BARRETT RESOURCES CORP
S-3/A, 1997-02-10
CRUDE PETROLEUM & NATURAL GAS
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<PAGE>
 
   
AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON FEBRUARY 10, 1997     
 
                                                     REGISTRATION NO. 333-19363
 
================================================================================
 
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549
 
                               ----------------
                               
                            AMENDMENT NO. 2 TO     
                                   FORM S-3
                            REGISTRATION STATEMENT
                                     UNDER
                          THE SECURITIES ACT OF 1933
 
                               ----------------
 
                         BARRETT RESOURCES CORPORATION
            (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
               DELAWARE                              84-0832476
    (STATE OR OTHER JURISDICTION OF     (I.R.S. EMPLOYER IDENTIFICATION NO.)
    INCORPORATION OR ORGANIZATION)
 
                   1515 ARAPAHOE STREET, TOWER 3, SUITE 1000
                            DENVER, COLORADO 80202
                                (303) 572-3900
  (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE,OF
                   REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
 
     EUGENE A. LANG, JR., ESQUIRE, SENIOR VICE PRESIDENT--GENERAL COUNSEL
                         BARRETT RESOURCES CORPORATION
                   1515 ARAPAHOE STREET, TOWER 3, SUITE 1000
                            DENVER, COLORADO 80202
                                (303) 572-3900
(NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE,
                             OF AGENT FOR SERVICE)
 
                                  COPIES TO:
 
ALAN L. TALESNICK, ESQUIRE MICHAEL P. FINCH, ESQUIRE  MARK ZVONKOVIC, ESQUIRE
FRANCIS B. BARRON, ESQUIRE  VINSON & ELKINS L.L.P.   CHRISTINE B. LAFOLLETTE,
    BEARMAN TALESNICK &      2300 FIRST CITY TOWER            ESQUIRE
          CLOWDUS                 1001 FANNIN         ANDREWS & KURTH L.L.P.
 PROFESSIONAL CORPORATION       HOUSTON, TEXAS         425 LEXINGTON AVENUE
  1200 SEVENTEENTH STREET       (713) 758-2222       NEW YORK, NEW YORK 10017
  DENVER, COLORADO 80202                                  (212) 850-2800
      (303) 572-6500
 
  APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon as
practicable after effective date of Registration Statement.
 
  If the only securities being registered on this Form are being offered
pursuant to dividend or interest reinvestment plans, please check the
following box. [_]
 
  If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or
interest reinvestment plans, check the following box. [_]
 
  If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following
box and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. [_]
 
  If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [_]
 
  If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [_]
 
                               ----------------
 
  THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT
SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THE REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION
8(A), MAY DETERMINE.
 
================================================================================
<PAGE>

[LOGO OF BARRETT RESOURCES CORPORATION APPEARS HERE]
 
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A         +
+REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE   +
+SECURITIES AND EXCHANGE COMMISSION BUT HAS NOT YET BECOME EFFECTIVE. THESE    +
+SECURITIES MAY NOT BE SOLD NOR MAY OFFERS TO BUY BE ACCEPTED PRIOR TO THE     +
+TIME THE REGISTRATION STATEMENT BECOMES EFFECTIVE. THIS PROSPECTUS SHALL NOT  +
+CONSTITUTE AN OFFER TO SELL OR THE SOLICITATION OF AN OFFER TO BUY NOR SHALL  +
+THERE BE ANY SALE OF THESE SECURITIES IN ANY STATE IN WHICH SUCH OFFER,       +
+SOLICITATION OR SALE WOULD BE UNLAWFUL PRIOR TO REGISTRATION OR QUALIFICATION +
+UNDER THE SECURITIES LAWS OF ANY SUCH STATE.                                  +
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
                 
              SUBJECT TO COMPLETION, DATED FEBRUARY 10, 1997     
 
                                  $150,000,000
 
                         BARRETT RESOURCES CORPORATION
 
 
                            % SENIOR NOTES DUE 2007
 
                                  -----------
 
  The  % Senior Notes due 2007 of Barrett Resources Corporation will be senior
unsecured obligations of the Company and will mature on       , 2007. Interest
on the Notes is payable on      and      of each year, commencing     , 1997.
The Notes may be redeemed at any time, at the option of the Company, in whole
or in part, at a price equal to 100% of the principal amount plus accrued and
unpaid interest (if any) to the date of redemption plus a Make-Whole Premium,
if any, relating to the then prevailing Treasury Yield and the remaining life
of the Notes. The Notes will rank pari passu in right of payment with any
existing and future senior unsecured indebtedness of the Company, including
under its bank credit facility, and senior in right of payment to all existing
and future subordinated indebtedness of the Company. See "Description of
Notes."
 
  The Company will use the net proceeds of the Offering to repay in full
indebtedness under its bank credit facility, to fund a portion of its planned
exploration and development activities and for other general corporate
purposes, including possible acquisitions. See "Use of Proceeds."
 
  The Notes will be evidenced by a Global Certificate in fully registered form
without coupons, deposited with a custodian for and registered in the name of a
nominee of The Depository Trust Company. Except as described herein, beneficial
interests in the Global Certificate will be shown on, and transfers thereof
will be effected only through, records maintained by DTC and its direct and
indirect participants. See "Description of Notes." The Notes are not entitled
to any sinking fund. The Company does not intend to apply for listing of the
Notes on any securities exchange or for inclusion of the Notes in any automated
quotation system.
 
  SEE "RISK FACTORS" COMMENCING ON PAGE 9 FOR INFORMATION THAT SHOULD BE
CONSIDERED BY PROSPECTIVE INVESTORS IN CONNECTION WITH AN INVESTMENT IN THE
NOTES.
 
                                  -----------
 
THESE SECURITIES  HAVE NOT BEEN APPROVED  OR DISAPPROVED BY  THE SECURITIES AND
EXCHANGE COMMISSION  OR ANY STATE SECURITIES COMMISSION NOR HAS  THE SECURITIES
 AND EXCHANGE COMMISSION  OR ANY  STATE SECURITIES COMMISSION  PASSED UPON THE
 ACCURACY OR  ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION  TO THE CONTRARY
  IS A CRIMINAL OFFENSE.
 
                                  -----------
 
<TABLE>
<CAPTION>
                                                INITIAL PUBLIC   UNDERWRITING  PROCEEDS TO
                                               OFFERING PRICE(1) DISCOUNT(2)  COMPANY(1)(3)
                                               ----------------- ------------ -------------
<S>                                            <C>               <C>          <C>
Per Note.....................................          %               %            %
Total........................................       $               $            $
</TABLE>
- -----
(1) Plus accrued interest, if any, from      , 1997.
(2) The Company has agreed to indemnify the Underwriters against certain
    liabilities, including liabilities under the Securities Act of 1933. See
    "Underwriting."
(3) Before deducting estimated expenses of $450,000 payable by the Company.
 
                                  -----------
 
  The Notes offered hereby are offered severally by the Underwriters, as
specified herein, subject to receipt and acceptance by them and subject to
their right to reject any order in whole or in part. It is expected that the
Notes will be ready for delivery in book-entry form only through the facilities
of DTC in New York, New York, on or about      , 1997, against payment therefor
in immediately available funds.
 
GOLDMAN, SACHS & CO.
 
                 CHASE SECURITIES INC.
 
                                        LEHMAN BROTHERS
 
                                                          PETRIE PARKMAN & CO.
 
                                  -----------
 
                  The date of this Prospectus is       , 1997.
 
<PAGE>
 
                   [CORE AREAS OF ACTIVITY MAP APPEARS HERE]
 
  IN CONNECTION WITH THIS OFFERING, THE UNDERWRITERS MAY OVER-ALLOT OR EFFECT
TRANSACTIONS WHICH STABILIZE OR MAINTAIN THE MARKET PRICE OF THE NOTES OFFERED
HEREBY AT A LEVEL ABOVE THAT WHICH MIGHT OTHERWISE PREVAIL IN THE OPEN MARKET.
SUCH STABILIZING, IF COMMENCED, MAY BE DISCONTINUED AT ANY TIME.
 
 
                                       2
<PAGE>
 
 
                               PROSPECTUS SUMMARY
 
  The following summary is qualified in its entirety by the more detailed
information and financial statements appearing elsewhere in this Prospectus and
in the documents incorporated by reference into this Prospectus. As used
herein, the "Company" or "Barrett" means Barrett Resources Corporation and its
subsidiaries unless the context requires otherwise. Unless otherwise indicated,
all references to annual or quarterly periods refer to the Company's fiscal
year ending December 31. Unless otherwise indicated herein, the information in
this Prospectus includes the effects of the restatement of the Company's
financial, operating and reserve information to include Plains Petroleum
Company ("Plains") on a combined basis effective for all periods as a result of
the July 18, 1995 merger with Plains, which was accounted for as a pooling of
interests. Investors should carefully consider the information set forth under
the heading "Risk Factors." Certain terms used herein relating to the oil and
gas industry are defined in "Certain Definitions" included on pages 55 and 56
of this Prospectus.
 
                                  THE COMPANY
 
GENERAL
   
  Barrett is an independent natural gas and crude oil exploration and
production company with core areas of activity in the Rocky Mountain Region of
Colorado, Wyoming and Utah; the Mid-Continent Region of Kansas, Oklahoma, New
Mexico and Texas; and the Gulf of Mexico Region of offshore Texas and
Louisiana. At December 31, 1996, the Company's estimated proved reserves were
814.3 Bcfe (83% natural gas and 17% crude oil) with an implied reserve life of
11.3 years based on 1996 total production of 72.3 Bcfe.     
   
  The Company concentrates its activities in core areas in which it has
accumulated detailed geologic knowledge and developed significant management
expertise. The Company continues to build on its interests in the Piceance
Basin in northwestern Colorado, the Uinta Basin of northeastern Utah, the
Anadarko and Arkoma Basins in Oklahoma, the Wind River Basin in Wyoming and the
Gulf of Mexico. The Company also has significant interests in the Hugoton
Embayment in Kansas and Oklahoma, the Permian Basin in Texas and New Mexico and
the Powder River Basin in Wyoming. At December 31, 1996, these principal areas
of focus represented approximately 94% of the Company's estimated proved
reserves.     
   
  The Company continues to experience significant growth in its proved
reserves, production volumes, revenues and cash flow, particularly in the Wind
River, Piceance, Anadarko, Arkoma and Uinta Basins. The Company currently is
pursuing development projects in the Wind River, Piceance, Anadarko, Arkoma and
Uinta Basins, and exploration projects in the Wind River and Anadarko Basins,
the Gulf of Mexico and the Republic of Peru. The Company's average net daily
production increased to 198 MMcfe for the year ended December 31, 1996 from 159
MMcfe for the year ended December 31, 1995.     
 
  As of September 30, 1996, the Company owned interests in 2,124 producing
wells and operated 1,131 of these wells. These operated wells contributed
approximately 82% of Barrett's natural gas and oil production for the nine
months ended September 30, 1996. The Company also owns interests in and
operates a natural gas gathering system, a 27-mile pipeline and a natural gas
processing plant in the Piceance Basin.
 
  Barrett markets all of its own natural gas and oil production from wells that
it operates. In addition, the Company engages in natural gas trading
activities, which involve purchasing natural gas from third
 
                                       3
<PAGE>
 
parties and selling natural gas to other parties at prices and volumes that
management anticipates will result in profits to the Company. Through these
natural gas trading activities, the Company obtains knowledge and information
that enables it to more effectively market its own production. See "Business
and Properties--Natural Gas and Oil Marketing and Trading."
 
BUSINESS STRATEGY
 
  Barrett's business strategy is to generate strong growth in reserves,
production, earnings and cash flow through exploration, development and
selective acquisitions of natural gas and oil properties in its core areas of
activity. The Company implements this strategy through a series of continuing
initiatives:
 
  SPECIALIZED GEOLOGIC EXPERTISE. Both the CEO and President of Barrett are
experienced, practicing geologists. They have established a team of geologists
and geophysicists with expertise in the Company's core areas of activity. Prior
to undertaking projects in new areas, the Company assembles specialized
geologic expertise to identify and evaluate drilling prospects.
 
  ACTIVE DRILLING PROGRAM. Barrett maintains a high quality, balanced portfolio
of lower risk development projects complemented by higher potential exploration
prospects. The Company's preliminary 1997 capital expenditure budget is $278
million, approximately 75% of which is allocated to drilling and production
activities. This budget, which is subject to revision based upon market
conditions and other factors, contemplates that the Company will participate in
drilling approximately 290 gross wells in 1997 as compared with 196 gross wells
drilled in 1996. The Company expects to continue high levels of drilling
activity after 1997.
 
  ADVANCED TECHNOLOGY. The Company makes extensive use of advanced
technologies, including 3-D seismic and in-house analytical and processing
capabilities, to better define drilling prospects. The Company also uses
advanced production techniques, such as alkaline surfactant polymer ("ASP")
technology, in its enhanced recovery operations.
 
  OPERATING CORE PROPERTIES. At September 30, 1996, Barrett served as operator
for 1,131 wells, which contributed approximately 82% of the Company's
production during the nine months ended September 30, 1996. As operator, the
Company coordinates drilling activities and arranges for the production,
gathering and sale of its natural gas and oil from operated wells. Serving as
operator enables the Company to exert greater control over the cost and timing
of its exploration, development and production activities.
 
  CONTINUING COST MANAGEMENT. The Company continually strives to reduce
expenses through implementation of cost control programs and active management
of its operations, personnel and administrative activities. Current cost
management initiatives include entering into multi-well and longer term
contracts with drilling companies and participating in alliances with oil field
service companies to obtain more favorable terms.
 
  FINANCIAL STRENGTH. The Company is committed to maintaining financial
flexibility in order to pursue exploration and development activities and to
take advantage of other opportunities that may arise. Historically, the Company
has funded its growth primarily through the issuance of common stock, including
four public stock offerings, its 1995 stock-for-stock merger with Plains and
several recent acquisitions financed with common stock. The issuance of the
Notes offered hereby (the "Notes") adds ten-year fixed rate debt financing to
the Company's capital structure, which will improve Barrett's liquidity,
diversify its capital base and enhance the Company's ability to pursue its
business strategy.
 
  SELECTIVE RESERVE AND LEASEHOLD ACQUISITIONS. From time to time the Company
seeks to augment activities in its core areas, establish operations in new
areas and build acreage positions for
 
                                       4
<PAGE>
 
exploration prospects through selective acquisitions. As a result of
acquisitions completed during 1996, the Company increased its working interests
in the Piceance Basin, expanded its operations in the Uinta Basin and
substantially increased its leased acreage position in the Gulf of Mexico.
 
RECENT DEVELOPMENTS
       
  CAPITAL EXPENDITURES. The Company's preliminary 1997 capital expenditure
budget for natural gas and oil activities is $278 million. Total estimated 1997
expenditures are allocated approximately 41% to the Gulf of Mexico Region, 25%
to the Rocky Mountain Region, 19% to the Mid-Continent Region, 6% to
international activities and 9% to possible acquisitions. This budget is
subject to revision based upon market conditions and other factors. See
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" and "Business and Properties--Core Areas of Activities."
 
  OFFSHORE FEDERAL LEASE SALES. At the September 1996 Western Gulf of Mexico
Offshore Lease Sale, the Company significantly expanded its position in the
Gulf of Mexico. The Minerals Management Service ("MMS") awarded the Company
leases covering 17 blocks. The Company has a 100% working interest in 14 of
these blocks and a 50% working interest in the three other blocks. The
Company's net share of the bonus payments for these leases was $34.4 million.
As a result of these transactions, Barrett holds interests in 46 lease blocks
in the Gulf of Mexico covering approximately 185,000 gross acres. See "Business
and Properties--Core Areas of Activity--Gulf of Mexico Region."
 
  UINTA BASIN ACQUISITIONS. In November 1996, the Company expanded its
operations in the Uinta Basin of northeastern Utah when it acquired producing
and non-producing natural gas and oil properties in the Altamont-Bluebell
Field. The effective date of the acquisition of a significant portion of these
properties is January 1, 1997. The purchase included 120 operated wells with an
average working interest of 80%, together with 100,000 gross and 72,000 net
acres of leasehold interests. The total purchase price was approximately $32
million, including approximately $14 million in cash, 50,000 shares of the
Company's common stock, and certain non-strategic producing properties owned by
the Company. In January 1997, the Company acquired additional interests in the
Altamont-Bluebell Field for an aggregate purchase price of $3.5 million in
cash. These interests consist of 16 non-operated wells with average working
interests of 42% together with approximately 10,000 gross and 4,600 net acres
of leasehold interests. See "Business and Properties--Core Areas of Activity--
Rocky Mountain Region--Uinta Basin."
   
  PARTICIPATION IN MARANON BASIN, PERU. In late January 1997, the Company
entered into an agreement with industry partners that provided the Company with
a license covering approximately 2.0 million gross acres located in the Maranon
Basin of northeastern Peru. The Company and its partners intend to acquire and
analyze 200 to 250 miles of seismic data in preparation for exploratory
drilling to begin in late 1997 or early 1998. The Company's participation,
which is subject to approval of the government of Peru, is intended to consist
of a 45% working interest, subject to a cost commitment of 60% of the 1996 and
1997 seismic costs and 60% of the cost of up to three exploratory wells. It is
anticipated that the Company will be designated operator for operations in this
area in mid-1997. See "Business and Properties--Core Areas of Activity--
International Operations."     
 
 
                                       5
<PAGE>
 
 
                                  THE OFFERING
 
<TABLE>   
<S>                     <C>
Issuer                  Barrett Resources Corporation.
Securities Offered      $150,000,000 principal amount of   % Senior Notes due
                        2007.
Maturity Date              , 2007.
Interest Payment Dates       and      of each year, beginning on      , 1997.
Optional Redemption     The Notes may be redeemed at any time, at the option of
                        the Company, in whole or in part, at a price equal to
                        100% of the principal amount plus accrued and unpaid
                        interest (if any) to the date of redemption plus a Make-
                        Whole Premium (if any) relating to the then prevailing
                        Treasury Yield and the remaining life of the Notes.
Mandatory Redemption    None.
Ranking                 The Notes will be senior unsecured obligations of the
                        Company and will rank pari passu in right of payment with
                        any existing and future senior unsecured indebtedness of
                        the Company, including under its bank credit facility,
                        and senior in right of payment to all existing and future
                        subordinated indebtedness of the Company.
Certain Covenants       The indenture (the "Indenture") relating to the Notes
                        will contain limitations on, among other things, the
                        Company's ability to (i) incur indebtedness secured by
                        certain liens, (ii) engage in certain sale/leaseback
                        transactions, and (iii) engage in certain merger,
                        consolidation or reorganization transactions. See
                        "Description of Notes."
Use of Proceeds         The net proceeds from the offering of the Notes will be
                        used to repay in full indebtedness under the Company's
                        bank credit facility ($70 million outstanding as of
                        December 31, 1996 and $85 million outstanding as of
                        February 7, 1997), to fund a portion of the Company's
                        planned exploration and development activities and for
                        other general corporate purposes, including possible
                        acquisitions. See "Use of Proceeds."
</TABLE>    
 
 
                                       6
<PAGE>
 
 
          SELECTED CONSOLIDATED FINANCIAL, RESERVE AND OPERATING DATA
 
  The following table sets forth the selected historical consolidated
financial, reserve and operating data of Barrett for each of the periods
indicated. The historical financial data of Barrett for the three-year period
ended December 31, 1995 have been derived from Barrett's audited consolidated
financial statements. The historical financial data for the nine months ended
September 30, 1995 and 1996 are derived from unaudited financial statements of
the Company. Production data for all periods are unaudited. Barrett's
previously reported data for 1995 and prior years have been restated to reflect
the merger with Plains under the pooling of interests method of accounting and
the change in fiscal year end from September 30 to December 31. The selected
consolidated financial, reserve and operating data set forth below should be
read in conjunction with "Management's Discussion and Analysis of Financial
Condition and Results of Operations" and the Consolidated Financial Statements
and notes thereto and other information included elsewhere in this Prospectus
and the documents incorporated herein by reference.
 
<TABLE>   
<CAPTION>
                                     YEAR ENDED DECEMBER     NINE MONTHS ENDED
                                             31,               SEPTEMBER 30,
                                    -----------------------  -------------------
                                     1993    1994   1995(1)   1995(1)     1996
                                    ------  ------  -------  ---------- --------
                                                                (UNAUDITED)
                                             (DOLLARS IN MILLIONS,
                                     EXCEPT PER SHARE AND SALES PRICE DATA)
<S>                                 <C>     <C>     <C>      <C>        <C>
INCOME STATEMENT DATA (2):
 Revenues.......................... $106.1  $109.5  $128.0   $   92.7   $  136.1
 Depreciation, depletion and
  amortization.....................   20.2    22.8    33.5       23.6       31.9
 Interest expense(3)...............    0.7     0.9     4.6        3.3        3.2
 Income (loss) before income taxes
  and cumulative effect of change
  in method of accounting for
  postretirement benefits..........   21.0    16.4    (0.4)      (3.1)      27.4
 Net income (loss).................   13.7    11.3    (2.2)      (5.9)      17.0
 Net income (loss) per share.......   0.55    0.46   (0.09)     (0.23)      0.62
CASH FLOW STATEMENT DATA:
 Cash flow from operations before
  changes in working capital....... $ 40.5  $ 39.0  $ 33.4   $   19.5   $   57.5
 Cash flow from operations after
  changes in working capital.......   41.6    36.6    35.5       16.5       62.7
 Cash flow used in investing
  activities.......................   33.2    91.0    82.3       46.7      122.1
 Cash flow provided by financing
  activities.......................   11.2    37.2    41.9       36.5       61.3
OTHER FINANCIAL DATA:
 EBITDA(4)......................... $ 41.2  $ 39.3  $ 37.0   $   23.3   $   61.7
 Additions to property, plant and
  equipment........................   45.5    95.6    82.8       46.9      124.1
 EBITDA/Interest expense(5)........   56.9x   37.1x    7.3x       6.4x      19.5x
 Ratio of earnings to fixed
  charges(6).......................   20.3x   12.2x    0.9x       0.1x       8.8x
RESERVE AND OPERATING DATA:
 Estimated proved reserves(7)
  Natural gas (Bcf)................  364.8   458.8   513.5        --         --
  Oil and condensate (MMBbls)......    6.9    11.4    13.0        --         --
   Total (Bcfe)....................  406.5   527.5   591.3        --         --
 Present value of estimated future
  net revenues before future income
  taxes discounted at 10%(7)(8).... $277.6  $322.7  $432.6        --         --
 Standardized measure of discounted
  net cash flows (9)............... $203.1  $242.6  $309.9        --         --
 Production
  Natural gas (Bcf)................   31.7    33.3    47.7       33.9       44.1
  Oil and condensate (MMBbls)......    1.3     1.3     1.7        1.3        1.4
   Total (Bcfe)(7).................   39.5    41.0    57.9       41.7       52.5
 Reserves to production ratio
  (years)(7).......................   10.3    12.9    10.2        --         --
 Average sales price
  Natural gas ($/Mcf).............. $ 1.94  $ 1.83  $ 1.47   $   1.48   $   1.73
  Oil and condensate ($/Bbl).......  14.93   13.95   15.76      15.84      18.61
</TABLE>    
 
 
                                       7
<PAGE>
 
<TABLE>   
<CAPTION>
                                                                  AS OF
                                     AS OF DECEMBER 31,    SEPTEMBER 30, 1996
                                     ------------------- -----------------------
                                       1994      1995    ACTUAL AS ADJUSTED (10)
                                     --------- --------- ------ ----------------
                                                               (UNAUDITED)
                                                    (IN MILLIONS)
<S>                                  <C>       <C>       <C>    <C>
BALANCE SHEET DATA:
 Cash and cash equivalents.......... $    12.3 $     7.5 $  9.4     $ 144.0
 Working capital....................       2.5       3.7    2.0       136.6
 Total assets.......................     311.0     340.4  472.1       610.1
 Total debt.........................      53.0      89.0   12.0       150.0
 Stockholders' equity...............     188.1     191.8  363.6       363.6
 Total capitalization(11)...........     241.1     280.8  375.6       513.6
</TABLE>    
- --------
(1) Excluding 1995 nonrecurring transaction costs relating to the Plains merger
    totaling $14.2 million ($13.2 million for the nine months ended September
    30, 1995), net income (loss) for the year ended December 31, 1995 and the
    nine months ended September 30, 1995 would be $9.5 million and $7.0
    million, respectively, EBITDA would be $51.2 million and $36.5 million,
    respectively, and cash flow from operations before changes in working
    capital would be $47.6 million and $32.7 million, respectively. EBITDA and
    cash flow from operations before changes in working capital are not
    measures determined pursuant to generally accepted accounting principles
    ("GAAP") nor are they alternatives to GAAP income or cash flow provided by
    operations. See "Management's Discussion and Analysis of Financial
    Condition and Results of Operations."
(2) Plains used the successful efforts method of accounting and adopted the
    full cost method used by Barrett in the retroactively restated financial
    statements. See Note 2 to the Consolidated Financial Statements.
(3) Interest expense is net of capitalized interest of $0, $0.1 million and
    $0.4 million for the years ended December 31, 1993, 1994 and 1995,
    respectively, and $0.3 million and $0, for the nine months ended September
    30, 1995 and 1996, respectively. On a pro forma basis, assuming the sale of
    the Notes and the application of a portion of the net proceeds therefrom to
    repay $70 million under the bank credit facility at the beginning of each
    period, interest expense would be $12.5 million for the year ended
    December 31, 1995 and $9.4 million for the nine months ended September 30,
    1996.
(4) EBITDA is defined as income before income taxes less interest income, plus
    interest expense, plus depreciation, depletion and amortization expense.
    EBITDA does not purport to reflect any measure of operations or cash flow.
(5) Represents the ratio of EBITDA to interest expense. On a pro forma basis,
    assuming the sale of the Notes and the application of a portion of the net
    proceeds therefrom to repay $70 million under the bank credit facility at
    the beginning of each period, and excluding the nonrecurring 1995 merger
    costs, EBITDA/Interest expense would be 4.0x for the year ended December
    31, 1995 and 6.6x for the nine months ended September 30, 1996.
(6) For purposes of determining the ratio of earnings to fixed charges,
    earnings are computed as net income (loss) before income taxes, plus fixed
    charges. Fixed charges consist of interest expense, whether expensed or
    capitalized, on all indebtedness plus amortization of debt issuance costs.
    For the year ended December 31, 1995 and the nine months ended September
    30, 1995, earnings were not sufficient to cover historical fixed charges
    due to the incurrence of $14.2 million of nonrecurring merger costs ($13.2
    million for the nine months ended September 30, 1995). On a pro forma
    basis, assuming the sale of the Notes and the application of a portion of
    the net proceeds therefrom to repay $70 million under the bank credit
    facility at the beginning of each period, and excluding the nonrecurring
    1995 merger costs, the ratio of earnings to fixed charges would be 1.6x for
    the year ended December 31, 1995 and 3.4x for the nine months ended
    September 30, 1996.
   
(7) At December 31, 1996, the Company's estimated proved reserves were 674.9
    Bcf of natural gas and 23.2 MMBbls of oil and condensate, for a total of
    814.3 Bcfe with an implied reserve life of 11.3 years based on 1996 total
    production of 72.3 Bcfe. At December 31, 1996, the Present value of
    estimated future net revenues on a non-escalated basis was $1,121.5 million
    based on weighted average prices realized by the Company of $3.46 per Mcf
    of natural gas and $24.12 per Bbl of oil at December 31, 1996.     
   
(8) The Present value of estimated future net revenues on a non-escalated basis
    is based on weighted average prices realized by the Company of $1.95 per
    Mcf of natural gas and $11.05 per Bbl of oil at December 31, 1993, $1.67
    per Mcf of natural gas and $14.43 per Bbl of oil at December 31, 1994 and
    $1.77 per Mcf of natural gas and $17.35 per Bbl of oil at December 31,
    1995.     
   
(9) The Standardized measure of discounted net cash flows prepared by the
    Company represents the Present value of estimated future net revenues after
    income taxes discounted at 10%.     
   
(10) As adjusted to give effect to the issuance and sale of the $150,000,000
     principal amount of the Notes and the application of net proceeds
     therefrom. See "Use of Proceeds" and "Management's Discussion and Analysis
     of Financial Condition and Results of Operations."     
   
(11) The sum of total debt and stockholders' equity.     
 
                                       8
<PAGE>
 
                                 RISK FACTORS
 
  In addition to the other information contained in this Prospectus, including
but not limited to information under the heading "Disclosure Regarding
Forward-Looking Statements," the following risk factors should be considered
when evaluating an investment in the Notes offered hereby:
 
VOLATILITY OF PRICES AND AVAILABILITY OF MARKETS
   
  The Company's revenues, profitability and future rate of growth are
dependent in part upon prevailing prices for natural gas and oil, which can be
extremely volatile. There can be no assurance that current price levels can be
sustained. Prices also are affected by actions of state and local agencies,
the United States and foreign governments, and international cartels. These
external factors and the volatile nature of the energy markets make it
difficult to estimate future prices of natural gas and oil. Any substantial or
extended decline in the price of natural gas would have a material adverse
effect on the Company's financial condition and results of operations,
including reduced cash flow and borrowing capacity. All of these factors are
beyond the control of the Company. The marketability of the Company's
production depends in part upon the availability, proximity and capacity of
natural gas gathering systems, pipelines and processing facilities. Federal
and state regulation of natural gas and oil production and transportation,
general economic conditions, changes in supply and changes in demand all could
adversely affect the Company's ability to produce and market its natural gas
and oil. If market factors were to change dramatically, the financial impact
on the Company could be substantial. For the year ended December 31, 1995, the
Company's production and reserve base were approximately 82% and 87% natural
gas, respectively, on an energy equivalent basis. For the year ended December
31, 1996, the Company's production and reserve base were approximately 84% and
83% natural gas, respectively, on an energy equivalent basis. As a result, the
Company's earnings and cash flow are more sensitive to fluctuations in the
price of natural gas than to fluctuations in the price of oil. See
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" and "Business and Properties--Natural Gas and Oil Marketing and
Trading."     
 
  The Company engages in hedging activities with respect to some of its
natural gas and oil production through a variety of financial arrangements
designed to protect against price declines, including swaps. To the extent
that Barrett engages in such activities, it may be prevented from realizing
the benefits of price increases above the levels of the hedges. Risks related
to hedging activities include the risk that counterparties to hedge
transactions will default on obligations to the Company. The Company maintains
a Risk Management Committee to oversee its production hedging and trading
activities. See "Management's Discussion and Analysis of Financial Condition
and Results of Operations" and "Business and Properties--Natural Gas and Oil
Marketing and Trading."
 
  The Company reports its operations using the full cost method of accounting
for natural gas and oil properties. Under full cost accounting rules, the net
capitalized costs of natural gas and oil properties may not exceed a "ceiling"
limit of the present value of estimated future net revenues from proved
reserves, discounted at 10%, plus the lower of cost or fair market value of
unproved properties. This rule requires calculating future revenues at
unescalated prices in effect as of the end of each fiscal quarter and requires
a write-down if the net capitalized costs of the natural gas and oil
properties exceed the ceiling limit, even if price declines are temporary. The
risk that the Company will be required to write-down the carrying value of its
natural gas and oil properties increases when natural gas and oil prices are
depressed or unusually volatile. A ceiling limitation write-down is a one-time
charge to earnings, which does not impact cash flow from operating activities.
 
OTHER INDUSTRY AND BUSINESS RISKS
 
  The Company competes in the areas of natural gas and oil exploration,
production, development and transportation with other companies, many of which
may have substantially greater financial and other resources. The nature of
the natural gas and oil business also involves a variety of risks,
 
                                       9
<PAGE>
 
including the risks of operating hazards such as fires, explosions, cratering,
blow-outs, encountering formations with abnormal pressures and, in horizontal
wellbores, the increased risk of mechanical failure and collapsed holes, and
damage or loss from adverse weather and seas, the occurrence of any of which
could result in losses to the Company. The operation of the Company's natural
gas processing plant and its natural gas gathering systems involves certain
risks, including explosions and environmental hazards caused by pipeline leaks
and ruptures. The effect of these hazards are increased with respect to the
Company's Gulf of Mexico activities due to the difficulty of containing leaks
and ruptures in offshore locations as well as hazards inherent in marine
operations, such as capsizing, grounding, collision and damage from weather or
sea conditions or unsound location. In accordance with customary industry
practices, the Company maintains insurance against some, but not all, of these
risks in amounts that management believes to be reasonable. The occurrence of
a significant event that is not fully insured could have a material adverse
effect on the Company's financial position. International operations are
subject to certain risks, including expropriation of assets, governmental
changes in applicable law, policies and contract terms, foreign government
approvals, political instability, guerilla activity, payment delays, and
currency exchange and repatriation losses.
 
  The Company's revenues depend on its level of success in acquiring or
finding additional reserves. Certain areas in which the Company is engaged in,
or planning, significant exploration and development activities are
experiencing increased activity by other companies. This may result in
shortages of, or delays in the availability of, drilling rigs and other
equipment and increased costs as more users pursue available rigs. Except to
the extent that the Company acquires properties containing proved reserves or
conducts successful exploration and development activities, or both, the
proved reserves of the Company will decline as reserves are produced. There
can be no assurance that the Company's planned exploration and development
projects will result in additional reserves or that the Company will have
future success in drilling productive wells.
 
  Natural gas trading activities involve a high degree of risk because of the
inherent uncertainties associated with the natural gas trading process. These
uncertainties include the lack of predictability in natural gas prices, risk
of non-performance by counterparties, market imperfections caused by regional
price differentials, possible lack of liquidity in the trading markets and
possible failure of physical delivery. Although the possibility of lower
natural gas prices tends to add risk to the Company's exploration and
development activities, it is the possibility of unexpected price volatility
that represents a primary risk for the Company's natural gas trading
activities. In addition, natural gas trading is highly competitive and the
Company competes with several other companies, many of which have more
experience, personnel and other resources available to them. However, the
Company does not believe that any one competitor is dominant in the industry.
See "Management's Discussion and Analysis of Financial Condition and Results
of Operations" and "Business and Properties--Natural Gas and Oil Marketing and
Trading."
 
ENGINEERS' ESTIMATES OF RESERVES AND FUTURE NET REVENUES
   
  This Prospectus contains estimates of reserves and of future net revenues
which have been prepared by the Company and have been reviewed by independent
petroleum engineers. However, petroleum engineering is not an exact science
and involves estimates based on many variable and uncertain factors. Estimates
of reserves and of future net revenues prepared by different petroleum
engineers may vary substantially depending, in part, on the assumptions made
and may be subject to adjustment either up or down in the future. The actual
amounts of production, revenues, taxes, development expenditures, operating
expenses, and quantities of recoverable natural gas and oil reserves to be
encountered may vary substantially from the engineers' estimates. Estimates of
reserves also are extremely sensitive to the market prices for natural gas and
oil. See "Management's Discussion and Analysis of Financial Condition and
Results of Operations" and "Business and Properties--Reserves."     
 
                                      10
<PAGE>
 
FUTURE CAPITAL NEEDS
 
  The Indenture under which the Notes will be issued restricts the Company's
ability to grant liens. However, the Company will be able to incur substantial
amounts of additional debt. Existing and possible future leverage of the
Company poses risks to the holders of the Notes. These risks include higher
interest rates on floating rate debt and the risk that the Company might not
be able to generate sufficient cash to service or repay the Notes and its
other existing and possible future debt and to adequately fund its capital
expenditures. Existing and possible future leverage also may reduce the
ability of the Company to respond to changing business and economic
conditions, particularly the ability to make capital expenditures or to
withstand competitive pressures.
 
GOVERNMENT REGULATION AND ENVIRONMENTAL RISKS
 
  The production and sale of natural gas and oil are subject to a variety of
federal, state and local government regulations that may be changed from time
to time in response to economic or political conditions. The regulations
concern, among other matters, the prevention of waste, the discharge of
materials into the environment, the conservation of natural gas and oil,
pollution, permits for drilling operations, drilling bonds, reports concerning
operations, the spacing of wells, the unitization and pooling of properties,
and various other matters including taxes. The Company currently has a dispute
with the Internal Revenue Service. Although the Company believes it will
prevail in its position, there can be no assurance of a favorable outcome. See
Note 11 to the Consolidated Financial Statements. Many jurisdictions have at
various times imposed limitations on the production of natural gas and oil by
restricting the rate of flow for natural gas and oil wells below their actual
capacity to produce. In addition, many states have raised state taxes on
energy sources and additional increases may occur, although there can be no
certainty of the effect that increases in state energy taxes would have on
natural gas and oil prices. Although the Company believes it is in substantial
compliance with applicable environmental and other government laws and
regulations and to date such compliance has not had a material adverse effect
on the earnings or competitive position of the Company, there can be no
assurance that significant costs for compliance will not be incurred in the
future. Compliance with environmental laws, including the preparation of
environmental assessments and impact statements, can delay drilling activity,
thereby potentially reducing revenue and cash flow. See "Business and
Properties--Core Areas of Activity--Rocky Mountain Region--Wind River Project"
and "--Government Regulation of the Oil and Gas Industry."
 
 
                                      11
<PAGE>
 
                                USE OF PROCEEDS
   
  The net proceeds to the Company from the sale of the Notes are estimated to
be $146.6 million after deducting underwriting discounts and estimated
offering expenses payable by the Company. The Company intends to use these net
proceeds to repay the outstanding balance on its bank credit facility, which
had $85 million outstanding as of February 7, 1997 at an average interest rate
of 6.11%. The remainder of the net proceeds will be used to fund a portion of
the Company's planned exploration and development activities and for other
general corporate purposes, including possible acquisitions. See
"Capitalization," "Management's Discussion and Analysis of Financial Condition
and Results of Operations--Liquidity and Capital Resources," and "Business and
Properties--Core Areas of Activity."     
 
  The estimated amounts and uses set forth above indicate the Company's
intentions for use of the net proceeds from the sale of the Notes. The Company
may reallocate the proceeds or utilize the proceeds for other natural gas and
oil opportunities the Company deems to be in its best interests, due to a
change in circumstances concerning matters such as economic conditions,
availability of additional debt financing or the existence of a property
acquisition or development opportunity.
 
  The excess of net proceeds from the Offering after paying the outstanding
balance of the Company's bank credit facility will be placed temporarily in
certificates of deposit, short-term obligations of the United States
government, or other money-market instruments that are rated investment grade
or its equivalent until used for the purposes described above.
 
  To date, funds borrowed under the Company's bank credit facility, which
matures on October 31, 2000, have been used primarily for the Company's
natural gas and oil activities. Texas Commerce Bank is a lending agent under
the Company's bank credit facility and is affiliated with Chase Securities
Inc., one of the Underwriters of the Offering. See "Underwriting."
 
                                      12
<PAGE>
 
                                 CAPITALIZATION
 
  The following table sets forth the capitalization of the Company as of
September 30, 1996 and as adjusted to give effect to the sale of the Notes as
of such date and the application of the net proceeds therefrom (assumed to be
approximately $146.6 million) as described under "Use of Proceeds." This table
should be read in conjunction with "Selected Consolidated Financial, Reserve
and Operating Data," "Use of Proceeds," "Management's Discussion and Analysis
of Financial Condition and Results of Operations" and the Consolidated
Financial Statements and notes thereto and other information included elsewhere
in this Prospectus.
 
<TABLE>
<CAPTION>
                                                           SEPTEMBER 30, 1996
                                                           --------------------
                                                           ACTUAL   AS ADJUSTED
                                                           -------  -----------
                                                              (IN MILLIONS)
<S>                                                        <C>      <C>
Cash and cash equivalents................................. $   9.4    $ 144.0
                                                           =======    =======
Debt:
  Bank credit facility(1)................................. $  12.0    $   --
  Notes offered hereby....................................     --       150.0
                                                           -------    -------
    Total debt............................................ $  12.0    $ 150.0
Stockholders' equity:
  Common stock, $.01 par value: 35,000,000 shares autho-
   rized, 31,319,193 issued and outstanding(2)............     0.3        0.3
  Additional paid-in capital..............................   241.4      241.4
  Retained earnings.......................................   122.8      122.8
  Treasury stock, at cost.................................    (1.0)      (1.0)
                                                           -------    -------
    Total stockholders' equity............................ $ 363.6    $ 363.6
                                                           -------    -------
    Total capitalization.................................. $ 375.6    $ 513.6
                                                           =======    =======
</TABLE>
- --------
   
(1) As of December 31, 1996, the outstanding balance under the Company's bank
    credit facility was $70 million with interest at the average rate of 6.51%
    per annum, and as of February 7, 1997 the outstanding balance was $85
    million with interest at the average rate of 6.11% per annum. See "Use of
    Proceeds," "Management's Discussion and Analysis of Financial Condition and
    Results of Operations--Liquidity and Capital Resources" and Note 6 to
    Consolidated Financial Statements for certain terms of the Company's bank
    credit facility.     
 
(2) Does not include 1,338,892 shares of common stock issuable upon exercise of
    outstanding stock options.
 
 
                                       13
<PAGE>
 
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
  On July 18, 1995, the Company consummated the merger of a wholly owned
subsidiary of the Company with Plains by issuing 12.8 million shares of its
common stock to the former Plains stockholders. As a result of this merger,
Plains became a wholly owned subsidiary of the Company. Also on July 18, 1995,
the Company changed its fiscal year end from September 30 to December 31. The
merger was accounted for using the pooling of interests method. The pooling of
interests method combines previously reported results as though the
combination had occurred at the beginning of the periods being presented.
Merger costs have been expensed during the 1995 year. The financial statements
of the Company and Plains for 1993 through 1995 have been restated and
adjusted for the merger with Plains and the change in fiscal year end. Due to
this restatement, these financial statements are not comparable to the
financial statements for the same periods as previously presented by the
Company or Plains. The following discussion should be read in conjunction with
the Consolidated Financial Statements and Notes thereto presented elsewhere in
this Prospectus.
 
LIQUIDITY AND CAPITAL RESOURCES
   
  Capital Expenditures. Capital expenditures were $156 million for the nine
months ended September 30, 1996 as compared to $47 million for the nine months
ended September 30, 1995. Full year 1996 capital expenditures were
approximately $235 million and the preliminary capital expenditure budget for
1997 is $278 million.     
 
  Capital Sources. The Company's drilling activities and its acquisitions have
increased its reserve base and its productive capacity and, therefore, its
potential cash flow. The Company anticipates that funds available from the
Company's operations, the Notes offered hereby and borrowings under the
Company's bank credit facility will be sufficient to fund the capital
expenditures described above. At September 30, 1996, the Company had cash and
short-term investments of $9.4 million, working capital of $2.0 million,
property and equipment of $422.2 million and total assets of $472.1 million.
Compared to December 31, 1995, cash and short-term investments increased $1.9
million, working capital decreased $1.7 million and property and equipment
increased $121.5 million. Total assets increased by $131.4 million, funded by
the Company's cash flow and the issuance of 5.4 million shares of the
Company's common stock in June 1996. As of December 31, 1996, as adjusted for
the sale of the Notes and repayment of the $70 million outstanding under the
bank credit facility, the Company's cash and cash equivalents will increase by
$76.6 million.
 
  During the first nine months of 1996 and 1995, the Company generated
operating cash flow of $57.5 million and $19.5 million, respectively, before
working capital changes. After working capital changes, cash flow provided by
operations was $62.7 million and $16.5 million, respectively. Excluding merger
costs, cash flow from operations before working capital changes for the first
nine months of 1995 was $32.7 million ($29.7 million after working capital
changes).
   
  As of September 30, 1996 and December 31, 1995, respectively, the
outstanding balance under the bank credit facility was $12 million and $89
million, as compared with $53 million at December 31, 1994. The Company's bank
credit facility is an unsecured $200 million facility entered into by the
Company in July 1995 with a consortium of six banks. The amount of borrowing
base under the bank credit facility at any time is determined by the lenders
with reference to the collateral value of the Company's proved reserves and
the Company's projected cash requirements. The current borrowing base is $205
million, based on the banks' review of June 30, 1996 proved reserve
information and the Company's projected cash requirements. Upon issuance of
the Notes, representing $150 million of senior indebtedness of the Company,
the borrowing base will be reduced to $75 million. Also upon the issuance of
the Notes, the banks will cancel the guarantees of the bank credit facility by
the Company's     
 
                                      14
<PAGE>
 
   
subsidiaries, and the Company will undertake to merge or consolidate certain
of its subsidiaries, including Plains Petroleum Operating Company, into or
with the Company. At the Company's election at the time of borrowing funds,
interest begins to accrue on those funds either at the London interbank
eurodollar rate (LIBOR) plus a spread ranging from 0.5% to 1.0% (depending on
the ratio of the Company's outstanding indebtedness to its borrowing base) or
at the U.S. prime rate of interest. The Company is required to pay interest on
a quarterly basis until the entire outstanding balance matures on October 31,
2000. As of December 31, 1996, the outstanding balance under the bank credit
facility was $70 million, which was accruing interest at an average rate of
6.51% per annum. As of February 7, 1997, the outstanding balance was $85
million with interest accruing at the average rate of 6.11% per annum.     
 
  From time to time the Company uses swaps to hedge the sales price of its
natural gas and oil. In a typical swap agreement, the Company and a
counterparty will enter into an agreement whereby one party will pay a fixed
price and the other will pay an index price on a specified volume of
production during a specified period of time. Settlement is made by the
parties for the difference between the two prices at approximately the same
time as the physical transactions. The intent of hedging activities is to
reduce the volatility associated with the sales prices of the Company's
natural gas and oil production. Although hedging transactions associated with
the Company's production minimize the Company's exposure to reductions in
production revenue as a result of unfavorable price changes, these
transactions also limit the Company's ability to benefit from favorable price
changes. The Company maintains a Risk Management Committee to oversee its
production hedging and trading activities. See "Business and Properties--
Natural Gas and Oil Marketing and Trading."
 
RESULTS OF OPERATIONS
 
 NINE MONTHS ENDED SEPTEMBER 30, 1996 AS COMPARED TO NINE MONTHS ENDED
SEPTEMBER 30, 1995
 
  The following discussion of operating results is based on historical
consolidated financial information that has been restated to reflect the
merger of the Company and Plains on July 18, 1995 under the pooling of
interests method of accounting.
 
  Net income for the nine months ended September 30, 1996 was $17.0 million
($.62 per share) compared with a net loss of $5.9 million ($.23 per share) for
the 1995 period. This increase is primarily due to increased natural gas and
oil production revenue, a 17% increase in average natural gas sales prices, a
17% increase in average oil sales prices, a $1.3 million increase in gross
profit from natural gas trading and the merger costs of $13.2 million that
were incurred in the first nine months of 1995.
 
  Total revenues for the nine months ended September 30, 1996 were $136.1
million, an increase of 47% from $92.7 million for the same period in 1995.
This increase is attributable to higher production revenues and a 52% increase
in trading revenues.
 
                                      15
<PAGE>
 
  Production revenues for the nine months ended September 30, 1996 increased
45% from $70.5 million to $102.4 million. Production revenues and related
volumes and average prices during the periods presented were as follows:
 
<TABLE>
<CAPTION>
                                                              NINE MONTHS ENDED
                                                                SEPTEMBER 30,
                                                              -----------------
                                                                1996     1995
                                                              -------- --------
     <S>                                                      <C>      <C>
     Natural Gas Revenues (in millions)...................... $   76.4 $   50.1
     Natural Gas Production (Bcf)............................     44.1     33.9
     Average Price per Mcf................................... $   1.73 $   1.48
     Oil Revenues (in millions).............................. $   26.0 $   20.4
     Oil Production (MBbls)..................................    1,397    1,288
     Average Price per Barrel................................ $  18.61 $  15.84
</TABLE>
 
  Natural gas revenues increased 53% during the nine months ended September
30, 1996 as compared with the same period in 1995, principally due to a 30%
increase in production volumes and a 17% increase in average natural gas
prices.
 
  The 28% increase for the nine months ended September 30, 1996 in oil
revenues from the same period in 1995 is directly attributable to an 8%
increase in production volumes and a 17% increase in average oil prices.
 
  For the nine months ended September 30, 1996, revenues from trading were
$30.5 million compared with $20.2 million for the same period in 1995. The
associated costs of trading increased to $28.4 million from $19.4 million due
to the increase in natural gas trading volumes. Gross profit from trading was
$2.1 million and $771,000 for the respective nine months ended September 30,
1996 and 1995.
 
  To reduce its exposure to natural gas and oil price fluctuations, the
Company enters into hedging arrangements from time to time for both trading
and producing activities. During the nine months ended September 30, 1996, the
Company hedged approximately 21% of the Company's natural gas production at an
average price of $1.99 per Mcf.
   
  For the fourth quarter of 1996, the Company hedged approximately 30% of the
Company's natural gas production at an average price of $2.05 per Mcf. As of
December 31, 1996, the Company held positions to hedge approximately 8.8 Bcf
of the Company's future natural gas production at an average price of $1.87
per Mcf. In addition, during January 1997 the Company hedged an aggregate of
25.6 Bcf of natural gas production from the Rocky Mountain Region for the
five-year period from March 1998 through February 2003 at an average price of
$1.75 per Mcf and on February 10, 1997 the Company hedged an aggregate of an
additional approximately 18.2 Bcf of natural gas production from the Rocky
Mountain Region for the same period at an average price of $1.735 per Mcf.
    
  Production costs increased in the first nine months of 1996 compared to 1995
due to increases in sales and higher operating costs in the winter months in
the first quarter of 1996.
 
  Depreciation, depletion and amortization increased to $31.9 million from
$23.6 million due to a 26% increase in gas and oil equivalent production.
During the 1996 and 1995 periods, depletion, depreciation and amortization was
$.58 and $.53 per Mcfe, respectively.
 
  Interest expense for the nine months ended September 30, 1996 decreased from
$3.3 million in 1995 to $3.2 million in 1996. This decrease is attributable to
the repayment in June 1996 of the Company's debt under the bank credit
facility with proceeds from the June 1996 common stock offering.
 
  The Company's largest source of operating income is from sales of its
natural gas and oil production. Therefore, the levels of the Company's
revenues and earnings are affected by prices at
 
                                      16
<PAGE>
 
which natural gas and oil are being sold. This is particularly true with
respect to natural gas, which accounted for approximately 75% of the Company's
production revenue for the nine months ended September 30, 1996. As a result,
the Company's operating results for any prior period are not necessarily
indicative of future operating results because of the fluctuations in natural
gas and oil prices and the lack of predictability of those fluctuations as
well as changes in production levels.
 
 YEAR ENDED DECEMBER 31, 1995 AS COMPARED TO YEAR ENDED DECEMBER 31, 1994
 
  During 1995, the Company incurred a net loss of $2.2 million ($0.09 per
share) compared to net income of $11.3 million ($0.46 per share) in 1994. The
1995 results include merger and reorganization costs of $14.2 million.
Excluding these merger costs, the Company's net income after taxes would have
been $9.5 million ($0.38 per share).
 
  Revenues increased 17% from 1994 to $128.0 million, and operating expenses,
including $14.2 million of merger and reorganization costs, increased 38% to
$128.4 million. Oil and natural gas production revenue increased 23% to $97.0
million. Lease operating expenses increased $6.3 million and depreciation,
depletion and amortization increased $10.7 million.
 
  Production revenues increased $18.2 million primarily due to a 43% increase
in natural gas production to 47.7 Bcf (130.7 MMcf per day). Oil production
increased 32% to 1,702,000 barrels (4,660 barrels per day). Average natural
gas sales prices decreased 20% to $1.47 per Mcf, while average oil prices
increased 13% to $15.76 per barrel. Natural gas production accounted for 82%
of total production on an energy equivalent basis. The Hugoton Embayment and
Piceance Basin properties accounted for 37% and 14%, respectively, of total
natural gas production. The Powder River and Permian Basins accounted for 43%
and 32%, respectively, of total oil production. The decreased natural gas
sales price was due to an overall deterioration in natural gas markets during
most of the year.
 
  Lease operating expenses of $34.5 million was $0.60 per Mcfe compared to
$0.69 per Mcfe in 1994. Depreciation, depletion and amortization increased
$10.7 million primarily due to production increases. During 1995,
depreciation, depletion and amortization on natural gas and oil production was
provided at an average rate of $0.55 per Mcfe compared to an average rate of
$0.52 per Mcfe in 1994.
 
  The gross margin on trading activities was virtually unchanged from 1994 at
$943,000. Natural gas trading volumes increased 26% to 22.2 Bcf in 1995.
 
  During 1995, the Company hedged 4.9 Bcf (22%) of its natural gas trading
volumes to lock in margins on specific transactions at a cost of $2.1 million.
In addition, the Company hedged 11.0 Bcf (23%) of natural gas production for a
net gain of $417,000. The hedging gain related to production is net of $1.2
million for an expense recorded in the fourth quarter due to a lack of
correlation of the hedging instruments to the underlying commodity as of
December 31, 1995. The Company enters into the hedging arrangements to reduce
its exposure to price risks associated with commodities markets. Although
hedging transactions associated with its production minimize the Company's
exposure to reductions in production revenue as a result of unfavorable price
changes, these transactions also limit the Company's ability to benefit from
favorable price changes. At the end of December 1995, the basis differential
between the commodities markets and the market price of the Company's natural
gas widened to historically high levels. Because the increase in the
commodities price was not accompanied by a similar increase in the market
price of the Company's natural gas, the Company recorded an expense for the
difference due to the inefficient hedge and positions that did not qualify for
hedge accounting treatment. With respect to trading activities, the Company
generally will not enter into a commitment for either a purchase or a sale
unless (i) it has established a commitment for an offsetting sale or purchase,
or (ii) it has established a hedge arrangement with a counter party that
creates the same matching position.
 
                                      17
<PAGE>
 
  General and administrative expenses of $13.4 million were 1% greater than
the previous year. The 1995 amount is net of $3.8 million of operating fee
recoveries compared to a $3.4 million recovery in 1994. General and
administrative expense in 1995 is generally a combination of the separate
companies' expenses, because the integration of the two entities did not occur
until late in the year and included costs for the Company to expand its
business in existing and new activity areas. The Company expects to eliminate
duplicative costs in 1996. Interest expense increased significantly from $0.9
million in 1994 to $4.6 million in 1995 as the Company financed a portion of
its growth with bank debt. The Company incurred a 1995 expense of $14.2
million to combine Barrett and Plains and to integrate the separate companies'
operations. The costs consist primarily of $7.4 million of investment banker
and other professional fees to evaluate and consummate the merger and $5.6
million for employee termination and benefit costs. See "Underwriting."
 
  During 1995, the Company recorded a $1.8 million income tax expense even
though it incurred a loss before taxes due to non-deductible merger costs.
Excluding non-deductible merger costs, the Company would have had a $600,000
tax benefit.
 
  The Company's results of operations depend primarily on the production of
natural gas which accounted for 87% of the Company's reserves and 82% of its
production during 1995. Therefore, the Company's future results will depend on
both the volume of natural gas production and the sales price for gas. The
Company continues to explore for natural gas and oil to increase its
production. The lack of predictability of both production volumes and sales
prices may influence future operating results.
 
 YEAR ENDED DECEMBER 31, 1994 AS COMPARED TO YEAR ENDED DECEMBER 31, 1993
 
  During 1994, the Company earned net income of $11.3 million ($0.46 per
share) compared to net income of $13.7 million ($0.55 per share) in 1993. The
1994 results include a tax benefit of $2.1 million due to an increase in
financial reporting value of the Company's net operating loss carryover.
Without the tax benefit from the net operating loss carryover, the Company's
net income after taxes in 1994 would have been $9.2 million ($0.37 per share).
The 1993 results include a tax benefit of $1.5 million from the value of the
tax loss carryover and an expense of $656,000 for the cumulative effect of
adopting Statement No. 106 of the Financial Accounting Standards Board to
recognize accumulated postretirement benefit liabilities as of January 1,
1993. Net income before income taxes and the cumulative effect of the change
in accounting method was $16.4 million in 1994 compared to $21.0 million in
1993.
 
  Revenues increased 3% from 1993 to $109.5 million, and operating expenses
increased 9% to $93.0 million. Production revenue decreased $2.1 million, and
trading revenues increased $5.2 million. These changes were offset by a
decrease of $2.2 million in lease operating expenses, an increase of $2.6
million in depreciation, depletion and amortization and an increase of $5.5
million in the cost of trading.
 
  Production revenues decreased $2.1 million as a 5% increase in gas
production was offset by a 6% decrease in the average natural gas sales price
and a 7% decline in the average oil sales price. Oil production was virtually
unchanged from 1993 to 1994. During 1994, the Company produced 91.2 MMcf of
natural gas per day and 3.5 MBbls of oil per day. Natural gas production
accounted for 81% of total production on an energy equivalent basis of 41.0
Bcfe. During 1994, the average natural gas sales price was $1.83 per Mcf
($1.94 in 1993) and the average oil sales price was $13.95 per barrel ($14.93
in 1993). The decreased natural gas and oil sales prices were due to an
overall market reduction in the commodity prices of the products.
 
  Lease operating expenses of $28.2 million averaged $0.69 per Mcfe compared
with $0.77 per Mcfe in 1993. Depreciation, depletion and amortization
increased $2.6 million primarily due to production increases. During 1994,
depreciation, depletion and amortization was $0.52 per Mcfe compared to $0.48
per Mcfe in 1993.
 
                                      18
<PAGE>
 
  The gross margin on trading activities decreased to $924,000 from $1.3
million in 1993. Natural gas trading volumes increased 62% to 17.5 Bcf in
1994. The reduced results were due to a reduction of margins available for gas
trading activities.
 
  General and administrative expenses of $13.3 million were 18% greater than
the previous year. The 1994 amount is net of $3.4 million of operating fee
recoveries compared to a $3.8 million recovery in 1993. The increased general
and administrative expense was due to additional costs incurred by the Company
to expand its activities and to explore in other areas.
 
  During 1994, the Company recorded a $5.1 million net income tax expense
compared to a $6.7 net income tax expense in 1993. The 1994 expense is net of
a $2.1 million reduction in the valuation allowance provided for the deferred
income tax benefit of the net operating loss carryover.
 
                DISCLOSURE REGARDING FORWARD-LOOKING STATEMENTS
   
  This Prospectus includes "forward-looking statements" within the meaning of
Section 27A of the Securities Act of 1933, as amended (the "Securities Act"),
and Section 21E of the Securities Exchange Act of 1934, as amended (the
"Exchange Act"). All statements other than statements of historical facts
included in this Prospectus, including without limitation statements under
"Prospectus Summary," "Risk Factors," "Management's Discussion and Analysis of
Financial Condition and Results of Operations," and "Business and Properties,"
regarding the Company's financial position, reserve quantities and net present
values, business strategy, plans and objectives of management of the Company
for future operations and capital expenditures, are forward-looking
statements. Although the Company believes that the expectations reflected in
the forward-looking statements and the assumptions upon which such forward-
looking statements are based are reasonable, it can give no assurance that
such expectations and assumptions will prove to have been correct. Reserve
estimates are generally different from the quantities of oil and natural gas
that are ultimately recovered. Additional statements concerning important
factors that could cause actual results to differ materially from the
Company's expectations ("Cautionary Statements") are disclosed in the "Risk
Factors" section and elsewhere in this Prospectus. All written and oral
forward-looking statements attributable to the Company or persons acting on
its behalf subsequent to the date of this Prospectus are expressly qualified
in their entirety by the Cautionary Statements.     
 
                                      19
<PAGE>
 
                            BUSINESS AND PROPERTIES
 
OVERVIEW
   
  Barrett is an independent natural gas and crude oil exploration and
production company with core areas of activity in the Rocky Mountain Region of
Colorado, Wyoming and Utah; the Mid-Continent Region of Kansas, Oklahoma, New
Mexico and Texas; and the Gulf of Mexico Region of offshore Texas and
Louisiana. At December 31, 1996, the Company's estimated proved reserves were
814.3 Bcfe (83% natural gas and 17% crude oil) with an implied reserve life of
11.3 years based on 1996 total production of 72.3 Bcfe.     
   
  The Company concentrates its activities in core areas in which it has
accumulated detailed geologic knowledge and developed significant management
expertise. The Company continues to build on its interests in the Piceance
Basin in northwestern Colorado, the Uinta Basin of northeastern Utah, the
Anadarko and Arkoma Basins in Oklahoma, the Wind River Basin in Wyoming and
the Gulf of Mexico. The Company also has significant interests in the Hugoton
Embayment in Kansas and Oklahoma, the Permian Basin in Texas and New Mexico
and the Powder River Basin in Wyoming. At December 31, 1996, these principal
areas of focus represented approximately 94% of the Company's estimated proved
reserves.     
   
  The Company continues to experience significant growth in its proved
reserves, production volumes, revenues and cash flow, particularly in the Wind
River, Piceance, Anadarko, Arkoma and Uinta Basins. The Company currently is
pursuing development projects in the Wind River, Piceance, Anadarko, Arkoma
and Uinta Basins, and exploration projects in the Wind River and Anadarko
Basins, the Gulf of Mexico and the Republic of Peru. The Company's average net
daily production increased to 198 MMcfe for the year ended December 31, 1996
from 159 MMcfe for the year ended December 31, 1996.     
 
  As of September 30, 1996, the Company owned interests in 2,124 producing
wells and operated 1,131 of these wells. These operated wells contributed
approximately 82% of Barrett's natural gas and oil production for the nine
months ended September 30, 1996. The Company also owns interests in and
operates a natural gas gathering system, a 27-mile pipeline and a natural gas
processing plant in the Piceance Basin.
 
  Barrett markets all of its own natural gas and oil production from wells
that it operates. In addition, the Company engages in natural gas trading
activities, which involve purchasing natural gas from third parties and
selling natural gas to other parties at prices and volumes that management
anticipates will result in profits to the Company. Through these natural gas
trading activities, the Company obtains knowledge and information that enables
it to more effectively market its own production. See
"--Natural Gas and Oil Marketing and Trading."
 
BUSINESS STRATEGY
 
  Barrett's business strategy is to generate strong growth in reserves,
production, earnings and cash flow through exploration, development and
selective acquisitions of natural gas and oil properties in its core areas of
activity. The Company implements this strategy through a series of continuing
initiatives:
 
  SPECIALIZED GEOLOGIC EXPERTISE. Both the CEO and President of Barrett are
experienced, practicing geologists. They have established a team of geologists
and geophysicists with expertise in the Company's core areas of activity.
Prior to undertaking projects in new areas, the Company assembles specialized
geologic expertise to identify and evaluate drilling prospects.
 
  ACTIVE DRILLING PROGRAM. Barrett maintains a high quality, balanced
portfolio of lower risk development projects complemented by higher potential
exploration prospects. The Company's
 
                                      20
<PAGE>
 
preliminary 1997 capital expenditure budget is $278 million, approximately 75%
of which is allocated to drilling and production activities. This budget,
which is subject to revision based upon market conditions and other factors,
contemplates that the Company will participate in drilling approximately 290
gross wells in 1997 as compared with 196 gross wells drilled in 1996. The
Company expects to continue high levels of drilling activity after 1997.
 
  ADVANCED TECHNOLOGY. The Company makes extensive use of advanced
technologies, including 3-D seismic and in-house analytical and processing
capabilities, to better define drilling prospects. The Company also uses
advanced production techniques, such as ASP technology, in its enhanced
recovery operations.
 
  OPERATING CORE PROPERTIES. At September 30, 1996, Barrett served as operator
for 1,131 wells, which contributed approximately 82% of the Company's
production during the nine months ended September 30, 1996. As operator, the
Company coordinates drilling activities and arranges for the production,
gathering and sale of its natural gas and oil from operated wells. Serving as
operator enables the Company to exert greater control over the cost and timing
of its exploration, development and production activities.
 
  CONTINUING COST MANAGEMENT. The Company continually strives to reduce
expenses through implementation of cost control programs and active management
of its operations, personnel and administrative activities. Current cost
management initiatives include entering into multi-well and longer term
contracts with drilling companies and participating in alliances with oil
field service companies to obtain more favorable terms.
 
  FINANCIAL STRENGTH. The Company is committed to maintaining financial
flexibility in order to pursue exploration and development activities and to
take advantage of other opportunities that may arise. Historically, the
Company has funded its growth primarily through the issuance of common stock,
including four public stock offerings, its 1995 stock-for-stock merger with
Plains and several recent acquisitions financed with common stock. The
issuance of the Notes adds ten-year fixed rate debt financing to the Company's
capital structure, which will improve Barrett's liquidity, diversify its
capital base and enhance the Company's ability to pursue its business
strategy.
 
  SELECTIVE RESERVE AND LEASEHOLD ACQUISITIONS. From time to time the Company
seeks to augment activities in its core areas, establish operations in new
areas and build acreage positions for exploration prospects through selective
acquisitions. As a result of acquisitions completed during 1996, the Company
increased its working interests in the Piceance Basin, expanded its operations
in the Uinta Basin and substantially increased its leased acreage position in
the Gulf of Mexico.
 
RECENT DEVELOPMENTS
       
  CAPITAL EXPENDITURES. The Company's preliminary 1997 capital expenditure
budget for natural gas and oil activities is $278 million. Total estimated
1997 expenditures are allocated approximately 41% to the Gulf of Mexico
Region, 25% to the Rocky Mountain Region, 19% to the Mid-Continent Region, 6%
to international activities and 9% to possible acquisitions. This budget is
subject to revision based upon market conditions and other factors. See
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" and "--Core Areas of Activities."
 
  OFFSHORE FEDERAL LEASE SALES. At the September 1996 Western Gulf of Mexico
Offshore Lease Sale, the Company significantly expanded its position in the
Gulf of Mexico. The MMS awarded the Company leases covering 17 blocks. The
Company has a 100% working interest in 14 of these blocks and a 50% working
interest in the three other blocks. The Company's net share of the bonus
payments for these leases was $34.4 million. As a result of these
transactions, Barrett holds interests in 46 lease blocks in the Gulf of Mexico
covering approximately 185,000 gross acres. See "--Core Areas of Activity--
Gulf of Mexico Region."
 
                                      21
<PAGE>
 
  UINTA BASIN ACQUISITIONS. In November 1996, the Company expanded its
operations in the Uinta Basin of northeastern Utah when it acquired producing
and non-producing natural gas and oil properties in the Altamont-Bluebell
Field. The effective date of the acquisition of a significant portion of these
properties is January 1, 1997. The purchase included 120 operated wells with an
average working interest of 80%, together with 100,000 gross and 72,000 net
acres of leasehold interests. The total purchase price was approximately $32
million, including approximately $14 million in cash, 50,000 shares of the
Company's common stock, and certain non-strategic producing properties owned by
the Company. In January 1997, the Company acquired additional interests in the
Altamont-Bluebell Field for an aggregate purchase price of $3.5 million in
cash. These interests consist of 16 non-operated wells with average working
interests of 42% together with approximately 10,000 gross and 4,600 net acres
of leasehold interests. See "--Core Areas of Activity--Rocky Mountain Region--
Uinta Basin."
 
  PARTICIPATION IN MARANON BASIN, PERU. In late January 1997, the Company
entered into an agreement with industry partners that provided the Company with
a license covering approximately 2.0 million gross acres located in the Maranon
Basis of northeastern Peru. The Company and its partners intend to acquire and
analyze 200 to 250 miles of seismic data in preparation for exploratory
drilling to begin in late 1997 or early 1998. The Company's participation,
which is subject to approval of the government of Peru, is intended to consist
of a 45% working interest, subject to a cost commitment of 60% of the 1996 and
1997 seismic costs and 60% of the cost of up to three exploratory wells. It is
anticipated that the Company will be designated operator for operations in this
area in mid-1997. See "--Core Areas of Activity--International Operations."
 
CORE AREAS OF ACTIVITY

                   [CORE AREAS OF ACTIVITY MAP APPEARS HERE]

                                       22
<PAGE>
 
  The following table sets forth certain information concerning these core
areas of activity:
 
<TABLE>
<CAPTION>
                                                                                 PRELIMINARY
                                                               AVERAGE DAILY        1997
                         ESTIMATED PROVED  ESTIMATED PROVED    PRODUCTION FOR      CAPITAL
                            RESERVES AT       RESERVES AT    THREE MONTHS ENDED  EXPENDITURE
     BASIN OR FIELD      DECEMBER 31, 1995 DECEMBER 31, 1996 SEPTEMBER 30, 1996    BUDGET
     --------------      ----------------- ----------------- ------------------ -------------
                              (BCFE)            (BCFE)            (MMCFE)       (IN MILLIONS)
<S>                      <C>               <C>               <C>                <C>
Rocky Mountain Region
  Wind River............        88.1              95.8              45.9            $ 25
  Piceance..............       119.1             201.7              32.3              25
  Powder River..........        30.0              32.0              16.5               6
  Green River...........        12.5              14.8               1.5               1
  Uinta.................         4.2              92.2               6.2              12
Mid-Continent Region
  Arkoma................        27.4              26.7              12.6              18
  Anadarko..............        33.7              46.2              22.5              27
  Hugoton Embayment.....       200.7             211.9              38.8               2
  Permian...............        39.1              31.8              14.0               6
Gulf of Mexico Region...         8.7              23.8               4.5             114
International(1)........         --                --                --               16
Other Natural Gas and
 Oil Activities(2)......        27.8              37.4               6.6              26
                               -----             -----             -----            ----
    Total...............       591.3             814.3             201.4            $278
                               =====             =====             =====            ====
</TABLE>
- --------
(1) Consists of the Company's Republic of Peru project.
(2) Reserves primarily located in northeastern Colorado, the Paradox Basin
    (Utah and Colorado) and Nevada. Also includes preliminary 1997 capital
    budget of $25 million for possible acquisitions.
 
ROCKY MOUNTAIN REGION
 
  WIND RIVER BASIN. In 1994, following its major natural gas discovery in the
Cave Gulch Field, the Company began a focused exploration program in the Wind
River Basin of Wyoming, particularly along the Owl Creek Thrust fault.
 
  Cave Gulch Field. In August 1994, the Company drilled the Cave Gulch Federal
Unit #1 well and discovered a significant natural gas field in the Fort Union
and Lance Sandstones below the Owl Creek Thrust. The Company currently owns a
94% working interest in the Cave Gulch Federal Unit. Since August 1994, the
Company has acquired additional interests in the area and currently owns
working interests ranging from 5% to 100% in 16,011 gross leasehold acres,
constituting 9,590 net leasehold acres, in the Cave Gulch area. Combined daily
production for the Cave Gulch Field net to the Company's interest at September
30, 1996 was 42.9 MMcf of natural gas and 160 barrels of oil.
   
  In February 1997, the Company reached total depth on the Cave Gulch #16 deep
test well, which was drilled to 19,106 feet to test the deeper Frontier,
Muddy, Dakota and Lakota formations. The Company plans to begin testing the
well in mid-March 1997. The Company owns an 85.2% working interest in this
well, subject to reduction to 84.9% after payout.     
 
  During 1996, the Company had planned to drill up to 10 wells in the Cave
Gulch Field. However, the Bureau of Land Management (the "BLM") determined
that an environmental impact statement ("EIS") in the greater Cave Gulch area
would be required to assess future development proposals from the Company and
other operators in the area. As a result, the Company drilled four wells in
1996, with the Cave Gulch #16 drilling at year-end. The BLM has indicated that
the EIS will be completed in August 1997, but there is no assurance that this
will be the case. No additional drilling activity in this area for 1997 has
been approved by the BLM, and the BLM has indicated that no drilling activity
will
 
                                      23
<PAGE>
 
be approved prior to the completion of the EIS. The Company will, however, be
permitted to recomplete wells. In the event that the BLM allows drilling
activity in this area pending the completion of the EIS, the Company will
proceed accordingly.
 
  Through December 31, 1996, the Company had drilled 14 wells in the Cave
Gulch area to test the Lance and Fort Union Sandstones. Five of these wells
are producing, two are shut in due to line pressures, four are shut in due to
limited pipeline capacity, two are being completed and one is waiting on
completion. The Company's natural gas production is currently constrained to a
production rate of approximately 39 MMcf per day due to pipeline take-away
capacity in the Cave Gulch area of operation and the Wind River Basin. Two
interstate pipelines serve the Cave Gulch area, and both have proposed
expansions to increase their take-away capacity. The Company is supporting
these expansion proposals with transportation volume commitments. Both
pipeline expansions are scheduled to be completed by mid-1997. In an effort to
increase production, the Company is in the process of starting up a temporary
gas conditioning facility that will allow the Company to remove liquids from
the portion of the gas that currently does not meet pipeline specifications
and to compress gas prior to entering one of the interstate pipelines. Once
fully operational, estimated to be in February 1997, the Company believes that
this temporary facility will be able to increase its natural gas production in
the Cave Gulch area to approximately 59 MMcf per day. See "--Natural Gas and
Oil Marketing and Trading."
 
  Stone Cabin Project. In the second quarter of 1996, the Company acquired a
100% working interest in 9,754 acres in the Wallace Creek Unit and adjacent
land. This acreage, in the Company's Stone Cabin Project, is along the south
flank of the Wind River Basin. In July 1996, the Company began an exploration
and development program to target the Upper Cretaceous Muddy Sandstone and the
Raderville Sandstone of the Lower Cody Shale Formation. The Company has
drilled four wells in this program, two of which are producing. The Company is
testing the other two wells to determine if they are capable of commercial
production. The Company plans to drill up to nine wells in 1997 to test the
Muddy Formation. However, the BLM is imposing restrictions on winter drilling
activities and drilling is not expected to resume until April 1997.
 
  Owl Creek Thrust. The Company continues to evaluate additional exploration
prospects in the Owl Creek Thrust and central Wind River Basin. The Company
has 82,406 gross and 76,681 net acres under lease in portions of the Owl Creek
Thrust and central Wind River Basin outside of the Cave Gulch area. In 1997,
the Company plans to drill three exploratory test wells along the Owl Creek
Thrust and one exploratory test well in the central portion of the Basin.
   
  At December 31, 1995, the Wind River Basin represented 15% of the Company's
estimated proved reserves. At December 31, 1996, this Basin represented 12% of
the Company's estimated proved reserves, and for the year ended December 31,
1996, it represented 21% of the Company's total production. In 1997, 9% of
Barrett's preliminary capital expenditure budget is planned to be spent in the
Wind River Basin for development, leasehold acquisition, seismic surveys and
exploration, including participating in drilling up to 17 wells.     
 
  PICEANCE BASIN. The Piceance Basin of northwestern Colorado is a core
operating area for the Company and will continue to be very prominent in the
Company's capital spending plans. The Company's activities in the Piceance
Basin are conducted primarily in three fields: Parachute, Rulison and Grand
Valley.
 
  The Company's drilling activities in the Piceance Basin primarily target the
lenticular sandstones of the Williams Fork Formation of the Mesaverde Group.
These sandstone reservoirs overlie the blanket sandstones of the Iles
Formation in the basal Mesaverde. Barrett drilled its first well in the
Piceance Basin in 1984. At present, the Company owns interests in 297 wells
and operates 285 wells in the Piceance Basin.
 
                                      24
<PAGE>
 
  In 1996, the Company completed the acquisition of working interests in the
Piceance Basin from some of the Company's former joint working interest owners
in this project, and the Company's average working interest in properties in
this area increased from approximately 29% to approximately 62%. The Company
paid an aggregate of $28.9 million cash and issued an aggregate of 585,661
shares of common stock to acquire these interests.
 
  In February 1995, the Company received approval for 40-acre well density by
the Colorado Oil and Gas Conservation Commission (the "Colorado Commission")
with respect to 81 640-acre sections in the Parachute, Rulison and Grand
Valley Fields, and has commenced an active development drilling program on 40-
acre sites in the Rulison, Grand Valley and Parachute Fields. In November
1996, the Company requested and received approval from the Colorado Commission
for two four-well pilot drilling programs on 20-acre well density. These two
pilot programs are located in the Grand Valley and Rulison Fields and are
scheduled to be drilled in early 1997. The Company will evaluate the
engineering and geologic data resulting from these pilot programs and
determine whether to apply for approval for 20-acre well density on all or
selected acreage in the Piceance Basin in the future. There is no assurance
that the Colorado Commission will approve any additional requests for 20-acre
well density.
   
  At December 31, 1995, the Piceance Basin represented 20% of the Company's
estimated proved reserves. At December 31, 1996, this Basin represented 25% of
the Company's estimated proved reserves, and for the year ended December 31,
1996, it represented 14% of the Company's total production. The Company
currently is continuously operating three drilling rigs in the Basin. In 1997,
the Company intends to spend 9% of its preliminary capital expenditure budget
in the Piceance Basin for development and exploration, including participating
in drilling up to 56 wells and 20 recompletions.     
 
  Grand Valley Gathering System. In 1985, the Company's wholly-owned
subsidiary, Bargath, Inc., designed and constructed a gathering system in the
Grand Valley Field to transport natural gas from certain of the Company's
wells to Questar Pipeline Corporation's interstate pipeline. This gathering
system subsequently has been expanded to approximately 150 miles, and a 16-
inch, 27-mile pipeline has been added. Through three acquisitions in 1996, the
Company increased its ownership interest in this system to approximately 62%.
As of December 31, 1996, the Grand Valley Gathering System was connected to
220 producing natural gas wells in the Piceance Basin. The system now has the
flexibility to deliver natural gas to three interstate pipelines, which are
owned respectively by Questar Pipeline Company, Northwest Pipeline Corporation
and Colorado Interstate Gas Company, and one intrastate pipeline owned by
Public Service Company of Colorado and K N Energy, Inc. ("K N"). In December
1994, the Company completed the construction of a 90,000 MMBtu per day natural
gas processing plant to extract liquid hydrocarbons from the natural gas
stream. Depending on the take-away capacity from time to time of these four
pipeline systems, the gathering system has the capability of delivering
approximately 90,000 MMBtu of natural gas per day.
 
  POWDER RIVER BASIN. The Powder River Basin in Wyoming is primarily an oil
province, with production from Cretaceous and Permian-age formations. One of
the reservoir targets in this area is the Permian Minnelusa Formation. This
Basin contributes approximately 40% of the Company's daily oil production. The
Company currently anticipates that additional activity will concentrate on
development drilling and enhanced recovery projects utilizing 3-D seismic
technology where appropriate.
 
  The Company has initiated or is planning the use of ASP technology to
chemically enhance oil recovery in a number of fields. The Company also is
using 3-D seismic technology to identify development opportunities in this
area.
   
  At December 31, 1995, the Powder River Basin represented 5% of the Company's
estimated proved reserves. At December 31, 1996, this Basin represented 4% of
the Company's estimated proved reserves, and for the year ended December 31,
1996, it represented 8% of the Company's total     
 
                                      25
<PAGE>
 
production. In 1997, the Company intends to spend 2% of its preliminary
capital expenditure budget for development, enhanced recovery projects
utilizing 3-D seismic technology, and exploration opportunities in the Powder
River Basin, including participating in drilling up to 15 wells.
   
  GREEN RIVER BASIN/WYOMING OVERTHRUST. The Company owns leasehold interests
within the greater Green River Basin, primarily in the Moxa Arch, Rock Springs
Uplift and Wamsutter Arch areas, the West Side Canal Field, and in the Wyoming
Overthrust Trend. The Company participated in two wells in the Green River
Basin in 1996. At December 31, 1995, the Green River Basin represented 2% of
the Company's estimated proved reserves. At December 31, 1996, this Basin
represented 2% of the Company's estimated proved reserves, and for the year
ended December 31, 1996, it represented 2% of the Company's total production.
In 1997, the Company intends to spend approximately $626,000 for capital
expenditures in drilling up to six wells and recompleting three additional
wells in the Green River Basin.     
 
  UINTA BASIN. As an extension of its Piceance Basin operations, in 1995, the
Company entered the Uinta Basin of Duchesne and Uintah Counties, in
northeastern Utah. The Uinta Basin is separated from the Piceance Basin by the
Douglas Creek Arch.
 
  Brundage Canyon Field. Beginning in December 1995, the Company made
acquisitions totaling $5.2 million in the Brundage Canyon Field. As a result
of these acquisitions and new drilling, the Company currently owns working
interests ranging from 47% to 100% in 32 producing wells, a gathering and
transmission system, and 40,000 gross acres, covering approximately 34,000 net
acres, all of which are on the Ute Indian Reservation. Wells in this Field
produce primarily from multiple sandstone reservoirs of the lower Green River
Formation at depths averaging 5,500 feet. As of December 31, 1996, these wells
produced approximately 640 barrels of black wax crude oil per day.
 
  The Company plans extensive work in this Field during 1997, including a 15-
well program to develop infill and field extension locations, a 40-acre pilot
waterflood project, and recompletions and workovers of existing wells to test
the viability of shallower horizons for potential future development.
 
  Altamont-Bluebell Project. The Altamont-Bluebell Field complex, which
includes the Cedar Rim area, covers a large portion of the northern Uinta
Basin. In 1996, the Company acquired through a number of transactions working
interests ranging from 25% to 100% in 159 producing wells, and approximately
126,000 gross and 91,000 net acres of leasehold interests. The largest of
these acquisitions was completed on November 1, 1996 when the Company acquired
producing and non-producing natural gas and oil properties in the Altamont-
Bluebell Field. The effective date of the acquisition of a significant portion
of these properties is January 1, 1997. The purchase included 120 operated
wells with an average working interest of 80%, together with approximately
100,000 gross and 72,000 net acres of leasehold interests. The total purchase
price for the November 1996 acquisition was approximately $32 million,
including approximately $14 million cash, 50,000 shares of the Company's
common stock, and certain non-strategic producing properties owned by the
Company. The Company's production in this area is predominantly from the
multiple sandstone reservoirs in the Wasatch Formation which are found at an
average depth of 12,000 feet. Also productive in the Field are the upper,
lower, and middle portions of the Green River Formation at depths of 5,000 to
7,000 feet.
 
  In January 1997, the Company acquired additional interests in this Field for
$3.5 million. These interests consist of 16 non-operated wells with average
working interests of 42%, together with approximately 10,000 gross and 4,600
net acres of leasehold interests.
 
  In 1997, the Company plans a 30 well recompletion/restimulation program and
the drilling of six development and extension wells in the Uinta Basin.
Expenditures for this activity in 1997 are expected to total $12 million, or
4% of the Company's preliminary capital expenditure budget. With this activity
 
                                      26
<PAGE>
 
the Company plans to test the potential in the lower, middle, and upper Green
River Formation both from behind pipe in existing wells and in new infill
locations.
 
MID-CONTINENT REGION
   
  ARKOMA BASIN. Due to the complex structure and overlapping nature of the
rock formations, the Company has been using and will continue to use 3-D
seismic surveys extensively in the Arkoma Basin in Oklahoma. In 1996, Barrett
participated in the drilling of 15 wells in five areas of the Arkoma Basin in
Oklahoma: South Panola 3-D area, Limestone Ridge area, Wilburton Field, the
Choctaw Thrust 3-D area, and Alderson area. At December 31, 1995, the Arkoma
Basin represented 5% of the Company's estimated proved reserves. At December
31, 1996, this Basin represented 3% of the Company's estimated proved
reserves, and for year ended December 31, 1996, it represented 7% of the
Company's total production.     
 
  In 1997, the Company intends to spend 7% of its preliminary capital
expenditure budget for drilling in the Arkoma Basin, including participating
in drilling up to 22 wells, together with land and seismic surveys.
   
  ANADARKO BASIN. Since 1993, the Anadarko Basin in southwestern Oklahoma has
been one of the Company's most active drilling areas. In 1996, the Company
participated in the drilling of 58 wells with working interests ranging from
1.5% to 100% after payout. While staying active in the Strong City Red Fork
Play, the Company has become increasingly active in the Mountain Front Granite
Wash play and the Sentinel Field area. At December 31, 1995, the Anadarko
Basin represented 6% of the Company's estimated proved reserves. At December
31, 1996, this Basin represented 6% of the Company's estimated proved
reserves, and for the year ended December 31, 1996, it represented 11% of the
Company's total production.     
 
  The Company plans to spend 10% of its preliminary 1997 capital expenditure
budget in the Anadarko Basin for development and exploration drilling,
including participating in drilling up to 60 wells, together with leasehold
acquisitions and seismic surveys as currently planned.
   
  HUGOTON EMBAYMENT. The largest single producing area for the Company is the
Hugoton Embayment, which is one of the largest natural gas producing areas in
the United States, located in southwest Kansas, the Oklahoma panhandle and the
Texas panhandle. The Company produces natural gas from three fields in the
Hugoton Embayment: the Hugoton, the Guymon-Hugoton and Panoma Fields. At
December 31, 1995, the Hugoton Embayment represented 34% of the Company's
estimated proved reserves. At December 31, 1996, this Basin represented 26% of
the Company's estimated proved reserves, and for the year ended December 31,
1996, it represented 21% of the Company's total production.     
 
  Hugoton and Guymon-Hugoton Fields. In the Hugoton and Guymon-Hugoton Fields,
the Company has working interests in 359 gross wells and operates 314 of them.
The Hugoton and the Guymon-Hugoton Fields produce from the Chase Formation.
Six wells were drilled in the Hugoton Field in 1996, three of which are on
production and the remaining three of which are expected to begin production
in February 1997.
 
  Panoma Field. Panoma is the field designation for natural gas produced from
the Council Grove Formation, a formation beneath the Chase Formation. The
Council Grove Formation has similar reservoir rocks as the Chase Formation.
However, the productive limits are not as extensive. Presently, the Company
has a working interest in 55 gross Panoma wells and operates 51 of those
wells, including one well drilled in 1996 which was placed on production in
January 1997.
 
  Natural Gas Sales Agreement. The majority of the Company's natural gas
production from the Hugoton and Panoma Fields is sold under a long-term
contract (life-of-field) to KN Gas Supply
 
                                      27
<PAGE>
 
Services, Inc. ("KNGSS"). Among other things, this contract provides for
annual re-determination of the price the Company is to receive. In 1997, as in
1996, the price is calculated each month by using the average of four Mid-
Continent index prices less a variable amount ranging from $.11 per MMBtu for
an average index price less than $.75 to a maximum of $.20 for an average
index price of $2.26 or higher. The volume of natural gas for which the
Company receives payment is reduced by one percent of the volume as an in-kind
fuel charge for moving the natural gas.
 
  Net Profit Agreements. The Company produces natural gas in the Guymon-
Hugoton Field and the nearby Camrick Field under a Dry Gas Agreement with
Chevron U.S.A. Inc. ("Chevron"). This agreement allows the Company to expend
funds for the operation of the properties (including the cost of drilling
wells) and to recoup the funds so expended from current production income.
Eighty percent of net operating income generated by the natural gas production
(after operational costs are recouped, including the cost of drilling and
equipping wells) is then paid to Chevron. At each of December 31, 1995 and
1996, the Company had interests in 56 wells subject to the terms of this
agreement. The Company also produces natural gas in the Hugoton Field under
various agreements similar to the Chevron agreement, except that net operating
income is allocated 15% to the Company and 85% to other parties. At December
31, 1996, the Company had interests in an aggregate of 49 Chase Formation
wells and eight Council Grove Formation wells under these other agreements.
 
  The third party interests under all the net profit agreements are treated as
lease operating expenses by the Company. Additional or replacement wells
drilled on the properties would be operated under the same terms and
conditions as existing wells, and would result in the commencement of the
80/20 or 85/15 net operating income allocation after the cost of the new wells
is recovered.
 
  Hugoton Gas Trust Agreement. Natural gas rights established in 1955 to
approximately 50,000 acres in Finney and Kearny Counties, Kansas were
transferred to Plains by K N on October 1, 1984 subject to a natural gas
payment of $0.06 per Mcf for natural gas produced from the acreage. Quarterly
payments are made by the Company to the Hugoton Gas Trust, a publicly held
trust created in 1955. Payments terminate when the estimated gross recoverable
natural gas reserves decline to 50 Bcf or less. As of December 31, 1995, the
gross proved natural gas reserves attributable to the leases burdened by this
agreement were estimated to be 176.4 Bcf. The natural gas payments are treated
as lease operating expenses by the Company. At December 31, 1996, the Company
had working interests in 196 wells that were subject to these payments. Any
additional natural gas wells drilled on this acreage also will be subject to
the $0.06 payment per Mcf of natural gas produced.
 
  Barrett intends to spend $2 million of its preliminary 1997 capital
expenditure budget on the Hugoton Embayment for development drilling and
increased deliverability through compression, including participating in
drilling eight new wells.
   
  PERMIAN BASIN. The Permian Basin in west Texas and southeast New Mexico is
primarily an oil province. As of December 31, 1996, the Company had an
interest in 224 gross wells (170 net wells) located in the Permian Basin,
which produce approximately 2,200 barrels of oil per day net to the Company's
interests. In 1996, Barrett participated in drilling 15 wells in the Permian
Basin. At December 31, 1995, the Permian Basin represented 7% of the Company's
estimated proved reserves. At December 31, 1996, this Basin represented 4% of
the Company's estimated proved reserves, and for the year ended December 31,
1996, it represented 7% of the Company's total production. Barrett intends to
spend 2% of its preliminary 1997 capital expenditure budget in the Permian
Basin, including participating in drilling up to 31 wells. If a pending down-
spacing request regarding the Spraberry Trend area is approved, which would
allow an optional well on each existing 80 acre well site, the Company intends
to drill approximately 15 additional infill wells in 1997.     
 
                                      28
<PAGE>
 
GULF OF MEXICO REGION
 
  Beginning in the latter half of 1995 and continuing during 1996, the Company
established a new core area in the Gulf of Mexico offshore Louisiana and
Texas. The Company believes that this area has significant reserve potential
and is well suited to its exploration emphasis and geologic expertise. The
availability of extensive 3-D seismic coverage over most of the Outer
Continental Shelf ("OCS"), the frequency of lease sales and the turnover of
expiring leases also make the Gulf of Mexico an attractive area. In addition,
wells in the Gulf of Mexico typically produce at higher rates, which increases
cash flow, but have relatively shorter productive lives. This production
profile will complement the Company's long-lived, relatively lower
deliverability wells in the Rocky Mountain and Mid-Continent regions. Also,
Gulf of Mexico natural gas prices historically have been higher than prices in
other regions in which the Company operates.
 
  Initially, the Company's Gulf of Mexico operations centered on developing
high quality prospects with established operators. At the April 1996 Central
Gulf of Mexico Outer Continental Shelf Lease Sale, the Company joined another
operator in acquiring nine blocks. The Company has a 25% working interest
through completion of production facilities and a 22% working interest
thereafter in each of these nine blocks. Separately, the Company joined with a
second operator with a 50% working interest, in acquiring one block. In
addition, the Company acquired a block in which it has a 100% interest. Bonus
payments net to the Company for these lease interests totaled $2.3 million.
 
  The Company's efforts are now directed at internally developing an inventory
of high quality prospects for future drilling. This effort was significantly
advanced at the Western Gulf of Mexico Outer Continental Shelf Sale in
September 1996. The Company was high bidder on 19 blocks in water depths
ranging from 33 feet to 315 feet. The MMS awarded the Company leases covering
17 of these blocks. The Company has a 100% working interest in 14 of these
blocks and a 50% working interest in the three other blocks. The Company's net
share of the bonus payments for these leases was $34.4 million. The MMS
rejected the two remaining high bids submitted by the Company because the MMS
deemed these bids insufficient.
   
  In 1996, the Company participated in 15 Gulf of Mexico wells, 12 of which
were successful. The preliminary 1997 Gulf of Mexico capital expenditure
budget is estimated at $114 million to drill 31 wells, acquire additional 3-D
seismic for future prospects, lease additional future prospects and to put
into production eight wells drilled in 1996. This amount represents 41% of the
Company's preliminary 1997 capital expenditure budget.     
   
  At December 31, 1995, the Gulf of Mexico represented 1% of the Company's
estimated proved reserves. At December 31, 1996, the Gulf of Mexico
represented 3% of the Company's estimated proved reserves, and for the year
ended December 31, 1996, it represented 3% of the Company's total production.
    
INTERNATIONAL OPERATIONS
 
  With an industry partner, the Company obtained in November 1996 a license to
evaluate, explore and develop approximately 820,000 acres in the Maranon Basin
of eastern Peru. The Company currently has a 55% working interest in this
project and has the right to increase its working interest to 77.5%. Pursuant
to the license, the Republic of Peru receives a variable royalty payment on
production that is anticipated to average approximately 23%. In the initial
phase of the license, which is underway, the Company and its co-venturer will
be conducting seismic reprocessing and environmental and engineering
feasibility studies regarding the viability of developing the Bretana Field,
which was discovered in 1974 by another company. Gross costs of approximately
$1.3 million for this first phase are expected. Following those studies, it is
anticipated that an appraisal well will be drilled in the third quarter of
1997. The gross costs of drilling and testing this well are anticipated to be
approximately $4.5 million.
 
                                      29
<PAGE>
 
          
  In late January 1977, the Company entered into an agreement with industry
partners that provided the Company with a license covering approximately 2.0
million gross acres located in the Maranon Basin of northeastern Peru. The
Company and its partners intend to acquire and analyze 200 to 250 miles of
seismic data in preparation for exploratory drilling to begin in late 1997 or
early 1998. The Company's participation, which is subject to approval of the
government of Peru, is intended to consist of a 45% working interest, subject
to a cost commitment of 60% of the 1996 and 1997 seismic costs and 60% of the
cost of up to three exploratory wells. The Company estimates that its total
net cost for this participation in seismic acquisition and the drilling of
three exploratory wells will approximate $7.5 million in 1997 and $7.2 million
in 1998. It is anticipated that the Company will be designated operator for
operations in this area in mid-1997. Estimated capital expenditures for
international operations for 1997 constitute approximately 6% of the Company's
preliminary capital expenditure budget.     
 
NATURAL GAS AND OIL MARKETING AND TRADING
 
  Barrett markets all of its own natural gas and oil production from wells
that it operates. In addition, the Company engages in natural gas trading
activities, which involve purchasing natural gas from third parties and
selling natural gas to other parties at prices and volumes that management
anticipates will result in profits to the Company. Through these natural gas
trading activities, the Company obtains knowledge and information that enables
it to more effectively market its own production. See "Risk Factors--
Volatility of Prices and Availability of Markets" and "--Other Industry and
Business Risks."
 
  NATURAL GAS. The Company has entered into a number of gas sales agreements
on behalf of itself and its industry partners with respect to the sale of
natural gas from its properties in each of the Company's basins. These
contracts vary with respect to their specific provisions, including price,
quantity, and length of contract. As of December 31, 1996, less than 7% of the
Company's production was committed to natural gas sales contracts that had
fixed prices or price ceilings. With the exception of two contracts covering
approximately 8,100 MMBtu per day of natural gas production from the Piceance
Basin through 2011, none of the contracts provides for fixed prices or price
ceilings beyond October 1997. The Company believes that it has sufficient
production from its properties to meet the Company's delivery obligations
under its existing natural gas sales contracts.
 
  The Company has entered into a series of firm transportation agreements with
various Rocky Mountain pipeline companies. At January 1, 1997, these
transportation arrangements had terms ranging from seven months to ten years.
These transportation agreements provide the Company the opportunity to
transport its Rocky Mountain natural gas production into the Mid-Continent
area. These agreements in total provide transportation of approximately 52% of
the Company's current daily Rocky Mountain production.
 
  In addition to the agreements described above, the Company has entered into
transportation arrangements to support future expansions of Rocky Mountain
interstate pipelines. These expansions are designed to transport Rocky
Mountain natural gas production to the Mid-Continent area for sale. The
Company has committed to 5,000 MMBtu per day of pipeline capacity for terms
ranging from five years to 10 years. These expansions are subject to Federal
Energy Regulatory Commission ("FERC") approval and are scheduled to be
operational by the third quarter of 1997.
 
  For each of 1996 and 1997, the Company renegotiated the pricing provisions
with KNGSS with respect to a majority of its Hugoton and Panoma Fields natural
gas production. The price is calculated on a monthly basis by using the
average of four Mid-Continent index prices less a variable amount ranging from
$.11 per MMBtu for an average index price less than $.75 to a maximum of $.20
for an average index price of $2.26 or higher. The volume of natural gas for
which the Company receives payment is reduced by one percent of the volume as
an in-kind fuel charge for moving the natural gas.
   
  During the year ended December 31, 1996, there was one natural gas
purchaser, KNGSS, that accounted for approximately 11% of the Company's total
revenues. The Company believes it would be able to locate alternate customers
in the event of the loss of this customer.     
 
                                      30
<PAGE>
 
  The Company has established a Risk Management Committee to oversee its
production hedging and trading activities. The Risk Management Committee
consists of the Chief Executive Officer, the President and Chief Operating
Officer, the Chief Financial Officer, and the Executive Vice President--
Operations. With respect to production hedge transactions, it is the policy of
the Company that the Risk Management Committee review and approve all such
transactions.
 
  As a result of its natural gas trading activities, the Company may from time
to time have natural gas purchase or sales commitments without corresponding
contracts to offset these commitments, which could result in losses to the
Company. The Company currently attempts to control and manage its exposure to
these risks by monitoring and hedging its trading positions as it deems
appropriate and by having the Company's Risk Management Committee review
significant trades or positions before they are committed to by trading
personnel. All fixed price trading activities are hedged to lock in margins.
 
  As of December 31, 1996, the Company had entered into financial transactions
to hedge approximately 8.8 Bcf of natural gas production for the period from
January 1997 through October 1997. In January 1997, the Company entered into a
transaction to hedge an aggregate of 25.6 Bcf of natural gas production from
the Rocky Mountain Region for the five-year period from March 1998 through
February 2003. On February 10, 1997, the Company entered into a transaction to 
hedge an aggregate of an additional approximately 18.2 Bcf of natural gas 
production from the Rocky Mountain Region for the same five-year period.
 
  For the year ended December 31, 1995, revenues from trading activities,
which includes the cost of natural gas purchased or sold for trading purposes,
were $28.6 million, which constituted 22% of the Company's consolidated
revenues and generated a gross margin of $943,000. For the nine months ended
September 30, 1996, revenues from trading activities were $30.5 million, which
constituted 22% of the Company's consolidated revenues and generated a gross
margin of $2.1 million. See "Management's Discussion and Analysis of Financial
Condition and Results of Operations."
 
 OIL AND CONDENSATE. Oil, including condensate production, is generally sold
from the leases at posted field prices, plus negotiated bonuses. Marketing
arrangements are made locally with various petroleum companies. The Company
sells its own oil production to numerous customers. No single customer's total
oil purchases represented more than 10% of total Company revenues in 1996. Oil
revenues totaled $26.0 million for the nine months ended September 30, 1996
and represented 19% of the Company's total revenues for that period. The
Company does not engage in oil trading activities.
 
PRODUCTION
 
  The table below sets forth information with respect to the Company's net
interests in producing natural gas and oil properties for each of its last
three years and for the nine months ended September 30, 1996 and 1995,
respectively:
 
<TABLE>
<CAPTION>
                                                NATURAL GAS AND OIL PRODUCTION
                                              ----------------------------------
                                                                    NINE MONTHS
                                                   YEAR ENDED          ENDED
                                                  DECEMBER 31,     SEPTEMBER 30,
                                              -------------------- -------------
                                               1993   1994   1995   1995   1996
                                              ------ ------ ------ ------ ------
<S>                                           <C>    <C>    <C>    <C>    <C>
Quantities Produced and Sold
 Natural gas (Bcf)..........................    31.7   33.3   47.7   33.9   44.1
 Oil and condensate (MMBbls)................     1.3    1.3    1.7    1.3    1.4
Average Sales Price
 Natural gas ($/Mcf)........................  $ 1.94 $ 1.83 $ 1.47 $ 1.48 $ 1.73
 Oil and condensate ($/Bbl).................   14.93  13.95  15.76  15.84  18.61
Average Production Costs/Mcfe...............  $ 0.77 $ 0.69 $ 0.60 $ 0.61 $ 0.65
</TABLE>
 
                                      31
<PAGE>
 
PRODUCTIVE WELLS AND DEVELOPED ACREAGE
 
  The productive wells in which the Company owned a working interest as of
December 31, 1996 are described in the following table:
 
<TABLE>
<CAPTION>
                            PRODUCTIVE WELLS (1)
                          -------------------------
                           GAS WELLS    OIL WELLS   DEVELOPED ACREAGE
                          ------------ ------------ -----------------
                          GROSS  NET   GROSS  NET    GROSS     NET
                          ----- ------ ----- ------ -----------------
<S>                       <C>   <C>    <C>   <C>    <C>      <C>      
Rocky Mountain Region
 Wind River.............    462  23.24    0    0.00    5,115    3,411
 Piceance...............    308 161.31    0    0.00   36,560   20,336
 Powder River...........     39   3.25  335   80.74   42,848   26,319
 Green River............     45  22.64    3    1.80   22,055    7,038
 Uinta..................      1    .78  135  115.58   97,580   60,940
Mid-Continent Region
 Arkoma.................    121  32.06    0    0.00   51,200   14,450
 Anadarko...............    149  64.89   13   12.60   83,265   49,920
 Hugoton Embayment......    412 347.80    0    0.00   88,332   84,946
 Permian................     54  17.63  210  145.69   45,701   15,143
Gulf of Mexico Region...     21   5.86    3    1.00   34,765    9,255
Other...................     88  60.84   74    5.78   41,225   28,209
                          ----- ------  ---  ------ -------- --------
 Total..................  1,203 640.87  854  332.27  548,646  319,967
                          ===== ======  ===  ====== ======== ========
</TABLE>
- --------
(1) Each well completed to more than one producing zone is counted as a single
    well. The Company has royalty interests in certain wells that are not
    included in this table.
 
DRILLING ACTIVITY
 
  The following table summarizes the Company's natural gas and oil drilling
activities, all of which were located in the United States, during the last
three years:
 
<TABLE>
<CAPTION>
                                                        WELLS DRILLED
                                             -----------------------------------
                                                   YEAR ENDED DECEMBER 31,
                                             -----------------------------------
                                                1994        1995        1996
                                             ----------- ----------- -----------
                                             GROSS  NET  GROSS  NET  GROSS  NET
                                             ----- ----- ----- ----- ----- -----
<S>                                          <C>   <C>   <C>   <C>   <C>   <C>
Development
  Natural gas...............................  100  36.51   88  39.03   94  46.24
  Oil.......................................   19  12.62   22  11.68   43  30.48
  Non-productive............................   18   7.65   10   3.51   17   8.03
                                              ---  -----  ---  -----  ---  -----
    Total...................................  137  56.78  120  54.22  154  84.75
                                              ===  =====  ===  =====  ===  =====
Exploratory
  Natural gas...............................    1   0.50    0   0.00    8   4.05
  Oil.......................................    5    .58    1   0.33    3   1.00
  Non-productive............................    8   1.84    8   2.65    6   3.66
                                              ---  -----  ---  -----  ---  -----
    Total...................................   14   2.92    9   2.98   17   8.71
                                              ===  =====  ===  =====  ===  =====
</TABLE>
 
  In addition, the Company was participating in 25 gross (10.82 net) wells,
which were in the process of being drilled, at December 31, 1996.
 
RESERVES
   
  The table below sets forth the Company's estimated quantities of historical
proved reserves, all of which were located in the United States, and the
present values attributable to those reserves. These estimates were prepared
by the Company, with certain portions having been reviewed by Ryder Scott
Company, an independent reservoir engineer, and the other portions having been
reviewed or prepared by Netherland, Sewell & Associates, Inc., an independent
reservoir engineer. The estimates as of December 31, 1996 were reviewed solely
by Ryder Scott Company. The total proved net reserves     
 
                                      32
<PAGE>
 
estimated by the Company were within 10% of those reviewed and estimated by
the engineers; however, on a well by well basis, differences of greater than
10% may exist. See "Risk Factors--Engineers' Estimates of Reserves and Future
Net Revenues."
 
<TABLE>   
<CAPTION>
                                          ESTIMATED PROVED RESERVES
                               ------------------------------------------------
                                                 DECEMBER 31,
                               ------------------------------------------------
                                  1993        1994        1995         1996
                               ----------- ----------- ----------- ------------
                                (DOLLARS IN MILLIONS EXCEPT SALES PRICE DATA)
<S>                            <C>         <C>         <C>         <C>
Estimated Proved Reserves(1):
  Natural gas (Bcf)..........        364.8       458.8       513.5        674.9
  Oil and condensate
   (MMBbls)..................          6.9        11.4        13.0         23.2
    Total (Bcfe).............        406.5       527.5       591.3        814.3
Proved developed reserves
 (Bcfe)......................        375.6       440.1       489.7        606.3
Natural gas price as of De-
 cember 31 ($/Mcf)...........  $      1.95 $      1.67 $      1.77 $       3.46
Oil price as of December 31
 ($/Bbl).....................  $     11.05 $     14.43 $     17.35 $      24.12
Present value of estimated
 future net revenues
  before future income taxes
   discounted at 10%(2)......  $     277.6 $     322.7 $     432.6 $    1,121.5
Standardized measure of
 discounted net cash
 flows(3)....................  $     203.1 $     242.6 $     309.9          --
</TABLE>    
- --------
   
(1) The Company's annual reserve reports were prepared by the Company. With
    respect to the reserve estimates as of and prior to December 31, 1995,
    certain portions of the reserve report were reviewed by Ryder Scott
    Company, an independent reservoir engineer. The remaining portions of
    these reports concerning the reserves that are held by the Company's
    Plains subsidiary were reviewed or prepared by Netherland, Sewell &
    Associates, Inc., an independent reservoir engineering firm that reviewed
    Plains' reserve reports from 1988 through 1995.     
   
(2) The Present value of estimated future net revenues on a non-escalated
    basis is based on weighted average prices realized by the Company of $1.95
    per Mcf of natural gas and $11.05 per Bbl of oil at December 31, 1993,
    $1.67 per Mcf of natural gas and $14.43 per Bbl of oil at December 31,
    1994, $1.77 per Mcf of natural gas and $17.35 per Bbl of oil at December
    31, 1995 and $3.46 per Mcf of natural gas and $24.12 per Bbl of oil at
    December 31, 1996.     
 
(3) The Standardized measure of discounted net cash flows prepared by the
    Company represents the Present value of estimated future net revenues
    after income taxes discounted at 10%.
       
  In accordance with applicable requirements of the Securities and Exchange
Commission, (the "Commission"), estimates of the Company's proved reserves and
future net revenues are made using sales prices estimated to be in effect as
of the date of such reserve estimates and are held constant throughout the
life of the properties (except to the extent a contract specifically provides
for escalation). Estimated quantities of proved reserves and future net
revenues therefrom are affected by natural gas and oil prices, which have
fluctuated widely in recent years. There are numerous uncertainties inherent
in estimating natural gas and oil reserves and their estimated values,
including many factors beyond the control of the producer. The reserve data
set forth in this Prospectus represents only estimates. Reservoir engineering
is a subjective process of estimating underground accumulations of natural gas
and oil that cannot be measured in an exact manner. The accuracy of any
reserve estimate is a function of the quality of available data and of
engineering and geological interpretation and judgment. As a result, estimates
of different engineers, including those used by the Company, may vary. In
addition, estimates of reserves are subject to revision based upon actual
production, results of future development and exploration activities,
prevailing natural gas and oil prices, operating costs and other factors,
which revisions may be material. Accordingly, reserve estimates are often
different from the quantities of natural gas and oil that are ultimately
recovered and are highly dependent upon the accuracy of the assumptions upon
which they are based.
 
  In general, the volume of production from natural gas and oil properties
owned by the Company declines as reserves are depleted. Except to the extent
the Company acquires additional properties
 
                                      33
<PAGE>
 
containing proved reserves or conducts successful exploration and development
activities, or both, the proved reserves of the Company will decline as
reserves are produced. Volumes generated from future activities of the Company
are therefore highly dependent upon the level of success in acquiring or
finding additional reserves and the costs incurred in doing so.
 
  Reference should be made to "Supplemental Gas and Oil Information" on pages
F-23 and F-24 following the Consolidated Financial Statements included in this
Prospectus for additional information pertaining to the Company's proved
natural gas and oil reserves as of the end of each of the last three fiscal
years. During the past year, the only report concerning the Company's
estimated proved reserves that was filed with a U.S. federal agency other than
the Commission was filed prior to the Company's merger with Plains, by Barrett
and Plains, respectively. This report was the Annual Survey of Domestic Oil
and Gas Reserves and was filed with the Energy Information Administration
("EIA") as required by law. Only minor differences of less than 5% in reserve
estimates, which were due to small variances in actual production versus year
end estimates, have occurred in certain classifications reported in this
Prospectus as compared to those in the EIA report.
 
UNDEVELOPED ACREAGE
 
  The gross and net acres of undeveloped natural gas and oil leases held by
the Company as of December 31, 1996 are summarized in the following table.
"Undeveloped Acreage" includes leasehold interests that already may have been
classified as containing proved undeveloped reserves.
 
<TABLE>
<CAPTION>
                                                             UNDEVELOPED
                                                             ACREAGE(1)
                                                          -----------------
UNITED STATES
- -------------
                                                            GROSS     NET
                                                          --------   ------
<S>                                                       <C>       <C>     
Colorado (Piceance and other basins).....................   125,506  59,035
Oklahoma (Anadarko and Arkoma Basins)....................    75,429  65,706
Texas (Permian Basin)....................................     5,952   1,313
Utah (Uinta Basin).......................................    57,168  44,346
Wyoming (Wind River, Greater Green River, Powder River
 and other
 basins).................................................   228,257 157,244
Gulf of Mexico ..........................................   179,791 114,093
Other....................................................    16,050   7,537

<CAPTION>
INTERNATIONAL
- -------------
<S>                                                       <C>       <C>     
Peru.....................................................   820,000 451,000
                                                          --------- ------- 
  Total.................................................. 1,508,153 900,274
                                                          ========= =======
</TABLE>
- --------
(1) Undeveloped acreage is leased acreage on which wells have not been drilled
    or completed to a point that would permit the production of commercial
    quantities of natural gas and oil regardless of whether such acreage
    contains proved reserves. Of the aggregate of 1,508,153 gross and 900,274
    net undeveloped acres, 165,896 gross and 75,250 net acres are held by
    production from other leasehold acreage.
 
  Substantially all the leases summarized in the preceding table will expire
at the end of their respective primary terms unless the existing leases are
renewed or production has been obtained from the acreage subject to the lease
prior to that date, in which event the lease will remain in effect until the
cessation of production. The following table sets forth the gross and net
acres subject to leases summarized in the preceding table that will expire
during the periods indicated:
 
                                      34
<PAGE>
 
<TABLE>
<CAPTION>
                                                                ACRES EXPIRING
                                                               -----------------
                                                                 GROSS     NET
                                                               --------- -------
<S>                                                            <C>       <C>
Twelve Months Ending:
  December 31, 1997...........................................    91,416  31,630
  December 31, 1998...........................................    30,493  30,348
  December 31, 1999...........................................    58,476  58,408
  December 31, 2000 and later................................. 1,327,768 779,888
</TABLE>
 
OVERRIDING ROYALTY INTERESTS
 
  The Company owns overriding royalty interests covering in excess of 52,394
gross acres. The majority of these overriding royalty interests are within a
range of approximately 0.25 to 2.5 percent.
 
GOVERNMENT REGULATION OF THE OIL AND GAS INDUSTRY
 
 GENERAL
 
  The Company's exploration, production and marketing operations are regulated
extensively at the federal, state and local levels. Natural gas and oil
exploration, development and production activities are subject to various laws
and regulations governing a wide variety of matters. For example, hydrocarbon-
producing states have statutes or regulations addressing conservation
practices and the protection of correlative rights, and such regulations may
affect the Company's operations and limit the quantity of hydrocarbons the
Company may produce and sell. Other regulated matters include marketing,
pricing, transportation, and valuation of royalty payments.
 
  Certain operations the Company conducts are on federal oil and gas leases,
which the MMS administers. The MMS issues such leases through competitive
bidding. These leases contain relatively standardized terms and require
compliance with detailed MMS regulations and orders pursuant to the Outer
Continental Shelf Lands Act ("OCSLA"), which are subject to change by the MMS.
For offshore operations, lessees must obtain MMS approval for exploration
plans and development and production plans prior to the commencement of such
operations. In addition to permits required from other agencies (such as the
Coast Guard, the Army Corps of Engineers and the Environmental Protection
Agency), lessees must obtain a permit from the MMS prior to the commencement
of drilling. The MMS has promulgated regulations requiring offshore production
facilities located on the OCS to meet stringent engineering and construction
specifications. The MMS proposed additional safety-related regulations
concerning the design and operating procedures for OCS production platforms
and pipelines. These proposed regulations were withdrawn pending further
discussions among interested federal agencies. The MMS also has issued
regulations restricting the flaring or venting of natural gas and liquid
hydrocarbons without prior authorization. Similarly, the MMS has promulgated
regulations governing the plugging and abandonment of wells located offshore
and the removal of all production facilities. To cover the various obligations
of lessees on the OCS, the MMS generally requires that lessees post
substantial bonds or other acceptable assurances that such obligations will be
met. The cost of such bonds or other surety can be substantial and there is no
assurance that bonds or other surety can be obtained in all cases. Under
certain circumstances, the MMS may require any Company operations on federal
leases to be suspended or terminated. Any such suspension or termination could
materially and adversely affect the Company's financial condition and
operations.
 
  At the U.S. federal level, the FERC regulates interstate transportation of
natural gas under the Natural Gas Act and regulates the maximum selling prices
of certain categories of natural gas sold in "first sales" in interstate and
intrastate commerce under the Natural Gas Policy Act ("NGPA"). Effective
January 1, 1993, the Natural Gas Wellhead Decontrol Act deregulated natural
gas prices for all "first sales" of natural gas, which includes sales by
Barrett of its own production. As a result, all sales of the Company's natural
gas produced in the U.S. may be sold at market prices, unless otherwise
committed by contract. Congress could reenact price controls in the future.
See "--Natural Gas and Oil Marketing and Trading."
 
                                      35
<PAGE>
 
  The Company's natural gas sales are affected by regulation of intrastate and
interstate natural gas transportation. In an attempt to promote competition,
the FERC has issued a series of orders which have altered significantly the
marketing and transportation of natural gas. The effect of these orders has
been to enable the Company to market its natural gas production to purchasers
other than the interstate pipelines located in the vicinity of its producing
properties. The Company believes that these changes have generally improved
the Company's access to transportation and have enhanced the marketability of
its natural gas production. To date, Barrett has not experienced any material
adverse effect on natural gas marketing as a result of these FERC orders;
however, the Company cannot predict what new regulations may be adopted by the
FERC and other regulatory authorities, or what effect subsequent regulations
may have on its future natural gas marketing.
 
  The Company also is subject to laws and regulations concerning occupational
safety and health. It is not anticipated that the Company will be required in
the near future to expend amounts that are material in the aggregate to the
Company's overall operations by reason of occupational safety and health laws
and regulations, but inasmuch as such laws and regulations are frequently
changed, the Company is unable to predict the ultimate cost of compliance.
 
 ENVIRONMENTAL MATTERS
 
  The Company, as an owner or lessee and operator of natural gas and oil
properties, is subject to various federal, state and local laws and
regulations relating to discharge of materials into, and protection of, the
environment. These laws and regulations may, among other things, impose
liability and substantial penalties on the lessee under a natural gas and oil
lease for the cost of pollution clean-up resulting from operations, subject
the lessee to liability for pollution damages, require suspension or cessation
of operations in affected areas and impose restrictions on the injection of
liquid into subsurface aquifers that may contaminate groundwater. The Oil
Pollution Act of 1990, as recently amended by the Coast Guard Authorization
Act of 1996, requires operators of offshore facilities to provide financial
assurance in the amount of $35 million to cover potential environmental
cleanup and restoration costs. This amount is subject to upward regulatory
adjustment.
 
  The Company has made, and will continue to make, expenditures in its efforts
to comply with these requirements, which it believes are necessary business
costs in the oil and gas industry.The Company believes it is in substantial
compliance with applicable environmental laws and requirements and to date
such compliance has not had a material adverse effect on the earnings or
competitive position of the Company, although there can be no assurance that
significant costs for compliance will not be incurred in the future. The
Company maintains insurance coverages which it believes are customary in the
industry although it is not fully insured against many environmental risks.
See "Risk Factors--Government Regulation and Environmental Risks."
 
 TITLE TO PROPERTIES
 
  Title to properties is subject to royalty, overriding royalty, carried, net
profits, working and other similar interests and contractual arrangements
customary in the oil and gas industry, to liens for current taxes not yet due
and to other encumbrances. As is customary in the industry in the case of
undeveloped properties, little investigation of record title is made at the
time of acquisition (other than a preliminary review of local records). The
Company reviews information concerning federal and state offshore lease blocks
prior to acquisition. Drilling title opinions are always prepared before
commencement of drilling operations; however, as is customary in the industry,
the Company does not obtain drilling title opinions on offshore leases it has
received directly from the MMS.
 
 EMPLOYEES AND OFFICES
   
  The Company currently has 179 full time employees, including 12 officers
(five of whom are geologists and two of whom are petroleum engineers), 14
geologists, six geophysicists, 13 engineers,     
 
                                      36
<PAGE>
 
one environmental manager, 11 landmen, four district managers, one operations
superintendent, and administrative, clerical, accounting and field operations
personnel, none of whom is represented by organized labor unions.
 
  The Company's executive offices are located at 1515 Arapahoe Street, Tower
3, Suite 1000, Denver, Colorado 80202, and its telephone number is (303) 572-
3900. In addition, the Company maintains regional offices in Tulsa, Oklahoma
and Houston, Texas.
 
                                  MANAGEMENT
 
  The directors and executive officers of the Company, their respective
positions and ages, and the year in which each director was first elected, are
set forth in the following table. Additional information concerning each of
these individuals follows the table:
 
<TABLE>
<CAPTION>
                                                                         DIRECTOR
                         AGE          POSITION WITH THE COMPANY           SINCE
                         ---          -------------------------          --------
<S>                      <C> <C>                                         <C>
William J. Barrett       68  Chief Executive Officer, Chairman of the      1983
 (1)(2)(3)..............      Board, and a Director
C. Robert Buford         63                                                1983
 (4)(5).................     Director
Derrill Cody (4)(5)..... 58  Director                                      1995
James M. Fitzgibbons     62                                                1987
 (4)(5)(6)..............     Director
Hennie L.J.M. Gieskes    57                                                1985
 (4)(5).................     Director
William W. Grant, III    64                                                1995
 (4)....................     Director
J. Frank Keller (1)..... 53  Chief Financial Officer, Executive Vice       1983
                              President, Secretary, and a Director
Paul M. Rady............ 43  President, Chief Operating Officer, and a     1994
                              Director
A. Ralph Reed........... 59  Executive Vice President--Operations and a    1990
                              Director
James T. Rodgers         62                                                1993
 (4)(5).................     Director
Philippe S.E. Schreiber  56                                                1985
 (4)(5).................     Director
Harry S. Welch (5)...... 73  Director                                      1995
Joseph P. Barrett (2)... 43  Vice President--Land                          --
Peter A. Dea............ 43  Senior Vice President--Exploration            --
Clifford S. Foss, Jr.... 49  Vice President and General Manager--Gulf of   --
                              Mexico Region
Bryan G. Hassler........ 37  Vice President--Marketing                     --
Robert W. Howard........ 42  Senior Vice President--Finance and            --
                              Treasurer
Eugene A. Lang, Jr...... 43  Senior Vice President--General Counsel        --
Donald H. Stevens....... 44  Vice President--Corporate Relations and       --
                              Capital Markets
Maurice F. Storm........ 36  Vice President and General Manager--Mid-      --
                              Continent Region
</TABLE>
- --------
(1) William J. Barrett and J. Frank Keller are brothers-in-law.
(2) Joseph P. Barrett is the son of William J. Barrett.
(3) William J. Barrett's retirement plans include remaining as Chairman of the
    Board until January 1999 and remaining as Chief Executive Officer until
    the Company's 1997 Annual Meeting of Stockholders.
(4) Member of the Audit Committee of the Board of Directors.
(5) Member of the Compensation Committee of the Board of Directors.
(6) James M. Fitzgibbons served as a director of the Company from July 1987
    until October 1992. He was reelected to the Board of Directors in January
    1994.
 
                                      37
<PAGE>
 
  WILLIAM J. BARRETT has been Chief Executive Officer since December 1983 and
Chairman of the Board of Directors of the Company since March 1994. Mr.
Barrett was President of the Company from December 1983 through September
1994. From January 1979 to February 1982, Mr. Barrett was an independent oil
and gas operator in the western United States in association with Aeon Energy,
a partnership composed of four sole proprietorships. From 1971 to 1978, Mr.
Barrett served as Vice President--Exploration and a director of Rainbow
Resources, Inc., a publicly held independent oil and gas exploration company
that merged with a subsidiary of the Williams Companies in 1978. Mr. Barrett
served as President, Exploration Manager and Director for B&C Exploration from
1969 until 1971 and was a chief geologist for Wolf Exploration Company, now
known as Inexco Oil Co., from 1967 to 1969. He was an exploration geologist
with Pan-American Petroleum Corporation from 1963 to 1966 and worked as an
exploration geologist, a petroleum geologist and a stratigrapher for El Paso
Natural Gas Co. at various times from 1958 to 1963. Mr. Barrett's retirement
plans include remaining as Chairman of the Board until January 1999 and
remaining as Chief Executive Officer until the Company's 1997 Annual Meeting
of Stockholders.
 
  C. ROBERT BUFORD has been a director of the Company since December 1983 and
served as Chairman of the Board of Directors from December 1983 through March
1994. Mr. Buford has been President, Chairman of the Board and controlling
shareholder of Zenith Drilling Corporation ("Zenith"), Wichita, Kansas, since
February 1966. Zenith is engaged in the oil and gas business and owns
approximately 3% of the Company's Common Stock. Since 1993, Mr. Buford has
served as a director of Encore Energy, Inc., a wholly owned subsidiary of
Zenith engaged in the marketing of natural gas. Mr. Buford is also a member of
the Board of Directors of First Bancorp of Wichita, Kansas, a bank holding
company, and Lonestar Steakhouse & Saloon, Inc., a restaurant company
headquartered in Wichita, Kansas.
 
  DERRILL CODY has been a director of the Company since July 1995. Mr. Cody
was a director of Plains from May 1990 through July 1995. Since January 1990,
Mr. Cody has been an attorney in private practice in Oklahoma City, Oklahoma.
From 1986 to 1990, he was Executive Vice President of Texas Eastern
Corporation, and from 1987 to 1990 he was the Chief Executive Officer of Texas
Eastern Pipeline Company. He has been a director of the general partner of
TEPPCO Partners, L.P. since January 1990.
 
  JAMES M. FITZGIBBONS has been a director of the Company since January 1994,
and previously served as a director of the Company from July 1987 until
October 1992. Since October 1990, Mr. Fitzgibbons has been Chairman and Chief
Executive Officer of Fieldcrest Cannon, Inc., a manufacturer of home
furnishing textiles. From January 1986 until October 1990, Mr. Fitzgibbons was
President of Amoskeag Company in Boston, Massachusetts. Prior to 1986, he was
President of Howes Leather Company, a producer of leather. Mr. Fitzgibbons is
also member of the Board Of Directors of Lumber Insurance Company, American
Textile Manufacturers Institute and a Trustee of Laurel Funds, a series of
mutual funds.
 
  HENNIE L.J.M. GIESKES has been a director of the Company since November
1985. Mr. Gieskes is the Managing Director of Spaarne Compagnie N.V., a
Netherlands company engaged in the investment business. From before 1976 until
December 1990, Mr. Gieskes was a Managing Director of Vitol Beheer B.V., a
Netherlands trading company engaged primarily in energy-related commodities.
 
  WILLIAM W. GRANT, III has been a director of the Company since July 1995.
Mr. Grant was a director of Plains from May 1987 through July 1995. He has
been an advisory director of Colorado National Bankshares, Inc. and Colorado
National Bank since 1993. He was a director of Colorado National Bankshares,
Inc. from 1982 to 1993 and the Chairman of the Board of Colorado National Bank
from 1986 to 1993. He served as the Chairman of the Board of Colorado Capital
Advisors from 1989 through 1994.
 
                                      38
<PAGE>
 
  J. FRANK KELLER has been Chief Financial Officer since July 1995 and an
Executive Vice President, the Secretary and a director of the Company since
December 1983. Mr. Keller was an Executive Vice President of the Company from
December 1983 through September 1995. Mr. Keller was the President and a co-
founder of Myriam Corp., an architectural design and real estate development
firm beginning in 1976, until it was reorganized as Barrett Energy in February
1982.
 
  PAUL M. RADY has been President, Chief Operating Officer, and a director of
the Company since September 1994. Prior to that time Mr. Rady served as
Executive Vice President--Exploration of the Company beginning February 1993.
From August 1990 until July 1992, Mr. Rady served as Chief Geologist for the
Company, and from July 1992 until January 1993 he served as Exploration
Manager for the Company. From July 1980 until August 1990, Mr. Rady served in
various positions with the Denver, Colorado regional office of Amoco
Production Company ("Amoco"), the exploration and production subsidiary of
Amoco Corporation. While with Amoco, Mr. Rady's areas of responsibility
included the Rocky Mountain Basins, Utah-Wyoming Overthrust Belt, offshore
Alaska, Oklahoma, particularly with respect to the Arkoma Basin, and the New
Ventures Group, which concentrated on the western United States.
 
  A. RALPH REED has been an Executive Vice President of the Company since
November 1989 and a director of the Company since September 1990. From 1986 to
1989, Mr. Reed was an independent oil and gas operator in the Mid-Continent
region of the United States, including the period from January 1988 to
November 1989 when he acted as a consultant to Zenith. From 1982 to 1986, Mr.
Reed was President and Chief Executive Officer of Cotton Petroleum
Corporation, a wholly owned exploration and production subsidiary of United
Energy Resources, Inc. Prior to joining Cotton Petroleum Corporation in 1980,
Mr. Reed was employed by Amoco from 1962, holding various positions including
Manager of International Production, Division Production Manager and Division
Engineer.
 
  JAMES T. RODGERS has been a director of the Company since October 1993. Mr.
Rodgers served as the President, Chief Operating Officer and a director of
Anadarko Petroleum Corporation ("Anadarko") from 1986 through 1992. Anadarko
is a Houston-based oil and gas exploration and production company. Prior to
1986, Mr. Rodgers was employed in other capacities by Anadarko and Amoco. Mr.
Rodgers taught Petroleum Engineering at the University of Texas in Austin in
1958 and at Texas Tech University in Lubbock from 1958 to 1961. Mr. Rodgers
currently serves as a Director of Louis Dreyfus Natural Gas Corporation and as
an advisor to Ural Petroleum Corporation, a privately held exploration and
production company operating exclusively in the former Soviet Union.
 
  PHILIPPE S.E. SCHREIBER has been a director of the Company since November
1985. Mr. Schreiber is an independent lawyer and business consultant who also
is of counsel to the law firm of Walter, Conston, Alexander & Green, P.C. in
New York, New York. Mr. Schreiber has been affiliated with that law firm as
counsel or partner since August 1985. From 1988 to mid-1992, he also was the
Chairman of the Board and a principal shareholder of HSE, Inc., d/b/a
Manhattan Kids Limited, a privately owned corporation involved in catalogue
sales of American made children's clothing in Europe. From October 1985
through June 1992, Mr. Schreiber served as a director, and from July 1990
until June 1991 as Managing Director, of Owl Creek Investments Plc, a publicly
traded English oil and gas company.
 
  HARRY S. WELCH has been a director of the Company since July 1995. Mr. Welch
was a director of Plains from May 1986 to July 1995. Since August 1989, he has
been an attorney in private practice in Houston, Texas. He served as Vice
President and General Counsel of Texas Eastern Corporation from 1988 to July
1989.
 
                                      39
<PAGE>
 
  JOSEPH P. BARRETT has been a Vice President since March 1995 and has been
with the Company in various positions in the Land Department since 1982.
 
  PETER A. DEA has been Senior Vice President--Exploration of the Company
since June 1996. Mr. Dea served as Exploration Manager beginning August 1995.
Mr. Dea served as Chief Geologist from January 1995 to August 1995 and as
Senior Geologist from February 1994 to January 1995. Mr. Dea served as
President of Nautilus Oil and Gas Company in Denver, Colorado from 1992
through 1993. From 1982 until 1991, Mr. Dea served in various positions with
Exxon Company USA as a Geologist in the Production Department in Corpus
Christi, Texas and as a Senior Geologist and Supervisor in the Exploration
Department in Denver, Colorado. While with Exxon, Mr. Dea's areas of
responsibility included the Rocky Mountain Basins and South Texas Gulf Coast
and new ventures in the Special Trades Unit. Mr. Dea served as adjunct
Professor of Geology at Western State College, Gunnison, Colorado in the
spring semesters of 1980 and 1982.
 
  CLIFFORD S. FOSS, JR. has been General Manager of the Gulf of Mexico Region
for the Company since January 1996 and Vice President-General Manager of the
Gulf of Mexico Region for the Company since June of 1996. Prior to joining the
Company, Mr. Foss served from January 1973 to 1996 in various positions with
Cockrell Oil Corporation as Geologist, District Geologist, Exploration Manager
and Vice President of Exploration and Exploitation. Mr. Foss's primary areas
of responsibility at Cockrell Oil Corporation included the Gulf Coast and Gulf
of Mexico. Prior to January 1973, Mr. Foss served as an exploration geologist
for Cities Services Oil Company in its Gulf of Mexico Division.
 
  BRYAN G. HASSLER has been Vice-President--Marketing of the Company since
December 1996 and has been with the Company as Director of Marketing since
August 1994. Prior to joining the Company, Mr. Hassler held various positions
with Questar Corporation's exploration and production, pipeline and marketing
groups.
 
  ROBERT W. HOWARD has been Senior Vice President of the Company since March
1992. Mr. Howard served as the Executive Vice President--Finance from December
1989 until March 1992 and served as Vice President--Finance of the Company
from December 1983 until December 1989. Mr. Howard has been the Treasurer of
the Company since March 1986. During 1982, Mr. Howard was a Manager/Accountant
with Weiss & Co., a certified public accounting firm.
 
  EUGENE A. LANG, JR. has been Senior Vice President--General Counsel of the
Company since September 1995. Mr. Lang served as Senior Vice President,
General Counsel and Secretary of Plains from May 1994 to July 1995, and from
October 1990 to May 1994 he served as Vice President, General Counsel and
Secretary of Plains. From 1986 to 1990 he was an associate with the Houston,
Texas law firm of Vinson & Elkins. From 1984 to 1986, he was General Attorney
and Assistant Secretary of K N. From 1978 to 1984, he was an attorney for K N.
 
  DONALD H. STEVENS has been the Vice President--Corporate Relations and
Capital Markets for the Company since August 1992. From July 1989 until August
1992, Mr. Stevens served as Manager of Corporate and Tax Planning for
Kennecott Corporation, a mining company. From May 1986 until September 1989,
Mr. Stevens served as Corporate Planning Analyst in Corporate Acquisition and
Divestitures for BP America, Inc., formerly The Standard Oil Company. Prior to
May 1986, Mr. Stevens served in various finance, tax and analyst positions
with Seco Energy Corporation and Gulf Oil Corporation, both of which are oil
and gas companies.
 
  MAURICE F. STORM has been Vice President and General Manager of the
Company's Mid-Continent Division since July 1996. From October 1991 to July
1996 Mr. Storm was retained by the Company as a consultant to develop drilling
opportunities in the Anadarko and Arkoma Basins. From September 1984 through
October 1991 Mr. Storm worked for other independent exploration and production
companies in various exploration geologist and management positions.
 
                                      40
<PAGE>
 
                        BENEFICIAL OWNERS OF SECURITIES
 
  The following table summarizes certain information as of January 28, 1997
with respect to the ownership by each director, by all executive officers and
directors as a group, and by each other person known by the Company to be the
beneficial owner of more than 5% of the Common Stock:
 
<TABLE>
<CAPTION>
                                            NUMBER OF SHARES
        NAME OF BENEFICIAL OWNER           BENEFICIALLY OWNED  PERCENT OF CLASS
        ------------------------           ------------------  ----------------
<S>                                        <C>                 <C>
William J. Barrett.......................       390,172(1)            1.2%
C. Robert Buford.........................       652,366(2)            2.1%
Derrill Cody.............................        12,560(3)              *
James M. Fitzgibbons.....................        11,000(3)              *
Hennie L.J.M. Gieskes....................       898,714(3)            2.9%
William W. Grant, III....................        25,650(3)              *
J. Frank Keller..........................        74,036(3)              *
Eugene A. Lang, Jr.......................        49,852(3)              *
Paul M. Rady.............................        78,122(3)              *
A. Ralph Reed............................        80,328(4)              *
James T. Rodgers.........................        11,500(3)              *
Philippe S.E. Schreiber..................        19,507(3)              *
Harry S. Welch...........................        19,300(3)              *
All Directors and Executive Officers as a
 Group (20 persons)......................     2,410,993(5)            7.6%
Fidelity Management and Research
 Corporation
 82 Devonshire Street
 Boston, MA 02109........................     3,300,000(6)           10.5%
State Farm Mutual Automobile
 Insurance Company and affiliates
 One State Farm Plaza
 Bloomington, IL 61710...................     2,278,233(6)(7)         7.3%
</TABLE>
 
- --------
 * Less than 1% of the Common Stock outstanding.
(1) The number of shares indicated includes 36,292 shares owned by Louise K.
    Barrett, Mr. Barrett's wife, 230,000 shares owned by the Barrett Family
    L.L.L.P., a Colorado limited partnership for which Mr. Barrett and his
    wife are general partners and owners of an aggregate of 62.9% of the
    partnership interests, and 55,000 shares underlying options that currently
    are exercisable or become exercisable within the next 60 days. Pursuant to
    Rule 16a-1(a)(4) under the Exchange Act, Mr. Barrett disclaims ownership
    of all but 144,723 shares held by the Barrett Family L.L.L.P., which
    constitutes Mr. and Mrs. Barrett's proportionate share of the shares held
    by the Barrett Family L.L.L.P.
(2) C. Robert Buford is considered a beneficial owner of the 598,210 shares of
    which Zenith is the record owner. Mr. Buford owns approximately 89% of the
    outstanding common stock of Zenith. The number of shares of the Company's
    stock indicated for Mr. Buford also includes 10,000 shares that are owned
    by Aguilla Corporation, which is owned by Mr. Buford's wife and adult
    children. Mr. Buford disclaims beneficial ownership of the shares held by
    Aguilla Corporation pursuant to Rule 16a-1(a)(4) under the Exchange Act.
    The number of shares indicated also includes 10,500 shares underlying
    options currently exercisable.
 
                                      41
<PAGE>
 
(3) The number of shares indicated consists of or includes the following
    number of shares underlying options that currently are exercisable or that
    become exercisable within the next 60 days that are held by each of the
    following persons: Derrill Cody, 12,300; James M. Fitzgibbons, 9,000;
    Hennie L.J.M. Gieskes, 9,500; William W. Grant, III, 15,900; J. Frank
    Keller, 32,300; Eugene A. Lang, Jr., 43,259; Paul M. Rady, 48,000; James
    T. Rodgers, 11,500; Philippe S.E. Schreiber, 9,500; and Harry S. Welch,
    16,700.
(4) The number of shares indicated includes 10,150 shares owned by Mary C.
    Reed, Mr. Reed's wife and 45,048 shares underlying options that currently
    are exercisable or that become exercisable within the next 60 days.
(5) The number of shares indicated includes the shares owned by Zenith that
    are beneficially owned by Mr. Buford as described in note (2), the
    aggregate of 318,507 shares underlying the options described in notes (1),
    (2), (3) and (4), an aggregate of 25,086 shares owned by seven executive
    officers not named in the above table, and an aggregate of 62,800 shares
    underlying options that currently are exercisable or that are exercisable
    within 60 days that are held by those seven executive officers.
(6) Based on information included in a Schedule 13G filed with the Commission
    by the named stockholder and from information obtained from other sources.
(7) The number of shares indicated includes the shares owned by entities
    affiliated with State Farm Mutual Automobile Insurance Company ("SFMAI").
    Those entities and SFMAI may be deemed to constitute a "group" with regard
    to the ownership of shares reported on a Schedule 13G under the Exchange
    Act.
 
                                      42
<PAGE>
 
                             DESCRIPTION OF NOTES
 
  The Notes will be issued pursuant to an Indenture to be dated as of       ,
1997 (the "Indenture") among the Company, and Bankers Trust Company, as
trustee (the "Trustee"), a copy of the form of which is filed as an exhibit to
the Registration Statement of which this Prospectus is a part. The following
summaries of certain provisions of the Notes and the Indenture do not purport
to be complete and are subject to, and are qualified in their entirety by
reference to, the Notes and the Indenture, including the definitions therein
of certain capitalized terms used but not defined herein.
 
GENERAL
 
  Each Note will mature on    , 2007 and will bear interest at the rate per
annum stated on the cover page hereof from    , 1997 payable semiannually on
   and     of each year, commencing    , 1997, to the person in whose name the
Note is registered at the close of business on the     or     preceding such
interest payment date. Interest will be computed on the basis of a 360-day
year of twelve 30-day months. Principal and interest will be payable at the
offices of the Trustee and the Paying Agent. In addition, in the event the
Notes do not remain in book-entry form, at the option of the Company payment
of interest will be made by check mailed to the address of the person entitled
thereto as it appears in the register of the Notes (the "Note Register")
maintained by the Registrar. The aggregate principal amount of the Notes that
may be issued will be limited to $150,000,000. The Notes will be transferable
and exchangeable at the office of the Registrar and any co-registrar and will
be issued in fully registered form, without coupons, in denominations of
$1,000 and any whole multiple thereof. The Company may require payment of a
sum sufficient to cover any tax or other governmental charge payable in
connection with certain transfers and exchanges.
 
  The Notes will be senior unsecured obligations of the Company and will rank
pari passu in right of payment with the Company's obligations under all
existing and future senior unsecured indebtedness of the Company (including
the bank credit facility) and senior in right of payment to all existing and
future indebtedness of the Company that is, by its terms, expressly
subordinated to the Notes.
 
OPTIONAL REDEMPTION
 
  The Notes will be redeemable, at the option of the Company, at any time in
whole or from time to time in part, upon not less than 30 and not more than 60
days' notice mailed to each holder of Notes to be redeemed at the holder's
address appearing in the Note Register, on any date prior to maturity at a
price equal to 100% of the principal amount thereof plus accrued interest to
the Redemption Date (subject to the right of holders of record on the relevant
record date to receive interest due on an interest payment date that is on or
prior to the Redemption Date) plus a Make-Whole Premium, if any (the
"Redemption Price"). In no event will the Redemption Price ever be less than
100% of the principal amount of the Notes plus accrued interest to the
Redemption Date.
 
  The amount of the Make-Whole Premium with respect to any Note (or portion
thereof) to be redeemed will be equal to the excess, if any, of:
 
  (i) the sum of the present values, calculated as of the Redemption Date, of:
 
   A. each interest payment that, but for such redemption, would have been
      payable on the Note (or portion thereof) being redeemed on each
      Interest Payment Date occurring after the Redemption Date (excluding
      any accrued interest for the period prior to the Redemption Date); and
   B. the principal amount that, but for such redemption, would have been
      payable at the final maturity of the Note (or portion thereof) being
      redeemed;
 
  over
 
  (ii)the principal amount of the Note (or portion thereof) being redeemed.
 
                                      43
<PAGE>
 
  The present values of interest and principal payments referred to in clause
(i) above will be determined in accordance with generally accepted principles
of financial analysis. Such present values will be calculated by discounting
the amount of each payment of interest or principal from the date that each
such payment would have been payable, but for the redemption, to the
Redemption Date at a discount rate equal to the Treasury Yield (as defined
below) plus     basis points.
 
  The Make-Whole Premium will be calculated by an independent investment
banking institution of national standing appointed by the Company; provided,
that if the Company fails to make such appointment at least 45 business days
prior to the Redemption Date, or if the institution so appointed is unwilling
or unable to make such calculation, such calculation will be made by Goldman,
Sachs & Co. or, if such firm is unwilling or unable to make such calculation,
by an independent investment banking institution of national standing
appointed by the Trustee (in any such case, an "Independent Investment
Banker").
 
  For purposes of determining the Make-Whole Premium, "Treasury Yield" means a
rate of interest per annum equal to the weekly average yield to maturity of
United States Treasury Notes that have a constant maturity that corresponds to
the remaining term to maturity of the Notes, calculated to the nearest 1/12th
of a year (the "Remaining Term"). The Treasury Yield will be determined as of
the third business day immediately preceding the applicable Redemption Date.
 
  The weekly average yields of United States Treasury Notes will be determined
by reference to the most recent statistical release published by the Federal
Reserve Bank of New York and designated "H.15(519) Selected Interest Rates" or
any successor release (the "H.15 Statistical Release"). If the H.15
Statistical Release sets forth a weekly average yield for United States
Treasury Notes having a constant maturity that is the same as the Remaining
Term, then the Treasury Yield will be equal to such weekly average yield. In
all other cases, the Treasury Yield will be calculated by interpolation, on a
straight-line basis, between the weekly average yields on the United States
Treasury Notes that have a constant maturity closest to and greater than the
Remaining Term and the United States Treasury Notes that have a constant
maturity closest to and less than the Remaining Term (in each case as set
forth in the H.15 Statistical Release). Any weekly average yields so
calculated by interpolation will be rounded to the nearest 1/100th of 1%, with
any figure of 1/200% or above being rounded upward. If weekly average yields
for United States Treasury Notes are not available in the H.15 Statistical
Release or otherwise, then the Treasury Yield will be calculated by
interpolation of comparable rates selected by the Independent Investment
Banker.
 
  If less than all of the Notes are to be redeemed, the Trustee will select
the Notes to be redeemed by such method as the Trustee shall deem fair and
appropriate. The Trustee may select for redemption Notes and portions of Notes
in amounts of $1,000 or whole multiples of $1,000.
 
  The Notes will not be entitled to the benefit of any sinking fund or other
mandatory redemption provisions.
 
CERTAIN COVENANTS
 
  LIMITATION ON LIENS. Nothing in the Indenture or the Notes will in any way
limit the amount of indebtedness or securities (other than the Notes) that the
Company or any of its Subsidiaries may incur or issue. The Indenture will
provide that the Company will not, and will not permit any Restricted
Subsidiary to, issue, assume or guarantee any Indebtedness for borrowed money
secured by any Lien on any property or asset now owned or hereafter acquired
by the Company or such Restricted Subsidiary without making effective
provision whereby any and all Notes then or thereafter outstanding will be
secured by a Lien equally and ratably with any and all other obligations
thereby secured for so long as any such obligations shall be so secured.
 
                                      44
<PAGE>
 
  The foregoing restriction will not, however, apply to:
 
    (a) Liens existing on the date on which the Notes are originally issued
  or provided for under the terms of agreements existing on such date;
 
    (b) Liens on property securing (i) all or any portion of the cost of
  exploration, drilling or development of such property, (ii) all or any
  portion of the cost of acquiring, constructing, altering, improving or
  repairing any property or assets, real or personal, or improvements used or
  to be used in connection with such property or (iii) Indebtedness incurred
  by the Company or any Restricted Subsidiary to provide funds for the
  activities set forth in clauses (i) and (ii) above;
 
    (c) Liens securing Indebtedness owed by a Restricted Subsidiary to the
  Company or to any other Restricted Subsidiary;
 
    (d) Liens on property existing at the time of acquisition of such
  property by the Company or a Subsidiary or Liens on the property of any
  corporation or other entity existing at the time such corporation or other
  entity becomes a Restricted Subsidiary of the Company or is merged with the
  Company in compliance with the Indenture and in either case not incurred as
  a result of (or in connection with or in anticipation of) the acquisition
  of such property or such corporation or other entity becoming a Restricted
  Subsidiary of the Company or being merged with the Company, provided that
  such Liens do not extend to or cover any property or assets of the Company
  or any of its Restricted Subsidiaries other than the property so acquired;
 
    (e) Liens on any property securing (i) Indebtedness incurred in
  connection with the construction, installation or financing of pollution
  control or abatement facilities or other forms of industrial revenue bond
  financing or (ii) Indebtedness issued or guaranteed by the United States or
  any State thereof or any department, agency or instrumentality of either;
 
    (f) any Lien extending, renewing or replacing (or successive extensions,
  renewals or replacements of) any Lien of any type permitted under clauses
  (a) through (e) above, provided that such Lien extends to or covers only
  the property that is subject to the Lien being extended, renewed or
  replaced;
 
    (g) certain Liens arising in the ordinary course of business of the
  Company and the Restricted Subsidiaries;
 
    (h) any Lien resulting from the deposit of moneys or evidences of
  indebtedness in trust for the purpose of defeasing Indebtedness of the
  Company or any Subsidiary; or
 
    (i) Liens (exclusive of any Lien of any type otherwise permitted under
  clauses (a) through (h) above) securing Indebtedness of the Company or any
  Restricted Subsidiary in an aggregate principal amount which, together with
  the aggregate amount of Attributable Indebtedness deemed to be outstanding
  in respect of all Sale/Leaseback Transactions entered into pursuant to
  clause (a) of the covenant described under "Limitation on Sale/Leaseback
  Transactions" below (exclusive of any such Sale/Leaseback Transactions
  otherwise permitted under clauses (a) through (h) above), does not at the
  time such Indebtedness is incurred exceed 5% of the Consolidated Net
  Tangible Assets of the Company (as shown in the most recent audited
  consolidated balance sheet of the Company and its Subsidiaries).
 
  The following types of transactions will not be prohibited or otherwise
limited by the foregoing covenant: (i) the sale, granting of Liens with
respect to, or other transfer of, crude oil, natural gas or other petroleum
hydrocarbons in place for a period of time until, or in an amount such that,
the transferee will realize therefrom a specified amount (however determined)
of money or of such crude oil, natural gas or other petroleum hydrocarbons;
(ii) the sale or other transfer of any other interest in property of the
character commonly referred to as a production payment, overriding royalty,
forward sale or similar interest; (iii) the entering into of Currency Hedge
Obligations, Interest Rate Hedging Agreements or Oil and Gas Hedging Contracts
although Liens securing any Indebtedness for borrowed money that is the
subject of any such obligation shall not be permitted hereby unless permitted
under
 
                                      45
<PAGE>
 
clauses (a) through (i) above; and (iv) the granting of Liens required by any
contract or statute in order to permit the Company or any Restricted
Subsidiary to perform any contract or subcontract made by it with or at the
request of the United States or any State thereof or any department, agency or
instrumentality of either, or to secure partial, progress, advance or other
payments to the Company or any Restricted Subsidiary by such governmental unit
pursuant to the provisions of any contract or statute.
 
  LIMITATION ON SALE/LEASEBACK TRANSACTIONS. The Indenture will provide that
the Company will not, and will not permit any Restricted Subsidiary to, enter
into any Sale/Leaseback Transaction with any person (other than the Company or
a Restricted Subsidiary) unless:
 
    (a) the Company or such Restricted Subsidiary would be entitled to incur
  Indebtedness, in a principal amount equal to the Attributable Indebtedness
  with respect to such Sale/Leaseback Transaction, secured by a Lien on the
  property subject to such Sale/Leaseback Transaction pursuant to the
  covenant described under "Limitation on Liens" above without equally and
  ratably securing the Notes pursuant to such covenant;
 
    (b) after the date on which the Notes are originally issued and within a
  period commencing six months prior to the consummation of such
  Sale/Leaseback Transaction and ending six months after the consummation
  thereof, the Company or such Restricted Subsidiary shall have expended for
  property used or to be used in the ordinary course of business of the
  Company and the Restricted Subsidiaries (including amounts expended for the
  exploration, drilling or development thereof, and for additions,
  alterations, repairs and improvements thereto) an amount equal to all or a
  portion of the net proceeds of such Sale/Leaseback Transaction and the
  Company shall have elected to designate such amount as a credit against
  such Sale/Leaseback Transaction (with any such amount not being so
  designated to be applied as set forth in clause (c) below); or
 
    (c) the Company, during the 12-month period after the effective date of
  such Sale/Leaseback Transaction, shall have applied to the voluntary
  defeasance or retirement of Notes or any Pari Passu Indebtedness an amount
  equal to the greater of the net proceeds of the sale or transfer of the
  property leased in such Sale/Leaseback Transaction and the fair value, as
  determined by the Board of Directors of the Company, of such property at
  the time of entering into such Sale/Leaseback Transaction (in either case
  adjusted to reflect the remaining term of the lease and any amount expended
  by the Company as set forth in clause (b) above), less an amount equal to
  the principal amount of Notes and Pari Passu Indebtedness voluntarily
  defeased or retired by the Company within such 12-month period and not
  designated as a credit against any other Sale/ Leaseback Transaction
  entered into by the Company or any Restricted Subsidiary during such
  period.
   
  SUBSIDIARY GUARANTORS. Upon issuance, the Notes will not be guaranteed by
any Subsidiary of the Company. The Indenture will provide that if any
Subsidiary of the Company guarantees any Funded Indebtedness of the Company at
any time in the future, then the Company will cause the Notes to be equally
and ratably guaranteed by such Subsidiary.     
 
LIMITATIONS ON MERGERS AND CONSOLIDATIONS
 
  The Indenture will provide that the Company will not consolidate or merge
with or into any Person, or sell, lease, convey or otherwise dispose of all or
substantially all of its assets, or assign any of its obligations under the
Indenture or under the Notes, to any Person, unless: (i) the Person formed by
or surviving such consolidation or merger (if other than the Company), or to
which such sale, lease, conveyance or other disposition or assignment shall be
made (collectively, the "Successor"), is a corporation organized and existing
under the laws of the United States or any State thereof or the District of
Columbia and the Successor assumes by supplemental indenture in a form
satisfactory to the Trustee all of the obligations of the Company under the
Indenture and under the Notes; and (ii) immediately after giving effect to
such transaction, no Default or Event of Default shall have occurred and be
continuing.
 
                                      46
<PAGE>
 
CERTAIN DEFINITIONS
 
  The following is a summary of certain defined terms to be used in the
Indenture. Reference is made to the Indenture for the full definition of all
such terms and for the definitions of other capitalized terms used herein and
not defined below.
 
  "Attributable Indebtedness", when used with respect to any Sale/Leaseback
Transaction, means, as at the time of determination, the present value
(discounted at a rate equivalent to the Company's then current weighted
average cost of funds for borrowed money as at the time of determination,
compounded on a semi-annual basis) of the total obligations of the lessee for
rental payments during the remaining term of the lease included in such
Sale/Leaseback Transaction (including any period for which such lease can be
extended).
 
  "Capitalized Lease Obligation" of any Person means any obligation of such
Person to pay rent or other amounts under a lease of property, real or
personal, that is required to be capitalized for financial reporting purposes
in accordance with generally accepted accounting principles; and the amount of
such obligation shall be the capitalized amount thereof determined in
accordance with generally accepted accounting principles.
 
  "Consolidated Net Tangible Assets" means, for the Company and its Restricted
Subsidiaries on a consolidated basis determined in accordance with generally
accepted accounting principles, the aggregate amounts of assets (less
depreciation and valuation reserves and other reserves and items deductible
from gross book value of specific asset accounts under generally accepted
accounting principles) that would be included on a balance sheet after
deducting therefrom (a) all liability items except deferred income taxes,
commercial paper, short term bank indebtedness, Funded Indebtedness, other
long-term liabilities and shareholders' equity and (b) all goodwill, trade
names, trademarks, patents, unamortized debt discount and expense and other
like intangibles.
 
  "Currency Hedge Obligations" means, at any time as to any Person, the
obligations of such Person at such time that were incurred in the ordinary
course of business pursuant to any foreign currency exchange agreement, option
or futures contract or other similar agreement or arrangement designed to
protect against or manage such Person's or any of its Subsidiaries' exposure
to fluctuations in foreign currency exchange rates.
 
  "Funded Indebtedness" means all Indebtedness (including Indebtedness
incurred under any revolving credit, letter of credit or working capital
facility) that matures by its terms, or that is renewable at the option of any
obligor thereon to a date, more than one year after the date on which such
Indebtedness is originally incurred.
 
  "Indebtedness" of any Person at any date means, without duplication, (i) all
indebtedness of such Person for borrowed money (whether or not the recourse of
the lender is to the whole of the assets of such Person or only to a portion
thereof), (ii) all obligations of such Person evidenced by bonds, debentures,
notes or other similar instruments, (iii) all obligations of such Person in
respect of letters of credit or other similar instruments (or reimbursement
obligations with respect thereto), other than standby letters of credit
incurred by such Person in the ordinary course of business, (iv) all
obligations of such Person to pay the deferred and unpaid purchase price of
property or services, except trade payables and accrued expenses incurred in
the ordinary course of business, (v) all Capitalized Lease Obligations of such
Person, (vi) all Indebtedness of others secured by a Lien on any asset of such
Person, whether or not such Indebtedness is assumed by such Person, (vii) all
Indebtedness of others guaranteed by such Person to the extent of such
guarantee and (viii) all obligations of such Person in respect of Currency
Hedge Obligations, Interest Rate Hedging Agreements and Oil and Gas Hedging
Contracts.
 
                                      47
<PAGE>
 
  "Interest Rate Hedging Agreements" means, with respect to any Person, the
obligations of such Person under (i) interest rate swap agreements, interest
rate cap agreements and interest rate collar agreements and (ii) other
agreements or arrangements designed to protect such Person or any of its
Subsidiaries against fluctuations in interest rates.
 
  "Lien" means, with respect to any asset, any mortgage, lien, pledge, charge,
security interest or encumbrance of any kind in respect of such asset
(including, without limitation, any production payment, advance payment or
similar arrangement with respect to minerals in place), whether or not filed,
recorded or otherwise perfected under applicable law. For the purposes of the
Indenture, the Company or any Restricted Subsidiary shall be deemed to own
subject to a Lien any asset which it has acquired or holds subject to the
interest of a vendor or lessor under any conditional sale agreement,
Capitalized Lease Obligation (other than any Capitalized Lease Obligation
relating to any building, structure, equipment or other property used or to be
used in the ordinary course of business of the Company and the Restricted
Subsidiaries) or other title retention agreement relating to such asset.
 
  "Oil and Gas Hedging Contracts" means any oil and gas purchase or hedging
agreement, and other agreement or arrangement, in each case, that is designed
to provide protection against oil and gas price fluctuations.
 
  "Pari Passu Indebtedness" means any Indebtedness of the Company, whether
outstanding on the date on which the Notes are originally issued or thereafter
created, incurred or assumed, unless, in the case of any particular
Indebtedness, the instrument creating or evidencing the same or pursuant to
which the same is outstanding expressly provides that such Indebtedness shall
be subordinated in right of payment to the Notes.
 
  "Restricted Subsidiary" means each of the existing Subsidiaries of the
Company and any Subsidiary of the Company that is a successor corporation of
any of the existing Subsidiaries, except for BGP Inc. The status of any
Subsidiary of the Company as a Restricted Subsidiary shall continue so long as
it is a Subsidiary of the Company.
 
  "Sale/Leaseback Transaction" means any arrangement with any Person providing
for the leasing by the Company or any Restricted Subsidiary, for a period of
more than three years, of any real or tangible personal property, which
property has been or is to be sold or transferred by the Company or such
Restricted Subsidiary to such Person in contemplation of such leasing.
 
EVENTS OF DEFAULT
 
  An Event of Default will be defined in the Indenture as being: (i) default
by the Company for 30 days in payment of any interest on the Notes; (ii)
default by the Company in any payment of principal of or premium, if any, on
the Notes; (iii) default by the Company in performance of any other covenant
or agreement in the Notes, or the Indenture which shall not have been remedied
within 60 days after written notice by the Trustee or by the holders of at
least 25% in principal amount of the Notes then outstanding; (iv) the
acceleration of the maturity of any Indebtedness of the Company or any
Restricted Subsidiary (other than the Notes) having an outstanding principal
amount of $5 million or more individually or in the aggregate, or a default in
the payment of any principal or interest in respect of any Indebtedness of the
Company or any Restricted Subsidiary (other than the Notes) having an
outstanding principal amount of $5 million or more individually or in the
aggregate and such default shall be continuing for a period of 30 days without
the Company or such Restricted Subsidiary, as the case may be, effecting a
cure of such default; (v) failure by the Company or any Restricted Subsidiary
to pay final, non-appealable judgments aggregating in excess of $10 million,
which judgments are not paid, discharged or stayed for a period of 60 days; or
(vi) certain events involving bankruptcy, insolvency or reorganization of the
Company or any Restricted Subsidiary. The Indenture will provide
 
                                      48
<PAGE>
 
that the Trustee may withhold notice to the holders of the Notes of any
default (except in payment of principal of, or premium, if any, or interest on
the Notes) if the Trustee considers it in the interest of the holders of the
Notes to do so.
 
  The Indenture will provide that if an Event of Default occurs and is
continuing with respect to the Indenture, the Trustee or the holders of not
less than 25% in principal amount of the Notes outstanding may declare the
principal of and premium, if any, and accrued and unpaid interest on all the
Notes to be due and payable. Upon such a declaration, such principal, premium,
if any, and interest will be due and payable immediately. If an Event of
Default relating to certain events of bankruptcy, insolvency or reorganization
of the Company or any Restricted Subsidiary occurs and is continuing, the
principal of and premium, if any, and interest on all the Notes will become
and be immediately due and payable without any declaration or other act on the
part of the Trustee or any holders of the Notes. The amount due and payable on
the acceleration of any Note will be equal to 100% of the principal amount of
such Note, plus accrued interest to the date of payment. Under certain
circumstances, the holders of a majority in principal amount of the
outstanding Notes may rescind any such acceleration with respect to the Notes
and its consequences.
 
  The Indenture will provide that no holder of a Note may pursue any remedy
under the Indenture unless (i) the Trustee shall have received written notice
of a continuing Event of Default, (ii) the Trustee shall have received a
request from holders of at least 25% in principal amount of the Notes to
pursue such remedy, (iii) the Trustee shall have been offered indemnity
satisfactory to it and (iv) the Trustee shall have failed to act for a period
of 60 days after receipt of such notice and offer of indemnity; however, such
provision does not affect the right of a holder of a Note to sue for
enforcement of any overdue payment thereon.
 
  The holders of a majority in principal amount of the Notes then outstanding
will have the right to direct the time, method and place of conducting any
proceeding for exercising any remedy available to the Trustee under the
Indenture, subject to certain limitations specified in the Indenture. The
Indenture will require the annual filing by the Company with the Trustee of a
written statement as to compliance with the covenants contained in the
Indenture.
 
MODIFICATION AND WAIVER
 
  The Indenture will provide that modifications and amendments to the
Indenture or the Notes may be made by the Company, and the Trustee with the
consent of the holders of a majority in principal amount of the Notes then
outstanding; provided that no such modification or amendment may, without the
consent of the holder of each Note then outstanding affected thereby, (i)
reduce the percentage in principal amount of Notes whose holders must consent
to an amendment, supplement or waiver; (ii) reduce the rate of or change the
time for payment of interest, including default interest, on any Note; (iii)
reduce the principal of or change the fixed maturity of any Note or alter the
premium or other provisions with respect to redemption; (iv) make any Note
payable in money other than that stated in the Note; (v) impair the right to
institute suit for the enforcement of any payment of principal of, or premium,
if any, or interest on, any Note; (vi) make any change in the percentage of
principal amount of Notes necessary to waive compliance with certain
provisions of the Indenture; or (vii) waive a continuing Default or Event of
Default in the payment of principal of, or premium, if any, or interest on the
Notes. The Indenture will provide that modifications and amendments of the
Indenture may be made by the Company, and the Trustee without the consent of
any holders of Notes in certain limited circumstances, including (a) to cure
any ambiguity, omission, defect or inconsistency, (b) to provide for the
assumption of the obligations of the Company under the Indenture upon the
merger, consolidation or sale or other disposition of all or substantially all
of the assets of the Company, (c) to provide for uncertificated Notes in
addition to or in place of certificated Notes, (d) to comply with any
requirement in order to effect or maintain the qualification of the Indenture
under the Trust Indenture Act of 1939 or (e) to make any change that does not
adversely affect the rights of any holder of Notes in any material respect.
 
                                      49
<PAGE>
 
  The Indenture will provide that the holders of a majority in aggregate
principal amount of the Notes then outstanding may waive any past default
under the Indenture, except a default in the payment of principal, or premium,
if any, or interest.
 
DISCHARGE AND TERMINATION
 
  DEFEASANCE OF CERTAIN OBLIGATIONS. The Indenture will provide that the
Company may terminate certain of its obligations under the Indenture,
including those described under the section "Certain Covenants," if (i) the
Company irrevocably deposits in trust with the Trustee money or U.S.
Government Obligations sufficient to pay principal of and interest on the
Notes to maturity, and to pay all other sums payable by it under the
Indenture, provided that the Trustee shall have been irrevocably instructed to
apply such money or the proceeds of such U.S. Government Obligations to the
payment of said principal and interest with respect to the Notes as the same
shall become due; (ii) the Company delivers to the Trustee an Officers'
Certificate stating that all conditions precedent to satisfaction and
discharge of the Indenture have been complied with, and an Opinion of Counsel
to the same effect; (iii) no Default or Event of Default shall have occurred
and be continuing on the date of such deposit; and (iv) the Company shall have
delivered to the Trustee an Opinion of Counsel from nationally recognized
counsel acceptable to the Trustee or a tax ruling to the effect that the
holders of the Notes will not recognize income, gain or loss for Federal
income tax purposes as a result of the Company's exercise of its option under
such section and will be subject to Federal income tax on the same amount and
in the same manner and at the same times as would have been the case if such
option had not been exercised. In order to have money available on a payment
date to pay principal of or interest on the Notes, the U.S. Government
Obligations shall be payable as to principal or interest on or before such
payment date in such amounts as will provide the necessary money. U.S.
Government Obligations shall not be callable at the issuer's option. The
Company's payment obligation shall survive until the Notes are no longer
outstanding.
 
  DISCHARGE. The Indenture will provide that the Indenture shall cease to be
of further effect (subject to certain exceptions relating to compensation and
indemnity of the Trustee and repayment to the Company of excess money or
securities) when (i) either (A) all outstanding Notes theretofore
authenticated and issued (other than destroyed, lost or stolen Notes that have
been replaced or paid) have been delivered to the Trustee for cancellation; or
(B) all outstanding Notes not theretofore delivered to the Trustee for
cancellation: (x) have become due and payable, or (y) will become due and
payable at their stated maturity within one year or (z) are to be called for
redemption within one year under arrangements satisfactory to the Trustee for
the giving of notice of redemption by the Trustee in the name, and at the
expense, of the Company, and the Company, in the case of clause (x), (y) or
(z) above, has deposited or caused to be deposited with the Trustee as funds
(immediately available to the holders in the case of clause (x) ) in trust for
such purpose an amount which, together with earnings thereon, will be
sufficient to pay and discharge the entire indebtedness on such Notes for
principal, premium, if any, and interest to the date of such deposit (in the
case of Notes which have become due and payable) or to the stated maturity or
Redemption Date, as the case may be; (ii) the Company has paid or caused to be
paid all other sums payable by it under the Indenture; and (iii) the Company
has delivered to the Trustee an Officers' Certificate stating that all
conditions precedent to satisfaction and discharge of the Indenture have been
complied with, together with an Opinion of Counsel to the same effect.
 
GOVERNING LAW
 
  The Indenture will provide that it will be governed by, and construed in
accordance with, the laws of the State of New York.
 
THE TRUSTEE
 
  Bankers Trust Company will be the Trustee under the Indenture. Its address
is Four Albany Street, New York, New York 10006. The Company has also
appointed the Trustee as the initial Registrar and as the initial Paying Agent
under the Indenture.
 
                                      50
<PAGE>
 
  The Indenture will contain certain limitations on the right of the Trustee,
should it become a creditor of the Company, to obtain payment of claims in
certain cases, or to realize on certain property received in respect of any
such claim as security or otherwise. In the event the Trustee acquires any
conflicting interest (as defined in the Trust Indenture Act of 1939), however,
it must eliminate such conflict or resign.
 
  The Indenture will provide that in case an Event of Default shall occur (and
be continuing), the Trustee will be required to use the degree of care and
skill of a prudent man in the conduct of his own affairs. The Trustee will be
under no obligation to exercise any of its powers under the Indenture at the
request of any of the holders of the Notes, unless such holders shall have
offered the Trustee indemnity reasonably satisfactory to it.
 
BOOK-ENTRY, DELIVERY AND FORM
 
  The Notes to be sold as set forth herein will be issued in the form of a
fully registered Global Certificate (the "Global Certificate"). The Global
Certificate will be deposited on the date of the closing of the sale of the
Notes offered hereby (the "Closing Date") with, or on behalf of, The
Depository Trust Company (the "Depositary") and registered in the name of its
nominee (such nominee being referred to herein as the "Global Certificate
Holder") or will remain in the custody of the Trustee pursuant to a FAST
Balance Certificate Agreement or similar agreement between the Depositary and
the Trustee.
 
  Except as set forth below, the Global Certificate may be transferred, in
whole and not in part, only to another nominee of the Depositary or to a
successor of the Depositary or its nominee.
 
  The Depositary has advised the Company and the Underwriters as follows: It
is a limited-purpose trust company which was created to hold securities for
its participating organizations (the "Participants") and to facilitate the
clearance and settlement of transactions in such securities between
Participants through electronic book-entry changes in accounts of its
Participants. Participants include securities brokers and dealers (including
the Underwriters), banks, trust companies, clearing corporations and certain
other organizations. Access to the Depositary's book-entry system is also
available to others, such as banks, brokers, dealers and trust companies that
clear through or maintain a custodial relationship with a Participant, either
directly or indirectly ("indirect participants"). Persons who are not
Participants may beneficially own securities held by the Depositary only
through Participants or indirect participants.
 
  The Depositary has also advised that pursuant to procedures established by
it (i) upon the issuance by the Company of the Notes, the Depositary will
credit the accounts of Participants designated by the Underwriters with the
principal amount of the Notes purchased by the Underwriters, and (ii)
ownership of beneficial interests in the Global Certificate will be shown on,
and the transfer of that ownership will be effected only through, records
maintained by the Depositary (with respect to Participants' interests), the
Participants and the indirect participants. The laws of some states require
that certain persons take physical delivery in definitive form of securities
which they own. Consequently, the ability to transfer beneficial interests in
the Global Certificate is limited to such extent.
 
  All payments on the Global Certificate registered in the name of the
Depositary's nominee will be made by the Company through the Paying Agent to
the Depositary's nominee as the registered owner of the Global Certificate.
Under the terms of the Indenture, the Company and the Trustee will treat the
persons in whose names the Notes are registered as the owners of such Notes
for the purpose of receiving payments of principal and interest on such Notes
and for all other purposes whatsoever. Therefore, neither the Company, the
Trustee nor the Paying Agent has any direct responsibility or liability for
the payment of principal or interest on the Notes to owners of beneficial
interests in the Global Certificate. The Depositary has advised the Company
and the Trustee that its present practice is, upon receipt of any payment of
principal or interest, to credit immediately the accounts of the
 
                                      51
<PAGE>
 
Participants with payment in amounts proportionate to their respective
holdings in principal amount of beneficial interests in the Global Certificate
as shown on the records of the Depositary. Payments by Participants and
indirect participants to owners of beneficial interests in the Global
Certificate will be governed by standing instructions and customary practices,
as is now the case with securities held for the accounts of customers in
bearer form or registered in "street name" and will be the responsibility of
such Participants or indirect participants.
 
  The Company will issue Notes in definitive form in exchange for the Global
Certificate if, and only if, either (1) the Depositary is at any time
unwilling or unable to continue as depositary and a successor depositary is
not appointed by the Company within 90 days, (2) an Event of Default has
occurred and is continuing and the Registrar has received a request from the
Depositary to issue Notes in definitive form in lieu of all or a portion of
the Global Certificate (in which case the Company shall deliver Notes in
definitive form within 30 days of such request), or (3) the Company determines
not to have the Notes represented by a Global Certificate. In any instance, an
owner of a beneficial interest in the Global Certificate will be entitled to
have Notes equal in principal amount to such beneficial interest registered in
its name and will be entitled to physical delivery of such Notes in definitive
form. Notes so issued in definitive form will be issued in denominations of
$1,000 and integral whole multiples thereof and will be issued in registered
form only, without coupons.
 
  So long as the Global Certificate Holder is the registered owner of the
Global Certificate, the Global Certificate Holder will be considered the sole
Holder under the Indenture of any Notes evidenced by the Global Certificates.
Beneficial owners of Notes evidenced by the Global Certificate will not be
considered the owners or Holders thereof under the Indenture for any purpose,
including with respect to the giving of any directions, instructions or
approvals to the Trustee thereunder. Neither the Company nor the Trustee will
have any responsibility or liability for any aspect of the records of the
Depositary or for maintaining, supervising or reviewing any records of the
Depositary relating to the Notes.
 
SETTLEMENT AND PAYMENT
 
  Settlement for the Notes will be made by the Underwriters in immediately
available funds. If the total outstanding principal amount of the Notes is
represented by a Global Certificate, all payments of principal of and any
premium and interest on the Notes will be made by the Company in immediately
available funds; otherwise, payments on definitive physical certificates will
be made in U.S. Clearing House funds. Secondary market trading activity in the
Notes will also settle in immediately available funds.
 
 
                                      52
<PAGE>
 
                                 UNDERWRITING
 
  Subject to the terms and conditions of the Underwriting Agreement, the
Company has agreed to sell to each of the Underwriters named below, and each
of such Underwriters has severally agreed to purchase from the Company, the
aggregate principal amount of Notes set forth opposite its name below:
 
<TABLE>
<CAPTION>
                                                                PRINCIPAL AMOUNT
                           UNDERWRITER                              OF NOTES
                           -----------                          ----------------
   <S>                                                          <C>
   Goldman, Sachs & Co. .......................................
   Chase Securities Inc........................................
   Lehman Brothers Inc.........................................
   Petrie Parkman & Co., Inc...................................
                                                                  ------------
     Total.....................................................   $150,000,000
                                                                  ============
</TABLE>
 
  Under the terms and conditions of the Underwriting Agreement, the
Underwriters are committed to take and pay for all of the Notes, if any are
taken.
 
  The Underwriters propose to offer the Notes in part directly to the public
at the initial public offering price set forth on the cover page of this
Prospectus and in part to certain securities dealers at such price less a
concession of  % of the principal amount of the Notes. The Underwriters may
allow, and such dealers may reallow, a concession not to exceed  % of the
principal amount of the Notes to certain brokers and dealers. After the Notes
are released for sale to the public, the offering price and other selling
terms may from time to time be varied by the Underwriters.
 
  The Notes are a new issue of securities with no established trading market.
The Company has been advised by the Underwriters that the Underwriters intend
to make a market in the Notes but are not obligated to do so and may
discontinue market making at any time without notice. No assurance can be
given as to the liquidity of the trading market for the Notes.
 
  The Company has agreed to indemnify the several Underwriters against certain
liabilities, including liabilities under the Securities Act.
 
  Under Rule 2710(c)(8) of the National Association of Securities Dealers,
Inc. (the "NASD"), Chase Securities Inc. may be deemed to have a conflict of
interest with the Company because more than 10% of the net proceeds of the
sale of the Notes is expected to be paid to an affiliate of such Underwriter
in its capacity as a lender under the Company's bank credit facility. See "Use
of Proceeds." This Offering is being conducted in accordance with Rule
2710(c)(8), which provides that, among other things, when an NASD member
participates in the underwriting of debt securities of a company with which it
or its associated persons, parent or affiliates have a conflict of interest,
the yield to maturity can be no lower than that recommended by a "qualified
independent underwriter" meeting certain standards. In accordance with this
requirement, Goldman, Sachs & Co. will serve in such role and will recommend a
minimum yield to maturity in compliance with the requirements of Rule
2710(c)(8). Goldman, Sachs & Co. will receive compensation from the Company in
the amount of $10,000 for serving in such role. In connection with the
Offering, Goldman, Sachs & Co. in its role as qualified independent
underwriter has performed due diligence investigations and reviewed and
participated in the preparation of this Prospectus and the Registration
Statement of which this Prospectus forms a part.
 
  Goldman, Sachs & Co. provided Plains, and Petrie Parkman & Co., Inc.
provided the Company with investment banking services in connection with the
merger of Plains and the Company. Goldman, Sachs & Co. and Petrie Parkman &
Co., Inc. each provided the Company with investment banking services in
connection with the public offering of 5.4 million shares of the Company's
common stock in June 1996.
 
                                      53
<PAGE>
 
                                 LEGAL MATTERS
 
  Certain legal matters regarding the Offering have been passed upon on behalf
of the Company by Bearman Talesnick & Clowdus Professional Corporation,
Denver, Colorado. Attorneys employed by that law firm beneficially own
approximately 14,700 shares of the Company's common stock. Vinson & Elkins
L.L.P., Houston, Texas, as special counsel to the Company, has passed upon the
validity of the issuance of the Notes. Certain legal matters in connection
with the Notes will be passed upon for the Underwriters by Andrews & Kurth
L.L.P., New York, New York.
 
                                    EXPERTS
 
  The consolidated financial statements and schedules of the Company as of
December 31, 1995 and 1994 and for each of the three years in the period ended
December 31, 1995 included in this Prospectus and elsewhere in the
Registration Statement of which this Prospectus forms a part have been audited
by Arthur Andersen LLP, independent public accountants, as indicated in their
reports with respect thereto, and are included herein in reliance upon the
authority of such firm as experts in giving such reports.
   
  The information included and incorporated by reference herein regarding the
total proved reserves of the Company was prepared by the Company. With respect
to the reserve estimates as of and prior to December 31, 1995, a portion was
reviewed by Ryder Scott Company and the remaining portion was reviewed or
prepared by Netherland, Sewell & Associates, Inc., as stated in their
respective letter reports with respect thereto. The reserve estimates as of
December 31, 1996 were reviewed solely by Ryder Scott Company. The reserve
review letters of Ryder Scott Company and Netherland, Sewell & Associates,
Inc. are filed as exhibits to the Registration Statement of which this
Prospectus is a part, in reliance upon the authority of said firms as experts
with respect to the matters covered by their reports and the giving of their
reports.     
 
                             AVAILABLE INFORMATION
 
  This Prospectus constitutes a part of a Registration Statement on Form S-3
(herein together with all amendments thereto referred to as the "Registration
Statement") filed by the Company with the
Commission under the Securities Act. This Prospectus does not contain all the
information set forth in the Registration Statement and exhibits thereto, and
statements included in this Prospectus as to the content of any contract or
other document referred to are not necessarily complete. For further
information, reference is made to the Registration Statement and to the
exhibits and schedules filed therewith. All these documents may be inspected
at the Commission's principal office in Washington, D.C. without charge, and
copies of them may be obtained from the Commission upon payment of prescribed
fees. Statements contained in this Prospectus as to the contents of any
contract or other document filed as an exhibit to the Registration Statement
are not necessarily complete, and in each instance reference is hereby made to
the copy of such contract or other document filed as an exhibit to the
Registration Statement, each such statement being qualified in all respects by
such reference.
 
  The Company is subject to the informational requirements of the Exchange
Act, and, in accordance therewith files reports, proxy statements and other
information with the Commission. Such reports, proxy statements and other
information can be inspected and copied at the public reference facilities
maintained by the Commission at 450 Fifth Street, N.W., Washington, D.C.
20549, Room 1024 and at the following Regional Offices of the Commission: 500
West Madison Street, Suite 1400, Chicago, Illinois 60661-2511, and 7 World
Trade Center, New York, New York 10048. Copies of such material also can be
obtained at prescribed rates by writing to the Commission, Public Reference
Section, 450 Fifth Street, N.W., Washington, D.C. 20549. In addition, such
material may also be
 
                                      54
<PAGE>
 
inspected and copied at the offices of the New York Stock Exchange, Inc., 20
Broad Street, New York, New York 10005. In addition, such materials filed
electronically by the Company with the Commission are available at the
Commission's World Wide Web site at http://www.sec.gov.
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
  The following documents that previously were, or are required in the future
to be, filed with the Commission (File No. 1-13446) pursuant to the Exchange
Act are incorporated herein by reference:
 
    (i) the Company's Annual Report on Form 10-K for the year ended December
  31, 1995;
 
    (ii) the Company's Quarterly Reports on Form 10-Q for each of the
  quarters ended March 31, 1996, June 30, 1996, and September 30, 1996;
     
    (iii) the Company's Current Reports on Form 8-K dated each of June 20,
  1996, November 4, 1996, January 8, 1997 and February 10, 1997;     
 
    (iv) the description of the Company's Common Stock contained in the
  Company's registration statement on Form 8-A as filed with the Commission
  on October 27, 1994;
 
    (v) the Company's Proxy Statement dated April 11, 1996 concerning the
  Company's Annual Meeting of Stockholders held June 5, 1996; and
 
    (vi) all documents filed by the Company pursuant to Sections 13(a),
  13(c), 14 or 15(d) of the Exchange Act subsequent to the date of this
  Prospectus and prior to the termination of the offering made hereby.
 
  Any statement contained in a document incorporated by reference herein shall
be deemed to be modified or superseded for purposes of this Prospectus to the
extent that such statement is modified or replaced by a statement contained in
this Prospectus or in any other subsequently filed document that also is or is
deemed to be incorporated by reference into this Prospectus. Any such
statement so modified or superseded shall not be deemed, except as so modified
or replaced, to constitute a part of this Prospectus. The Company will provide
without charge to each person to whom a copy of this Prospectus has been
delivered, upon the written or oral request of any such person, a copy of any
or all of the documents referred to above that have been or may be
incorporated in this Prospectus by reference, other than exhibits to such
documents. Written or oral requests for such copies should be directed to
Donald H. Stevens, Vice President, Barrett Resources Corporation, 1515
Arapahoe Street, Tower 3, Suite 1000, Denver, Colorado 80202, (303) 572-3900.
 
                              CERTAIN DEFINITIONS
 
  Unless otherwise indicated in this Prospectus, natural gas volumes are
stated at the legal pressure base of the state or area in which the reserves
are located at 60(degrees) Fahrenheit. Natural gas equivalents are determined
using the ratio of six Mcf of natural gas to one barrel of crude oil,
condensate or natural gas liquids so that one barrel of oil is referred to as
six Mcf of natural gas equivalent or "Mcfe."
 
  As used in this Prospectus, the following terms have the following specific
meanings: "Mcf" means thousand cubic feet, "MMcf" means million cubic feet,
"Bcf" means billion cubic feet, "Bbl" means barrel, "MBbl" means thousand
barrels, "Mcfe" means thousand cubic feet equivalent, "MMcfe" means million
cubic feet equivalent, and "MMBtu" means million British thermal units.
 
  With respect to information concerning the Company's working interests in
wells or drilling locations, "gross" natural gas and oil wells or "gross"
acres is the number of wells or acres in which the Company has an interest,
and "net" gas and oil wells or "net" acres are determined by multiplying
"gross" wells or acres by the Company's working interest in those wells or
acres. A working interest in
 
                                      55
<PAGE>
 
an oil and natural gas lease is an interest that gives the owner the right to
drill, produce, and conduct operating activities on the property and to
receive a share of production of any hydrocarbons covered by the lease. A
working interest in an oil and gas lease also entitles its owner to a
proportionate interest in any well located on the lands covered by the lease,
subject to all royalties, overriding royalties and other burdens, to all costs
and expenses of exploration, development and operation of any well located on
the lease, and to all risks in connection therewith.
 
  "Behind-pipe recompletion" is the completion of an existing well for
production from a formation that exists behind the casing of the well.
 
  "Capital expenditures" means costs associated with exploratory and
development drilling (including exploratory dry holes); leasehold
acquisitions; seismic data acquisitions; geological, geophysical and land
related overhead expenditures; delay rentals; producing property acquisitions;
and other miscellaneous capital expenditures. "Capital expenditure budget"
means an estimate prepared by management for the total expenditures
anticipated to be incurred during the subject time period. This amount can
deviate or fluctuate due to the timing of drilling of wells, environmental
considerations, acquisition of key fee, state and federal leases, and natural
gas and oil prices. "Reserve replacement cost" means the cost to the Company
of additions to the Company's reserve base divided by the aggregate costs of
developing or acquiring those additional reserves.
 
  A "development well" is a well drilled as an additional well to the same
horizon or horizons as other producing wells on a prospect, or a well drilled
on a spacing unit adjacent to a spacing unit with an existing well capable of
commercial production and which is intended to extend the proven limits of a
prospect. An "exploratory well" is a well drilled to find commercially
productive hydrocarbons in an unproved area, or to extend significantly a
known prospect.
 
  A "farmout" is an assignment to another party of an interest in a drilling
location and related acreage conditional upon the drilling of a well on that
location. A "farm-in" is an assignment by the owner of a working interest in
an oil and gas lease of the working interest or a portion thereof to another
party who desires to drill on the leased acreage. Generally, the assignee is
required to drill one or more wells in order to earn its interest in the
acreage. The assignor usually retains a royalty or reversionary working
interest in the lease. The assignee is said to have "farmed-in" the acreage.
 
  "Present value of estimated future net revenues" means the present value of
estimated future revenues to be generated from the production of proved
reserves calculated in accordance with Commission guidelines, net of estimated
production and future development costs, using prices and costs as of the date
of estimation without future escalation, without giving effect to non-property
related expenses such as general and administrative expenses, debt service,
future income tax expense and depreciation, depletion and amortization, and
discounted using an annual discount rate of 10%.
 
  "Reserves" means natural gas and crude oil, condensate and natural gas
liquids on a net revenue interest basis, found to be commercially recoverable.
"Proved developed reserves" includes proved developed producing reserves and
proved developed behind-pipe reserves. "Proved developed producing reserves"
includes only those reserves expected to be recovered from existing completion
intervals in existing wells. "Proved developed behind-pipe reserves" includes
those reserves that exist behind the casing of existing wells when the cost of
making such reserves available for production is relatively small compared to
the cost of a new well. "Proved undeveloped reserves" includes those reserves
expected to be recovered from new wells on proved undrilled acreage or from
existing wells where a relatively major expenditure is required for
recompletion.
 
 
                                      56
<PAGE>
 
                   INDEX TO CONSOLIDATED FINANCIAL STATEMENTS
 
Report Of Independent Public Accountants.................................   F-2

Consolidated Balance Sheets as of September 30, 1996 (unaudited) and at
 December 31, 1995 and 1994..............................................   F-3

Consolidated Statements Of Income for the nine months ended September 30,
 1996 and 1995 (unaudited) and each of the three years in the period
 ended December 31, 1995.................................................   F-4

Consolidated Statements Of Stockholders' Equity for the nine months ended
 September 30, 1996 and 1995 (unaudited) and each of the three years in
 the period ended December 31, 1995......................................   F-5

Consolidated Statements Of Cash Flows for the nine months ended September
 30, 1996 and 1995 (unaudited) and each of the three years in the period
 ended December 31, 1995.................................................   F-6

Notes to the Consolidated Financial Statements...........................   F-7

Supplemental Oil And Gas Information.....................................  F-23
 
                                      F-1
<PAGE>
 
                         REPORT OF ARTHUR ANDERSEN LLP
 
                        INDEPENDENT PUBLIC ACCOUNTANTS
 
The Board of Directors
Barrett Resources Corporation
Denver, Colorado 80202
 
  We have audited the accompanying consolidated balance sheets of Barrett
Resources Corporation (a Delaware corporation) and subsidiaries as of December
31, 1995 and 1994, and the related consolidated statements of income,
stockholders' equity and cash flows for each of the three years in the period
ended December 31, 1995. These financial statements are the responsibility of
the Company's management. Our responsibility is to express an opinion on these
financial statements based on our audits.
 
  We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to
obtain reasonable assurance about whether the financial statements are free of
material misstatement. An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements. An audit
also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for our opinion.
 
  In our opinion, the financial statements referred to above present fairly,
in all material respects, the financial position of Barrett Resources
Corporation and subsidiaries as of December 31, 1995 and 1994, and the results
of their operations and their cash flows for each of the three years in the
period ended December 31, 1995, in conformity with generally accepted
accounting principles.
 
  As explained in Note 8 to the financial statements, effective January 1,
1993, the Company changed its method of accounting for postretirement
benefits.
 
                                          Arthur Andersen LLP
 
Denver, Colorado
March 1, 1996
 
                                      F-2
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
                          CONSOLIDATED BALANCE SHEETS
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                DECEMBER 31,
                                              ------------------  SEPTEMBER 30,
                                                1994      1995        1996
                                              --------  --------  -------------
                                                                   (UNAUDITED)
<S>                                           <C>       <C>       <C>
                   ASSETS
Current assets:
  Cash and cash equivalents.................. $ 12,348  $  7,529    $  9,446
  Receivables, net...........................   34,522    31,089      38,680
  Inventory..................................      643       554         962
  Other current assets.......................    1,099       574         886
                                              --------  --------    --------
    Total current assets.....................   48,612    39,746      49,974
Net property and equipment (full cost
 method).....................................  261,424   300,666     422,168
Other assets.................................      916       --          --
                                              --------  --------    --------
                                              $310,952  $340,412    $472,142
                                              ========  ========    ========
    LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
  Accounts payable........................... $ 24,587  $ 14,369    $ 14,860
  Amounts payable to oil and gas property
   owners....................................   16,091    13,366      16,199
  Accrued and other liabilities..............    5,468     8,325      16,913
                                              --------  --------    --------
    Total current liabilities................   46,146    36,060      47,972
Long term debt...............................   53,000    89,000      12,000
Deferred income taxes........................   21,726    23,524      48,595
Postretirement benefits......................      927       --          --
Other long term liabilities..................    1,017       --          --
Commitments and contingencies--Note 10
Stockholders' equity
  Preferred stock, $.001 par value: 1,000,000
   shares authorized, none outstanding.......      --        --          --
  Common stock, $.01 par value: 35,000,000
   shares authorized, 31,319,193 outstanding
   (25,092,246 and 24,694,669 at December 31,
   1995 and 1994, respectively...............      247       251         313
Additional paid-in capital...................   78,628    86,154     241,407
Retained earnings............................  109,304   105,890     122,849
Treasury stock, at cost......................      (43)     (467)       (994)
                                              --------  --------    --------
    Total stockholders' equity...............  188,136   191,828     363,575
                                              --------  --------    --------
                                              $310,952  $340,412    $472,142
                                              ========  ========    ========
</TABLE>
 
                            (See accompanying notes)
 
                                      F-3
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
                       CONSOLIDATED STATEMENTS OF INCOME
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                             NINE MONTHS ENDED
                                 YEARS ENDED DECEMBER 31,      SEPTEMBER 30,
                                ---------------------------  ------------------
                                  1993      1994     1995      1995      1996
                                --------  -------- --------  --------  --------
                                                                (UNAUDITED)
<S>                             <C>       <C>      <C>       <C>       <C>
Revenues:
  Oil and gas production......  $ 80,911  $ 78,794 $ 96,996   $70,481  $102,412
  Trading revenues............    22,955    28,114   28,554    20,156    30,547
  Revenue from gas gathering..       216       353    1,074       917     1,996
  Interest income.............       736       864      714       529       633
  Other income................     1,254     1,333      678       594       465
                                --------  -------- --------  --------  --------
                                 106,072   109,458  128,016    92,677   136,053
Operating expenses:
  Lease operating expenses....    30,383    28,223   34,525    25,418    34,027
  Depreciation, depletion and
   amortization...............    20,185    22,760   33,480    23,625    31,859
  Cost of trading.............    21,675    27,190   27,611    19,385    28,449
  General and administrative..    11,194    13,261   13,426    10,255    11,212
  Interest expense............       725       942    4,631     3,284     3,154
  Other expenses, net.........       867       645      588       568       --
  Merger and reorganization
   expense....................       --        --    14,161    13,207       --
                                --------  -------- --------  --------  --------
                                  85,029    93,021  128,422    95,742   108,701
                                --------  -------- --------  --------  --------
Income (loss) before income
 taxes and cumulative effect
 of change in method of
 accounting for postretirement
 benefits.....................    21,043    16,437     (406)   (3,065)   27,352
Provision for income taxes....     6,721     5,138    1,834     2,812    10,393
                                --------  -------- --------  --------  --------
Income (loss) before
 cumulative effect of change
 in method of accounting for
 postretirement benefits......    14,322    11,299   (2,240)   (5,877)   16,959
Cumulative effect of change in
 accounting for postretirement
 benefits, net of tax.........      (656)      --       --        --        --
                                --------  -------- --------  --------  --------
Net income (loss).............  $ 13,666  $ 11,299 $ (2,240) $ (5,877) $ 16,959
                                ========  ======== ========  ========  ========
Net income (loss) per common
 share and common share
 equivalent before change in
 method of accounting for
 postretirement benefits......  $   0.58  $   0.46 $  (0.09) $  (0.23) $   0.62
Net income (loss) per common
 share and common share
 equivalent--cumulative
 effect.......................  $  (0.03) $     -- $     --  $    --   $    --
                                --------  -------- --------  --------  --------
Net income (loss) per common
 share and common share
 equivalent...................  $   0.55  $   0.46 $  (0.09) $  (0.23) $   0.62
                                ========  ======== ========  ========  ========
</TABLE>
 
                            (See accompanying notes)
 
                                      F-4
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
                CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                     ADDITIONAL                        TOTAL
                              COMMON  PAID-IN   TREASURY RETAINED  STOCKHOLDERS'
                              STOCK   CAPITAL    STOCK   EARNINGS     EQUITY
                              ------ ---------- -------- --------  -------------
<S>                           <C>    <C>        <C>      <C>       <C>
Balances, October 1, 1992 as
 previously reported........   $ 97   $ 39,651   $ --    $  3,567    $ 43,315
Effect of change to December
 31 year end
  Net income for the three
   month period ending
   December 31, 1992........    --         --      --       1,333       1,333
  Pooling of interests with
   Plains Petroleum
   Company..................    128     19,163     --      84,144     103,435
                               ----   --------   -----   --------    --------
Balance, December 31, 1992
 as restated................    225     58,814     --      89,044     148,083
  Exercise of stock
   options..................      1        515    (204)       --          312
  Issuance of common stock..     20     18,881     --         --       18,901
  Cash dividends--Plains
   common stock.............    --         --      --      (2,352)     (2,352)
  Net income for the year
   ended December 31, 1993..    --         --      --      13,666      13,666
                               ----   --------   -----   --------    --------
Balance, December 31, 1993..    246     78,210    (204)   100,358     178,610
  Exercise of stock
   options..................      1        970    (313)       --          658
  Purchase of treasury
   stock....................    --         --      (78)       --          (78)
  Retirement of treasury
   stock....................    --        (552)    552        --          --
  Cash dividends--Plains
   common stock.............    --         --      --      (2,353)     (2,353)
  Net income for the year
   ended December 31, 1994..    --         --      --      11,299      11,299
                               ----   --------   -----   --------    --------
Balance, December 31, 1994..    247     78,628     (43)   109,304     188,136
  Exercise of stock
   options..................      4      7,690    (588)       --        7,106
  Retirement of treasury
   stock....................    --        (164)    164        --          --
  Cash dividends--Plains
   common stock.............    --         --      --      (1,174)     (1,174)
  Net loss for the year
   ended December 31, 1995..    --         --      --      (2,240)     (2,240)
                               ----   --------   -----   --------    --------
Balance, December 31, 1995..    251     86,154    (467)   105,890     191,828
  Exercise of stock
   options..................      2      3,801    (527)       --        3,276
  Issuance of common stock..     60    151,452     --         --      151,512
  Net income for the nine
   months ended September
   30, 1996 (unaudited).....    --         --      --      16,959      16,959
                               ----   --------   -----   --------    --------
Balance, September 30,
 1996.......................   $313   $241,407   $(994)  $122,849    $363,575
                               ====   ========   =====   ========    ========
</TABLE>
 
                            (See accompanying notes)
 
                                      F-5
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                            NINE MONTHS ENDED
                               YEAR ENDED DECEMBER 31,        SEPTEMBER 30,
                              ----------------------------  -------------------
                                1993      1994      1995      1995      1996
                              --------  --------  --------  --------  ---------
                                                               (UNAUDITED)
<S>                           <C>       <C>       <C>       <C>       <C>
Cash flows from operations:
  Net income (loss).........  $ 13,666  $ 11,299  $ (2,240) $ (5,877) $  16,959
  Adjustments needed to
   reconcile to net cash
   flow provided by
   operations:
    Depreciation, depletion
     and amortization.......    20,185    22,760    33,480    23,625     31,859
    Unrealized (gain) loss
     on trading.............      (124)       58     1,139       --      (1,138)
    Deferred income taxes...     5,975     4,788     1,798     2,543      9,778
    Other...................       782        70      (787)     (770)       --
                              --------  --------  --------  --------  ---------
                                40,484    38,975    33,390    19,521     57,458
    Change in current assets
     and liabilities:
      Accounts receivable...    (4,304)   (8,436)    3,433     9,505     (7,246)
      Other current assets..      (209)     (148)      525       432       (416)
      Accounts payable......    (1,870)    6,803      (524)  (15,305)       457
      Amounts due oil and
       gas property owners..     5,640       623    (2,725)     (942)     7,325
      Accrued and other
       liabilities..........     1,839    (1,244)    1,439     3,242      5,132
                              --------  --------  --------  --------  ---------
Net cash flow provided by
 operations.................    41,580    36,573    35,538    16,453     62,710
Cash flows from investing
 activities:
  Proceeds from sale of oil
   and gas properties.......    16,210       458       504       209      1,992
  Purchase of short-term in-
   vestments................    (5,952)  (11,322)      --        --         --
  Maturity of short-term in-
   vestments................     1,984    15,290       --        --         --
  Acquisition of property
   and equipment............   (45,488)  (95,589)  (82,758)  (46,945)  (124,054)
  Other.....................        65       146       --        --         --
                              --------  --------  --------  --------  ---------
Net cash flow used in in-
 vesting
 activities.................   (33,181)  (91,017)  (82,254)  (46,736)  (122,062)
Cash flows from financing
 activities:
  Proceeds from issuance of
   common stock.............    19,212       301     7,071     6,413    138,269
  Purchase of treasury
   stock....................       --        (78)      --        --         --
  Borrowing under line of
   credit...................     1,300    44,000   115,000    69,000     33,000
  Payments on line of cred-
   it.......................    (7,800)   (4,500)  (79,000)  (37,000)  (110,000)
  Dividends paid............    (2,352)   (2,353)   (1,174)   (1,179)       --
  Other.....................       868      (147)      --       (767)       --
                              --------  --------  --------  --------  ---------
Net cash flow provided by
 financing
 activities.................    11,228    37,223    41,897    36,467     61,269
Increase (decrease) in cash
 and cash equivalents.......    19,627   (17,221)   (4,819)    6,184      1,917
Cash and cash equivalents at
 beginning of period........     9,942    29,569    12,348    12,348      7,529
                              --------  --------  --------  --------  ---------
Cash and cash equivalents at
 end of period..............  $ 29,569  $ 12,348  $  7,529  $ 18,532  $   9,446
                              ========  ========  ========  ========  =========
</TABLE>
 
                            (See accompanying notes)
 
                                      F-6
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
                  NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
                 (INFORMATION FOR THE NINE MONTH PERIODS ENDED
                   SEPTEMBER 30, 1996 AND 1995 IS UNAUDITED)
 
1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
 Business
 
  Barrett Resources Corporation (the "Company") is an independent natural gas
and oil exploration and production company with producing properties located
in the mid-continent states and Rocky Mountain region of the United States.
Barrett also operates gas gathering systems and related facilities in the
areas which are synergistic to the Company's production. Barrett has a gas
marketing and trading subsidiary, which allows the Company to market the
Company's natural gas production and to purchase and sell other companies'
natural gas.
 
 Principles of consolidation
 
  The consolidated financial statements include the accounts of the Company
and its subsidiaries, all of which are wholly-owned. All significant
intercompany transactions have been eliminated in consolidation. Certain
reclassifications have been made to 1993 and 1994 amounts to conform to the
1995 presentation.
 
 Use of estimates
 
  The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities at the
date of the financial statements and the reported amounts of revenues and
expenses during the reporting period. Actual results could differ from those
estimates. There are many factors, including global events, that may influence
the production, processing, marketing, and valuation of crude oil and natural
gas. A reduction in the valuation of oil and gas properties resulting from
declining prices or production could adversely impact depletion rates and
ceiling test limitations.
 
 Partnerships
 
  The consolidated financial statements include the Company's proportionate
share of the assets, liabilities, revenues and expenses of its oil and gas
partnership interests.
 
 Cash and cash equivalents
 
  Cash in excess of daily requirements is invested in money market accounts
and commercial paper with maturities of three months or less. Such investments
are deemed to be cash equivalents for purposes of the consolidated statements
of cash flows. The carrying amount of cash equivalents approximates fair value
because of the short maturity of those instruments.
 
 Oil and gas properties
 
  The Company utilizes the full cost method of accounting for oil and gas
properties whereby all productive and nonproductive costs paid to third
parties that are incurred in connection with the acquisition, exploration and
development of oil and gas reserves are capitalized. No gains or losses are
recognized upon the sale, conveyance or other disposition of oil and gas
properties except in extraordinary transactions.
 
                                      F-7
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
                 (INFORMATION FOR THE NINE MONTH PERIODS ENDED
                   SEPTEMBER 30, 1996 AND 1995 IS UNAUDITED)
 
 
  Capitalized costs are accumulated on a country-by-country basis subject to a
cost center ceiling and amortized using the units-of-production method. The
Company presently has only one cost center since all of its properties are
located in the United States. Amortizable costs include developmental drilling
in progress as well as estimates of future development costs of proved
reserves but exclude the costs of unevaluated oil and gas properties.
Accumulated depreciation and amortization is written off as assets are
retired. Depletion and amortization equaled approximately $.55, $.52 and $.48
per Mcfe ($3.28, $3.14 and $2.87 per BOE) during the years ended December 31,
1995, 1994 and 1993, respectively.
 
  The Company capitalizes interest costs on amounts expended on assets during
the period in which activities are occurring to place the asset in service.
Amounts spent to develop properties included in the full cost center of oil
and gas properties are excluded from the interest capitalization computation.
 
  The Company acquires nonproducing acreage for its exploration and
development activities. The cost of these leases is included in unevaluated
oil and gas property costs recorded at the lower of cost or fair market value.
 
  The Company operates many of the wells in which it owns an economic
interest. The operating agreements for these activities provide for a fee
structure to allow the Company to recover a portion of its direct and overhead
charges related to its operating activities. The fees collected under the
operating agreements are recorded as a reduction of general and administrative
expenses. Any amounts collected from a sale of oil and gas interests or earned
as a result of assembling oil and gas drilling activities are applied to
reduce the book value of oil and gas properties.
 
 Other property and equipment
 
  Other property and equipment is recorded at cost. Renewals and betterments
which substantially extend the useful life of the assets are capitalized.
Maintenance and repairs are expensed when incurred. Depreciation is provided
using accelerated and straight-line methods over the estimated useful lives,
ranging from five to ten years, of the assets.
 
 Amounts payable to oil and gas property owners
 
  Amounts payable to oil and gas property owners consist of cash calls from
working interest owners to pay for development costs of properties being
currently developed, production revenue that the Company, as operator, is
collecting and distributing to revenue interest owners and production revenue
taxes that the Company, as operator, has withheld for timely payment to the
tax agencies.
 
 Trading and hedging activities
 
  The Company's business activities include buying and selling of natural gas.
The Company recognizes revenue and costs on gas trading transactions at the
point in time when gas is delivered to the purchaser.
 
  The Company uses both commodity futures contracts and price swaps to hedge
the impact of price fluctuations on a portion of its production and trading
activities. The Company enters into a
 
                                      F-8
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
                 (INFORMATION FOR THE NINE MONTH PERIODS ENDED
                   SEPTEMBER 30, 1996 AND 1995 IS UNAUDITED)
 
hedging position for specific transactions that management deems expose the
Company to an unacceptable market price risk. Price swaps or commodities
transactions without corresponding scheduled physical transactions (scheduled
physical transactions include committed trading activities or production from
producing wells) do not qualify for hedge accounting. The Company classifies
these positions as trading positions and records these instruments at fair
value. Gains and losses are recognized as fair values fluctuate from time to
time compared to cost.
 
  Gains or losses on hedging transactions are deferred until the physical
transaction occurs for financial reporting purposes. Deferred gains and losses
and unrealized gains and losses are evaluated in connection with the physical
transaction underlying the hedge position. Hedging gains or losses
significantly exceeding the price movement of the underlying physical
transaction are recorded in the consolidated statements of income in the
period in which the lack of correlation occurred. Gains or losses on hedging
activities are recorded in the consolidated statements of income as
adjustments of the revenue or cost of the underlying physical transaction.
Hedging transactions are reported as operating activities in the consolidated
statements of cash flows.
 
 Earnings per share
 
  Per share amounts were computed using the weighted average number of shares
of common stock and common stock equivalents outstanding during each year:
1995--24,931,000; 1994--24,967,000 and 1993--24,778,000. Options to purchase
stock are included as common stock equivalents, when dilutive, using the
treasury stock method.
 
 Change in fiscal year
 
  On July 18, 1995, the Company changed its fiscal year-end from September 30
to December 31. A transition report for the period October 1, 1994 through
December 31, 1994 was filed with the Securities and Exchange Commission.
During the three months ended December 31, 1994, the Company reported revenues
of $15 million and net income of $207,000.
 
 Unaudited financial statements:
 
  In the opinion of management, the accompanying unaudited consolidated
condensed financial statements contain all adjustments necessary to present
fairly the financial position of the Company as of September 30, 1996 and the
results of operations and cash flows for the periods presented. All such
adjustments are of a normal recurring nature. Certain information and footnote
disclosures normally included in financial statements prepared in accordance
with generally accepted accounting principles have been condensed or omitted
pursuant to the SEC's rules and regulations. The results of operations for the
periods presented are not necessarily indicative of the results for the full
year.
 
2. MERGER
 
  On July 18, 1995 Plains Petroleum Company ("Plains") was merged with and
into a subsidiary of the Company, resulting in Plains becoming a wholly-owned
subsidiary of the Company. Approximately 12.8 million shares of the Company's
common stock were issued in exchange for all of the outstanding common stock
of Plains. Additionally, outstanding options to acquire Plains common stock
were converted to options to acquire approximately 593,000 shares of the
Company's common stock. In
 
                                      F-9
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
                 (INFORMATION FOR THE NINE MONTH PERIODS ENDED
                   SEPTEMBER 30, 1996 AND 1995 IS UNAUDITED)
 
connection with the merger, the Company's authorized number of shares of
common stock was increased to 35 million. The merger was accounted for as a
pooling of interests, and accordingly, the accompanying financial statements
have been restated to include the accounts and operations of Plains for all
periods prior to the merger.
 
  Plains used the successful efforts method of accounting for its oil and gas
exploration and development activities. In conjunction with the merger, Plains
adopted the full cost method used by the Company resulting in increases of net
property and equipment due to the capitalization of exploration costs,
reversal of impairment and adjustments of depreciation, depletion and
amortization expense for periods prior to the merger. The financial statements
for 1994 and 1993 have been retroactively restated for the change in
accounting method which resulted in increased net income. Retained earnings
and deferred income taxes have been adjusted for the effect of the retroactive
application of the new method.
 
  Certain reclassifications have been made to the historical consolidated
financial statements of the separate companies to conform the financial
statements to a comparable presentation. There were no intercompany
transactions between the Company and Plains. Separate results for the periods
preceding the merger, including the conversion to full cost for Plains and the
change to a December 31 year-end for the Company, were as follows (in 000's):
 
<TABLE>
<CAPTION>
         SIX MONTH PERIOD ENDED
              JUNE 30, 1995            BARRETT PLAINS(1) ADJUSTMENTS(2) COMBINED
         ----------------------        ------- --------- -------------- --------
                                          (UNAUDITED)
   <S>                                 <C>     <C>       <C>            <C>
   Net revenues....................... $29,277  $35,823         --      $ 65,100
   Net income.........................   2,200    3,771         --         5,971
<CAPTION>
   12 MONTH PERIOD ENDED               9/30/94 12/31/94                 12/31/94
   ---------------------               ------- ---------                --------
   <S>                                 <C>     <C>       <C>            <C>
   Net revenues....................... $41,252  $63,024     $ 5,182     $109,458
   Net income.........................   4,439    7,768        (908)      11,299
<CAPTION>
   12 MONTH PERIOD ENDED               9/30/93 12/31/93                 12/31/93
   ---------------------               ------- ---------                --------
   <S>                                 <C>     <C>       <C>            <C>
   Net revenues....................... $42,686  $64,998     $(1,612)    $106,072
   Net income.........................   5,756    8,128        (218)      13,666
</TABLE>
- --------
(1) Restated to full cost to conform accounting policies.
(2) To conform year ends.
 
  In connection with the merger, approximately $14.2 million of merger and
reorganization costs and expenses were incurred and have been charged to
expense in the Company's third and fourth quarters of fiscal 1995. These
nonrecurring costs and expenses consist of (1) investment banker and
professional fees of $7.4 million; (2) severance and employee benefit costs of
$5.6 million for approximately 38 employees, terminated through consolidation
of administrative and operational functions; (3) a non-cash credit of
approximately $.9 million associated with the termination of Plains'
postretirement benefit plans and other related benefit plans and (4) other
merger and reorganization related costs of $2.1 million.
 
                                     F-10
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
                 (INFORMATION FOR THE NINE MONTH PERIODS ENDED
                   SEPTEMBER 30, 1996 AND 1995 IS UNAUDITED)
 
 
3. RECEIVABLES
 
<TABLE>
<CAPTION>
                                                                 DECEMBER 31,
                                                                ---------------
                                                                 1994    1995
                                                                ------- -------
                                                                (IN THOUSANDS)
   <S>                                                          <C>     <C>
   Oil and gas revenue receivable.............................. $13,257 $15,535
   Joint interest billings.....................................  14,542   7,652
   Trading receivables.........................................   6,483   5,665
   Other accounts receivable...................................     240   2,237
                                                                ------- -------
                                                                $34,522 $31,089
                                                                ======= =======
</TABLE>
 
  The Company's accounts receivable are primarily due from medium size oil and
gas entities in the Rocky Mountain region. Collection of joint interest
billings is generally secured by future production. The Company performs
periodic credit evaluations of customers purchasing production for which no
collateral is required. Historically, the Company has not experienced
significant losses related to these extensions of credit.
 
  As of December 31, 1995 and 1994, receivables are recorded net of allowance
for doubtful accounts of $201,000 and $224,000, respectively.
 
4. PROPERTY AND EQUIPMENT
 
<TABLE>
<CAPTION>
                                                               DECEMBER 31,
                                                             -----------------
                                                               1994     1995
                                                             -------- --------
                                                              (IN THOUSANDS)
   <S>                                                       <C>      <C>
   Oil and gas properties, full cost method:
     Unevaluated costs, not being amortized................. $ 12,611 $ 10,579
     Evaluated costs........................................  346,950  420,784
     Gas gathering systems..................................    8,388    8,815
   Furniture, vehicles and equipment........................    9,765    9,801
                                                             -------- --------
                                                              377,714  449,979
   Less accumulated depreciation, depletion, amortization
    and impairment..........................................  116,290  149,313
                                                             -------- --------
                                                             $261,424 $300,666
                                                             ======== ========
</TABLE>
 
  The Company capitalized interest costs of $403,000 in 1995 with respect to
qualifying properties. Total interest costs incurred after recognition of the
capitalized interest amount was $4.6 million in 1995.
 
                                     F-11
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
                 (INFORMATION FOR THE NINE MONTH PERIODS ENDED
                   SEPTEMBER 30, 1996 AND 1995 IS UNAUDITED)
 
 
5. UNEVALUATED OIL AND GAS PROPERTY COSTS
 
  Unevaluated oil and gas property costs consist of the following:
 
<TABLE>
<CAPTION>
                                                      COSTS INCURRED DURING
                                                 -------------------------------
                                                 1992 1993  1994   1995   TOTAL
                                                 ---- ---- ------ ------ -------
                                                         (IN THOUSANDS)
<S>                                              <C>  <C>  <C>    <C>    <C>
Acquisition costs............................... $71  $--  $2,130 $5,623 $ 7,824
Exploration costs...............................  11   32      53  2,659   2,755
                                                 ---  ---  ------ ------ -------
                                                 $82  $32  $2,183 $8,282 $10,579
                                                 ===  ===  ====== ====== =======
</TABLE>
 
  The unevaluated costs were incurred for projects which are being explored.
The Company anticipates that substantially all unevaluated costs will be
classified as evaluated costs within the next three years.
 
6. LONG-TERM DEBT
 
  The Company has a reserve-based line of credit with a group of banks which
provides up to $200 million for a four year period ending July 19, 1999. The
amount actually available to the Company under the line at any given time is
limited to the collateral value of proved reserves as determined by the
lenders. Based on the lenders' determination of collateral value, as of
December 31, 1995 (which was based on the March 31, 1995 and December 31, 1994
reserve reports), the Company has a borrowing limit of $160 million. In order
to reduce the commitment fees, the Company voluntarily requested that the
lenders limit the maximum borrowing to $90 million through December 31, 1995.
Subsequent to December 31, 1995, the lenders increased the collateral value to
$205 million based on the June 30, 1996 reserve report. The lenders also
extended the maturity date to October 31, 2000. The Company is required to pay
interest only during the revolving period. At its option, the Company has
elected to use the London interbank eurodollar rate (LIBOR) plus a spread
ranging from 0.5% to 1.0% (depending on the Company's indebtedness relative to
its borrowing base) for a substantial portion of the outstanding balance. As
of December 31, 1995 the Company's outstanding balance under the line of
credit was $89 million of which $83 million was accruing interest at an
average LIBOR based rate of 6.62% and $6 million was accruing interest on a
prime based rate of 8.50%. The line of credit agreement restricts the payment
of dividends, borrowings, sale of assets, loans to others, investment and
merger activity over certain limits without the prior consent of the bank and
requires the Company to maintain certain net worth and debt to equity levels.
Based on the variable borrowing rates and re-pricing terms currently available
to the Company for the line of credit, management believes the fair value of
long-term debt approximates the carrying value. As of September 30, 1996, the
Company's outstanding balance under the line of credit was $12 million, all of
which was accruing interest at an average rate of six percent.
 
7. OPTIONS
 
  The Company has two employee stock option plans, a 1990 Plan and a 1994
Plan, under which the Company's common stock may be granted to officers and
employees of the Company and subsidiaries. The 1990 Plan, as amended, provided
for the granting of 775,000 shares. The 1994 Plan provides for the granting of
400,000 shares of the Company's common stock. In addition, the Company has a
non-discretionary stock option plan under which options for an aggregate of
100,000 shares of
 
                                     F-12
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
                 (INFORMATION FOR THE NINE MONTH PERIODS ENDED
                   SEPTEMBER 30, 1996 AND 1995 IS UNAUDITED)
 
the Company's common stock may be granted to non-employee directors. In
connection with the merger discussed in Note 2, the Company assumed
preexisting Plains stock option plans and converted all options then
outstanding into options to acquire shares of the Company's common stock. No
further options will be granted under the Plains' plans.
 
  Summary of options granted, exercised and outstanding during 1994 and 1995
is as follows:
 
<TABLE>
<CAPTION>
                                               NUMBER       OPTION      OPTION
                                              OF SHARES      PRICE      VALUE
                                              ---------  ------------- --------
                                                                       ($000'S)
   <S>                                        <C>        <C>           <C>
   Outstanding at December 31, 1993.........    336,500  $ 3.88-$13.38 $ 1,949
   Plains outstanding options...............    592,611  $15.91-$27.50  13,962
                                              ---------  ------------- -------
   Outstanding at December 31, 1993, restat-
    ed......................................    929,111  $ 3.88-$27.50  15,911
   Granted..................................    585,500  $10.38-$20.88   8,560
   Exercised or canceled....................   (154,820) $ 3.88-$12.13    (712)
                                              ---------  ------------- -------
   Outstanding at December 31, 1994.........  1,359,791  $ 3.88-$27.50  23,759
   Granted..................................    110,000  $13.38-$22.75   2,454
   Exercised or canceled....................   (477,460) $ 3.88-$27.50  (9,443)
                                              ---------  ------------- -------
   Outstanding at December 31, 1995.........    992,331  $ 5.00-$26.94 $16,770
                                              =========  ============= =======
   Exercisable at December 31, 1995.........    354,883  $ 5.13-$26.94 $ 6,349
                                              =========  ============= =======
</TABLE>
 
8. RETIREMENT BENEFITS
 
  The Company has a voluntary 401(k) employee savings plan. Under this plan,
the Company matches 50% of each of the participating employees' contributions,
up to a maximum of 6% of base salary. Effective April 1, 1996, the Company's
match was increased to 100% of each of the participating employees
contributions, up to a maximum of 6% of base salary, with one-half of the
match paid in cash and one half of the match paid in the Company's common
stock. The Company's matching contributions are subject to a vesting schedule.
Company contributions were $239,000, $179,000 and $166,000 in 1995, 1994 and
1993, respectively.
 
  Plains had several employee benefit plans described below. Pursuant to the
terms of the merger agreement between Plains and the Company, these plans were
terminated.
 
  Plains' qualified, defined benefit retirement plan covered substantially all
of its employees. The benefits were based on a specified level of the
employee's compensation during plan participation. As of July 18, 1995, the
plan froze benefit accruals. Pursuant to the plan, all participants became
fully vested. Plan assets consist of cash and equivalents, corporate stocks
and bonds, U.S. treasury notes, insured annuity contracts, and accrued
interest. Contributions totaled $169,000, $312,000 and $341,000 for the 1995,
1994 and 1993 plan years, respectively.
 
                                     F-13
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
                 (INFORMATION FOR THE NINE MONTH PERIODS ENDED
                   SEPTEMBER 30, 1996 AND 1995 IS UNAUDITED)
 
 
  The following table sets forth the plan's funded status:
 
<TABLE>
<CAPTION>
                                                       1993     1994     1995
                                                      -------  -------  -------
                                                          (IN THOUSANDS)
   <S>                                                <C>      <C>      <C>
   Actuarial present value of benefit obligations:
     Accumulated benefit obligation, including
      vested benefits of $1,290,000, $1,637,000 and
      $2,961,000 respectively.......................  $(1,383) $(1,666) $(2,961)
                                                      =======  =======  =======
     Projected benefit obligation...................  $(2,321) $(2,396) $(2,961)
     Plan assets at fair value......................    1,977    2,205    2,709
                                                      -------  -------  -------
     Projected benefit obligation in excess of plan
      assets........................................     (344)    (191)    (252)
     Unrecognized net (gain) loss...................       16     (141)     --
     Prior service cost not yet recognized in net
      periodic pension costs........................       64       93      --
     Unrecognized net obligation being recognized
      over 9.5 and 10.5 years in 1994 and 1993,
      respectively..................................      146      132      --
                                                      -------  -------  -------
     Accrued pension cost...........................  $  (118) $  (107) $  (252)
                                                      =======  =======  =======
   Net pension cost included the following compo-
    nents:
     Service cost--benefits earned..................  $   346  $   290  $   140
     Interest cost on projected benefit obligation..      150      157      160
     Actual loss (return) on plan assets............     (145)      70     (369)
     Net amortization of unrecognized obligation and
      deferral......................................       28     (216)     347
     Curtailment gain...............................      --       --      (735)
                                                      -------  -------  -------
   Net periodic pension cost (benefit)..............  $   379  $   301  $  (457)
                                                      =======  =======  =======
</TABLE>
 
  The weighted average discount rate used in determining the actuarial present
value of the projected benefit obligation was 4.5% (termination rates). The
rate of increase used for compensation levels was nil in 1995 and 5% in 1994
and 1993, respectively. The expected long-term rate of return on assets was
8.5%.
 
  Plains also contributed the lesser of 10% of its net earnings or 10% of
employee compensation to a profit sharing plan of Plains. No contributions
were made for 1995. Plains contributed $334,000 and $188,000 for 1994 and
1993, respectively.
 
  Through June 30, 1995 and during 1994, Plains matched 401(k) plan deferrals
with contributions equal to 50% of each deferral up to 6% of current salary.
This matching contribution was invested in Plains stock and were subject to a
vesting schedule. Participants became fully vested with the merger with and
into Barrett. Contributions were approximately $112,000, $192,000 and $250,000
for 1995, 1994 and 1993, respectively.
 
  The above described profit-sharing and 401(k) plans were terminated July 1,
1995; the pension plans were terminated September 18, 1995. Internal Revenue
Service approval for termination of these plans was received in January 1996.
Final distribution of plan assets was made to participants in the second
quarter of 1996.
 
  Plains' executive deferred compensation plan and directors' deferred plan
permitted the deferral of current salary or directors' fees for the purpose of
providing funds at retirement or death for
 
                                     F-14
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
                 (INFORMATION FOR THE NINE MONTH PERIODS ENDED
                   SEPTEMBER 30, 1996 AND 1995 IS UNAUDITED)
 
employees, directors and their beneficiaries. These plans were terminated
effective June 30, 1995 and will be disbursed to the participants by the
trustee of the assets over a period ending January 1, 1997. Total accrued
liability under these plans at December 31, 1995 and 1994 was $36,000 and
$1,006,000, respectively.
 
  Concurrently with the effective date of the merger, Plains' postretirement
healthcare benefit and salary continuation plans were terminated. Participants
in the salary continuation plan received (1) a lump sum benefit equal to the
present value of the remaining monthly payments if receiving Death Benefits
under the plan at the date of the termination, or (2) insurance polices, the
cost of which was limited to the cash values of the life insurance policies
owned by Plains. Benefits associated with the postretirement healthcare
benefit plan were terminated and, accordingly, accrued postretirement benefit
costs were relieved.
 
  Effective January 1, 1993, Plains adopted Statement No. 106 (FAS 106) issued
by the Financial Accounting Standards Board on accounting for postretirement
benefits other than pensions. In accordance with this statement, Plains
elected to recognize the accumulated postretirement benefit liability as of
the effective date, totaling approximately $800,000 (pretax). With the
termination of these plans in 1995, all future obligations were settled and
ceased to exist.
 
  Obligations for previous periods were as follows:
 
<TABLE>
<CAPTION>
                                                               DECEMBER 31, 1994
                                                               -----------------
                                                                (IN THOUSANDS)
   <S>                                                         <C>
   Accumulated postretirement benefit obligation:
     Active plan participants................................        $(458)
     Retirees................................................         (302)
                                                                     -----
                                                                      (760)
     Plan assets.............................................            0
                                                                     -----
     Net accumulated postretirement benefit obligation.......         (760)
     Unrecognized net gain from past experience different
      from that assumed and from changes in assumptions......         (167)
                                                                     -----
     Accrued postretirement benefit cost.....................        $(927)
                                                                     =====
   Net periodic postretirement benefit cost included the fol-
    lowing components:
     Service cost of benefits earned.........................        $  41
     Interest cost on accumulated post-retirement benefit ob-
      ligation...............................................           61
                                                                     -----
     Net periodic postretirement benefit cost................        $ 102
                                                                     =====
</TABLE>
 
9. HEDGING ACTIVITIES
 
  The Company uses various hedging techniques to reduce the effect of price
volatility on the sales price of a portion of its oil and gas sales. The
objective of its hedging activities is to achieve more predictable revenues
and cash flows. The following is a summary of the Company's hedging
transactions in effect as of December 31, 1995.
 
                                     F-15
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
                 (INFORMATION FOR THE NINE MONTH PERIODS ENDED
                   SEPTEMBER 30, 1996 AND 1995 IS UNAUDITED)
 
 
  A. The Company is the fixed price payor for hedging transactions relating to
6,000 MMBtu of gas per day for 1996 at $1.33 per MMBtu and approximately 7,000
MMBtu of gas per day for January through May 1996 at an average price of $2.12
per MMBtu. Under these price swap arrangements, the Company has agreed to buy
gas at a fixed price and sell gas at an index price. These price swaps were
entered to accommodate markets desiring fixed price supplies.
 
  B. The Company will receive fixed prices ranging from $1.46 to $2.12 per
MMBtu in swap transactions associated with an average of 52,000 MMBtu of gas
per day to be produced by the Company subsequent to December 31, 1995 through
March 1996. The Company is required to pay an index price to its financial
counterparty. The Company sold a call option on 20,000 MMBtu per day for April
through October 1996. Under this option, the Company will receive $1.86 per
MMBtu should the option holder elect to exercise.
 
  C. The Company's gas hedges also include a collar in which the Company sold
a call and purchased a put with respect to 10,000 MMBtu per day in 1996 with
an average floor (put) price of $1.60 per MMBtu and an average ceiling (call)
price of $1.92 per MMBtu. Under this arrangement, the Company receives a
payment if the index price falls below the floor and makes a payment to the
counterparty if the index price exceeds the ceiling. To reduce exposure to
increasing index prices, the Company purchased call options with prices
averaging $2.673 per MMBtu January--March and $1.969 per MMBtu April--
December, 1996.
 
  D. The Company has entered into basis swaps to minimize different index
price fluctuations. The Company will receive a payment in the event that the
New York Mercantile Exchange ("NYMEX") price per MMBtu for a reference period
exceeds the average specified index price by more than an average of $.29 on
10,000 MMBtu of gas per day from January through March 1996 ($.44 on 5,000
MMBtu of gas per day for April 1996). In separate basis swaps, the Company
will receive a payment in the event the specified index price exceeds the
NYMEX price net of a basis adjustment of an average of $.48 on 10,000 MMBtu of
gas per day from January through October 1996. Conversely, the Company will be
required to make payments to the counterparty if the opposite situation exists
in these swaps. These swaps were entered to offset a portion of the risk
associated with the Company's long-term firm transportation portfolio.
 
  E. With respect to crude oil production, the Company entered into a price
swap whereby the Company will receive a fixed price of $18.00 per Bbl for
1,000 Bbls per day through March 1996. The Company is required to pay the
counterparty a NYMEX settlement price.
 
  As of December 31, 1995, some of the Company's hedging positions described
above did not qualify for hedge accounting due to reduced correlation between
the index price and the prices to be realized for certain physical gas
deliveries. Accordingly, the Company recognized hedging losses of $1.2 million
in the fourth quarter of 1995. These losses offset hedging gains of $1.6
million realized in 1995. The net hedging gain was included in oil and gas
revenues. The Company paid and received certain premiums related to its option
contracts for future periods. The unrealized hedging losses and net deferred
premium costs have been included in other liabilities.
 
  During the first nine months of 1996, the Company recognized net production
hedging expense of $1.5 million which was recorded in the consolidated
statements of income as adjustments of gas and
 
                                     F-16
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
                 (INFORMATION FOR THE NINE MONTH PERIODS ENDED
                   SEPTEMBER 30, 1996 AND 1995 IS UNAUDITED)
 
oil production revenue. As of September 30, 1996, the Company held positions
to hedge production of approximately 11.5 Bcf of gas through October 1997.
 
  During 1995, the Company incurred a net cost of $2.1 million to hedge the
index based price for a portion of its gas purchased in various transactions
for gas trading activities. These payments allowed the Company to purchase gas
on a fixed price basis to satisfy fixed price sales commitments. This hedging
allowed the Company to avoid gas price fluctuations for the related
transactions so that the Company realized the gross profit margins anticipated
upon entering into the trading arrangements. This hedging cost is included in
the income statement as a component of "Cost of Trading."
 
10. COMMITMENTS AND CONTINGENCIES
 
 Lease Commitments
 
  The minimum future payments under the terms of operating leases, principally
for office space, are as follows:
 
<TABLE>
<CAPTION>
                                                                  (IN THOUSANDS)
     <S>                                                          <C>
     Year ended December 31, 1996................................     $1,012
     1997........................................................        988
     1998........................................................      1,001
     1999........................................................        887
     2000........................................................        610
     2001........................................................        205
                                                                      ------
                                                                      $4,703
                                                                      ======
</TABLE>
 
  The Company plans to sublet office space vacated with the consolidation and
relocation of its Denver offices and accordingly anticipates a substantial
reduction in rental expense for the years 1996 through 1999. Rent expense was
$956,000, $859,000 and $788,000 for the years ended December 31, 1995, 1994
and 1993, respectively.
 
 Litigation
 
  On November 2, 1994, a putative class action was filed in Delaware Chancery
Court. In that case, entitled Miller v. Cody, the plaintiff has alleged that
certain named former directors of Plains, and Plains, have, among other
things, breached their fiduciary duties and otherwise acting to entrench
themselves in office. Plaintiff seeks various forms of injunctive relief,
damages and an award of plaintiff's costs and disbursements.
 
  On May 3, 1995, the same day Plains announced it had executed a merger
agreement with the Company, a putative class action, entitled Crandon Capital
Partners v Miller, was filed in Delaware Chancery Court against Plains and the
then-current members of its Board of Directors. In this suit it is alleged
that, among other things, the agreement was inadequate, plaintiff seeks
various forms of declaratory and injunctive relief, damages and an award of
plaintiff's costs and disbursements.
 
  In March 1996, these two putative class actions were dismissed without
prejudice. No defendant paid any consideration for such dismissals.
 
 
                                     F-17
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
                 (INFORMATION FOR THE NINE MONTH PERIODS ENDED
                   SEPTEMBER 30, 1996 AND 1995 IS UNAUDITED)
 
  At December 31, 1995, the Company was a party to certain other legal
proceedings which have arisen out of the ordinary course of business. Based on
the facts currently available, in management's opinion the liability,
individually or in the aggregate, if any, to the Company resulting from such
actions will not have a material adverse effect on the Company's consolidated
financial position or results of operations.
 
 Environmental Controls
 
  At year end 1995, there were no known environmental or other regulatory
matters related to the Company's operations which are reasonably expected to
result in a material liability to the Company. Compliance with environmental
laws and regulations has not had, and is not expected to have, a material
adverse effect on the Company's capital expenditures, earnings or competitive
position.
 
 Major Purchaser
 
  During 1995, one purchaser accounted for 18 percent of the Company's total
revenue (24 percent of oil and gas revenues.) Sales of gas to this purchaser
represented 19 percent and 29 percent of total revenues in 1994 and 1993,
respectively.
 
11. INCOME TAXES
 
  The provision for income taxes consists of the following:
 
<TABLE>
<CAPTION>
                                                            1993   1994   1995
                                                           ------ ------ ------
                                                              (IN THOUSANDS)
   <S>                                                     <C>    <C>    <C>
   Current:
     Federal.............................................. $  174 $  233 $  269
     State................................................    416    117   (233)
                                                           ------ ------ ------
                                                              590    350     36
   Deferred:
     Federal..............................................  5,138  4,511  2,039
     State................................................    993    277   (241)
                                                           ------ ------ ------
                                                            6,131  4,788  1,798
                                                           ------ ------ ------
                                                           $6,721 $5,138 $1,834
                                                           ====== ====== ======
</TABLE>
 
                                     F-18
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
                 (INFORMATION FOR THE NINE MONTH PERIODS ENDED
                   SEPTEMBER 30, 1996 AND 1995 IS UNAUDITED)
 
 
  The difference between the provision for income taxes and the amounts which
would be determined by applying the statutory federal income tax rate to
income before provision for income taxes is analyzed below:
 
<TABLE>
<CAPTION>
                                                      1993     1994     1995
                                                     -------  -------  ------
                                                         (IN THOUSANDS)
   <S>                                               <C>      <C>      <C>
   Tax by applying the statutory federal income tax
    rate to pretax accounting income (loss)........  $ 7,365  $ 5,753  $ (138)
   Increase (decrease) in tax from:
     Change in valuation allowance.................   (1,477)  (2,148)    396
     State income taxes............................    1,409      394    (474)
     Non-deductible merger costs...................      --       --    2,429
     Other, net....................................     (576)   1,139    (379)
                                                     -------  -------  ------
                                                     $ 6,721  $ 5,138  $1,834
                                                     =======  =======  ======
</TABLE>
 
  Long-term deferred tax assets (liabilities) are comprised of the following
at December 31, 1995 and 1994:
 
<TABLE>
<CAPTION>
                                                              1994      1995
                                                            --------  --------
                                                             (IN THOUSANDS)
   <S>                                                      <C>       <C>
   Deferred tax assets:
     Allowance for losses.................................. $    624  $     81
     Loss carryforwards and other..........................   30,221    26,520
                                                            --------  --------
       Gross deferred tax assets...........................   30,845    26,601
   Deferred tax liabilities:
     Deferred revenue--partnership activities..............   (1,086)     (466)
     Depreciation, depletion and amortization..............  (50,650)  (48,460)
     Capitalized interest on other assets..................      (38)       (6)
                                                            --------  --------
       Gross deferred tax liabilities......................  (51,774)  (48,932)
                                                            --------  --------
         Net deferred tax liability........................  (20,929)  (22,331)
         Valuation allowance...............................     (797)   (1,193)
                                                            --------  --------
                                                            $(21,726) $(23,524)
                                                            ========  ========
</TABLE>
 
  Valuation allowances of $1,193,000 and $797,000 were provided at December
31, 1995 and 1994, respectively, based on carryforward amounts which may not
be utilized before expiration and the possible effect of exploratory drilling
costs.
 
                                     F-19
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
                 (INFORMATION FOR THE NINE MONTH PERIODS ENDED
                   SEPTEMBER 30, 1996 AND 1995 IS UNAUDITED)
 
 
  The Company has the following net operating loss and investment tax credit
carryforwards available:
 
<TABLE>
<CAPTION>
     EXPIRATION                                         NET OPERATING INVESTMENT
       YEAR                                                 LOSS      TAX CREDIT
     ----------                                         ------------- ----------
                                                             (IN THOUSANDS)
     <S>                                                <C>           <C>
     1996..............................................    $ 4,227       $172
     1997..............................................      4,673        246
     1998..............................................      8,090        103
     1999..............................................      6,530        100
     2000..............................................      4,900         25
     2001..............................................      3,274          5
     2002..............................................        108        --
     2004..............................................        197        --
     2005..............................................        685        --
     2006..............................................      1,446        --
     2007..............................................         37        --
     2008..............................................     22,352        --
     2009..............................................      6,123        --
                                                           -------       ----
     Total.............................................    $62,642       $651
                                                           =======       ====
</TABLE>
 
  A substantial portion of the net operating losses were acquired in
conjunction with purchased operations.
 
  The 1990 public offering of common stock by the Company before the Plains
merger resulted in a change in the Company's ownership as defined in Section
382 of the Internal Revenue Code. The effect of this change in ownership
limits the utilization of net operating losses for income tax purposes to
approximately $3,069,000 per year which affects $13,590,000 of the net
operating losses. The 1995 merger with Plains also resulted in a change in the
Company's and Plains' ownership as defined by Section 382 of the Internal
Revenue Code. The change effectively limits the utilization of the remaining
net operating losses for income tax purposes to approximately $14,000,000 for
each company. Portions of the above limitations which are not used each year
may be carried forward to future years.
 
  The Internal Revenue Service ("IRS") has examined the federal tax returns of
Plains Petroleum Company, a subsidiary of Barrett Resources Corporation, for
the pre-merger calendar years 1991, 1992 and 1993. The IRS issued a "Notice of
Deficiency" of $5.3 million together with penalties of $1.1 million, and an
undetermined amount of interest. The IRS notice of deficiency resulted
primarily from the IRS's disallowance of certain net operating loss deductions
claimed during the periods under examination. These net operating losses
originally had been incurred by a company that was acquired by Plains in 1986.
The Company currently has additional unused net operating loss carryforwards
of approximately $30 million related to the same acquisition.
 
  Management disagrees with the IRS position. In management's opinion, the
federal tax returns of Plains reflect the proper federal income tax liability
and the existing net operating loss carryforwards are appropriate as supported
by relevant authority. The Company will vigorously contest these proposed
adjustments and believes it will prevail in its positions. It is anticipated
that the final
 
                                     F-20
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
                 (INFORMATION FOR THE NINE MONTH PERIODS ENDED
                   SEPTEMBER 30, 1996 AND 1995 IS UNAUDITED)
 
determination of this matter will involve a lengthy process. On November 29,
1996 the Company filed a petition with the United States Tax Court to request
the IRS notice of deficiency be redetermined by allowing the net operating
losses deductions as originally reported.
 
  During the nine months ended September 30, 1996 the Company acquired oil and
gas properties in purchase transactions that qualify as tax-free exchanges for
tax purposes. The Company deferred income taxes payable of $10.1 million for
the estimated income tax effect of the difference between the financial and
tax basis of the properties acquired.
 
12. SUPPLEMENTAL CASH FLOW SCHEDULES AND INFORMATION
 
  CASH PAID DURING YEARS:
 
<TABLE>
<CAPTION>
                                                                1994 1995  1996
                                                                ---- ---- ------
                                                                 (IN THOUSANDS)
   <S>                                                          <C>  <C>  <C>
   Income taxes................................................ $426 $338 $   65
   Interest....................................................  792  711  5,129
</TABLE>
 
  SUPPLEMENTAL INFORMATION OF NONCASH INVESTING AND FINANCING ACTIVITIES:
 
<TABLE>
<CAPTION>
                                                           NINE MONTHS ENDED
                                   YEAR ENDED DECEMBER 31,   SEPTEMBER 30,
                                   ----------------------- ------------------
                                    1993    1994    1995     1995     1996
                                   ------- ------- ------- -------- ---------
                                                 (IN THOUSANDS)
   <S>                             <C>     <C>     <C>     <C>      <C>
   Issuance of common stock for
    property and related deferred
    taxes......................... $   --  $   --  $   --  $    --  $  31,603
   Treasury shares purchased in
    option transactions...........     204     313     545      157       527
</TABLE>
 
  In May 1994, Plains completed a contingent provision of the 1990 McAdams,
Roux and Associates, Inc. ("MRA") Agreement and Plan of Merger, as it related
to the right of the MRA shareholders to receive additional shares of Plains'
common stock and cash subject to reserves additions on certain property
interests owned by MRA prior to the merger. Under this Agreement, 31,873
shares of Plains' common stock were issued and a cash payment of $1.5 million
was paid to MRA's shareholders in settlement of this obligation.
 
13. RELATED PARTIES
 
  During the years ended December 31, 1995, 1994 and 1993 Zenith Drilling
Corporation ("Zenith") was billed by the Company as operator, approximately
$1,062,000, $1,853,000 and $2,555,000, respectively, for Zenith's portion of
lease operating expenses and development costs in certain leases operated by
the Company. Also as a result of Zenith's working interest ownership, the
Company distributed oil and gas revenue of approximately $942,000, $936,000
and $1,074,000 to Zenith during 1995, 1994 and 1993, respectively. Zenith owns
its working interests subject to the same terms and arrangements that exist
for all working interest owners in the properties. Zenith owns approximately
three percent of the Company's common stock and its president is a member of
the Company's board of directors.
 
                                     F-21
<PAGE>
 
                         BARRETT RESOURCES CORPORATION
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONCLUDED)
 
                 (INFORMATION FOR THE NINE MONTH PERIODS ENDED
                   SEPTEMBER 30, 1996 AND 1995 IS UNAUDITED)
 
 
  During 1993, the Company and Zenith both sold their respective interests in
the Wattenberg field. The Company and Zenith jointly negotiated the sale but
the purchaser independently determined the individual offer prices and entered
into separate sales agreements with each party.
 
  Grand Valley Corporation owns approximately 10 percent of a pipeline joint
venture for gas gathering of which a subsidiary of the Company owns
approximately 29 percent. A member of the Company's board of directors owns 10
percent of the outstanding stock, and is the president of Grand Valley
Corporation. His three adult children own the remaining 90 percent of the
outstanding stock of Grand Valley Corporation.
 
14. QUARTERLY INFORMATION (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                 THREE MONTHS ENDED
                                       -----------------------------------------
                                        3/31/95   6/30/95   9/30/95   12/31/95
                                       --------- --------- ---------  ----------
                                        (IN THOUSANDS, EXCEPT PER SHARE DATA)
   <S>                                 <C>       <C>       <C>        <C>
   1995
     Net revenues..................... $  33,060 $  31,277 $  27,217  $  35,070
     Gross margin.....................     8,611     8,039     6,476      7,882
     Income (loss) from operations....     4,327     3,997   (11,389)     2,659
     Net income (loss)................     3,014     2,957   (11,848)     3,637
     Net income (loss) per share......       .11       .13      (.47)       .14
<CAPTION>
                                                 THREE MONTHS ENDED
                                       -----------------------------------------
                                        3/31/94   6/30/94   9/30/94   12/31/94
                                       --------- --------- ---------  ----------
                                        (IN THOUSANDS, EXCEPT PER SHARE DATA)
   <S>                                 <C>       <C>       <C>        <C>
   1994
     Net revenues..................... $  25,543 $  24,420 $  24,222  $  33,076
     Gross margin.....................     8,572     7,499     6,027      6,990
     Income from operations...........     5,217     3,869     2,834      4,517
     Net income.......................     3,799     2,610     2,081      2,809
     Net income per share.............       .15       .12       .08        .11
<CAPTION>
                                                 THREE MONTHS ENDED
                                       -----------------------------------------
                                        3/31/93   6/30/93   9/30/93   12/31/93
                                       --------- --------- ---------  ----------
                                        (IN THOUSANDS, EXCEPT PER SHARE DATA)
   <S>                                 <C>       <C>       <C>        <C>
   1993
     Net revenues..................... $  30,258 $  26,157 $  22,836  $  24,831
     Gross margin.....................     8,832     8,759     6,902      7,346
     Income from operations...........     6,163     5,649     4,845      4,386
     Income before cumulative effect
      of change in method of
      accounting for income taxes.....     3,828     3,492     3,934      3,068
     Net income........... ...........     3,172     3,492     3,934      3,068
     Earnings per share:
       From continuing operations.....       .16       .14       .16        .12
       Net income.....................       .13       .14       .16        .12
</TABLE>
 
                                     F-22
<PAGE>
 
                     SUPPLEMENTAL OIL AND GAS INFORMATION
 
  The following is information pertaining to the Company's oil and gas
producing activities for the years ended December 31, 1995, 1994 and 1993.
 
  Costs incurred in oil and gas property acquisition, exploration, and
development activities:
 
<TABLE>
<CAPTION>
                                                     1993     1994     1995
                                                   --------  -------  -------
                                                        (IN THOUSANDS)
<S>                                                <C>       <C>      <C>
Acquisition of evaluated properties............... $  6,119  $35,234  $ 7,429
Acquisition of unevaluated properties.............    1,013    8,446    8,383
Exploration costs.................................   12,593   36,232   23,272
Development costs.................................   21,538   20,190   33,029
Other, principally proceeds from mineral convey-
 ances............................................  (15,680)    (173)    (426)
                                                   --------  -------  -------
  Total additions to oil and gas properties....... $ 25,583  $99,929  $71,687
                                                   ========  =======  =======
</TABLE>
 
  Oil and gas reserve information (unaudited):
 
  The following reserve related information for 1995 is based on estimates
prepared by the Company. The 1995 reserve information for the Company,
exclusive of the reserves owned by its subsidiary, Plains, were reviewed by
Ryder Scott, an independent reservoir engineer. The 1995 reserve information
for Plains was reviewed by Netherland, Sewell & Associates, Inc., an
independent reservoir engineer. The Company's 1994 and 1993 reserves,
exclusive of Plains were prepared by the Company and reviewed by Ryder Scott
as of September 30, of each year. The 1994 and 1993 proved developed reserve
estimates of Plains were prepared by Netherland, Sewell & Associates, Inc.
whereas the proved undeveloped reserve estimates were prepared by Plains.
Reserve estimates are inherently imprecise and are continually subject to
revisions based on production history, results of additional exploration and
development, prices of oil and gas and other factors.
 
<TABLE>
<CAPTION>
                                  1993                  1994                  1995
                          --------------------- --------------------- ---------------------
                          OIL (MBBL) GAS (MMCF) OIL (MBBL) GAS (MMCF) OIL (MBBL) GAS (MMCF)
                          ---------- ---------- ---------- ---------- ---------- ----------
                                                   (IN THOUSANDS)
<S>                       <C>        <C>        <C>        <C>        <C>        <C>
Proved developed and
 undeveloped reserves:
Beginning of year.......    10,553    370,621      6,947    364,791     11,444    458,820
Revisions of previous
 estimates..............    (3,426)    (5,418)       772     (5,640)     1,209     (3,805)
Purchase of minerals in
 place..................       217      6,794      2,533     38,717        831      3,983
Extensions and discover-
 ies....................     1,208     28,482      2,547     94,276      1,232    102,329
Production..............    (1,293)   (31,712)    (1,293)   (33,282)    (1,702)   (47,692)
Sale of minerals in
 place..................      (312)    (3,976)       (62)       (42)       (47)      (104)
                            ------    -------     ------    -------     ------    -------
End of year.............     6,947    364,791     11,444    458,820     12,967    513,531
                            ======    =======     ======    =======     ======    =======
Proved developed re-
 serves:
Beginning of year.......     7,398    350,131      5,548    342,287      7,848    393,051
                            ======    =======     ======    =======     ======    =======
End of year.............     5,548    342,287      7,848    393,051     11,669    419,672
                            ======    =======     ======    =======     ======    =======
</TABLE>
 
                                     F-23
<PAGE>
 
  The following is the standardized measure of discounted future net cash
flows relating to proved oil and gas reserves in which the Company has an
interest.
 
<TABLE>
<CAPTION>
                                                1993       1994        1995
                                              ---------  ---------  ----------
                                                      (IN THOUSANDS)
   <S>                                        <C>        <C>        <C>
   Future cash inflows......................  $ 789,693  $ 931,404  $1,132,711
   Future production costs..................   (266,920)  (310,485)   (355,756)
   Future development costs.................    (22,349)   (41,972)    (46,888)
   Future income tax expenses...............   (135,165)  (152,890)   (207,922)
                                              ---------  ---------  ----------
     Future net cash flows..................    365,259    426,057     522,145
   10% annual discount for estimated timing
    of cash flows...........................   (162,173)  (183,436)   (212,271)
                                              ---------  ---------  ----------
   Standardized measure of discounted future
    net cash flows..........................  $ 203,086  $ 242,621  $  309,874
                                              =========  =========  ==========
</TABLE>
 
  The future income tax expenses have been computed considering the tax basis
of the oil and gas properties, and net operating and other loss carryforwards.
 
  The following are the principal sources of changes in the standardized
measure of discounted future net cash flows:
 
<TABLE>
<CAPTION>
                                                   1993      1994       1995
                                                 --------  ---------  --------
                                                       (IN THOUSANDS)
   <S>                                           <C>       <C>        <C>
   Net change in sales price and production
    costs......................................  $ 12,283  $ (22,409) $ 24,558
   Changes in estimated future development
    costs......................................    11,160     14,492    10,301
   Sales and transfers of oil and gas produced,
    net of production costs....................   (53,594)   (50,571)  (62,294)
   Net change due to extensions and discover-
    ies........................................    20,739     60,613    85,524
   Net change due to purchases and sales of
    minerals in place..........................    (1,210)    32,726     7,424
   Net change due to revisions in quantities...   (18,272)      (588)   (1,393)
   Net change in income taxes..................    (4,711)   (10,202)  (33,172)
   Accretion of discount.......................    26,965     27,589    23,112
   Other, principally revisions in estimates of
    timing of production.......................     5,859    (12,115)   13,193
                                                 --------  ---------  --------
   Net changes.................................      (781)    39,535    67,253
   Balance, beginning of year..................   203,867    203,086   242,621
                                                 --------  ---------  --------
   Balance, end of year........................  $203,086  $ 242,621  $309,874
                                                 ========  =========  ========
</TABLE>
 
                                     F-24
<PAGE>
 
================================================================================

  NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY REPRE-
SENTATIONS OTHER THAN THOSE CONTAINED IN THIS PROSPECTUS, AND, IF GIVEN OR
MADE, SUCH INFORMATION OR REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING
BEEN AUTHORIZED. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO SELL OR THE
SOLICITATION OF AN OFFER TO BUY ANY SECURITIES OTHER THAN THE SECURITIES TO
WHICH IT RELATES OR AN OFFER TO SELL OR THE SOLICITATION OF AN OFFER TO BUY
SUCH SECURITIES IN ANY CIRCUMSTANCES IN WHICH SUCH OFFER OR SOLICITATION IS
UNLAWFUL. NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY SALE MADE HEREUNDER
SHALL, UNDER ANY CIRCUMSTANCES, CREATE ANY IMPLICATION THAT THERE HAS BEEN NO
CHANGE IN THE AFFAIRS OF THE COMPANY SINCE THE DATE HEREOF OR THAT THE INFOR-
MATION CONTAINED HEREIN IS CORRECT AS OF ANY TIME SUBSEQUENT TO ITS DATE.
 
                               ----------------
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                          PAGE
                                                                          ----
<S>                                                                       <C>
Prospectus Summary.......................................................   3
Risk Factors.............................................................   9
Use of Proceeds..........................................................  12
Capitalization...........................................................  13
Management's Discussion and Analysis of Financial Condition and Results
 of Operations...........................................................  14
Disclosure Regarding Forward-Looking Statements..........................  19
Business and Properties..................................................  20
Management...............................................................  37
Beneficial Owners of Securities..........................................  41
Description of Notes.....................................................  43
Underwriting.............................................................  53
Legal Matters............................................................  54
Experts..................................................................  54
Available Information....................................................  54
Incorporation of Certain Documents by Reference..........................  55
Certain Definitions......................................................  55
Index to Consolidated Financial Statements............................... F-1
</TABLE>
 
================================================================================

================================================================================

 
                                 $150,000,000
 
                              BARRETT RESOURCES 
                                 CORPORATION
 
                                % SENIOR NOTES
                                   DUE 2007
 
                               ----------------
 
             [LOGO OF BARRETT RESOURCES CORPORATION APPEARS HERE]
 
                               ----------------
 
                             GOLDMAN, SACHS & CO.
 
                             CHASE SECURITIES INC.
 
                                LEHMAN BROTHERS
 
                             PETRIE PARKMAN & CO.
 

================================================================================
<PAGE>
 
                                    PART II
 
                    INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.
 
  The estimated expenses of the Offering described in this Registration
Statement are as follows:
 
<TABLE>
<S>                                                                    <C>
Registration Fee...................................................... $ 45,455
NASD Filing Fee....................................................... $ 15,500
Printing Expenses..................................................... $100,000
Accounting Fees and Expenses.......................................... $ 25,000
Legal Fees and Expenses............................................... $130,000
Blue Sky Fees and Expenses............................................ $  5,000
Rating Agency Fees.................................................... $ 65,000
Trustee and Registrar Fees............................................ $  8,000
Miscellaneous......................................................... $ 56,045
                                                                       --------
  Total............................................................... $450,000
                                                                       ========
</TABLE>
 
ITEM 15.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.
 
  The Delaware General Corporation Law provides for indemnification by a
corporation of costs incurred by directors, employees, and agents in
connection with an action, suit, or proceeding brought by reason of their
position as a director, employee, or agent. The person being indemnified must
have acted in good faith and in a manner he reasonably believed to be in or
not opposed to the best interests of the corporation.
 
  In addition to the general indemnification section, Delaware law provides
further protection for directors under Section 102(b)(7) of the General
Corporation Law of Delaware. This section was enacted in June 1986 and allows
a Delaware corporation to include in its certificate of incorporation a
provision that eliminates and limits certain personal liability of a director
for monetary damages for certain breaches of the director's fiduciary duty of
care, provided that any such provision does not (in the words of the statute)
do any of the following:
 
    "eliminate or limit the liability of a director (i) for any breach of the
  director's duty of loyalty to the corporation or its stockholders, (ii) for
  acts or omissions not in good faith or which involve intentional misconduct
  or a knowing violation of law, (iii) under section 174 of this Title
  [dealing with willful or negligent violation of the statutory provision
  concerning dividends and stock purchases and redemptions], or (iv) for any
  transaction from which the director derived an improper personal benefit.
  No such provision shall eliminate or limit the liability of a director for
  any act or omission occurring prior to the date when such provision becomes
  effective..........."
 
  The Board of Directors is empowered to make other indemnification as
authorized by the Certificate of Incorporation, Bylaws or corporate resolution
so long as the indemnification is consistent with the Delaware General
Corporation Law. Under the Company's bylaws, the Company is required to
indemnify its directors to the full extent permitted by the Delaware General
Corporation Law, common law and any other statutory provision.
 
  The Company also maintains directors and officers insurance that provides
protection for directors and officers of the Company against personal
liability for wrongful acts, including protection for certain matters for
which the Company may not provide indemnification, such as stockholder
derivative actions.
 
 
                                     II-1
<PAGE>
 
ITEM 16. EXHIBITS
 
<TABLE>     
   <C>     <S>
      *1.1 Form of Underwriting Agreement.
       2.1 Agreement And Plan Of Merger, dated as of May 2, 1995, among Barrett
           Resources Corporation ("Registrant"), Barrett Energy Inc. (formerly
           known as Vanilla Corporation), and Plains Petroleum Company
           ("Plains") is incorporated by reference from Annex I to the Joint
           Proxy Statement/Prospectus of Registrant and Plains dated June 13,
           1995.
       4.1 Revised form of Indenture between the Company and Bankers Trust
           Company, as trustee, with respect to Senior Notes.
      *5.1 Opinion regarding legality.
      10.1 First Amendment to Revolving Credit Agreement dated October 31, 1996
           between and among Registrant, Texas Commerce Bank National
           Association, as agent ("Agent"), Texas Commerce Bank National
           Association, NationsBank of Texas, N.A., Bank of Montreal, Houston
           Agency, The First National Bank of Boston, Colorado National Bank,
           and The First National Bank of Chicago (collectively, the "Banks").
      10.2 Second Amendment to Revolving Credit Agreement dated February 10,
           1997 between and among Registrant, Agent, and the Banks.
     *12.1 Computation of Ratio of Earnings to Fixed Charges.
      23.1 Consent of Arthur Andersen LLP.
     *23.2 Consent of Vinson & Elkins L.L.P. (included in Exhibit 5.1).
      23.3 Consent of Ryder Scott Company.
      23.4 Consent of Independent Petroleum Engineers and Geologists
           (Netherland, Sewell & Associates, Inc.).
     *24.1 Power of attorney (included on signature page).
     *25.1 Statement of Eligibility and Qualification under the Trust Indenture
           Act of 1939 on Form T-1 of Bankers Trust Company.
      99.1 Report of Ryder Scott Company (incorporated by reference from
           Exhibit 99.1 to the Registrant's Registration Statement on Form S-3
           filed May 17, 1996, File No. 333-04051).
      99.2 Report of Netherland, Sewell & Associates, Inc. (incorporated by
           reference from Exhibit 99.2 to the Registrant's Registration
           Statement on Form S-3 filed May 17, 1996, File No. 333-04051).
      99.3 Report of Ryder Scott Company dated February 6, 1997.
</TABLE>    
- --------
  * Previously filed.
 
ITEM 17. UNDERTAKINGS.
 
  The undersigned Registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act of 1933, each filing of the
Registrant's Annual Report pursuant to section 13(a) or section 15(d) of the
Securities Exchange Act of 1934 (and, where applicable, each filing of an
employee benefit plan's annual report pursuant to Section 15(d) of the
Securities Exchange Act of 1934) that is incorporated by reference in this
Registration Statement shall be deemed to be a new Registration Statement
relating to the securities offered herein, and the offering of such securities
at that time shall be deemed to be the initial bona fide offering hereof.
 
  The undersigned Registrant hereby undertakes that:
 
    (1) For purposes of determining any liability under the Securities Act of
  1933, the information omitted from the form of prospectus filed as part of
  this Registration Statement in reliance upon
 
                                     II-2
<PAGE>
 
  Rule 430A and contained in a form of prospectus filed by the Registrant
  pursuant to Rule 424(b)(1) or (4) or 497(h) under the Securities Act shall
  be deemed to be part of this Registration Statement as of the time it was
  declared effective.
 
    (2) For the purpose of determining any liability under the Securities Act
  of 1933, each post-effective amendment that contains a form of prospectus
  shall be deemed to be a new Registration Statement relating to the
  securities offered therein, and the offering of such securities at that
  time shall be deemed to be the initial bona fide offering thereof.
 
  Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted to directors, officers and controlling persons of the
Registrant pursuant to the foregoing provisions, or otherwise, the Registrant
has been advised that in the opinion of the Securities And Exchange Commission
such indemnification is against public policy as expressed in the Act and is,
therefore, unenforceable. In the event that a claim for indemnification
against such liabilities (other than the payment by the Registrant of expenses
incurred or paid by a director, officer or controlling person of the
Registrant in the successful defense of any action, suit or proceeding) is
asserted by such director, officer or controlling person in connection with
the securities being registered, the Registrant will, unless in the opinion of
its counsel the matter has been settled by controlling precedent, submit to a
court of appropriate jurisdiction the question whether such indemnification by
it is against public policy as expressed in the Act and will be governed by
the final adjudication of such issue.
 
 
                                     II-3
<PAGE>
 
                                  SIGNATURES
   
  PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THE REGISTRANT
CERTIFIES THAT IT HAS REASONABLE GROUNDS TO BELIEVE THAT IT MEETS ALL OF THE
REQUIREMENTS FOR FILING ON FORM S-3 AND HAS DULY CAUSED THIS AMENDMENT NO. 2
TO THE REGISTRATION STATEMENT TO BE SIGNED ON ITS BEHALF BY THE UNDERSIGNED,
THEREUNTO DULY AUTHORIZED, IN THE CITY OF DENVER, STATE OF COLORADO, ON THE
10TH DAY OF FEBRUARY, 1997.     
 
                                          Barrett Resources Corporation
 
                                          By:    /s/ William J. Barrett
                                             ---------------------------------
                                                    WILLIAM J. BARRETT,
                                                  CHIEF EXECUTIVE OFFICER
   
  PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THIS AMENDMENT
NO. 2 TO THE REGISTRATION STATEMENT HAS BEEN SIGNED BY THE FOLLOWING PERSONS
IN THE CAPACITIES AND ON THE DATE INDICATED.     

<TABLE>    
<CAPTION> 
              SIGNATURE                        TITLE                 DATE

<S>                                    <C>                       <C> 
       /s/ William J. Barrett          Chief Executive           February 10, 1997 
- -------------------------------------   Officer, Chairman        
         WILLIAM J. BARRETT             Of The Board, and         
                                        Director (Principal
                                        Executive Officer)
 
          /s/ Paul M. Rady             President, Chief          February 10, 1997 
- -------------------------------------   Operating Officer,       
            PAUL M. RADY                and Director              
 
          /s/ A. Ralph Reed            Executive Vice            February 10, 1997 
- -------------------------------------   President, and           
            A. RALPH REED               Director                  
 
         /s/ John F. Keller            Executive Vice            February 10, 1997 
- -------------------------------------   President, Chief         
           JOHN F. KELLER               Financial Officer,        
                                        Secretary, and
                                        Director (Principal
                                        Financial and
                                        Accounting Officer)
 
         /s/ John F. Keller*           Director                  February 10, 1997 
- -------------------------------------                            
          C. ROBERT BUFORD                                        
</TABLE>      
 
                                     II-4
<PAGE>

<TABLE>     
<CAPTION> 
 
              SIGNATURE                       TITLE                DATE

<S>                                     <C>                      <C> 
         /s/ John F. Keller*            Director                 February 10, 1997 
- -------------------------------------                            
            DERRILL CODY                                          
 
         /s/ John F. Keller*            Director                 February 10, 1997
- -------------------------------------                            
        JAMES M. FITZGIBBONS                                      
 
                                        Director                 February  , 1997
- -------------------------------------                            
        HENNIE L.J.M. GIESKES                                     
 
         /s/ John F. Keller*            Director                 February 10, 1997
- -------------------------------------                            
        WILLIAM W. GRANT, III                                     
 
         /s/ John F. Keller*            Director                 February 10, 1997
- -------------------------------------                            
          JAMES T. RODGERS                                        
 
         /s/ John F. Keller*            Director                 February 10, 1997 
- -------------------------------------                            
       PHILIPPE S.E. SCHREIBER                                    
 
         /s/ John F. Keller*            Director                 February 10, 1997
- -------------------------------------                            
           HARRY S. WELCH                                         

</TABLE>      
 
- --------
  * AS ATTORNEY-IN-FACT.

                                      II-5
<PAGE>
 
 
                                 EXHIBIT INDEX
                (ATTACHED TO AND MADE A PART OF THE REGISTRATION
                STATEMENT ON FORM S-3 DATED JANUARY 29, 1997 OF
                         BARRETT RESOURCES CORPORATION)
 

 
<TABLE>     
<CAPTION> 

EXHIBIT NO. DESCRIPTION
- ----------- ----------
<C>         <S>
     *1.1   Form of Underwriting Agreement.
      2.1   Agreement And Plan Of Merger, dated as of May 2, 1995, among Barrett
            Resources Corporation ("Registrant"), Barrett Energy Inc. (formerly
            known as Vanilla Corporation), and Plains Petroleum Company
            ("Plains") is incorporated by reference from Annex I to the Joint
            Proxy Statement/Prospectus of Registrant and Plains dated June 13,
            1995.
      4.1   Revised form of Indenture between the Company and Bankers Trust
            Company, as trustee, with respect to Senior Notes.
     *5.1   Opinion regarding legality.
     10.1   First Amendment To Revolving Credit Agreement dated October 31, 1996
            between and among Registrant, Texas Commerce Bank National
            Association, as agent ("Agent"), Texas Commerce Bank National
            Association, NationsBank of Texas, N.A., Bank of Montreal, Houston
            Agency, The First National Bank of Boston, Colorado National Bank,
            and The First National Bank of Chicago (collectively, the "Banks").
     10.2   Second Amendment To Revolving Credit Agreement dated February 10,
            1997 between and among Registrant, Agent, and the Banks.
    *12.1   Computation of Ratio of Earnings to Fixed Charges.
     23.1   Consent of Arthur Andersen LLP.
    *23.2   Consent of Vinson & Elkins L.L.P. (included in Exhibit 5.1).
     23.3   Consent of Ryder Scott Company.
     23.4   Consent of Independent Petroleum Engineers and Geologists
            (Netherland, Sewell & Associates, Inc.)
    *24.1   Power of attorney (included on signature page).
    *25.1   Statement of Eligibility and Qualification under the Trust Indenture
            Act of 1939 on Form T-1 of Bankers Trust Company.
     99.1   Report of Ryder Scott Company (incorporated by reference from
            Exhibit 99.1 to the Registrant's Registration Statement on Form S-3
            filed May 17, 1996, File No. 333-04051).
     99.2   Report of Netherland, Sewell & Associates, Inc. (incorporated by
            reference from Exhibit 99.2 to the Registrant's Registration
            Statement on Form S-3 filed May 17, 1996, File No. 333-04051).
     99.3   Report of Ryder Scott Company dated February 6, 1997.
</TABLE>    
- --------
  * Previously filed.

<PAGE>
 
                                                                     Exhibit 4.1
================================================================================


                         BARRETT RESOURCES CORPORATION

                                         as Issuer,

                                      AND

                             BANKERS TRUST COMPANY

                                         as Trustee
  

                          ____________________________


                                   INDENTURE
                             
                         DATED AS OF FEBRUARY___, 1997     


                          ____________________________


                                 US$150,000,000

                          ____% SENIOR NOTES DUE 2007

                          ____________________________


===============================================================================
<PAGE>
 
                             CROSS-REFERENCE TABLE
<TABLE>
<CAPTION>
TIA SECTION                                                INDENTURE SECTION
<S>                                                        <C>
             310(a)(1)............................................    7.10
                (a)(2)............................................    7.10
                (a)(3)............................................    N.A.
                (a)(4)............................................    N.A.
                (b)...............................................    7.08; 7.10
                (c)...............................................    N.A.
             311(a)...............................................    7.11
                (b)...............................................    7.11
                (c)...............................................    N.A.
             312(a)...............................................    2.06; 2.13
                (b)...............................................    10.03
                (c)...............................................    10.03
             313(a)...............................................    7.06
                (b)...............................................    7.06
                (c)...............................................    7.06
                (d)...............................................    7.06
             314(a)...............................................    4.03
                (b)...............................................    N.A.
                (c)(1)............................................    10.04
                (c)(2)............................................    10.04
                (c)(3)............................................    N.A.
                (d)...............................................    N.A.
                (e)...............................................    10.05
                (f)...............................................    N.A.
             315(a)...............................................    7.01(2)
                (b)...............................................    7.05
                (c)...............................................    7.01(1)
                (d)...............................................    7.01(3)
                (e)...............................................    6.11
             316(a)(last sentence)................................    2.09
                (a)(1)(A).........................................    6.05
                (a)(1)(B).........................................    6.04
                (a)(2)............................................    N.A.
                (b)...............................................    6.07
                (c)...............................................    N.A.
             317(a)(1)............................................    6.08
                (a)(2)............................................    6.09
                (b)...............................................    2.04
             318(a)...............................................    10.01

</TABLE>
_________________________
N.A. means Not Applicable
NOTE: This Cross-Reference table shall not, for any purpose, be deemed part of
this Indenture.
<PAGE>
 
                               TABLE OF CONTENTS
<TABLE>
<CAPTION>
                                                                           PAGE
<S>                     <C>                                                <C>
                                  ARTICLE I
     Section  1.01      Definitions.........................................  1
     Section  1.02      Other Definitions...................................  8
     Section  1.03      Incorporation by Reference of Trust Indenture Act...  9
     Section  1.04      Rules of Construction...............................  9

                                  ARTICLE II

                                THE SECURITIES

     Section  2.01      Forms of Securities Generally.......................  9
     Section  2.02      Title and Terms..................................... 10
     Section  2.03      Denominations....................................... 11
     Section  2.04      Execution, Authentication, Delivery and Dating...... 11
     Section  2.05      Temporary Securities................................ 12
     Section  2.06      Registration, Registration of Transfer and Exchange. 12
     Section  2.07      Book-Entry Provisions for Global Certificates....... 14
     Section  2.08      Mutilated, Destroyed, Lost and Stolen Securities.... 15
     Section  2.09      Payment of Interest; Interest Rights Preserved...... 15
     Section  2.10      Paying Agent........................................ 17
     Section  2.11      Paying Agent to Hold Money in Trust................. 17
     Section  2.12      Persons Deemed Owners............................... 17
     Section  2.13      Holder Lists........................................ 17
     Section  2.14      Outstanding Securities.............................. 18
     Section  2.15      Treasury Securities................................. 18
     Section  2.16      Cancellation........................................ 18
     Section  2.17      Computation of Interest............................. 19

                                  ARTICLE III

                                  REDEMPTION

     Section  3.01      Notices to Trustee.................................. 19
     Section  3.02      Selection of Securities to be Redeemed.............. 19
     Section  3.03      Notices to Holders.................................. 19
</TABLE>

                                       i
<PAGE>
<TABLE>
      <S>               <C>................................................ <C>
     Section  3.04      Effect of Notice of Redemption.....................  20
     Section  3.05      Deposit of Redemption Price........................  20
     Section  3.06      Securities Redeemed in Part........................  21
     Section  3.07      Optional Redemption................................  21

                                  ARTICLE IV

                                  COVENANTS

     Section  4.01      Payment of Securities..............................  22
     Section  4.02      Maintenance of Office or Agency....................  22
     Section  4.03      SEC Reports; Financial Statements..................  23
     Section  4.04      Compliance Certificate.............................  23
     Section  4.05      Corporate Existence................................  24
     Section  4.06      Maintenance of Properties..........................  24
     Section  4.07      Payment of Taxes and Other Claims..................  25
     Section  4.08      Limitation on Sale/Leaseback Transactions..........  25
     Section  4.09      Limitation on Liens................................  26

                                  ARTICLE V

                                  SUCCESSORS

     Section  5.01      Limitations on Mergers and Consolidations..........  28
     Section  5.02      Successor Corporation Substituted..................  28

                                  ARTICLE VI

                             DEFAULTS AND REMEDIES

     Section  6.01      Events of Default..................................  29
     Section  6.02      Acceleration.......................................  30
     Section  6.03      Other Remedies.....................................  31
     Section  6.04      Waiver of Past Defaults............................  31
     Section  6.05      Control by Majority................................  31
     Section  6.06      Limitations on Suits...............................  31
     Section  6.07      Rights of Holders to Receive Payment...............  32
     Section  6.08      Collection Suit by Trustee.........................  32
     Section  6.09      Trustee May File Proofs of Claim...................  32
     Section  6.10      Priorities.........................................  33
     Section  6.11      Undertaking for Costs..............................  33
</TABLE>
                                       ii
<PAGE>
<TABLE>
<S>                      <C>                                                 <C> 
                                  ARTICLE VII

                                   TRUSTEE

     Section  7.01       Duties of Trustee................................... 34
     Section  7.02       Rights of Trustee................................... 35
     Section  7.03       Individual Rights of Trustee........................ 36
     Section  7.04       Trustee's Disclaimer................................ 36
     Section  7.05       Notice of Defaults.................................. 36
     Section  7.06       Reports by Trustee to Holders....................... 36
     Section  7.07       Compensation and Indemnity.......................... 36
     Section  7.08       Replacement of Trustee.............................. 37
     Section  7.09       Successor Trustee by Merger, etc.................... 38
     Section  7.10       Eligibility; Disqualification....................... 38
     Section  7.11       Preferential Collection of Claims Against Company... 39

                                  ARTICLE VIII

                            DISCHARGE OF INDENTURE

     Section  8.01       Termination of Company's Obligations................ 39
     Section  8.02       Application of Trust Money.......................... 41
     Section  8.03       Repayment to Company................................ 41
     Section  8.04       Reinstatement....................................... 42

                                  ARTICLE IX

                                  AMENDMENTS

     Section  9.01       Without Consent of Holders.......................... 42
     Section  9.02       With Consent of Holders............................. 43
     Section  9.03       Compliance with Trust Indenture Act................. 44
     Section  9.04       Revocation and Effect of Consents................... 44
     Section  9.05       Notation on or Exchange of Securities............... 45
     Section  9.06       Trustee to Sign Amendments, etc..................... 45

                                  ARTICLE X

                                MISCELLANEOUS
     Section  10.01      Trust Indenture Act Controls........................ 45
     Section  10.02      Notices............................................. 45
     Section  10.03      Communication by Holders with Other Holders......... 46
</TABLE>


                                      iii
<PAGE>
<TABLE>
    <S>                   <C>                                                 <C>
     Section  10.04       Certificate and Opinion as to Conditions Precedent.. 47
     Section  10.05       Statements Required in Certificate or Opinion....... 47
     Section  10.06       Rules by Trustee and Agents......................... 47
     Section  10.07       Legal Holidays...................................... 47
     Section  10.08       No Recourse Against Others.......................... 48
     Section  10.09       Governing Law....................................... 48
     Section  10.10       No Adverse Interpretation of Other Agreements....... 48
     Section  10.11       Successors.......................................... 48
     Section  10.12       Severability........................................ 48
     Section  10.13       Counterpart Originals............................... 48
     Section  10.14       Trustee as Paying Agent and Registrar............... 48
     Section  10.15       Table of Contents, Headings, etc.................... 49
</TABLE>
     Exhibit A:           Form of Security

                                       iv
<PAGE>
     
     INDENTURE dated as of February__, 1997 among Barrett Resources Corporation,
a Delaware corporation (the "Company"), and Bankers Trust Company of New York, a
New York banking corporation, as trustee (the "Trustee").     

     Each party agrees as follows for the benefit of the other parties and for
the equal and ratable benefit of the Holders of the Company's ____% Senior Notes
due 2007 (the "Securities"):

                                   ARTICLE I

                   DEFINITIONS AND INCORPORATION BY REFERENCE

Section  1.01  Definitions.

     "Affiliate" of any specified Person means any Person directly or indirectly
controlling or controlled by, or under direct or indirect common control with,
such specified Person.  For purposes of this definition, control of a Person
shall mean the power to direct the management and policies of such Person,
directly or indirectly, whether through the ownership of voting securities, by
contract or otherwise.  The Trustee may request and may conclusively rely upon
an Officers' Certificate to determine whether any Person is an Affiliate of any
specified Person.

     "Agent" means any Registrar or Paying Agent.

     "Attributable Indebtedness", when used with respect to any Sale/Leaseback
Transaction, means, as at the time of determination, the present value
(discounted at a rate equivalent to the Company's then current weighted average
cost of funds for borrowed money as at the time of determination, compounded on
a semiannual basis) of the total obligations of the lessee for rental payments
during the remaining term of the lease included in such Sale/ Leaseback
Transaction (including any period for which such lease can be extended).

     "Bankruptcy Law" means title 11, U.S. Code or any similar federal or state
law for the relief of debtors.

     "Board of Directors" means the Board of Directors of the Company or any
authorized committee of the Board of Directors of the Company.

     "Business Day" means any day other than a Legal Holiday.

     "Capital Stock" of any Person means and includes any and all shares, rights
to purchase, warrants or options (whether or not currently exercisable),
participation or other equivalents of or interests in (however designated) the
equity (which includes, but is not limited to, common stock, preferred stock and
partnership and joint venture interests) of such Person (excluding any debt
securities that are convertible into, or exchangeable for, such equity).

                                       1
<PAGE>
 
     "Capitalized Lease Obligation" of any Person means any obligation of such
Person to pay rent or other amounts under a lease of property, real or personal,
that is required to be capitalized for financial reporting purposes in
accordance with GAAP; and the amount of such obligation shall be the capitalized
amount thereof determined in accordance with GAAP.

     "Common Equity" of any Person means and includes all Capital Stock of such
Person that is generally entitled to (i) vote in the election of directors of
such Person, or (ii) if such Person is not a corporation, vote or otherwise
participate in the selection of the governing body, partners, managers or others
that will control the management and policies of such Person.

     "Company" means the Person named as the "Company" in the first paragraph of
this instrument until a successor corporation shall have become such pursuant to
the applicable provisions of this Indenture, and thereafter "Company" shall mean
such successor corporation.

     "Company Request" and "Company Order" means, respectively, a written
request or order signed in the name of the Company by its Chairman of the Board,
its President or a Vice President, and by its Treasurer, an Assistant Treasurer,
its Controller, an Assistant Controller, its Secretary or an Assistant
Secretary, and delivered to the Trustee.
    
     "Consolidated Net Tangible Assets" means, for the Company and its
Restricted Subsidiaries on a consolidated basis determined in accordance with
generally accepted accounting principles, the aggregate amounts of assets (less
depreciation and valuation reserves and other reserves and items deductible from
gross book value of specific asset accounts under generally accepted accounting
principles) that would be included on a balance sheet after deducting therefrom
(a) all  liability items except deferred income taxes, commercial paper, short
term bank indebtedness, Funded Indebtedness, other long-term liabilities and
shareholders' equity and (b) all goodwill, trade names, trademarks, patents,
unamortized debt discount and expense and other like intangibles.     

     "Corporate Trust Office of the Trustee" means the address of the Trustee
specified in Section 10.02 or such other address as the Trustee may give notice
thereof to the Company.

     "Currency Hedge Obligations" means, at any time as to any Person, the
obligations of such Person at such time that were incurred in the ordinary
course of business pursuant to any foreign currency exchange agreement, option
or futures contract or other similar agreement or arrangement designed to
protect against or manage such Person's or any of its Subsidiaries' exposure to
fluctuations in foreign currency exchange rates.

     "Default" means any event, act or condition that is, or after notice or the
passage of time or both would be, an Event of Default.

                                       2
<PAGE>
 
     "Depository" means, with respect to the Securities issued in the form of a
global Security, the Person designated as Depository by the Company pursuant to
Section 2.01 until a successor Depository shall have become such pursuant to the
applicable provisions of this Indenture, and thereafter "Depository" shall mean
or include each Person who is then a Depository hereunder.

     "Exchange Act" means the Securities Exchange Act of 1934, as amended, and
any successor statute.

     "Funded Indebtedness" means all Indebtedness (including Indebtedness
incurred under any revolving credit, letter of credit or working capital
facility) that matures by its terms, or that is renewable at the option of any
obligor thereon to a date, more than one year after the date on which such
Indebtedness is originally incurred.

     "GAAP" means generally accepted accounting principles set forth in the
opinions and pronouncements of the Accounting Principles Board of the American
Institute of Certified Public Accountants and statements and pronouncements of
the Financial Accounting Standards Board or in such other statements by such
other entity as may be approved by a significant segment of the accounting
profession of the United States, as in effect on the Issue Date.

     "Hedging Obligations" of any Person means the obligations of such Person
pursuant to any Currency Hedge Obligations, Interest Rate Hedging Agreements or
Oil and Gas Hedging Contracts.

     "Holder" means a Person in whose name a Security is registered.

     "Indebtedness" of any Person at any date means, without duplication, (i)
all indebtedness of such Person for borrowed money (whether or not the recourse
of the lender is to the whole of the assets of such Person or only to a portion
thereof), (ii) all obligations of such Person evidenced by bonds, debentures,
notes or other similar instruments, (iii) all obligations of such Person in
respect of letters of credit or other similar instruments (or reimbursement
obligations with respect thereto), other than standby letters of credit incurred
by such Person in the ordinary course of business, (iv) all obligations of such
Person to pay the deferred and unpaid purchase price of property or services,
except trade payables and accrued expenses incurred in the ordinary course of
business, (v) all Capitalized Lease Obligations of such Person, (vi) all
Indebtedness of others secured by a Lien on any asset of such Person, whether or
not such Indebtedness is assumed by such Person, (vii) all Indebtedness of
others guaranteed by such Person to the extent of such guarantee and (viii) all
Hedging Obligations of such Person.

     "Indenture" means this Indenture as amended from time to time.

     "Independent Investment Banker" means an independent investment banking
institution of national standing appointed by the Company for purposes of
calculating any Make-Whole Premium, provided, that if the Company fails to make
such appointment at least 45 Business Days prior to the Redemption Date for any
Security to be redeemed, or if the institution so appointed is unwilling or

                                       3
<PAGE>
 
unable to make such calculation, such calculation will be made by Goldman, Sachs
& Co. or, if such firm is unwilling or unable to make such calculation, by an
independent investment banking institution of national standing appointed by the
Trustee.

     "Interest Payment Date" shall have the meaning assigned to such term in the
Securities.

     "Interest Rate Hedging Agreements" means, with respect to any Person, the
obligations of such Person under (i) interest rate swap agreements, interest
rate cap agreements and interest rate collar agreements and (ii) other
agreements or arrangements designed to protect such Person or any of its
Subsidiaries against fluctuations in interest rates.

     "Issue Date" means the date on which the Securities are originally issued
under this Indenture.

     "Lien" means, with respect to any asset, any mortgage, lien, pledge,
charge, security interest or encumbrance of any kind in respect of such asset
(including, without limitation, any production payment, advance payment or
similar arrangement with respect to minerals in place), whether or not filed,
recorded or otherwise perfected under applicable law.  For the purposes of this
Indenture, the Company or any Restricted Subsidiary shall be deemed to own
subject to a Lien any asset which it has acquired or holds subject to the
interest of a vendor or lessor under any conditional sale agreement, Capitalized
Lease Obligation (other than any Capitalized Lease Obligation relating to any
building, structure, equipment or other property used or to be used in the
ordinary course of business of the Company and the Restricted Subsidiaries) or
other title retention agreement relating to such asset.

     "Make-Whole Premium" means, with respect to any Security (or portion
thereof) to be redeemed, an amount equal to the excess, if any, of:

          (i)    the sum of the present values, calculated as of the Redemption
          Date, of:

                 (A)    each interest payment that, but for such redemption,
          would have been payable on the Security (or portion thereof) being
          redeemed on each Interest Payment Date occurring after the Redemption
          Date (excluding any accrued interest for the period prior to the
          Redemption Date); and

                 (B)    the principal amount that, but for such redemption,
          would have been payable at the final maturity of the Security (or
          portion thereof) being redeemed;

     over

          (ii)   the principal amount of the Security (or portion thereof)
          being redeemed.

                                       4
<PAGE>
 
The present values of interest and principal payments referred to in clause (i)
above will be determined in accordance with generally accepted principles of
financial analysis.  Such present values will be calculated by discounting the
amount of each payment of interest or principal from the date that each such
payment would have been payable, but for the redemption, to the Redemption Date
at a discount rate equal to the Treasury Yield plus ___ basis points.  The Make-
Whole Premium shall be calculated by an Independent Investment Banker.

     For purposes of determining the Make-Whole Premium, "Treasury Yield" means
a rate of interest per annum equal to the weekly average yield to maturity of
United States Treasury Notes that have a constant maturity that corresponds to
the remaining term to maturity of the Securities, calculated to the nearest 1/12
of a year (the "Remaining Term").  The Treasury Yield will be determined as of
the third business day immediately preceding the applicable Redemption Date.
The weekly average yields of United States Treasury Notes will be determined by
reference to the most recent statistical release published by the Federal
Reserve Bank of New York and designated "H.15(519) Selected Interest Rates" or
any successor release (the "H.15 Statistical Release").  If the H.15 Statistical
Release sets forth a weekly average yield for United States Treasury Notes
having a constant maturity that is the same as the Remaining Term, then the
Treasury Yield will be equal to such weekly average yield.  In all other cases,
the Treasury Yield will be calculated by interpolation, on a straight-line
basis, between the weekly average yields on the United States Treasury Notes
that have a constant maturity closest to and greater than the Remaining Term and
the United States Treasury Notes that have a constant maturity closest to and
less than the Remaining Term (in each case as set forth in the H.15 Statistical
Release).  Any weekly average yields so calculated by interpolation will be
rounded to the nearest 1/100 of 1%, with any figure of 1/200% or above being
rounded upward.  If weekly average yields for United States Treasury Notes are
not available in the H.15 Statistical Release or otherwise, then the Treasury
Yield will be calculated by interpolation of comparable rates selected by the
Independent Investment Banker.

     "Net Proceeds" means, with respect to any Sale/Leaseback Transaction
entered into by the Company or any Restricted Subsidiary, the aggregate net
proceeds received by the Company or such Restricted Subsidiary from such
Sale/Leaseback Transaction after payment of expenses, taxes, commissions and
similar amounts incurred in connection therewith, whether such proceeds are in
cash or in property (valued at the fair market value thereof at the time of
receipt, as determined by the Board of Directors).

     "Officer" means the President, the Treasurer, any Assistant Treasurer,
Controller, Secretary, Assistant Secretary or any Vice President or Assistant
Vice President of a Person.

     "Officers' Certificate" means a certificate signed by two Officers of a
Person, one of whom must be the Person's chief executive officer, chief
financial officer or chief accounting officer.

     "Oil and Gas Hedging Contracts" means any oil and gas purchase or hedging
agreement, and other agreement or arrangement, in each case, that is designed to
provide protection against oil and gas price fluctuations.

                                       5
<PAGE>
 
     "Opinion of Counsel" means a written opinion from legal counsel who is
acceptable to the Trustee.  The counsel may be an employee of or counsel to the
Company or the Trustee.

     "Ordinary Course Lien" means:

     (a)    Liens for taxes, assessments or governmental charges or levies on
the property of the Company or any Restricted Subsidiary if the same shall not
at the time be delinquent or thereafter can be paid without penalty, or are
being contested in good faith by appropriate proceedings and for which adequate
reserves in accordance with GAAP shall have been set aside on the books of the
Company;

     (b)    Liens imposed by law, such as carriers', warehousemen's, landlords'
and mechanics' liens and other similar liens arising in the ordinary course of
business which secure obligations not more than 60 days past due or which are
being contested in good faith by appropriate proceedings and for which adequate
reserves in accordance with GAAP shall have been set aside on the books of the
Company;

     (c)    Liens arising out of pledges or deposits under worker's compensation
laws, unemployment insurance, old age pensions, or other social security or
retirement benefits, or similar legislation;

     (d)    Utility easements, building restrictions and such other encumbrances
or charges against real property as are of a nature generally existing with
respect to properties of a similar character and which do not in any material
way affect the marketability of the same or interfere with the use thereof in
the ordinary course of business of the Company and the Restricted Subsidiaries;

     (e)    Liens arising under operating agreements or similar agreements in
respect of obligations which are not yet due or which are being contested in
good faith by appropriate proceedings;

     (f)    Liens reserved in oil, gas and/or mineral leases, production sharing
contracts and petroleum concession agreements and licenses for bonus or rental
payments and for compliance with the terms of such leases, contracts, agreements
and licenses;

     (g)    Liens pursuant to partnership agreements, oil, gas and/or mineral
leases, production sharing contracts, petroleum concession agreements and
licenses, farm-out agreements, division orders, contracts for the sale,
purchase, exchange, processing or transportation of oil, gas and/or other
hydrocarbons, unitization and pooling declarations and agreements, operating
agreements, development agreements, area of mutual interest agreements, and
other agreements which are customary in the oil, gas and other mineral
exploration, development and production business and in the business of
processing of gas and gas condensate production for the extraction of products
therefrom;

                                       6
<PAGE>
 
     (h)    Liens on personal property (excluding the Capital Stock of any
Restricted Subsidiary) securing Indebtedness of the Company or any Restricted
Subsidiary other than Funded Indebtedness; and

     (i)    Liens imposed by law or order as a result of any proceeding before
any court or regulatory body that is being contested in good faith, and Liens
which secure a judgment or other court-ordered award or settlement as to which
the Company has not exhausted its appellate rights.

     "Pari Passu Indebtedness" means any Indebtedness of the Company, whether
outstanding on the Issue Date or thereafter created, incurred or assumed,
unless, in the case of any particular Indebtedness, the instrument creating or
evidencing the same or pursuant to which the same is outstanding expressly
provides that such Indebtedness shall be subordinated in right of payment to the
Securities.

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

     "Predecessor Security" of any particular Security means every previous
Security evidencing all or a portion of the same debt as that evidenced by such
particular Security; and, for the purposes of this definition, any Security
authenticated and delivered under Section 2.08 in exchange for or in lieu of a
mutilated, destroyed, lost or stolen Security, shall be deemed to evidence the
same debt as the mutilated, destroyed, lost or stolen Security.

     "Redemption Date," when used with respect to any Security to be redeemed,
means the date fixed for such redemption by or pursuant to this Indenture.

     "Redemption Price" shall have the meaning assigned to such term in the
Securities.

     "Regular Record Date" for the interest payable on any Interest Payment Date
on the Securities of any series means the date specified for that purpose as
contemplated by Section 2.02, or, if not so specified, the last day of the
calendar month preceding such Interest Payment Date if such Interest Payment
Date is the first date of a calendar month, whether or not such day shall be a
Business Day.

     "Restricted Subsidiary" means each of the existing Subsidiaries of the
Company and any Subsidiary of the Company that is a successor corporation of any
of the existing Subsidiaries, except for BGP Inc.  The status of any Subsidiary
of the Company as a Restricted Subsidiary shall continue, so long as it is a
Subsidiary of the Company.

     "Sale/Leaseback Transaction" means any arrangement with any Person
providing for the leasing by the Company or any Restricted Subsidiary, for a
period of more than three years, of any 

                                       7
<PAGE>
 
real or tangible personal property, which property has been or is to be sold or
transferred by the Company or such Restricted Subsidiary to such Person in
contemplation of such leasing.

     "SEC" means the Securities and Exchange Commission.

     "Securities" means the Securities described above issued under this
Indenture.

     "Securities Act" means the Securities Act of 1933, as amended, and any
successor statute.

     "Special Record Date" for the payment of any Defaulted Interest on the
Securities of any series means a date fixed by the Trustee pursuant to Section
2.09.

     "Subsidiary" of any Person means any corporation of which at least a
majority of the aggregate voting power of all classes of the Common Equity is
owned by such Person directly or through one or more other Subsidiaries of such
Person, and any entity other than a corporation in which such Person, directly
or indirectly, owns at least a majority of the Common Equity of such entity.

     "TIA" means the Trust Indenture Act of 1939, as amended (15 U.S.C. (S)(S)
77aaa-77bbbb), as in effect on the Issue Date.

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

     "Trust Officer" means any officer or assistant officer of the Trustee
assigned by the Trustee to administer its corporate trust matters.

     "U.S. Government Obligations" means direct obligations of the United States
of America, obligations on which the payment of principal and interest is fully
guaranteed by the United States of America or obligations or guarantees for the
payment of which the full faith and credit of the United States of America is
pledged.
 
Section  1.02 Other Definitions.

<TABLE>
<CAPTION>
                                             DEFINED
                                               IN
TERM                                         SECTION
- ----                                         -------
<S>                                         <C> 
     "Agent Members"......................     2.07
     "Defaulted Interest".................     2.09
     "Custodian"..........................     6.01
     "Event of Default"...................     6.01
</TABLE> 
                                       8
<PAGE>
<TABLE> 
     <S>                                       <C> 
     "Global Certificate".................      2.01
     "Legal Holiday"......................     10.07
     "Paying Agent".......................      2.10
     "Physical Certificates"..............      2.01
     "Security Register"..................      2.06
     "Security Registrar" or "Registrar"..      2.06
     "Stated Maturity"....................      2.02
     "Successor"..........................      5.01
</TABLE>

Section  1.03  Incorporation by Reference of Trust Indenture Act.

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

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

Section  1.04  Rules of Construction.

         Unless the context otherwise requires:

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

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

         (3)  "or" is not exclusive;

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

         (5)  provisions apply to successive events and transactions.

                                  ARTICLE II

                                THE SECURITIES

Section  2.01  Forms of Securities Generally.

         The definitive Securities shall be printed, lithographed or engraved
on steel-engraved borders or may be produced in any other manner, all as
determined by the Officers executing such Securities, as evidenced by their
execution of such Securities.

                                       9
<PAGE>
 
          The Securities (including the Trustee's certificate of authentication)
shall be issued initially in the form of one or more global Securities
substantially in the form set forth on Exhibit A hereof (each being called a
"Global Certificate") deposited with The Depository Trust Company (the
"Depository"), and registered in the name of its nominee (such nominee being
referred to herein as the "Global Certificate Holder"), or will remain in the
custody of the Trustee pursuant to a FAST Balance Certificate Agreement or
similar agreement between the Depository and the Trustee, and shall be duly
executed by the Company and authenticated by the Trustee as hereinafter
provided.  Subject to the limitation set forth in Section 2.02, the principal
amount of the Global Certificates may be increased or decreased from time to
time by adjustments made on the records of the Trustee as custodian for the
Depository, as hereinafter provided.

          The Securities exchanged for beneficial interests in a Global
Certificate as described in Section 2.07 shall be issued in the form of
permanent certificated Securities in registered form in substantially the form
set forth in Exhibit A hereto ("Physical Certificates").

          The Securities, and the Trustee's certificate of authentication shall
be in substantially the form set forth in Exhibit A hereto, with such
appropriate insertions, omissions, substitutions and other variations as are
required or permitted by this Indenture, and may have such letters, CUSIP or
other numbers or other marks of identification and such legends or endorsements
placed thereon as may be required to comply with the rules of any securities
exchange or as may, consistently herewith, be determined by the Officers
executing such Securities as evidenced by their execution of the Securities.
Any portion of the text of any Security may be set forth on the reverse thereof,
with an appropriate reference thereto on the face of the Security.  In addition
to the requirements of Exhibit A, the Securities may also have set forth on the
reverse side thereof a form of assignment.

Section  2.02  Title and Terms.

          The aggregate principal amount of Securities which may be
authenticated and delivered under this Indenture for original issue is limited
to $150,000,000, and the amount of Securities outstanding at any one time may
not exceed $150,000,000 except as provided in Section 2.08 hereof.
    
          The Securities shall be known and designated as the "___% Senior Notes
due 2007" of the Company. Their Stated Maturity shall be February __, 2007, and
they shall bear interest at the rate of _____% per annum from February __, 1997,
or from the most recent Interest Payment Date to which interest has been paid or
duly provided for, payable semiannually on February __ and August __ in each
year, commencing August __, 1997, and at said Stated Maturity, until the
principal thereof is paid or duly provided for.     

          The principal of (and premium, if any, on) and interest on the
Securities shall be payable at the office or agency of the Company maintained
for such purpose in The City of New York, or at such other office or agency of
the Company as may be maintained for such purpose; provided, however, that, at
the option of the Company, interest will be paid on Physical Securities by check

                                       10
<PAGE>
 
mailed to addresses of the Persons entitled thereto as such addresses shall
appear on the Security Register.

          The Securities shall be redeemable as provided in Article 3 hereof.

          The Securities shall be subject to defeasance at the option of the
Company as provided in Article 8 hereof.

Section  2.03  Denominations.

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

Section  2.04  Execution, Authentication, Delivery and Dating.

          The Securities shall be executed on behalf of the Company by its
Chairman of the Board, its President or a Vice President of the Company, under
its corporate seal affixed thereto or reproduced thereon and attested by its
Secretary or an Assistant Secretary of the Company.  The signature of any of
these Officers on the Securities may be manual or facsimile signatures of such
Officer and may be imprinted or otherwise reproduced on the Securities.

          Securities bearing the manual or facsimile signatures of individuals
who were at any time the proper Officers of the Company shall bind the Company,
notwithstanding that such individuals or any of them have ceased to hold such
offices prior to the authentication and delivery of such Securities or did not
hold such offices at the date of such Securities.

          At any time and from time to time after the execution and delivery of
this Indenture, the Company may deliver Securities executed by the Company to
the Trustee for authentication, together with a Company Order for the
authentication and delivery of such Securities, and the Trustee in accordance
with such Company Order shall authenticate and deliver such Securities as
provided in this Indenture.

          Each Security shall be dated the date of its authentication.

          No Security shall be entitled to any benefit under this Indenture or
be valid or obligatory for any purpose unless there appears on such Security a
certificate of authentication substantially in the form provided for in Exhibit
A hereto, duly executed by the Trustee by manual signature of an authorized
signatory, and such certificate upon any Security shall be conclusive evidence,
and the only evidence, that such Security has been duly authenticated and
delivered hereunder and is entitled to the benefits of this Indenture.

          In case the Company, pursuant to and in compliance with Section 5.01
hereof, shall be consolidated or merged with or into any other Person or shall
convey, transfer, lease or otherwise 

                                       11
<PAGE>
 
dispose of its properties or assets substantially as an entirety to any Person,
and the successor Person resulting from such consolidation, or surviving such
merger, or into which the Company shall have been merged, or the Person which
shall have received a conveyance, transfer, lease or other disposition as
aforesaid, shall have executed an indenture supplemental hereto with the Trustee
pursuant to Section 5.01 hereof, any of the Securities authenticated or
delivered prior to such consolidation, merger, conveyance, transfer, lease or
other disposition may, from time to time, at the request of the successor
Person, be exchanged for other Securities executed in the name of the successor
Person with such changes in phraseology and form as may be appropriate, but
otherwise in substance of like tenor as the Securities surrendered for such
exchange and of like principal amount; and the Trustee, upon Company Request of
the successor Person, shall authenticate and deliver Securities as specified in
such request for the purpose of such exchange. If Securities shall at any time
be authenticated and delivered in any new name of a successor Person pursuant to
this Section in exchange or substitution for or upon registration of transfer of
any Securities, such successor Person, at the option of the Holders but without
expense to them, shall provide for the exchange of all Securities at the time
outstanding for Securities authenticated and delivered in such new name.

Section  2.05  Temporary Securities.

          Pending the preparation of definitive Securities, the Company may
execute, and upon Company Order the Trustee shall authenticate and deliver,
temporary Securities which are printed, lithographed, typewritten, mimeographed
or otherwise produced, in any authorized denomination, substantially of the
tenor of the definitive Securities in lieu of which they are issued and with
such appropriate insertions, omissions, substitutions and other variations as
the Officers executing such Securities may determine, as conclusively evidenced
by their execution of such Securities.

          If temporary Securities are issued, the Company will cause definitive
Securities to be prepared without unreasonable delay.  After the preparation of
definitive Securities, the temporary Securities shall be exchangeable for
definitive Securities upon surrender of the temporary Securities at the office
or agency of the Company designated for such purpose pursuant to Section 4.02
hereof, without charge to the Holder.  Upon surrender for cancellation of any
one or more temporary Securities, the Company shall execute and the Trustee
shall authenticate and deliver in exchange therefor a like principal amount of
definitive Securities of authorized denominations.  Until so exchanged, the
temporary Securities shall in all respects be entitled to the same benefits
under this Indenture as definitive Securities.

Section  2.06  Registration, Registration of Transfer and Exchange.

          The Company shall cause to be kept a register (the register maintained
in such office and in any other office or agency designated pursuant to Section
4.02 hereof being herein sometimes referred to as the "Security Register") in
which, subject to such reasonable regulations as it may prescribe, the Company
shall provide for the registration of Securities and of transfers of Securities.
The Security Register shall be in written form or any other form capable of
being converted into 

                                       12
<PAGE>
 
written form within a reasonable time. At all reasonable times and during normal
business hours, the Security Register shall be open to inspection by the
Trustee. The Trustee is hereby initially appointed as security registrar (the
"Security Registrar" or the "Registrar") for the purpose of registering
Securities and transfers of Securities as herein provided.

          Subject to the provisions of this Section and Section 2.07, upon
surrender for registration of transfer of any Security at the office or agency
of the Company designated pursuant to Section 4.02 hereof, the Company shall
execute, and the Trustee shall authenticate and deliver, in the name of the
designated transferee or transferees, one or more new Securities of any
authorized denomination or denominations of a like aggregate principal amount.

          Furthermore, any Holder of the Global Certificate shall, by acceptance
of such Global Certificate, agree that transfers of beneficial interest in such
Global Certificate may be effected only through a book-entry system maintained
by the Holder of such Global Certificate (or its agent), and that ownership of a
beneficial interest in the Security shall be required to be reflected in a book
entry.

          At the option of the Holder, Securities may be exchanged for other
Securities of any authorized denomination and of a like aggregate principal
amount, upon surrender of the Securities to be exchanged at such office or
agency.  Whenever any Securities are so surrendered for exchange, the Company
shall execute, and the Trustee shall authenticate and deliver, the Securities
which the Holder making the exchange is entitled to receive.

          All Securities issued upon any registration of transfer or exchange of
Securities shall be the valid obligations of the Company evidencing the same
debt, and entitled to the same benefits under this Indenture, as the Securities
surrendered upon such registration of transfer or exchange.

          Every Security presented or surrendered for registration of transfer
or for exchange shall (if so required by the Company or the Security Registrar)
be duly endorsed, or be accompanied by a written instrument of transfer, in form
satisfactory to the Company and the Security Registrar, duly executed by the
Holder thereof or his attorney duly authorized in writing.

          No service charge shall be made for any registration of transfer or
exchange or redemption of Securities, but the Company may require payment of a
sum sufficient to cover any tax or other governmental charge that may be imposed
in connection with any registration of transfer or exchange of Securities, other
than exchanges pursuant to Section 2.05, 2.07, 3.06 or 9.05 hereof not involving
any transfer.

          Neither the Trustee, the Security Registrar nor the Company shall be
required (i) to issue, register the transfer of or exchange any Security during
a period beginning at the opening of business 15 days before the mailing of a
notice of redemption of Securities selected for redemption under Section 3.02
hereof and ending at the close of business on the day of such mailing of the
relevant notice of redemption, or (ii) to register the transfer of or exchange
any Security so selected for 

                                       13
<PAGE>
 
redemption in whole or in part, except the unredeemed portion of any Security
being redeemed in part.

Section  2.07  Book-Entry Provisions for Global Certificates.

          Each Global Certificate shall be registered in the name of the
Depository for such Global Certificate or the nominee of such Depository and may
be delivered to the Trustee as custodian for such Depository.

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

          Transfers of a Global Certificate shall be limited to transfers of
such Global Certificate in whole, but not in part, to the Depository, its
successors or their respective nominees.  Interests of beneficial owners in a
Global Certificate may be transferred in accordance with the rules and
procedures of the Depository.  Physical Certificates shall be transferred to all
beneficial owners in exchange for their beneficial interests in a Global
Certificate if, and only if, either (1) the Depository notifies the Company that
it is unwilling or unable to continue as Depository for the Global Certificate
and a successor Depository is not appointed by the Company within 90 days of
such notice, (2) an Event of Default has occurred and is continuing and the
Security Registrar has received a request from the Depository to issue Physical
Certificates in lieu of all or a portion of the Global Certificate (in which
case the Company shall deliver Physical Certificates within 30 days of such
request) or (3) the Company determines not to have the Securities represented by
a Global Certificate.

          In connection with any transfer of a portion of the beneficial
interest in a Global Certificate to beneficial owners pursuant to this Section,
the Registrar shall reflect on its books and records the date and a decrease in
the principal amount of the Global Certificate in an amount equal to the
principal amount of the beneficial interest in the Global Certificate to be
transferred, and the Company shall execute, and the Trustee upon receipt of a
Company Order for the authentication and delivery of Physical Certificates shall
authenticate and deliver, one or more Physical Certificates of like tenor and
amount.

          In connection with the transfer of an entire Global Certificate to
beneficial owners pursuant to this Section, the Global Certificate shall be
deemed to be surrendered to the Trustee for cancellation, and the Company shall
execute, and the Trustee shall authenticate and deliver, to each 

                                       14
<PAGE>
 
beneficial owner identified by the Depository in exchange for its beneficial
interest in the Global Certificate, an equal aggregate principal amount of
Physical Certificates of authorized denominations.

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

Section  2.08  Mutilated, Destroyed, Lost and Stolen Securities.

          If (i) any mutilated  Security is surrendered to the Trustee or (ii)
the Company and the Trustee receive evidence to their satisfaction of the
destruction, loss or theft of any Security, and there is delivered to the
Company and the Trustee such security or indemnity as may be required by them to
save each of them harmless, then, in the absence of notice to the Company or the
Trustee that such Security has been acquired by a bona fide purchaser, the
Company shall execute, and upon Company Order the Trustee shall authenticate and
deliver, in exchange for any such mutilated Security or in lieu of any such
destroyed, lost or stolen Security, a new Security of like tenor and principal
amount, bearing a number not contemporaneously outstanding.

          In case any such mutilated, destroyed, lost or stolen Security has
become or is about to become due and payable, the Company in its discretion may,
instead of issuing a new Security, pay such Security.

          Upon the issuance of any new Security under this Section, the Company
may require the payment of a sum sufficient to cover any tax or other
governmental charge that may be imposed in relation thereto and any other
expenses (including the fees and expenses of the Trustee) connected therewith.

          Every new Security issued pursuant to this Section in lieu of any
mutilated, destroyed, lost or stolen Security shall constitute an original
additional contractual obligation of the Company,  whether or not the mutilated,
destroyed, lost or stolen Security shall be at any time enforceable by anyone,
and shall be entitled to all benefits of this Indenture equally and
proportionately with any and all other Securities duly issued hereunder.

          The provisions of this Section are exclusive and shall preclude (to
the extent lawful) all other rights and remedies with respect to the replacement
or payment of mutilated, destroyed, lost or stolen Securities.

Section  2.09  Payment of Interest; Interest Rights Preserved.

          Interest on any Security which is payable, and is punctually paid or
duly provided for, on any Interest Payment Date shall be paid to the Person in
whose name such Security (or one or more Predecessor Securities) is registered
at the close of business on the Regular Record Date for such 

                                       15
<PAGE>
 
interest at the office or agency of the Company maintained for such purpose
pursuant to Section 4.02 hereof.

          Any interest on any Security which is payable, but is not punctually
paid or duly provided for, on any Interest Payment Date shall forthwith cease to
be payable to the Holder on the Regular Record Date by virtue of having been
such Holder, and such defaulted interest and (to the extent lawful) interest on
such defaulted interest at the rate borne by the Securities (such defaulted
interest and interest thereon herein collectively called "Defaulted Interest")
may be paid by the Company, at its election in each case, as provided in clause
(a) or (b) below:

          (a)  The Company may elect to make payment of any Defaulted Interest
to the Persons in whose names the Securities (or their respective Predecessor
Securities) are registered at the close of business on a Special Record Date for
the payment of such Defaulted Interest, which shall be fixed in the following
manner. The Company shall notify the Trustee in writing of the amount of
Defaulted Interest proposed to be paid on each Security and the date of the
proposed payment, and at the same time the Company shall deposit with the
Trustee an amount of money equal to the aggregate amount proposed to be paid in
respect of such Defaulted Interest or shall make arrangements satisfactory to
the Trustee for such deposit prior to the date of the proposed payment, such
money when deposited shall be held in trust for the benefit of the Persons
entitled to such Defaulted Interest as in this clause provided. Thereupon the
Trustee shall fix a Special Record Date for the payment of such Defaulted
Interest which shall be not more than 15 days and not less than 10 days prior to
the date of the proposed payment and not less than 10 days after the receipt by
the Trustee of the notice of the proposed payment. The Trustee shall promptly
notify the Company of such Special Record Date, and in the name and at the
expense of the Company, shall cause notice of the proposed payment of such
Defaulted Interest and the Special Record Date therefor to be given in the
manner provided for in Section 10.02 hereof, not less than 10 days prior to such
Special Record Date. Notice of the proposed payment of such Defaulted Interest
and the Special Record Date therefor having been so given, such Defaulted
Interest shall be paid to the Persons in whose names the Securities (or their
respective Predecessor Securities) are registered at the close of business on
such Special Record Date and shall no longer be payable pursuant to the
following clause (b).

          (b)  The Company may make payment of any Defaulted Interest in any
other lawful manner not inconsistent with the requirements of any securities
exchange on which the Securities may be listed, and upon such notice as may be
required by such exchange, if, after notice given by the Company to the Trustee
of the proposed payment pursuant to this clause, such manner of payment shall be
deemed practicable by the Trustee.

          Subject to the foregoing provisions of this Section, each Security
delivered under this Indenture upon registration of transfer of or in exchange
for or in lieu of any other Security shall carry the rights to interest accrued
and unpaid, and to accrue, which were carried by such other Security.

                                       16
<PAGE>
 
Section  2.10  Paying Agent.

          The Company shall also maintain an office or agency where Securities
may be presented for payment ("Paying Agent").  The Company may appoint one or
more additional paying agents.  The term "Paying Agent" includes any additional
paying agent.  The Company may change any Paying Agent without notice to any
Holder.  The Company shall notify the Trustee in writing of the name and address
of any Paying Agent not a party to this Indenture.  If the Company fails to
appoint or maintain another entity as Paying Agent, the Trustee shall act as
such.  The Company or any of its Subsidiaries may act as Paying Agent.

          The Company initially appoints the Trustee to act as the Paying Agent
with respect to the Global Certificates.

Section  2.11  Paying Agent to Hold Money in Trust.

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

Section  2.12  Persons Deemed Owners.

          Prior to the due presentment of a Security for registration of
transfer, the Company, the Security Registrar, the Trustee and any agent of the
Company, or the Trustee may treat the Person in whose name such Security is
registered as the owner of such Security for the purpose of receiving payment of
principal of (and premium, if any, on) and (subject to Section 2.09 hereof)
interest on such Security and for all other purposes whatsoever, whether or not
such Security be overdue, and none of the Company, the Security Registrar, the
Trustee or any agent of the Company, or the Trustee shall be affected by notice
to the contrary.

Section  2.13  Holder Lists.

          The Trustee shall preserve in as current a form as is reasonably
practicable the most recent list available to it of the names and addresses of
all Holders and shall otherwise comply with TIA (S)312(a).  If the Trustee is
not the Registrar, the Company shall furnish to the Trustee at least seven
Business Days before each Interest Payment Date and at such other times as the
Trustee may request 

                                       17
<PAGE>
 
in writing, a list in such form and as of such date as the Trustee may
reasonably require of the names and addresses of the Holders of Securities and
the Company shall otherwise comply with TIA (S)312(a).

Section  2.14  Outstanding Securities.

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

          If a Security is replaced pursuant to Section 2.08 hereof, it ceases
to be outstanding unless the Trustee receives proof satisfactory to it that the
replaced Security is held by a bona fide purchaser.

          If the principal amount of any Security is considered paid under
Section 4.01 hereof, it ceases to be outstanding and interest on it ceases to
accrue.

          If the Paying Agent (other than the Company, a Subsidiary or an
Affiliate of any thereof) holds, on a redemption date or maturity date, money
sufficient to pay Securities payable on that date, then on and after that date
such Securities shall be deemed to be no longer outstanding and shall cease to
accrue interest.

Section  2.15  Treasury Securities.

          In determining whether the Holders of the required principal amount of
Securities have concurred in any direction, waiver or consent, Securities owned
by the Company, a Subsidiary or by any Affiliate of the Company shall be
considered as though not outstanding, except that for the purposes of
determining whether the Trustee shall be protected in relying on any such
direction, waiver or consent, only Securities that the Trustee actually knows
are so owned shall be so disregarded.

Section  2.16  Cancellation.

          All Securities surrendered for payment, redemption, registration of
transfer or exchange shall, if surrendered to any Person other than the Trustee,
be delivered to the Trustee and shall be promptly cancelled by it.  The Company
may at any time deliver to the Trustee for cancellation any Securities
previously authenticated and delivered hereunder which the Company may have
acquired in any manner whatsoever, and all Securities so delivered shall be
promptly cancelled by the Trustee.  No Securities shall be authenticated in lieu
of or in exchange for any Securities cancelled as provided in this Section,
except as expressly permitted by this Indenture.  All cancelled Securities held
by the

                                       18
<PAGE>
 
Trustee shall be destroyed and a certificate of their destruction delivered
to the Company unless by a Company Order the Company shall direct that cancelled
Securities be returned to it.

Section  2.17  Computation of Interest.

          Interest on the Securities shall be computed on the basis of a 360-day
year comprised of twelve 30-day months.

                                  ARTICLE III

                                  REDEMPTION

Section  3.01  Notices to Trustee.

          If the Company elects to redeem Securities pursuant to the redemption
provisions of Section 3.07, it shall furnish to the Trustee, at least 45 days
but not more than 60 days before a Redemption Date, an Officers' Certificate
setting forth the Section of this Indenture pursuant to which the redemption
shall occur, the Redemption Date, the principal amount of Securities to be
redeemed and the Redemption Price.

Section  3.02  Selection of Securities to be Redeemed.

          If less than all of the Securities are to be redeemed, the Trustee
shall select the Securities to be redeemed by such method as the Trustee in its
sole discretion shall deem fair and appropriate.  The particular Securities to
be redeemed shall be selected, unless otherwise provided herein, not less than
30 days nor more than 60 days prior to the Redemption Date by the Trustee from
the outstanding Securities not previously called for redemption.

          The Trustee shall promptly notify the Company in writing of the
Securities selected for redemption and, in the case of any Security selected for
partial redemption, the principal amount thereof to be redeemed.  Securities and
portions of them selected shall be in amounts of $1,000 or whole multiples of
$1,000.  Except as provided in the preceding sentence, provisions of this
Indenture that apply to Securities called for redemption also apply to portions
of Securities called for redemption.

Section  3.03  Notices to Holders.

          (a)  At least 30 days but not more than 60 days before a Redemption
Date, the Company shall mail in conformity with Section 10.02 a notice of
redemption to each Holder whose Securities are to be redeemed.

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

                                       19
<PAGE>
 
          (i)    the Redemption Date;

          (ii)   the Redemption Price;

          (iii)  if any Security is being redeemed in part, the portion of the
principal amount of such Security to be redeemed and that, after the Redemption
Date, upon surrender of such Security, a new Security or Securities in principal
amount equal to the unredeemed portion will be issued;

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

          (v)    that Securities called for redemption must be surrendered to
the Paying Agent at the address specified in such notice to collect the
Redemption Price;

          (vi)   that unless the Company defaults in making the redemption
payment, interest on Securities called for redemption ceases to accrue on and
after the Redemption Date and the only remaining right of the Holders is to
receive payment of the Redemption Price upon surrender to the Paying Agent of
the Securities;

          (vii)  the paragraph of the Securities pursuant to which the
Securities are being redeemed; and

          (viii) the aggregate principal amount of Securities being redeemed.

      (b) At the Company's request, the Trustee shall give the notice
required in Section 3.03(a) in the Company's name; provided, however, that the
Company shall deliver to the Trustee, at least 45 days prior to the Redemption
Date, an Officers' Certificate requesting that the Trustee give such notice and
setting forth the information to be stated in such notice as provided in Section
3.03(a).

Section  3.04  Effect of Notice of Redemption.

          Once notice of redemption is mailed pursuant to Section 3.03,
Securities called for redemption become due and payable on the Redemption Date
at the Redemption Price.  Upon surrender to the Paying Agent, such Securities
shall be paid out at the Redemption Price.

Section  3.05  Deposit of Redemption Price.

          One Business Day prior to the Redemption Date, the Company shall
deposit with the Trustee or with the Paying Agent money sufficient to pay the
Redemption Price of all Securities to be redeemed on that date.  The Trustee or
the Paying Agent shall return to the Company any money not required for that
purpose.

                                       20
<PAGE>
 
          If the Company complies with the preceding paragraph, interest on the
Securities or portions thereof to be redeemed (whether or not such Securities
are presented for payment) will cease to accrue on the applicable Redemption
Date.  If any Security called for redemption shall not be so paid upon surrender
because of the failure of the Company to comply with the preceding paragraph,
then interest will be paid on the unpaid principal and premium, if any, from the
Redemption Date until such principal and premium are paid and, to the extent
lawful, on any interest not paid on such unpaid principal, in each case at the
rate provided in the Securities and in Section 4.01.

Section  3.06  Securities Redeemed in Part.

          Upon surrender of a Security that is redeemed in part, the Company
shall issue and the Trustee shall authenticate for the Holder, at the expense of
the Company, a new Security equal in principal amount to the unredeemed portion
of the Security surrendered.

Section  3.07  Optional Redemption.

          The Securities may be redeemed at any time, at the option of the
Company, in whole or from time to time in part, at the Redemption Price
specified in the Securities.

          Any redemption pursuant to this Section 3.07 shall be made, to the
extent applicable, pursuant to the provisions of Sections 3.01 through 3.06.

                                  ARTICLE IV

                                   COVENANTS

Section  4.01  Payment of Securities.

          The Company shall pay the principal of, and premium, if any, and
interest on the Securities on the dates and in the manner provided in the
Securities.  Principal, premium and interest shall be considered paid on the
date due if the Paying Agent, other than the Company or a Subsidiary of the
Company, holds on that date money deposited by the Company designated for and
sufficient to pay all principal, premium and interest then due.

          The Company shall pay interest (including post-petition interest in
any proceeding under any Bankruptcy Law) on overdue principal, and premium, if
any, at a rate equal to the then applicable interest rate on the Securities to
the extent lawful; and it shall pay interest (including post-petition interest
in any proceeding under any Bankruptcy Law) on overdue installments of interest
(without regard to any applicable grace period) at the same rate to the extent
lawful.

                                       21
<PAGE>
 
Section  4.02  Maintenance of Office or Agency.

          The Company will maintain, in the Borough of Manhattan, The City of
New York, an office or agency (which may be an office of the Trustee, the
Registrar or the Paying Agent) where Securities may be presented for
registration of transfer or exchange and where Securities may be presented for
payment.  Unless otherwise designated by the Company by written notice to the
Trustee, such office or agency shall be the Corporate Trust Office of the
Trustee.  The Company will give prompt written notice to the Trustee of the
location, and any change in the location, of such office or agency.  If at any
time the Company shall fail to maintain any such required office or agency or
shall fail to furnish the Trustee with the address thereof, such presentations
may be made at the Corporate Trust Office of the Trustee.

          The Company may also from time to time designate one or more other
offices or agencies where the Securities may be presented or surrendered for any
or all such purposes and may from time to time rescind such designations;
provided, however, that no such designation or rescission shall in any manner
relieve the Company of its obligation to maintain an office or agency in the
Borough of Manhattan, The City of New York for such purposes.  The Company will
give prompt written notice to the Trustee of any such designation or rescission
and of any change in the location of any such other office or agency.  The
Company hereby designates the Corporate Trust Office of the Trustee as one such
office or agency of the Company in accordance with Section 2.02.

Section  4.03  SEC Reports; Financial Statements.

          (a)  The Company shall file with the Trustee, within 15 days after it
files the same with the SEC, copies of the annual reports and the information,
documents and other reports (or copies of such portions of any of the foregoing
as the SEC may by rules and regulations prescribe) that the Company is required
to file with the SEC pursuant to Section 13 or 15 (d) of the Exchange Act.  If
the Company is not subject to the requirements of such Section 13 or 15(d), the
Company shall file with the Trustee, within 15 days after it would have been
required to file the same with the SEC, financial statements, including any
notes thereto (and with respect to annual reports, an auditors' report by a firm
of established national reputation), and a "Management's Discussion and Analysis
of Financial Condition and Results of Operations," both comparable to that which
the Company would have been required to include in such annual reports,
information, documents or other reports if the Company had been subject to the
requirements of such Section 13 or 15 (d).  The Company shall also comply with
the provisions of TIA (S) 314 (a).

          (b)  If the Company is required to furnish annual or quarterly reports
to its stockholders pursuant to the Exchange Act, the Company shall cause any
annual report furnished to its stockholders generally and any quarterly or other
financial reports furnished by it to its stockholders generally to be filed with
the Trustee and mailed to the Holders at their addresses appearing in the
Security Register.  If the Company is not required to furnish annual or
quarterly reports to its stockholders pursuant to the Exchange Act, the Company
shall cause its financial statements referred to in Section 4.03 (a), including
any notes thereto (and with respect to annual reports, an auditors' 

                                       22
<PAGE>
 
report by a firm of established national reputation), and a "Management's
Discussion and Analysis of Financial Condition and Results of Operations" to be
so mailed to the Holders within 90 days after the end of each of the Company's
fiscal years and within 60 days after the end of each of the Company's first
three fiscal quarters.

          (c)  The Company shall provide the Trustee with a sufficient number of
copies of all reports and other documents and information that the Trustee may
be required to deliver to Holders under this Section.

Section  4.04  Compliance Certificate.

          (a)  The Company shall deliver to the Trustee, within 120 days after
the end of each fiscal year of the Company, an Officers' Certificate stating
that a review of the activities of the Company and its Subsidiaries during the
preceding fiscal year has been made under the supervision of the signing
Officers of the Company with a view to determining whether the Company has kept,
observed, performed and fulfilled its obligations under this Indenture, and
further stating, as to each such Officer signing such certificate, that to the
best of his knowledge the Company has kept, observed, performed and fulfilled
each and every covenant contained in this Indenture and is not in default in the
performance or observance of any of the terms, provisions and conditions hereof,
without regard to any grace period or requirement of notice required by this
Indenture (or, if a Default or Event of Default shall have occurred, describing
all such Defaults or Events of Default of which such Officer may have knowledge
and what action the Company, is taking or proposes to take with respect thereto)
and that to the best of his knowledge no event has occurred and remains in
existence by reason of which payments on account of the principal of, or
premium, if any, or interest, if any, on the Securities are prohibited or, if
such event has occurred, a description of the event and what action the Company
is taking or proposes to take with respect thereto.

          (b)  So long as not contrary to the then current recommendations of
the American Institute of Certified Public Accountants, the year-end financial
statements delivered pursuant to Section 4.03 shall be accompanied by a written
statement of the Company's independent public accountants (who shall be a firm
of established national reputation) that in making the examination necessary for
certification of such financial statements nothing has come to their attention
that would lead them to believe that the Company has violated any provisions of
Articles 4 or 5 of this Indenture (to the extent such provisions relate to
accounting matters) or, if any such violation has occurred, specifying the
nature and period of existence thereof, it being understood that such
accountants shall not be liable directly or indirectly to any Person for any
failure to obtain knowledge of any such violation.

          (c)  The Company shall, so long as any of the Securities are
outstanding, deliver to the Trustee, forthwith upon any Officer of the Company
becoming aware of any Default or Event of Default under this Indenture, an
Officers' Certificate specifying such Default or Event of Default and what
action the Company is taking or proposes to take with respect thereto.

                                       23
<PAGE>
 
Section  4.05  Corporate Existence.

          The Company shall do or cause to be done all things necessary to
preserve and keep in full force and effect its corporate existence and the
corporate, partnership and other existence of each of its Subsidiaries and all
rights (charter and statutory) and franchises of the Company and its
Subsidiaries, provided that the Company shall not be required to preserve the
corporate existence of any Subsidiary of the Company or any such right or
franchise if the Board of Directors shall determine that the preservation
thereof is no longer desirable in the conduct of the business of the Company and
the Restricted Subsidiaries and that the loss thereof would not have a material
adverse effect on the business, prospects, assets or financial condition of the
Company and its Subsidiaries taken as a whole and would not have any material
adverse effect on the payment and performance of the obligations of the Company
under the Securities and this Indenture.

Section  4.06  Maintenance of Properties.

          The Company shall cause all properties owned by the Company or any of
its Subsidiaries or used or held for use in the conduct of its business or the
business of any such Subsidiary to be maintained and kept in good condition,
repair and working order (reasonable wear and tear excepted) and supplied with
all necessary equipment and will cause to be made all necessary repairs,
renewals, replacements, betterments and improvements thereof, all as in the
judgment of the Company may be necessary so that the business carried on in
connection therewith may be properly and advantageously conducted at all times;
provided that nothing in this Section shall prevent the Company from
discontinuing the operation or maintenance of any of such properties if such
discontinuance is, in the judgment of the Company, desirable in the conduct of
its business or the business of any such Subsidiary and not disadvantageous in
any material respect to the Holders.

Section  4.07  Payment of Taxes and Other Claims.

          The Company will pay or discharge or cause to be paid or discharged,
before the same shall become delinquent, (i) all taxes, assessments and
governmental charges levied or imposed upon the Company or any of its
Subsidiaries or upon the income, profits or property of the Company or any of
its Subsidiaries, and (ii) all lawful claims for labor, materials and supplies
which, if unpaid, might by law become a Lien upon the property of the Company or
any of its Subsidiaries; provided that the Company shall not be required to pay
or discharge or cause to be paid or discharged any such tax, assessment, charge
or claim whose amount, applicability or validity is being contested in good
faith by appropriate proceedings.

Section  4.08  Limitation on Sale/Leaseback Transactions.

          The Company shall not, and shall not permit any Restricted Subsidiary
to, enter into any Sale/Leaseback Transaction with any Person (other than the
Company or a Restricted Subsidiary) unless:

                                       24
<PAGE>
 
          (a)  the Company or such Restricted Subsidiary would be entitled to
incur Indebtedness, in a principal amount equal to the Attributable Indebtedness
with respect to such Sale/Leaseback Transaction, secured by a Lien on the
property subject to such Sale/Leaseback Transaction pursuant to Section 4.09
without equally and ratably securing the Securities pursuant to such Section;

          (b)  after the Issue Date and within a period commencing six months
prior to the consummation of such Sale/Leaseback Transaction and ending six
months after the consummation thereof, the Company or such Restricted Subsidiary
shall have expended for property used or to be used in the ordinary course of
business of the Company and the Restricted Subsidiaries (including amounts
expended for the exploration, drilling or development thereof, and for
additions, alterations, repairs and improvements thereto) an amount equal to all
or a portion of the Net Proceeds of such Sale/Leaseback Transaction and the
Company shall have elected to designate such amount as a credit against such
Sale/Leaseback Transaction (with any such amount not being so designated to be
applied as set forth in clause (c) below); or

          (c)  the Company, during the 12-month period after the effective date
of such Sale/Leaseback Transaction, shall have applied to the voluntary
defeasance or retirement of Securities or any Pari Passu Indebtedness an amount
equal to the greater of the Net Proceeds of the sale or transfer of the property
leased in such Sale/Leaseback Transaction and the fair value, as determined by
the Board of Directors, of such property at the time of entering into such
Sale/Leaseback Transaction (in either case adjusted to reflect the remaining
term of the lease and any amount expended by the Company as set forth in clause
(b) above), less an amount equal to the principal amount of Securities and Pari
Passu Indebtedness voluntarily defeased or retired by the Company within such 
12-month period and not designated as a credit against any other Sale/Leaseback
Transaction entered into by the Company or any Restricted Subsidiary during such
period.

Section  4.09  Limitation on Liens.

          No provision of this Indenture or the Securities shall in any way
restrict or prevent the Company or any Restricted Subsidiary from issuing,
assuming, guaranteeing or otherwise incurring any Indebtedness; provided,
however, that the Company shall not, and shall not permit any Restricted
Subsidiary to, issue, assume or guarantee any Indebtedness for borrowed money
secured by any Lien on any property or asset now owned or hereafter acquired by
the Company or such Restricted Subsidiary without making effective provision
whereby any and all Securities then or thereafter outstanding will be secured by
a Lien equally and ratably with any and all other obligations thereby secured
for so long as any such obligations shall be so secured.  Notwithstanding the
foregoing, the Company or any Restricted Subsidiary may, without so securing the
Securities, issue, assume or guarantee Indebtedness secured by the following
Liens:

          (a)  Liens existing on the Issue Date or provided for under the terms
of agreements existing on the Issue Date (including, without limitation, the
Lien provided for pursuant to Section 7.07);

                                       25
<PAGE>
 
        (b)  Liens on property securing (i) all or any portion of the cost of
exploration, drilling or development of such property, (ii) all or any portion
of the cost of acquiring, constructing, altering, improving or repairing any
property or assets, real or personal, or improvements used or to be used in
connection with such property or (iii) Indebtedness incurred by the Company or
any Restricted Subsidiary to provide funds for the activities set forth in
clauses (i) and (ii) above;

        (c)  Liens securing Indebtedness owed by a Restricted Subsidiary to the
Company or to any other Restricted Subsidiary;

        (d)  Liens on property existing at the time of acquisition of such
property by the Company or a Subsidiary or Liens on the property of any Person
existing at the time such Person becomes a Restricted Subsidiary of the Company
or is merged with the Company in compliance with Article V hereof and in either
case not incurred as a result of (or in connection with or in anticipation of)
the acquisition of such property or such Person becoming a Restricted Subsidiary
of the Company or being merged with the Company, provided that such Liens do not
extend to or cover any property or assets of the Company or any of its
Restricted Subsidiaries other than the property so acquired;

        (e)  Liens on any property securing (i) Indebtedness incurred in
connection with the construction, installation or financing of pollution control
or abatement facilities or other forms of industrial revenue bond financing or
(ii) Indebtedness issued or guaranteed by the United States or any State thereof
or any department, agency or instrumentality of either;

        (f)  any Lien extending, renewing or replacing (or successive
extensions, renewals or replacements of) any Lien of any type permitted under
clauses (a) through (e) above, provided that such Lien extends to or covers only
the property that is subject to the Lien being extended, renewed or replaced;

        (g)  any Ordinary Course Lien arising, but only so long as continuing,
in the ordinary course of business of the Company and the Restricted
Subsidiaries;

        (h)  any Lien resulting from the deposit of moneys or evidences of
Indebtedness in trust for the purpose of defeasing Indebtedness of the Company
or any Subsidiary; or

        (i)  Liens (exclusive of any Lien of any type otherwise permitted under
clauses (a) through (h) above) securing Indebtedness of the Company or any
Restricted Subsidiary in an aggregate principal amount which, together with the
aggregate amount of Attributable Indebtedness deemed to be outstanding in
respect of all Sale/Leaseback Transactions entered into pursuant to clause (a)
of Section 4.08 (exclusive of any such Sale/Leaseback Transactions otherwise
permitted under clauses (a) through (h) above), does not at the time such
Indebtedness is incurred exceed 5% of the Consolidated Net Tangible Assets of
the Company (as shown in the most recent audited consolidated balance sheet of
the Company and its Subsidiaries).

                                       26
<PAGE>
 
          Notwithstanding the foregoing, nothing in this Section 4.09 shall be
deemed to prohibit or otherwise limit the following types of transactions:

          (1) the sale, granting of Liens with respect to, or other transfer of,
crude oil, natural gas or other petroleum hydrocarbons in place for a period of
time until, or in an amount such that, the transferee will realize therefrom a
specified amount (however determined) of money or of such crude oil, natural gas
or other petroleum hydrocarbons;

          (2) the sale or other transfer of any other interest in property of
the character commonly referred to as a production payment, overriding royalty,
forward sale or similar interest;

          (3) the entering into of Hedging Obligations although Liens securing
any Indebtedness for borrowed money that is the subject of any Hedging
Obligations shall not be permitted hereby unless permitted under clauses (a)
through (i) above; or

          (4) the granting of Liens required by any contract or statute in order
to permit the Company or any Restricted Subsidiary to perform any contract or
subcontract made by it with or at the request of the United States or any State
thereof or any department, agency or instrumentality of either, or to secure
partial, progress, advance or other payments to the Company or any Restricted
Subsidiary by such governmental unit pursuant to the provisions of any contract
or statute.

    
SECTION 4.10 Addition of Guarantors.

          (a) If any Subsidiary of the Company guarantees any Funded 
Indebtedness of the Company at any time subsequent to the Issue Date, then the 
Company shall (i) cause the Securities to be equally and ratably guaranteed by 
such Subsidiary, but only to the extent that the Securities are not already 
guaranteed by such Subsidiary on reasonably comparable terms and (ii) cause such
Subsidiary to execute and deliver a supplemental indenture evidencing its 
provision of a guarantee in accordance with clause (b) below.

          (b) Any Person may become a guarantor of the Securities by executing 
and delivering to the Trustee (i) a supplemental indenture in form and substance
satisfactory to the Trustee which subjects such Person to the provisions 
(including the representations and warranties) of this Indenture as a guarantor 
and (ii) an Opinion of Counsel and Officers' Certificate to the effect that such
supplemental indenture has been duly authorized and executed by such Person and 
constitutes the legal, valid, binding and enforceable obligation of such Person 
(subject to such customary exceptions concerning creditors' rights and equitable
principles as may be acceptable to the Trustee in its discretion and provided 
that no opinion need be rendered concerning the enforceability of such 
guarantee) and that the issuance of the guarantee is in compliance with 
applicable federal and state securities laws.     

                                   ARTICLE V

                                  SUCCESSORS

Section  5.01 Limitations on Mergers and Consolidations.

          The Company shall not consolidate or merge with or into any Person, or
sell, lease, convey or otherwise dispose of all or substantially all of its
assets, or assign any of its obligations hereunder or under the Securities, to
any Person, unless:

          (a) the Person formed by or surviving such consolidation or merger (if
other than the Company), or to which such sale, lease, conveyance or other
disposition or assignment shall be made (collectively, the "Successor"), is a
corporation organized and existing under the laws of the United States or any
State thereof or the District of Columbia, and the Successor assumes by
supplemental indenture in a form satisfactory to the Trustee all of the
obligations of the Company, under this Indenture and the Securities;

          (b) immediately after giving effect to such transaction, no Default or
Event of Default shall have occurred and be continuing; and

                                       27
<PAGE>
 
          (c)  the Company shall have delivered to the Trustee prior to the
consummation of the proposed transaction an Officers' Certificate and an Opinion
of Counsel, each stating that the proposed transaction and such supplemental
indenture comply with this Indenture.

Section 5.02 Successor Corporation Substituted.

          Upon any consolidation or merger of the Company with or into any
Person, or any sale, lease, conveyance or other disposition of all or
substantially all of the assets of the Company or any assignment of the
obligations of the Company under this Indenture or the Securities in accordance
with Section 5.01, the Successor formed by such consolidation or into or with
which the Company is merged or to which such sale, lease, conveyance or other
disposition or assignment is made shall succeed to, and be substituted for, and
may exercise every right and power of, the Company, under this Indenture and the
Securities with the same effect as if such Successor had been named as the
Company herein and the predecessor Company in the case of a sale, lease,
conveyance or other disposition or assignment, shall be released from all
obligations under this Indenture and the Securities.


                                   ARTICLE VI

DEFAULTS AND REMEDIES
Section 6.01 Events of Default.

          An "Event of Default" occurs if:

          (1) the Company defaults in the payment of interest on any Security
          when the same becomes due and payable and the Default continues for a
          period of 30 days;

          (2) the Company defaults in the payment of the principal of or
          premium, if any, on any Security when the same becomes due and payable
          at Stated Maturity, upon acceleration or otherwise;

          (3) the Company fails to comply with any of its other agreements or
          covenants in, or provisions of, the Securities, or this Indenture and
          such failure continues for the period and after the notice specified
          in the last paragraph of this Section 6.01;

          (4) any default shall occur which results in the acceleration of the
          maturity of any Indebtedness of the Company or any Restricted
          Subsidiary (other than the Securities) having an outstanding principal
          amount of $5 million or more individually or, taken together with all
          other such Indebtedness that has been so accelerated, in the
          aggregate; or any default shall occur in the payment of any principal
          or interest in respect of any Indebtedness of the Company or any
          Restricted Subsidiary (other than the Securities) having an
          outstanding

                                       28
<PAGE>
 
          principal amount of $5 million or more individually or, taken together
          with all other such Indebtedness with respect to which any such
          payment has not been made, in the aggregate and such default shall be
          continuing for a period of 30 days without the Company or such
          Restricted Subsidiary, as the case may be, effecting a cure of such
          default;

          (5) failure by the Company or any Restricted Subsidiary to pay final,
          non-appealable judgments aggregating in excess of $10 million, which
          judgments are not paid, discharged or stayed for a period of 60 days;

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

          (a) commences a voluntary case,

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

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

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

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

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

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

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

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

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

          A Default under clause (3) is not an Event of Default until the
Trustee notifies the Company  or the Holders of at least 25% in principal amount
of the then outstanding Securities notify the Company, and the Trustee, of the
Default, and the Company does not cure the Default within 60 days after receipt
of the notice.  The notice must specify the Default, demand that it be remedied
and state that the notice is a "Notice of Default."

                                       29
<PAGE>
 
Section  6.02 Acceleration.

      If an Event of Default (other than an Event of Default specified in
clauses (6) or (7) of Section 6.01) occurs and is continuing, the Trustee by
notice to the Company, or the Holders of at least 25% in principal amount of the
then outstanding Securities by notice to the Company and the Trustee, may
declare the principal of and premium, if any, and accrued and unpaid interest on
all then outstanding Securities to be due and payable immediately.  Upon any
such declaration the amounts due and payable on the Securities, as determined in
accordance with the next succeeding paragraph, shall be due and payable
immediately.  If an Event of Default specified in clause (6) or (7) of Section
6.01 occurs, such amounts shall ipso facto become and be immediately due and
payable without any declaration, notice or other act on the part of the Trustee
or any Holder.  The Holders of a majority in principal amount of the then
outstanding Securities by written notice to the Trustee may rescind an
acceleration and its consequences (other than nonpayment of principal of, or
premium, if any, or interest on the Securities) if the rescission would not
conflict with any judgment or decree and if all existing Events of Default have
been cured or waived.

      In the event that the maturity of the Securities is accelerated
pursuant to this Section 6.02, 100% of the principal amount thereof shall become
due and payable plus accrued interest to the date of payment.

Section  6.03 Other Remedies.

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

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

Section  6.04 Waiver of Past Defaults.

      Subject to Sections 6.07 and 9.02, the Holders of a majority in
principal amount of the then outstanding Securities by notice to the Trustee may
waive an existing Default or Event of Default and its consequences (including
waivers obtained in connection with a tender offer or exchange offer for
Securities or a solicitation of consents in respect of Securities, provided that
in each case such offer or solicitation is made to all Holders of then
outstanding Securities on equal terms), except a continuing Default or Event of
Default in the payment of the principal of, or premium, if any, or interest on
any Security.  Upon any such waiver, such Default shall cease to exist, and any
Event of Default arising therefrom shall be deemed to have been cured for every
purpose of this Indenture; 

                                       30
<PAGE>
 
but no such waiver shall extend to any subsequent or other Default or impair any
right consequent thereon.

Section 6.05 Control by Majority.

      The Holders of a majority in principal amount of the then outstanding
Securities may direct the time, method and place of conducting any proceeding
for any remedy available to the Trustee or exercising any trust or power
conferred on it hereunder.  However, the Trustee may refuse to follow any
direction that conflicts with applicable law or this Indenture, that the Trustee
determines may be unduly prejudicial to the rights of other Holders, or that may
involve the Trustee in personal liability.

Section 6.06 Limitations on Suits.
      
      Subject to Section 6.07, a Holder may pursue a remedy with respect to
this Indenture or the Securities only if:

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

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

      (3)    such Holder or Holders offer to the Trustee indemnity satisfactory
      to the Trustee against any loss, liability or expense;

      (4)    the Trustee does not comply with the request within 60 days after
      receipt of the request and the offer of indemnity; and

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

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

Section 6.07 Rights of Holders to Receive Payment.

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


                                       31
<PAGE>
 
Section 6.08 Collection Suit by Trustee.

      If an Event of Default specified in Section 6.01(1) or (2) occurs and
is continuing, the Trustee is authorized to recover judgment in its own name and
as trustee of an express trust against the Company for the amount of principal,
premium, if any, and interest remaining unpaid on the Securities, and interest
on overdue principal and premium, if any, and, to the extent lawful, interest on
overdue interest, and such further amount as shall be sufficient to cover the
costs and expenses of collection, including the reasonable compensation,
expenses, disbursements and advances of the Trustee, its agents and counsel.

Section 6.09 Trustee May File Proofs of Claim.

      The Trustee is authorized to file such proofs of claim and other papers or
documents and to take such actions, including participating as a member, voting
or otherwise, of any committee of creditors, as may be necessary or advisable in
order to have the claims of the Trustee (including any claim for the reasonable
compensation, expenses, disbursements and advances of the Trustee, its agents
and counsel) and the Holders allowed in any judicial proceedings relative to the
Company or its creditors or properties and shall be entitled and empowered to
collect, receive and distribute any money or other property payable or
deliverable on any such claims and any Custodian in any such judicial proceeding
is hereby authorized by each Holder to make such payments to the Trustee, and in
the event that the Trustee shall consent to the making of such payments directly
to the Holders, to pay to the Trustee any amount due to it for the reasonable
compensation, expenses, disbursements and advances of the Trustee, its agents
and counsel, and any other amounts due the Trustee under Section 7.07. To the
extent that the payment of any such compensation, expenses, disbursements and
advances of the Trustee, its agents and counsel, and any other amounts due the
Trustee under Section 7.07 out of the estate in any such proceeding, shall be
denied for any reason, payment of the same shall be secured by a Lien on, and
shall be paid out of, any and all distributions, dividends, money, securities
and other properties which the Holders of the Securities may be entitled to
receive in such proceeding whether in liquidation or under any plan of
reorganization or arrangement or otherwise. Nothing herein contained shall be
deemed to authorize the Trustee to authorize or consent to or accept or adopt on
behalf of any Holder any plan of reorganization, arrangement, adjustment or
composition affecting the Securities or the rights of any Holder thereof, or to
authorize the Trustee to vote in respect of the claim of any Holder in any such
proceeding.

Section 6.10 Priorities.

      If the Trustee collects any money pursuant to this Article, it shall pay
out the money in the following order:
      
      First:  to the Trustee for amounts due under Section 7.07;


                                       32
<PAGE>
 
      Second:  to Holders for amounts due and unpaid on the Securities for
principal, premium, if any, and interest ratably, without preference or priority
of any kind, according to the amounts due and payable on the Securities for
principal, premium, if any, and interest, respectively; and

      Third: to the Company.

      The Trustee may fix a record date and payment date for any payment to
Holders pursuant to this Article.

Section 6.11 Undertaking for Costs.

      In any suit for the enforcement of any right or remedy under this
Indenture or in any suit against the Trustee for any action taken or omitted by
it as a Trustee, a court in its discretion may require the filing by any party
litigant in the suit of an undertaking to pay the costs of the suit, and the
court in its discretion may assess reasonable costs, including reasonable
attorneys' fees, against any party litigant in the suit, having due regard to
the merits and good faith of the claims or defenses made by the party litigant.
This Section does not apply to a suit by the Trustee, a suit by a Holder
pursuant to Section 6.07, or a suit by a Holder or Holders of more than 10% in
principal amount of the then outstanding Securities.

                                  ARTICLE VII

                                    TRUSTEE

Section 7.01 Duties of Trustee.

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

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

      (a)    the Trustee need perform only those duties that are specifically
set forth in this Indenture and no others, and no implied covenants or
obligations shall be read into this Indenture against the Trustee; and

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


                                       33
<PAGE>
 
      (3)    The Trustee may not be relieved from liabilities for its own
      negligent action, its own negligent failure to act, or its own willful
      misconduct, except that:

      (a)    this paragraph does not limit the effect of paragraph (2) of this
      Section;

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

      (c)    the Trustee shall not be liable with respect to any action it takes
      or omits to take in good faith in accordance with a direction received by
      it pursuant to Section 6.05.

      (4)    Whether or not therein expressly so provided, every provision of
      this Indenture that in any way relates to the Trustee is subject to
      paragraphs (1), (2) and (3) of this Section.

      (5)    No provision of this Indenture shall require the Trustee to expend
      or risk its own funds or incur any liability. The Trustee may refuse to
      perform any duty or exercise any right or power unless it receives
      indemnity satisfactory to it against any loss, liability or expense.

      (6)    The Trustee shall not be liable for interest on any money received
      by it except as the Trustee may agree in writing with the Company. Money
      held in trust by the Trustee need not be segregated from other funds
      except to the extent required by law. All money received by the Trustee
      shall, until applied as herein provided, be held in trust for the payment
      of the principal of, and premium, if any, and interest on the Securities.

Section 7.02 Rights of Trustee.

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

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

      (3)    The Trustee may act through agents and attorneys and shall not be
      responsible for the misconduct or negligence of any agent or attorney
      appointed with due care.


                                       34
<PAGE>
 
        (4)     The Trustee shall not be liable for any action it takes or omits
        to take in good faith which it believes to be authorized or within its
        rights or powers conferred upon it by this Indenture.

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

        (6)     The permissive rights of the Trustee to do things enumerated in
        this Indenture shall not be construed as a duty, and the Trustee shall
        not be answerable for other than its negligent action, negligent
        omission or its willful misconduct.

        (7)     The Trustee shall not be charged with knowledge of any Event of
        Default under Section 6.01 (other than an Event of Default under Section
        6.01(a) or (b) if the Trustee is also the Paying Agent with respect to
        the Securities) hereof or the existence of any Subsidiary of the Company
        unless either (1) a Trust Officer of the Trustee shall have actual
        knowledge thereof or (2) the Trustee shall have received notice thereof
        in accordance with Section 10.02 hereof from the Company or a Holder.

Section 7.03 Individual Rights of Trustee.

        The Trustee in its individual or any other capacity may become the
owner or pledgee of Securities and may otherwise deal with the Company, or any
of its Affiliates with the same rights it would have if it were not Trustee.
Any Agent may do the same with like rights.  However, the Trustee is subject to
Sections 7.10 and 7.11.

Section 7.04 Trustee's Disclaimer.

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

Section 7.05 Notice of Defaults.

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

                                       35
<PAGE>
 
Section 7.06 Reports by Trustee to Holders.

      Within 60 days after each January 31, beginning with January 31, 1998,
and in any event on or before April 1 in each year, the Trustee shall mail to
Holders a brief report dated as of such January 31 that complies with TIA (S)
313 (a); provided, however, that if no event described in TIA (S) 313 (a) has
occurred within the twelve months preceding the reporting date, no report need
be transmitted.  The Trustee also shall comply with TIA (S) 313 (b).  The
Trustee shall also transmit by mail all reports as required by TIA (S) 313 (c).

      A copy of each report at the time of its mailing to Holders shall be filed
with the SEC and each securities exchange, if any, on which the Securities are
listed. The Company shall notify the Trustee when the Securities are listed on
any stock exchange.

Section 7.07 Compensation and Indemnity.

      The Company agrees to pay to the Trustee from time to time reasonable
compensation for its acceptance of this Indenture and services hereunder.  The
Trustee's compensation shall not be limited by any law on compensation of a
trustee of an express trust.  The Company agrees to reimburse the Trustee upon
request for all reasonable disbursements, advances and expenses incurred or made
by it in accordance with any provision of this Indenture.  Such expenses shall
include the reasonable compensation, disbursements and expenses of the Trustee's
agents and counsel.

      Except as set forth in the next paragraph, the Company agrees to indemnify
the Trustee against any loss, liability or expense incurred by it arising out of
or in connection with the acceptance or administration of its duties under this
Indenture, including the costs and expenses of defending itself against any
claim of liability in connection with the exercise or performance of any of its
duties hereunder. The Trustee shall notify the Company promptly of any claim for
which it may seek indemnity. The Company shall defend the claim and the Trustee
shall cooperate in the defense. The Trustee may have separate counsel and the
Company shall pay the reasonable fees and expenses of such counsel. The Company
need not pay for any settlement made without its consent, which consent shall
not be unreasonably withheld.

      The Company shall not be obligated to reimburse any expense or indemnify
against any loss or liability incurred by the Trustee through negligence or bad
faith, as determined by a court of competent jurisdiction.

      To secure the payment obligations of the Company in this Section, the
Trustee shall have a Lien prior to the Securities on all money or property held
or collected by the Trustee, except that held in trust to pay principal of and
premium, if any, and interest on particular Securities.  Such Lien shall survive
the satisfaction and discharge of this Indenture.



                                       36
<PAGE>
 
      When the Trustee incurs expenses or renders services after an Event of
Default specified in Section 6.01(6) or (7) occurs, the expenses and the
compensation for the services are intended to constitute expenses of
administration under any Bankruptcy Law.

Section 7.08 Replacement of Trustee.

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

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

             (i)    the Trustee fails to comply with Section 7.10;

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

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

             (iv)   the Trustee otherwise becomes incapable of acting.

      If the Trustee resigns or is removed or if a vacancy exists in the office
of Trustee for any reason, the Company shall promptly appoint a successor
Trustee.

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

      If the Trustee fails to comply with Section 7.10, any Holder may petition
any court of competent jurisdiction for the removal of the Trustee and the
appointment of a successor Trustee.

      A successor Trustee shall deliver a written acceptance of its appointment
to the retiring Trustee and to the Company. Thereupon the resignation or removal
of the retiring Trustee shall become effective, and the successor Trustee shall
have all the rights, powers and duties of the Trustee under this Indenture. The
successor Trustee shall mail a notice of its succession to Holders. The retiring
Trustee shall promptly transfer all property held by it as Trustee to the
successor Trustee, subject to the Lien provided for in Section 7.07.
Notwithstanding replacement of the Trustee pursuant to this Section 7.08, the
obligations of the Company under Section 7.07 shall continue for the benefit of
the retiring Trustee.



                                       37
<PAGE>
 
Section 7.09 Successor Trustee by Merger, etc.

      Subject to Section 7.10, if the Trustee consolidates, merges or converts
into, or transfers all or substantially all of its corporate trust business to,
another corporation, the successor corporation without any further act shall be
the successor Trustee; provided, however, that in the case of a transfer of all
or substantially all of its corporate trust business to another corporation, the
transferee corporation expressly assumes all of the Trustee's liabilities,
duties and responsibilities hereunder.

      In case any Securities shall have been authenticated, but not delivered,
by the Trustee then in office, any successor by merger, conversion or
consolidation to such authenticating Trustee may adopt such authentication and
deliver the Securities so authenticated, with the same effect as if such
successor Trustee had itself authenticated such Securities.

Section 7.10 Eligibility; Disqualification.

      There shall at all times be a Trustee hereunder which shall be a
corporation organized and doing business under the laws of the United States of
America, any State thereof or the District of Columbia and authorized under such
laws to exercise corporate trust powers, shall be subject to supervision or
examination by Federal or State (or the District of Columbia) authority and
shall have a combined capital and surplus of at least $50 million as set forth
in its most recent published report of condition.

      The Indenture shall always have a Trustee who satisfies the requirements
of TIA (S)(S) 310(a) (1), 310 (a) (2) and 310 (a) (5). The Trustee is subject to
and shall comply with the provisions of TIA (S) 310 (b) during the period of
time required by this Indenture. Nothing in this Indenture shall prevent the
Trustee from filing with the SEC the application referred to in the penultimate
paragraph of TIA (S) 310(b).

Section 7.11 Preferential Collection of Claims Against Company.

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

                                 ARTICLE VIII

                            DISCHARGE OF INDENTURE

Section 8.01 Termination of Company's Obligations.

      (1)    This Indenture shall cease to be of further effect (except that the
      Company's obligations under Section 7.07 and the Trustee's and Paying
      Agent's obligations under Section 8.03 shall survive), and the Trustee, on
      demand and expense of the Company, shall



                                       38
<PAGE>
 
      execute proper instruments acknowledging the satisfaction and discharge of
      this Indenture, when:

      (a)    either
      
             (i)    all outstanding Securities theretofore authenticated and
      issued (other than destroyed, lost or stolen Securities that have been
      replaced or paid) have been delivered to the Trustee for cancellation; or

             (ii)   all outstanding Securities not theretofore delivered to the
      Trustee for cancellation:

                    (A)  have become due and payable, or

                    (B)  will become due and payable at their Stated Maturity
             within one year, or

                    (C)  are to be called for redemption within one year under
             arrangements satisfactory to the Trustee for the giving of notice
             of redemption by the Trustee in the name, and at the expense, of
             the Company,

      and the Company, in the case of clause (A), (B) or (C) above, has
      deposited or caused to be deposited with the Trustee as funds (immediately
      available to the Holders in the case of clause (A)) in trust for the
      purpose an amount which, together with earnings thereon, will be
      sufficient to pay and discharge the entire indebtedness on such Securities
      for principal, premium, if any, and interest to the date of such deposit
      (in the case of Securities which have become due and payable) or to the
      Stated Maturity or Redemption Date, as the case may be;

      (b)    the Company has paid of caused to be paid all other sums payable by
it hereunder; and

      (c)    the Company has delivered to the Trustee an Officers' Certificate
stating that all conditions precedent to satisfaction and discharge of this
Indenture have been complied with, together with an Opinion of Counsel to the
same effect.

      (2)    The Company may terminate all of its obligations under this
      Indenture, except as provided below, if:

      (a)    the Company irrevocably deposits in trust with the Trustee money or
U.S. Government Obligations sufficient to pay principal of and interest on the
Securities to maturity, and to pay all other sums payable by it hereunder,
provided that the Trustee shall have been irrevocably instructed to apply such
money or the proceeds of such U.S. Government Obligations to the payment of said
principal and interest with respect to the Securities as the same shall become
due;


                                       39
<PAGE>
 
          (b)  the Company delivers to the Trustee an Officers' Certificate
stating that all conditions precedent to satisfaction and discharge of this
Indenture have been complied with, and an Opinion of Counsel to the same effect;

          (c)  no Default or Event of Default shall have occurred and be
continuing on the date of such deposit; and

          (d)  the Company shall have delivered to the Trustee an Opinion of
Counsel from nationally recognized counsel acceptable to the Trustee or a tax
ruling to the effect that the Holders of the Securities will not recognize
income, gain or loss for federal income tax purposes as a result of the
Company's exercise of its option under this Section 8.01(2) and will be subject
to federal income tax on the same amount and in the same manner and at the same
times as would have been the case if such option had not been exercised.

          In such event, this Indenture shall cease to be of further effect
(except as provided in the next succeeding paragraph), and the Trustee, on
demand and expense of the Company, shall execute proper instruments
acknowledging confirmation of and discharge under this Indenture.

          However, the Company's obligations in Sections 2.05, 2.06, 2.07, 2.08,
2.10, 2.11, 4.01, 7.07, 7.08 and 8.04, and the Company's, the Trustee's and
Paying Agent's obligations in Section 8.03 shall survive until the Securities
are no longer outstanding.

          Thereafter, only the Company's obligations in Section 7.07 and the
Trustee's and Paying Agent's obligations in Section 8.03 shall survive.

          After such irrevocable deposit made pursuant to this Section 8.01(2)
and satisfaction of the other conditions set forth herein, the Trustee upon
request and expense of the Company shall acknowledge in writing the discharge of
the Company's obligations under this Indenture except for those surviving
obligations specified above.

          In order to have money available on a payment date to pay principal of
or interest on the Securities, the U.S. Government Obligations shall be payable
as to principal or interest on or before such payment date in such amounts as
will provide the necessary money.  U.S. Government Obligations shall not be
callable at the issuer's option.

Section 8.02 Application of Trust Money.

          The Trustee shall hold in trust money or U.S. Government Obligations
deposited with it pursuant to Section 8.01. It shall apply the deposited money
and the money from U.S. Government Obligations through the Paying Agent and in
accordance with this Indenture to the payment of principal of and premium, if
any, and interest on the Securities.

                                       40
<PAGE>
 
Section 8.03 Repayment to Company.

        The Trustee and the Paying Agent shall promptly pay to the Company
upon written request any excess money or securities held by them at any time.

        The Trustee and the Paying Agent shall pay to the Company upon written
request any money held by them for the payment of principal, premium, if any, or
interest that remains unclaimed for two years after the date upon which such
payment shall have become due; provided, however, that the Company shall have
either caused notice of such payment to be mailed to each Holder entitled
thereto no less than 30 days prior to such repayment or within such period shall
have published such notice in a financial newspaper of widespread circulation
published in The City of New York.  After payment to the Company, Holders
entitled to the money must look to the Company for payment as general creditors
unless an applicable abandoned property law designates another Person, and all
liability of the Trustee and the Paying Agent with respect to such money shall
cease.

Section 8.04 Reinstatement.

        If the Trustee or the Paying Agent is unable to apply any money or
U.S. Government Obligations in accordance with Section 8.01 by reason of any
legal proceeding or by reason of any order or judgment of any court or
governmental authority enjoining, restraining or otherwise prohibiting such
application, the obligations of the Company under this Indenture and the
Securities shall be revived and reinstated as though no deposit had occurred
pursuant to Section 8.01 until such time as the Trustee or the Paying Agent is
permitted to apply all such money or U.S. Government Obligations in accordance
with Section 8.01; provided, however, that if the Company has made any payment
of principal of or premium, if any, or interest on any Securities because of the
reinstatement of its obligations, the Company shall be subrogated to the rights
of the Holders of such Securities to receive such payment from the money or U.S.
Government Obligations held by the Trustee or the Paying Agent.

                                  ARTICLE IX

                                  AMENDMENTS

Section 9.01 Without Consent of Holders.

        The Company, and the Trustee may amend this Indenture or the Securities
or waive any provision hereof or thereof without the consent of any Holder:

        (1)     to cure any ambiguity, omission, defect or inconsistency;

        (2)     to comply with Section 5.01;


                                       41
<PAGE>
 
          (3) to provide for uncertificated Securities in addition to or in
          place of certificated Securities;

          (4) to comply with any requirement in order to effect or maintain the
          qualification of this Indenture under the TIA; or

          (5) to make any change that does not adversely affect the rights
          hereunder of any Holder in any material respect.

          Upon the request of the Company, accompanied by a resolution of the
Board of Directors  (certified by the Secretary or an Assistant Secretary of the
Company) authorizing the execution of any such supplemental indenture, and upon
receipt by the Trustee of the documents described in Section 9.06, the Trustee
shall join with the Company in the execution of any supplemental indenture
authorized or permitted by the terms of this Indenture and make any further
appropriate agreements and stipulations that may be therein contained.  After an
amendment or waiver under this Section becomes effective, the Company shall mail
to the Holders of each Security affected thereby a notice briefly describing the
amendment or waiver.  Any failure of the Company to mail such notice, or any
defect therein, shall not, however, in any way impair or affect the validity of
any such supplemental indenture.

Section 9.02 With Consent of Holders.

          Except as provided below in this Section 9.02, the Company, and the
Trustee may amend this Indenture or the Securities with the written consent
(including consents obtained in connection with a tender offer or exchange offer
for Securities or a solicitation of consents in respect of Securities, provided
that in each case such offer or solicitation is made to all Holders of then
outstanding Securities on equal terms) of the Holders of at least a majority in
principal amount of the then outstanding Securities.

          Upon the request of the Company accompanied by a resolution of the
Board of Directors (certified by the Secretary or an Assistant Secretary of the
Company) authorizing the execution of any such supplemental indenture, and upon
the filing with the Trustee of evidence of the consent of the Holders as
aforesaid, and upon receipt by the Trustee of the documents described in Section
9.06, the Trustee shall join with the Company in the execution of such
supplemental indenture.

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

          The Holders of a majority in principal amount of the then outstanding
Securities may waive compliance in a particular instance by the Company with any
provision of this Indenture or the Securities (including waivers obtained in
connection with a tender offer or exchange offer for Securities or a
solicitation of consents in respect of Securities, provided that in each case
such offer 

                                       42
<PAGE>
 
or solicitation is made to all Holders of then outstanding Securities on equal
terms). However, without the consent of each Holder affected, an amendment or
waiver under this Section may not:

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

          (2) reduce the rate of or change the time for payment of interest,
          including default interest, on any Security;

          (3) reduce the principal of or change the fixed maturity of any
          Security or alter the premium or other provisions with respect to
          redemption under Section 3.07 or specified in the Securities;

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

          (5) impair the right to institute suit for the enforcement of any
          payment of principal of, or premium, if any, or interest on any
          Security pursuant to Sections 6.06 and 6.07, except as limited by
          Section 6.06;

          (6) make any change in the percentage of principal amount of
          Securities necessary to waive compliance with certain provisions of
          this Indenture pursuant to Section 6.04 or 6.07 or this sentence of
          this Section 9.02; or

          (7) waive a continuing Default or Event of Default in the payment of
          principal of, or premium, if any, or interest on the Securities.

          The right of any Holder to participate in any consent required or
sought pursuant to any provision of this Indenture (and the obligation of the
Company to obtain any such consent otherwise required from such Holder) may be
subject to the requirement that such Holder shall have been the Holder of record
of any Securities with respect to which such consent is required or sought as of
a date identified by the Trustee in a notice furnished to Holders in accordance
with the terms of this Indenture.

Section 9.03 Compliance with Trust Indenture Act .

          Every amendment to this Indenture or the Securities shall comply in
form and substance with the TIA as then in effect.

Section 9.04 Revocation and Effect of Consents .

          Until an amendment (which includes any supplement) or waiver becomes
effective, a consent to it by a Holder of a Security is a continuing consent by
the Holder and every subsequent Holder of a Security or portion of a Security
that evidences the same debt as the consenting Holder's 

                                       43
<PAGE>
 
Security, even if notation of the consent is not made on any Security. However,
any such Holder or subsequent Holder may revoke the consent as to his or her
Security or portion of a Security if the Trustee receives written notice of
revocation before the date the amendment or waiver becomes effective. An
amendment or waiver becomes effective in accordance with its terms and
thereafter binds every Holder.

          The Company may, but shall not be obligated to, fix a record date for
the purpose of determining the Holders entitled to consent to any amendment or
waiver.  If the Company elects to fix a record date for such purpose, the record
date shall be fixed at (i) the later of 30 days prior to the first solicitation
of such consent or the date of the most recent list of Holders furnished to the
Trustee prior to such solicitation pursuant to Section 2.13, or (ii) such other
date as the Company shall designate.  If a record date is fixed, then
notwithstanding the provisions of the immediately preceding paragraph, those
Persons who were Holders at such record date (or their duly designated proxies),
and only those Persons, shall be entitled to consent to such amendment or waiver
or to revoke any consent previously given, whether or not such Persons continue
to be Holders after such record date.  No consent shall be valid or effective
for more than 90 days after such record date unless consents from Holders of the
principal amount of Securities required hereunder for such amendment or waiver
to be effective shall have also been given and not revoked within such 90-day
period.

          After an amendment or waiver becomes effective, it shall bind every
Holder, unless it is of the type described in any of clauses (1) through (7) of
Section 9.02. In such case, the amendment or waiver shall bind each Holder of a
Security who has consented to it and every subsequent Holder of a Security that
evidences the same debt as the consenting Holder's Security.

Section 9.05 Notation on or Exchange of Securities.

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

Section 9.06 Trustee to Sign Amendments, etc.

          The Trustee shall sign any amendment or supplemental indenture
authorized pursuant to this Article if the amendment does not adversely affect
the rights, duties, liabilities or immunities of the Trustee.  If it does, the
Trustee may, but need not, sign it.  In signing or refusing to sign such
amendment or supplemental indenture, the Trustee shall be entitled to receive
and, subject to Section 7.01, shall be fully protected in relying upon, an
Officers' Certificate and Opinion of Counsel as conclusive evidence that such
amendment or supplemental indenture is authorized or permitted by this
Indenture, that it is not inconsistent herewith, and that it will be valid and
binding upon the Company in accordance with its terms.

                                       44
<PAGE>
 
                                   ARTICLE X

                                 MISCELLANEOUS
Section 10.01 Trust Indenture Act Controls.

      If any provision of this Indenture limits, qualifies or conflicts with
the duties imposed by TIA (S) 318(c) the imposed duties shall control.

Section 10.02 Notices.

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

          If to the Company:

               Barrett Resources Corporation
               1515 Arapahoe Street, Tower 3, Suite 1000
               Denver, CO 80202
               Attention: General Counsel

          If to the Trustee:

               Bankers Trust Company
               Corporate Trust and Agency Group
               4 Albany Street
               New York, New York 10006
               Attention: Corporate Market Services

          The Company, or the Trustee by notice to the other may designate
additional or different addresses for subsequent notices or communications.

          All notices and communications shall be deemed to have been duly
given: at the time delivered by hand, if personally delivered; five Business
Days after being deposited in the mail, postage prepaid, if mailed; when
answered back, if telexed; when receipt acknowledged, if telecopied; and the
next Business Day after timely delivery to the courier, if sent by overnight air
courier guaranteeing next day delivery.

          Any notice or communication to a Holder shall be mailed by first-class
mail, postage prepaid, to the Holder's address shown on the register kept by the
Registrar.  Failure to mail a notice or communication to a Holder or any defect
in it shall not affect its sufficiency with respect to other Holders.

                                       45
<PAGE>
 
          If a notice or communication is mailed in the manner provided above
within the time prescribed, it is duly given, whether or not the addressee
receives it.

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

Section 10.03 Communication by Holders with Other Holders.

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

Section 10.04 Certificate and Opinion as to Conditions Precedent.

          Upon any request or application by the Company to the Trustee to take
any action under this Indenture, the Company shall furnish to the Trustee:

          (1) an Officers' Certificate (which shall include the statements set
          forth in Section 10.05) stating that, in the opinion of the signers,
          all conditions precedent and covenants, if any, provided for in this
          Indenture relating to the proposed action have been complied with; and

          (2) an Opinion of Counsel (which shall include the statements set
          forth in Section 10.05) stating that, in the opinion of such counsel,
          all such conditions precedent and covenants have been complied with.

Section 10.05 Statements Required in Certificate or Opinion.

          Each certificate or opinion with respect to compliance with a
condition or covenant provided for in this Indenture shall include:

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

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

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

          (4) a statement as to whether or not, in the opinion of such Person,
          such condition or covenant has been complied with.

                                       46
<PAGE>
 
Section 10.06 Rules by Trustee and Agents.

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

Section 10.07 Legal Holidays.

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

Section 10.08 No Recourse Against Others.

          A director, officer, employee or stockholder of the Company, as such,
shall not have any liability for any obligations of the Company under the
Securities or this Indenture or for any claim based on, in respect of or by
reason of such obligations or their creation.  Each Holder by accepting a
Security waives and releases all such liability.

Section 10.09 Governing Law.

          This Indenture and the Securities shall be governed by and construed
in accordance with the laws of the State of New York, without regard to
principles of conflicts of law.

Section 10.10 No Adverse Interpretation of Other Agreements.

          This Indenture may not be used to interpret another indenture, loan or
debt agreement of the Company, or any Subsidiary of the Company.  Any such
indenture, loan or debt agreement may not be used to interpret this Indenture.

Section 10.11 Successors.

          All agreements of the Company in this Indenture and the Securities
shall bind its Successor.  All agreements of the Trustee in this Indenture shall
bind its successor.

Section 10.12 Severability.

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

                                       47
<PAGE>
 
Section 10.13 Counterpart Originals.

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

Section 10.14 Trustee as Paying Agent and Registrar.

          The Company initially appoints the Trustee as Paying Agent and
Registrar.

Section 10.15 Table of Contents, Headings, etc.

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

                                       48
<PAGE>
 
          IN WITNESS WHEREOF, the parties hereto have caused this Indenture to
be duly executed as of the day and year first above written.

                                    BARRETT RESOURCES CORPORATION


                                    By:  ____________________________
                                    Title: Vice President - Finance

                                    BANKERS TRUST COMPANY, as Trustee


                                    By:  ____________________________
                                    Title: Vice President

                                       49
<PAGE>
 
                                                                       EXHIBIT A


                               [FACE OF SECURITY]
                         BARRETT RESOURCES CORPORATION
                           ____% SENIOR NOTE DUE 2007

     [IF THE SECURITY IS TO BE A GLOBAL SECURITY, INSERT THE FOLLOWING - - THIS
SECURITY IS A BOOK-ENTRY SECURITY WITHIN THE MEANING OF THE INDENTURE
HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITORY OR A
NOMINEE OF A DEPOSITORY.  THIS SECURITY IS EXCHANGEABLE FOR SECURITIES
REGISTERED IN THE NAME OF A PERSON OTHER THAN THE DEPOSITORY OR ITS NOMINEE ONLY
IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE, AND NO TRANSFER OF THIS
SECURITY (OTHER THAN A TRANSFER OF THIS SECURITY AS A WHOLE BY THE DEPOSITORY TO
A NOMINEE OF THE DEPOSITORY OR BY A NOMINEE OF THE DEPOSITORY TO THE DEPOSITORY
OR ANOTHER NOMINEE OF THE DEPOSITORY) MAY BE REGISTERED EXCEPT IN SUCH LIMITED
CIRCUMSTANCES.

     UNLESS THIS SECURITY IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE
DEPOSITORY TRUST COMPANY (55 WATER STREET, NEW YORK, NEW YORK) TO THE ISSUER OR
ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY SECURITY
ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS REQUESTED
BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY AND ANY PAYMENT
HEREON IS MADE TO CEDE & CO., ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE
OR OTHERWISE BY A PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE &
CO., HAS AN INTEREST HEREIN.]

                                                                           CUSIP

No.                                                                $____________

Barrett Resources Corporation, a Delaware corporation (the "Company"), for value
received promises to pay to                      or registered assigns, the
principal sum of                 Dollars on January 15, 2007.

     Interest Payment Dates:  January 15 and July 15
     Record Dates:  __________ and __________

Reference is hereby made to the further provisions of this Security set forth on
the reverse hereof, which further provisions shall for all purposes have the
same effect as if set forth at this place.

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

Dated:

 
[SEAL]                              BARRETT RESOURCES CORPORATION

                                    By:__________________________

                                    By:__________________________


                                    Certificate of Authentication:

                                    Bankers Trust Company
                                    as Trustee, certifies that this is one of
                                       the Securities referred to in the
                                       within-mentioned Indenture.


                                    By:__________________________
                                       Authorized Signature

                                      
<PAGE>
 
                             [REVERSE OF SECURITY]
                         BARRETT RESOURCES CORPORATION
                           ____% SENIOR NOTE DUE 2007

     1. Interest. Barrett Resources Corporation, a Delaware corporation (the
"Company"), promises to pay interest on the principal amount of this Security at
___% per annum from _________, 1997 until maturity. The Company will pay
interest semiannually on January 15 and July 15 of each year (each an "Interest
Payment Date"), or if any such day is not a Business Day, on the next succeeding
Business Day. Interest on the Securities will accrue from the most recent
Interest Payment Date on which interest has been paid or, if no interest has
been paid, from _________, 1997; provided, that if there is no existing Default
in the payment of interest, and if this Security is authenticated between a
record date referred to on the face hereof and the next succeeding Interest
Payment Date, interest shall accrue from such next succeeding Interest Payment
Date; provided, further, that the first Interest Payment Date shall be July 15,
1997. The Company shall pay interest on overdue principal and premium, if any,
from time to time on demand at a rate equal to the interest rate then in effect;
it shall pay interest on overdue installments of interest (without regard to any
applicable grace periods) from time to time on demand at the same rate to the
extent lawful. Interest will be computed on the basis of a 360-day year of
twelve 30-day months.

     2. Method of Payment. The Company will pay interest on the Securities
(except defaulted interest) to the Persons who are registered Holders of
Securities at the close of business on the record date next preceding the
Interest Payment Date, even if such Securities are canceled after such record
date and on or before such Interest Payment Date. The Holder must surrender this
Security to a Paying Agent to collect principal payments. The Company will pay
the principal of, premium, if any, and interest on the Securities in money of
the United States of America that at the time of payment is legal tender for
payment of public and private debts. The Company, however, may pay such amounts
by check payable in such money. It may mail an interest check to a Holder's
registered address.

     3. Ranking. The Securities will be senior unsecured obligations of the
Company.

     4. Paying Agent and Registrar. Initially, Bankers Trust Company, the
Trustee under the Indenture, will act as Paying Agent and Registrar. The Company
may change any Paying Agent, Registrar or co-registrar without notice to any
Holder. The Company may act in any such capacity.

     5. Indenture. The Company issued the Securities under an Indenture dated as
of _________, 1997 (the "Indenture") between the Company, and the Trustee. The
terms of the Securities include those stated in the Indenture and those made
part of the Indenture by reference to the Trust Indenture Act of 1939, as
amended (15 U.S. Code (S)(S) 77aaa-77bbbb) as in effect on the date of execution
of the Indenture. The Securities are subject to all such terms, and Holders are
referred to the Indenture and such Act for a statement of such terms. The
Securities are unsecured general obligations of the Company limited to
$150,000,000 in aggregate principal amount.

<PAGE>
 
     6. Optional Redemption. The Securities may be redeemed at any time, at the
option of the Company, in whole or from time to time in part, at a price equal
to 100% of their principal amount plus accrued and unpaid interest, if any, to
the Redemption Date plus the Make-Whole Premium, if any (the "Redemption
Price"). The amount of the Make-Whole Premium with respect to any Security (or
portion thereof) to be redeemed will be equal to the excess, if any, of:

        (i)  the sum of the present values, calculated as of the Redemption
     Date, of:

             (A) each interest payment that, but for such redemption, would
     have been payable on the Security (or portion thereof) being redeemed on
     each Interest Payment Date occurring after the Redemption Date (excluding
     any accrued interest for the period prior to the Redemption Date); and

             (B) the principal amount that, but for such redemption, would
     have been payable at the final maturity of the Security (or portion
     thereof) being redeemed;

     over

        (ii) the principal amount of the Security (or portion thereof) being
     redeemed.

The present values of interest and principal payments referred to in clause (a)
above will be determined in accordance with generally accepted principles of
financial analysis.  Such present values will be calculated by discounting the
amount of each payment of interest or principal from the date that each such
payment would have been payable, but for the redemption, to the Redemption Date
at a discount rate equal to the Treasury Yield plus ____ basis points.  The
Make-Whole Premium shall be calculated by an Independent Investment Banker (as
defined in the Indenture).

     For purposes of determining the Make-Whole Premium, "Treasury Yield" means
a rate of interest per annum equal to the weekly average yield to maturity of
United States Treasury Notes that have a constant maturity that corresponds to
the remaining term to maturity of the Securities, calculated to the nearest
1/12th of a year (the "Remaining Term").  The Treasury Yield will be determined
as of the third Business Day immediately preceding the applicable Redemption
Date.  The weekly average yields of United States Treasury Notes will be
determined by reference to the most recent statistical release published by the
Federal Reserve Bank of New York and designated "H.15 (519) Selected Interest
Rates" or any successor release (the "H. I 5 Statistical Release").  If the H.15
Statistical Release sets forth a weekly average yield for United States Treasury
Notes having a constant maturity that is the same as the Remaining Term, then
the Treasury Yield will be equal to such weekly average yield.  In all other
cases, the Treasury Yield will be calculated by interpolation, on a straight-
line basis, between the weekly average yields on the United States Treasury
Notes that have a constant maturity closest to and greater than the Remaining
Term and the United States Treasury Notes that have a constant maturity closest
to and less than the Remaining Term (in each case as set forth in the H.15
Statistical Release).  Any weekly average yields so calculated by interpolation
will be rounded to the nearest 1/100th of 1%, with any figure of 1/200% or 


<PAGE>
 
above being rounded upward. If weekly average yields for United States Treasury
Notes are not available in the H.15 Statistical Release or otherwise, then the
Treasury Yield will be calculated by interpolation of comparable rates selected
by the Independent Investment Banker.

     Periodic interest installments with respect to which the Interest Payment
Date is on or prior to any Redemption Date will be payable to the Holders of
record at the close of business on the relevant record dates referred to herein,
all as provided in the Indenture.

     Notice of redemption will be mailed at least 30 days but not more than 60
days before the Redemption Date to each Holder of Securities to be redeemed at
his registered address.  Securities in denominations larger than $ 1,000 may be
redeemed in part but only in whole multiples of $1,000.  On and after the
Redemption Date interest will cease to accrue on Securities or on the portions
thereof called for redemption, as the case may be.

     7. Denominations, Transfer, Exchange. The Securities originally issued are
in the form of a permanent global security. Under certain circumstances
described in the Indenture, the Securities may also be issued in registered form
without coupons in denominations of $1,000 and integral multiples of $1,000. The
transfer of Securities may be registered and Securities may be exchanged as
provided in the Indenture. The Registrar and the Trustee may require a Holder,
among other things, to furnish appropriate endorsements and transfer documents
and to pay any taxes and fees required by law or permitted by the Indenture. The
Registrar need not exchange or register the transfer of any Security or portion
of a Security selected for redemption. Also, it need not exchange or register
the transfer of any Securities for a period of 15 days before a selection of
Securities to be redeemed.

     8. Persons Deemed Owners. The registered Holder of a Security shall be
treated as its owner for all purposes.

     9. Amendments and Waivers. Subject to certain exceptions and limitations,
the Indenture or the Securities may be amended or supplemented with the consent
of the Holders of at least a majority in principal amount of the then
outstanding Securities, and any existing Default under, or compliance with any
provision of, the Indenture may be waived (other than any continuing Default or
Event of Default in the payment of the principal of or premium, if any, or
interest on the Securities) by the Holders of at least a majority in principal
amount of the Securities then outstanding in accordance with the terms of the
Indenture. Without the consent of any Holder, the Company, and the Trustee may
amend or supplement the Indenture or the Securities to cure any ambiguity,
omission, defect or inconsistency; to provide for uncertificated Securities in
addition to or in place of certificated Securities; to provide for the
assumption of the obligations of the Company under the Indenture to Holders in
the case of the merger, consolidation or sale or other disposition of all or
substantially all of the assets of the Company ; to make any change that does
not materially adversely affect the rights of any Holder; or to comply with the
qualification of the Indenture under the Trust Indenture Act of 1939, as
amended.

<PAGE>
 
     The right of any Holder to participate in any consent required or sought
pursuant to any provision of the Indenture (and the obligation of the Company to
obtain any such consent otherwise required from such Holder) may be subject to
the requirement that such Holder shall have been the Holder of record of any
Securities with respect to which such consent is required or sought as of a date
identified by the Trustee in a notice furnished to Holders in accordance with
the terms of the Indenture.

     Without the consent of each Holder affected, the Company may not (i) reduce
the amount of Securities whose Holders must consent to an amendment, supplement
or waiver, (ii) reduce the rate of or change the time for payment of interest,
including default interest, on any Security, (iii) reduce the principal of or
change the fixed maturity of any Security or alter the premium or other
provisions with respect to redemption, (iv) make any Security payable in money
other than that stated in the Security, (v) impair the right to institute suit
for the enforcement of any payment of principal of, or premium, if any, or
interest on, any Security (except as provided in the Indenture), (vi) make any
change in the percentage of principal amount of Securities necessary to waive
compliance with certain provisions of the Indenture or (vii) waive a continuing
Default or Event of Default in the payment of principal of or premium, if any,
or interest on the Securities.

     10. Defaults and Remedies. Events of Default include: default in payment of
interest on the Securities for 30 days; default in payment of principal of or
premium, if any, on the Securities; failure by the Company for 60 days after
written notice by the Trustee or by the Holders of at least 25% of the aggregate
principal amount of the Securities then outstanding to it to comply with any of
its other covenants or agreements in the Indenture or the Securities; the
acceleration of the maturity of any Indebtedness of the Company or any
Restricted Subsidiary (other than the Securities) that has an outstanding
principal amount of $5 million or more individually or in the aggregate; a
default in the payment of principal or interest in respect of any Indebtedness
of the Company or any Restricted Subsidiary (other than the Securities) having
an outstanding principal amount of $5 million or more individually or in the
aggregate, and such default shall be continuing for a period of 30 days without
the Company or such Restricted Subsidiary, as the case may be, effecting a cure
of such default; failure by the Company or any Restricted Subsidiary to pay
final, non-appealable judgements aggregating in excess of $10 million, which
judgements are not paid, discharged or stayed for a period of 60 days; or
certain events involving bankruptcy, insolvency or reorganization of the Company
or any Restricted Subsidiary. If an Event of Default occurs and is continuing,
the Trustee or the Holders of at least 25% in principal amount of the then
outstanding Securities may declare the principal of, and premium, if any, and
interest on all the Securities to be immediately due and payable, except that in
the case of an Event of Default arising from certain events of bankruptcy,
insolvency or reorganization of the Company or any Restricted Subsidiary, all
outstanding Securities become due and payable immediately without further action
or notice. The amount due and payable upon the acceleration of any Security is
equal to 100% of the principal amount thereof plus accrued interest to the date
of payment. Holders may not enforce the Indenture or the Securities except as
provided in the Indenture. The Trustee may require indemnity satisfactory to it
before it enforces the Indenture or the Securities. Subject to certain
limitations, Holders of a majority in principal amount of the then outstanding
Securities may direct the Trustee in its exercise of any trust or power.
<PAGE>
 
The Trustee may withhold from Holders notice of any continuing default (except a
default in payment of principal or interest) if it determines that withholding
notice is in their interests. The Company must furnish an annual compliance
certificate to the Trustee.

     11. Trustee Dealings with Company. The Trustee, in its individual or any
other capacity, may make loans to, accept deposits from, and perform services
for the Company or its Affiliates, and may otherwise deal with the Company or
its Affiliates, as if it were not Trustee.

     12. No Recourse against Others. A director, officer, employee or
stockholder, as such, of the Company shall not have any liability for any
obligations of the Company under the Securities or the Indenture or for any
claim based on, in respect of or by reason of such obligations or their
creation. Each Holder by accepting a Security waives and releases all such
liability. The waiver and release are part of the consideration for the issuance
of the Securities.

     13. Authentication. This Security shall not be valid until authenticated by
the manual signature of the Trustee.

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

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


     Barrett Resources Corporation
     1515 Arapahoe Street, Tower 3, Suite 1000
     Denver, CO 80202
     Attention:  General Counsel

     
<PAGE>
 
                                ASSIGNMENT FORM

To assign this Security, fill in the form below: (I) or (we) assign and transfer
this Security to

________________________________________________________________________________
             (Insert assignee's social security or tax I.D. number)


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

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

________________________________________________________________________________
Date:  Your Signature:
       (Sign exactly as your name appears on the face of this Security)

________________________________________________________________________________
Signature Guarantee:
          (Participant in a Recognized Signature or Medallion Program)


<PAGE>
 
                                                                   Exhibit 10.1

                 FIRST AMENDMENT TO REVOLVING CREDIT AGREEMENT

       This FIRST AMENDMENT TO REVOLVING CREDIT AGREEMENT (this "First
                                                                 -----
Amendment") dated as of October 31, 1996 is made and entered into among BARRETT
- ---------
RESOURCES CORPORATION, a Delaware corporation ("Borrower"), the Banks (as
                                                --------
hereinafter defined), and TEXAS COMMERCE BANK NATIONAL ASSOCIATION, a national
banking association ("TCB") acting in its capacity as agent for the Banks (in
                      ---
such capacity, the "Agent").
                    -----

       WHEREAS, Borrower, the financial institutions party thereto (the "Banks")
                                                                         -----
and the Agent have heretofore entered into a Revolving Credit Agreement dated as
of July 19, 1995 (the "Credit Agreement") providing for, among other things,
                       ----------------
revolving credit loans to be made by the Banks to Borrower in a principal amount
not to exceed $200,000,000.00 in the aggregate at any time outstanding on the
terms and subject to the conditions therein set forth; and

       WHEREAS, the parties desire to amend the Credit Agreement in certain
respects;

       NOW, THEREFORE, in consideration of the premises and the mutual
agreements, representations and warranties herein set forth, and for other good
and valuable consideration, the parties hereto agree as follows:

       1.    Modification of Section 1.01. Section 1.01 of the Credit Agreement
             ----------------------------                                      
is hereby amended by changing the definition therein of "Maturity Date" to read
in its entirety as set forth below:

             "Maturity Date" shall mean October 31, 2000 or the earlier date of
       termination in whole of the Commitments or as extended pursuant to the
       provisions contained in Section 2.24 hereof."
                               ------------         

       2.    Representations and Warranties.  Borrower hereby represents and
             ------------------------------                                 
warrants that (a) the Borrower has the corporate power, authority and legal
right to execute and deliver this First Amendment and to perform the Credit
Agreement as amended through this First Amendment, and has taken all necessary
corporate action to authorize the execution and delivery of this First Amendment
and the performance of the Credit Agreement as amended through this First
Amendment, (b) this First Amendment has been duly executed and delivered on
behalf of Borrower, (c) the Credit Agreement as amended through this First
Amendment constitutes a valid and legally binding agreement enforceable against
Borrower in accordance with its terms, except as enforceability thereof may be
limited by bankruptcy, insolvency, reorganization, fraudulent transfer,
moratorium or other similar laws relating to creditors' rights generally and by
general principles of equity which may limit the right to obtain equitable
remedies (regardless of whether such enforceability is considered in a
proceeding in equity or at law), (d) the representations and warranties
contained in Article III of the Credit Agreement as amended through this First
Amendment are true and correct in all material respects on and as of the date
hereof as though made on and as of the date hereof (or, if stated to have been
made solely as of an earlier date, were true and correct as of such earlier
date) and (e) no Event of Default (as such term is defined in the Credit
Agreement) has occurred and is continuing.

       3.    Effectiveness.  This First Amendment shall become effective on the
             -------------                                                     
date when each of the following conditions shall have been fulfilled:

             (a)    this First Amendment shall have been duly executed and
       delivered by Borrower, the Banks and the Agent;
<PAGE>
 
             (b)    the Agent shall have received a certificate, in form and
       substance satisfactory to the Agent and dated as of the date hereof, from
       the Secretary or Assistant Secretary of Borrower as to (i) the election,
       incumbency and signatures of the officer(s) of the Borrower executing
       this First Amendment and (ii) no amendments, modifications, changes or
       alterations to, or revocation, repeal or supersession of, (x) its
       Certificate of Incorporation since July 19, 1995, and (y) its Bylaws
       since July 19,1995; and

             (c)    the Agent shall have received a Reaffirmation of Guaranty
       duly signed and delivered by each Subsidiary Guarantor, substantially in
       the form attached hereto as Exhibit A.

             (d)    the Borrower shall have executed and delivered, or caused to
       be executed and delivered, such other documents and instruments and taken
       such other actions as the Bank may reasonably request in connection with
       this First Amendment or the matters referred to herein.

       4.    Ratification.  Except as amended and modified through this First
             ------------                                                    
Amendment, the Credit Agreement shall continue in full force and effect.  The
Credit Agreement and this First Amendment shall be read, taken and construed as
one and the same instrument.

       5.    Counterparts.  This First Amendment may be signed in any number of
             ------------                                                      
counterparts, and by different parties on separate counterparts, each of which
shall be construed as an original, but all of which together shall constitute
one and the same instrument.

       6.    Certain Defined Terms.  Capitalized terms used herein without
             ---------------------                                        
definition shall have the meaning assigned to them in the Credit Agreement.  The
term "Credit Agreement" as defined and used in the other Loan Documents or any
other instrument, document or writing furnished to the Bank by Borrower in
connection with the Credit Agreement shall mean the Credit Agreement as amended
through this First Amendment.

       7.    GOVERNING LAW.  THIS FIRST AMENDMENT SHALL BE GOVERNED BY AND
             -------------                                                
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF TEXAS AND OF THE UNITED
STATES OF AMERICA TO THE EXTENT APPLICABLE.

       8.    FINAL AGREEMENT.    THE CREDIT AGREEMENT AS AMENDED THROUGH THIS
             ---------------
FIRST AMENDMENT AND THE OTHER LOAN DOCUMENTS CONSTITUTE A "LOAN AGREEMENT" AS
DEFINED IN SECTION 26.02(A) OF THE TEXAS BUSINESS AND COMMERCE CODE, AND
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 ORAL AGREEMENTS BETWEEN THE PARTIES.

                                      -2-
<PAGE>
 
       IN WITNESS WHEREOF, the parties have caused this First Amendment to be
executed and delivered as of the date first above written.


                                    BORROWER

                                    BARRETT RESOURCES CORPORATION

                                    By: /s/ Robert W. Howard
                                        -----------------------------------
                                    Name: Robert W. Howard
                                    Title: Senior Vice President-Finance &
                                           Treasurer

                                    AGENT

                                    TEXAS COMMERCE BANK
                                     NATIONAL ASSOCIATION,
                                    In its capacity as Agent for the Banks

                                    By: /s/ Lori H. Vetters
                                        -----------------------------------
                                    Name: Lori H. Vetters
                                    Title: Vice President


                                    BANKS

                                    TEXAS COMMERCE BANK
                                     NATIONAL ASSOCIATION

                                    By: /s/ Lori H. Vetters
                                        -----------------------------------
                                    Name: Lori H. Vetters
                                    Title: Vice President


                                    NATIONSBANK OF TEXAS, N.A.

                                    By: /s/ David C. Rubenking
                                        -----------------------------------
                                    Name: David C. Rubenking
                                    Title: Senior Vice President


                                    BANK OF MONTREAL, HOUSTON AGENCY

                                    By: /s/ Michael P. Stuckey
                                        -----------------------------------
                                    Name: Michael P. Stuckey
                                    Title: Managing Director, U.S. Corporate
                                           Banking

                                      -3-
<PAGE>
 
                                    THE FIRST NATIONAL BANK OF BOSTON

                                    By: /s/ H. Louis Bailey
                                        -------------------
                                    Name: H. Louis Bailey
                                    Title: Managing Director


                                    COLORADO NATIONAL BANK

                                    By: /s/ Charles S. Searle
                                        ---------------------
                                    Name: Charles S. Searle
                                    Title: Senior Vice President


                                    THE FIRST NATIONAL BANK OF CHICAGO

                                    (successor-in-interest to NBD Bank)

                                    By: /s/ William V. Clifford
                                        -----------------------
                                    Name: William V. Clifford
                                    Title: Vice President

                                      -4-

<PAGE>
 
                 SECOND AMENDMENT TO REVOLVING CREDIT AGREEMENT
     This SECOND AMENDMENT TO REVOLVING CREDIT AGREEMENT (this "Second
                                                                ------
Amendment") dated as of February 10, 1997 is made and entered into among BARRETT
- ---------
RESOURCES CORPORATION, a Delaware corporation ("Borrower"), the Banks (as
                                                --------                 
hereinafter defined), and TEXAS COMMERCE BANK NATIONAL ASSOCIATION, a national
banking association ("TCB") acting in its capacity as agent for the Banks (in
                      ---                                                    
such capacity, the "Agent").
                    -----   

     WHEREAS, Borrower, the financial institutions party thereto (the "Banks")
                                                                       -----  
and the Agent have heretofore entered into a Revolving Credit Agreement dated as
of July 19, 1995 (the "Credit Agreement") providing for, among other things,
                       ----------------                                     
revolving credit loans to be made by the Banks to Borrower in a principal amount
not to exceed $200,000,000.00 in the aggregate at any time outstanding on the
terms and subject to the conditions therein set forth; and

     WHEREAS, the parties desire to amend the Credit Agreement in certain
respects;

     NOW, THEREFORE, in consideration of the premises and the mutual agreements,
representations and warranties herein set forth, and for other good and valuable
consideration, the parties hereto agree as follows:

     1.  MODIFICATION OF SECTION 1.01.
         ---------------------------- 

     1.1  Section 1.01 of the Credit Agreement is hereby amended by adding the
following new definition of "Effective Date of Second Amendment" immediately
after the definition of "Effective Date":

          " "Effective Date of Second Amendment" shall have the same meaning
             ----------------------------------                             
     given to the term "Effective Date" in the Second Amendment."

     1.2  Section 1.01 of the Credit Agreement is hereby further amended by
deleting the phrase "Subsidiary Guaranty" appearing in the first line of the
definition therein of "Loan Documents".

     1.3. Section 1.01 of the Credit Agreement is hereby further amended by
adding the following new definition of "Public Indenture" immediately after the
definition of "Proved Undeveloped Hydrocarbon Reserves":

          " "Public Indenture" means the Indenture, dated as of February ____,
             ----------------                                                 
     1997, entered into between Borrower and Bankers Trust Company, as Trustee."

     1.4. Section 1.01 of the Credit Agreement is hereby further amended by
adding the following new definition of "Restricted Subsidiaries" immediately
after the definition of "Responsible Officer":

          " "Restricted Subsidiaries" means Plains and Plains Operating."
             -----------------------                                     

     1.5. Section 1.01 of the Credit Agreement is hereby further amended by
adding the following new definition of "Second Amendment" immediately after the
definition of "S&P":

          " "Second Amendment" means that certain Second Amendment to Revolving
             ----------------                                                  
     Credit Agreement dated as of February 10, 1997 among Borrower, the Agent
     and each of the Banks."

     1.6. Section 1.01 of the Credit Agreement is hereby further amended by
deleting the definition
<PAGE>
 
therein of "Subsidiary Guaranty" in its entirety.

     2.   MODIFICATION OF SECTION 3.01.  Subsection 3.01(a)(i)(bb) of the Credit
          ----------------------------                                          
Agreement is hereby amended by replacing the phrase "; and"  contained therein
with a ".", and by deleting Subsection 3.01(a)(a)(cc) in its entirety.

     3.   MODIFICATION OF SECTION 4.16.  Section 4.16 of the Credit Agreement is
          ----------------------------                                          
hereby amended to read in its entirety as follows:

          "SECTION 4.16.  Subsidiaries.  As of the Effective Date of the Second
                          ------------                                         
     Amendment, Schedule 4.16 contains a complete and accurate (a) list of all
                -------------                                                 
     Subsidiaries of Borrower, (b) description of the issued and outstanding
     capital stock of each Subsidiary of Borrower and (c) the record owners of
     such capital stock.

     4.   MODIFICATION OF SECTION 5.11.  Section 5.11 of the Credit Agreement is
          ----------------------------                                          
hereby amended to read in its entirety as follows:

          "SECTION 5.11.  Consolidation of Assets. On or before February 10,
                          -----------------------                           
     1998, Borrower shall, in an orderly fashion, merge or consolidate with, or
     acquire substantially all of the assets of, each of the Subsidiaries listed
     in Paragraph 1 of Schedule 4.16 unless, in the good faith judgment of
                       -------------                                      
     Required Banks, such merger or consolidation is prevented by material legal
     or accounting issues or will result in a material and adverse tax or
     economic detriment to Borrower and its Subsidiaries, and Borrower shall not
     thereafter reconvey, contribute or distribute such assets to any Subsidiary
     without the prior written consent of Required Banks.

     5.   ADDITION OF NEW SECTION 5.13.  The Credit Agreement is hereby amended
          ----------------------------                                         
by adding the following Section 5.13 immediately after Section 5.12:

          "SECTION 5.13.  Equal Security for Loans and Notes.  If any of
                          ----------------------------------            
     Borrower or any of its Subsidiaries shall create, incur, assume, or suffer
     to exist any Lien (other than Liens excepted by the provisions of Section
                                                                       -------
     6.03) upon any of its assets or property, whether now owned or hereafter
     ----                                                                    
     acquired, (unless prior written consent to the creation or assumption
     thereof shall have been obtained from the Required Banks), Borrower or such
     Subsidiary, as the case may be, shall make or cause to be made an effective
     provision whereby the Loans and other Obligations under this Agreement will
     be secured by such Lien equally and ratably with any and all other
     Indebtedness thereby secured as long as any such other Indebtedness shall
     be so secured; provided that this covenant shall not be construed as
                    --------                                             
     consent by the Banks to any violation by Borrower or its Subsidiaries of
                                                                             
     Section 6.03 and, provided, further, that Borrower and its Subsidiaries
     ------------      --------  -------                                    
     shall not agree with any other holder of its Indebtedness (except as
     provided in the Public Indenture) that it shall provide equal security for
     such Indebtedness."

     6.   MODIFICATION OF SECTION 6.01.
          ---------------------------- 

     6.1  Section 6.01 (b) of the Credit Agreement is hereby amended to read in
its entirety as set forth below:

          "(b)  Unsecured Indebtedness and Accommodation Obligations outstanding
     on the Effective Date of the Second Amendment hereof described in Schedule
                                                                       --------
     6.01, in each case in a
     ----                   

                                      -2-
<PAGE>
 
     principal amount at any one time outstanding not to exceed the amount set
     forth on Schedule 6.01 hereof;"
              -------------         

     6.2  Section 6.01 (g) of the Credit Agreement is hereby amended by adding
the parenthetical "(other than Restricted Subsidiaries)" after the word
"Subsidiaries" appearing in the second line thereof.

     6.3  Section 6.01 (h) of the Credit Agreement is hereby amended by adding
the parenthetical "(other than Restricted Subsidiaries)" after the word
"Subsidiaries" appearing in the second line thereof.

     6.4  Section 6.01 is hereby further amended by adding the following
sentence immediately after Subsection 6.01(h):

          "It is understood and agreed that Borrower shall not permit any of its
     Restricted Subsidiaries to create, incur, assume or otherwise become or
     remain liable with respect to, any Indebtedness or Accommodation
     Obligations, except for that incurred under subparagraphs (c), (d), (e),
     and (f) above."

     7.   MODIFICATION OF SECTION 6.02.  Section 6.02 of the Credit Agreement is
          ----------------------------                                          
hereby amended by deleting the phrase "provided such Subsidiary has duly
executed and delivered a Subsidiary Guaranty in favor of the Agent" from the
eighth and ninth lines thereof.

     8.   MODIFICATION OF SECTION 6.03.  Section 6.03 of the Credit Agreement is
          ----------------------------                                          
hereby amended by replacing the parenthetical "(other than this Credit
Agreement)" appearing in the fifth line thereof with the parenthetical "(other
than this Credit Agreement and the Public Indenture)".

     9.   MODIFICATION OF SECTION 6.05.  Subsection 6.05(d) of the Credit
          ----------------------------                                   
Agreement is hereby amended by deleting the phrase "provided such Subsidiaries
have executed and delivered a Subsidiary Guaranty in favor of the Agent"
therefrom.

     10.  MODIFICATION OF SECTION 6.07.  Section 6.07 of the Credit Agreement is
          ----------------------------                                          
hereby amended by adding the word "and" immediately before the parenthetical
"(ii)" appearing in the fourth line thereof and by deleting the subclause "or
(iii) a Subsidiary's ability to perform timely its material covenants and
obligations under any Subsidiary Guaranty to which it is a party" therefrom.

     11.  MODIFICATION OF SECTION 6.08.  Section 6.08 of the Credit Agreement is
          ----------------------------                                          
hereby amended by replacing the word "or" appearing in the sixth line thereof
with a "," and by adding the clause "or (iv) transfers and conveyances of assets
from the Subsidiaries of Borrower to the Borrower as provided for in 
Section 5.11 and permitted under Section 6.04."
- ------------                     ------------  

     12.  ADDITION OF NEW SECTION 6.16.  The Credit Agreement is hereby amended
          ----------------------------                                         
by adding the following Section 6.16 immediately after Section 6.15:

          "SECTION 6.16.  Subsidiaries. Borrower shall not acquire, create or
                          ------------                                       
     otherwise allow or permit any corporation, partnership or other Person to
     become a Subsidiary (other than those Subsidiaries set forth on Schedule
                                                                     --------
     4.16 and permitted to exist pursuant to Section 5.13 hereof) without, in
     ----                                    ------------                    
     each instance, the prior written consent of Required Banks."

     13.  MODIFICATION OF SECTION 7.01.
          ---------------------------- 

                                      -3-
<PAGE>
 
     13.1      Section 7.01(c) is hereby amended by adding the sections "5.11,
                                                                         -----
5.13  " immediately after the section "5.01(d)(ii)" contained therein.
- ----                                   -----------                    

     13.2 Section 7.01(d) is hereby amended by deleting the section "5.11"
                                                                     ---- 
therefrom.

     13.3 Section 7.01(f) is hereby amended to read in its entirety as follows:

          "(f)  [Intentionally deleted]"

     13.4 Section 7.01(i) is hereby amended by replacing the phrase
"$15,000,000" contained in the second line thereof with the phrase "$5,000,000".

     13.5 Section 7.01(m) is hereby amended by replacing the phrase
"$15,000,000" contained in the first line thereof with the phrase "$10,000,000".

     14.  MODIFICATION OF SECTION 9.01.  Section 9.01 of the Credit Agreement is
          ----------------------------                                          
hereby amended by adding the word "or" after the semicolon in subclause (vi)
thereof, and by replacing the phrase "; or" at the end of subclause (vii)
thereof with a ".", and by deleting in its entirety subclause (viii) therefrom.

     15.  MODIFICATION OF SECTION 9.10(b).  Section 9.10(b) of the Credit
          -------------------------------                                
Agreement is hereby amended by deleting the phrase "or the release of any
Subsidiary under the Subsidiary Guaranty" from the sixteenth and seventeenth
lines thereof.

     16.  MODIFICATION OF SCHEDULE 4.16.  Schedule 4.16 of the Credit Agreement
          -----------------------------                                        
is hereby amended to read in its entirety as set forth in Annex A attached
                                                          -------         
hereto and made a part hereof by reference for all purposes.

     17.  MODIFICATION OF SCHEDULE 4.19.  Schedule 4.19 of the Credit Agreement
          -----------------------------                                        
is hereby amended to read in its entirety as set forth in Annex B attached
                                                          -------         
hereto and made a part hereof by reference for all purposes.

     18.  MODIFICATION OF SCHEDULE 6.01.  Schedule 6.01 of the Credit Agreement
          -----------------------------                                        
is hereby amended to read in its entirety as set forth in Annex C attached
                                                          -------         
hereto and made a part hereof by reference for all purposes.

     19.  DELETION OF EXHIBIT 5.11.  Exhibit 5.11 of the Credit Agreement is
          ------------------------                                          
hereby deleted in its entirety.

     20.  BORROWING BASE.  During the period from the Effective Date of the
          --------------                                                   
Second Amendment until May 1, 1997 (the next Redetermination Date), the
Borrowing Base shall be $75,000,000.

     21.  REPRESENTATIONS AND WARRANTIES.  Borrower hereby represents and
          ------------------------------                                 
warrants that (a) the Borrower has the corporate power, authority and legal
right to execute and deliver this Second Amendment and to perform the Credit
Agreement as amended through this Second Amendment, and has taken all necessary
corporate action to authorize the execution and delivery of this Second
Amendment and the performance of the Credit Agreement as amended through this
Second Amendment, (b) this Second Amendment has been duly executed and delivered
on behalf of Borrower, (c) the Credit Agreement as amended through this Second
Amendment constitutes a valid and legally binding agreement enforceable 

                                      -4-
<PAGE>
 
against Borrower in accordance with its terms, except as enforceability thereof
may be limited by bankruptcy, insolvency, reorganization, fraudulent transfer,
moratorium or other similar laws relating to creditors' rights generally and by
general principles of equity which may limit the right to obtain equitable
remedies (regardless of whether such enforceability is considered in a
proceeding in equity or at law), (d) the representations and warranties
contained in Article IV of the Credit Agreement as amended through this Second
Amendment are true and correct in all material respects on and as of the date
hereof as though made on and as of the date hereof (or, if stated to have been
made solely as of an earlier date, were true and correct as of such earlier
date) and (e) no Event of Default (as such term is defined in the Credit
Agreement) has occurred and is continuing.

     22.    EFFECTIVENESS.  This Second Amendment shall become effective on the
            -------------                                                      
date when each of the following conditions shall have been fulfilled:

     22.1.  Borrower and each Bank shall have duly executed a counterpart of
this Second Amendment and delivered same to the Agent, or, in the case of any
Bank as to which an executed counterpart hereof shall not have been so
delivered, the Agent shall have received written confirmation by telecopy or
other similar writing from such Bank of execution of a counterpart hereof by
such Bank.

     22.2.  The Agent shall have received the favorable written legal opinion
of Bearman Talesnick & Clowdus Professional Corporation, legal counsel to the
Borrower, dated as of the date hereof, and in form and substance satisfactory to
the Agent;

     22.3   The Indenture dated as of February ____, 1997, entered into between
Borrower and Bankers Trust Company, as Trustee, shall have been duly executed
and delivered contemporaneously with the execution and delivery of this Second
Amendment and Borrower shall have issued its ___ % Senior Notes due 2007.

     22.4.  The Agent shall have received a certificate, in form and
substance satisfactory to the Agent and dated as of the date hereof, from the
Secretary or Assistant Secretary of Borrower as to (i) the election, incumbency
and signatures of the officer(s) of the Borrower executing this Second
Amendment, (ii) the resolutions (attaching a true and correct copy of same) of
the Executive Committee of Borrower authorizing the execution, delivery and
performance of the Credit Agreement as amended through this Second Amendment,
(iii) no amendments, modifications, changes or alterations to, or revocation,
repeal or supersession of, (x) its Certificate of Incorporation since July 19,
1995, and (y) its Bylaws since July 19, 1995; and (iv) the execution, delivery
and effectiveness of the Indenture, dated as of February ____, 1997, entered
into between Barrett and Bankers Trust Company, as Trustee.

     22.5.  Borrower shall have executed and delivered, or caused to be
executed and delivered, to the Agent such other documents and instruments and
taken such other actions as the Banks may reasonably request in connection with
this Second Amendment or the matters referred to herein.

     23.    EXPENSES. Whether or not this Second Amendment shall become 
            --------
effective as provided in paragraph 22 above and whether or not the transactions
contemplated hereby shall be consummated, Borrower agrees to pay on demand any
and all expenses incurred by the Agent (including, without limitation,
reasonable fees and disbursements of counsel for the Agent) in connection with
or relating to the execution and delivery of this Second Amendment.

     24.    MISCELLANEOUS PROVISIONS.
            ------------------------ 

                                      -5-
<PAGE>
 
     24.1.     Except as amended and modified through this Second Amendment, the
Credit Agreement shall continue in full force and effect.  The Credit Agreement
and this Second Amendment shall be read, taken and construed as one and the same
instrument.

     24.2.     This Second Amendment may be signed in any number of
counterparts, and by different parties on separate counterparts, each of which
shall be construed as an original, but all of which together shall constitute
one and the same instrument.

     24.3.     Capitalized terms used herein without definition shall have the
meaning assigned to them in the Credit Agreement.  The term "Credit Agreement"
as defined and used in the other Loan Documents or any other instrument,
document or writing furnished to the Bank by Borrower in connection with the
Credit Agreement shall mean the Credit Agreement as amended through this Second
Amendment.

     24.4.     THIS SECOND AMENDMENT SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF TEXAS AND OF THE UNITED STATES OF
AMERICA TO THE EXTENT APPLICABLE.

     24.5.     THE CREDIT AGREEMENT AS AMENDED THROUGH THIS SECOND AMENDMENT AND
THE OTHER LOAN DOCUMENTS CONSTITUTE A "LOAN AGREEMENT" AS DEFINED IN SECTION
26.02(A) OF THE TEXAS BUSINESS AND COMMERCE CODE, AND 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 ORAL
AGREEMENTS BETWEEN THE PARTIES.

                                      -6-
<PAGE>
 
     IN WITNESS WHEREOF, the parties have caused this Second Amendment to be
executed and delivered as of the date first above written.


                                    BORROWER

                                    BARRETT RESOURCES CORPORATION

                                    By: /s/ Robert W. Howard
                                       ---------------------------------------  
                                    Name: Robert W. Howard
                                         ------------------------------------- 
                                    Title: Senior Vice President and Treasurer
                                          ------------------------------------


                                    AGENT

                                    TEXAS COMMERCE BANK
                                      NATIONAL ASSOCIATION,
                                    In its capacity as Agent for the Banks

                                    By: /s/ Lori Vetter
                                       ----------------------------------------
                                    Name: Lori Vetters
                                         --------------------------------------
                                    Title: V.P.
                                          -------------------------------------



                                    BANKS

                                    TEXAS COMMERCE BANK
                                      NATIONAL ASSOCIATION

                                    By: /s/ Lori Vetters
                                       ----------------------------------------
                                    Name: Lori Vetters
                                         --------------------------------------
                                    Title: V.P.
                                          -------------------------------------


                                    NATIONSBANK OF TEXAS, N.A.

                                    By: /s/ David C. Rubenking
                                       ----------------------------------------
                                    Name: David C. Rubenking
                                         --------------------------------------
                                    Title: S.V.P.
                                          -------------------------------------


                                    BANK OF MONTREAL, HOUSTON AGENCY

                                    By: /s/ Robert Roberts
                                       ----------------------------------------
                                    Name: Robert L. Roberts
                                         --------------------------------------
                                    Title: Director, U.S. Corporate Banking
                                          -------------------------------------

                                      -7-
<PAGE>
 
                                    THE FIRST NATIONAL BANK OF BOSTON

                                    By: /s/ Ann E. Howard
                                       ----------------------------------------
                                    Name: Ann E. Howard
                                         --------------------------------------
                                    Title: Division Executive
                                          -------------------------------------



                                    COLORADO NATIONAL BANK

                                    By: /s/ Mark E. Thompson
                                       ----------------------------------------
                                    Name: Mark E. Thompson
                                         --------------------------------------
                                    Title: Vice President
                                          -------------------------------------


                                    THE FIRST NATIONAL BANK OF CHICAGO

                                    By: /s/ Carl E. Skoog
                                       ----------------------------------------
                                    Name: Carl E. Skoog
                                         --------------------------------------
                                    Title: Authorized Agent
                                          -------------------------------------


GW09:72814.06/110864-19/1187

                                      -8-
<PAGE>
 
                                   ANNEX A TO
                                SECOND AMENDMENT

                                                                   SCHEDULE 4.16

                                  Subsidiaries

     1. Names of the existing Subsidiaries of Borrower that are to be merged
        into or consolidated with Borrower in compliance with the provisions of
        Section 5.11 of the Credit Agreement:
<TABLE>
<CAPTION>
 
                                       Jurisdiction or  Percentage   Ownership
Name                                   Organization     Ownership    Type
<S>                                       <C>           <C>         <C>
 
Plains Petroleum Company                  Delaware         100%     Direct
 
Plains Petroleum Operating Company        Delaware         100%     Indirect
 
Barrett Resources (PAC I)
 Corporation(f/k/a 4-D Energy, Inc.)      Kansas           100%     Direct
 
Barrett Resources (PAC II) Corporation
 (f/k/a Quasar Energy, Inc.)              Kansas           100%     Direct
 
Alarado Corporation***                    Delaware         100%     Direct
 
Barrett Fuels Corporation                 Delaware         100%     Direct
 
BGP Inc.                                  Delaware         100%     Direct
 
</TABLE>
     2. Names of the existing Subsidiaries that will remain wholly-owned
     Subsidiaries after February 10, 1998:
<TABLE>
<CAPTION>
 
                                       Jurisdiction or  Percentage   Ownership
Name                                   Organization     Ownership    Type
<S>                                    <C>              <C>          <C>
 
Plains Petroleum Gathering Company*    Delaware             100%     Indirect
 
Bargath, Inc.*                         Colorado             100%     Direct

Alarado (Denver) Company*              Colorado             100%     Indirect
 
Barrett Resources International
 Corporation**                         Delaware             100%     Direct
 
Barrett Resources (Peru)
 Corporation*                          Delaware             100%     Indirect
</TABLE>

                                      -9-
<PAGE>
 
Barrett Resources (Peru)
 Corporation Sucursal del Peru           Peru Branch


* Plains Petroleum Gathering Company and Bargath Inc. own gas gathering and
pipeline assets; Alarado (Denver) Company will be merged into Bargath, Inc.;
Bargath, Inc. is a venture partner in the Grand Valley Gathering System JV and
Trailridge Gathering System JV

** Barrett Resources International Corporation and Barrett Resources (Peru)
Corporation exist for tax purposes to conduct foreign operations

***Alarado Corporation's name will be changed to Barrett Resources (PAC III)
Corporation prior to its merger into or consolidation with Borrower

                                      -10-
<PAGE>
 
                                   ANNEX B TO
                                SECOND AMENDMENT

                                                                   SCHEDULE 4.19

                               Material Contracts

     1. Indenture dated as of February ____, 1997 between Borrower and Bankers
        Trust Company, as Trustee concerning the issuance of ___% Senior Notes
        due 2007 in the aggregate principal sum of $150,000,000.

     2. No other Material Contracts exist as defined in the Revolving Credit
        Agreement other than of the type specifically excluded in Section 4.19
        of the Revolving Credit Agreement. 

                                      -11-
<PAGE>
 
                                   ANNEX C TO
                                SECOND AMENDMENT

                                                                   SCHEDULE 6.01

                             EXISTING INDEBTEDNESS

     1.   As of March 31, 1995 Plains had a liability of $952,000 for its post
retirement benefit plans and a liability of $1,023,000 principally for its
deferred compensation plans.

     2.   Indebtedness evidenced by the Senior Notes issued by Borrower pursuant
to the Public Indenture; provided, that the aggregate outstanding principal
                         --------                                          
amount of the Indebtedness thereunder shall not exceed $150,000,000. As use
herein, the term "Senior Notes" means the ___ % Senior Notes due 2007 issued by
Barrett Resources Corporation, a Delaware corporation, pursuant to the Public
Indenture.

                                      -12-

<PAGE>
 
                                                                    Exhibit 23.1

                         CONSENT OF ARTHUR ANDERSEN LLP



     As independent public accountants, we hereby consent to the use of our
reports (and to all references to our Firm) included in or made of part of this
Registration Statement.




                                               /s/ ARTHUR ANDERSEN LLP



Denver, Colorado
    
February 10, 1997      

<PAGE>
 
                                                                    Exhibit 23.3


                        CONSENT OF RYDER SCOTT COMPANY
    
        We hereby consent to the references to Ryder Scott Company Petroleum 
Engineers as experts in the field of petroleum engineering in the Registration 
Statement (Form S-3) and related prospectus of Barrett Resources Corporation 
dated February 10, 1997 and to all references to our Firm included in this 
Registration Statement.      

                                    Very truly yours,


                                    /s/ RYDER SCOTT COMPANY PETROLEUM ENGINEERS
                                    -------------------------------------------
                                    RYDER SCOTT COMPANY 
                                    PETROLEUM ENGINEERS
    
Dated:  February 10, 1997      
        Denver, Colorado 



<PAGE>
 
                                                                    Exhibit 23.4
 
           CONSENT OF INDEPENDENT PETROLEUM ENGINEERS AND GEOLOGISTS
    
  We hereby consent to the references to Netherland, Sewell & Associates, Inc.
as experts in the field of petroleum engineering in the Registration Statement
(Form S-3) and related prospectus of Barrett Resources Corporation dated
February 10, 1997 and to all references to our Firm included in this
Registration Statement.     

                              Netherland, Sewell & Associates, Inc.
                               
                              By:  /s/ Frederic D. Sewell 
                                 ------------------------
                                   Frederic D. Sewell
                                   President

Dallas, Texas   
    
February 10, 1997      

<PAGE>
 
                                                                    EXHIBIT 99.3


                                  February 6, 1997



Barrett Resources Corporation
1515 Arapahoe Street
Tower 3, Suite 1000
Denver, Colorado 80202

Gentlemen:

        Pursuant to your request, we have reviewed your estimates of the net
proved reserves attributable to the interests of Barrett Resources Corporation
(referred to herein as the "Company") as of December 31, 1996.  This review
consisted of approximately 2500 wells, and reserves attributed to certain behind
pipe zones and undeveloped locations, which were evaluated by the reservoir
engineering staff of Barrett Resources Corporation.  The subject properties are
located in the States of Arkansas, Colorado, Kansas, Louisiana, Montana, New
Mexico, Nevada, North Dakota, Oklahoma, Texas, Utah and Wyoming and the federal
waters offshore Louisiana..  Based on your reserve estimates, the proved net
reserves as of December 31, 1996 are presented below.
<TABLE>
<CAPTION>
 
                                Reviewed

                           Proved Net Reserves

                PREPARED BY BARRETT RESOURCES CORPORATION

                         As of December 31, 1996
                -----------------------------------------
                 LIQUID, MBBLS                GAS, MMCF
                --------------                -----------           
<S>             <C>                           <C>
Developed           15,773                      511,645
Undeveloped          7,458                      163,248
                    ------                      -------
Total Proved        23,231                      674,893
</TABLE>

        In general, it is our opinion that the methods and techniques used in
preparing your report are in accordance with generally accepted procedures for
the determination of reserves. Further, in our judgement, there was no evidence
of bias in the application of the methods and techniques for estimating proved
reserves, and that the total proved net reserves estimated would be within 10
percent of those estimated by Ryder Scott Company.  However, on a well by well
comparison, differences of greater than 10 percent may exist.

        Total proved developed reserves in the Grand Valley-Rulison Field Area,
Garfield County, Colorado and the North Waltman Area in Natrona County, Wyoming
have established significant proved undeveloped reserves.  Because of the direct
relationship between quantities of proved undeveloped reserves and development
plans, we have included in the proved undeveloped category only reserves
assigned to undeveloped locations that we have been assured will definitely be
drilled.  As with all
<PAGE>
 
Barrett Resources Corporation
February 6, 1997
Page 2


reserves estimates, future development and performance data, as well as changes
in the market prices of oil, condensate and gas may necessitate significant
revisions in the estimates of reserves prepared at a future date for these wells
and undeveloped locations.

        The proved reserves presented in your report comply with the Securities
and Exchange Commission's Regulation S-X Part 210.4-10(a) as clarified by the
Commission's Staff Accounting Bulletin No. 40, and are based on the following
definitions and criteria:

               Proved reserves of crude oil, condensate, natural gas, or natural
               ---------------
     gas liquids are estimated quantities that geological and engineering data
     demonstrate with reasonable certainty to be recoverable in the future from
     known reservoirs under existing conditions.  Reservoirs are considered
     proved if economic producibility is supported by actual production or
     formation tests.  In certain instances, proved reserves may be assigned on
     the basis of a combination of core analysis and electrical and other type
     logs which indicate the reservoirs are analogous to reservoirs in the same
     field which are producing or have demonstrated the ability to produce on a
     formation test.  The area of a reservoir considered proved includes (1)
     that portion delineated by drilling and defined by fluid contacts, if any,
     and (2) the adjoining portions not yet drilled that can be reasonably
     judged as economically productive on the basis of available geological and
     engineering data.  In the absence of data on fluid contacts, the lowest
     known structural occurrence of hydrocarbons controls the lower proved limit
     of the reservoir.  Proved reserves are estimates of hydrocarbons to be
     recovered from a given date forward.  They may be revised as hydrocarbons
     are produced and additional data become available.  Proved natural gas
     reserves consist of non-associated, associated and dissolved gas.  An
     appropriate reduction in gas reserves has been made for the expected
     removal of natural gas liquids, for lease and plant fuel, and for the
     exclusion of non-hydrocarbon gases if they occur in significant quantities
     and are removed prior to sale.  Reserves that can be produced economically
     through the application of established improved recovery techniques are
     included in the proved classification when these qualifications are met:
     (1) successful testing by a pilot project or the operation of an installed
     program in that reservoir or one in the immediate area with similar rock
     and fluid properties provides support for the engineering analysis on which
     the project or program was based, and (2) it is reasonably certain the
     project will proceed.  Reserves to be recovered by improved recovery
     techniques that have yet to be established through repeated economically
     successful applications are included in the proved category only after
     successful testing by a pilot project or after the operation of an
     installed program in the reservoir provides support for the engineering
     analysis on which the project or program was based.  Improved recovery
     includes all methods for supplementing natural reservoir forces and energy,
     or otherwise increasing ultimate recovery from a reservoir, including (1)
     pressure maintenance, (2) cycling, and (3) secondary recovery in its
     original sense.  Improved recovery also includes the enhanced recovery
     methods of thermal, chemical flooding, and the use
<PAGE>
 
Barrett Resources Corporation
February 6, 1997
Page 3


of miscible and immiscible displacement fluids.  Estimates of proved reserves do
not include crude oil, condensate, natural gas, or natural gas liquids being
held in underground storage.  Depending on the status of development, these
proved reserves are further subdivided into:

        (i) "developed reserves" which are those proved reserves reasonably
        expected to be recovered through existing wells with existing equipment
        and operating methods, including (a) "developed producing reserves"
        which are those proved developed reserves reasonably expected to be
        produced from existing completion intervals now open for production in
        existing wells, and (b) "developed non-producing reserves" which are
        those proved developed reserves which exist behind the casing of
        existing wells which are reasonably expected to be produced through
        these wells in the predictable future where the cost of making such
        hydrocarbons available for production should be relatively small
        compared to the cost of a new well; and

        (ii) "undeveloped reserves" which are those proved reserves reasonably
        expected to be recovered from new wells on undrilled acreage, from
        existing wells where a relatively large expenditure is required and from
        acreage for which an application of fluid injection or other improved
        recovery technique is contemplated where the technique has been proved
        effective by actual tests in the area in the same reservoir or one with
        similar rock and fluid properties.  Reserves from undrilled acreage are
        limited to those drilling units offsetting productive units that are
        reasonably certain of production when drilled.  Proved reserves for
        other undrilled units are included only where it can be demonstrated
        with reasonable certainty that there is continuity of production from
        the existing productive formation.

        The Company has interests in certain tracts which have substantial
additional hydrocarbon quantities which cannot be classified as proved and
consequently are not included herein.  The Company has active exploratory and
development drilling programs which in all likelihood will result in the
reclassification of significant additional quantities to the proved category.

        Our reserve estimates are based upon a detailed study of the properties
in which the Company has interests; however, we have not made any field
examination of the properties.  The Company informed us that it has furnished us
all of the accounts, records, production data, geological and engineering data
and reports and other data as were required for our investigation.  The
ownership interests, prices, lease operating and developing costs, and other
factual data furnished to us in connection with our investigation were accepted
as represented.
<PAGE>
 
Barrett Resources Corporation
February 6, 1997
Page 4


        Neither Ryder Scott Company nor any of its employees has any interest in
the subject properties and neither the employment to make this study nor the
compensation is contingent on our estimates of reserves and future cash inflows
for the subject properties.

                                  Very truly yours,

                                  RYDER SCOTT COMPANY
                                  PETROLEUM ENGINEERS

                                  /s/ Gary Krieger

                                  Gary Krieger, P. E.
                                  Vice President

GK:ph
                                  [Professional Engineer's Seal appears here]


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