the Closing Date or (ii) the effective
date of an Assignment pursuant to Section 12.06(b), payable to the order of such
Lender in a principal amount equal to its Maximum Revolving Credit Amount as
originally in effect and otherwise duly completed. The Term Loans made by each
Lender shall be evidenced by a single promissory note of the Borrowers in
substantially the form of EXHIBIT A-2, dated as of (i) the Closing Date or (ii)
the effective date of an Assignment pursuant to Section 12.06(b), payable to the
order of such Lender and otherwise duly completed. The date, amount, Type,
interest rate and Interest Period of each Loan made by each Lender, and all
payments made on account of the principal thereof, shall be recorded by such
Lender on its books for its Notes, and, prior to any transfer, endorsed by such
Lender on the schedule attached to such Notes or any continuation thereof. Such
records shall be deemed conclusive absent manifest error.

                                    -28-
<PAGE>
            Section 2.07  PREPAYMENTS.

            (a) The Borrowers may prepay the Base Rate Loans upon notice (which
      may be same day notice) to the Agent (which shall promptly notify the
      Lenders), which notice shall specify the prepayment date (which shall be a
      Business Day) and the amount of the prepayment (which shall be at least
      $1,000,000 or the remaining aggregate principal balance outstanding on the
      Notes) and shall be irrevocable and effective only upon receipt by the
      Agent. The Borrower may prepay Eurodollar Loans on the same condition as
      for Base Rate Loans, except that notice shall be provided at least three
      Business Days prior to the stated prepayment date, and in addition such
      prepayments of Eurodollar Loans shall be subject to the terms of Section
      5.05 and shall be in an amount equal to all of the Eurodollar Loans for
      the Interest Period prepaid.

            (b) If, after giving effect to any termination or reduction of the
      Aggregate Maximum Revolving Credit Amounts pursuant to Section 2.03(b),
      the outstanding aggregate principal amount of the Revolving Credit Loans
      plus the LC Exposure exceeds the Aggregate Maximum Revolving Credit
      Amounts, the Borrowers shall (i) prepay the Revolving Credit Loans on the
      date of such termination or reduction in an aggregate principal amount
      equal to the excess, and (ii) if any excess remains after prepaying all of
      the Revolving Credit Loans because of LC Exposure, pay to the Agent on
      behalf of the Lenders an amount equal to the excess to be held as cash
      collateral as provided in Section 2.10(b) hereof.

            (c) Subject to Section 2.07(d), upon any redetermination of the
      amount of the Borrowing Base in accordance with Section 2.08, if the
      redetermined Borrowing Base is less than the aggregate outstanding
      principal amount of the Revolving Credit Loans plus the LC Exposure, then
      the Borrowers shall prepay such excess within 180 days of the Agent's
      notice of the new Borrowing Base; provided that at least 50% of such
      excess shall have been prepaid within 90 days of the Agent's notice. If a
      Borrowing Base deficiency remains after prepaying all of the Revolving
      Credit Loans because of LC Exposure, the Borrower shall pay to the Agent
      on behalf of the Lenders an amount equal to such Borrowing Base deficiency
      to be held as cash collateral as provided in Section 2.10(b) hereof.

            (d) If, after a Transfer of any Oil and Gas Property (other than
      Hydrocarbons in the ordinary course of business) to the extent allowed by
      Section 9.14 and the reduction in the Borrowing Base pursuant to Section
      2.08(d), the Borrowing Base is less than the aggregate outstanding
      principal amount of the Revolving Credit Loans, then the Borrowers shall
      promptly prepay the Revolving Credit Loans with the net proceeds received
      from such Transfer in an aggregate principal amount equal to such excess.

                                    -29-
<PAGE>
            (e) If, pursuant to the terms of the Purchase and Sale Agreement
      dated October 21, 1997 between SCANA Petroleum Resources, Inc. ("SCANA")
      and the Parent, any Obligor receives any cash proceeds from SCANA or any
      escrow account created in connection with such Purchase and Sale Agreement
      or the SCANA Acquisition as a result of SCANA's failure to cure any title
      defect, environmental defect or other defect of any kind whatsoever, such
      Obligor shall promptly cause such funds to be paid to the Agent on behalf
      of the Lenders as a prepayment on the Revolving Credit Loans.

            (f) Prepayments permitted or required under this Section 2.07 shall
      be without premium or penalty, except as required under Section 5.05 for
      prepayment of Eurodollar Loans. Any prepayment made during the Revolving
      Credit Period on the Revolving Credit Loans may be reborrowed subject to
      the then effective Aggregate Revolving Credit Commitments.

            Section 2.08  BORROWING BASE.

            (a) The Borrowing Base and the Threshold Amount shall be determined
      in accordance with Section 2.08(b) by the Agent with the concurrence of
      the Required Lenders and is subject to redetermination in accordance with
      Section 2.08(d). Upon any redetermination of the Borrowing Base and the
      Threshold Amount, such redetermination shall remain in effect until the
      next successive Redetermination Date. "REDETERMINATION DATE" shall mean
      the date that the redetermined Borrowing Base and the Threshold Amount
      become effective subject to the notice requirements specified in Section
      2.08(e) both for scheduled redeterminations and unscheduled
      redeterminations. So long as any of the Commitments are in effect or any
      LC Exposure or Revolving Credit Loans are outstanding hereunder, this
      facility shall be governed by the then effective Borrowing Base and the
      Threshold Amount. During the period from and after the Closing Date until
      the Borrowing Base and the Threshold Amount are redetermined pursuant to
      Section 2.08(d) or adjusted pursuant to Section 8.08(b), the amount of the
      Borrowing Base shall be $138,000,000 and the amount of the Threshold
      Amount shall be $115,000,000.

            (b) Upon receipt of the reports required by Section 8.07 and such
      other reports, data and supplemental information as may from time to time
      be reasonably requested by the Agent (the "ENGINEERING REPORTS"), the
      Agent will redetermine the Borrowing Base and the Threshold Amount. Such
      redetermination will be in accordance with its normal and customary
      procedures, consistent with other similar credits of Agent and Lenders,
      for evaluating oil and gas reserves and other related assets as such exist
      at that particular time. Each Lender, in its sole discretion, may make
      adjustments to the rates, volumes and prices and other assumptions set
      forth therein in accordance with its normal and customary procedures for
      evaluating oil and gas reserves and other related assets as such exist at
      that

                                    -30-
<PAGE>
      particular time. The Threshold Amount shall represent the customary
      conforming amount of a traditional hydrocarbon borrowing base loan (the
      "THRESHOLD AMOUNT") and the Borrowing Base shall not be less than the
      Threshold Amount. On June 1, 1998, the Borrowing Base shall automatically
      be reduced to equal the Threshold Amount in effect on such date. From and
      after such date, the Borrowing Base shall always equal the Threshold
      Amount, and any reference to the Borrowing Base shall be deemed to be a
      reference to the Threshold Amount. The Agent shall propose to the Lenders
      a new Borrowing Base and Threshold Amount within 15 days following receipt
      by the Agent and the Lenders of the Engineering Reports in a timely and
      complete manner. After having received notice of such proposal by the
      Agent, the Lenders shall have 15 days to agree or disagree with such
      proposal. If at the end of the 15 days, any Lenders have not communicated
      their approval or disapproval, such silence shall be deemed to be an
      approval. If however, any of the Lenders notify Agent within such 15 days
      of their disapproval, the Required Lenders and the Agent shall, within a
      reasonable period of time, endeavor to agree on a new Borrowing Base and
      Threshold Amount. The Agent and the Required Lenders must approve a new
      Borrowing Base and Threshold Amount. If no new Borrowing Base and the
      Threshold Amount are agreed, the existing Borrowing Base and Threshold
      Amount shall remain in place until such time as the Required Lenders do
      agree.

            (c) The Agent may exclude any Oil and Gas Property or portion of
      production therefrom or any income from any other Property from the
      Borrowing Base and the Threshold Amount, at any time, because title
      information is not reasonably satisfactory, such Property is not Mortgaged
      Property, such Property is not assignable, or such Property is subject to
      environmental risks not reasonably acceptable to the Agent, and the
      redetermined Borrowing Base and Threshold Amount as a result thereof shall
      be effective upon notice pursuant to Section 2.08(e).

            (d) So long as the Commitments are in effect and until payment in
      full of all Revolving Credit Loans hereunder, on or before 30 days
      following the receipt of the Reserve Reports required by Section 8.07(a)
      (each being a "SCHEDULED REDETERMINATION DATE"), the Lenders shall
      redetermine the amount of the Borrowing Base and the Threshold Amount in
      accordance with Section 2.08(b). In addition, the Required Lenders may
      initiate a redetermination of the Borrowing Base and the Threshold Amount
      at any other time as they so elect; provided, however, that the Required
      Lenders may initiate only one such unscheduled redetermination during any
      consecutive twelve (12) month period by specifying in writing to the
      Borrowers the date on which the Borrowers are to furnish a Reserve Report
      in accordance with Section 8.07(b) and the date on which such
      redetermination is to occur. Also, the Borrowers may request one
      additional redetermination of the Borrowing Base and the Threshold Amount
      during any consecutive twelve (12) month period by supplying a Reserve
      Report in the form of the July 1 Reserve Report. The Agent and the Lenders
      will

                                    -31-
<PAGE>
      follow the same procedure as set forth in Section 2.08(b) for
      redetermining the Borrowing Base and the Threshold Amount. Further, if the
      Borrowers Transfer any Oil and Gas Property to the extent allowed by
      Section 9.14, the Borrowing Base and the Threshold Amount shall each
      automatically be reduced upon execution of such Transfer by an amount
      equal to the Borrowing Base and the Threshold Amount value (as determined
      by the Agent in its reasonable discretion) attributed in the immediately
      preceding Borrowing Base and the Threshold Amount to the Oil and Gas
      Property which is the subject of such Transfer.

            (e) The Agent shall promptly notify in writing the Borrowers and the
      Lenders of the new Borrowing Base and the Threshold Amount. Any
      redetermination of the Borrowing Base and the Threshold Amount shall not
      be in effect until written notice is received by the Borrowers.

            Section 2.09 ASSUMPTION OF RISKS. The Borrowers assume all risks of
the acts or omissions of any beneficiary of any Letter of Credit or any
transferee thereof with respect to its use of such Letter of Credit. Neither the
Issuing Bank (except in the case of willful misconduct, gross negligence or bad
faith on the part of the Issuing Bank or any of its employees), its
correspondents, the Agent nor any Lender shall be responsible for the validity,
sufficiency or genuineness of certificates or other documents or any
endorsements thereon, even if such certificates or other documents should in
fact prove to be invalid, insufficient, fraudulent or forged; for errors,
omissions, interruptions or delays in transmissions or delivery of any messages
by mail, telex, or otherwise, whether or not they be in code; for errors in
translation or for errors in interpretation of technical terms; the validity or
sufficiency of any instrument transferring or assigning or purporting to
transfer or assign any Letter of Credit or the rights or benefits thereunder or
proceeds thereof, in whole or in part, which may prove to be invalid or
ineffective for any reason; the failure of any beneficiary or any transferee of
any Letter of Credit to comply fully with conditions required in order to draw
upon any Letter of Credit; or for any other consequences arising from causes
beyond the Issuing Bank's control or the control of the Issuing Bank's
correspondents. In addition, neither the Issuing Bank, the Agent nor any Lender
shall be responsible for any error, neglect, or default of any of the Issuing
Bank's correspondents; and none of the above shall affect, impair or prevent the
vesting of any of the Issuing Bank's, the Agent's or any Lender's rights or
powers hereunder or under the Letter of Credit Agreements, all of which rights
shall be cumulative. The Issuing Bank and its correspondents may accept
certificates or other documents that appear on their face to be in order,
without responsibility for further investigation of any matter contained therein
regardless of any notice or information to the contrary. In furtherance and not
in limitation of the foregoing provisions, the Borrowers agree that any action,
inaction or omission taken or not taken by the Issuing Bank or by any
correspondent for the Issuing Bank in good faith and without gross negligence in
connection with any Letter of Credit, or any related drafts, certificates,
documents or instruments, shall be binding on the Borrowers and shall not put
the Issuing Bank or its correspondents under any resulting liability to the
Borrowers.

                                    -32-
<PAGE>
            Section 2.10 OBLIGATION TO REIMBURSE AND TO PREPAY.

            (a) If a disbursement by the Issuing Bank is made under any Letter
      of Credit, the Borrowers shall pay to the Agent by noon Houston time on
      the Business Day following notice (or if no notice is received by noon on
      a given day, the second Business Day following such notice) of any such
      disbursement is received by the Borrowers, the amount of each such
      disbursement made by the Issuing Bank under the Letter of Credit (if such
      payment is not sooner effected as may be required under this Section 2.10
      or under other provisions of the Letter of Credit), together with interest
      on the amount disbursed from and including the date of disbursement until
      payment in full of such disbursed amount at a varying rate per annum equal
      to (i) the then applicable interest rate for Base Rate Loans through the
      first Business Day after notice of such disbursement is received by the
      Borrowers and (ii) thereafter, the Post-Default Rate for Base Rate Loans
      (but in no event to exceed the Highest Lawful Rate) for the period from
      and including the second Business Day following the date of such
      disbursement to and including the date of repayment in full of such
      disbursed amount. Subject to the conditions contained herein and
      availability, the Borrowers may satisfy their reimbursement obligation to
      the Issuing Bank with respect to any disbursement by the Issuing Bank
      under any Letter of Credit by borrowing a Revolving Credit Loan, the
      proceeds of which Loan will be used to reimburse the Issuing Bank for the
      amount of any disbursement made by it under a Letter of Credit, together
      with interest thereon to the extent provided in this Section 2.10(a). If
      the Borrowers shall fail to reimburse or cause the Issuing Bank to be
      reimbursed directly on the Business Day following notice by the Issuing
      Bank of any disbursement under a Letter of Credit (or, if the Issuing
      Bank's notice to the Borrowers pursuant to this Section 2.10(a) was
      received after noon Houston time on such date, or the Business Day next
      following such date), and on the date of such notification there shall not
      exist any Default under Sections 10.01(f) or (g), the Borrowers shall be
      deemed to have requested that Revolving Credit Loans be made and the
      Lenders shall make the Revolving Credit Loans on such date.

      The obligations of the Borrowers under this Agreement with respect to each
      Letter of Credit shall be absolute, unconditional and irrevocable and
      shall be paid or performed strictly in accordance with the terms of this
      Agreement under all circumstances whatsoever, including, without
      limitation, but only to the fullest extent permitted by applicable law,
      the following circumstances: (i) any lack of validity or enforceability of
      this Agreement, any Letter of Credit or any of the Security Instruments;
      (ii) any amendment or waiver of (including any default), or any consent to
      departure from this Agreement (except to the extent permitted by any
      amendment or waiver), any Letter of Credit or any of the Security
      Instruments; (iii) the existence of any claim, set-off, defense or other
      rights which the Borrowers may have at any time against the beneficiary of
      any Letter of Credit or any transferee of any Letter of Credit (or any
      Persons for whom any such beneficiary or any such transferee may be
      acting), the

                                    -33-
<PAGE>
      Issuing Bank, the Agent, any Lender or any other Person, whether in
      connection with this Agreement, any Letter of Credit, the Security
      Instruments, the transactions contemplated hereby or any unrelated
      transaction; (iv) any statement, certificate, draft, notice or any other
      document presented under any Letter of Credit proves to have been forged,
      fraudulent, insufficient or invalid in any respect or any statement
      therein proves to have been untrue or inaccurate in any respect
      whatsoever; (v) payment by the Issuing Bank under any Letter of Credit
      against presentation of a draft or certificate which appears on its face
      to comply, but does not comply, with the terms of such Letter of Credit;
      and (vi) any other circumstance or happening whatsoever, whether or not
      similar to any of the foregoing.

      Notwithstanding anything in this Agreement to the contrary, the Borrowers
      will not be liable for payment or performance that results from the gross
      negligence or willful misconduct of the Issuing Bank, except where the
      Borrowers, any Obligor or any Subsidiary actually recovers the proceeds
      for itself or the Issuing Bank of any payment made by the Issuing Bank in
      connection with such gross negligence or willful misconduct.

            (b) In the event of (i) the occurrence of any Event of Default and
      at the request of the Agent, (ii) any payment or prepayment pursuant to
      Sections 2.07(b) (ii) or the last sentence of Section 2.07(c) or (iii) the
      maturity of the Revolving Credit Notes, whether by acceleration or
      otherwise, an amount equal to the LC Exposure (or the excess in the case
      of Sections 2.07(b) and (c)) shall be deemed to be forthwith due and owing
      by the Borrowers to the Issuing Bank, the Agent and the Lenders as of the
      date of any such occurrence; and the Borrowers' obligation to pay such
      amount shall be absolute and unconditional, without regard to whether any
      beneficiary of any such Letter of Credit has attempted to draw down all or
      a portion of such amount under the terms of a Letter of Credit, and, to
      the fullest extent permitted by applicable law, shall not be subject to
      any defense or be affected by a right of set-off, counterclaim or
      recoupment which the Borrowers may now or hereafter have against any such
      beneficiary, the Issuing Bank, the Agent, the Lenders or any other Person
      for any reason whatsoever. Such payments shall be held by the Agent on
      behalf of the Issuing Bank and the Lenders as cash collateral securing the
      LC Exposure in an account or accounts at the Principal Office; and the
      Borrowers hereby grant to and by their deposit with the Agent grants to
      the Agent a security interest in such cash collateral. In the event of any
      such payment by the Borrowers of amounts contingently owing under
      outstanding Letters of Credit and in the event that thereafter drafts or
      other demands for payment complying with the terms of such Letters of
      Credit are not made prior to the respective expiration dates thereof, the
      Agent agrees, if no Event of Default has occurred and is continuing or if
      no other amounts are outstanding under this Agreement, the Notes or the
      Security Instruments, to promptly remit to the Borrowers amounts for which
      the contingent obligations evidenced by the Letters of Credit have ceased.


                                    -34-
<PAGE>
            (c) Each Lender severally and unconditionally agrees that it shall
      promptly reimburse the Issuing Bank an amount equal to such Lender's
      Percentage Share of any disbursement made by the Issuing Bank under any
      Letter of Credit that is not reimbursed according to this Section 2.10.

            Section 2.11 LENDING OFFICES. The Loans of each Type made by each
Lender shall be made and maintained at such Lender's Applicable Lending Office
for Loans of such Type.


                                  ARTICLE III

                      PAYMENTS OF PRINCIPAL AND INTEREST

            Section 3.01  REPAYMENT OF LOANS.

      (a) REVOLVING CREDIT LOANS. On the Revolving Credit Termination Date the
Borrowers shall repay the aggregate principal and accrued and unpaid interest
under the Revolving Credit Notes.

      (b) TERM LOANS. On the Term Loan Termination Date the Borrowers shall
repay the aggregate principal and accrued and unpaid interest under the Term
Notes.

      (c) GENERALLY. The Borrower will pay to the Agent, for the account of each
Lender, the principal payments required by this Section 3.01.

            Section 3.02  INTEREST.

      (a) INTEREST RATES. The Borrowers will pay to the Agent, for the account
of each Lender, interest on the unpaid principal amount of each Loan made by
such Lender for the period commencing on the date such Loan is made to, but
excluding, the date such Loan shall be paid in full, at the following rates per
annum:

            (i) if such a Loan is a Base Rate Loan, the Base Rate (as in effect
      from time to time) plus the Applicable Margin, but in no event to exceed
      the Highest Lawful Rate; and

            (ii) if such a Loan is a Eurodollar Loan, for each Interest Period
      relating thereto, the Fixed Rate for such Loan plus the Applicable Margin,
      but in no event to exceed the Highest Lawful Rate.


                                    -35-
<PAGE>
      (b) POST-DEFAULT RATE. Notwithstanding the foregoing, the Borrowers will
pay to the Agent, for the account of each Lender interest at the applicable
Post-Default Rate on any principal of any Loan made by such Lender, and (to the
fullest extent permitted by law) on any other amount payable by the Borrowers
hereunder, under any Security Instrument or under any Note held by such Lender
to or for account of such Lender, which shall not be paid in full when due after
taking into account applicable grace periods (whether at stated maturity, by
acceleration or otherwise), for the period commencing on the due date thereof
after taking into account applicable grace periods until the same is paid in
full.

      (c) DUE DATES. Accrued interest on Base Rate Loans shall be payable on
each Quarterly Date commencing on the first Quarterly Date after the Closing
Date, and accrued interest on each Eurodollar Loan shall be payable on the last
day of the Interest Period therefor and, if such Interest Period is longer than
three months at three-month intervals following the first day of such Interest
Period, except that interest payable at the Post-Default Rate shall be payable
from time to time on demand and interest on any Eurodollar Loan that is
converted into a Base Rate Loan (pursuant to Section 5.04) shall be payable on
the date of conversion (but only to the extent so converted).

      (d) DETERMINATION OF RATES. Promptly after the determination of any
interest rate provided for herein or any change therein, the Agent shall notify
the Lenders to which such interest is payable and the Borrowers thereof. Each
determination by the Agent of an interest rate or fee hereunder shall, except in
cases of manifest error, be final, conclusive and binding on the parties.


                                  ARTICLE IV

               PAYMENTS; PRO RATA TREATMENT; COMPUTATIONS; ETC.

            Section 4.01 PAYMENTS. Except to the extent otherwise provided
herein, all payments of principal, interest and other amounts to be made by the
Borrowers under this Agreement and the Notes and the Letter of Credit Agreements
shall be made in Dollars, in immediately available funds, to the Agent at such
account as the Agent shall specify by notice to the Borrowers from time to time,
not later than 11:00 a.m. Houston time on the date on which such payments shall
become due (each such payment made after such time on such due date to be deemed
to have been made on the next succeeding Business Day). Such payments shall be
made without (to the fullest extent permitted by applicable law) defense,
set-off or counterclaim. Each payment to be made to the Agent under this
Agreement or any Note for account of a Lender shall be paid promptly to such
Lender in immediately available funds. If the due date of any payment under this
Agreement or any Note would otherwise fall on a day which is not a Business Day
such date shall be extended to the next succeeding Business Day and interest
shall be payable for any principal so extended for the period of such extension.
At the time of each payment to the Agent of any principal of or interest on any

                                    -36-
<PAGE>
borrowing, the Borrowers shall notify the Agent of the Loans to which such
payment shall apply. In the absence of such notice the Agent may specify the
Loans to which such payment shall apply, but to the extent possible such payment
or prepayment will be applied first to the Loans comprised of Base Rate Loans.

            Section 4.02 PRO RATA TREATMENT. Except to the extent otherwise
provided herein each Lender agrees that: (i) each borrowing from the Lenders
under Section 2.01 shall be made from the Lenders pro rata in accordance with
their Percentage Share, each payment of commitment fee or other fees under
Section 2.04 expressly for the account of Lenders shall be made for account of
the Lenders pro rata in accordance with their Percentage Share, and each
termination or reduction of the amount of the Aggregate Maximum Revolving Credit
Amounts under Section 2.03(b) shall be applied to the Commitment of each Lender,
pro rata according to the amounts of its respective Commitment; (ii) each
payment of principal of Loans by the Borrowers shall be made for account of the
Lenders pro rata in accordance with the respective unpaid principal amount of
the Loans held by the Lenders; (iii) each payment of interest on Loans by the
Borrowers shall be made for account of the Lenders pro rata in accordance with
the amounts of interest due and payable to the respective Lenders; and (iv) each
reimbursement by the Borrowers of disbursements under Letters of Credit shall be
made for account of the Issuing Bank or, if funded by the Lenders, pro rata for
the account of the Lenders, in accordance with the amounts of reimbursement
obligations due and payable to each respective Lender.

            Section 4.03 COMPUTATIONS. Interest on Eurodollar Loans and fees
other than with respect to Letters of Credit shall be computed on the basis of a
year of 360 days and actual days elapsed (including the first day but excluding
the last day) occurring in the period for which such interest or fee, as
applicable, is payable, unless such calculation would exceed the Highest Lawful
Rate, in which case interest shall be calculated on the per annum basis of a
year of 365 or 366 days, as the case may be. Interest on Base Rate Loans and
fees with respect to Letters of Credit shall be computed on the basis of a year
of 365 or 366 days, as the case may be, and actual days elapsed (including the
first day but excluding the last day) occurring in the period for which such
interest or fee, as applicable, is payable.

            Section 4.04 NON-RECEIPT OF FUNDS BY THE AGENT. Unless the Agent
shall have been notified by a Lender or the Borrowers prior to the date on which
such notifying party is scheduled to make payment to the Agent (in the case of a
Lender) of the proceeds of a Loan or a payment under a Letter of Credit to be
made by it hereunder or (in the case of the Borrowers) a payment to the Agent
for account of one or more of the Lenders hereunder (such payment being herein
called the "REQUIRED PAYMENT"), which notice shall be effective upon receipt,
that it does not intend to make the Required Payment to the Agent, the Agent may
assume that the Required Payment has been made and may, in reliance upon such
assumption (but shall not be required to), make the amount thereof available to
the intended recipient(s) on such date and, if such Lender or the Borrowers (as

                                    -37-
<PAGE>
the case may be) has not in fact made the Required Payment to the Agent, the
recipient(s) of such payment shall, within one Business Day of demand, repay to
the Agent the amount so made available together with interest thereon in respect
of each day during the period commencing on the date such amount was so made
available by the Agent until but excluding the date the Agent recovers such
amount at a rate per annum which, for any Lender as recipient, will be equal to
the Federal Funds Rate, and for the Borrowers as recipient, will be equal to the
Base Rate plus the Applicable Margin.

            Section 4.05  SETOFF, SHARING OF PAYMENTS, ETC.

            (a) Each Obligor agrees that, in addition to (and without limitation
      of) any right of set-off, bankers' lien or counterclaim a Lender may
      otherwise have, upon the occurrence and during the continuance of an Event
      of Default, any each Lender shall have the right and be entitled (after
      consultation with the Agent), at its option, to offset balances held by it
      or by any of its Affiliates for account of the Obligor at any of its
      offices, in Dollars or in any other currency, against any principal of or
      interest on any of such Lender's Loans, or any other amount payable to
      such Lender hereunder, which is not paid when due (regardless of whether
      such balances are then due to such Obligor) in which case it shall
      promptly notify such Obligor and the Agent thereof, provided that such
      Lender's failure to give such notice shall not affect the validity
      thereof.

            (b) If any Lender shall obtain payment of any principal of or
      interest on any Loan made by it to the Borrowers under this Agreement (or
      reimbursement as to any Letter of Credit) through the exercise of any
      right of set-off, banker's lien or counterclaim or similar right or
      otherwise, and, as a result of such payment, such Lender shall have
      received a greater percentage of the principal or interest (or
      reimbursement) then due hereunder by the Borrowers to such Lender than the
      percentage received by any other Lenders, it shall promptly (i) notify the
      Agent and each other Lender thereof and (ii) purchase from such other
      Lenders participations in the Loans (or participations in Letters of
      Credit) made by such other Lenders (or in interest due thereon, as the
      case may be) in such amounts, and make such other adjustments from time to
      time as shall be equitable, to the end that all the Lenders shall share
      the benefit of such excess payment (net of any expenses which may be
      incurred by such Lender in obtaining or preserving such excess payment)
      pro rata in accordance with the unpaid principal and/or interest on the
      Loans held by each of the Lenders (or reimbursements of Letters of
      Credit). To such end all the Lenders shall make appropriate adjustments
      among themselves (by the resale of participations sold or otherwise) if
      such payment is rescinded or must otherwise be restored. Each Obligor
      agrees that any Lender so purchasing a participation in the Loans made by
      other Lenders (or in interest due thereon, as the case may be) may
      exercise all rights of set-off, banker's lien, counterclaim or similar
      rights with respect to such participation as fully as if such Lender were
      a direct holder of

                                    -38-
<PAGE>
      Loans (or Letters of Credit) in the amount of such participation. Nothing
      contained herein shall require any Lender to exercise any such right or
      shall affect the right of any Lender to exercise, and retain the benefits
      of exercising, any such right with respect to any other indebtedness or
      obligation of the Obligors. If under any applicable bankruptcy, insolvency
      or other similar law, any Lender receives a secured claim in lieu of a
      set-off to which this Section 4.05 applies, such Lender shall, to the
      extent practicable, exercise its rights in respect of such secured claim
      in a manner consistent with the rights of the Lenders entitled under this
      Section 4.05 to share the benefits of any recovery on such secured claim.

            Section 4.06  TAXES.

            (a) PAYMENTS FREE AND CLEAR. Any and all payments by the Borrowers
      hereunder shall be made, in accordance with Section 4.01, free and clear
      of and without deduction for any and all present or future taxes, levies,
      imposts, deductions, charges or withholdings, and all liabilities with
      respect thereto, EXCLUDING, in the case of each Lender, the Issuing Bank
      and the Agent, taxes imposed on its income, and franchise or similar taxes
      imposed on it, by (i) any jurisdiction (or political subdivision thereof)
      of which the Agent, the Issuing Bank or such Lender, as the case may be,
      is a citizen or resident or in which such Lender has an Applicable Lending
      Office, (ii) the jurisdiction (or any political subdivision thereof) in
      which the Agent, the Issuing Bank or such Lender is organized, or (iii)
      any jurisdiction (or political subdivision thereof) in which such Lender,
      the Issuing Bank or the Agent is presently doing business which taxes are
      imposed solely as a result of doing business in such jurisdiction (all
      such non-excluded taxes, levies, imposts, deductions, charges,
      withholdings and liabilities being hereinafter referred to as "TAXES"). If
      the Borrowers shall be required by law to deduct any Taxes from or in
      respect of any sum payable hereunder to the Lenders, the Issuing Bank or
      the Agent (i) the sum payable shall be increased by the amount necessary
      so that after making all required deductions (including deductions
      applicable to additional sums payable under this Section 4.06) such
      Lender, the Issuing Bank or the Agent (as the case may be) shall receive
      an amount equal to the sum it would have received had no such deductions
      been made, (ii) the Borrowers shall make such deductions and (iii) the
      Borrowers shall pay the full amount deducted to the relevant taxing
      authority or other Governmental Authority in accordance with applicable
      law.

            (b) OTHER TAXES. In addition, to the fullest extent permitted by
      applicable law, the Borrowers agree to pay any present or future stamp or
      documentary taxes or any other excise or property taxes, charges or
      similar levies that arise from any payment made hereunder or from the
      execution, delivery or registration of, or otherwise with respect to, this
      Agreement, any Assignment or any Security Instrument (hereinafter referred
      to as "OTHER TAXES").


                                    -39-
<PAGE>
            (c) INDEMNIFICATION. TO THE FULLEST EXTENT PERMITTED BY APPLICABLE
      LAW, THE OBLIGORS WILL INDEMNIFY EACH LENDER, THE ISSUING BANK AND THE
      AGENT FOR THE FULL AMOUNT OF TAXES AND OTHER TAXES (INCLUDING, BUT NOT
      LIMITED TO, ANY TAXES OR OTHER TAXES IMPOSED BY ANY GOVERNMENTAL AUTHORITY
      ON AMOUNTS PAYABLE UNDER THIS SECTION 4.06) PAID BY SUCH LENDER, THE
      ISSUING BANK OR THE AGENT (ON THEIR BEHALF OR ON BEHALF OF ANY LENDER), AS
      THE CASE MAY BE, AND ANY LIABILITY (INCLUDING PENALTIES, INTEREST AND
      EXPENSES) ARISING THEREFROM OR WITH RESPECT THERETO, WHETHER OR NOT SUCH
      TAXES OR OTHER TAXES WERE CORRECTLY OR LEGALLY ASSERTED UNLESS THE PAYMENT
      OF SUCH TAXES WAS NOT CORRECTLY OR LEGALLY ASSERTED AND SUCH LENDER'S
      PAYMENT OF SUCH TAXES OR OTHER TAXES WAS THE RESULT OF ITS GROSS
      NEGLIGENCE OR WILLFUL MISCONDUCT. ANY PAYMENT PURSUANT TO SUCH
      INDEMNIFICATION SHALL BE MADE WITHIN THIRTY (30) DAYS AFTER THE DATE ANY
      LENDER, THE ISSUING BANK OR THE AGENT, AS THE CASE MAY BE, MAKES WRITTEN
      DEMAND THEREFOR. IF ANY LENDER, THE ISSUING BANK OR THE AGENT RECEIVES A
      REFUND OR CREDIT IN RESPECT OF ANY TAXES OR OTHER TAXES FOR WHICH SUCH
      LENDER, THE ISSUING BANK OR THE AGENT HAS RECEIVED PAYMENT FROM THE
      OBLIGORS IT SHALL PROMPTLY NOTIFY THE OBLIGORS OF SUCH REFUND OR CREDIT
      AND SHALL, IF NO DEFAULT HAS OCCURRED AND IS CONTINUING, PAY AN AMOUNT
      EQUAL TO SUCH REFUND OR CREDIT TO THE OBLIGORS WITHOUT INTEREST (BUT WITH
      ANY INTEREST SO REFUNDED OR CREDITED), PROVIDED THAT THE OBLIGORS, UPON
      THE REQUEST OF SUCH LENDER, THE ISSUING BANK OR THE AGENT, AGREES TO
      RETURN SUCH REFUND OR CREDIT (PLUS PENALTIES, INTEREST OR OTHER CHARGES)
      TO SUCH LENDER, THE ISSUING BANK OR THE AGENT IN THE EVENT SUCH LENDER OR
      THE AGENT IS REQUIRED TO REPAY SUCH REFUND OR CREDIT.

            (d)   LENDER REPRESENTATIONS.

                  (i) Each Lender represents that it is either (i) a corporation
            organized under the laws of the United States of America or any
            state thereof or (ii) it is entitled to complete exemption from
            United States withholding tax imposed on or with respect to any
            payments, including fees, to be made to it pursuant to this
            Agreement (A) under an applicable provision of a tax convention to
            which the United States of America is a party or (B) because it is
            acting through a branch, agency or office in the United States of
            America and any payment to be received by it hereunder is
            effectively connected with a trade or business in the United States
            of America. Each Lender that is not a corporation organized under
            the laws of the United States of America or any state thereof agrees
            to provide to the Borrowers and the Agent on the Closing Date, or on
            the date of its delivery of the Assignment pursuant to which it
            becomes a Lender, and at such other times as required by United
            States law or as the Borrowers or the Agent shall reasonably
            request, two accurate and complete original

                                    -40-
<PAGE>
            signed copies of either (A) Internal Revenue Service Form 4224 (or
            successor form) certifying that all payments to be made to it
            hereunder will be effectively connected with a United States trade
            or business (the "FORM 4224 CERTIFICATION") or (B) Internal Revenue
            Service Form 1001 (or successor form) certifying that it is entitled
            to the benefit of a provision of a tax convention to which the
            United States of America is a party which completely exempts from
            United States withholding tax all payments to be made to it
            hereunder (the "FORM 1001 CERTIFICATION"). In addition, each Lender
            agrees that if it previously filed a Form 4224 Certification, it
            will deliver to the Borrowers and the Agent a new Form 4224
            Certification prior to the first payment date occurring in each of
            its subsequent taxable years; and if it previously filed a Form 1001
            Certification, it will deliver to the Borrowers and the Agent a new
            certification prior to the first payment date falling in the third
            year following the previous filing of such certification. Each
            Lender also agrees to deliver to the Borrowers and the Agent such
            other or supplemental forms as may at any time be required as a
            result of changes in applicable law or regulation in order to
            confirm or maintain in effect its entitlement to exemption from
            United States withholding tax on any payments hereunder, PROVIDED
            that the circumstances of such Lender at the relevant time and
            applicable laws permit it to do so. If a Lender determines, as a
            result of any change in either (i) a Governmental Requirement or
            (ii) its circumstances, that it is unable to submit any form or
            certificate that it is obligated to submit pursuant to this Section
            4.06, or that it is required to withdraw or cancel any such form or
            certificate previously submitted, it shall promptly notify the
            Borrowers and the Agent of such fact. If a Lender is organized under
            the laws of a jurisdiction outside the United States of America,
            unless the Borrowers and the Agent have received a Form 1001
            Certification or Form 4224 Certification satisfactory to them
            indicating that all payments to be made to such Lender hereunder are
            not subject to United States withholding tax, the Borrowers shall be
            entitled to withhold taxes from such payments at the applicable
            statutory rate and, if Borrowers have been notified to such effect
            by a Lender, Borrowers shall withhold taxes from such payments at
            the applicable statutory rate. Each Lender agrees to indemnify and
            hold harmless from any United States taxes, penalties, interest and
            other expenses, costs and losses incurred or payable by (i) the
            Agent as a result of such Lender's failure to submit any form or
            certificate that it is required to provide pursuant to this Section
            4.06 or (ii) the Borrowers or the Agent as a result of their
            reliance on any such form or certificate which such Lender has
            provided to them pursuant to this Section 4.06.

                  (ii) For any period with respect to which a Lender has failed
            to provide the Borrowers with the form required pursuant to this
            Section 4.06, if any, (other than if such failure is due to a change
            in a Governmental Requirement occurring

                                    -41-
<PAGE>
            subsequent to the date on which a form originally was required to be
            provided), such Lender shall not be entitled to indemnification
            under Section 4.06 with respect to taxes imposed by the United
            States which taxes would not have been imposed but for such failure
            to provide such forms; PROVIDED, HOWEVER, that should a Lender,
            which is otherwise exempt from or subject to a reduced rate of
            withholding tax becomes subject to taxes because of its failure to
            deliver a form required hereunder, the Borrowers shall take such
            steps as such Lender shall reasonably request to assist such Lender
            to recover such taxes at the expense of such Lender.

                  (iii) Any Lender claiming any additional amounts payable
            pursuant to this Section 4.06 shall use reasonable efforts
            (consistent with legal and regulatory restrictions) to file any
            certificate or document requested by the Borrowers or the Agent or
            to change the jurisdiction of its Applicable Lending Office or to
            contest any tax imposed if the making of such a filing or change or
            contesting such tax would avoid the need for or reduce the amount of
            any such additional amounts that may thereafter accrue and would
            not, in the sole determination of such Lender, be otherwise
            disadvantageous to such Lender.

            Section 4.07 DISPOSITION OF PROCEEDS. The Security Instruments
contain an assignment by the Obligors unto and in favor of the Agent for the
benefit of the Lenders of all production and all proceeds attributable thereto
which may be produced from or allocated to the Mortgaged Property, and the
Security Instruments further provide in general for the application of such
proceeds to the satisfaction of the Indebtedness and other obligations described
therein and secured thereby. Notwithstanding the assignment contained in such
Security Instruments, until the occurrence and continuance of an Event of
Default, the Lenders agree that they will neither notify the purchaser or
purchasers of such production nor take any other action to cause such proceeds
to be remitted to the Lenders, but the Lenders will instead permit such proceeds
to be paid to the Obligors.

            Section 4.08  JOINT AND SEVERAL.

            (a) The Borrowers jointly and severally, hereby irrevocably and
      unconditionally promise to pay and accept, not merely as surety but also
      as co-debtors, joint and several liability for all of the Indebtedness and
      any other obligations under the Notes, this Agreement and the Security
      Instruments, it being the intention of the Borrowers that all the
      Indebtedness and any other obligations under the Notes, this Agreement and
      the Security Instruments shall be the joint and several obligations of the
      Borrowers without preference or distinction among them.


                                    -42-
<PAGE>
            (b) Each Borrower waives any right to require the Agent and/or the
      Lenders to (i) proceed against the other Borrower or any other Person
      liable on the Indebtedness, (ii) enforce its rights against the other
      Borrower (iii) proceed or enforce their rights against or exhaust any
      security given to secure the Indebtedness (iv) have the Borrowers joined
      with each other or with the Guarantors in any suit arising out of this
      Credit Agreement and/or the Indebtedness, or (v) pursue any other remedy
      in the Agent's or Lenders' powers whatsoever. Neither the Agent nor the
      Lenders shall be required to mitigate damages or take any action to
      reduce, collect or enforce the Indebtedness. Each Borrower waives any
      defense arising by reason of any disability, lack of corporate authority
      or power, or other defense of the other Borrower or any other guarantor of
      the Indebtedness, and shall remain liable hereon regardless of whether the
      other Borrower or any other guarantor be found not liable thereon for any
      reason. Until the Indebtedness shall have been paid in full, no Borrower
      shall have any right of subrogation, and waives any right to enforce any
      remedy which the Agent or any Lender now has or may hereafter have against
      the other Borrower, and waives any benefit of any right to participate in
      any security now or hereafter held by the Agent or the Lenders. Whether
      and when to exercise any of the remedies of the Agent and the Lenders
      under any of the Loan Documents shall be in the sole and absolute
      discretion of the Agent and the Lenders, and any delay by the Agent or the
      Lenders in enforcing any remedy, including delay in conducting a
      foreclosure sale, shall not be a defense to any Borrower's liability under
      this Credit Agreement.


                                   ARTICLE V

                               CAPITAL ADEQUACY

            Section 5.01  ADDITIONAL COSTS, ETC.

            (a) EURODOLLAR REGULATIONS, ETC. The Borrowers shall pay directly to
      each Lender from time to time such amounts as such Lender may determine to
      be necessary to compensate such Lender for any costs which it determines
      are attributable to its making or maintaining of any Eurodollar Loans or
      issuing or participating in Letters of Credit hereunder or its obligation
      to make any Eurodollar Loans or issue or participate in any Letters of
      Credit hereunder, or any reduction in any amount receivable by such Lender
      hereunder in respect of any of such Eurodollar Loans, Letters of Creditor
      or such obligation (such increases in costs and reductions in amounts
      receivable being herein called "ADDITIONAL COSTS"), resulting from any
      Regulatory Change which: (i) changes the basis of taxation of any amounts
      payable to such Lender under this Agreement or any Note in respect of any
      of such Eurodollar Loans or Letters of Credit (other than taxes imposed on
      the overall net income of such Lender or of its Applicable Lending Office
      for any of such Eurodollar Loans

                                    -43-
<PAGE>
      by the jurisdiction in which such Lender has its principal office or
      Applicable Lending Office); or (ii) imposes or modifies any reserve,
      special deposit, minimum capital, capital ratio or similar requirements
      (other than the Reserve Requirement utilized in the determination of the
      Fixed Rate for such Loan) relating to any extensions of credit or other
      assets of, or any deposits with or other liabilities of such Lender
      (including any of such Eurodollar Loans or any deposits referred to in the
      definition of "Fixed Eurodollar Rate" in Section 1.02 hereof), or the
      Commitment of such Lender or the Eurodollar interbank market; or (iii)
      imposes any other condition affecting this Agreement or any Note (or any
      of such extensions of credit or liabilities) or such Lender's Commitment.
      Each Lender will notify the Agent and the Borrowers of any event occurring
      after the Closing Date which will entitle such Lender to compensation
      pursuant to this Section 5.01(a) as promptly as practicable after it
      obtains knowledge thereof and determines to request such compensation, and
      will designate a different Applicable Lending Office for the Loans of such
      Lender affected by such event if such designation will avoid the need for,
      or reduce the amount of, such compensation and will not, in the sole
      opinion of such Lender, be disadvantageous to such Lender. If any Lender
      requests compensation from the Borrowers under this Section 5.01(a), the
      Borrowers may, by notice to such Lender, suspend the obligation of such
      Lender to make additional Loans of the Type with respect to which such
      compensation is requested until the Regulatory Change giving rise to such
      request ceases to be in effect (in which case the provisions of Section
      5.04 shall be applicable).

            (b) REGULATORY CHANGE. Without limiting the effect of the provisions
      of Section 5.01(a), in the event that, by reason of any Regulatory Change
      affecting any Lender, the Eurodollar interbank market or such Lender's
      position in such market, any Lender either (i) incurs Additional Costs
      based on or measured by the excess above a specified level of the amount
      of a category of deposits or other liabilities of such Lender which
      includes deposits by reference to which the interest rate on Eurodollar
      Loans is determined as provided in this Agreement or a category of
      extensions of credit or other assets of such Lender which includes
      Eurodollar Loans or (ii) becomes subject to restrictions on the amount of
      such a category of liabilities or assets which it may hold, then, if such
      Lender so elects by notice to the Borrowers, the obligation of such Lender
      to make additional Eurodollar Loans shall be suspended until such
      Regulatory Change or other circumstances ceases to be in effect (in which
      case the provisions of Section 5.04 shall be applicable).

            (c) CAPITAL ADEQUACY. Without limiting the effect of the foregoing
      provisions of this Section 5.01 (but without duplication), the Borrowers
      shall pay directly to any Lender from time to time on request such amounts
      as such Lender may reasonably determine to be necessary to compensate such
      Lender or its parent or holding company for any costs which it determines
      are attributable to the maintenance by such Lender or its parent or
      holding company (or any Applicable Lending Office), pursuant to any
      Governmental Requirement

                                    -44-
<PAGE>
      following any Regulatory Change, of capital in respect of its Commitment,
      its Notes or its Loans, or any interest held by it in any Letter of
      Credit, such compensation to include, without limitation, an amount equal
      to any reduction of the rate of return on assets or equity of such Lender
      or its parent or holding company (or any Applicable Lending Office) to a
      level below that which such Lender or its parent or holding company (or
      any Applicable Lending Office) could have achieved but for such
      Governmental Requirement. Such Lender will notify the Borrowers that it is
      entitled to compensation pursuant to this Section 5.01(c) as promptly as
      practicable after it determines to request such compensation.

            (d) COMPENSATION PROCEDURE. Any Lender notifying the Borrowers of
      the incurrence of additional costs under this Section 5.01 shall in such
      notice to the Borrowers and the Agent set forth in reasonable detail the
      basis and amount of its request for compensation. Determinations and
      allocations by each Lender for purposes of this Section 5.01 of the effect
      of any Regulatory Change pursuant to Section 5.01(a) or (b), or of the
      effect of capital maintained pursuant to Section 5.01(c), on its costs or
      rate of return of maintaining Loans or its obligation to make Loans or
      issue Letters of Credit, or on amounts receivable by it in respect of
      Loans or Letters of Credit, and of the amounts required to compensate such
      Lender under this Section 5.01, shall be conclusive and binding for all
      purposes, provided that such determinations and allocations are made on a
      reasonable basis. No request for additional compensation under this
      Section 5.01 shall cover a period commencing earlier than 90 days prior to
      such request. Any request for additional compensation under this Section
      5.01 shall be paid by the Borrowers within thirty (30) days of the receipt
      by the Borrowers of the notice described in this Section 5.01(d).

            (e) REMOVAL OF LENDER. The Borrowers shall be entitled to remove any
      Lender under this Agreement if such Lender has requested any additional
      compensation under this Section 5.01 by giving the Agent and the Lenders
      at least ten (10) days prior written notice provided that a replacement
      bank assumes such Lender's Commitment and otherwise complies with the
      provisions of Section 12.06 hereof or the Commitments are reduced by a
      corresponding amount.

            Section 5.02 LIMITATION ON EURODOLLAR LOANS. Anything herein to the
contrary notwithstanding, if, on or prior to the determination of any Fixed
Eurodollar Rate for any Interest Period:

            (i) the Agent determines (which determination shall be conclusive,
      absent manifest error) that quotations of interest rates for the relevant
      deposits referred to in the definition of "Fixed Eurodollar Rate" in
      Section 1.02 are not being provided in the relevant amounts or for the
      relevant maturities for purposes of determining rates of interest for
      Eurodollar Loans as provided herein; or

                                    -45-
<PAGE>
            (ii) the Agent determines (which determination shall be conclusive,
      absent manifest error) that the relevant rates of interest referred to in
      the definition of "Fixed Eurodollar Rate" in Section 1.02 upon the basis
      of which the rate of interest for Eurodollar Loans for such Interest
      Period is to be determined are not sufficient to adequately cover the cost
      to the Lenders of making or maintaining Eurodollar Loans;

then the Agent shall give the Borrowers prompt notice thereof, and so long as
such condition remains in effect, the Lenders shall be under no obligation to
make additional Eurodollar Loans.

            Section 5.03 ILLEGALITY. Notwithstanding any other provision of this
Agreement, in the event that it becomes unlawful for any Lender or its
Applicable Lending Office to honor its obligation to make or maintain Eurodollar
Loans hereunder, then such Lender shall promptly notify the Borrowers thereof
and such Lender's obligation to make Eurodollar Loans shall be suspended until
such time as such Lender may again make and maintain Eurodollar Loans (in which
case the provisions of Section 5.04 shall be applicable).

            Section 5.04 BASE RATE LOANS PURSUANT TO SECTIONS 5.01, 5.02 AND
5.03. If the obligation of any Lender to make Eurodollar Loans shall be
suspended pursuant to Sections 5.01, 5.02 or 5.03 ("AFFECTED LOANS"), all
Affected Loans which would otherwise be made by such Lender shall be made
instead as Base Rate Loans (and, if an event referred to in Section 5.01(b) or
Section 5.03 has occurred and such Lender so requests by notice to the
Borrowers, all Affected Loans of such Lender then outstanding shall be
automatically converted into Base Rate Loans on the date specified by such
Lender in such notice) and, to the extent that Affected Loans are so made as (or
converted into) Base Rate Loans, all payments of principal which would otherwise
be applied to such Lender's Affected Loans shall be applied instead to its Base
Rate Loans.

            Section 5.05 COMPENSATION. The Borrowers shall pay to each Lender
within thirty (30) days of receipt of written request of such Lender (which
request shall set forth, in reasonable detail, the basis for requesting such
amounts and which shall be conclusive and binding for all purposes provided that
such determinations are made on a reasonable basis), such amount or amounts as
shall compensate it for any loss, cost, expense or liability which such Lender
determines in good faith are attributable to:

            (i) any payment, prepayment or conversion of a Eurodollar Loan
      properly made by such Lender or the Borrowers for any reason (including,
      without limitation, the acceleration of the Loans pursuant to Section
      10.01) on a date other than the last day of the Interest Period for such
      Loan; or

            (ii) any failure by the Borrowers for any reason (including but not
      limited to, the failure of any of the conditions precedent specified in
      Article VI to be

                                    -46-
<PAGE>
      satisfied) to borrow, continue or convert a Eurodollar Loan from such
      Lender on the date for such borrowing, continuation or conversion
      specified in the relevant notice given pursuant to Section 2.02(c).

Without limiting the effect of the preceding sentence, such compensation shall
include an amount equal to the excess, if any, of (i) the amount of interest at
the Fixed Rate for such Loan which would have accrued on the principal amount so
paid, prepaid or converted or not borrowed for the period from the date of such
payment, prepayment or conversion or failure to borrow to the last day of the
Interest Period for such Loan (or, in the case of a failure to borrow, the
Interest Period for such Loan which would have commenced on the date specified
for such borrowing) over (ii) the interest component of the amount such Lender
would have bid in the London interbank market for Dollar deposits of leading
banks in amounts comparable to such principal amount and with maturities
comparable to such period (as reasonably determined by such Lender). Any request
for compensation under this Section 5.05 shall be made within 90 days of the
event giving rise to such claim.

                                  ARTICLE VI

                             CONDITIONS PRECEDENT

            Section 6.01  INITIAL FUNDING.

            The obligation of the Lenders to make the Initial Funding is subject
to the receipt by the Agent and the Lenders of all fees payable pursuant to
Section 2.04 on or before the Closing Date and the receipt by the Agent of the
following documents and satisfaction of the other conditions provided in this
Section 6.01, each of which shall be satisfactory to the Agent in form and
substance:

            (a) Certificates of the Secretary or an Assistant Secretary of KOC
      and the Parent setting forth (i) resolutions of the boards of directors
      with respect to the authorization of each of the Borrowers to execute and
      deliver the Loan Documents to which it is a party and to enter into the
      transactions contemplated in those documents, (ii) the officers of KOC and
      the Parent (y) who are authorized to sign the Loan Documents to which a
      Borrower is a party and (z) who will, until replaced by another officer or
      officers duly authorized for that purpose, act as its representative for
      the purposes of signing documents and giving notices and other
      communications in connection with this Agreement and the transactions
      contemplated hereby, (iii) specimen signatures of the authorized officers,
      and (iv) the articles or certificate of incorporation and bylaws or
      Partnership Agreement, as applicable, of the Borrowers, certified as being
      true and complete. The Agent and the Lenders may

                                    -47-
<PAGE>
      conclusively rely on such certificates until the Agent receives notice in
      writing from the Borrowers to the contrary.

            (b) A certificate of the Secretary or an Assistant Secretary of each
      of the Guarantors or the Guarantors' general partner, as applicable,
      setting forth (i) resolutions of its board of directors with respect to
      the authorization of each of the Guarantor's to execute and deliver the
      Loan Documents to which it is a party and to enter into the transactions
      contemplated in those documents, (ii) the officers of the Guarantors or
      the Guarantors' general partner (y) who are authorized to sign the Loan
      Documents to which a Guarantor is a party and (z) who will, until replaced
      by another officer or officers duly authorized for that purpose, act as
      its representative for the purposes of signing documents and giving
      notices and other communications in connection with this Agreement and the
      transactions contemplated hereby, (iii) specimen signatures of the
      authorized officers, and (iv) the articles or certificate of incorporation
      and bylaws or Partnership Agreement, as applicable, of the Guarantors,
      certified as being true and complete. The Agent and the Lenders may
      conclusively rely on such certificate until they receive notice in writing
      from the Guarantor to the contrary.

            (c) Certificates of the appropriate state agencies with respect to
      the existence, qualification and good standing of the Obligors.

            (d) The Notes, duly completed and executed.

            (e) The Security Instruments, including those described on EXHIBIT
      D, duly completed and executed in sufficient number of counterparts for
      recording, if necessary.

            (f) Favorable opinions of Thomas E. Baker, general counsel of
      Parent, and local counsel opinions for the States of Alabama, Arkansas,
      Louisiana, New Mexico and Texas, in form and substance reasonably
      satisfactory to the Agent and the Lenders, as to such matters incident to
      the transactions herein contemplated as the Agent and the Lenders may
      reasonably require.

            (g) A certificate of insurance coverage of the Borrowers evidencing
      that the Borrowers are carrying insurance in accordance with Section 7.19
      hereof and certifying that such coverage is usual and customary for
      similar companies operating in the oil and gas business and complies with
      the requirements of the Loan Documents.

            (h) The Security Instruments and accompanying financing statements
      covering the Mortgaged Property shall have been properly executed and
      delivered to the Agent for

                                    -48-
<PAGE>
      subsequent filing and recording, as applicable, in the appropriate offices
      to establish and perfect the Liens and security interests created thereby.

            (i) The Agent shall have been furnished with appropriate UCC search
      certificates reflecting no prior liens or security interests except for
      liens being released with the proceeds of the Initial Funding or securing
      the Indebtedness.

            (j) Confirmation satisfactory to the Agent that the SCANA
      Acquisition shall be concurrently consummated.

            (k) The Contour Transaction shall have been consummated.

            (l) Such other documents as the Agent or any Lender or special
      counsel to the Agent may reasonably request.

            Section 6.02 INITIAL AND SUBSEQUENT LOANS AND LETTERS OF CREDIT. The
obligation of the Lenders to make Loans to the Borrowers upon the occasion of
each borrowing hereunder and to issue, renew, extend or reissue Letters of
Credit for the account of the Borrowers (including the Initial Funding) is
subject to the further conditions precedent that, as of the date of such Loans
and after giving effect thereto: (i) no Default shall have occurred and be
continuing; (ii) no Material Adverse Effect shall have occurred and be
continuing; and (iii) the representations and warranties made by the Obligors in
Article VII and in the Security Instruments shall be true on and as of the date
of the making of such Loans or issuance, renewal, extension or reissuance of a
Letter of Credit with the same force and effect as if made on and as of such
date and following such new borrowing, except to the extent such representations
and warranties are expressly limited to an earlier date or the Majority Lenders
may expressly consent in writing to the contrary. Each request for a borrowing
or issuance, renewal, extension or reissuance of a Letter of Credit by the
Borrowers hereunder shall constitute a certification by the Borrowers to the
effect set forth in the preceding sentence and a representation by the Borrowers
that such borrowing or issuance, renewal, extension or reissuance of a Letter of
Credit is permitted to be incurred under the Indenture (both as of the date of
such notice and, unless the Borrowers otherwise notify the Agent, prior to the
date of and immediately following such borrowing or issuance, renewal, extension
or reissuance of a Letter of Credit as of the date thereof).

            Section 6.03 CONDITIONS RELATING TO LETTERS OF CREDIT. In addition
to the satisfaction of all other conditions precedent set forth in this Article
VI, the issuance, renewal, extension or reissuance of the Letters of Credit
referred to in Section 2.01(c) hereof is subject to the following conditions
precedent:


                                    -49-
<PAGE>
            (a) At least three (3) Business Days prior to the date of the
      issuance and at least thirty (30) Business Days prior to the date of the
      renewal, extension or reissuance of each Letter of Credit, the Agent shall
      have received a written request for a Letter of Credit.

            (b) Each of the Letters of Credit shall (i) contain such terms and
      provisions as are reasonably required by the Issuing Bank (not
      inconsistent with the terms of this Agreement), (ii) be for the account of
      the Borrowers and (iii) expire not later than the earlier of (A) one year
      from the date of issuance, renewal, extension or reissuance or (B) five
      (5) days before the Revolving Credit Termination Date.

            (c) The Borrowers shall have duly and validly executed and delivered
      to the Issuing Bank a Letter of Credit Agreement pertaining to the Letter
      of Credit.

                                  ARTICLE VII

                        REPRESENTATIONS AND WARRANTIES

      Each of the Obligors represents and warrants to the Agent and the Lenders
that (each representation and warranty herein is given as of the Closing Date
and shall be deemed repeated and reaffirmed on the dates of each borrowing and
issuance, renewal, extension or reissuance of a Letter of Credit as provided in
Section 6.02):

            Section 7.01  EXISTENCE.

            (a) CORPORATE EXISTENCE. Each of KOC, Concorde and the Parent: (i)
      is a corporation duly organized, legally existing and in good standing
      under the laws of the jurisdiction of its incorporation; (ii) has all
      requisite corporate power, and has all material governmental licenses,
      authorizations, consents and approvals necessary to own its assets and
      carry on its business as now being or as proposed to be conducted; and
      (iii) is qualified to do business in all jurisdictions in which the nature
      of the business conducted by it makes such qualification necessary and
      where failure so to qualify would have a Material Adverse Effect.

            (b) PARTNERSHIP EXISTENCE. Each of Kelley Operating, 92 JV, 94 JV,
      92 DDP and 94 DDP: (i) is a partnership duly organized, legally existing
      and in good standing under the laws of the jurisdiction of its formation;
      (ii) has all requisite power, and has all material governmental licenses,
      authorizations, consents and approvals necessary to own its assets and
      carry on its business as now being or as proposed to be conducted; and
      (iii) is qualified to do business in all jurisdictions in

                                    -50-
<PAGE>
      which the nature of the business conducted by it makes such qualification
      necessary and where failure so to qualify would have a Material Adverse
      Effect.

            Section 7.02 FINANCIAL CONDITION. The unaudited consolidated balance
sheet of the Parent and its Consolidated Subsidiaries (including Unrestricted
Subsidiaries, if any) as at September 30, 1997 and the related consolidated
statements of income (or loss), and cash flows of the Borrower and its
Consolidated Subsidiaries (including Unrestricted Subsidiaries, if any) for the
nine month period ended on said date, have been prepared by the Parent pursuant
to the rules and regulations of the Securities and Exchange Commission in
accordance with GAAP for interim financial information, and such financial
statements reflect all adjustments (consisting of normal recurring adjustments)
necessary for a fair statement in all material respects of the results for the
interim periods presented. Neither the Parent nor any Subsidiary has on the
Closing Date any material Debt, contingent liabilities, liabilities for taxes,
unusual forward or long-term commitments or unrealized or anticipated losses
from any unfavorable commitments, except as referred to or reflected or provided
for in the Financial Statements or in SCHEDULE 7.02. Since December 31, 1996,
there has been no change or event having a Material Adverse Effect which is
continuing other than as shown on SCHEDULE 7.02. Each Obligor other than the
Parent is a Consolidated Subsidiary of the Parent.

            Section 7.03 LITIGATION. Except as disclosed to the Lenders in
SCHEDULE 7.03 hereto, at the Closing Date there is no litigation, legal,
administrative or arbitral proceeding, investigation or other action of any
nature pending or, to the knowledge of the Obligors threatened in writing
against or affecting the Obligors or any Subsidiary which involves the
possibility of any judgment or liability against the Obligors or any Subsidiary
not fully covered by insurance (except for normal deductibles), and which would
have a Material Adverse Effect.

            Section 7.04 NO BREACH. Neither the execution and delivery of the
Loan Documents nor compliance with the terms and provisions thereof will
conflict with or result in a breach of, or require any consent which has not
been obtained as of the Closing Date under, the respective charter or by-laws of
the Obligors or any Subsidiary, or any material Governmental Requirement or any
material agreement or instrument to which any Obligor or any Subsidiary is a
party or by which it is bound or to which it or its Properties are subject, or
constitute a default under any such material agreement or instrument, or result
in the creation or imposition of any Lien upon any of the revenues or assets of
the Obligors or any Subsidiary pursuant to the terms of any such material
agreement or instrument other than the Liens created by the Loan Documents.
Without limiting the foregoing, (i) the consummation of the transactions
contemplated by the Loan Documents will not constitute (A) a "Change of Control"
as defined in the indenture relating to the Parent's 13-1/2% Senior Unsecured
Notes due June 15, 1999 (the "13-1/2% INDENTURE"), (B) a "Change in Control" as
defined in the 1999 Notes Indenture or (C) a "Redemption Event" as defined in
the indenture relating to the 8-1/2% Convertible Subordinated Debentures of the
Parent due April 1, 2000 (the "8-1/2% INDENTURE"; and

                                    -51-
<PAGE>
together with the 13-1/2% Indenture and the 7-7/8% Indenture, the "PUBLIC
INDENTURES") and (ii) no default or event of default has occurred or is
continuing under any of the Public Indentures and no holder has the right to
require acceleration, redemption or repurchase (with or without notice or the
lapse of time, or both) of any indebtedness outstanding under any Public
Indenture. The transactions contemplated by the Loan Documents (including the
issuance of the shares to Contour pursuant to the Option Agreement) have been
approved by a majority of the board of directors of the Parent, and by reason of
such approval the consummation of the transactions contemplated by the Loan
Documents (including the immediate issuance to Contour pursuant to the Option
Agreement of shares) shall not constitute a "Redemption Event" as defined in the
8-1/2% Indenture.

            Section 7.05 AUTHORITY. Each Obligor and each Subsidiary has all
necessary power (corporate or otherwise) and authority to execute, deliver and
perform its obligations under the Loan Documents to which it is a party; and the
execution, delivery and performance by each Obligor and each Subsidiary of the
Loan Documents to which it is a party, have been duly authorized by all
necessary action (corporate or otherwise) on its part; and the Loan Documents
constitute the legal, valid and binding obligations of each Obligor and each
Subsidiary parties thereto, enforceable in accordance with their terms, except
as limited by bankruptcy, insolvency, or other laws of general application
relating to the enforcement of creditor's rights generally.

            Section 7.06 APPROVALS. Except as have already been obtained, filed
or made, as applicable, no authorizations, approvals or consents of, and no
filings or registrations with, any Governmental Authority are necessary for the
execution, delivery or performance by the Obligors or any Subsidiary of the Loan
Documents or for the validity or enforceability thereof, except for the
recording and filing of the Security Instruments as required by this Agreement.

            Section 7.07 USE OF LOANS. The proceeds of Revolving Credit Loans
shall be used to amend, extend and rearrange the Prior Debt of the Obligors and
for general business purposes of the Borrowers, including, without limitation,
the SCANA Acquisition; provided, however, the proceeds of the Revolving Credit
Loans shall not be used to redeem any of the 1999 Notes. The proceeds of the
Term Loans shall be used to redeem all or a portion of the 1999 Notes being
tendered for redemption as a result of the Change of Control (as defined in the
1999 Notes Indenture) caused by the Contour Transaction. None of the Obligors is
engaged principally, or as one of its important activities, in the business of
extending credit for the purpose, whether immediate, incidental or ultimate, of
buying or carrying margin stock (within the meaning of Regulation G, U or X of
the Board of Governors of the Federal Reserve System) and no part of the
proceeds of any Loan hereunder will be used to buy or carry any margin stock.


                                    -52-
<PAGE>
            Section 7.08  ERISA.

            (a) Each Obligor, each Subsidiary and each ERISA Affiliate has
      complied in all material respects with ERISA and, where applicable, the
      Code regarding each Plan.

            (b) Each Plan is, and has been, maintained in substantial compliance
      with ERISA and, where applicable, the Code.

            (c) No act, omission or transaction has occurred which could result
      in imposition on any of the Obligors, any Subsidiary or any ERISA
      Affiliate (whether directly or indirectly) of (i) either a civil penalty
      assessed pursuant to section 502(c), (i) or (l) of ERISA or a tax imposed
      pursuant to Chapter 43 of Subtitle D of the Code or (ii) breach of
      fiduciary duty liability damages under section 409 of ERISA.

            (d) No Plan (other than a defined contribution plan) or any trust
      created under any such Plan has been terminated since September 2, 1974.
      No liability to the PBGC (other than for the payment of current premiums
      which are not past due) by any of the Obligors, any Subsidiary or any
      ERISA Affiliate has been or is expected by any of the Obligors, any
      Subsidiary or any ERISA Affiliate to be incurred with respect to any Plan.
      No ERISA Event with respect to any Plan has occurred.

            (e) Full payment when due has been made of all amounts which any of
      the Obligors, any Subsidiary or any ERISA Affiliate is required under the
      terms of each Plan or applicable law to have paid as contributions to such
      Plan, and no accumulated funding deficiency (as defined in section 302 of
      ERISA and section 412 of the Code), whether or not waived, exists with
      respect to any Plan.

            (f) The actuarial present value of the benefit liabilities under
      each Plan which is subject to Title IV of ERISA does not, as of the end of
      each Obligor's most recently ended fiscal year, exceed the current value
      of the assets (computed on a plan termination basis in accordance with
      Title IV of ERISA) of such Plan allocable to such benefit liabilities. The
      term "actuarial present value of the benefit liabilities" shall have the
      meaning specified in section 4041 of ERISA.

            (g) None of the Obligors, any Subsidiary or any ERISA Affiliate
      sponsors, maintains, or contributes to an employee welfare benefit plan,
      as defined in section 3(1) of ERISA, including, without limitation, any
      such plan maintained to provide benefits to former employees of such
      entities, that may not be terminated by the Obligors, a Subsidiary or any
      ERISA Affiliate in its sole discretion at any time without any material
      liability.

                                    -53-
<PAGE>
            (h) None of the Obligors, any Subsidiary or any ERISA Affiliate
      sponsors, maintains or contributes to, or has at any time in the preceding
      six calendar years, sponsored, maintained or contributed to, any
      Multiemployer Plan.

            (i) None of the Obligors, any Subsidiary or any ERISA Affiliate is
      required to provide security under section 401(a)(29) of the Code due to a
      Plan amendment that results in an increase in current liability for the
      Plan.

            Section 7.09 TAXES. Except as set out in SCHEDULE 7.09, each Obligor
and its Subsidiaries has filed all United States Federal income tax returns and
all other tax returns which are required to be filed by them and have paid all
taxes due pursuant to such returns or pursuant to any assessment received by any
Obligor or any Subsidiary, except for any tax the payment of which is being
contested in good faith and by proper proceedings and against which adequate
reserves in the good faith judgment of the management of the Obligors are being
maintained. The charges, accruals and reserves on the books of each Obligor and
its Subsidiaries in respect of taxes and other governmental charges are, in the
opinion of each Obligor, adequate. No tax lien has been filed and, to the
knowledge of the Obligors, no claim is being asserted with respect to any such
tax, fee or other charge.

            Section 7.10  TITLE, ETC.

            (a) On the Closing Date and any other date prior to January 5, 1998
      on which the representations and warranties set forth in this Agreement
      shall be deemed repeated and reaffirmed, except as set out in SCHEDULE
      7.10, each of the Obligors and its Subsidiaries has good and defensible
      title to its material (individually or in the aggregate) Properties (other
      than the SCANA Properties), free and clear of all Liens, except Liens
      permitted by Section 9.02. On and after January 5, 1998, except as set out
      on replacement SCHEDULE 7.10, as required to be delivered pursuant to
      Section 8.12, each of the Obligors and its Subsidiaries has good and
      defensible title to its material (individually or in the aggregate)
      Properties, free and clear of all Liens, except Liens permitted by Section
      9.02. Except as set forth in SCHEDULE 7.10, after giving full effect to
      the Excepted Liens and such other Liens permitted by Section 9.02, each
      Borrower and JV owns the net interests in production attributable to the
      lands and leases reflected in the most recently delivered Reserve Report
      and the owner ship of such Properties shall not in any material respect
      obligate such Persons to bear the costs and expenses relating to the
      maintenance, development and operations of each such Property in an amount
      in excess of the working interest of each Property set forth in the most
      recently delivered Reserve Report. All information contained in the most
      recently delivered Reserve Report is true and correct in all material
      respects as of the date thereof to the knowledge of the Obligors. As of
      the Closing Date, KOC owns a 84.34% partnership interests in the 92 DDP
      and a 92.15% partnership interests in the 94 DDP.

                                    -54-
<PAGE>
            (b) All leases and agreements reasonably necessary for the conduct
      of the business of the Obligors and their Subsidiaries are valid and
      subsisting, in full force and effect and there exists no default or event
      or circumstance thereunder which with the giving of notice or the passage
      of time or both would give rise to a default under any such lease or
      leases, which would affect in any material respect the conduct of the
      business of the Obligors and their Subsidiaries.

            (c) The rights, properties and other assets presently owned, leased
      or licensed by the Obligors and their Subsidiaries including, without
      limitation, all easements and rights of way, include all rights,
      Properties and other assets reasonably necessary to permit the Obligors
      and their Subsidiaries to conduct their business in all material respects
      in the same manner as their business has been conducted prior to the
      Closing Date.

            (d) All of the assets and Properties of the Obligors and their
      Subsidiaries which are reasonably necessary for the operation of their
      business are in good working condition subject to normal wear and tear, as
      applicable, and are maintained in accordance with prudent business
      standards.

            Section 7.11 NO MATERIAL MISSTATEMENTS. No written information,
statement, exhibit, certificate, document or report furnished to the Agent and
the Lenders (or any of them) by the Obligors or any Subsidiary in connection
with the negotiation of this Agreement contained any material misstatement of
fact or omitted to state a material fact or any fact necessary to make the
statement contained therein not materially misleading in the light of the
circumstances in which made and with respect to the Obligors and their
Subsidiaries taken as a whole. As of the Closing Date, there is no fact peculiar
to the Obligors or any Subsidiary which has a Material Adverse Effect or in the
future is reasonably likely to have (so far as any Obligor can now foresee) a
Material Adverse Effect and which has not been set forth in this Agreement or
the other documents, certificates and statements furnished to the Agent by or on
behalf of the Obligors or any Subsidiary prior to, or on, the Closing Date in
connection with the transactions contemplated hereby.

            Section 7.12 INVESTMENT COMPANY ACT. None of the Obligors nor any
Subsidiary is an "investment company" or a company "controlled" by an
"investment company," within the meaning of the Investment Company Act of 1940,
as amended.

            Section 7.13 PUBLIC UTILITY HOLDING COMPANY ACT. None of the
Obligors nor any Subsidiary is a "holding company," or a "subsidiary company" of
a "holding company," or an "affiliate" of a "holding company" or of a
"subsidiary company" of a "holding company," or a "public utility" within the
meaning of the Public Utility Holding Company Act of 1935, as amended.


                                    -55-
<PAGE>
            Section 7.14 SUBSIDIARIES AND PARTNERSHIPS. Except as set forth on
SCHEDULE 7.14, as of the Closing Date the Obligors have no Subsidiaries nor
interests in any partnerships. SCHEDULE 7.14 sets forth as of the Closing Date
the complete corporate structure of the Parent and the Obligors. Except as
indicated on SCHEDULE 7.14, there exist no Unrestricted Subsidiaries. To the
extent any Unrestricted Subsidiaries are created or designated, the Obligors
shall promptly notify the Agent thereof, and the Agent will revise SCHEDULE 7.14
to reflect such new Unrestricted Subsidiary and distribute a copy thereof to
each of the parties to this Agreement. Upon distribution of such revised
SCHEDULE 7.14, such revised SCHEDULE 7.14 shall be deemed to be a part of this
Agreement in replacement of the existing SCHEDULE 7.14.

            Section 7.15 LOCATION OF BUSINESS AND OFFICES. Each Obligor's
principal place of business and chief executive offices as of the Closing Date
are located at the address stated below its signature on the signature pages of
this Agreement. The principal place of business and chief executive office of
each Subsidiary as of the Closing Date are located at the addresses stated on
SCHEDULE 7.14.

            Section 7.16 DEFAULTS. None of the Obligors nor any Subsidiary is in
default nor has any event or circumstance occurred which, but for the expiration
of any applicable grace period or the giving of notice, or both, would
constitute a default under any material agreement or instrument to which any
Obligor or any Subsidiary is a party or by which any Obligor or any Subsidiary
is bound which default would have a Material Adverse Effect. No Default
hereunder has occurred and is continuing.

            Section 7.17 ENVIRONMENTAL MATTERS. Except (i) as provided in
SCHEDULE 7.17 or (ii) as would not have a Material Adverse Effect (or with
respect to (c), (d) and (e) below, where the failure to take such actions would
not have a Material Adverse Effect):

            (a) Neither any Property of any Obligor or any Subsidiary nor the
      operations conducted thereon violate any Environmental Laws;

            (b) Without limitation of clause (a) above, no Property of any
      Obligor or any Subsidiary nor the operations currently conducted thereon
      or, to the best knowledge of any of the Obligors, by any prior owner or
      operator of such Property or operation, are in violation of or subject to
      any existing, pending or, to our knowledge, threatened action, suit,
      investigation, inquiry or proceeding by or before any Governmental
      Authority or to any remedial obligations under Environmental Laws;

            (c) All notices, permits, licenses or similar authorizations, if
      any, required pursuant to Environmental Laws to be obtained or filed in
      connection with the operation or use of the Property of any Obligor and
      each Subsidiary have been duly obtained or filed, and

                                    -56-
<PAGE>
      the Obligors and each Subsidiary are in compliance with the terms and
      conditions of all such notices, permits, licenses and similar
      authorizations;

            (d) All hazardous substances, solid waste, and oil and gas
      exploration and production wastes, if any, generated at the Property of
      any Obligor or any Subsidiary have in the past been transported, treated
      and disposed of in accordance with Environmental Laws and so as not to
      pose an imminent and substantial endangerment to public health or welfare
      or the environment, and, to the best knowledge of each Obligor, all such
      transport carriers and treatment and disposal facilities have been and are
      operating in compliance with Environmental Laws and so as not to pose an
      imminent and substantial endangerment to public health or welfare or the
      environment, and are not the subject of any existing, pending or, to our
      knowledge, threatened action, investigation or inquiry by any Governmental
      Authority in connection with any Environmental Laws;

            (e) The Obligors have taken all steps reasonably necessary to
      determine and have determined that no hazardous substances, solid waste,
      or oil and gas exploration and production wastes, have been disposed of or
      otherwise released and there has been no threatened release of any
      hazardous substances on or to any Property of the Obligors or any
      Subsidiary except, in each case, in compliance with Environmental Laws and
      so as not to pose an imminent and substantial endangerment to public
      health or welfare or the environment;

            (f) To the extent applicable, all Property of each Obligor and each
      Subsidiary currently satisfies all material design, operation, and
      equipment requirements imposed by the OPA or scheduled as of the Closing
      Date to be imposed by OPA during the term of this Agreement, and the
      Obligors do not have any reason to believe that such Property, to the
      extent subject to OPA, will not be able to maintain compliance with such
      OPA requirements during the term of this Agreement; and

            (g) None of the Obligors nor any Subsidiary has any known contingent
      liability in connection with any release or threatened release of any oil,
      hazardous substance or solid waste into the environment.

      On the Closing Date and any other date prior to January 5, 1998 on which
the representations and warranties set forth in this Agreement shall be deemed
repeated and reaffirmed, references in this Section 7.17 to (i) "Property" shall
not include the SCANA Properties and (ii) "SCHEDULE 7.17" shall mean the
SCHEDULE 7.17 delivered on the Closing Date. On and after January 5, 1998,
references in this Section 7.17 to (i) "Property" shall include the SCANA
Properties and (ii) "SCHEDULE 7.17" shall mean the replacement SCHEDULE 7.17
required to be delivered pursuant to Section 8.12.

                                    -57-
<PAGE>
            Section 7.18 COMPLIANCE WITH THE LAW. None of the Obligors nor any
Subsidiary has violated any Governmental Requirement or failed to obtain any
license, permit, franchise or other governmental authorization necessary for the
ownership of any of its Properties or the conduct of its business, which
violation or failure would have (in the event such violation or failure were
asserted by any Person through appropriate action) a Material Adverse Effect.
Except for such acts or failures to act as would not have a Material Adverse
Effect, the Oil and Gas Properties (and properties unitized therewith) have been
maintained, operated and developed in a good and workmanlike manner and in
conformity with all applicable laws and all rules, regulations and orders of all
duly constituted authorities having jurisdiction and in conformity with the
provisions of all leases, subleases or other contracts comprising a part of the
Hydrocarbon Interests and other contracts and agreements forming a part of the
Oil and Gas Properties; specifically in this connection, (i) after the Closing
Date, no Oil and Gas Property is subject to having allowable production reduced
below the full and regular allowable (including the maximum permissible
tolerance) because of any overproduction (whether or not the same was
permissible at the time) prior to the Closing Date and (ii) none of the wells
comprising a part of the Oil and Gas Properties (or properties unitized
therewith) are deviated from the vertical more than the maximum permitted by
applicable laws, regulations, rules and orders, and such wells are, in fact,
bottomed under and are producing from, and the well bores are wholly within, the
Oil and Gas Properties (or in the case of wells located on properties unitized
therewith, such unitized properties).

            Section 7.19 INSURANCE. As of the Closing Date, SCHEDULE 7.19
attached hereto contains an accurate and complete description of all material
policies of property damage, liability, workmen's compensation and other forms
of insurance owned or held by the Obligors and each Subsidiary. All such
policies are in full force and effect, all premiums with respect thereto
covering all periods up to and including the date of the closing have been paid,
and no notice of cancellation or termination has been received with respect to
any such policy. Such policies are sufficient for compliance with all
requirements of law and of all agreements to which the Obligors or any
Subsidiary is a party; are valid, outstanding and enforceable policies; provide
adequate insurance coverage in at least such amounts and against at least such
risks (but including in any event public liability) as are usually insured
against in the same general area by companies engaged in the same or a similar
business for the assets and operations of the Obligors and each Subsidiary; will
remain in full force and effect through the respective dates set forth in
SCHEDULE 7.19 without the payment of additional premiums; and will not in any
way be adversely affected by, or terminate or lapse by reason of, the
transactions contemplated by this Agreement. SCHEDULE 7.19 identifies all
material risks, if any, which the Obligors and its Subsidiaries and their
respective Board of Directors or officers have designated as being self insured.
None of the Obligors nor any Subsidiary has been refused any insurance with
respect to its assets or operations, nor has its coverage been limited below
usual and customary policy limits, by an insurance carrier to which it has
applied for any such insurance or with which it has carried insurance during the
last three years.

                                    -58-
<PAGE>
            Section 7.20 HEDGING AGREEMENTS. SCHEDULE 7.20 sets forth, as of a
date within four (4) Business Days of the Closing Date, a true and complete list
of all Hedging Agreements (including commodity price swap agreements, forward
agreements or contracts of sale which provide for prepayment for deferred
shipment or delivery of oil, gas or other commodities) of each Obligor and each
Subsidiary, the material terms thereof (including the type, term, effective
date, termination date and notional amounts or volumes), the net mark to market
value thereof, all credit support agreements relating thereto (including any
margin required or supplied), and the counterparty to each such agreement.

            Section 7.21 RESTRICTION ON LIENS. None of the Obligors nor any of
their Subsidiaries is a party to any agreement or arrangement (other than this
Agreement, the Indenture and the Security Instruments), or subject to any order,
judgment, writ or decree, which either restricts or purports to restrict its
ability to grant Liens to other Persons on or in respect of their respective
assets or Properties (other than assets represented by such agreements or
arrangement).

            Section 7.22 SOLVENCY. Each Obligor (i) is not insolvent as of the
date hereof and will not be rendered insolvent as a result of the Loan Document,
(ii) is not engaged in business or a transaction, or about to engage in a
business or a transaction, for which any property or assets remaining with such
Obligor is unreasonably small capital, and (iii) it does not intend to incur, or
believes it will incur, debts that will be beyond its ability to pay as such
debts mature.


                                 ARTICLE VIII

                             AFFIRMATIVE COVENANTS

      Each of the Obligors covenants and agrees that, so long as any of the
Commitments are in effect and until payment in full of all Loans hereunder, all
interest thereon and all other amounts payable by the Obligors hereunder:

            Section 8.01 FINANCIAL STATEMENTS. The Obligors shall deliver, or
shall cause to be delivered, to the Agent with sufficient copies of each for the
Lenders:

            (a) As soon as available and in any event within 90 days after the
      end of each fiscal year of the Parent, the audited consolidated statements
      of income, stockholders' equity, changes in financial position and cash
      flows of the Parent and its Consolidated Subsidiaries (including
      Unrestricted Subsidiaries) for such fiscal year, and the related
      consolidated balance sheets of the Parent and its Consolidated
      Subsidiaries (including Unrestricted Subsidiaries) as at the end of such
      fiscal year, setting forth (i) as to each account affected thereby, all
      eliminating entries for Unrestricted Subsidiaries as a group and (ii) the
      resulting

                                    -59-
<PAGE>
      consolidated figures for the Parent and the Restricted Subsidiaries, and
      setting forth in each case in comparative form the corresponding figures
      for the preceding fiscal year, and accompanied by the related opinion of
      independent public accountants of recognized national standing acceptable
      to the Agent which opinion shall state that said financial statements
      fairly present the consolidated financial condition and results of
      operations of the Parent and its Consolidated Subsidiaries (including
      Unrestricted Subsidiaries) as at the end of, and for, such fiscal year and
      that such financial statements have been prepared in accordance with GAAP
      except for such changes in such principles with which the independent
      public accountants shall have concurred and such opinion shall not contain
      a "going concern" or like qualification or exception, and a certificate of
      such accountants stating that, in making the examination necessary for
      their opinion, they obtained no knowledge, except as specifically stated,
      of any Default.

            (b) As soon as available and in any event within 45 days after the
      end of each of the first three fiscal quarterly periods of each fiscal
      year of the Parent, consolidated statements of income (or loss), changes
      in financial position and cash flows and consolidating statements of
      income of the Parent and its Consolidated Subsidiaries (including
      Unrestricted Subsidiaries) for such period and for the period from the
      beginning of the respective fiscal year to the end of such period, and the
      related consolidated and consolidating balance sheets as at the end of
      such period, setting forth (i) as to each account affected thereby, all
      eliminating entries for Unrestricted Subsidiaries as a group and (ii) the
      resulting consolidated and consolidating figures for the Parent and the
      Restricted Subsidiaries, and setting forth in each case in comparative
      form the corresponding figures for the corresponding period in the
      preceding fiscal year, accompanied by the certificate of a Responsible
      Officer, which certificate shall state that said financial statements
      fairly present the consolidated and consolidating financial condition and
      results of operations of the Parent and its Consolidated Subsidiaries
      (including Unrestricted Subsidiaries) in accor dance with GAAP, as at the
      end of, and for, such period (subject to normal year-end adjust ments).

            (c) Promptly after any of the Obligors knows that any Default or any
      Material Adverse Effect has occurred, a notice of such Default or Material
      Adverse Effect, describing the same in reasonable detail and the action
      the Obligors propose to take with respect thereto.

            (d) Promptly upon request by the Agent, a copy of each management
      letter submitted to any of the Obligors or any Subsidiary by independent
      accountants in connection with any annual, interim or special audit made
      by them of the books of the Obligors and its Subsidiaries, and a copy of
      any response by the Obligors or any Subsidiary of the Obligors, or the
      Board of Directors or general partner of any of the Obligors or any
      Subsidiary of the Obligors, to such management letter.

                                    -60-
<PAGE>
            (e) Promptly upon its becoming available, each financial statement,
      report, notice or proxy statement sent by any of the Obligors to
      stockholders, partners or unit-holders generally and each regular or
      periodic report and any registration statement, prospectus or written
      communication (other than transmittal letters) in respect thereof filed by
      any of the Obligors with or received by any of the Obligors in connection
      therewith from any securities exchange or the SEC or any successor agency.

            (f) Promptly after the furnishing thereof, copies of any statement,
      report or notice furnished to or any Person pursuant to the terms of any
      indenture, loan or credit or other similar agreement, other than this
      Agreement and not otherwise required to be furnished to the Lenders
      pursuant to any other provision of this Section 8.01.

            (g) At the time the January 1 Reserve Report is delivered to the
      Agent and the Lenders, the Obligors shall provide a one-year financial
      projection for the Parent and its Subsidiaries in form and substance
      acceptable to the Agent including projected revenues, expenses and capital
      expenditures.

            (h) From time to time such other information regarding the business,
      affairs or financial condition of any of the Obligors or any Subsidiary
      (including, without limitation, any Plan or Multiemployer Plan and any
      reports or other information required to be filed under ERISA) as any
      Lender or the Agent may reasonably request.

            (i) Concurrently with the delivery of the Financial Statements
      required by Section 8.01(a) and (b), a report, in form and substance
      satisfactory to the Agent, setting forth as of the last Business Day of
      such calendar quarter a true and complete list of all Hedging Agreements
      (including commodity price swap agreements, forward agreements or
      contracts of sale which provide for prepayment for deferred shipment or
      delivery of oil, gas or other commodities) of the Obligors and each
      Subsidiary, the material terms thereof (including the type, term,
      effective date, termination date and notional amounts or volumes), the net
      mark to market value therefor, any new credit support agreements relating
      thereto not listed on SCHEDULE 7.20, any margin required or supplied under
      any credit support document, and the counterparty to each such agreement.

The Obligors will furnish to the Agent, at the time each set of financial
statements is furnished pursuant to paragraph (a) or (b) above, a certificate
substantially in the form of EXHIBIT C hereto executed by a Responsible Officer
of each Obligor (i) certifying as to the matters set forth therein and stating
that no Default has occurred and is continuing (or, if any Default has occurred
and is continuing, describing the same in reasonable detail), and (ii) setting
forth in reasonable detail the computations necessary to determine whether the
Obligors are in compliance with Sections 9.12 and 9.13 as of the end of the
respective fiscal quarter or fiscal year.

                                    -61-
<PAGE>
            Section 8.02 LITIGATION. The Obligors shall promptly give to the
Agent notice of all legal or arbitral proceedings, and of all proceedings before
any Governmental Authority affecting the Obligors or any Subsidiary, except
proceedings which, if adversely determined, would not have a Material Adverse
Effect.

            Section 8.03  MAINTENANCE, ETC.

            (a) Each of the Obligors shall: preserve and maintain its corporate
      or partnership existence, as applicable (except as permitted by Section
      9.08), and all of its material rights, privileges and franchises; keep
      books of record and account in which full, true and correct entries will
      be made of all dealings or transactions in relation to its business and
      activities; comply with all Governmental Requirements if failure to comply
      with such requirements will have a Material Adverse Effect; pay and
      discharge all taxes, assessments and governmental charges or levies
      imposed on it or on its income or profits or on any of its Property prior
      to the date on which penalties attach thereto, except for any such tax,
      assessment, charge or levy the payment of which is being contested in good
      faith and by proper proceedings and against which adequate reserves in the
      good faith judgment of the management of Obligors are being maintained;
      upon reasonable notice, permit representa tives of the Agent or any
      Lender, during normal business hours, to examine, copy and make extracts
      from its books and records, to inspect its Properties, and to discuss its
      business and affairs with its officers, all to the extent reasonably
      requested by such Lender or the Agent (as the case may be); keep, or cause
      to be kept, insured by financially sound and reputable insurers all
      Property of a character usually insured by Persons engaged in the same or
      similar business similarly situated against loss or damage of the kinds
      and in the amounts customarily insured against by such Persons and carry
      such other insurance as is usually carried by such Persons including,
      without limitation, sudden and accidental seepage and pollution insurance
      to the extent reasonably available; and pay all of its accounts payable in
      the ordinary course of its business but not later than 120 days past the
      invoice or billing date, unless such payables are being contested in good
      faith by appropriate proceedings and if reserves adequate (in the good
      faith judgment of management of the Parent) under GAAP shall have been
      established therefor.

            (b) Contemporaneously with the delivery of the financial statements
      required by Section 8.01(a) to be delivered for each year, the Obligors
      will furnish or cause to be furnished to the Agent and the Lenders a
      certificate of insurance coverage from the insurer in form and substance
      satisfactory to the Agent and, if requested, will furnish the Agent and
      the Lenders copies of the applicable policies.

            (c) Each of the Obligors will and will cause each Subsidiary to, at
      its own expense, do or cause to be done all things reasonably necessary to
      preserve and keep in good

                                    -62-
<PAGE>
      repair, working order and efficiency in accordance with industry practice
      all of its Oil and Gas Properties and other material Properties including,
      without limitation, all equipment, machinery and facilities, and from time
      to time will make all the reasonably necessary repairs, renewals and
      replacements so that at all times the state and condition of its Oil and
      Gas Properties and other material Properties will be fully preserved and
      maintained in accordance with industry practice, except to the extent a
      portion of such Properties is no longer capable of producing Hydrocarbons
      in economically reasonable amounts. Each Obligor will and will cause each
      Subsidiary in accordance with industry practice to: (i) pay and discharge,
      or make reasonable and customary efforts to cause to be paid and
      discharged, all delay rentals, royalties, expenses and indebtedness
      accruing under the leases or other agreements affecting or pertaining to
      its Oil and Gas Properties, (ii) perform or make reasonable and customary
      efforts to cause to be performed, in accordance with industry standards,
      the obligations required by each and all of the assignments, deeds,
      leases, sub-leases, contracts and agreements affecting its interests in
      its Oil and Gas Properties and other material Properties, (iii) do and
      cause each Subsidiary to do all other things necessary to keep unimpaired,
      except for Liens described in Section 9.02, its rights with respect
      thereto and prevent any forfeiture thereof or a default thereunder, except
      to the extent a portion of such Properties is no longer capable of
      producing Hydrocarbons in economically reasonable amounts and except for
      dispositions permitted by Section 9.14 hereof. Each Obligor will and will
      cause each Subsidiary to operate its Oil and Gas Properties and other
      material Properties or cause or make reasonable and customary efforts to
      cause such Oil and Gas Properties and other material Properties to be
      operated in a careful and efficient manner in accordance with the
      practices of the industry and in compliance in all material respects with
      all applicable material contracts and agreements and in compliance in all
      material respects with all Governmental Requirements.

            Section 8.04  ENVIRONMENTAL MATTERS.

            (a) The Obligors will and will cause each Subsidiary to establish
      and implement such procedures as may be reasonably necessary to
      continuously determine and assure that any failure of the following does
      not have a Material Adverse Effect: (i) all Property of the Obligors and
      their Subsidiaries and the operations conducted thereon and other
      activities of the Obligors and their Subsidiaries are in compliance with
      and do not violate the requirements of any Environmental Laws, (ii) no
      oil, hazardous substances or solid wastes are disposed of or otherwise
      released on or to any Property owned by any such party except in
      compliance with Environmental Laws, (iii) no hazardous substance will be
      released on or to any such Property in a quantity equal to or exceeding
      that quantity which requires reporting pursuant to Section 103 of CERCLA,
      and (iv) no oil, oil and gas exploration and

                                    -63-
<PAGE>
      production wastes or hazardous substance is released on or to any such
      Property so as to pose an imminent and substantial endangerment to public
      health or welfare or the environment.

            (b) The Obligors will promptly notify the Agent and the Lenders in
      writing of any threatened action, investigation or inquiry by any
      Governmental Authority of which the Obligors have knowledge in connection
      with any Environmental Laws, excluding routine testing, corrective action
      and any action, investigation or inquiry which is not material.

            (c) The Obligors will and will cause each Subsidiary to provide
      environmental audits and tests in accordance with American Society of
      Testing and Materials standards as required to be obtained by the Agent or
      the Lenders by any Governmental Authority in connection with any future
      acquisitions of Oil and Gas Properties or other material Properties.

            Section 8.05 FURTHER ASSURANCES. The Obligors will and will cause
each Subsidiary to cure promptly any defects in the creation and issuance of the
Notes and the execution and delivery of the Security Instruments and this
Agreement upon the request of the Agent. The Obligors at their expense will and
will cause each Subsidiary to promptly execute and deliver to the Agent upon
request all such other documents, agreements and instruments to comply with or
accomplish the covenants and agreements of any of the Obligors or any
Subsidiary, as the case may be, in the Security Instruments and this Agreement,
or to further evidence and more fully describe the collateral intended as
security for the Notes, or to correct any omissions in the Security Instruments,
or to state more fully the security obligations set out herein or in any of the
Security Instruments, or to perfect, protect or preserve any Liens created
pursuant to any of the Security Instruments, or to make any recordings, to file
any notices or obtain any consents, all as may be necessary or appropriate in
connection therewith.

            Section 8.06 PERFORMANCE OF OBLIGATIONS. The Obligors will pay the
Notes according to the reading, tenor and effect thereof; and the Obligors will
and will cause each Subsidiary to do and perform every act and discharge all of
the obligations to be performed and discharged by them under the Loan Documents,
at the time or times and in the manner specified after taking into account any
applicable grace period.

            Section 8.07  RESERVE REPORTS.

            (a) Not later than March 31 of each year commencing March 31, 1998,
      the Borrowers shall furnish to the Agent and the Lenders a Reserve Report.
      The January 1 Reserve Report of each year shall (i) cover Oil and Gas
      properties comprising at least 90% of the total present value of the
      Obligors' Oil and Gas Properties at the time of preparation and (ii) be
      either (A) prepared by certified independent petroleum engineers or
      consultants

                                    -64-
<PAGE>
      acceptable to the Agent or (B) under the supervision of the chief engineer
      of the Borrowers and audited by H.J. Gruy & Associates, Inc. or other
      certified independent petroleum engineers or independent petroleum
      consultant(s) acceptable to the Agent. Not later than September 30 of each
      year, the Borrowers shall furnish to the Agent and the Lenders the July 1
      Reserve Report covering Oil and Gas properties comprising at least 90% of
      the total present value of the Obligors' Oil and Gas Properties at the
      time of preparation prepared by either (A) certified independent petroleum
      engineers or consultants acceptable to the Agent or (B) prepared by or
      under the supervision of the chief engineer of the Borrowers who shall
      certify such Reserve Report to be true and accurate to the best of his
      knowledge and to have been prepared in accordance with the procedures used
      in the immediately proceeding January 1 Reserve Report or which shall be
      audited by H.J. Gruy & Associates, Inc. or other certified independent
      petroleum engineers or independent petroleum consultant(s) acceptable to
      the Agent.

            (b) In the event of an unscheduled redetermination, the Borrowers
      shall furnish to the Agent and the Lenders a Reserve Report prepared by or
      under the supervision of the chief engineer of the Borrowers who shall
      certify such Reserve Report to be true and accurate to the best of his
      knowledge and to have been prepared in accordance with the procedures used
      in the immediately preceding Reserve Report. For any unscheduled
      redetermination requested by the Lenders pursuant to Section 2.08(d), the
      Borrowers shall provide such Reserve Report with an "as of" date as
      required by the Majority Lenders as soon as possible, but in any event no
      later than 45 days following the receipt of the request by the Agent.

            (c) With the delivery of each Reserve Report, the Borrowers shall
      provide to the Agent and the Lenders, a certificate from a Responsible
      Officer certifying that, to the best of his knowledge and in all material
      respects: (i) the information contained in the Reserve Report and any
      other information delivered in connection therewith is true and correct,
      (ii) except as set forth on an exhibit to the certificate, on a net basis
      there are no material gas imbalances, take or pay or other prepayments
      with respect to its Oil and Gas Properties evaluated in such Reserve
      Report which would require such Persons to deliver Hydrocarbons produced
      from such Oil and Gas Properties at some future time without then or
      thereafter receiving full payment therefor, (iii) none of their Oil and
      Gas Properties have been sold since the date of the last Borrowing Base
      determination, except as set forth on an exhibit to the certificate, which
      certificate shall list all of its Oil and Gas Properties sold (other than
      Hydrocarbons sold in the ordinary course of business) and in such detail
      as reasonably required by the Majority Lenders, and (iv) except as set
      forth on a schedule attached to the certificate, all of the Oil and Gas
      Properties evaluated by such Reserve Report are Mortgaged Property.

                                    -65-
<PAGE>
            Section 8.08  TITLE INFORMATION.

            (a) Within 30 days after the delivery to the Agent and the Lenders
      of each Reserve Report (including the Initial Reserve Report) required by
      Section 8.07(a), the Borrowers will deliver title information in form and
      substance acceptable to the Agent covering enough of the Oil and Gas
      Properties evaluated by such Reserve Report, so that the Agent shall have
      received together with title information previously delivered to the
      Agent, satisfactory title information on at least 50% of the value of the
      Oil and Gas Properties evaluated by such Reserve Report that are
      classified as proved undeveloped and 80% of the value of the Oil and Gas
      Properties evaluated by such Reserve Report that are classified as proved
      developed.

            (b) To the extent that Majority Lenders are not satisfied with title
      to any Property, such unacceptable Property shall not count towards the
      percentage requirements in Section 8.08(a), and the Agent may send a
      notice to the Borrowers and the Lenders that the then outstanding
      Threshold Amount shall be reduced by an amount as determined by all of the
      Lenders to cause the Borrowers to be in compliance with the requirement to
      provide acceptable title information on the required percentages of the
      value of the Oil and Gas Properties. This new Borrowing Base shall become
      effective immediately after receipt of such notice.

            (c) On or before January 30, 1998, the Agent shall have been
      furnished with appropriate UCC search certificates reflecting (i) the
      perfection of the Liens contemplated by the Security Instruments and (ii)
      no Liens or security interests other than Liens allowed pursuant to
      Section 9.02.

            Section 8.09  ADDITIONAL COLLATERAL.

            (a) Each Obligor shall cause all of its Oil and Gas Properties and
      other Properties included in the most recently delivered Reserve Report
      (except for Properties expressly excluded from the Borrowing Base
      redetermination by the Borrowers) at all times to be subject to a Lien as
      security for the Indebtedness; except for such Properties that, in the
      Agent's determination, the cost of perfecting a Lien in such Properties is
      disproportionate to the benefit of such collateral to the Lenders. Such
      Lien will be created and perfected by and in accordance with the
      provisions of deeds of trust, security agreements and financing
      statements, or other Security Instruments, all in form and substance
      satisfactory to the Agent in its sole discretion and in sufficient
      executed (and acknowledged where necessary or appropriate) counterparts
      for recording purposes.

                                    -66-
<PAGE>
            (b) Concurrently with the granting of the Lien or other action
      referred to in Section 8.07(a) above, the Obligors will provide to the
      Agent title information in form and substance satisfactory to the Agent in
      its sole discretion with respect to the Obligor's interests in such Oil
      and Gas Properties.

            (c) Also, promptly after the filing of any new Security Instrument
      in any state, upon the reasonable request of the Agent, the Obligors will
      provide to the Agent an opinion addressed to the Agent for the benefit of
      the Lenders in form and substance satisfactory to the Agent in its sole
      discretion from counsel acceptable to Agent, stating that the Security
      Instrument is valid, binding and enforceable in accordance with its terms
      and in legally sufficient form for such jurisdiction.

            Section 8.10 ERISA INFORMATION AND COMPLIANCE. The Obligors will
promptly furnish and will cause the Subsidiaries and any ERISA Affiliate to
promptly furnish to the Agent with sufficient copies to the Lenders (i) promptly
after the filing thereof with the United States Secretary of Labor, the Internal
Revenue Service or the PBGC, copies of each annual and other report with respect
to each Plan or any trust created thereunder, (ii) immediately upon becoming
aware of the occurrence of any ERISA Event or of any "prohibited transaction,"
as described in section 406 of ERISA or in section 4975 of the Code, in
connection with any Plan or any trust created thereunder, a written notice
signed by a Responsible Officer specifying the nature thereof, what action any
of the Obligors, the Subsidiary or the ERISA Affiliate is taking or proposes to
take with respect thereto, and, when known, any action taken or proposed by the
Internal Revenue Service, the Department of Labor or the PBGC with respect
thereto, and (iii) immediately upon receipt thereof, copies of any notice of the
PBGC's intention to terminate or to have a trustee appointed to administer any
Plan. With respect to each Plan (other than a Multiemployer Plan), the Obligors
will, and will cause each Subsidiary and ERISA Affiliate to, (i) satisfy in full
and in a timely manner, without incurring any late payment or underpayment
charge or penalty and without giving rise to any lien, all of the contribution
and funding requirements of section 412 of the Code (determined without regard
to subsections (d), (e), (f) and (k) thereof) and of section 302 of ERISA
(determined without regard to sections 303, 304 and 306 of ERISA), and (ii) pay,
or cause to be paid, to the PBGC in a timely manner, without incurring any late
payment or underpayment charge or penalty, all premiums required pursuant to
sections 4006 and 4007 of ERISA.

            Section 8.11RESTRICTED SUBSIDIARIES TO BE OBLIGORS. Concurrent with
the delivery of financial statements pursuant to Sections 8.01(a) and (b), the
Obligors will notify the Agent of each Restricted Subsidiary then existing that
has total net assets equal to or greater than $500,000. At any time after the
Agent has received notice pursuant to the preceding sentence, upon request of
the Agent, any such Restricted Subsidiary shall become a Guarantor under this
Agreement and shall promptly execute and deliver to the Agent a Guaranty
Agreement.

                                    -67-
<PAGE>
            Section 8.12 REVISED SCHEDULES. On or before January 5, 1998, the
Borrowers shall deliver to the Agent replacements for SCHEDULE 7.10 and SCHEDULE
7.17 setting forth exceptions to title and environmental matters, respectively,
as the Borrowers deem appropriate relating to the SCANA Properties.

            Section 8.13 CONSUMMATION OF HEDGING AGREEMENTS. On or before
December 29, 1997 the Borrowers shall consummate or cause to be consummated
Hedging Agreements acceptable to the Agent relating to at least 1,500,000,000
cubic feet of gas production per month of the Borrowers and Restricted
Subsidiaries, collectively, for May 1998 through October 1998.


                                  ARTICLE IX

                              NEGATIVE COVENANTS

      Each of the Obligors covenants and agrees that, so long as any of the
Commitments are in effect and until payment in full of Loans hereunder, all
interest thereon and all other amounts payable by the Obligors hereunder,
without the prior written consent of the Majority Lenders:

            Section 9.01  DEBT.  None of the Obligors nor any Subsidiary will 
incur, create, assume or suffer to exist any Debt, except:

            (a) the Notes or other Indebtedness or any guaranty of or suretyship
      arrangement for the Notes or other Indebtedness;

            (b) Debt of the Obligors and the Subsidiaries existing on the
      Closing Date which is disclosed in SCHEDULE 9.01, and any renewals or
      extensions (but not increases) thereof;

            (c) Debt associated with bonds or surety obligations required by
      Governmental Requirements in connection with the operation of the Oil and
      Gas Properties;

            (d) the Subordinated Debt, provided that only the Parent remains the
      sole obligor for such Debt;

            (e) add-on Debt to the Senior Subordinated Notes not to exceed
      $30,000,000 in the aggregate, upon terms no less favorable than the
      Indenture; provided that (i) the net cash proceeds from such add-on
      issuance are paid to the Agent for the benefit of the Lenders to reduce
      the amounts outstanding under the Notes and (ii) such add-on issuance
      occurs on or before May 31, 1998;

                                    -68-
<PAGE>
            (f) Hedging Agreements covering oil and gas production of the
      Obligors or any Subsidiary; provided, however, that (A) such Hedging
      Agreements related to oil or gas production shall not, either individually
      or in the aggregate, cover more than seventy-five percent (75%) of
      estimated production of oil or gas of the Obligors for each individual
      period covered by the Hedging Agreements and no such Hedging Agreement
      shall exceed a term of 24 months; PROVIDED, HOWEVER, such Hedging
      Agreements that are Basis Hedges may cover, either individually or in the
      aggregate, up to ninety percent (90%) of estimated production of oil or
      natural gas of the Obligors for each individual period covered by the
      Hedging Agreements and no such Hedging Agreement shall exceed a term of 24
      months, and (B) the Obligors may purchase "floors" to cover 100% of
      estimated oil and/or gas production;

            (g) Hedging Agreements entered into in the ordinary course of
      business for the purpose of hedging the Obligors' and the Subsidiaries'
      interest rate or currency exposure and not for the purpose of speculation;

            (h) Debt consisting of indemnities, obligations to make purchase
      price adjustments or other similar obligations, and guaranties in respect
      thereof, incurred or assumed in connection with the disposition of any
      assets of the Borrowers, the Obligors or any of their Subsidiaries;

            (i) Guaranties issued by the Borrowers, by the Obligors or by any of
      their respective Subsidiaries in the ordinary course of business of
      obligations of other Persons in connection with current oil and gas
      drilling, oil and gas production, oil and gas transportation, crude oil
      purchasing, oil and gas exploration or other similar programs or
      operations; provided that all such amounts guaranteed in the aggregate
      shall not exceed $750,000 outstanding at any one time;

            (j) Debt under capital leases (as required to be reported on the
      financial statements of the Obligors pursuant to GAAP), Debt under leases
      described in clause (v) of the definition of Debt, and other funded Debt
      (including purchase money debt), not to exceed $2,500,000 in the aggregate
      at any time outstanding for all such capital leases and other funded Debt;

            (k) Production payments, provided that (i) the net present value of
      the reserves related to such production payments does not exceed 30% of
      the total assets of the Obligors and (ii) no production payments owed by
      any Obligors burden any Properties which are included in the determination
      of the Borrowing Base and the Threshold Amount; and

                                    -69-
<PAGE>
            (l) Debt not to exceed $5,000,000 incurred in connection with the
      Section 29 Transaction.

            Section 9.02 LIENS. None of the Obligors nor any Subsidiary will
create, incur, assume or permit to exist any Lien on any of its Properties (now
owned or hereafter acquired), except:

            (a)   Liens securing the payment of any Indebtedness;

            (b)   Excepted Liens;

            (c) Liens securing leases or Debt allowed under Section 9.01(j) but
      only on the Property under lease or the purchase of which was financed
      with such Debt (or with Debt directly or indirectly refinanced by such
      Debt);

            (d)   Liens disclosed on SCHEDULE 9.02; and

            (e) Liens on cash or securities of the Obligors securing the Debt
      described in Section 9.01(c) or Section 9.01(f).

            Section 9.03 INVESTMENTS, LOANS AND ADVANCES. None of the Obligors
nor any Subsidiary will make or permit to remain outstanding any loans or
advances to or investments in any Person, except that the foregoing restriction
shall not apply to:

            (a) investments, loans or advances reflected in the Financial
      Statements or which are disclosed to the Lenders in SCHEDULE 9.03;

            (b) accounts receivable arising in the ordinary course of business;

            (c) direct obligations of the United States or any agency thereof,
      or obligations guaranteed by the United States or any agency thereof, in
      each case maturing within one year from the date of creation thereof;

            (d) commercial paper maturing within one year from the date of
      creation thereof rated no lower than A2 or P2, as such rating is set forth
      from time to time, by Standard & Poors or Moody's Investors Service, Inc.,
      respectively;

            (e) deposits maturing within one year from the date of creation
      thereof with, in cluding certificates of deposit issued by, any Lender or
      any office located in the United States of any other bank or trust company
      which is organized under the laws of the United

                                    -70-
<PAGE>
      States or any state thereof, has capital, surplus and undivided profits
      aggregating at least $100,000,000.00 (as of the date of such Lender's or
      bank or trust company's most recent financial reports) and has a short
      term deposit rating of no lower than A2 or P2, as such rating is set forth
      from time to time, by Standard & Poors or Moody's Investors Service, Inc.,
      respectively;

            (f) deposits in money market funds investing greater than 90% in
      investments described in Section 9.03(c), 9.03(d) or 9.03(e);

            (g) investments by the Borrowers in direct ownership interests in
      additional Oil and Gas Properties and gas gathering systems related
      thereto;

            (h) investments, loans or advances among the Obligors to be used for
      purposes not prohibited by this Agreement;

            (i)   Parent Stock Investments; and

            (j) other investments, loans or advances not to exceed $1,500,000 in
      the aggregate at any time.

            Section 9.04 DIVIDENDS, DISTRIBUTIONS AND REDEMPTIONS. The Obligors
will not declare or pay any dividend, purchase, redeem or otherwise acquire for
value any of its stock including, without limitation, common and preferred stock
now or hereafter outstanding, return any capital to its stockholders or make any
distribution of its assets to its stockholders, except that:

             (a)  the Parent may make stock dividends;

             (b) each Obligor (other than the Parent) and each Subsidiary
      (exclusive of the JV's and DDP's) may make distributions or pay dividends
      (other than in the case of a distribution or dividend to a Borrower)
      provided that no Borrowing Base deficiency exists and no Default or Event
      of Default exists or would result from such payment or distribution;

             (c)  each JV and DDP may make distributions;

             (d) the Parent may pay a one time dividend on its $2.625
      Convertible Exchangeable Preferred Stock of the Parent or, in lieu
      thereof, pay a fee or make a distribution to the shareholders of such
      $2.625 Convertible Exchangeable Preferred Stock, in either case, in an
      amount not to exceed $4,600,000 and to be paid on or before June 1, 1998,
      provided that, (i) no Default or Event of Default has occurred and is
      continuing (or would result therefrom), (ii) no Borrowing Base deficiency
      exists, (iii) such distribution or

                                    -71-
<PAGE>
      dividend is not prohibited under the Indenture (without the necessity of
      amending the Indenture or obtaining a waiver thereto to specifically allow
      for such distribution or dividend), (iv) the Term Loans have been paid in
      full and the Term Notes canceled and, (v) immediately following such
      distribution, the Threshold Utilization Percentage will not exceed 80%;
      and

            (e) any Obligor may make distributions or pay dividends to any
      Unrestricted Subsidiary, provided that, (i) no Default or Event of Default
      has occurred and is continuing (or would result therefrom), (ii) no
      Borrowing Base deficiency exists, and (iii) such distribution or dividend
      is not prohibited under the Indenture (without the necessity of amending
      the Indenture or obtaining a waiver thereto to specifically allow for such
      distribution or dividend).

            Section 9.05 SALES AND LEASEBACKS. None of the Obligors nor any
Subsidiary will enter into any arrangement, directly or indirectly, with any
Person whereby any of the Obligors or any Subsidiary shall sell or transfer any
of its Property, whether now owned or hereafter acquired, and whereby any of the
Obligors or any Subsidiary shall then or thereafter rent or lease as lessee such
Property or any part thereof or other Property which any of the Obligors or any
Subsidiary intends to use for substantially the same purpose or purposes as the
Property sold or transferred.

            Section 9.06 NATURE OF BUSINESS. None of the Obligors nor any
Subsidiary will allow any material change to be made in the character of its
business as carried on as of the Closing Date.

            Section 9.07 LIMITATION ON LEASES. Neither the Obligors nor any
Subsidiary will create, incur, assume or suffer to exist any obligation for the
payment of rent or hire of Property of any kind whatsoever (real or personal
leases but excluding capital leases and leases of Hydrocarbon Interests), under
leases or lease agreements which would cause the aggregate amount of all
payments made by the Obligors and its Subsidiaries pursuant to such leases or
lease agreements to exceed $1,750,000 in any fiscal year during the life of such
leases.

            Section 9.08 MERGERS, ETC. None of the Obligors nor any Subsidiary
will merge into or with or consolidate with any other Person, or sell, lease or
otherwise dispose of (whether in one transaction or in a series of transactions)
all or substantially all of its Property or assets to any other Person, except
that any Obligor or Subsidiary may merge with another Obligor or Subsidiary;
provided that (i) none of the Lenders are adversely affected by such merger,
(ii) no Default or Event of Default shall exist and be continuing immediately
before or after such merger, (iii) the Subordinated Debt and Senior Subordinated
Notes shall be subordinated to the Indebtedness after such merger, (iv) the Loan
Documents will be amended to reflect such merger in form satisfactory to the
Majority Lenders, and (v) such merger shall be permitted by the terms of the
indentures under which the Subordinated Debt and Senior Subordinated Notes were
issued.

                                    -72-
<PAGE>
            Section 9.09 PROCEEDS OF NOTES. The Obligors will not permit the
proceeds of the Notes to be used for any purpose other than those permitted by
Section 7.07. None of the Obligors nor any Person acting on behalf of any of the
Obligors has taken or will take any action which might cause any of the Loan
Documents to violate Regulation G, U or X or any other regulation of the Board
of Governors of the Federal Reserve System or to violate Section 7 of the
Securities Exchange Act of 1934 or any rule or regulation thereunder, in each
case as now in effect or as the same may hereinafter be in effect.

            Section 9.10 ERISA COMPLIANCE. The Obligors will not at any time:

            (a) Engage in, or permit any Subsidiary or ERISA Affiliate to engage
      in, any transaction in connection with which any of the Obligors, any
      Subsidiary or any ERISA Affiliate could be subjected to either a civil
      penalty assessed pursuant to section 502(c), (i) or (l) of ERISA or a tax
      imposed by Chapter 43 of Subtitle D of the Code;

            (b) Terminate, or permit any Subsidiary or ERISA Affiliate to
      terminate, any Plan in a manner, or take any other action with respect to
      any Plan, which could result in any liability to any of the Obligors, any
      Subsidiary or any ERISA Affiliate to the PBGC;

            (c) Fail to make, or permit any Subsidiary or ERISA Affiliate to
      fail to make, full payment when due of all amounts which, under the
      provisions of any Plan, agreement relating thereto or applicable law, any
      of the Obligors, a Subsidiary or any ERISA Affiliate is required to pay as
      contributions thereto;

            (d) Permit to exist, or allow any Subsidiary or ERISA Affiliate to
      permit to exist, any accumulated funding deficiency within the meaning of
      section 302 of ERISA or section 412 of the Code, whether or not waived,
      with respect to any Plan;

            (e) Permit, or allow any Subsidiary or ERISA Affiliate to permit,
      the actuarial present value of the benefit liabilities under any Plan
      maintained by any of the Obligors, any Subsidiary or any ERISA Affiliate
      which is regulated under Title IV of ERISA to exceed the current value of
      the assets (computed on a plan termination basis in accordance with Title
      IV of ERISA) of such Plan allocable to such benefit liabilities. The term
      "actuarial present value of the benefit liabilities" shall have the
      meaning specified in section 4041 of ERISA;

            (f) Contribute to or assume an obligation to contribute to, or
      permit any Subsidiary or ERISA Affiliate to contribute to or assume an
      obligation to contribute to, any Multiemployer Plan;

                                    -73-
<PAGE>
            (g) Acquire, or permit any Subsidiary or ERISA Affiliate to acquire,
      an interest in any Person that causes such Person to become an ERISA
      Affiliate with respect to any of the Obligors, any Subsidiary or any ERISA
      Affiliate if such Person sponsors, maintains or contributes to, or at any
      time in the six-year period preceding such acquisition has sponsored,
      maintained, or contributed to, (1) any Multiemployer Plan, or (2) any
      other Plan that is subject to Title IV of ERISA under which the actuarial
      present value of the benefit liabilities under such Plan exceeds the
      current value of the assets (computed on a plan termination basis in
      accordance with Title IV of ERISA) of such Plan allocable to such benefit
      liabilities;

            (h) Incur, or permit any Subsidiary or ERISA Affiliate to incur, a
      liability to or on account of a Plan under sections 515, 4062, 4063, 4064,
      4201 or 4204 of ERISA;

            (i) Contribute to or assume an obligation to contribute to, or
      permit any Subsidiary or ERISA Affiliate to contribute to or assume an
      obligation to contribute to, any employee welfare benefit plan, as defined
      in section 3(1) of ERISA, including, without limitation, any such plan
      maintained to provide benefits to former employees of such entities, that
      may not be terminated by such entities in their sole discretion at any
      time without any material liability; or

            (j) Amend or permit any Subsidiary or ERISA Affiliate to amend, a
      Plan resulting in an increase in current liability such that any of the
      Obligors, any Subsidiary or any ERISA Affiliate is required to provide
      security to such Plan under section 401(a)(29) of the Code.

            Section 9.11 SALE OR DISCOUNT OF RECEIVABLES. None of the Obligors
nor any Subsidiary will discount or sell (with or without recourse) any of its
notes receivable or accounts receivable.

            Section 9.12 RATIO OF TOTAL SENIOR FUNDED DEBT TO EBITDA. The Parent
and its Consolidated Subsidiaries will not permit their ratio of (i) Total
Funded Senior Debt as at the relevant fiscal quarter end to (ii) EBITDA for the
period of four (4) consecutive fiscal quarters ending on such date to be greater
than the ratio corresponding to the applicable fixed quarter ends set forth
below:

                                    -74-
<PAGE>
RATIO                            FISCAL QUARTER END
3.0 to 1.0               all fiscal quarter ends until and including
                         12/31/98
2.5 to 1.0               all fiscal quarter ends after 12/31/98
                         through and including 12/31/99
2.0 to 1.0               all fiscal quarter ends after 12/31/99


      "TOTAL SENIOR FUNDED DEBT" shall mean any Debt for borrowed money,
including without limitation, the Indebtedness, and any notes, bonds or
debentures issued by any Obligor unless such Debt is expressly subordinated to
the Indebtedness on terms satisfactory to the Lenders, PLUS capital leases.

            Section 9.13 INTEREST COVERAGE RATIO. The Parent will not permit its
Interest Coverage Ratio as of the end of any fiscal quarter of the Parent
(calculated quarterly at the end of each fiscal quarter) to be less than the
ratio corresponding to the applicable fiscal quarter ends set forth below:

                  RATIO             FISCAL QUARTER END

                  2.0 to 1.0        all fiscal quarter ends until and including 
                                    12/31/98

                  2.25 to 1.0       all fiscal quarter ends after 12/31/98 
                                    through and including 12/31/99

                  2.5 to 1.0        all fiscal quarter ends after 12/31/99

"INTEREST COVERAGE RATIO" shall mean the ratio of (i) EBITDA for the period of
four consecutive fiscal quarters ending on such date to (ii) cash interest
payments made for such four fiscal quarters of the Parent and its Consolidated
Subsidiaries.

            Section 9.14 SALE OF OIL AND GAS PROPERTIES. The Borrowers will not
sell, assign, farm-out, convey or otherwise transfer (a "TRANSFER") any Oil and
Gas Property or any interest in any Oil and Gas Property, except the Transfer of
(i) Hydrocarbons in the ordinary course of business, (ii) during each period
between Scheduled Redetermination Dates, Oil and Gas Properties having an
aggregate market value not exceeding 10% of the Threshold Amount then in effect
and, upon the Borrowers' written request and upon the application of proceeds
for any prepayments required by Section 2.07(d), the Agent will release its
Liens covering any interests in Oil and Gas Properties

                                    -75-
<PAGE>
included in such Transfer, and (iii) Oil and Gas Properties which are (a) not
included in the most recent Reserve Report, (b) not reasonably expected by
Borrowers to be included in the next Reserve Report required by Section 8.07,
and (c) located outside of the Sibley, Sailes, West Bryceland and Ada fields in
north Louisiana and, upon the Borrowers' written request, the Agent will release
its Liens, if any, covering any interest in Oil and Gas Properties included in
such Transfer, provided that, the cash proceeds received by the Borrowers from
such Transfer are paid to the Agent for the benefit of the Lenders to reduce the
amount outstanding under the Revolving Credit Notes.

            Section 9.15 ENVIRONMENTAL MATTERS. None of the Obligors nor any
Subsidiary will cause or permit any of its Property to be in violation of, or do
anything or permit anything to be done which will subject any such Property to
any remedial obligations under any Environmental Laws, assuming disclosure to
the applicable Governmental Authority of all relevant facts, conditions and
circumstances, if any, pertaining to such Property where such violations or
remedial obligations would have a Material Adverse Effect.

            Section 9.16 TRANSACTIONS WITH AFFILIATES. None of the Obligors nor
any Subsidiary will enter into any transaction, including, without limitation,
any purchase, sale, lease or exchange of Property or the rendering of any
service, with any Affiliate unless such transactions are otherwise permitted
under this Agreement, are in the ordinary course of its business and are upon
fair and reasonable terms no less favorable to it than it would obtain in a
comparable arm's length transaction with a Person not an Affiliate. The
foregoing restrictions shall not apply to transactions with Bessemer and its
Affiliates set forth in SCHEDULE 9.16; provided that no cash or other Property
(other than securities of the Parent) shall be paid by any Obligor or any
Subsidiary to Bessemer or any of its Affiliates in connection with such
transactions during the continuation of an Event of Default.

            Section 9.17 SUBSIDIARIES AND PARTNERSHIPS. The Obligors shall not,
and shall not permit any Subsidiary to, create any additional Subsidiaries or
partnerships, except for (i) the Subsidiary created in connection with the
Section 29 Transaction, (ii) Subsidiaries created to hold assets obtained
through Parent Stock Investments, and (iii) Unrestricted Subsidiaries
capitalized with funds permitted by Section 9.03(j). The Obligors shall not and
shall not permit any Subsidiary to sell any stock of a Subsidiary or any
interest in a partnership. The Obligors shall not permit any Subsidiary to issue
any stock except to the Obligors and except in compliance with Section 9.03.

            Section 9.18 NEGATIVE PLEDGE AGREEMENTS. None of the Obligors nor
any Subsidiary will create, incur, assume or suffer to exist any agreement or
arrangement (other than this Agreement, the Indenture and the Security
Instruments) which in any way prohibits or restricts the granting, conveying,
creation or imposition of any Lien on any of its Property (other than Property
represented by such agreement or arrangement) or restricts any Subsidiary from
paying dividends to the Obligors, or which requires the consent of or notice to
other Persons in connection therewith.

                                    -76-
<PAGE>
            Section 9.19 PARTNERSHIP AGREEMENT. The Obligors will not amend or
permit to be amended the Partnership Agreements in any way which would
materially adversely effect the Lenders, without the prior written consent of
the Majority Lenders.

            Section 9.20  SUBORDINATED DEBT AND SENIOR SUBORDINATED NOTES.

            (a) The Parent will not (i) amend, supplement or modify the
      Subordinated Debt, the Senior Subordinated Notes or the indentures under
      which such Debt was issued or (ii) accept any waivers in connection with
      any defaults under such instruments or Debt without the written consent of
      the Lenders, unless such amendments, supplements, modifications or waivers
      do not, individually or in the aggregate, materially and adversely affect
      the Lenders.

            (b) The Parent will not exercise its right to exchange its $2.625
      Convertible Exchangeable Preferred Stock into 10 1/2% Convertible
      Subordinated Debentures due
      April 30, 2004.

            (c) The Parent will not prepay, purchase, repurchase, redeem,
      defease or covenant defease the Subordinated Debt or the Senior
      Subordinated Notes or the indentures under which such Debt was issued,
      except (i) in shares of the Parent's stock, (ii) if no Default or Event of
      Default exists or would result therefrom, prior to October 15, 1999 the
      Parent may redeem in the aggregate up to 35% of the original principal
      amount of the Senior Subordinated Notes with the proceeds of one or more
      equity offerings pursuant to the terms of the Indenture, and (iii) if (A)
      no Default or Event of Default exists, (B) no Borrowing Base deficiency
      exists, and (C) only proceeds from the Term Loans are used for prepayment,
      the Parent may prepay the 1999 Notes that are tendered for redemption as a
      result of the Change in Control (as defined in the 1999 Notes Indenture)
      caused by the Contour Transaction.

            Section 9.21 GAS IMBALANCES. None of the Obligors will incur or
allow to exist, as at the end of any fiscal quarter, gas imbalances, take or pay
or other prepayments with respect to any Obligor's Oil and Gas Properties which
would require an Obligor to deliver Hydrocarbons produced from its Oil and Gas
Properties at some future time without then or thereafter receiving full payment
therefor exceeding 1.5 billion cubic feet of gas in the aggregate for all
Obligors.

                                    -77-
<PAGE>
                                   ARTICLE X

                          EVENTS OF DEFAULT; REMEDIES

            Section 10.01  EVENTS OF DEFAULT.  One or more of the following 
events shall constitute an "EVENT OF DEFAULT":

            (a) the Borrowers shall (i) default in the payment or prepayment
      when due of any principal of any Loan, or (ii) default, and such default
      shall continue for five or more days, in the payment when due of any
      reimbursement obligation for a disbursement made under any Letter of
      Credit, any interest or any fees or other amount payable by them hereunder
      or under any Loan Document; or

            (b) any of the Obligors or any Subsidiary shall default in the
      payment when due of any principal of or interest on any of its other Debt
      aggregating $1,000,000 or more, or any event specified in any note,
      agreement, indenture or other document evidencing or relating to any such
      Debt shall occur if the effect of such event is to cause or to permit the
      holder or holders of such Debt (or a trustee or agent on behalf of such
      holder or holders) to cause, such Debt to become due or to be redeemed or
      repurchased prior to its stated maturity; or

            (c) any representation, warranty or certification made or deemed
      made herein or in any Security Instrument by any of the Obligors or any
      Subsidiary, or any certificate furnished to any Lender or the Agent
      pursuant to the provisions hereof or any Security Instrument, shall prove
      to have been false or misleading as of the time made or furnished in any
      material and adverse respect; or

            (d) the Obligors shall default in the performance of any of their
      obligations under Article IX (other than Sections 9.10 and 9.15), 8.13, or
      any other Article of this Agreement other than under Article VIII
      (excluding Section 8.13); or the Obligors shall default in the performance
      of any of their obligations under Article VIII (excluding Section 8.13),
      Sections 9.10 and 9.15 or any Security Instrument (other than the payment
      of amounts due which shall be governed by Section 10.01(a)) and such
      default shall continue unremedied for a period of thirty (30) days (five
      (5) days for defaults under Sections 9.10 and 9.15) after the earlier to
      occur of (i) notice thereof to the Obligors by the Agent or any Lender
      (through the Agent), or (ii) the Obligors otherwise becoming aware of such
      default; or

            (e) any of the Obligors shall admit in writing its inability to, or
      be generally unable to, pay its Debts as such Debts become due; or

                                    -78-
<PAGE>
            (f) any of the Obligors shall (i) apply for or consent to the
      appointment of, or the taking of possession by, a receiver, custodian,
      trustee or liquidator of itself or of all or a substantial part of its
      property, (ii) make a general assignment for the benefit of its creditors,
      (iii) commence a voluntary case under the Federal Bankruptcy Code (as now
      or hereafter in effect), (iv) file a petition seeking to take advantage of
      any other law relating to bankruptcy, insolvency, reorganization,
      winding-up, or composition or readjustment of debts, (v) fail to
      controvert in a timely and appropriate manner, or acquiesce in writing to,
      any petition filed against it in an involuntary case under the Federal
      Bankruptcy Code, or (vi) take any corporate or partnership action for the
      purpose of effecting any of the foregoing; or

            (g) a proceeding or case shall be commenced, without the application
      or consent of any of the Obligors, in any court of competent jurisdiction,
      seeking (i) the liquidation, reorganization, dissolution or winding-up of
      such Obligor, or the composition or readjustment of its debts, (ii) the
      appointment of a trustee, receiver, custodian, liquidator or the like of
      such Obligor of all or any substantial part of its assets, or (iii)
      similar relief in respect of such Obligor under any law relating to
      bankruptcy, insolvency, reorganization, winding-up, or composition or
      adjustment of debts, and such proceeding or case shall continue
      undismissed, or an order, judgment or decree approving or ordering any of
      the foregoing shall be entered and continue unstayed and in effect, for a
      period of 60 days; or (iv) an order for relief against such Obligor shall
      be entered in an involuntary case under the Federal Bankruptcy Code; or

            (h) a judgment or judgments for the payment of money in excess of
      $100,000 in the aggregate shall be rendered by a court against any of the
      Obligors or any Subsidiary and the same shall not be discharged (or
      provision shall not be made for such discharge), or a stay of execution
      thereof shall not be procured, within thirty (30) days from the date of
      entry thereof and such Obligor or such Subsidiary shall not, within said
      period of 30 days, or such longer period during which execution of the
      same shall have been stayed, appeal therefrom and cause the execution
      thereof to be stayed during such appeal; or

            (i) the Security Instruments after delivery thereof shall for any
      reason, except to the extent permitted by the terms thereof, cease to be
      in full force and effect and valid, binding and enforceable in accordance
      with their terms, or cease to create a valid and perfected Lien of the
      priority required thereby on any of the collateral purported to be covered
      thereby, except to the extent permitted by the terms of this Agreement or
      resulting from any act or omission by the Agent, or any of the Obligors
      shall so state in writing; or

            (j)   a Change of Control shall occur; or

                                    -79-
<PAGE>
            (k) the occurrence of any event which requires mandatory prepayment
      or repurchase, in whole or in part, of the Senior Subordinated Notes or
      the Subordinated Debt, excluding any redemptions of the 1999 Notes
      resulting from the Change in Control (as defined in the 1999 Notes
      Indenture) caused by the Contour Transaction.

            Section 10.02  REMEDIES.

            (a) In the case of an Event of Default other than one referred to in
      clauses (e), (f) or (g) of Section 10.01, the Agent may and, upon request
      of the Majority Lenders, shall, by notice to the Borrowers, cancel the
      Commitments and/or declare the principal amount then outstanding of, and
      the accrued interest on, the Loans and all other amounts payable by the
      Borrowers hereunder and under the Notes (including without limitation the
      payment of cash collateral to secure the LC Exposure as provided in
      Section 2.10(b)) to be forthwith due and payable, whereupon such amounts
      shall be immediately due and payable without presentment, demand, protest,
      notice of intent to accelerate, notice of acceleration or other
      formalities of any kind, all of which are hereby expressly waived by the
      Borrowers.

            (b) In the case of the occurrence of an Event of Default referred to
      in clauses (e), (f) or (g) of Section 10.01, the Commitments shall be
      automatically canceled and the principal amount then outstanding of, and
      the accrued interest on, the Loans and all other amounts payable by the
      Borrowers hereunder and under the Notes (including without limitation the
      payment of cash collateral to secure the LC Exposure as provided in
      Section 2.10(b) hereof) shall become automatically immediately due and
      payable without presentment, demand, protest, notice of intent to
      accelerate, notice of acceleration or other formalities of any kind, all
      of which are hereby expressly waived by the Borrowers.

            (c) Except for any Minority Proceeds, all proceeds received after
      maturity of the Notes, whether by acceleration or otherwise, and all
      proceeds received from the exercise of any remedies after the occurrence
      and during the continuance of an Event of Default shall be applied first
      to reimbursement of expenses and indemnities provided for in this
      Agreement and the Security Instruments; second to accrued interest on the
      Notes; third to fees; fourth pro rata to principal outstanding on the
      Notes and other Indebtedness; fifth to serve as cash collateral to be held
      by the Agent to secure the LC Exposure; and any excess shall be paid to
      the Borrowers or as otherwise required by any Governmental Requirement.

            (d) "MINORITY PROCEEDS" shall mean the amount of proceeds from time
      to time equal to the Minority Percentage of any proceeds received by the
      Agent or any Lender from the Mortgaged Property owned by either 92 JV or
      94 JV by exercise of any rights or remedies under the Security Instruments
      after the Allocable Indebtedness of 92 JV or 94 JV, as applicable, has
      been paid in full. The Minority Proceeds shall not be applied as provided
      in

                                    -80-
<PAGE>
      Section 10.02(c) but shall be paid to 92 JV or 94 JV, as the case may be
      to the extent of the ownership of such proceeds, or as otherwise required
      by any Governmental Requirement. Unless KOC provides the Agent with a
      determination of how much of any proceeds are Minority Proceeds in such
      detail as reasonably required by the Agent on or before the receipt of
      such proceeds, the Agent may apply all such proceeds as provided in
      Section 10.02(c). In addition to such other information reasonably
      requested by the Agent, KOC must provide the detail of the ownership of
      such proceeds including the ownership of the underlying Oil and Gas
      Property and the then current Allocable Indebtedness and Minority
      Percentage for each of 92 JV and 94 JV. The Lenders will return any
      Minority Proceeds received by any of them, if they are notified by the
      Borrowers promptly after the Borrowers determine that Minority Proceeds
      have been paid to the Lenders and if the other information required by
      this Section 10.02(d) has been provided as required hereby. "DDP'S SHARE"
      shall mean for 92 JV or 94 JV the percentage required to be distributed at
      that time by the 92 JV to the 92 DDP or by the 94 JV to the 94 DDP,
      respectively. "MINORITY PERCENTAGE" shall mean for 92 JV or 94 JV the
      product of the DDP's Share times the percentage required to be distributed
      at that time by the 92 DDP or 94 DDP Partnership Agreement, as applicable,
      to partners of 92 DDP or 94 DDP, respectively, that are not an Obligor or
      an Affiliate of an Obligor. "ALLOCABLE INDEBTEDNESS" shall mean for 92 JV
      or 94 JV the amount of the outstanding Indebtedness or Prior Debt the
      proceeds of which were advanced by a Borrower to or used by a Borrower to
      pay Debt of, 92 JV or 94 JV, as the case may be.


                                  ARTICLE XI

                                   THE AGENT

            Section 11.01 APPOINTMENT, POWERS AND IMMUNITIES. Each Lender hereby
irrevocably appoints and authorizes the Agent to act as its agent hereunder and
under the Security Instruments with such powers as are specifically delegated to
the Agent by the terms of this Agreement and the Security Instruments, together
with such other powers as are reasonably incidental thereto. The Agent (which
term as used in this sentence and in Section 11.05 and the first sentence of
Section 11.06 shall include reference to its Affiliates and its and its
Affiliates' officers, directors, employees, attorneys, accountants, experts and
agents): (i) shall have no duties or responsibilities except those expressly set
forth in this Agreement, and shall not by reason of this Agreement be a trustee
or fiduciary for any Lender; (ii) makes no representation or warranty to any
Lender and shall not be responsible to the Lenders for any recitals, statements,
representations or warranties contained in this Agreement, or in any certificate
or other document referred to or provided for in, or received by any of them
under, this Agreement, or for the value, validity, effectiveness, genuineness,
execution, legality, enforceability or sufficiency of this Agreement, any Note
or any other document referred to or provided for herein or for any failure by
the Obligors or

                                    -81-
<PAGE>
any other Person (other than the Agent) to perform any of its obligations
hereunder or thereunder or for the existence, value, perfection or priority of
any collateral security or the financial or other condition of the Obligors, its
Subsidiaries or any other obligor or guarantor; (iii) except pursuant to Section
11.07 shall not be required to initiate or conduct any litigation or collection
proceedings hereunder; and (iv) shall not be responsible for any action taken or
omitted to be taken by it hereunder or under any other document or instrument
referred to or provided for herein or in connection herewith including its own
ordinary negligence, except for its own gross negligence or willful misconduct.
The Agent may employ agents, accountants, attorneys and experts and shall not be
responsible for the negligence or misconduct of any such agents, accountants,
attorneys or experts selected by it in good faith or any action taken or omitted
to be taken in good faith by it in accordance with the advice of such agents,
accountants, attorneys or experts. The Agent may deem and treat the payee of any
Note as the holder thereof for all purposes hereof unless and until a written
notice of the assignment or transfer thereof permitted hereunder shall have been
filed with the Agent.

            Section 11.02 RELIANCE BY AGENT. The Agent shall be entitled to rely
upon any certification, notice or other communication (including any thereof by
telephone, telex, telecopier, telegram or cable) believed by it to be genuine
and correct and to have been signed or sent by or on behalf of the proper Person
or Persons, and upon advice and statements of legal counsel, independent
accountants and other experts selected by the Agent.

            Section 11.03 DEFAULTS. The Agent shall not be deemed to have
knowledge of the occurrence of a Default (other than the non-payment of
principal of or interest on Loans or of fees or failure to reimburse for Letter
of Credit drawings) unless the Agent has received notice from a Lender or the
Borrowers specifying such Default and stating that such notice is a "Notice of
Default." In the event that the Agent receives such a notice of the occurrence
of a Default, the Agent shall give prompt notice thereof to the Lenders. In the
event of a payment Default, the Agent shall give each Lender prompt notice of
each such payment Default.

            Section 11.04 RIGHTS AS A LENDER. With respect to its Commitments
and the Loans made by it and its participation in the issuance of Letters of
Credit, TCB (and any successor acting as Agent) in its capacity as a Lender
hereunder shall have the same rights and powers hereunder as any other Lender
and may exercise the same as though it were not acting as the Agent, and the
term "Lender" or "Lenders" shall, unless the context otherwise indicates,
include the Agent in its individual capacity. TCB (and any successor acting as
Agent) and its Affiliates may (without having to account therefor to any Lender)
accept deposits from, lend money to and generally engage in any kind of banking,
trust or other business with the Obligors (and any of its Affiliates) as if it
were not acting as the Agent, and TCB and its Affiliates may accept fees and
other consideration from the Obligors for services in connection with this
Agreement or otherwise without having to account for the same to the Lenders.

                                    -82-
<PAGE>
            Section 11.05 INDEMNIFICATION. THE LENDERS AGREE TO INDEMNIFY THE
AGENT AND THE ISSUING BANK RATABLY IN ACCORDANCE WITH THEIR PERCENTAGE SHARES
FOR THE INDEMNITY MATTERS AS DESCRIBED IN SECTION 12.03 TO THE EXTENT NOT
INDEMNIFIED OR REIMBURSED BY THE BORROWERS UNDER SECTION 12.03, BUT WITHOUT
LIMITING THE OBLIGATIONS OF THE BORROWERS UNDER SAID SECTION 12.03 AND FOR ANY
AND ALL OTHER LIABILITIES, OBLIGATIONS, LOSSES, DAMAGES, PENALTIES, ACTIONS,
JUDGMENTS, SUITS, COSTS, EXPENSES OR DISBURSEMENTS OF ANY KIND AND NATURE
WHATSOEVER WHICH MAY BE IMPOSED ON, INCURRED BY OR ASSERTED AGAINST THE AGENT OR
THE ISSUING BANK IN ANY WAY RELATING TO OR ARISING OUT OF: (I) THIS AGREEMENT,
THE SECURITY INSTRUMENTS OR ANY OTHER DOCUMENTS CONTEMPLATED BY OR REFERRED TO
HEREIN OR THE TRANSACTIONS CONTEMPLATED HEREBY, BUT EXCLUDING, UNLESS A DEFAULT
HAS OCCURRED AND IS CONTINUING, NORMAL ADMINISTRATIVE COSTS AND EXPENSES
INCIDENT TO THE PERFORMANCE OF ITS AGENCY DUTIES HEREUNDER OR (II) THE
ENFORCEMENT OF ANY OF THE TERMS OF THIS AGREEMENT, ANY SECURITY INSTRUMENT OR OF
ANY SUCH OTHER DOCUMENTS; WHETHER OR NOT ANY OF THE FOREGOING SPECIFIED IN THIS
SECTION 11.05 ARISES FROM THE SOLE OR CONCURRENT NEGLIGENCE OF THE AGENT OR THE
ISSUING BANK, PROVIDED THAT NO LENDER SHALL BE LIABLE FOR ANY OF THE FOREGOING
TO THE EXTENT THEY ARISE FROM THE GROSS NEGLIGENCE OR WILLFUL MISCONDUCT OF THE
PARTY TO BE INDEMNIFIED.

            Section 11.06 NON-RELIANCE ON AGENT AND OTHER LENDERS. Each Lender
acknowledges and agrees that it has, independently and without reliance on the
Agent or any other Lender, and based on such documents and information as it has
deemed appropriate, made its own credit analysis of the Obligors and its
decision to enter into this Agreement, and that it will, independently and
without reliance upon the Agent or any other Lender, and based on such documents
and information as it shall deem appropriate at the time, continue to make its
own analysis and decisions in taking or not taking action under this Agreement.
The Agent shall not be required to keep itself informed as to the performance or
observance by the Obligors of this Agreement, the Notes, the Security
Instruments or any other document referred to or provided for herein or to
inspect the properties or books of the Obligors. Except for notices, reports and
other documents and information expressly required to be furnished to the
Lenders by the Agent hereunder, the Agent shall not have any duty or
responsibility to provide any Lender with any credit or other information
concerning the affairs, financial condition or business of the Obligors (or any
of its Affiliates) which may come into the possession of the Agent or any of its
Affiliates. In this regard, each Lender acknowledges that Vinson & Elkins L.L.P.
is acting in this transaction as special counsel to the Agent only, except to
the extent otherwise expressly stated in any legal opinion or any Loan Document.
Each Lender will consult with its own legal counsel to the extent that it deems
necessary in connection with the Loan Documents and the matters contemplated
therein.

            Section 11.07 ACTION BY AGENT. Except for action or other matters
expressly required of the Agent hereunder, the Agent shall in all cases be fully
justified in failing or refusing to act

                                    -83-
<PAGE>



hereunder unless it shall (i) receive written instructions from a majority of
the Lenders specifying the action to be taken, and (ii) be indemnified to its
satisfaction by the Lenders against any and all liability and expenses which may
be incurred by it by reason of taking or continuing to take any such action. The
instructions of a majority of the Lenders and any action taken or failure to act
pursuant thereto by the Agent shall be binding on all of the Lenders. If a
Default has occurred and is continuing, the Agent shall take such action with
respect to such Default as shall be directed by a majority of the Lenders in the
written instructions (with indemnities) described in this Section 11.07,
provided that, unless and until the Agent shall have received such directions,
the Agent may (but shall not be obligated to) take such action, or refrain from
taking such action, with respect to such Default as it shall deem advisable in
the best interests of the Lenders. In no event, however, shall the Agent be
required to take any action which exposes the Agent to personal liability or
which is contrary to this Agreement and the Security Instruments or applicable
law.

            Section 11.08 RESIGNATION OR REMOVAL OF AGENT. Subject to the
appointment and acceptance of a successor Agent as provided below, the Agent may
resign at any time by giving notice thereof to the Lenders and the Borrowers,
and the Agent may be removed at any time with or without cause by a majority of
the Lenders. Upon any such resignation or removal, a majority of the Lenders
shall have the right to appoint a successor Agent. If no successor Agent shall
have been so appointed by a majority of the Lenders and shall have accepted such
appointment within thirty (30) days after the retiring Agent's giving of notice
of resignation or a majority of the Lenders' removal of the retiring Agent, then
the retiring Agent may, on behalf of the Lenders, appoint a successor Agent.
Upon the acceptance of such appointment hereunder by a successor Agent, such
successor Agent shall thereupon succeed to and become vested with all the
rights, powers, privileges and duties of the retiring Agent, and the retiring
Agent shall be discharged from its duties and obligations hereunder. After any
retiring Agent's resignation or removal hereunder as Agent, the provisions of
this Article XI and Section 12.03 shall continue in effect for its benefit in
respect of any actions taken or omitted to be taken by it while it was acting as
the Agent.

            Section 11.09 CSI. CSI shall not have any rights, powers,
obligation, liabilities, responsibilities, or duties under any Loan Document.


                                  ARTICLE XII

                                 MISCELLANEOUS

            Section 12.01 WAIVER. No failure on the part of the Agent or any
Lender to exercise and no delay in exercising, and no course of dealing with
respect to, any right, power or privilege under any of the Loan Documents shall
operate as a waiver thereof, nor shall any single or partial exercise of any
right, power or privilege under any of the Loan Documents preclude any other or

                                    -84-
<PAGE>
further exercise thereof or the exercise of any other right, power or privilege.
The remedies provided herein are cumulative and not exclusive of any remedies
provided by law.

            Section 12.02 NOTICES. All notices and other communications provided
for herein and in the Security Instruments (including, without limitation, any
modifications of, or waivers or consents under, this Agreement or the Security
Instruments) shall be given or made by telex, telecopy, telegraph, cable,
courier or U.S. Mail or in writing and telexed, telecopied, telegraphed, cabled,
mailed or delivered to the intended recipient at the "Address for Notices"
specified below its name on the signature pages hereof or in the Security
Instruments or, as to any party, at such other address as shall be designated by
such party in a notice to each other party. Except as otherwise provided in this
Agreement or in the Security Instruments, all such communications shall be
deemed to have been duly given when transmitted by telex or telecopier,
delivered to the telegraph or cable office or personally delivered or, in the
case of a mailed notice, three (3) Business Days after the date deposited in the
mails, postage prepaid, in each case given or addressed as aforesaid.

            Section 12.03  PAYMENT OF EXPENSES, INDEMNITIES, ETC.

            (a) THE OBLIGORS AGREE (I) TO PAY OR REIMBURSE EACH LENDER, THE
      AGENT AND CSI FOR ALL THEIR REASONABLE OUT-OF-POCKET COSTS AND EXPENSES
      INCURRED IN CONNECTION WITH THE DEVELOPMENT, SYNDICATION, PREPARATION AND
      EXECUTION OF, AND ANY AMENDMENT, SUPPLEMENT OR MODIFICATION TO, THIS
      AGREEMENT AND THE OTHER LOAN DOCUMENTS AND ANY OTHER DOCUMENTS PREPARED IN
      CONNECTION HEREWITH OR THEREWITH, AND THE CONSUMMATION AND ADMINISTRATION
      OF THE TRANSACTIONS CONTEMPLATED HEREBY AND THEREBY, INCLUDING, WITHOUT
      LIMITATION, THE REASONABLE FEES AND DISBURSEMENTS OF (A) COUNSEL TO THE
      AGENT AND (B) THE AGENT CUSTOMARILY CHARGED BY IT IN CONNECTION WITH
      SYNDICATED CREDITS, (II) TO PAY OR REIMBURSE EACH LENDER, THE AGENT AND
      CSI FOR ALL THEIR COSTS AND EXPENSES INCURRED IN CONNECTION WITH THE
      ENFORCEMENT OR PRESERVATION OF ANY RIGHTS UNDER THIS AGREEMENT, THE OTHER
      LOAN DOCUMENTS AND ANY SUCH OTHER DOCUMENTS, INCLUDING, WITHOUT
      LIMITATION, THE REASONABLE FEES AND DISBURSEMENTS OF COUNSEL (INCLUDING,
      WITHOUT LIMITATION, THE ALLOCATED COSTS OF IN-HOUSE COUNSEL) TO EACH
      LENDER AND OF COUNSEL TO THE AGENT, (III) TO PAY, INDEMNIFY, HOLD EACH
      LENDER, THE AGENT AND CSI (AND THEIR RESPECTIVE DIRECTORS, OFFICERS,
      EMPLOYEES AND AGENTS)("INDEMNIFIED PARTIES") HARMLESS FROM, ANY AND ALL
      RECORDING AND FILING FEES AND ANY AND ALL LIABILITIES WITH RESPECT TO, OR
      RESULTING FROM ANY DELAY IN PAYING, STAMP, EXCISE AND OTHER TAXES, IF ANY,
      WHICH MAY BE PAYABLE OR DETERMINED TO BE PAYABLE IN CONNECTION WITH THE
      EXECUTION AND DELIVERY OF, OR CONSUMMATION OR ADMINISTRATION OF ANY OF THE
      TRANSACTIONS CONTEMPLATED BY, OR ANY AMENDMENT, SUPPLEMENT OR MODIFICATION
      OF, OR ANY WAIVER OR

                                    -85-
<PAGE>
      CONSENT UNDER OR IN RESPECT OF, THIS AGREEMENT, THE OTHER LOAN DOCUMENTS
      AND ANY SUCH OTHER DOCUMENTS, AND (IV) TO PAY, INDEMNIFY, AND HOLD EACH
      INDEMNIFIED PARTY HARMLESS FROM AND AGAINST ANY AND ALL OTHER LIABILITIES,
      OBLIGATIONS, LOSSES, DAMAGES (INCLUDING, WITHOUT LIMITATION, CONSEQUENTIAL
      DAMAGES), PENALTIES, ACTIONS, JUDGMENTS, SUITS, COSTS, EXPENSES OR
      DISBURSEMENTS OF ANY KIND OR NATURE AS A RESULT OF, ARISING OUT OF OR IN
      ANY WAY RELATED TO THE EXECUTION, DELIVERY, ENFORCEMENT, PERFORMANCE AND
      ADMINISTRATION OF THIS AGREEMENT, THE OTHER LOAN DOCUMENTS OR THE USE OR
      THE PROPOSED USE OF PROCEEDS, CONTEMPLATED BY THIS AGREEMENT OR IN
      CONNECTION WITH ANY SUCH OTHER DOCUMENTS, INCLUDING, WITHOUT LIMITATION,
      ANY OF THE FOREGOING RELATING TO THE VIOLATION OF, NONCOMPLIANCE WITH OR
      LIABILITY UNDER, ANY ENVIRONMENTAL LAW APPLICABLE TO THE PAST, PRESENT, OR
      FUTURE OPERATIONS OF THE OBLIGORS, OR APPLICABLE TO THE OBLIGORS' PAST,
      PRESENT, OR FUTURE OWNERSHIP OF ANY PROPERTY (ALL OF THE FOREGOING IN THIS
      CLAUSE (IV), COLLECTIVELY, THE "INDEMNITY MATTERS"), INCLUDING INDEMNITY
      MATTERS ARISING BY REASON OF THE ORDINARY NEGLIGENCE OF ANY INDEMNIFIED
      PARTY, PROVIDED THAT THE OBLIGORS SHALL HAVE NO OBLIGATION UNDER THIS
      CLAUSE (IV) TO ANY INDEMNIFIED PARTY WITH RESPECT TO INDEMNIFIED
      LIABILITIES ARISING FROM THE GROSS NEGLIGENCE OR WILLFUL MISCONDUCT OF
      SUCH PERSON.

            (b) No Indemnified Party may settle any claim to be indemnified
      without the consent of the indemnitor, such consent not to be unreasonably
      withheld; provided, that it shall not be reasonable for the indemnitor to
      withhold consent to any settlement that an Indemnified Party proposes, if
      the indemnitor does not have the financial ability to pay all its
      obligations outstanding and asserted against the indemnitor at that time,
      including the maximum potential claims against the Indemnified Party to be
      indemnified pursuant to this Section 12.03.

            (c) In the case of any indemnification hereunder, the Agent or
      Lender, as appropriate shall give notice to the Obligors of any such claim
      or demand being made against the Indemnified Party and the Obligors shall
      have the non-exclusive right to join in the defense against any such claim
      or demand provided that if the Obligors provide a defense, the Indemnified
      Party shall bear its own cost of defense unless there is a conflict
      between the Obligors and such Indemnified Party.

            (d) THE FOREGOING INDEMNITIES SHALL EXTEND TO THE INDEMNIFIED
      PARTIES NOTWITHSTANDING THE SOLE OR CONCURRENT NEGLIGENCE OF EVERY KIND OR
      CHARACTER WHATSOEVER, WHETHER ACTIVE OR PASSIVE, WHETHER AN AFFIRMATIVE
      ACT OR AN OMISSION, INCLUDING WITHOUT LIMITATION, ALL TYPES OF NEGLIGENT
      CONDUCT IDENTIFIED IN THE RESTATEMENT (SECOND) OF TORTS OF ONE OR MORE OF
      THE

                                    -86-
<PAGE>
      INDEMNIFIED PARTIES OR BY REASON OF STRICT LIABILITY IMPOSED WITHOUT FAULT
      ON ANY ONE OR MORE OF THE INDEMNIFIED PARTIES. TO THE EXTENT THAT AN
      INDEMNIFIED PARTY IS FOUND TO HAVE COMMITTED AN ACT OF GROSS NEGLIGENCE OR
      WILLFUL MISCONDUCT, THIS CONTRACTUAL OBLIGATION OF INDEMNIFICATION SHALL
      CONTINUE BUT SHALL ONLY EXTEND TO THE PORTION OF THE CLAIM THAT IS FOUND
      TO HAVE OCCURRED BY REASON OF EVENTS OTHER THAN THE GROSS NEGLIGENCE OR
      WILLFUL MISCONDUCT OF THE INDEMNIFIED PARTY.

            (e) The Obligors' obligations under this Section 12.03 shall survive
      any termination of this Agreement and the payment of the Notes and shall
      continue thereafter in full force and effect.

            (f) The Obligors shall pay any amounts due under this Section 12.03
      within thirty (30) days of the receipt by the Obligors of notice of the
      amount due.

            Section 12.04 AMENDMENTS, ETC. Any provision of this Agreement or
any Security Instrument may be amended, modified or waived with the Obligors'
and the Majority Lenders' prior written consent; provided that (i) no amendment,
modification or waiver which extends the maturity of the Loans, increases the
Aggregate Maximum Revolving Credit Amounts, modifies the Borrowing Base,
forgives the principal amount of any Indebtedness outstanding under this
Agreement, releases any of the collateral (other than pursuant to Section 9.14
or as otherwise expressly provided by this Agreement), reduces the interest rate
applicable to the Loans or the fees payable to the Lenders generally, affects
Section 2.03(a), this Section 12.04 or Section 12.06(a) or modifies the
definition of "Majority Lenders" shall be effective without consent of all
Lenders; (ii) no amendment, modification or waiver which increases the Maximum
Revolving Credit Amount of any Lender shall be effective without the consent of
such Lender; and (iii) no amendment, modification or waiver which modifies the
rights, duties or obligations of the Agent shall be effective without the
consent of the Agent.

            Section 12.05 SUCCESSORS AND ASSIGNS. This Agreement shall be
binding upon and inure to the benefit of the parties hereto and their respective
successors and permitted assigns.

            Section 12.06  ASSIGNMENTS AND PARTICIPATIONS.

            (a) The Borrowers may not assign their rights or obligations
      hereunder or under the Notes or any Letters of Credit without the prior
      consent of all of the Lenders and the Agent.

            (b) Any Lender may, upon the written consent of the Agent and, and
      if no Event of Default has occurred and is continuing, the Borrowers
      (which consent will not be

                                    -87-
<PAGE>
      unreasonably withheld), assign to one or more assignees all or a portion
      of its rights and obligations under this Agreement pursuant to an
      Assignment Agreement substantially in the form of EXHIBIT F (an
      "ASSIGNMENT") PROVIDED, HOWEVER, that (i) any such assignment shall be in
      the amount of at least $5,000,000 or such lesser amount to which the
      Borrowers and the Agent have consented and (ii) the assignee shall pay to
      the Agent a processing and recordation fee of $2,500 for each assignment.
      Any such assignment will become effective upon the execution and delivery
      to the Agent of the Assignment and the consent of the Agent and the
      Borrowers. Promptly after receipt of an executed Assignment, the Agent
      shall send to the Borrowers a copy of such executed Assignment. Upon
      receipt of such executed Assignment, the Borrowers will, at their own
      expense, execute and deliver new Notes to the assignor and/or assignee, as
      appropriate, in accordance with their respective interests as they appear.
      Upon the effectiveness of any assignment pursuant to this Section
      12.06(b), the assignee will become a "Lender," if not already a "Lender,"
      for all purposes of this Agreement and the Security Instruments. The
      assignor shall be relieved of its obligations hereunder to the extent of
      such assignment (and if the assigning Lender no longer holds any rights or
      obligations under this Agreement, such assigning Lender shall cease to be
      a "Lender" hereunder except that its rights under Sections 4.06, 5.01,
      5.05 and 12.03 shall not be affected). The Agent will prepare on the last
      Business Day of each month during which an assignment has become effective
      pursuant to this Section 12.06(b), a new EXHIBIT G giving effect to all
      such assignments effected during such month, and will promptly provide the
      same to the Borrowers and each of the Lenders.

            (c) Each Lender may transfer, grant or make participations in all or
      any part of such Lender's interests hereunder pursuant to this Section
      12.06(c) to any Person, PROVIDED that: (i) such Lender shall remain a
      "Lender" for all purposes of this Agreement and the transferee of such
      participation shall not constitute a "Lender" hereunder; and (ii) no
      participant under any such participation shall have rights to approve any
      amendment to or waiver of any of the Loan Documents except to the extent
      such amendment or waiver would (x) extend the Revolving Credit Termination
      Date, (y) reduce the interest rate (other than as a result of waiving the
      applicability of any post-default increases in interest rates) or fees
      applicable to any of the Commitments or Loans or Letters of Credit in
      which such participant is participating, or postpone the payment of any
      thereof, or (z) release all or substantially all of the collateral (except
      as expressly provided in the Security Instruments) supporting any of the
      Commitments or Loans or Letters of Credit in which such participant is
      participating. In the case of any such participation, the participant
      shall not have any rights under this Agreement or any of the Security
      Instruments (the participant's rights against the granting Lender in
      respect of such participation to be those set forth in the agreement with
      such Lender creating such participation), and all amounts payable by the
      Borrowers hereunder shall be determined as if such Lender had not sold
      such participation, PROVIDED that such participant shall be entitled to
      receive additional amounts under Article V on the same basis

                                    -88-
<PAGE>
      as if it were a Lender and be indemnified under Section 12.03 as if it
      were a Lender. In addition, each agreement creating any participation must
      include an agreement by the participant to be bound by the provisions of
      Section 12.15.

            (d) The Lenders may furnish any information concerning the Borrowers
      in the possession of the Lenders from time to time to assignees and
      participants (including prospective assignees and participants); provided
      that, such Persons agree (prior to any such information being furnished)
      to be bound by the provisions of Section 12.15 hereof.

            (e) Notwithstanding anything in this Section 12.06 to the contrary,
      any Lender may assign and pledge all or any of its Notes to any Federal
      Reserve Bank or the United States Treasury as collateral security pursuant
      to Regulation A of the Board of Governors of the Federal Reserve System
      and any operating circular issued by such Federal Reserve System and/or
      such Federal Reserve Bank. No such assignment and/or pledge shall release
      the assigning and/or pledging Lender from its obligations hereunder.

            (f) Notwithstanding any other provisions of this Section 12.06, no
      transfer or assignment of the interests or obligations of any Lender or
      any grant of participations therein shall be permitted if such transfer,
      assignment or grant would require the Borrowers to file a registration
      statement with the SEC or to qualify the Loans under the "Blue Sky" laws
      of any state.

            Section 12.07 INVALIDITY. In the event that any one or more of the
provisions contained in any of the Loan Documents or the Letters of Credit, the
Letter of Credit Agreements shall, for any reason, be held invalid, illegal or
unenforceable in any respect, such invalidity, illegality or unenforceability
shall not affect any other provision of the Notes, this Agreement or any
Security Instrument.

            Section 12.08 COUNTERPARTS. This Agreement may be executed in any
number of counterparts, all of which taken together shall constitute one and the
same instrument and any of the parties hereto may execute this Agreement by
signing any such counterpart.

            Section 12.09 REFERENCES. The words "herein," "hereof," "hereunder"
and other words of similar import when used in this Agreement refer to this
Agreement as a whole, and not to any particular article, section or subsection.
Any reference herein to a Section shall be deemed to refer to the applicable
Section of this Agreement unless otherwise stated herein. Any reference herein
to an exhibit or schedule shall be deemed to refer to the applicable exhibit or
schedule attached hereto unless otherwise stated herein.


                                    -89-
<PAGE>
            Section 12.10 SURVIVAL. The obligations of the parties under Section
4.06, Article V, and Sections 11.05 and 12.03 shall survive the repayment of the
Loans and the termination of the Commitments. To the extent that any payments on
the Indebtedness or proceeds of any collateral are subsequently invalidated,
declared to be fraudulent or preferential, set aside or required to be repaid to
a trustee, debtor in possession, receiver or other Person under any bankruptcy
law, common law or equitable cause, then to such extent, the Indebtedness so
satisfied shall be revived and continue as if such payment or proceeds had not
been received and the Agent's and the Lenders' Liens, security interests,
rights, powers and remedies under this Agreement and each Security Instrument
shall continue in full force and effect. In such event, each Security Instrument
shall be automatically reinstated and the Obligors shall take such action as may
be reasonably requested by the Agent and the Lenders to effect such
reinstatement.

            Section 12.11 CAPTIONS. Captions and section headings appearing
herein are included solely for convenience of reference and are not intended to
affect the interpretation of any provision of this Agreement.

            Section 12.12 NO ORAL AGREEMENTS. The Loan Documents embody the
entire agreement and understanding between the parties and supersede all other
agreements and understandings between such parties relating to the subject
matter hereof and thereof. The Loan Documents represent the final agreement
between the parties and may not be contradicted by evidence of prior,
contemporaneous or subsequent oral agreements of the parties. There are no
unwritten oral agreements between the parties.

            Section 12.13  GOVERNING LAW; SUBMISSION TO JURISDICTION.

            (A) THIS AGREEMENT AND THE NOTES SHALL BE GOVERNED BY, AND CONSTRUED
      IN ACCORDANCE WITH, THE LAWS OF THE STATE OF TEXAS EXCEPT TO THE EXTENT
      THAT UNITED STATES FEDERAL LAW PERMITS ANY LENDER TO CHARGE INTEREST AT
      THE RATE ALLOWED BY THE LAWS OF THE STATE WHERE SUCH LENDER IS LOCATED.
      CH. 346 OF THE TEXAS FINANCE CODE (WHICH REGULATES CERTAIN REVOLVING
      CREDIT LOAN ACCOUNTS AND REVOLVING TRI-PARTY ACCOUNTS) SHALL NOT APPLY TO
      THIS AGREEMENT OR THE NOTES.

            (B) ANY LEGAL ACTION OR PROCEEDING WITH RESPECT TO THE LOAN
      DOCUMENTS SHALL BE BROUGHT IN THE COURTS OF THE STATE OF TEXAS OR OF THE
      UNITED STATES OF AMERICA FOR THE SOUTHERN DISTRICT OF TEXAS, AND, BY
      EXECUTION AND DELIVERY OF THIS AGREEMENT, EACH OBLIGOR HEREBY ACCEPTS FOR
      ITSELF AND (TO THE EXTENT PERMITTED BY LAW) IN RESPECT OF ITS PROPERTY,
      GENERALLY AND UNCONDITIONALLY, THE JURISDICTION OF THE AFORESAID COURTS.
      EACH OBLIGOR HEREBY IRREVOCABLY WAIVES ANY OBJECTION, INCLUDING, WITHOUT

                                    -90-
<PAGE>
      LIMITATION, ANY OBJECTION TO THE LAYING OF VENUE OR BASED ON THE GROUNDS
      OF FORUM NON CONVENIENS, WHICH IT MAY NOW OR HEREAFTER HAVE TO THE
      BRINGING OF ANY SUCH ACTION OR PROCEEDING IN SUCH RESPECTIVE
      JURISDICTIONS. THIS SUBMISSION TO JURISDICTION IS NON-EXCLUSIVE AND DOES
      NOT PRECLUDE THE AGENT OR ANY LENDER FROM OBTAINING JURISDICTION OVER ANY
      OF THE OBLIGORS IN ANY COURT OTHERWISE HAVING JURISDICTION.

            (C) EACH OBLIGOR HEREBY IRREVOCABLY DESIGNATES KELLEY OIL
      CORPORATION LOCATED AT 601 JEFFERSON, SUITE 1100, HOUSTON, TEXAS 77002, AS
      THE DESIGNEE, APPOINTEE AND AGENT OF SUCH OBLIGOR TO RECEIVE, FOR AND ON
      BEHALF OF SUCH OBLIGOR, SERVICE OF PROCESS IN SUCH RESPECTIVE
      JURISDICTIONS IN ANY LEGAL ACTION OR PROCEEDING WITH RESPECT TO THE LOAN
      DOCUMENTS. IT IS UNDER STOOD THAT A COPY OF SUCH PROCESS SERVED ON SUCH
      AGENT WILL BE PROMPTLY FORWARDED TO SUCH OBLIGOR AT ITS ADDRESS SET FORTH
      UNDER ITS SIGNATURE BELOW, BUT THE FAILURE OF SUCH OBLIGOR TO RECEIVE SUCH
      COPY SHALL NOT AFFECT IN ANY WAY THE SERVICE OF SUCH PROCESS. EACH OBLIGOR
      FURTHER IRREVOCABLY CONSENTS TO THE SERVICE OF PROCESS OF ANY OF THE
      AFOREMENTIONED COURTS IN ANY SUCH ACTION OR PROCEEDING BY THE MAILING OF
      COPIES THEREOF BY REGISTERED OR CERTIFIED MAIL, POSTAGE PREPAID, TO SUCH
      OBLIGOR AT ITS SAID ADDRESS, SUCH SERVICE TO BECOME EFFECTIVE THREE (3)
      DAYS AFTER SUCH MAILING.

            (D) NOTHING HEREIN SHALL AFFECT THE RIGHT OF THE AGENT OR ANY LENDER
      OR ANY HOLDER OF A NOTE TO SERVE PROCESS IN ANY OTHER MANNER PERMITTED BY
      LAW OR TO COMMENCE LEGAL PROCEEDINGS OR OTHERWISE PROCEED AGAINST THE
      OBLIGORS IN ANY OTHER JURISDICTION.

            Section 12.14 INTEREST. It is the intention of the parties hereto
that each Lender shall conform strictly to usury laws applicable to it.
Accordingly, if the transactions contemplated hereby would be usurious as to any
Lender under laws applicable to it (including the laws of the United States of
America and the State of New York or any other jurisdiction whose laws may be
mandatorily applicable to such Lender notwithstanding the other provisions of
this Agreement), then, in that event, notwithstanding anything to the contrary
in any of the Loan Documents or any agreement entered into in connection with or
as security for the Notes, it is agreed as follows: (i) the aggregate of all
consideration which constitutes interest under law applicable to any Lender that
is contracted for, taken, reserved, charged or received by such Lender under any
of the Loan Documents or agreements or otherwise in connection with the Notes
shall under no circumstances exceed the maximum amount allowed by such
applicable law, and any excess shall be canceled automatically and if
theretofore paid shall be credited by such Lender on the principal amount of the
Indebtedness (or, to the extent that the principal amount of the Indebtedness
shall have been or would thereby be paid in full, refunded by such Lender to the
Borrowers); and (ii) in the event that

                                    -91-
<PAGE>
the maturity of the Notes is accelerated by reason of an election of the holder
thereof resulting from any Event of Default under this Agreement or otherwise,
or in the event of any required or permitted prepayment, then such consideration
that constitutes interest under law applicable to any Lender may never include
more than the maximum amount allowed by such applicable law, and excess
interest, if any, provided for in this Agreement or otherwise shall be canceled
automatically by such Lender as of the date of such acceleration or prepayment
and, if theretofore paid, shall be credited by such Lender on the principal
amount of the Indebtedness (or, to the extent that the principal amount of the
Indebtedness shall have been or would thereby be paid in full, refunded by such
Lender to the Borrowers). All sums paid or agreed to be paid to any Lender for
the use, forbearance or detention of sums due hereunder shall, to the extent
permitted by law applicable to such Lender, be amortized, prorated, allocated
and spread throughout the full term of the Loans evidenced by the Notes until
payment in full so that the rate or amount of interest on account of any Loans
hereunder does not exceed the maximum amount allowed by such applicable law. If
at any time and from time to time (i) the amount of interest payable to any
Lender on any date shall be computed at the Highest Lawful Rate applicable to
such Lender pursuant to this Section 12.14 and (ii) in respect of any subsequent
interest computation period the amount of interest otherwise payable to such
Lender would be less than the amount of interest payable to such Lender computed
at the Highest Lawful Rate applicable to such Lender, then the amount of
interest payable to such Lender in respect of such subsequent interest
computation period shall continue to be computed at the Highest Lawful Rate
applicable to such Lender until the total amount of interest payable to such
Lender shall equal the total amount of interest which would have been payable to
such Lender if the total amount of interest had been computed without giving
effect to this Section 12.14.

            Section 12.15 CONFIDENTIALITY. In the event that the Borrowers
provide to the Agent or the Lenders written confidential information belonging
to the Borrowers, if the Borrowers shall denominate such information in writing
as "confidential", the Agent and the Lenders shall thereafter maintain such
information in confidence in accordance with reasonable standards of care and
diligence and not use or exploit such information for any purpose other than the
transaction contemplated hereunder. This obligation of confidence shall not
apply to such portions of the information which (i) are in the public domain,
(ii) hereafter become part of the public domain without the Agent or the Lenders
breaching their obligation of confidence to the Borrowers, (iii) are previously
known by the Agent or the Lenders from some source other than the Borrowers,
(iv) are hereafter developed by the Agent or the Lenders without using the
Borrowers' information, (v) are hereafter obtained by or available to the Agent
or the Lenders from a third party who owes no obligation of confidence to the
Borrowers with respect to such information or through any other means other than
through disclosure by the Borrowers, (vi) are disclosed with the Borrowers'
consent, (vii) must be disclosed either pursuant to any Governmental Requirement
or to Persons regulating the activities of the Agent or the Lenders, or (viii)
as may be required by law or regulation or order of any Governmental Authority
in any judicial, arbitration or governmental proceeding. Further, the Agent or a
Lender may disclose any such information to an Affiliate, any other Lender,

                                    -92-
<PAGE>
any independent petroleum engineers or consultants, any independent certified
public accountants, any legal counsel employed by such Person in connection with
this Agreement or any Security Instrument, including without limitation, the
enforcement or exercise of all rights and remedies thereunder, or any assignee
or participant (including prospective assignees and participants) in the Loans;
provided, however, that the Agent or Lender imposes on the Person to whom such
information is disclosed the same obligation to maintain the confidentiality of
such information as is imposed upon it hereunder. Notwithstanding anything to
the contrary provided herein, this obligation of confidence shall cease three
(3) years from the date the information was furnished, unless the Borrowers
request in writing at least thirty (30) days prior to the expiration of such
three year period, to maintain the confidentiality of such information for an
additional three year period. The Borrowers waive any and all other rights it
may have to confidentiality as against the Agent and the Lenders arising by
contract, agreement, statute or law except as expressly stated in this Section
12.15.

            Section 12.16  EFFECTIVENESS.  This Agreement shall be effective on 
the Closing Date (the "EFFECTIVE DATE").

            Section 12.17 PRIOR DEBT SECURITY INSTRUMENTS. In the event that any
of the terms, conditions, covenants, representations, or warranties contained in
any of the Security Instruments assigned to the Lender by the Prior Debt holders
are inconsistent or conflict with the terms of this Agreement, the terms of this
Agreement shall control for all purposes.

            Section 12.18 RELEASE OF SECURITY INSTRUMENTS. Upon payment in full
of the Indebtedness and termination of the Commitment and this Credit Agreement,
the Agent and the Lenders shall promptly cause satisfaction and release of the
Security Instruments to be entered upon the record at the expense of the
Borrowers and shall execute and deliver or cause to be executed and delivered
such instruments of satisfaction and release as may be appropriate to effectuate
same.

                         [SIGNATURES BEGIN NEXT PAGE]

                                    -93-
<PAGE>
            The parties hereto have caused this Agreement to be duly executed as
of the day and year first above written.

BORROWERS:                 KELLEY OPERATING COMPANY, LTD.

                           By: Kelley Oil Corporation,
                               its Managing General Partner


                           By: /s/ STEPHEN M.SMITH
                              --------------------
                               Stephen M. Smith
                               Treasurer

                           Address for Notices:

                           Kelley Oil Corporation
                           601 Jefferson, Suite 1100
                           Houston, Texas 77002

                           Telecopier No.: (713) 654-2553
                           Telephone No.: (713) 654-2510
                           Attention:  Chief Financial Officer


                           KELLEY OIL CORPORATION


                           By: /s/ STEPHEN M.SMITH
                              --------------------
                               Stephen M. Smith
                               Treasurer

                           Address for Notices:

                           Kelley Oil Corporation
                           601 Jefferson, Suite 1100
                           Houston, Texas 77002

                           Telecopier No.: (713) 654-2553
                           Telephone No.: (713) 654-2510
                           Attention:  Chief Financial Officer

                                   S - 1
<PAGE>
                          KELLEY OIL & GAS CORPORATION


                           By: /s/ STEPHEN M.SMITH
                              --------------------
                               Stephen M. Smith
                               Treasurer


                          Address for Notices:

                          Kelley Oil Corporation
                          601 Jefferson, Suite 1100
                          Houston, Texas 77002

                          Telecopier No.: (713) 654-2553
                          Telephone No.: (713) 654-2510
                          Attention:  Chief Financial Officer

GUARANTORS:               CONCORDE GAS MARKETING, INC.


                           By: /s/ STEPHEN M.SMITH
                              --------------------
                               Stephen M. Smith
                               Treasurer


                          Address for Notices:

                          Kelley Oil Corporation
                          601 Jefferson, Suite 1100
                          Houston, Texas 77002

                          Telecopier No.: (713) 654-2553
                          Telephone No.: (713) 654-2510
                          Attention:  Chief Financial Officer

                                   S - 2
<PAGE>
                          KELLEY PARTNERS 1992 DEVELOPMENT
                          DRILLING JOINT VENTURE

                          By: Kelley Partners 1992 Development Drilling
                              Program, the Managing Joint Venturer

                          By: Kelley Oil Corporation, its Managing
                              General Partner


                           By: /s/ STEPHEN M.SMITH
                              --------------------
                               Stephen M. Smith
                               Treasurer

                          Address for Notices:

                          Kelley Oil Corporation
                          601 Jefferson, Suite 1100
                          Houston, Texas 77002

                          Telecopier No.: (713) 654-2553
                          Telephone No.: (713) 654-2510
                          Attention: Chief Financial Officer

                                   S - 3
<PAGE>
                          KELLEY PARTNERS 1994 DEVELOPMENT
                          DRILLING JOINT VENTURE

                          By: Kelley Partners 1994 Development Drilling
                              Program, the Managing Joint Venturer

                          By: Kelley Oil Corporation, its Managing
                              General Partner

                          By: /s/ STEPHEN M.SMITH
                              --------------------
                              Stephen M. Smith
                              Treasurer


                          Address for Notices:

                          Kelley Oil Corporation
                          601 Jefferson, Suite 1100
                          Houston, Texas 77002

                          Telecopier No.: (713) 654-2553
                          Telephone No.: (713) 654-2510
                          Attention: Chief Financial Officer

                                   S - 4
<PAGE>
                          KELLEY PARTNERS 1992
                          DEVELOPMENT DRILLING PROGRAM


                          By:   Kelley Oil Corporation, its Managing
                                General Partner


                           By: /s/ STEPHEN M.SMITH
                              --------------------
                               Stephen M. Smith
                               Treasurer


                          Address for Notices:

                          Kelley Oil Corporation
                          601 Jefferson, Suite 1100
                          Houston, Texas 77002

                          Telecopier No.: (713) 654-2553
                          Telephone No.: (713) 654-2510
                          Attention:  Chief Financial Officer

                                   S - 5
<PAGE>
                          KELLEY PARTNERS 1994 DEVELOPMENT
                          DRILLING PROGRAM

                          By: Kelley Oil Corporation, its Managing
                              General Partner

                          By: STEPHEN M. SMITH
                              --------------------
                              Stephen M. Smith
                              Treasurer

                          Address for Notices:

                          Kelley Oil Corporation
                          601 Jefferson, Suite 1100
                          Houston, Texas 77002

                          Telecopier No.: (713) 654-2553
                          Telephone No.: (713) 654-2510
                          Attention:  Chief Financial Officer

                                   S - 6
<PAGE>
LENDER AND AGENT:         TEXAS COMMERCE BANK NATIONAL
                          ASSOCIATION, individually and as Agent


                          By: /s/ RUSSELL A. JOHNSON
                              ----------------------
                          Name: Russell A. Johnson
                          Title:    Vice President

                          Lending Office for Base Rate and
                          Eurodollar Loans (Borrowing
                          Notification, Rate Setting Information
                          and Relationship Manager Information):

                          712 Main Street, 5th Floor
                          Houston, Texas 77002

                          Telecopier No.: (713) 216-4117
                          Telephone No.: (713) 216-4147
                          Attention: Bob Mertensotto
                          Managing Director


                          Notices for Receipt and Payment of Funds:

                          Loan Syndication Services
                          1111 Fannin, 9th Floor MS 46
                          Houston, Texas 77002

                          Telecopier No.: (713) 750-3810
                          Telephone No.: (713) 750-2784

                                      S - 7
<PAGE>
LENDERS:                  UNION BANK OF CALIFORNIA, N.A.


                          By: /s/ CARL STUTZMAN
                              ---------------------
                          Name: Carl Stutzman
                          Title:Vice President


                          By: /s/ RANDALL OSTERBERG
                              ---------------------
                          Name: Randall Osterberg
                          Title:Vice President

                          Lending Office for Base Rate and
                          Eurodollar Loans:

                          Specialized Lending Note Center
                          1980 Saturn Street
                          Monterey Park, CA 91754

                          Address for Notices:

                          4200 Lincoln Plaza
                          500 N. Akard
                          Dallas, TX  75201

                          Telecopier No.:   214-922-4209
                          Telephone No.:   214-922-4200
                          Attention: Carl Stutzman

                                   S - 8
<PAGE>
                          BANQUE PARIBAS


                          By: /s/ BARTON D. SCHOUEST
                              ----------------------
                          Barton D. Schouest
                          Group Vice President


                          By: /s/ DOUGLAS LIFTMAN
                              --------------------
                          Douglas Liftman
                          Vice President

                          Lending Office for Base Rate and
                          Eurodollar Loans:

                          1200 Smith Street, Suite 3100
                          Houston, Texas 77002

                          Address for Notices:

                          1200 Smith Street, Suite 3100
                          Houston, Texas 77002

                          Telecopier No.: (713) 659-6915
                          Telephone No.: (713) 659-4811
                          Attention: Douglas Liftman

                                   S - 9
<PAGE>
                          BANK OF AMERICA NATIONAL TRUST
                          AND SAVINGS ASSOCIATION


                          By: /s/ RONALD E. MCKAIG
                              --------------------
                          Name: Ronald E. McKaig
                          Title:Vice President


                          Lending Office for Base Rate and
                          Eurodollar Loans:

                          Bank of America National Trust and Savings
                          Association
                          231 South LaSalle Street
                          Chicago, Illinois  60697
                          Telecopier No.:  312/974-9626
                          Telephone No.:  312/828-4575
                          Attention:  Gloria J. Turner

                          Address for Notices:

                          Bank of America National Trust and Savings
                          Association
                          333 Clay Street, Suite 4550
                                          Houston, Texas  77002
                                          Attention:  Ronald E. McKaig
                                          Telecopier No.:  713/651-4841
                                          Telephone No.:  713/651-4881

                                   S - 10
<PAGE>
                  AMENDED AND RESTATED BANK CREDIT AGREEMENT
                         Dated as of December 1, 1997

                    LIST OF EXHIBITS / SCHEDULES (Not Filed)*



Exhibit A-1       Form of Revolving Credit Note
Exhibit A-2       Form of Term Note
Exhibit B         Form of Borrowing, Continuation and Conversion Request
Exhibit C         Form of Compliance Certificate
Exhibit D         List of Security Instruments
Exhibit E         Form of Assignment Agreement
Exhibit F         List of Maximum Revolving Credit Amounts and Term Loans

Schedule 7.02     Liabilities
Schedule 7.03     Litigation
Schedule 7.09     Taxes
Schedule 7.10     Titles, etc.
Schedule 7.14     Subsidiaries and Partnerships
Schedule 7.17     Environmental Matters
Schedule 7.19     Insurance
Schedule 7.20     Hedging Agreements
Schedule 9.01     Debt
Schedule 9.02     Liens
Schedule 9.03     Investments, Loans and Advances
Schedule 9.16     Transactions with Affiliates




* Omitted Exhibits and Schedules will be furnished to the Securities and
Exchange Commission, supplementally, if requested.


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