1


                                                                     EXHIBIT 2.2


[THIS AGREEMENT HAS CONFIDENTIAL PORTIONS OMITTED, WHICH PORTIONS HAVE BEEN
FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. OMITTED PORTIONS
ARE INDICATED IN THIS AGREEMENT WITH "[TEXT OMITTED - CONFIDENTIAL TREATMENT
REQUESTED]."









                           PURCHASE AND SALE AGREEMENT


                                 BY AND BETWEEN



                           FOUR STAR OIL & GAS COMPANY


                                       AND


                           BARGO PETROLEUM CORPORATION





                            DATED: FEBRUARY 22, 2000

                         EFFECTIVE DATE: JANUARY 1, 2000









   2


                                TABLE OF CONTENTS



                                                                                                             
PART ONE
   SUBJECT MATTER, DEFINITIONS AND RULES OF CONSTRUCTION..........................................................1
     1.1     Subject Matter ......................................................................................1
     1.2     Defined Terms .......................................................................................1
        Affiliate.................................................................................................1
        Agreed Rate...............................................................................................1
        Agreement.................................................................................................2
        Applicable Law............................................................................................2
        Assets....................................................................................................2
        Assumed Obligations.......................................................................................2
        Beneficial Interests......................................................................................2
        Burdens...................................................................................................2
        Business Day..............................................................................................2
        Closing...................................................................................................2
        Closing Date..............................................................................................2
        Code......................................................................................................3
        [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
        Contemplated Transactions.................................................................................3
        Contracts.................................................................................................3
        Corporate Documents.......................................................................................3
        Easements.................................................................................................3
        [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
        [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
        [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
        Excluded Assets...........................................................................................4
        Excluded Obligations......................................................................................6
        Fee Interests.............................................................................................6
        Governmental Body.........................................................................................6
        HSR Act...................................................................................................6
        Hydrocarbons..............................................................................................6
        Knowledge.................................................................................................6
        Leases....................................................................................................6
        Losses....................................................................................................7
        [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
        [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
        Other Property............................................................................................7
        Permitted Encumbrances....................................................................................8
        Person....................................................................................................9
        [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
        Properties...............................................................................................10
        Taxes....................................................................................................10
        TEPI.....................................................................................................10
        TEPI PSA.................................................................................................10
        [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
     1.3     Other Definitions in the Agreement .................................................................11
     1.4     Rules of Construction ..............................................................................12



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                                        i


   3



                                                                                                             
PART TWO

   SALE AND PURCHASE.............................................................................................13
     2.1     Purchase and Sale ..................................................................................13
     [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
     [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
     [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
     2.5     Closing and Payment of Purchase Price ..............................................................14
     2.6     Method of Payment ..................................................................................14

PART THREE

   REPRESENTATIONS AND WARRANTIES................................................................................14
     3.1     Seller .............................................................................................14
     3.2     Buyer ..............................................................................................17
     3.3     Disclaimer and Notifications .......................................................................18

PART FOUR

   COVENANTS.....................................................................................................21
     4.1     Covenants of Seller ................................................................................21
     4.2     Covenants of Buyer .................................................................................22
     4.3     Covenants of Seller and Buyer ......................................................................24

PART FIVE

   CONDITIONS TO CLOSING.........................................................................................33
     5.1     Seller's Closing Conditions ........................................................................33
     5.2     Buyer's Closing Conditions .........................................................................35
        [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]


PART SIX

        [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
        [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]


PART SEVEN

   TAXES.........................................................................................................38
     7.1     Payment and Apportionment of Real Property Taxes and Personal Property Taxes .......................38
     7.2     Other Taxes ........................................................................................39
     7.3     Sales Taxes ........................................................................................39
     7.4     Cooperation ........................................................................................39
     7.5     Tax Proceedings ....................................................................................39
     7.6     Purchase Price Allocation ..........................................................................39
     7.7     Reservation of Section 29 Credits ..................................................................39
     7.8     Reservation of Section 43 Credits ..................................................................40

PART EIGHT

        [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
        [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
        [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
        [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
        [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]



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                                       ii


   4



                                                                                                             
        [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
        [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]

PART NINE

   MISCELLANEOUS.................................................................................................43
     9.1     Successors and Assigns .............................................................................43
     9.2     Waivers and Amendments .............................................................................43
     9.3     Notices ............................................................................................44
     9.4     Counterparts .......................................................................................44
     9.5     Entire Agreement ...................................................................................44
     9.6     Seller's Option to Elect a Tax Deferred Exchange ...................................................45
     9.7     Severability .......................................................................................45
     9.8     Applicable Law .....................................................................................45
     9.9     Expenses ...........................................................................................45
     9.10    Laws and Regulations ...............................................................................45
     9.11    Public Announcements ...............................................................................45
     9.12    Assignability ......................................................................................45
     9.13    Provisions Survive Closing .........................................................................46
     9.14    Dispute Resolution .................................................................................46
        [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]



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                                      iii
   5


     SCHEDULES AND EXHIBITS

SCHEDULES

      A           Contracts
      B           Easements
      C           Included Equipment
      D           Excluded Assets
      E           Leases
      F           Fee Interests
      G           Properties and Imbalances
      2.4         Purchase Price Allocation
      3.1(g)      Litigation
      3.1(h)      Consents and Preferential Rights
      3.1(j)      Permits
      3.1(k)      Notices on Leases and Contract
   [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
      3.1(n)      AFE's
      4.3(d)      Gas Purchase Agreements to be Executed
      4.3(v)      Joint Use Agreements
      4.3(w)      Centrilift Equipment
      9.14        Dispute Resolution

EXHIBITS

      A                             Assignments
      B-1 through B-2               Deeds
      C                             Oil and Gas Leases
      D                             Officer's Certificate-Buyer
      E                             Officer's Certificate-Seller
      F                             [intentionally left blank]
      G                             [intentionally left blank]
      H                             [intentionally left blank]
      I                             [intentionally left blank]
      J                             [intentionally left blank]
      K                             Versado Gas Purchase Agreement
      L                             Geophysical License Agreement (2D)


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                                       iv
   6


                           PURCHASE AND SALE AGREEMENT


     This agreement is made and entered into this 22nd day of February, 2000, by
and between Four Star Oil & Gas Company, a Delaware corporation (hereinafter
"Seller"), and Bargo Petroleum Corporation, a Texas corporation, (hereinafter
"Buyer"). Seller and Buyer are sometimes separately referred to herein as a
"Party" and collectively as "Parties."


                                    PART ONE

              SUBJECT MATTER, DEFINITIONS AND RULES OF CONSTRUCTION

     1.1 SUBJECT MATTER. The subject matter of this Agreement is the sale by
Seller to Buyer of the Assets, the purchase of the Assets and the assumption of
the Assumed Obligations by Buyer, and the terms and conditions upon which all of
the foregoing shall take place.

     1.2 DEFINED TERMS. For purposes of this Agreement, including the Exhibits
and Schedules hereto, except as otherwise expressly provided or unless the
context otherwise requires, the terms defined in this Section 1.2 have the
meanings assigned to them herein and the capitalized terms defined elsewhere in
the Agreement by inclusion in quotation marks and parentheses have the meanings
so ascribed to them.

          "AFFILIATE" means, with respect to any Person, any other Person
     directly or indirectly controlling or controlled by, or under common
     control with, such Person. For purposes of this definition, the term
     "control" (including, with correlative meanings, the terms "controlling,"
     "controlled by" and "under common control with") as applied to any Person,
     means the possession, directly or indirectly, of the power to direct or
     cause the direction of the management of such Person, whether through
     ownership of voting securities, by contract or otherwise, and specifically
     with respect to a corporation or partnership, means direct or indirect
     ownership of fifty percent (50%) or more of the voting stock in such
     corporation or of the voting interest as a partner in such partnership. In
     addition, Seller's Affiliates shall include Equilon Enterprises LLC, Motiva
     Enterprises LLC, Equiva Services LLC and Equiva Trading Company LLC.

          "AGREED RATE" means a rate per annum calculated on a 360-day basis
     which is equal to the lesser of (a) a rate which is one percent (1%) above
     the prime rate of interest of Chase Manhattan Bank, New York, New York, as
     announced or published by such bank from time to time (adjusted from time
     to time to reflect any changes in such rate determined hereunder), or (b)
     the maximum rate from time to time permitted by Applicable Law.


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                                       1
   7

          "AGREEMENT" means this Purchase and Sale Agreement, including the
     Exhibits and Schedules.

          "APPLICABLE LAW" means all laws, statutes, treaties, rules, codes,
     ordinances, regulations, certificates, orders, interpretations, licenses
     and permits of any Governmental Body, including the common or civil law,
     (including, without limitation, those pertaining to occupational health and
     safety, consumer product safety, employee benefits, the environment,
     securities or zoning) and all judgments, decrees, injunctions, writs,
     orders or like action of any court, arbitrator or other Governmental Body
     of competent jurisdiction.

          "ASSETS" means collectively the Contracts, the Easements, the Leases,
     the Fee Interests, the Beneficial Interests and the Other Property, except
     to the extent constituting Excluded Assets.

          "ASSUMED OBLIGATIONS" means, except as constitutes Excluded
     Obligations (i) all liabilities, duties, and obligations that arise from
     the ownership or operation of the Assets after the Effective Date; (ii) all
     liabilities and obligations with respect to Plugging and Abandonment; (iii)
     all duties, liabilities and obligations under the Contracts, the Leases and
     the Easements arising after and in existence as of the Effective Date; (iv)
     the Environmental Obligations and (v) all other duties, liabilities, and
     obligations assumed by Buyer under this Agreement.

          "BENEFICIAL INTERESTS" means any and all rights, titles and interests
     owned by Seller in, under or derived from all of the presently existing
     pooling, unitization and communitization agreements or other operating
     agreements and the units created thereby (including without limitation, all
     units formed under orders, regulations, rules or other official acts of any
     Governmental Body having jurisdiction) not evidenced by Seller's ownership
     of lease or fee interests, including all of Seller's rights, titles and
     interests to such Contracts as set forth on Schedule A.

          "BURDENS" means royalties (including both lessors' royalties and
     nonparticipating royalty interests), overriding royalties, net profits
     interests, production payments, and other similar obligations and burdens
     payable out of production.

          "BUSINESS DAY" means a day on which commercial banks are generally
     open for regular business in Houston, Texas.

          "CLOSING" means the closing of the Contemplated Transactions at 10:00
     a.m. local time at Seller's offices at 1111 Bagby, Houston, Texas, on the
     Closing Date or at such other time or place as the Parties may mutually
     agree upon in writing.

          "CLOSING DATE" means March 30, 2000, or such other date as the Parties
     may agree in writing.


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                                       2
   8


          "CODE" means the Internal Revenue Code of 1986, as amended, or any
     successor law, and regulations or rules issued under any of the foregoing.

          [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]


          "CONTEMPLATED TRANSACTIONS" means each and all of the transactions
     contemplated by the Agreement.

          "CONTRACTS" means, to the extent they are assignable, all of Seller's
     right, title and interest in and to all valid and existing, farmout
     agreements, unitization agreements, pooling agreements, unit declarations,
     gas sales or purchase contracts, operating agreements and other contracts
     attributable to the Assets, or other agreements and instruments (including
     all amendments thereto and any agreements settling claims asserted
     thereunder) to the extent and only to the extent that the same relate,
     pertain or are incidental to the Easements, the Leases, the Fee Interests,
     the Beneficial Interests or the Other Property, including, without
     limitation, those listed on Schedule A, but specifically excluding the
     Easements and Leases.

          "CORPORATE DOCUMENTS" means with respect to a Delaware corporation the
     Certificate of Incorporation and By-Laws or the equivalent documents of a
     corporation organized under the laws of another jurisdiction.

          "EASEMENTS" means Seller's non-exclusive or exclusive, as the case may
     be, rights to the use and occupancy of the surface, including, without
     limitation, tenements, authorizations, variances, appurtenances, surface
     leases, easements, permits, licenses, servitudes, rights-of-way and similar
     rights and interests in any way appertaining, belonging, affixed or
     incidental to or used in connection with the ownership or operation of the
     Leases, Fee Interests, Beneficial Interests or Other Property, including,
     without limitation, those listed on Schedule B hereto, except to the extent
     constituting Excluded Assets.

          [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]


          [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]


          [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]


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                                       3
   9


     [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]




          "EXCLUDED ASSETS" means the following:

               (a) all (i) trade credits, accounts receivable (other than those
          specifically included in the definition of Other Property), notes
          receivable and other receivables attributable to Seller's interest in
          the Assets with respect to any period of time prior to the Effective
          Date, (ii) deposits, cash, checks in process of collection, cash
          equivalents and funds attributable to Seller's interest in the Assets
          with respect to any period of time prior to the Effective Date, and
          (iii) funds attributable to third Persons for production prior to the
          Effective Date but suspended or impounded by Seller;

               (b) all corporate, financial, and tax records of Seller;

               (c) all claims and causes of action of Seller (i) arising from
          acts, omissions or events, or damage to or destruction of property
          occurring prior to the Effective Date, and (ii) affecting any of the
          excluded assets set forth in (a) through (s) of this definition;

               (d) all rights, titles, claims and interests of Seller accruing
          prior to the Effective Date (i) under any policy or agreement of
          insurance or indemnity, (ii) under any bond, or (iii) to any insurance
          or condemnation proceeds or awards;

               (e) all Hydrocarbons produced from or attributable to the Assets
          with respect to all periods prior to the Effective Date including all
          merchantable liquids in stock or sales tanks or associated flowlines,
          together with all proceeds from or of such Hydrocarbons;

               (f) claims of Seller for refund of, or loss carry forwards with
          respect to income or franchise taxes or any other Taxes attributable
          to: (i) any period prior to the Effective Date, or (ii) any of the
          excluded assets set forth in (a) through (s) of this definition;

               (g) all amounts due or payable to Seller as adjustments or
          refunds under any contracts or agreements affecting the Assets, with
          respect to periods prior to the Effective Date, specifically
          including, without limitation, amounts recoverable from audits under
          operating agreements;


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                                       4
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               (h) all amounts due or payable to Seller as adjustments to
          insurance premiums related to the Assets with respect to any period
          prior to the Effective Date;

               (i) all proceeds, benefits, income or revenues accruing (and any
          security or other deposits made) with respect to (i) the Assets prior
          to the Effective Date; and (ii) any of the excluded assets set forth
          in (a) through (s) of this definition;

               (j) all legal files; attorney-client communications or attorney
          work product; records and documents subject to confidentiality
          provisions, claims of privilege or other restrictions (including,
          without limitation, contractual obligations to third Persons) on
          access; and auditor's reports;

               (k) reserve information and reports; seismic, geochemical, and
          geophysical information and data, or other proprietary information
          relating thereto, whether owned or licensed by Seller, and any
          interpretive data except for certain 2D seismic data licensed to Buyer
          pursuant to the Geophysical License Agreement attached hereto as
          Exhibit L;

               (l) all other bids received by Seller for the Assets or any
          portion thereof;

               (m) all of Seller's or Seller's Affiliates' intellectual
          property, including but not limited to proprietary computer software,
          patents, trade secrets, copyrights, names, marks, and logos;

               (n) all of Seller's vehicles, trucks (including associated
          tools), boats, house trailers, tools, pulling machines, warehouse
          stocks, microwave equipment, office computer equipment, remote
          terminal units, equipment or material temporarily located on the
          Assets, except those listed on Schedule C;

               (o) any pipelines, easements, fixtures, tanks, LACT units or
          equipment located on the Assets which belong to third Persons,
          including lessors and Affiliates of Seller;

               (p) all of Seller's interest in the equipment, facilities and
          other assets as more fully described on Schedule D hereto;

               (q) all of Seller's interest in any oil, gas or mineral leases,
          mineral or surface fee or lands which (i) are not set forth on
          Schedule E and Schedule F or (ii) cover or pertain to lands or depths
          other than the particular lands or depths described in the Leases and
          Fee Interests specifically referenced on Schedule E and Schedule F or
          such depths which are specifically excepted or reserved on Schedule E
          and Schedule F;


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                                       5
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               (r) all of Seller's interest in any Assets which are not conveyed
          to Buyer pursuant to the terms of this Agreement due to a Title
          Defect, Material Environmental Condition or other condition; and

               (s) all real or personal property held or owned by Seller's
          Affiliates or any third Persons.


          "EXCLUDED OBLIGATIONS" means, with respect to any Asset, except as
     constitutes Environmental Obligations, any liabilities and obligations of
     Seller (i) due, accrued or owed prior to the Effective Date; (ii) due,
     accrued or owed prior to the Effective Date with respect to the payment of
     Burdens and Taxes; (iii) to third Persons arising from property damage or
     personal injury sustained prior to the Effective Date; (iv) arising from
     any existing litigation or demands made as of the Effective Date; (v)
     arising from or attributable to any Excluded Asset, and (vi) to be retained
     by Seller as expressly provided in this Agreement.

          "FEE INTERESTS" means all rights, titles and interests of Seller owned
     as of the Effective Date and the Closing Date, or acquired pursuant to
     Seller's rights as of the Effective Date and Closing Date under the terms
     of an existing Contract, in all the fee and mineral fee interests described
     on Schedule F, insofar and only insofar as such Fee Interests cover the
     lands and depths set forth in Schedule F. The Fee Interests shall include
     all of Seller's right, title and interest to all depths unless specifically
     limited on Schedule F.

          "GOVERNMENTAL BODY" means any Federal, state, tribal, county, parish,
     municipal, or other federal, state or local governmental authority or
     judicial or regulatory agency, board, body, department, bureau, commission,
     instrumentality, court, tribunal or quasi-governmental authority in any
     jurisdiction (domestic or foreign).

          "HSR ACT" means the Hart-Scott-Rodino Antitrust Improvement Act of
     1976, and all regulations thereunder.

          "HYDROCARBONS" means crude oil, natural gas, casinghead gas,
     condensate, sulphur, natural gas liquids, plant products and other liquid
     or gaseous hydrocarbons (including without limitation, coalbed gas and CO2)
     and shall also refer to all other minerals of every kind and character
     which may be covered by or included in the Assets.

          "KNOWLEDGE" means the actual knowledge of a Party's current corporate
     officers and business unit managers.

          "LEASES" means, except to the extent constituting Excluded Assets, any
     and all rights, titles and interests of Seller owned as of the Effective
     Date and the Closing Date, or acquired pursuant to Seller's rights as of
     the Effective Date and the Closing Date under the terms of an existing
     Contract, in all of the oil, gas or mineral leases, fees, and other
     interests


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                                       6
   12


     described on Schedule E to the Agreement, insofar and only insofar as such
     Leases pertain to the lands and interests described in said Schedule. The
     Leases shall include all of Seller's right, title and interest to all
     depths unless specifically limited on Schedule E.

          "LOSSES" means any and all losses, liabilities, claims, demands,
     penalties, fines, settlements, damages, actions, or suits of whatsoever
     kind and nature (but expressly excluding consequential damages), whether or
     not subject to litigation, including, without limitation (i) claims or
     penalties arising from products liability, negligence, statutory liability
     or violation of any Applicable Law or in tort (strict, absolute or
     otherwise) and (ii) loss of or damage to any property, and all reasonable
     out-of-pocket costs, disbursements and expenses (including, without
     limitation, legal, accounting, consulting and investigation expenses and
     litigation costs).

          [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]














          [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]





     "OTHER PROPERTY" means, except to the extent constituting Excluded Assets,

               (a) all of Seller's interest in all wells (including, without
          limitation, all oil, gas, injection, disposal and other wells, whether
          active or inactive, productive or non-productive, plugged and
          abandoned or temporarily abandoned), platforms, equipment, facilities
          and personal property of any kind including but not limited to tubing,
          casing, wellheads, pumping units, production units, compressors,
          valves, meters, flowlines, pipelines, gathering systems, tanks,
          heaters, separators, dehydrators, pumps and injection units which are
          located on or connected with the Leases, Fee Interests, the Beneficial
          Interests or Easements and which are used


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                                       7
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          solely and exclusively in connection with the production, treatment,
          gathering or transportation of Hydrocarbons from the Leases,
          Properties or Easements;

               (b) [intentionally left blank]

               [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]





               [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]








               (e) subject to Section 4.3(b), all rights, obligations, interests
          and benefits to gas imbalances with respect to the Assets; and

               (f) all licenses, authorizations, permits, variances and similar
          rights and interests related to the Leases, Fee Interests, Beneficial
          Interests, Easements and Contracts and personal property to be
          conveyed hereunder.

          "PERMITTED ENCUMBRANCES" means:

               (a) all Leases, operating agreements, operator liens and working
          interest owner liens for obligations incurred after the Effective
          Date, unit, communitization and pooling agreements, farmout
          agreements, subleases and farmin agreements and other Contracts
          described on Schedule A insofar as same do not operate to increase the
          working interest of the Seller set forth on Schedule G without a
          corresponding increase in the net revenue interest and that do not
          operate to decrease the Seller's net revenue interest set forth on
          Schedule G;

               (b) all Applicable Laws, and all rights reserved or vested in any
          Governmental Body to control or regulate the Assets in any manner
          including, without limitation, any adjustment to Seller's net revenue
          interest or gross working interest in a particular Property, caused
          by, or as the result of, any action of a Governmental Body which is
          not the result of any claims for under-payment of

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                                       8
   14
          royalties owed to such Governmental Body nor the negligent act or
          omission of Seller;

               (c) liens for Taxes or assessments arising after the Effective
          Date not yet due and payable or not yet delinquent, or if delinquent,
          that are being contested in good faith by appropriate action brought
          in the normal course of business and to the extent covered by Seller's
          indemnity under Sections 8.1 and 8.5 hereof;

               (d) reversionary interests arising under farmout and farmin
          agreements, subleases, and the non-consent provisions of applicable
          operating agreements insofar as same do not operate to increase the
          working interest of the Seller set forth on Schedule G without a
          corresponding increase in the net revenue interest and that do not
          operate to decrease the Seller's net revenue interest set forth on
          Schedule G;

               (e) liens imposed by Applicable Law, such as carriers',
          warehousemen's and mechanics' liens and other similar liens arising in
          the ordinary course of business which secure payment of obligations
          arising after the Effective Date or that are not more than sixty (60)
          days past due or which are being contested in good faith to the extent
          covered by Seller's indemnity under Sections 8.1 and 8.5 hereof;

               (f) defects that have been cured by possession under applicable
          statutes of limitation, and

               (g) other minor defects or irregularities generally waived by
          prudent purchasers of oil and gas properties which (i) do not
          materially interfere with the operation, value or use of any of the
          Assets, (ii) do not prevent Buyer from receiving the proceeds of
          production from any of the Assets, (iii) do not operate to increase
          the working interest of the Seller set forth on Schedule G without a
          corresponding increase in the net revenue interest and (iv) do not
          operate to decrease the Seller's net revenue interest set forth on
          Schedule G.

          "PERSON" means any natural person, corporation, division of a
     corporation, association, company, estate, trust, partnership, joint
     venture, unincorporated organization, Governmental Body, or any other
     entity.

          [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]


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                                       9
   15


[TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]



          "PROPERTIES" means an accounting unit described on Schedule G which is
     utilized by Seller for an allocation of revenue and expenses from the
     Assets.

          "PROPERTY PACKAGES" means the East Texas Properties, the Mid-Continent
     Properties and the Permian Basin Properties as identified in Schedule 2.4.

          "TAXES" shall mean any and all fees (including, without limitation,
     documentation, license, recording, filing and registration fees), taxes
     (including without limitation, production, gross receipts, ad valorem,
     value added, windfall profit tax, environmental tax, turnover, sales, use,
     personal property (tangible and intangible), stamp, leasing, lease, user,
     leasing use, excise, franchise, transfer, heating value, fuel, excess
     profits, occupational, interest equalization, lifting, oil, gas, or mineral
     production or severance, and other taxes), levies, imposts, duties, charges
     or withholdings of any nature whatsoever, imposed by any Governmental Body
     or taxing authority thereof, domestic or foreign, together with any and all
     penalties, fines, additions to tax and interest thereon, whether or not
     such tax shall be existing or hereafter adopted.

          "TEPI" shall mean Texaco Exploration and Production Inc.

          "TEPI PSA" shall mean that certain Purchase and Sale Agreement of even
     date herewith by and between Buyer and TEPI.

          [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]


               [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]

               [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]

               [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]


               [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]


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                                       10
   16


               [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]

                    [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]












               [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]

     [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]


          "TRANSITION AGREEMENT" means the transition agreement between TEPI and
     Buyer.

     1.3 OTHER DEFINITIONS IN THE AGREEMENT. The following terms shall have the
respective meanings ascribed to them in the Sections of the Agreement set forth
below opposite such terms:


                                                                    
                   AFEs.................................................3.1(n)
                   Allocated Value......................................2.4
                   Assignments..........................................2.5
                   Buyer................................................Preamble
                   [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
                   [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
                   Deeds................................................2.5
                   [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
                   [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
                   Employees............................................4.3(s)
                   [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
                   [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
                   [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
                   [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
                   [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
                   [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]



- --------------------------------------------------------------------------------
                                       11
   17



                                                                     
                   [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
                   [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
                   Millennium Compliant ................................3.3(d)
                   Oil and Gas Leases...................................2.5
                   Party................................................Preamble
                   Performance Deposit..................................2.3
                   Permits..............................................3.1(j)
                   Purchase Price.......................................2.2
                   Real and Personal Property Taxes.....................7.1(a)
                   Records..............................................1.2
                   Rejection Notice.....................................4.3(m)(iii)
                   [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
                   Reserve Report.......................................3.1(o)
                   Seller...............................................Preamble
                   [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]
                   [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]



     1.4 RULES OF CONSTRUCTION. For purposes of this Agreement:

          (a) GENERAL. Unless the context otherwise requires, (i) "or" is not
     exclusive; (ii) an accounting term not otherwise defined has the meaning
     assigned to it in accordance with accounting principles that are generally
     accepted in the United States of America; (iii) words in the singular
     include the plural and words in the plural include the singular; (iv) words
     in the masculine include the feminine and words in the feminine include the
     masculine; (v) any date specified for any action that is not a Business Day
     shall be deemed to mean the first Business Day after such date; (vi) a
     reference to a Person includes its successors and assigns; and (vii) the
     use of the word "include" or "including" when following any general
     statement, term or matter, shall not be construed to limit such statement,
     term or matter to the specific items or matters set forth immediately
     following such word or to similar items or matters, whether or not
     non-limiting language (such as "without limitation" or "but not limited to"
     or words of similar import) is used with reference thereto, but rather
     shall be deemed to refer to all other items or matters that could
     reasonably fall within the broadest possible scope of such general
     statement, term or matter.

          (b) PARTS AND SECTIONS. References to Parts and Sections are, unless
     otherwise specified, to Parts and Sections of the Agreement. Neither the
     captions to Parts or Sections hereof nor the Table of Contents shall be
     deemed to be a part of the Agreement.

          (c) EXHIBITS AND SCHEDULES. The Exhibits and Schedules form part of
     this Agreement and shall have the same force and effect as if set out in
     the body of this Agreement.

          (d) OTHER AGREEMENTS. References herein to any agreement or other
     instrument shall, unless the context otherwise requires (or the definition
     thereof otherwise


- --------------------------------------------------------------------------------
                                       12
   18


     specifies), be deemed references to that agreement or instrument as it may
     from time to time be changed, amended or extended.


                                    PART TWO

                                SALE AND PURCHASE

     2.1 PURCHASE AND SALE. At the Closing, Seller shall sell, assign and convey
to the Buyer and Buyer shall purchase and pay for the Assets and assume the
Assumed Obligations as provided in 4.2(a) and the Material Environmental
Conditions as set forth in Section 4.2(b).

     [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]






     [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]



          EXCEPT AS PROVIDED UNDER SECTION 9.15, IF BUYER FAILS TO COMPLETE THE
          TRANSACTION SET FORTH IN THIS AGREEMENT, THE PARTIES AGREE THAT SELLER
          SHALL RETAIN, AS SELLER'S SOLE REMEDY, THE PERFORMANCE DEPOSIT AS
          LIQUIDATED DAMAGES, WHICH THE PARTIES AGREE IS A REASONABLE SUM
          CONSIDERING ALL THE CIRCUMSTANCES EXISTING ON THE DATE OF THIS
          AGREEMENT, INCLUDING THE RELATIONSHIP OF THE SUM OF THE RANGE OF HARM
          TO SELLER THAT REASONABLY COULD BE ANTICIPATED AND THE ANTICIPATION
          THAT PROOF OF ACTUAL DAMAGES WOULD BE COSTLY OR INCONVENIENT. IN
          PLACING THEIR INITIALS BELOW, EACH PARTY SPECIFICALLY CONFIRMS THE
          ACCURACY OF THE STATEMENTS MADE ABOVE AND THE FACT THAT EACH PARTY WAS
          REPRESENTED BY COUNSEL WHO EXPLAINED THE CONSEQUENCES OF THIS
          LIQUIDATED DAMAGES PROVISION AT THE TIME THIS AGREEMENT WAS MADE.

                Seller                          Buyer
                Initial                         Initial
                       -----------                     -------------


- --------------------------------------------------------------------------------
                                       13
   19


               [TEXT OMITTED -- CONFIDENTIAL TREATMENT REQUESTED]

     2.5 CLOSING AND PAYMENT OF PURCHASE PRICE. Subject to the terms and
conditions contained herein, this sale and purchase shall close on the Closing
Date. At Closing, Buyer will pay Seller the remaining unpaid portion of the
Purchase Price, adjusted pursuant to the terms of this Agreement, by wire
transfer of collected funds payable to Seller as set forth below. At Closing,
Seller shall deliver to Buyer assignments and bills of sale in the form attached
hereto as Exhibit A (the "Assignments"), deeds in the forms attached hereto as
Exhibits B-1 and B-2 (the "Deeds"), oil and gas leases in the form attached
hereto as Exhibit C (the "Oil and Gas Leases") as well as such certificates or
other documents as are required to effect the transfer of the Assets, or the
subsequent operation thereof.

     2.6 METHOD OF PAYMENT. Any amount payable under this Agreement shall be
payable in immediately available funds by means of a wire transfer, if to
Seller, to Seller's account at Chase Manhattan Bank, 1 Chase Plaza, New York,
New York, ABA #021000021, account number 9102548782 (with immediate telephone
notice to Luci Romano, (914) 253-6071), or to such other account number as
Seller may by written notice direct, or if to Buyer, to Buyer's account as may
be designated by Buyer.


                                   PART THREE

                         REPRESENTATIONS AND WARRANTIES

     3.1 SELLER. Seller represents and warrants to Buyer that, as of the
Effective Date:

          (a) ORGANIZATION AND STANDING. Seller has been duly organized and is
     validly existing in good standing under the laws of the State of Delaware,
     and is duly qualified to do business and is in good standing as a foreign
     corporation in all jurisdictions where the nature of its properties or
     business requires it.

          (b) AUTHORITY AND NO VIOLATION. The Seller has the corporate power and
     authority to execute, deliver and perform its obligations under this
     Agreement. The execution, delivery and performance of this Agreement (a)
     has been duly authorized by all requisite corporate or shareholder action
     and (b) does not conflict with or result in a


- --------------------------------------------------------------------------------
                                       14
   20


     violation or breach of the Corporate Documents of the Seller or of any
     agreement, instrument, statute, regulation, rule, order, writ, judgment or
     decree to which the Seller or its property is directly or indirectly a
     party or is directly or indirectly subject.

          (c) VALIDITY OF AGREEMENT. This Agreement is a legal, valid and
     binding obligation of Seller, enforceable against Seller in accordance with
     the terms of the Agreement, except as enforcement may be limited by
     bankruptcy, insolvency, reorganization or other similar Applicable Laws
     affecting the enforcement of creditor's rights generally. The
     enforceability of Seller's obligations under the Agreement is subject to
     general principles of equity (regardless of whether such enforceability is
     considered in a proceeding in equity or at law).

          (d) NO BANKRUPTCY. There are no bankruptcy, reorganization or
     receivership proceedings pending, being contemplated by, or to the actual
     Knowledge of Seller, threatened against Seller.

          (e) BROKERS' FEES. Seller has not incurred any liability, contingent
     or otherwise, for brokers' or finders' fees relating to the Contemplated
     Transactions for which Buyer shall be liable.

          (f) STATUS. Seller is not a non-resident alien, foreign corporation,
     foreign partnership, foreign trust or foreign estate (as those terms are
     defined in the Code and in the regulations promulgated pursuant thereto.

          (g) LITIGATION. Except as set forth on Schedule 3.1(g), with respect
     to those Assets operated by Seller, there are no actions, suits, or
     proceedings pending [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]










          (h) NO CONSENTS REQUIRED. Except as set forth in Section 4.3(n) and on
     Schedule 3.1(h) or consents required from Governmental Bodies as part of an
     ordinary course transfer, no preferential purchase rights, consents,
     approvals or other action by, or filing with any Person or Governmental
     Body is required in connection with the execution, delivery and performance
     by Seller of the Agreement.

          (i) [this section intentionally left blank].


- --------------------------------------------------------------------------------
                                       15
   21


          (j) PERMITS. Except as set forth on Schedule 3.1(j), as to those
     Assets operated by Seller, Seller has obtained all material permits,
     licenses, and certificates required by Applicable Law in connection with
     the ownership and operation of Assets (the "Permits") and such Permits are
     in full force and effect. Except as set forth on Schedule 3.1(j), to
     Seller's Knowledge as to those Assets not operated by Seller, all Permits
     in connection with the ownership and operation of such Assets have been
     obtained and are in full force and effect. Except as set forth on Schedule
     3.1(j), to Seller's Knowledge there are no outstanding violations with
     respect to such Permits and no judicial, administrative or arbitral
     proceeding is pending or threatened with respect to such Permits

          (k) LEASES. To Seller's Knowledge, (i) all material Leases, unit
     agreements, pooling agreements, communization agreements and other
     Contracts creating interests comprising the Properties are in full force
     and effect, (ii) except as set forth on Schedule 3.1(k) or 3.1(g), since
     January 1, 1996, Seller has not received any written notice from any third
     Person which is still pending claiming any material violation or
     repudiation of the material Leases, unit agreements, pooling agreements,
     communization agreements and other Contracts creating interests comprising
     the Properties, and (iii) Seller is entitled to be paid, and is being paid,
     its interests in the Properties without indemnity or guarantee other than
     those customarily found in division orders and other similar agreements and
     documents.

          (l) IMBALANCES. To Seller's Knowledge and except for Lease obligations
     for the delivery of gas for residential use, the only Contracts pursuant to
     which Hydrocarbons produced from the Assets are being sold are described on
     Schedule A and there are no (i) gas imbalances except as set forth on
     Schedule G (which may be supplemented from time to time before the Closing)
     and as of the date shown on Schedule G which date shall not be more than
     120 days prior to Closing, or (ii) take-or-pay or other prepayments,
     failure of purchasers to pay on a current basis or refund obligations for
     which Buyer would be liable that would have a material, adverse affect on
     Buyer's right to market production.

          [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]




          (n) CURRENT COMMITMENTS. With respect to the Assets operated by
     Seller, Schedule 3.1(n) contains a complete and accurate list as of the
     date of this Agreement of (i) all authorities for expenditures ("AFEs") in
     excess of $50,000 to drill or rework wells or for capital expenditures
     pursuant to any of the Contracts that have been proposed by Seller or any
     third Person on or after the Effective Date, whether or not accepted by
     Seller or any other third Person, and (ii) all AFEs and commitments, other
     than those which have been terminated or expired, in excess of $50,000 to
     drill or rework wells or for other capital


- --------------------------------------------------------------------------------
                                       16
   22


     expenditures pursuant to any of the Contacts for which all of the
     activities anticipated in such AFEs or commitments have not been completed
     by the date of this Agreement.


                [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]


          (p) CONTRACTS. As to those Assets operated by Seller, there are no
     Contracts, other than those Contracts set forth on Schedule A that as of
     the Closing Date inhibit or preclude Buyer from realizing the material
     benefits of the Assets or under which Seller or any other party thereto is
     in default. To Seller's Knowledge, other than those Contracts set forth on
     Schedule A as to those Assets which are not operated by Seller, there are
     no material Contracts under which Seller or any other party thereto is in
     default.

          (q) TAXES. All ad valorem, property, production, severance and other
     taxes based on or measured by the ownership of the Properties or the
     production of Hydrocarbons from the Properties have been properly and
     timely paid except those disputed in ordinary course of business if any,
     for which Seller has indemnified Buyer under Section 8.1 and 8.5 below.

          (r) LIMITATION. The foregoing representations and warranties are given
     by Seller to Buyer and are not intended to be given or used by any other
     Person not a Party to this Agreement.

     3.2 BUYER. Buyer represents and warrants to Seller that, as of the
Effective Date:

          (a) ORGANIZATION AND STANDING. Buyer has been duly organized and is
     validly existing in good standing under the laws of the State of Texas, and
     is duly qualified to do business and is in good standing as a foreign
     corporation in all jurisdictions where the nature of its properties or
     business requires it.

          (b) AUTHORITY AND NO VIOLATION. The Buyer has the corporate power and
     authority to execute, deliver and perform its obligations under this
     Agreement. The execution, delivery and performance of this Agreement (i)
     has been duly authorized by all requisite corporate or shareholder action
     and (ii) does not conflict with or result in a violation or breach of the
     Corporate Documents of the Buyer or of any agreement, instrument, statute,
     regulation, rule, order, writ, judgment or decree to which the Buyer or its
     property is directly or indirectly a party or is directly or indirectly
     subject.

          (c) VALIDITY OF AGREEMENT. This Agreement is a legal, valid and
     binding obligation of Buyer, enforceable against Buyer in accordance with
     the terms of the Agreement, except as enforcement may be limited by
     bankruptcy, insolvency,


- --------------------------------------------------------------------------------
                                       17
   23


     reorganization or other similar Applicable Laws affecting the enforcement
     of creditor's rights generally. The enforceability of Buyer's obligations
     under the Agreement is subject to general principles of equity (regardless
     of whether such enforceability is considered in a proceeding in equity or
     at law).

          (d) NO BANKRUPTCY. There are no bankruptcy, reorganization or
     receivership proceedings pending, being contemplated by, or to the actual
     Knowledge of Buyer, threatened against Buyer.

          (e) BROKERS' FEES. Buyer has not incurred any liability, contingent or
     otherwise, for brokers' or finders' fees relating to the Contemplated
     Transactions for which Seller shall be liable.

          (f) KNOWLEDGEABLE INVESTOR. Buyer is an experienced and knowledgeable
     investor and operator in the oil and gas business. In making its decision
     to participate in this Agreement and the Contemplated Transactions, Buyer
     has relied solely on its own independent investigation, analysis and
     evaluation of the Assets.

          (g) SECURITIES REPRESENTATION. Buyer is acquiring the Assets for its
     own account and not with a view to, or for offer of resale in connection
     with, a distribution thereof, within the meaning of the Securities Act of
     1933, 15 U.S.C. Section 77a et seq., or any other Applicable Laws
     pertaining to the distribution of securities.

          (h) FUNDING. Buyer has arranged to have available by the Closing Date
     sufficient funds, to enable the Buyer to pay in full the Purchase Price as
     herein provided and otherwise to perform its obligations under this
     Agreement.

          (i) OPERATOR STATUS. Buyer is, or will be as of the Closing, a
     qualified operator in good standing with all Governmental Bodies having
     jurisdiction over the Assets.

          (j) GOVERNMENTAL BODY APPROVAL. To Buyer's Knowledge, there are no
     facts or conditions with respect to the Assets that may cause any
     Governmental Body to withhold its unconditional approval of the Assignments
     or Deeds.

          (k) LIMITATION. The foregoing representations and warranties are given
     by Buyer to Seller and are not intended to be given or used by any other
     Person not a Party to this Agreement.

     3.3 DISCLAIMER AND NOTIFICATIONS. THERE ARE NO WARRANTIES, REPRESENTATIONS
OR IMPLIED COVENANTS BETWEEN THE PARTIES EXCEPT THE MATTERS EXPRESSLY PROVIDED
FOR IN THIS AGREEMENT. THE PARTIES RESPECTIVELY DISCLAIM ANY OTHER WARRANTIES OR
REPRESENTATIONS INCLUDING, WITHOUT LIMITATION, ANY WARRANTIES AND
REPRESENTATIONS IMPLIED UNDER APPLICABLE LAW.


- --------------------------------------------------------------------------------
                                       18
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          (a) NO IMPLIED REPRESENTATIONS. IT IS EXPRESSLY UNDERSTOOD BY THE
     PARTIES HERETO THAT SELLER DOES NOT MAKE ANY REPRESENTATIONS OR WARRANTIES,
     EXPRESS OR IMPLIED, AS TO TITLE (EVEN FOR THE RETURN OF THE PURCHASE PRICE
     PAID) OR THE CONDITION OR STATE OF REPAIR OF THE ASSETS, THEIR VALUE,
     QUALITY, MERCHANTABILITY, SUITABILITY OR FITNESS FOR ANY USES OR PURPOSES,
     NOR AS TO THE CURRENT VOLUME, NATURE, QUALITY, CLASSIFICATION, OR VALUE OF
     THE OIL, GAS OR OTHER MINERAL RESERVES THEREUNDER OR COVERED THEREBY, NOR
     WITH RESPECT TO ANY APPURTENANCES THERETO BELONGING OR IN ANY WISE
     APPERTAINING TO SAID ASSETS, OR OTHERWISE. Seller has advised Buyer and
     Buyer has acknowledged that certain spills of Hydrocarbons, produced water
     and chemicals from oil and gas exploration, development, production or
     processing have occurred, or may have occurred, upon the Assets, which
     could have resulted in contamination of the soil, water, ground water, or
     improvements on the Assets. Furthermore, Seller has cautioned Buyer to
     thoroughly examine and inspect the Assets for any such conditions or
     violations and generally as to the condition of the Assets and its
     improvements, including a recommendation by Seller to Buyer that Buyer
     engage an environmental consulting firm to make an environmental survey of
     the Assets, and Buyer hereby acknowledges such obligations and assumes all
     liabilities associated therewith.

          (b) BUYER'S INSPECTION OF THE ASSETS. Further, Buyer certifies that
     the Assets (including, but not limited to, any oil, gas or other mineral
     reserves underlying the Assets) have been, or will be prior to Closing,
     carefully inspected by Buyer; that Buyer is, or will be prior to Closing,
     familiar with their condition and value thereof, and the improvements and
     appurtenances (including electric wiring and machinery installed thereon)
     located on the Assets, inclusive of any Hydrocarbons, other soil
     contaminants or waste substances, whether similar or dissimilar, that may
     be present in the soil, water and groundwater; that Buyer has engaged, or
     has had the opportunity to engage prior to Closing, such contractors or
     consultants as Buyer deems prudent for tests and surveys of the soil,
     water, groundwater, Other Property, and improvements on the Assets; and
     that Buyer assumes any and all obligations, risks and liabilities
     associated therewith. Buyer acknowledges that the Assets have been or may
     have been used in connection with oil, gas and other mineral exploration,
     development and operations, as well as with respect to processing and
     refining operations, and, as such, equipment, appurtenances, processing and
     other facilities, plants, buildings, structures, improvements, abandoned
     and other tanks and piping (including above ground and underground tanks
     and piping), storage facilities, gathering and distribution lines, wells
     and other petroleum production facilities and appurtenances which have not
     been excepted and excluded from this conveyance may be located thereon.
     Further, Buyer acknowledges that the Assets may also contain unplugged
     wells, wellbores or buried pipelines or other equipment, whether or not of
     a similar nature, the locations of which may not now be known by Seller or
     be readily apparent through a physical inspection of the Assets. Buyer
     further accepts the Assets (including, but not limited to, any oil, gas or
     other minerals and/or mineral reserves underlying said Assets) AS IS, WHERE
     IS, IN THEIR PRESENT


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                                       19
   25


     CONDITION AND STATE OF REPAIR, AND WITHOUT ANY REPRESENTATIONS, GUARANTIES,
     OR WARRANTIES, EXPRESS OR IMPLIED, AS TO THEIR TITLE (EVEN FOR THE RETURN
     OF THE PURCHASE PRICE PAID), VALUE, QUALITY, MERCHANTABILITY, OR THEIR
     SUITABILITY OR FITNESS FOR BUYER'S INTENDED USE, OR FOR ANY USES OR
     PURPOSES WHATSOEVER, OR THAT THE ASSETS HAVE BEEN RENDERED FREE FROM ANY
     DEFECTS, HAZARDS, OR DANGEROUS CONDITIONS. FURTHERMORE, BUYER WAIVES ITS
     RIGHTS UNDER THE TEXAS DECEPTIVE TRADE PRACTICES ACT - CONSUMER PROTECTION
     ACT, SECTION 17.41, ET SEQ., BUSINESS AND COMMERCE CODE, A LAW THAT GIVES
     CONSUMERS SPECIAL RIGHTS AND PROTECTIONS. AFTER CONSULTATION WITH AN
     ATTORNEY OF ITS OWN SELECTION, BUYER VOLUNTARILY CONSENTS TO THIS WAIVER.

                         BUYER'S SIGNATURE

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

                         Its:
                              -------------------------



          (c) DISCLAIMER. Without limiting the generality of the foregoing, but
     in furtherance of same, SELLER DISCLAIMS ANY AND ALL LIABILITY ARISING IN
     CONNECTION WITH ANY ENVIRONMENTAL MATTERS INCLUDING, WITHOUT LIMITATION,
     ANY PRESENCE OF NATURALLY OCCURRING RADIOACTIVE MATERIAL (NORM) ON THE
     ASSETS. IN ADDITION, THERE ARE NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR
     IMPLIED, AS TO THE ACCURACY OR COMPLETENESS OF ANY DATA, INFORMATION OR
     MATERIALS HERETOFORE OR HEREAFTER FURNISHED IN CONNECTION WITH THE ASSETS
     OR AS TO THE QUALITY OR QUANTITY OF THE HYDROCARBONS AND ANY OTHER MINERAL
     RESERVES, IF ANY, ATTRIBUTABLE TO THE INTEREST CONVEYED HEREIN OR THE
     ABILITY OF THE ASSETS TO PRODUCE HYDROCARBONS OR ANY OTHER MINERALS, AND
     ANY AND ALL DATA, INFORMATION AND MATERIAL FURNISHED BY SELLER IS PROVIDED
     AS A CONVENIENCE ONLY AND ANY RELIANCE ON OR USE OF THE SAME IS AT BUYER'S
     SOLE RISK.

          (d) YEAR 2000 DISCLAIMER. THE CONTEMPLATED TRANSACTION SHALL BE
     WITHOUT ANY EXPRESS OR IMPLIED WARRANTY OR REPRESENTATION THAT ANY ASSETS
     EXCHANGED HEREUNDER SHALL IN ANY WAY WHATSOEVER BE MILLENNIUM COMPLIANT.
     FOR PURPOSES OF THIS AGREEMENT, "MILLENNIUM COMPLIANT" MEANS THAT THE
     ASSETS WILL ACCURATELY: (A) HANDLE DATA BEFORE, DURING, AND AFTER JANUARY
     1, 2000, INCLUDING, BUT NOT LIMITED TO, ACCEPTING DATE INPUT, PROVIDING
     DATE OUTPUT, AND PERFORMING CALCULATIONS ON DATES OR PORTIONS OF DATES; (B)
     FUNCTION WITHOUT INTERRUPTION


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                                       20
   26


     BEFORE, DURING, AND AFTER JANUARY 1, 2000, WITHOUT ANY CHANGE IN OPERATIONS
     ASSOCIATED WITH THE ADVENT OF THE NEW CENTURY (INCLUDING THE FACT THAT THE
     YEAR 2000 IS A LEAP YEAR); (C) ACCOMMODATE FOUR-DIGIT YEAR INPUT OR RESPOND
     TO TWO-DIGIT YEAR-DATE INPUT IN A WAY THAT RESOLVES THE AMBIGUITY AS TO
     CENTURY IN A DISCLOSED, DEFINED, AND PREDETERMINED MANNER; AND (D) STORE
     AND PROVIDE OUTPUT OF DATE INFORMATION IN WAYS THAT ARE UNAMBIGUOUS AS TO
     CENTURY.



                                    PART FOUR

                                    COVENANTS

     4.1 COVENANTS OF SELLER. Seller covenants with the Buyer as follows:

          (a) ACCESS. From the date of execution of this Agreement until Closing
     except for such of the Assets not operated by Seller, Seller shall afford
     Buyer and Buyer's representatives full and reasonable access to the Assets
     in the possession of Seller during normal working hours.

          (b) FILES. From the date of execution of this Agreement until Closing,
     Seller shall permit Buyer and its representatives at reasonable times
     during normal business hours to examine, in Sellers' offices at their
     actual location, all abstracts of title, title opinions, title files,
     ownership maps, lease files, accounting files, assignments, division
     orders, payout statements, agreements and other Contracts pertaining to the
     Assets insofar as the same may now be in existence and in the possession of
     Seller, except those which constitute Excluded Assets. From the date of
     execution of this Agreement until Closing, Seller shall make available to
     Buyer for inspection by Buyer at reasonable times during normal business
     hours at their actual location, all production and engineering books,
     records and data in possession of Seller which are directly related to the
     Assets, and all other files, records, and data pertaining to the Assets,
     except those which may constitute Excluded Assets.

          (c) CONSENTS. Subject to Section 4.3(n), Seller shall use reasonable
     efforts to obtain all necessary waivers, consents, approvals, permits and
     authorizations and actions of third Persons to complete the Contemplated
     Transactions prior to Closing.

          (d) CONDUCT OF BUSINESS. From the date of execution of this Agreement
     and until the Closing, Seller shall (i) operate the Assets, to the extent
     Seller is the operator thereof, in substantially the same manner as
     heretofore operated; (ii) maintain books of account and records with regard
     to the Assets in accordance with Seller's past practices; and (iii) pay its
     share of all costs and expenses attributable to the Assets in accordance
     with past


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                                       21
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     practices subject to its rights under the Final Recap set forth in Section
     4.3(g). Without limitation of the foregoing but subject to the limitation
     set forth below, after the execution of the Agreement and prior to Closing,
     Seller shall have the right to make any changes, repairs or modifications,
     or incur any expenditures necessary or desirable in Seller's reasonable
     opinion for the protection of the Assets, required under the Contracts, or
     to comply with any Applicable Law or other legal requirement relative to
     the premises or to prevent or react to an emergency or environmental
     incident. Seller shall have the right to effect such expenditure or action
     with or without the approval of Buyer, acting as would any prudent operator
     under similar circumstances. Notwithstanding the foregoing, Seller shall
     not undertake or authorize any project, activity or expenditure in excess
     of $25,000 with respect to any one project without Buyer's prior written
     approval except as may be required (i) to respond to an emergency, (ii) by
     any Governmental Body or (iii) by the terms of any applicable Contract or
     Lease. Unless Buyer and Seller otherwise agree, Seller shall not sell,
     dispose or materially alter the Assets (other than the use of supplies and
     consumables) or remove any improvements, equipment or property which
     comprise the Assets (other than the use of supplies and consumables).

          [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]













     4.2 COVENANTS OF BUYER. Buyer covenants with Seller as follows:

          (a) ASSUMED OBLIGATIONS. At Closing, Buyer shall assume the Assumed
     Obligations.

          [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]




          (c) BUYER'S RESPONSIBILITIES. Except as otherwise provided for in
     Section 4.3(x) and the Transition Agreement, Buyer shall be responsible for
     the payment of all necessary and reasonable capital costs, Taxes, expenses
     and Burdens incurred against or


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

                                       22
   28


     applicable to the operation and use of the Assets from and after the
     Effective Date, whether invoiced or not. All production of Hydrocarbons
     from the Assets occurring from and after the Effective Date and all
     proceeds from or attributable thereto shall be the property of and belong
     to Buyer as of the Effective Date.

          (d) PAYMENT OF BURDENS. Except as otherwise provided in the Transition
     Agreement, Buyer shall commence the payment of Burdens for all Hydrocarbons
     produced beginning the first day of the month following the month in which
     Seller has delivered to Buyer substantially all of the Records including
     without limitations Records relating to accounting, accounts payables,
     division orders and joint interest billings necessary to administer such
     payments.

          (e) CONFIDENTIALITY. In the event that this Agreement is terminated
     or, if not terminated, until the Closing, all information made available to
     Buyer under Section 4.1 shall be maintained confidential by Buyer pursuant
     to the terms of the Confidentiality Agreement. The Confidentiality
     Agreement shall continue in force until Closing, or, in case of
     termination, in accordance with its terms. Buyer shall take whatever
     reasonable steps as may be necessary to ensure that Buyer's employees,
     consultants and agents comply with the provisions of this Section 4.2(e)
     and the provisions of the Confidentiality Agreement.

          (f) SIGNAGE. Buyer agrees that, within thirty (30) days after the
     Closing, it will remove or cause to be removed the names and marks used by
     Seller or TEPI and all variations and derivatives thereof and logos
     relating thereto from the Assets and will not thereafter make any use
     whatsoever of such names, marks and logos.

          (g) COMPLIANCE WITH LAWS. Buyer hereby covenants that it will comply
     with all Applicable Laws in its ownership and operation of the Assets.
     Buyer specifically covenants that it will comply with all Applicable Laws
     with respect to (i) all exploration, drilling, production, Plugging and
     Abandonment, and (ii) the control, regulation and prevention of pollution,
     including, but not limited to, saltwater discharge and contamination.

          (h) RECOUPMENT OF OVERPAYMENTS. Buyer expressly agrees, at Seller's
     cost and expense, to reasonably assist Seller in recouping any monies from
     third Persons due to overpayments of royalties made prior to the Effective
     Date.

          [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]




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          [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]


















          (j) INSURANCE. Buyer covenants that all insurance obtained by Buyer
     during its term of ownership of the Assets covering environmental damage,
     third Person property damage, personal injury or death shall name Seller as
     an additional insured to the extent of Buyer's liability and
     indemnification obligations assumed herein, and shall contain a waiver of
     subrogation against Seller.

          (k) ACCESS. Buyer shall afford Seller the right to enter onto and use
     the Assets and such other resources, including but not limited to water and
     power, as are reasonably necessary for Seller to remedy any Material
     Environmental Condition pursuant to Section 6.1(a).

          (l) RADIO FREQUENCY. Buyer shall undertake as soon as is reasonably
     practical following the Closing to obtain a new pump-off controller radio
     frequencies.



     4.3 COVENANTS OF SELLER AND BUYER. Buyer and Seller agree as follows:

          (a) PREFERENTIAL PURCHASE RIGHTS. With respect to preferential
     purchase rights:

               (i) Within five (5) Business Days of Seller's receipt from Buyer
          of Schedule 2.4, Seller shall send notice to the holders of
          preferential purchase rights on the Assets. Seller shall keep Buyer
          informed as receipt of responses from said


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          holders are received or the applicable exercise periods expire without
          exercise or response from the holders.

               (ii) To the extent any preferential purchase rights are exercised
          to Seller's and Buyer's reasonable satisfaction, then the Assets
          subject to such preferential purchase rights shall not be sold to
          Buyer and shall be excluded from the Agreement. The Purchase Price
          shall be adjusted by the portion of the Allocated Value representing
          the portion of the Assets subject to such exercised preferential
          right. In the event any holder of a preferential right initially
          elects to exercise a particular preferential right, but subsequently
          refuses or elects not to consummate the purchase under the
          preferential right and such refusal occurs prior to sixty (60) days
          following the Closing Date, Buyer shall purchase such interests
          covered by the preferential rights for its Allocated Value as of the
          Effective Date and the closing of such transaction shall take place on
          a date mutually acceptable to Seller and Buyer not more than thirty
          (30) days following Seller's notification to Buyer of such failure or
          refusal.

               (iii) If a preferential purchase right has not been waived or the
          time for exercise expired prior to Closing, the Assets subject to such
          right shall be excluded from the Assets conveyed at Closing and the
          Purchase Price reduced by the Allocated Value of the affected Asset.
          If the time for exercise expires or a waiver is obtained by the Seller
          within 60 days following the Closing, Buyer shall purchase the
          affected Asset from Seller as of the Effective Date and the closing of
          such transaction shall take place on a date mutually acceptable to
          Seller and Buyer not more than thirty (30) days following Seller's
          notification to Buyer for the Allocated Value allocated to the
          affected Asset.

               (iv) If the Seller has failed to offer a preferential right to
          purchase and the holder of such right makes a timely and enforceable
          demand upon Seller or Buyer to offer such right, Buyer shall offer the
          preferential right to purchase to such holder in accordance with the
          Contract creating such preferential right to purchase.

          (b) PRODUCT IMBALANCES. With respect to product imbalances from the
     Assets, the Parties agree as follows:

               (i) UNDERPRODUCTION. The Purchase Price reflects Seller's
          underproduced gas position (if any) under any Contracts or wells
          included in the Assets as shown on Schedule G. As of the Effective
          Date, Buyer shall assume all of Seller's rights, obligations,
          liabilities and responsibilities associated with Seller's
          underproduced gas position, including any Taxes and royalties due or
          payable on the value of Seller's underproduction and Seller shall have
          no further rights or claims whatsoever with respect to the
          underproduced gas. Seller and Buyer agree that the Purchase Price
          shall be adjusted upward at the rate of $1.00 per mcf at Closing to
          reflect the estimated value of any additional underproduction not
          reflected on


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                                       25
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          Schedule G or any reduction in overproduction described in Section
          4.3(b)(ii). Any additional underproduced volumes or reduction in
          overproduction accrued prior to the Effective Date and identified
          after Closing shall be accounted for as provided in Section 4.3(g) at
          the same rate of $1.00 per mcf.

               (ii) OVERPRODUCTION. The Purchase Price reflects Seller's
          overproduced gas position (if any) under any Contracts or wells
          included in the Assets as shown on Schedule G. As of the Effective
          Date, Buyer hereby agrees to and shall assume all rights to Seller's
          overproduced gas position (but not including the gas actually
          overproduced) including the right to recoup Taxes and royalties
          associated with such overproduction, as well as all of Seller's
          liabilities, responsibilities and obligations to third Persons
          associated with such overproduced gas position and Seller shall have
          no further rights, liabilities, obligations or responsibilities
          whatsoever with respect to the overproduced gas. Seller and Buyer
          agree that the Purchase Price shall be adjusted downward at the rate
          of $1.00 per mcf at Closing to reflect the estimated value of any
          additional overproduction not reflected on Schedule G or reduction in
          underproduction described in 4.3(b)(i). Any additional overproduced
          volumes or reductions in underproduction accrued prior to the
          Effective Date and identified after Closing shall be accounted for as
          provided in Section 4.3(g) at the same rate of $1.00 per mcf.

          (c) OPERATORSHIP. Unless otherwise provided in the Transition
     Agreement, Buyer shall assume Seller's obligations for operatorship of any
     Seller-operated Assets conveyed herein at 7:00 a.m. local time on April 1,
     2000, and shall perform all duties required in the course of business,
     including, but not by the way of limitation, paying Burdens and Taxes,
     pumping and gauging wells, working over wells, drilling new wells, filing
     all necessary reports required by Applicable Law or otherwise, and
     performing maintenance and/or repair work on the Assets. To the extent
     required under any Contract that affects any Asset and only after Buyer has
     used its commercially reasonable efforts to assume operatorship of such
     Asset, Seller will continue to operate said Asset pursuant to the
     Transition Agreement until the new operator can be properly selected.
     Seller does not warrant or represent that Buyer shall succeed Seller as
     operator of any Asset; however, Seller shall recommend to its working
     interest owners that Buyer succeed as operator of such Properties operated
     by Seller.

          (d) PROCESSING. At Closing, Buyer shall enter into gas processing
     agreements for the Properties listed on Schedule 4.3(d) in substantially
     the form attached hereto as Exhibit K or such other form as to which Buyer
     and Versado Processors, L.L.C shall have mutually agreed.

          [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]


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[TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]









































               (i) BUYER'S RESPONSIBILITY. In the event Seller is required to
          continue to operate any of the Assets after the Closing Date pursuant
          to an applicable operating agreement or


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                                       27
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          the Transition Agreement, Buyer shall be responsible for the payment
          of all necessary and reasonable capital costs, Taxes, expenses and
          Burdens incurred against or applicable to the operation and use of the
          Assets from and after the Effective Date, whether invoiced or not.
          Buyer shall be responsible for prorated estimates of ad valorem taxes
          in the absence of actuals. Further, all production from the wells
          located on or attributable to the Assets and all proceeds from or
          attributable to production from the Assets and sale thereof shall be
          the property of and belong to Buyer from and after the Effective Date.

               (j) ACCESS TO DOCUMENTS. Each Party shall provide reasonable
          access to all relevant documents, data and other information which may
          be required by the other Party for the purpose of preparing tax
          returns and responding to any audit by any Governmental Body. Each
          Party shall cooperate with all reasonable requests of the other Party
          made in connection with contesting the imposition of Taxes.
          Notwithstanding anything to the contrary in this Agreement, neither
          Party shall be required at any time to disclose to the other Party any
          tax returns or other confidential tax information.


               [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]










               (l) FURTHER ASSURANCES. After Closing, Seller and Buyer agree to
          take such further actions and to execute, acknowledge and deliver all
          such further documents necessary or useful in carrying out the
          purposes of this Agreement or of any document delivered pursuant
          hereto.

               [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]

                    [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]







               [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]


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                  [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]


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               (n) CERTAIN FILINGS, CONSENTS AND PERMITS. With respect to
          certain filings and consents required by any Governmental Body, the
          Parties agree that Buyer and Seller shall cooperate with one another
          to make all filings necessary and to obtain any necessary consents,
          permits, authorizations, approvals or waivers, including but not
          limited to filings


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                                       30
   36


          with the Texas Railroad Commission, Oklahoma Corporation Commission,
          or such other state agency having jurisdiction over the Assets.

               Without limitation of the foregoing, Seller shall endeavor to
          obtain, and Buyer shall cooperate in connection with such endeavors,
          each consent set forth on Schedule 3.1(h).


               (o) CONSENTS.

                    (i) If the holder of the right to consent or party to a
               maintenance of uniform interest provision affirmatively refuses
               to consent or waive prior to Closing, such refusal shall be
               automatically considered a Title Defect without the necessity of
               Buyer sending a Defect Notice to Seller as required under Section
               4.3(m)(i).

                    (ii) Except for approvals from Governmental Bodies normally
               received subsequent to assignment, if Seller believes a consent
               or waiver may be obtained subsequent to Closing, the Property
               shall be excluded from the Assets conveyed at Closing and the
               Purchase Price reduced by the Allocated Value (or portion
               thereof) and held by Seller for the benefit of Buyer after
               Closing and Seller shall provide Buyer with the economic benefits
               thereof until such consent or waiver is received or until sixty
               (60) days following Closing, if later. If Seller obtains the
               consent or waiver on or before sixty (60) days following Closing,
               then Seller shall deliver conveyances of the Property to Buyer
               and Buyer shall pay to Seller the Allocated Value (or portion
               thereof). If the consent or waiver is not obtained or is
               affirmatively refused on or before sixty (60) days following
               Closing, Buyer shall refund to Seller any net revenues (revenues
               net of costs and Burdens) received by Buyer in connection with
               such affected portion of the Property and Seller's holding for
               the benefit of Buyer shall terminate, unless Buyer waives the
               requirement for obtaining the consent and agrees to accept the
               Asset and pay the value allocated to the Asset pursuant to
               Schedule 2.4 in exchange for Seller's conveyance of the Asset.

               (p) RISK OF LOSS. If, prior to the Closing Date, all or any
          material portion of an Asset is damaged or destroyed by fire or other
          casualty, is taken in condemnation or under the right of eminent
          domain or proceedings for such purposes are pending or threatened,
          Buyer shall purchase such portion of the Assets, notwithstanding any
          such damage, destruction, taking or pending or threatened taking.
          Seller shall pay to Buyer (as an adjustment to the Purchase Price) all
          sums paid to Seller by third Persons by reason of the damage,
          destruction or taking of such portion of the Assets to be assigned to
          Buyer or to the extent Seller is self-insured an amount equal to the
          value of the damage or destruction, and shall assign, transfer and set
          over to Buyer all of the right, title and interest of Seller in and to
          any unpaid awards or other payments from third Persons arising out of
          the damage, destruction, taking or pending or threatened taking as to
          such interest. If prior to the Closing Date, the applicable Assets are
          damaged or destroyed by fire or other casualty and the sums
          transferred to Buyer pursuant to the foregoing sentence do not equal
          the amount


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                                       31
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          necessary to replace or restore the pertinent Assets to the condition
          they were in prior to such fire or casualty (including, without
          limitation, those circumstances in which Seller is self-insured),
          Seller shall pay to Buyer, or the Purchase Price shall be reduced by
          the additional amount necessary to repair or replace all damaged or
          destroyed Assets or restore the Assets to their condition prior to the
          fire or casualty loss. If the sums that Seller would be responsible
          for pursuant to the foregoing sentence exceed fifty percent (50%) of
          the Allocated Value of the pertinent Asset, Seller may elect to remove
          the Asset from the sale and reduce the Purchase Price by the allocated
          value of the pertinent Asset. Seller shall not voluntarily compromise,
          settle or adjust any material amounts payable by reason of any
          material damage, destruction, taking or pending or threatened taking
          as to any Asset without first obtaining the written consent of Buyer,
          which shall not be unreasonably withheld.

               (q) POST-CLOSING ACCESS. Except as otherwise expressly provided
          herein, from and after the Closing Date, Buyer and Seller shall
          reasonably cooperate and afford each other or cause to be afforded to
          their respective officers, employees, accountants and other
          representatives access, upon reasonable notice, during business hours
          with respect to the facility to which access has been requested, to
          review and copy the books, documents, databases or other records
          relating to the Assets not including the Excluded Assets (which books,
          documents, databases, records, or employees files or other information
          the Parties shall cooperate and assist one another in identifying and
          locating), interview, depose or seek testimony of employees with
          knowledge of the Assets, provide assistance in proceedings with
          employees with knowledge of the Assets as witnesses or advisors,
          investigate the physical premises, take photographs or videotapes,
          identify employees and contractors with knowledge of any matter which
          is the subject of a claim for which a Party has responsibility and
          make such employees available to such Party and provide reasonable
          office space to do any of the foregoing in connection with any matter
          affecting or alleged to affect the Party requesting such access.

               (r) FILING AND RECORDING OF ASSIGNMENTS, ETC. Buyer shall be
          solely responsible for recording of the Deeds, Assignments and Oil and
          Gas Leases and any other documents related to the Assets and shall
          promptly provide Seller with recorded copies of same. Further, Buyer
          shall be responsible for any recording or filing fees and documentary
          or transfer Taxes resulting from the Contemplated Transactions.

               (s) EMPLOYEE MATTERS. Buyer shall have no obligation, but shall
          have the right to solicit the field employees of Seller (and any other
          employees of Seller that Seller identifies in writing) who work
          directly on or in connection with the Assets ("Employees"), and shall
          have no obligation but shall have the right to offer employment to and
          hire any such Employees. If Buyer hires any Employee, the terms of
          employment shall be at Buyer's discretion. Seller is and shall be
          responsible for any and all employees not hired by Buyer to the extent
          any of Seller's employees are affected by the Contemplated
          Transactions.

               (t) [this section intentionally left blank].


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                                       32
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               (u) [this section intentionally left blank].

               (v) JOINT USE AGREEMENTS. Buyer and Seller shall, from and after
          the date of this Agreement, use their reasonable best efforts to
          negotiate and execute on or before the Closing in the case of items
          identified five (5) days prior to Closing or as soon thereafter as
          reasonably practical, mutually agreeable joint use agreements for the
          use and management of (i) the facilities and other equipment
          identified in Schedule 4.3(v) and incorporating, among others, the
          terms and conditions set forth in Schedule 4.3(v) and (ii) any other
          facilities and equipment used immediately prior to the Effective Date
          to operate or produce both (A) assets and properties being retained by
          Seller and (B) the Assets operated by Seller and which are identified
          in writing by the Buyer within ninety (90) days after Buyer assumes
          operations of the affected Asset.

               (w) CENTRILIFT EQUIPMENT. Seller leases certain equipment, as
          more particularly described on Schedule 4.3(w) in certain wells from
          Centrilift. Within ten (10) days prior to the Closing, Seller shall
          deliver to Buyer the payoff amounts by well for such equipment. Within
          five (5) days before Closing, Buyer shall notify Seller if Buyer
          elects to purchase such leased equipment. If Buyer elects to purchase
          such leased equipment, such equipment shall be included in the
          definition of Assets and Seller will make reasonable efforts to
          arrange for such sale to be consummated within sixty days after
          Closing. Buyer shall reimburse Seller for any costs incurred by Seller
          in furtherance of such purchase. If Buyer elects not to purchase the
          leased equipment, Seller will arrange for the removal of such leased
          equipment at Seller's expense as soon as is reasonably practical
          following the Closing.

               (x) [this section intentionally left blank].

               (y) HSR FILINGS. Buyer and Seller shall promptly make all filings
          required under the HSR Act.

                                    PART FIVE

                              CONDITIONS TO CLOSING

     5.1 SELLER'S CLOSING CONDITIONS. The obligations of Seller to consummate
the Contemplated Transactions are subject to the following conditions:

          (a) REPRESENTATIONS AND WARRANTIES TRUE AT CLOSING. The
     representations and warranties of Buyer contained in the Agreement or in
     connection with the Contemplated Transactions were true and correct when
     made, and shall be true and correct on and as of the Closing Date as though
     such representations and warranties were made at and as of such date except
     as otherwise expressly provided herein.


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                                       33
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          (b) COMPLIANCE WITH AGREEMENT. On and as of the Closing Date, Buyer
     shall have performed and complied with all agreements, covenants, and
     conditions required by this Agreement, the McFarland PSA and the TEPI PSA
     to be performed and complied with prior to or on the Closing Date.

          (c) INJUNCTION. As of the Closing Date, no suit, action or other
     proceeding (excluding any such matter initiated by Seller) shall be pending
     or threatened before any court or governmental agency seeking to restrain
     Seller or prohibit the Closing or seeking damages against Seller as a
     result of the consummation of this Agreement or the Contemplated
     Transactions.

          (d) CERTIFIED RESOLUTIONS AND OFFICERS' CERTIFICATE. Buyer shall have
     delivered to Seller (i) a certificate dated the Closing Date signed by the
     Secretary or an Assistant Secretary of Buyer with respect to the action of
     the Buyer's Board of Directors authorizing the transactions contemplated by
     the Agreement, and (ii) a certificate, dated the Closing Date and signed by
     the President or a Vice President of Buyer certifying in such detail as
     Seller may reasonably request to the fulfillment of the conditions
     specified in subparagraphs (a) and (b) of this Section 5.1, in the form
     attached as Exhibit D.

          (e) APPROVAL OF PROCEEDINGS. All actions, proceedings, instruments and
     documents required of Buyer to carry out the Agreement, or incidental
     thereto, and all other related legal matters shall have been approved by
     Nanette J. Crawford, Esq., as counsel for Seller, which approval shall not
     be unreasonably withheld.

          (f) [This section intentionally left blank].

          (g) CONVEYANCE. Buyer shall execute, acknowledge and deliver to Seller
     the Assignments, Deeds and Oil and Gas Leases substantially in the form of
     Exhibits A, B-1, B-2 and C as well as change of operator forms required by
     Applicable Laws and such other documents as may be necessary to carry out
     the purposes of the Agreement.

          (h) LETTERS IN LIEU. Buyer and Seller shall execute, acknowledge and
     deliver all letters in lieu as set forth in Section 4.3(f).

          (i) SECURITY. Any security required by Seller of Buyer contemplated in
     Section 4.2(i)(ii) shall have been obtained.

          (j) [this section intentionally left blank].

          (k) JOINT USE AGREEMENTS. Buyer and Seller shall have executed,
     acknowledge and delivered, on or before the Closing, certain joint use
     agreements as described in Section 4.3(v).

          (l) [this section intentionally left blank].


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          [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]




          [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]


          (p) [this section intentionally left blank].

          (q) BARGO GUARANTY. Buyer shall have delivered to Seller, in a form
     mutually agreeable to both Buyer and Seller, the guaranty of Bargo Energy
     Company guaranteeing the performance of the Buyer under this Agreement.

          (r) TRANSITION AGREEMENT. Buyer and TEPI shall have executed and
     delivered the Transition Agreement.

          (s) HSR ACT. All necessary filings and notifications under the HSR Act
     shall have been made, including any required additional information or
     documents, and the waiting period referred to in such Act applicable to the
     transactions contemplated hereby shall have expired or been terminated.

     5.2 BUYER'S CLOSING CONDITIONS. The obligations of Buyer to consummate the
Contemplated Transactions are subject to the following conditions:

          (a) REPRESENTATIONS AND WARRANTIES TRUE AT CLOSING. The
     representations and warranties of Seller contained in the Agreement or in
     connection with the Contemplated Transactions were true and correct when
     made, and shall be true and correct on and as of the Closing Date as though
     such representations and warranties were made at and as of such date except
     as otherwise expressly provided herein.

          (b) COMPLIANCE WITH AGREEMENTS. On and as of the Closing Date, Seller
     shall have performed and complied with all agreements, covenants, and
     conditions required by the Agreement to be performed and complied with
     prior to or on the Closing Date. McFarland Energy, Inc. and TEPI shall have
     performed and complied with all agreements, covenants and conditions
     required by the TEPI PSA and the McFarland PSA.


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                                       35
   41


          (c) INJUNCTION. As of the Closing Date, no suit, action or other
     proceeding (excluding any such matter initiated by Buyer) shall be pending
     or threatened before any court or governmental agency seeking to restrain
     Buyer or prohibit the Closing or seeking damages against Buyer as a result
     of the consummation of this Agreement or the Contemplated Transactions.

          (d) CERTIFIED RESOLUTIONS AND OFFICERS' CERTIFICATE. Seller shall have
     delivered to Buyer (i) a certificate dated the Closing Date signed by the
     Secretary or an Assistant Secretary of Seller with respect to the action of
     the Seller's Board of Directors authorizing the transactions contemplated
     by the Agreement, and (ii) a certificate, dated the Closing Date and signed
     by the President or a Vice President of Seller certifying in such detail as
     Buyer may reasonably request to the fulfillment of the conditions specified
     in subparagraphs (a) and (b) of this Section 5.2 in the form attached as
     Exhibit E.

          (e) APPROVAL OF PROCEEDINGS. All actions, proceedings, instruments and
     documents required of Seller to carry out the Agreement, or incidental
     thereto, and all other related legal matters shall have been approved by
     Haynes and Boone, L.L.P., as counsel for Buyer, which approval shall not be
     unreasonably withheld.

          (f) [This section intentionally left blank].

          (g) CONVEYANCE. Seller shall execute, acknowledge and deliver to Buyer
     the Assignments, Deeds and Oil and Gas Leases substantially in the form of
     Exhibits A, B-1, B-2 and C, as well as change of operator forms required by
     Applicable Laws and such other documents as may be necessary to carry out
     the purposes of the Agreement.

          (h) LETTERS IN LIEU. Buyer and Seller shall execute, acknowledge and
     deliver all letters in lieu as set forth in Section 4.3(f).

          (i) [This section intentionally left blank].

          (j) JOINT USE AGREEMENTS. Buyer and Seller shall have executed,
     acknowledge and delivered, on or before the Closing, certain joint use
     agreements as described in Section 4.3(v).

          (k) [This section intentionally left blank].

          [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]

          (m) [This section intentionally left blank].

          (n) TRANSITION AGREEMENT. Buyer and TEPI shall have executed and
     delivered the Transition Agreement.


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                                       36
   42


          (o) HSR ACT. All necessary filings and notifications under the HSR Act
     shall have been made, including any required additional information or
     documents, and the waiting period referred to in such Act applicable to the
     transactions contemplated hereby shall have expired or been terminated.


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     [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]








                                    PART SIX

     [TEXT OMITTED - CONFIDENTIAL TREATMENT REQUESTED]

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                                   PART SEVEN

                                      TAXES

     Section 7.1 PAYMENT AND APPORTIONMENT OF REAL PROPERTY TAXES AND PERSONAL
PROPERTY TAXES. With respect to Taxes:

     (a) Real and Personal Property Taxes. Real property taxes and personal
property taxes ("Real and Personal Property Taxes") for the year in which the
Effective Date occurs shall be apportioned as of the Effective Date between
Seller and Buyer. Seller shall be liable for the portion of such Real and
Personal Property Taxes based upon the number of days in the year occurring
prior to the Effective Date, and Buyer shall be liable for the portion of such
taxes based upon the number of days in the year occurring on and after the
Effective Date. For any year in which an apportionment is required, Buyer shall
file all required reports and returns incident to these taxes and shall remit to
the appropriate taxing authorities all such taxes assessed for the year in which
the Effective Date occurs. Seller may pay to Buyer, at the time of Buyer's
remittance, Seller's share of such taxes.

     (b) Liability and Right to Pursue Claims. Seller shall retain liability for
all adjustments, examinations or claims relating to Taxes that are paid by
Seller and that are allocated to Seller pursuant to this Section 7.1. Seller
shall administer and defend any examination, claim or adjustments arising in
connection with Taxes to be paid by Buyer but which are allocated to Seller
pursuant to this Section 7.1.


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     Section 7.2 OTHER TAXES. All excise, windfall profit and other Taxes
relating to production of Hydrocarbons attributable to the Assets prior to the
Effective Date shall be allocated to Seller, and all such Taxes relating to
production on or after the Effective Date shall be apportioned to Buyer.

     Section 7.3 SALES TAXES. The Purchase Price does not include any sales
Taxes or other transfer Taxes imposed in connection with the sale of the Assets.
Buyer shall pay any sales Tax or other transfer Tax, as well as any applicable
conveyance, transfer and recording fee, and real estate transfer stamps or taxes
imposed on the transfer of the Assets pursuant to the Agreement. If Buyer is of
the opinion that it is exempt from the payment of such sales Tax or other
transfer Tax, Buyer shall furnish to Seller the appropriate tax exemption
certificate.

     Section 7.4 COOPERATION. Each Party to the Agreement shall provide the
other Party with reasonable access to all relevant documents, data and other
information which may be required by the other Party for the purpose of
preparing Tax returns, establishing or defending a Tax position and responding
to any audit by any taxing jurisdiction. Each Party to the Agreement shall
cooperate with all reasonable requests of the other Party made in connection
with contesting the imposition of Taxes. Notwithstanding anything to the
contrary in the Agreement, neither Party to the Agreement shall be required at
any time to disclose to the other Party any Tax returns or other confidential or
privileged Tax information.

     Section 7.5 TAX PROCEEDINGS. In the event Buyer receives notice of any
examination, claim, adjustment or other proceeding relating to the liability for
Taxes of or with respect to Seller for any period Seller is or may be liable
under the Agreement, Buyer shall within ten (10) days notify Seller in writing
thereof. As to any such Taxes for which Seller is or may be liable under the
Agreement, and Seller does not contest such liability as against Buyer, Seller
shall be entitled at Seller's expense to control or settle the contest of such
examination, claim, adjustment or other proceeding, provided Seller notifies
Buyer in writing within thirty (30) days after receipt of the notice described
in the preceding sentence that Seller desires to do so. The Parties shall
cooperate with each in the negotiations and settlement of any proceeding
described in this Section 7.5. Buyer shall provide, or cause to be provided, to
Seller necessary authorizations, including powers of attorney, to control any
proceeding which Seller is entitled to control pursuant to Part 7.

     Section 7.6 PURCHASE PRICE ALLOCATION. The allocation of Purchase Price
provided for in this Agreement is intended to comply with the allocation method
required by Section 1060 of the Code. Buyer and Seller shall cooperate to comply
with all substantive and procedural requirements of Section 1060 and regulations
thereunder. Buyer and Seller agree that each will not take for income Tax
purposes, or permit any Affiliate to take, any position inconsistent with the
allocation of Purchase Price prescribed in this Agreement.

     Section 7.7 RESERVATION OF SECTION 29 CREDITS. Seller retains the right, at
its option, to pursue Tax credits authorized by Section 29 of the Code, if any,
applicable to any production operations occurring prior to the Closing Date.
Buyer agrees to reasonably cooperate at Seller's


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cost and afford Seller and its representatives, upon reasonable notice, during
business hours, time to review and copy any files, documents, databases,
records, or other information, necessary to establish or defend a claim for such
Tax credits.

     Section 7.8 RESERVATION OF SECTION 43 CREDITS. Seller retains the right, at
its option, to pursue Tax credits authorized by Section 43 of the Code, if any,
applicable to any qualified projects occurring prior to the Closing Date. Buyer
agrees to reasonably cooperate at Seller's cost and afford Seller and its
representatives, upon reasonable notice, during business hours, time to review
and copy any files, documents, databases, records, or other information
necessary to establish or defend a claim for such Tax credits.

                                   PART EIGHT

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                                    PART NINE

                                  MISCELLANEOUS

     9.1 SUCCESSORS AND ASSIGNS. This Agreement shall inure to the benefit of
and be binding upon the successors and assigns of the respective Parties.

     9.2 WAIVERS AND AMENDMENTS. All amendments and other modifications hereof
shall be in writing and signed by each of the Parties. Any Party may by written
instrument (i) waive compliance by the other Party with, or modify any of, the
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other Party in this Agreement or (ii) waive or modify performance of any of the
obligations or other acts of the other Party. The delay or failure on the part
of any Party to insist, in any one instance or more, upon strict performance of
any of the terms or conditions of this Agreement, or to exercise any right or
privilege herein conferred shall not be construed as a waiver of any such terms,
conditions, rights or privileges but the same shall continue and remain in full
force and effect. All rights and remedies are cumulative.

     9.3 NOTICES. All notices, consents and other communications under this
Agreement shall be in writing and shall be deemed to have been duly given (a)
when delivered by hand, (b) when sent by telecopier (with receipt confirmed),
provided that a copy is promptly thereafter mailed in the USA by first class
postage prepaid mail, (c) when received by the addressee, if sent by Express
Mail, Federal Express, other express delivery service (receipt requested) or by
such other means as the Parties may agree from time to time or (d) five (5)
Business Days after being mailed in the USA, by first class postage prepaid
registered or certified mail, return receipt requested; in each case to the
appropriate address and telecopier number set forth below (or to such other
address and telecopier number as a Party may designate as to itself by notice to
the other Party):

                           (i)      if to Seller:
                                            Four Star Oil & Gas Company
                                            Attn:  Paula Gatens
                                            1111 Bagby
                                            Houston, Texas  77002
                                            Phone: 713-752-4619
                                            Fax:  713-752-7998

                           (ii)     if to the Buyer:
                                            Bargo Petroleum Corporation
                                            Attn:  Mr. Jon Clarkson
                                            700 Louisiana, Suite 3700
                                            Houston, Texas 77002
                                            Phone: 713-236-9792
                                            Fax: 713-236-9799

Each Party shall have the right upon giving ten (10) Business Days prior written
notice to the other in the manner hereinabove provided, to change its address
for purposes of notice.

     9.4 COUNTERPARTS. This Agreement may be executed in one or more
counterparts, each of which shall be an original, but all of which together
shall constitute one and the same document.

     9.5 ENTIRE AGREEMENT. This Agreement, including the Exhibits and Schedules
hereto, contains the entire agreement between the Parties hereto with respect to
the subject matter hereof and supersedes all prior discussions, understandings,
agreements and undertakings between the Parties hereto relating to the subject
matter hereof. There are no additional terms, whether


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consistent or inconsistent, oral or written which are intended to be part of the
Parties' understanding which have not been incorporated into this Agreement,
including the Exhibits and Schedules.

     9.6 SELLER'S OPTION TO ELECT A TAX DEFERRED EXCHANGE. Seller retains the
right to sell its interest in the Assets to Buyer as a non-simultaneous
like-kind property exchange for cash pursuant to Section 1031 of the Internal
Revenue Code of 1986. Seller shall have the right to elect this tax-deferred
exchange at any time prior to the date of Closing. Buyer agrees to execute
additional escrow instructions, documents, agreements, or instruments to effect
the exchange, provided that Buyer shall incur no material additional costs,
expenses, fees or liabilities as a result of or in connection with the exchange.

     9.7 SEVERABILITY. Every provision in this Agreement is intended to be
severable. If any term or provision hereof is held to be illegal or invalid for
any reason whatsoever, all other conditions and provisions of this Agreement
shall nevertheless remain in full force and effect so long as the economic or
legal substance of Contemplated Transactions is not affected in a materially
adverse manner with respect to either Party.

     9.8 APPLICABLE LAW. This Agreement shall be governed by and interpreted,
construed and enforced in accordance with the laws of the State of Texas, except
to the extent mandatorily governed by the laws of the state in which the Assets
are located

     9.9 EXPENSES. Except as specified herein and as the Parties may otherwise
agree, each Party shall be solely responsible for all expenses incurred by it in
connection with any and all Contemplated Transactions.

     9.10 LAWS AND REGULATIONS. This Agreement is subject to all Applicable
Laws.

     9.11 PUBLIC ANNOUNCEMENTS. The Parties hereto agree that prior to making
any public announcement or statement with respect to the Contemplated
Transaction, the Party desiring to make such public announcement or statement
shall provide the other Party with a copy of the proposed announcement or
statement at least seven (7) Business Days prior to the intended release date of
such announcement. The other Party shall thereafter consult with the Party
desiring to make the release, and the Parties shall exercise their reasonable
best efforts to (i) agree upon the text of a joint public announcement or
statement to be made by both such Parties or (ii) in the case of a statement to
be made solely by one Party, obtain approval of the other Party hereto to the
text of a public announcement or statement. Nothing contained in this paragraph
shall be construed to require either Party to obtain approval of the other Party
hereto to disclose information with respect to the Contemplated Transaction to
any Governmental Body to the extent required by Applicable Law or necessary to
comply with disclosure requirements of the New York Stock Exchange or any other
regulated stock exchange.

     9.12 ASSIGNABILITY. The rights and obligations created or assumed hereunder
shall not be assignable or delegable by either Party and any assignment thereof
shall be void ab initio.


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     9.13 PROVISIONS SURVIVE CLOSING. All representations and warranties
contained in the Agreement shall survive the Closing and continue with respect
to claims made on or before twelve months following the Closing Date. Except as
otherwise provided herein, the covenants, indemnities and agreements made
hereunder or pursuant hereto shall survive Closing and be and remain enforceable
and continue in full force and effect as to their terms and conditions following
Closing and shall not be deemed to have been merged into the Closing or into the
assignments or other closing documents.

     9.14 DISPUTE RESOLUTION. Any and all disputes, controversies or claims
relating to or arising out of the Contemplated Transactions shall be resolved in
accordance with the dispute resolution procedures outlined in Schedule 9.14
attached hereto and made a part hereof for all intents and purposes. The Parties
further agree that neither Party will institute litigation against the other
Party, their Affiliates and each of their respective officers, directors,
shareholders, agents and representatives relating to or arising out of the
Contemplated Transactions, except as provided in the attached Schedule 9.14 and
that the terms and provisions of this Section 9.14 shall survive the termination
of this Agreement.

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IN WITNESS WHEREOF, the Parties hereto have executed this Agreement as of the
date first above written.

                                        SELLER:

                                        FOUR STAR OIL & GAS COMPANY


                                        ----------------------------------------
                                        NAME:  J.K. Hendrickson

                                        TITLE:  Attorney-in-Fact
                                        Tax ID:  51-0078813


                                        BUYER:

                                        BARGO PETROLEUM CORPORATION



                                        ----------------------------------------
                                        NAME:

                                        TITLE:
                                        Tax ID: 75-2526762


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