BENTON OIL & GAS CO
S-4/A, 1995-10-03
CRUDE PETROLEUM & NATURAL GAS
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<PAGE>   1
  As filed with the Securities and Exchange Commission on October 3, 1995
                                                       Registration No. 33-61299
================================================================================
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                               -----------------
                               AMENDMENT NO. 1 TO
                                    FORM S-4
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
                           BENTON OIL AND GAS COMPANY

             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

          DELAWARE                      1311                    77-0196707
(State or other jurisdiction (Primary Standard Industrial    (I.R.S. Employer
     of Incorporation or         Classification Code)     Identification Number)
       organization)

                    ---------------------------------------
                               1145 EUGENIA PLACE
                                   SUITE 200
                         CARPINTERIA, CALIFORNIA 93013
                                 (805) 566-5600
    (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE
                  OF REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
                               -----------------
                                WITH COPIES TO:
                                 Jack A. Bjerke
                Emens, Kegler, Brown, Hill & Ritter Co., L.P.A.
                        65 East State Street, Suite 1800
                              Columbus, Ohio 43215
                                 (614) 462-5400

        APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:
As soon as practicable after the effective date of this Registration Statement.

If the securities being registered on this Form are to be offered in connection
with the formation of a holding company and there is compliance with General
Information G, check the following box. / /

                        CALCULATION OF REGISTRATION FEE

   
<TABLE>
<CAPTION>
                                                            Proposed Maximum    Proposed Maximum
     Title of Each Class of                  Amount to be  Offering Price Per  Aggregate Offering       Amount of
  Securities to be Registered                Registered          Share               Price           Registration Fee
- ---------------------------------------------------------------------------------------------------------------------
<S>                                          <C>           <C>                 <C>                   <C>
Common Stock, par value $.01 per share        189,068(1)       $10.806377        $9,084,683(2)           $3,133(2)
- ---------------------------------------------------------------------------------------------------------------------
Warrants to purchase shares of Common Stock   651,610(1)          (3)                 (3)                   (3)
- ---------------------------------------------------------------------------------------------------------------------
Common Stock Underlying Warrants              651,610             (4)                 (4)                   (4)
- ---------------------------------------------------------------------------------------------------------------------
    

(1)      The Registrant has registered shares of Common Stock and Warrants in
         excess of the aggregate number of shares of Common Stock and Warrants
         offered in the Exchange. The Registration Statement includes additional
         shares of Common Stock and Warrants equal to 10% of the aggregate
         shares of Common Stock and Warrants offered in the Exchange to cover
         Common Stock and Warrants which could be issuable in connection with
         the exercise of dissenters' rights by California investors.

   
(2)      This Registration Statement relates to securities of the Registrant to
         be issued in exchange for partnership interests in the Benton Oil & Gas
         Combination Partnership 1989-1, L.P., a California limited partnership
         (the "1989-1 Partnership"), Benton Oil and Gas Combination Partnership
         1990-1, L.P., a California limited partnership (the "1990-1
         Partnership") and the Benton Oil & Gas Combination Partnership 1991-1,
         (the "1991-1 Partnership:) (collectively referred to as the
         "Partnerships").  Pursuant to Rule 457(f)(2), the offering price per
         share, aggregate offering price and registration fee is calculated
         based on the book value as of June 30, 1995 of a unit of partnership
         interest in the 1989-1 Partnership, the 1990-1 Partnership and the
         1991-1 Partnership of approximately $1,170, $892 and $1,140,
         respectively.  There were 281.8182, 1,419.192 and 281.8182 partnership
         units outstanding in the 1989-1 Partnership, the 1990-1 Partnership and
         the 1991-1 Partnership, respectively, with an aggregate book value of
         $1,916,973.  Pursuant to Rule 457(i), the offering price per share,
         aggregate offering price and registration fee additionally includes the
         maximum amount of consideration which could be received by the
         Registrant upon exercise of the Warrants, which have an exercise price
         of $11.00, per share, with an aggregate maximum amount of consideration
         payable equal to $7,167,710. Of the Registration Fee, the Registrant
         paid $2,491 upon the initial filing of the Registration Statement on
         July 25, 1995.
    

(3)      The offering price per share, aggregate offering price and registration
         fee related to the Warrants are included in the calculations for Common
         Stock, above, as permitted by Rule 457(f)(2).

(4)      Pursuant to Rule 457(i), no additional fees are payable for registering
         the Common Stock underlying the Warrants.
</TABLE>
THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR DATES
AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL FILE
A FURTHER AMENDMENT THAT SPECIFICALLY STATES THAT THIS REGISTRATION STATEMENT
SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF THE
SECURITIES ACT OF 1933 OR UNTIL THIS REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.

================================================================================
<PAGE>   2

                             CROSS REFERENCE SHEET

               Pursuant to Item 501(b) of Regulation S-K Showing
          Location in Prospectus of the Information Required by Part I
                                  of Form S-4.

<TABLE>
<CAPTION>
                          Form S-4 Item                                               Location in Prospectus
                          -------------                                               ----------------------
<S>                                                                 <C>
A.       Information About the Transaction

      1.  Forepart of Registration Statement and Outside Front
          Cover Page of Prospectus................................  Forepart of the Registration Statement; Outside Front
                                                                    Cover Page

      2.  Inside Front and Outside Back Cover Pages of Prospectus.  Table of Contents; Available Information; Information
                                                                    Concerning Benton; Additional Information

      3.  Risk Factors, Ratio of Earnings to Fixed Charges and
          Other Information.......................................  Summary; Risk Factors and Material Considerations

      4.  Terms of the Transaction................................  Summary; The Exchange Offer and Proposal; Method of
                                                                    Determining Exchange Values; Reasons for the Exchange
                                                                    Offer; Consent Procedures; Comparative Rights of Security
                                                                    Holders; Certain Federal Tax Consequences

      5.  Pro Forma Financial Information.........................  Pro Forma Financial Information; Pro Forma Disclosure
                                                                    about Oil and Gas Activities; Pro Forma Combined
                                                                    Estimated Quantities of Oil and Gas Reserves; Pro Forma
                                                                    Oil and Gas Information

      6.  Material Contacts with the Company Being Acquired.......  Summary; The Exchange Offer and Proposal; Method of
                                                                    Determining Exchange Values; Reasons for the Exchange
                                                                    Offer; Information Concerning 1989-1 Partnership;
                                                                    Information Concerning 1990-1 Partnership; Information
                                                                    Concerning 1991-1 Partnership

      7.  Additional Information Required for the offering by
          Persons and Parties Deemed to be Underwriters...........  Not applicable

      8.  Interests of Named Experts and Counsel..................  Summary; The Exchange Offer and Proposal; Legal Matters;
                                                                    Experts
</TABLE>

<PAGE>   3
<TABLE>
<CAPTION>
                          Form S-4 Item                                               Location in Prospectus
                          -------------                                               ----------------------
<S>                                                                 <C>
      9.  Disclosure of Commission Position on Indemnification
          for Securities Act Liabilities..........................  Not Applicable

B. Information About the Registrant

      10. Information with Respect to S-3 Registrants.............  Available Information; Incorporation of Certain Documents
                                                                    by Reference; Summary; Risk Factors and Material
                                                                    Considerations; Price Range of Common Stock, Dividends
                                                                    and Distributions; Background of Exchange Offer; The
                                                                    Exchange Offer and Proposal; Reasons for the Exchange
                                                                    Offer; Failure to Approve the Proposals; Comparative
                                                                    Rights of Security Holders; Pro Forma Financial
                                                                    Information; Information Concerning Benton; Description
                                                                    of Securities

      11. Incorporation of Certain Information by Reference.......  Incorporation of Certain Documents by Reference

      12. Information with Respect to S-2 or S-3 Registrants......  Not Applicable

      13. Incorporation of Certain Information by Reference.......  Not Applicable

      14. Information with Respect to Registrant Other than S-3
          of S-2 Registrants......................................  Not Applicable

C. Information About the Company Being Acquired

      15. Information with Respect to S-3 Companies...............  Not Applicable

      16. Information with Respect to S-2 or S-3 Companies........  Not Applicable

      17. Information with Respect to Companies other than S-3 or

          S-2.....................................................  Summary; Price Range of Common Stock, Dividends and
                                                                    Distributions; Background of Exchange offer; The Exchange
                                                                    Offer and Proposal; Method of Determining Exchange
                                                                    Values; Reasons for the Exchange Offer; Failure to
                                                                    Approve the Proposals; Comparative Rights of Security
                                                                    Holders; Information Concerning 1989-1 Partnership;
                                                                    Information Concerning 1990-1 Partnership; Information
                                                                    Concerning 1991-1 Partnership; Financial Statements of
                                                                    1990-1 Partnership; Financial Statements of 1991-1
                                                                    Partnership
</TABLE>

<PAGE>   4
<TABLE>
<CAPTION>
                          Form S-4 Item                                               Location in Prospectus
                          -------------                                               ----------------------
<S>                                                                 <C>
D. Voting and Management Information

      18. Information if Proxies, Consents or Authorizations are
          to Be Solicited.........................................  Not Applicable

      19. Information if Proxies, Consents of Authorizations are
          not to be Solicited or in an Exchange Offer.............  Summary; The Exchange Offer; Consent Procedures;
                                                                    Information Concerning Benton; Information Concerning
                                                                    1989-1 Partnership; Information Concerning 1990-1
                                                                    Partnership; Information Concerning 1991-1 Partnership
</TABLE>


<PAGE>   5
                            SUBJECT TO COMPLETION
                            DATED OCTOBER 3, 1995

   

                                 EXCHANGE OFFER
                 AN AGGREGATE OF 171,880 SHARES OF COMMON STOCK
    AND WARRANTS TO PURCHASE AN AGGREGATE OF 592,373 SHARES OF COMMON STOCK
                            FOR PARTNERSHIP UNITS IN
        BENTON OIL & GAS COMBINATION PARTNERSHIP 1989-1, L.P. (281.8182
                               PARTNERSHIP UNITS)
        BENTON OIL & GAS COMBINATION PARTNERSHIP 1990-1, L.P. (1,419.192
                               PARTNERSHIP UNITS)
                                      AND
        BENTON OIL & GAS COMBINATION PARTNERSHIP 1991-1, L.P. (281.8182
                               PARTNERSHIP UNITS)

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

                                EXCHANGE RATIO:
     107 SHARES OF COMMON STOCK AND 35 WARRANTS PER 1989-1 PARTNERSHIP UNIT
     81 SHARES OF COMMON STOCK AND 334 WARRANTS PER 1990-1 PARTNERSHIP UNIT
     95 SHARES OF COMMON STOCK AND 385 WARRANTS PER 1991-1 PARTNERSHIP UNIT
    

         This Prospectus (the "Prospectus") and accompanying Supplement is being
furnished to the Investors ("Investors") in the Benton Oil & Gas Combination
Partnership 1989-1, L.P., a California limited partnership (the "1989-1
Partnership"), the Benton Oil & Gas Combination Partnership 1990-1, L.P., a
California limited partnership (the "1990-1 Partnership") and the Benton Oil &
Gas Combination Partnership 1991-1, L.P., a California limited partnership (the
"1991-1 Partnership") (collectively, the "Partnerships"), in connection with the
offer by Benton Oil and Gas Company, a Delaware corporation and the managing
general partner of each of the Partnerships ("Benton," or "Company," or
"Managing General Partner") to exchange shares of Common Stock, $.01 par value
of Benton ("Common Stock") and Warrants ("Warrants") to purchase shares of
Common Stock of Benton (the "Exchange Offer") for all of the right, title and
interest to units of Partnership interest in each of the Partnerships
("Partnership Units") held by Investors, at the exchange rate outlined below.
   
         Benton is offering to exchange shares of Common Stock and Warrants to
owners of Partnership Units in the 1989-1 Partnership ("1989-1 Units"), the
1990-1 Partnership (the "1990-1 Units") and the 1991-1 Partnership (the "1991-1
Units") on the basis of $5,000.00 original investment on the terms and in the
amounts set forth herein. See "Exchange Offer and Proposal" at page 51 and
"Method of Determining Exchange Values" at page 58. The Warrants to be issued
in connection with the Exchange Offer are execrable at a price of $11.00 per
share and will expire three years form the date of issuance. For detailed
information regarding the determination of the Total Exchange Values for each of
the Partnerships, see "Method of Determining Exchange Values." On October 2,
1995, the last reported sales price of the Common Stock, as reported on NASDAQ
National Market, was $ 11.13.
    
         In connection with the Exchange Offer, Benton is submitting Proposals
to Investors in each of the Partnerships to amend the respective Partnership
Agreements to provide for the transfer of all of the assets and liabilities of
the Partnerships to Benton as of the December 31, 1994 Effective Date in
exchange for Common Stock and Warrants in the amounts set forth herein and the
pro rata distribution of such consideration in liquidation of the Partnerships.
Each Investor who tenders his Partnership Units pursuant to the Exchange Offer
will, by that tender, consent to the Proposal.

<PAGE>   6
   
         ADOPTION OF EACH OF THE PROPOSALS REQUIRES THE CONSENT OF INVESTORS OF
SUCH PARTNERSHIP HOLDING 75% OR MORE OF THE PARTNERSHIP UNITS. IF INVESTORS IN A
PARTNERSHIP HOLDING 75% OR MORE OF THE PARTNERSHIP UNITS ACCEPT THE EXCHANGE
OFFER AND CONSENT TO THE PROPOSAL, ALL NON-DISSENTING HOLDERS OF UNITS IN THAT
PARTNERSHIP WILL BE BOUND BY THE TERMS OF THE EXCHANGE AND PROPOSAL AND WILL
RECEIVE THE NUMBER OF SHARES OF COMMON STOCK AND WARRANTS DESCRIBED HEREIN.
DISSENTING HOLDERS WILL BE BOUND BY THE EXCHANGE OFFER AND WILL RECEIVE THE
NUMBER OF SHARES OF COMMON STOCK AND WARRANTS COMPUTED IN ACCORDANCE WITH
CALIFORNIA DISSENTERS' RIGHTS STATUTES. EACH OF THE EXCHANGE OFFERS TO THE
PARTNERSHIPS IS INDEPENDENT OF THE EXCHANGE OFFER TO THE OTHER PARTNERSHIPS. THE
EXCHANGE WILL ONLY BE CONSUMMATED FOR THOSE PARTNERSHIPS IN WHICH THE PROPOSAL
HAS BEEN APPROVED BY THE INVESTORS. BENTON OIL AND GAS COMPANY, IN ADDITION TO
BEING MANAGING GENERAL PARTNER OF THE THREE PARTNERSHIPS, OWNS 2.8182 1989-1
UNITS, 14.192 1990-1 UNITS AND 2.8182 1991-1 UNITS AND WILL VOTE SUCH UNITS THE
SAME AS A MAJORITY OF INVESTORS VOTE THEIR UNITS. INVESTORS WILL RECEIVE THE
CONSIDERATION SET FORTH HEREIN, AND THE RESPECTIVE PARTNERSHIP WILL BE
DISSOLVED.
    

         ASSUMING CONSUMMATION OF THE EXCHANGE OFFER, ALL OF THE INVESTORS IN A
PARTNERSHIP WHICH HAS APPROVED THE PROPOSAL PRESENTED TO SUCH PARTNERSHIP,
WHETHER OR NOT THEY TENDER THEIR UNITS AND THUS VOTE IN FAVOR OF THE PROPOSAL,
WILL RECEIVE THE SAME NUMBER OF SHARES OF COMMON STOCK AND WARRANTS AS THEY
WOULD HAVE RECEIVED HAD THEY TENDERED THEIR PARTNERSHIP UNITS AND THE RESPECTIVE
PARTNERSHIP WILL BE DISSOLVED.

         THE EXCHANGE OFFER INVOLVES VARIOUS RISKS THAT SHOULD BE CONSIDERED BY
INVESTORS. SEE "RISK FACTORS AND MATERIAL CONSIDERATIONS," BEGINNING ON PAGE 34
OF THIS PROSPECTUS. IN PARTICULAR, INVESTORS SHOULD CONSIDER THE FOLLOWING
FACTORS:

         -     INVESTORS HAVE RECEIVED CASH DISTRIBUTIONS FROM THE PARTNERSHIPS,
               BUT WILL RECEIVE NO CASH DISTRIBUTIONS OR DIVIDENDS IN THE
               FORESEEABLE FUTURE FROM BENTON.

         -     THE MARKET PRICE OF THE COMMON STOCK COULD DECLINE BELOW THE
               MARKET PRICE USED FOR CALCULATION OF THE RESPECTIVE EXCHANGE
               RATES, EXPOSING INVESTORS TO A REDUCED RETURN ON THEIR
               INVESTMENT.

         -     THE EXCHANGE VALUE OF THE PARTNERSHIP UNITS WAS DETERMINED BY
               BENTON, WHICH HAS INHERENT CONFLICTS OF INTEREST, AND MAY NOT
               REFLECT THE VALUE OF THE NET ASSETS OF THE RESPECTIVE PARTNERSHIP
               IF SOLD TO AN UNAFFILIATED THIRD PARTY IN AN ARM'S LENGTH
               TRANSACTION.

         -     BENTON HAS ATTRIBUTED A PRESENT VALUE TO THE WARRANTS, USING THE
               BLACK-SCHOLES OPTION PRICING MODEL. HOWEVER, THE ACTUAL VALUE, IF
               ANY, A HOLDER MAY REALIZE FROM THE WARRANTS WILL DEPEND ON THE
               EXCESS OF THE MARKET PRICE OF THE COMMON STOCK OVER THE EXERCISE
               PRICE OF THE WARRANT ON THE DATE THE WARRANT IS EXERCISED.
   
         -     BENTON'S DETERMINATIONS OF THE RESPECTIVE EXCHANGE VALUES WERE
               BASED PRIMARILY ON THE ESTIMATED PRESENT VALUE OF EACH
               PARTNERSHIP'S PROVED OIL AND GAS RESERVES, WHICH INVOLVES MANY
               UNCERTAINTIES AND COULD RESULT IN AN UNDERVALUATION OF
               PARTNERSHIP UNITS. ALTHOUGH SUPPORTED BY AN INDEPENDENT OFFER FOR
               THE PURCHASE OF SUBSTANTIALLY ALL OF THE ASSETS OF EACH OF THE
               PARTNERSHIPS, THERE CAN BE NO ASSURANCE THAT THE RESPECTIVE
               EXCHANGE VALUES REPRESENT THE VALUE THE PARTNERSHIPS COULD
               RECEIVE IN THE SALE OF THE ASSETS OF THE PARTNERSHIP.
    
<PAGE>   7
         -     THE ALTERNATIVES OF CONTINUING THE PARTNERSHIPS OR LIQUIDATING
               THEIR ASSETS COULD POTENTIALLY BE MORE BENEFICIAL TO INVESTORS
               THAN THE EXCHANGE OFFER.

         -     NO INDEPENDENT REPRESENTATIVE WAS ENGAGED TO REPRESENT THE
               UNAFFILIATED INVESTORS IN NEGOTIATING THE TERMS OF THE EXCHANGE
               OFFER, WHICH MAY BE INFERIOR TO THOSE THAT COULD HAVE BEEN
               NEGOTIATED BY AN INDEPENDENT REPRESENTATIVE.

         -     INVESTORS HAVE NO DISSENTER'S RIGHTS IN THE EXCHANGE OFFER,
               OTHER THAN LIMITED DISSENTERS' RIGHTS FOR CALIFORNIA RESIDENTS,
               AND THEREFORE CANNOT ELECT TO RECEIVE CASH FOR THEIR PARTNERSHIP
               UNITS.

         -     OWNERSHIP OF COMMON STOCK MAY INVOLVE GREATER RISK THAN AN
               INVESTMENT IN THE PARTNERSHIP UNITS BECAUSE OF BENTON'S BROADER
               OPERATIONS, INCLUDING FOREIGN OPERATIONS, AND ITS USE OF DEBT TO
               FINANCE ONGOING OPERATIONS.

   
         -     FUTURE EQUITY OFFERINGS BY BENTON COULD POTENTIALLY BE DILUTIVE
               TO INVESTORS HOLDING COMMON STOCK OR WARRANTS.
    

   
         The Exchange may be withdrawn at any time prior to its scheduled
expiration date if Benton reasonably determines that a material change affecting
the Partnerships or the Company has occurred. THE EXCHANGE WILL ONLY BE
CONSUMMATED FOR THOSE PARTNERSHIPS IN WHICH THE PROPOSAL HAS BEEN APPROVED BY
THE INVESTORS. The assets and liabilities of any Partnership which approves the
respective Proposal and adopts the Exchange Offer will be transferred to Benton
effective as of December 31, 1994 (the "Effective Date").
    

THE EXCHANGE OFFER EXPIRES AT 5:00 P.M. PACIFIC TIME ON ____________, 1995
UNLESS EXTENDED.

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

This Prospectus also constitutes the prospectus of Benton with respect to the
shares of Common Stock and Warrants to be issued as consideration in the
Exchange Offer. Benton has filed a Registration Statement on Form S-4 (together
with any amendments thereto, the "Registration Statement") with the Securities
and Exchange Commission (the "SEC"), of which this Prospectus and Supplement are
a part.

THE SHARES OF COMMON STOCK AND WARRANTS TO BE ISSUED IN CONNECTION WITH THE
EXCHANGE HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND EXCHANGE
COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE ACCURACY
OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL
OFFENSE.

The approximate date on which this Prospectus and the accompanying Supplement
will first be mailed to the Investors of the Partnerships is __________, 1995.

               THE DATE OF THIS PROSPECTUS IS ____________, 1995.


<PAGE>   8
                             AVAILABLE INFORMATION

         Benton is subject to the informational requirements of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), and in accordance
therewith files reports, proxy statements and other information with the SEC.
The reports, proxy statements and other information filed by Benton with the SEC
can be inspected and copied at the public reference facilities maintained by the
SEC at Room 1024, 450 Fifth Street, N.W., Washington, D.C. 20549, and should be
available at the SEC's regional offices at 7 World Trade Center, New York, New
York 10048, and 500 West Madison Street, 14th Floor, Chicago, Illinois 60661.
Copies of such material may be obtained at prescribed rates from the Public
Reference Section of the SEC at 450 Fifth Street, N.W., Washington, D.C. 20549.
The Common Stock is quoted on the National Association of Securities Dealers,
Inc. Automated Quotation System/National Market System ("NASDAQ-NMS"), and
certain of Benton's reports, proxy materials and other information may be
available for inspection at the offices of the National Association of
Securities Dealers, Inc., 1735 K Street, N.W., Washington, D.C. 20006.

   
         Benton has filed the Registration Statement with the SEC under the
Securities Act of 1933, as amended (the "Securities Act"), with respect to the
Common Stock and Warrants to be issued in connection with the Exchange. This
Prospectus does not contain all of the information set forth in the Registration
Statement and the exhibits thereto, certain parts of which are omitted in
accordance with the rules and regulations of the SEC. Such additional
information may be obtained from the SEC's principal office in Washington, D.C.
    

                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

   
         The following documents, heretofore filed by Benton with the SEC
pursuant to the Exchange Act, are hereby incorporated by reference, except as
superseded or modified herein (i) Benton's Annual Report on Form 10-K for the
fiscal year ended December 31, 1994, as amended on Forms 10-K/A on May 2, 1995
and July 11, 1995; (ii) Benton's quarterly report on Form 10-Q for the quarter
ended March 31, 1995; (iii) Benton's quarterly report on Form 10-Q for the
quarter ended June 30, 1995; (vi) Benton's Current Report on Form 8-K filed on
April 17, 1995; (v) Benton's Current Report on Form 8-K filed May 31, 1995; (vi)
Benton's Registration Statement on Form 8-A filed on May 4, 1995, effective May
19, 1995; and (vii) the description of Common Stock set forth in Benton's
Registration Statements and amendments filed pursuant to the Exchange Act on
March 17, 1989, May 14, 1991 and May 15, 1992.
    

         All documents and reports filed by Benton with the SEC pursuant to
Section 13(a), 13(c), 14 or 15(d) of the Exchange Act after the date of this
Prospectus and prior to the date of consummation of the transaction and
expiration of the Exchange Offer shall be deemed to be incorporated by reference
in this Prospectus and to be a part hereof from the dates of filing of such
documents or reports. Any statement contained in a document incorporated or
deemed to be incorporated by reference herein shall be deemed to be modified or
superseded for purposes of this Prospectus to the extent that a statement
contained herein or in any other subsequently filed document which also is or is
deemed to be incorporated by reference herein modifies or supersedes such
statement. Any such statement so modified or superseded shall not be deemed,
except as so modified or superseded, to constitute a part of this Prospectus.


                                       i
<PAGE>   9
         THIS PROSPECTUS INCORPORATES DOCUMENTS BY REFERENCE WHICH ARE NOT
PRESENTED HEREIN OR DELIVERED HEREWITH. SUCH DOCUMENTS (OTHER THAN EXHIBITS TO
SUCH DOCUMENTS, UNLESS SUCH EXHIBITS ARE SPECIFICALLY INCORPORATED BY REFERENCE
TO SUCH DOCUMENTS) ARE AVAILABLE, WITHOUT CHARGE, TO ANY PERSON, INCLUDING ANY
BENEFICIAL OWNER, TO WHOM THIS PROSPECTUS IS DELIVERED, ON WRITTEN OR ORAL
REQUEST TO: BENTON OIL AND GAS COMPANY, 1145 EUGENIA PLACE, SUITE 200,
CARPINTERIA, CALIFORNIA 93013, ATTENTION: CORPORATE SECRETARY, TELEPHONE (805)
566-5600. IN ORDER TO ENSURE DELIVERY OF THE DOCUMENTS PRIOR TO THE EXPIRATION
OF THE EXCHANGE OFFER, REQUESTS MUST BE RECEIVED BY ________, 1995.

         No person is authorized to give any information or to make any
representation not contained in this Prospectus or in the documents incorporated
herein by reference in connection with the solicitation and the offering made
hereby and, if given or made, such information or representation should not be
relied upon as having been authorized by Benton. This Prospectus does not
constitute an offer to sell, or a solicitation of an offer to purchase, the
securities offered by this Prospectus, or the solicitation of a tender from any
person, in any jurisdiction in which it is unlawful to make such offer,
solicitation of an offer or tender solicitation. Neither the delivery of this
Prospectus nor any distribution of the securities made under this Prospectus
shall, under any circumstances, create an implication that there has been no
change in the affairs of Benton and the Partnerships since the date of this
Prospectus other than as set forth in the documents incorporated herein by
reference.

                                       ii
<PAGE>   10
                               TABLE OF CONTENTS

<TABLE>
<S>                                                                                        <C>
SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     1
     Risk Factors and Material Considerations   . . . . . . . . . . . . . . . . . . . .     1
     The Parties  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     4
     The Exchange Offer and Proposals   . . . . . . . . . . . . . . . . . . . . . . . .     5
     Background and Alternatives to the Exchange  . . . . . . . . . . . . . . . . . . .     7
     Reasons for the Exchange Offer; Recommendation of the Managing General Partner . .    11
     Managing General Partners Determination that Offer is Fair   . . . . . . . . . . .    13
     Summary of Tax Consequences  . . . . . . . . . . . . . . . . . . . . . . . . . . .    15
     Accounting Treatment   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    16
     Request For Investor Listing   . . . . . . . . . . . . . . . . . . . . . . . . . .    16
     Business of Benton and the Partnerships After the Consummation of the Exchange . .    16
     Comparative Rights of Security Holders   . . . . . . . . . . . . . . . . . . . . .    16
     Dissenters' Rights   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     6
     Resales of Benton Common Stock   . . . . . . . . . . . . . . . . . . . . . . . . .    17
     Description of the Warrants  . . . . . . . . . . . . . . . . . . . . . . . . . . .    17
     Method of Determining Exchange Value for 1989-1 Partnership. . . . . . . . . . . .    18
     Method of Determining Exchange Value for 1990-1 Partnership. . . . . . . . . . . .    20
     Method of Determining Exchange Value for 1991-1 Partnership. . . . . . . . . . . .    24
     Consent Procedures   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    26
     Conditions to Exchange   . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    27
     Regulatory Approvals   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    27
     Certain Historical and Pro Forma Financial Data  . . . . . . . . . . . . . . . . .    27
     Certain Comparative Information  . . . . . . . . . . . . . . . . . . . . . . . . .    33
RISK FACTORS AND MATERIAL CONSIDERATIONS  . . . . . . . . . . . . . . . . . . . . . . .    34
     Risks Related to the Exchange Offer  . . . . . . . . . . . . . . . . . . . . . . .    34
     Risks Related to Benton  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    37
     Risks Related to the Oil and Gas Industry  . . . . . . . . . . . . . . . . . . . .    41
PRICE RANGE OF COMMON STOCK, DIVIDENDS AND DISTRIBUTIONS  . . . . . . . . . . . . . . .    43
BACKGROUND OF EXCHANGE OFFER  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    45
     1989-1 Partnership . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    45
     1990-1 Partnership . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    46
     1991-1 Partnership . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    47
     Goldking Offer   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    49
THE EXCHANGE OFFER AND PROPOSAL . . . . . . . . . . . . . . . . . . . . . . . . . . . .    51
     Description of the Exchange Offer  . . . . . . . . . . . . . . . . . . . . . . . .    51
     The Proposal   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    51
     Dissenters' Rights   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    53
     Distribution of Common Stock and Warrants  . . . . . . . . . . . . . . . . . . . .    53
     Election to Receive Cash In Lieu of Common Stock   . . . . . . . . . . . . . . . .    53
     Interests of Certain Persons in the Exchange and Proposals   . . . . . . . . . . .    54
     Resale of Benton Common Stock  . . . . . . . . . . . . . . . . . . . . . . . . . .    54
</TABLE>


                                      iii
<PAGE>   11
<TABLE>
<S>                                                                                       <C>
     Fractional Shares  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    54
     Stock Exchange Listing   . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    55
     Accounting Treatment   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    55
     Closing Date   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    55
     Operations After the Exchange  . . . . . . . . . . . . . . . . . . . . . . . . . .    55
     Expenses; Fees   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    56
     Benton's Dividend Policy   . . . . . . . . . . . . . . . . . . . . . . . . . . . .    56
     Litigation and Related Matters   . . . . . . . . . . . . . . . . . . . . . . . . .    56
METHOD OF DETERMINING EXCHANGE VALUES . . . . . . . . . . . . . . . . . . . . . . . . .    58
     General  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    58
     1989-1 Partnership Exchange Value Components . . . . . . . . . . . . . . . . . . .    59
     1990-1 Partnership Exchange Value Components . . . . . . . . . . . . . . . . . . .    60
     1991-1 Partnership Exchange Value Components . . . . . . . . . . . . . . . . . . .    63
RECOMMENDATION OF THE MANAGING GENERAL PARTNER  . . . . . . . . . . . . . . . . . . . .    65
     Managing General Partner's Reasons for Proposing the Exchange Offer  . . . . . . .    65
     Managing General Partner's Determination that Exchange Offer is Fair   . . . . . .    68
     Benefits of Continued Operations   . . . . . . . . . . . . . . . . . . . . . . . .    72
     Benefits of Liquidation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    76
     Lack of Independent Representative   . . . . . . . . . . . . . . . . . . . . . . .    82
     Board of Directors of Benton; Benton's Reasons for the Exchange  . . . . . . . . .    83
     Fiduciary Duties of Benton   . . . . . . . . . . . . . . . . . . . . . . . . . . .    83
     Access to Investor List and Program Records.   . . . . . . . . . . . . . . . . . .    84
FAILURE TO APPROVE THE PROPOSALS  . . . . . . . . . . . . . . . . . . . . . . . . . . .    84
CONSENT PROCEDURES  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    85
     Written Consent and Vote Required  . . . . . . . . . . . . . . . . . . . . . . . .    85
     Consent Tabulation   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    85
     Expiration of Exchange Offer   . . . . . . . . . . . . . . . . . . . . . . . . . .    85
     Amount Tendered  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    85
     Revocability of Tenders  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    85
     Solicitation of Letters of Transmittal   . . . . . . . . . . . . . . . . . . . . .    86
     Acceptance of Tenders  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    86
     Special Requirements for Certain Investors   . . . . . . . . . . . . . . . . . . .    86
     Representations and Covenants  . . . . . . . . . . . . . . . . . . . . . . . . . .    87
     Validity of Tenders  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    87
     Payments of Fees and Expenses  . . . . . . . . . . . . . . . . . . . . . . . . . .    87
     Compliance with Tender Offer Practices   . . . . . . . . . . . . . . . . . . . . .    88
CERTAIN FEDERAL TAX CONSEQUENCES  . . . . . . . . . . . . . . . . . . . . . . . . . . .    89
     Tax Consequences of the Exchange   . . . . . . . . . . . . . . . . . . . . . . . .    89
     Realization of Suspended Passive Losses  . . . . . . . . . . . . . . . . . . . . .    90
     Basis in Stock and Warrants  . . . . . . . . . . . . . . . . . . . . . . . . . . .    90
COMPARATIVE RIGHTS OF SECURITY HOLDERS  . . . . . . . . . . . . . . . . . . . . . . . .    91
UNAUDITED PRO FORMA FINANCIAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . .    99
INFORMATION CONCERNING BENTON . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   106
</TABLE>


                                       iv
<PAGE>   12
<TABLE>
<S>                                                                                       <C>
     Business   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   106
     Recent Events  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   112
</TABLE>



                                       v
<PAGE>   13
   
<TABLE>
<S>                                                                                       <C>
INFORMATION CONCERNING 1989 - 1 PARTNERSHIP . . . . . . . . . . . . . . . . . . . . . .   113
     General  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   113
     Description of Oil and Gas Properties  . . . . . . . . . . . . . . . . . . . . . .   113
     Management's Discussion and Analysis of Financial
         Condition and Results of Operations  . . . . . . . . . . . . . . . . . . . . .   116
INFORMATION CONCERNING 1990 - 1 PARTNERSHIP . . . . . . . . . . . . . . . . . . . . . .   118
     General  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   118
     Description of Oil and Gas Properties  . . . . . . . . . . . . . . . . . . . . . .   119
     Selected Historical Financial Data   . . . . . . . . . . . . . . . . . . . . . . .   120
     Management's Discussion and Analysis of Financial
         Condition and Results of Operations  . . . . . . . . . . . . . . . . . . . . .   123
INFORMATION CONCERNING 1991 - 1 PARTNERSHIP . . . . . . . . . . . . . . . . . . . . . .   126
     General  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   126
     Description of Oil and Gas Properties  . . . . . . . . . . . . . . . . . . . . . .   126
     Selected Historical Financial Data   . . . . . . . . . . . . . . . . . . . . . . .   127
     Management's Discussion and Analysis of Financial
         Condition and Results of Operations  . . . . . . . . . . . . . . . . . . . . .   129
DESCRIPTION OF SECURITIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   132
LEGAL MATTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   133
EXPERTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   133
GLOSSARY  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   134

INDEX TO FINANCIAL STATEMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   F-1
</TABLE>
    

   
EXHIBITS
- --------

EXHIBIT A        Form of Warrant Agreement

EXHIBIT B        Reports of Huddleston & Co., Inc. Related to Estimated Reserves
                 and Revenues of the Partnerships

EXHIBIT C        Description of the Proposals

EXHIBIT D        Letters of Transmittal

EXHIBIT E        California Dissenters' Rights Statute
    


                                       vi
<PAGE>   14
                                    SUMMARY
   
         The following is a summary of certain information  contained  elsewhere
in this Prospectus.  This summary is not intended to be a complete  description
of the matters  covered in this  Prospectus  and is subject to and  qualified in
its entirety by reference to the more  detailed  information  and  financial
statements  contained  elsewhere in this Prospectus,  including the Supplement
and Exhibits hereto and the documents  incorporated herein by reference.
Investors are urged to read carefully the entire Prospectus, including  the
Supplement  and  Exhibits.   See  Glossary  included  elsewhere  in  this
Prospectus  for definitions of certain oil and gas terms.
    

                    RISK FACTORS AND MATERIAL CONSIDERATIONS
   
         The Exchange Offer. In addition to the information included in this
Prospectus, the Investors should carefully consider the following factors in
determining whether to accept the Exchange Offer and consent to the Proposal.
The risks and effects of the Exchange will not be different for Investors based
solely upon the Partnership in which he has invested. The risk factors
summarized below are described in further detail elsewhere in this Prospectus
at "Risk Factors and Material Considerations," beginning at page 34.
    

         Lack of Arm's Length Negotiations and Uncertainties in the Method of
         Determining Exchange Values. The Exchange Values were determined by
         Benton, based in part on an offer for the purchase of substantially all
         of the assets of the Partnerships from an unaffiliated third party, but
         may not reflect the actual value of the net assets of the respective
         Partnerships. The primary assets of each of the Partnerships considered
         by Benton when determining the Exchange Value were the proved oil and
         gas reserves of that Partnership (the "Proved Reserves") and the
         present value of associated future net cash flow as of December 31,
         1994, as well as the offer to purchase the Umbrella Point Field,
         described herein. There are many uncertainties inherent in estimating
         quantities of Proved Reserves, and the present value attributed to each
         Partnership's Proved Reserves may be less than the future net cash
         flows actually received from that Partnership's interest in its wells.
         In that event, the use of this valuation methodology will have resulted
         in an undervaluation of the Partnership Units. See "Method of
         Determining Exchange Values."

         Potential Decline in Market Price of Common Stock. Access to an active
         trading market by exchanging Investors may result in a relatively large
         number of shares of Common Stock offered for sale immediately after the
         Closing Date. This may tend to lower the market price for the Common
         Stock. Future market conditions in the oil and gas industry in general
         or the effect of the conditions on Benton in particular could also
         adversely affect the market price of the Common Stock and thus the
         value of the Warrants. There can be no assurance regarding the
         potential appreciation in the market price of the Common Stock. Any
         decline in the market price of the Common Stock could reduce the
         Investor's return on investment or increase the loss on the Investor's
         original investment.
   
         Potential Benefits of Alternatives to the Exchange. The alternatives to
         the Exchange Offer are the continuation of the Partnerships or the
         liquidation of the Partnerships' assets and distribution of the
         liquidation proceeds to Investors, either of which could potentially be
         more beneficial to Investors than the Exchange by avoiding the risks
         associated with ownership of Benton Common Stock and, in the case of a
         liquidation of the Partnerships, by providing an immediate cash return
    


                                       1
<PAGE>   15
         to Investors. See "Recommendation of the Managing General
         Partner--Managing General Partner's Reasons for Proposing the Exchange
         Offer," "--Managing General Partner's Determination that the Exchange
         Offer is Fair," and "--Alternatives to the Exchange."

         Lack of Independent Representatives for Investors; No Fairness Opinion.
         No independent representative was selected or hired to represent the
         interests of the Investors in negotiating the terms of the Exchange
         Offer. The Exchange Values and other terms of the Exchange Offer may
         therefore be inferior to those that could have been negotiated by an
         independent representative. Benton did not retain an independent third
         party to render an opinion regarding the fairness of the terms of the
         Exchange Offer to the Investors.
   
         Limited Dissenters' Rights. Investors who are California residents and
         who oppose the Proposal will have limited dissenters' rights. Other
         Investors who oppose the Proposal will have no dissenters' rights or
         appraisal rights, and therefore, no option to receive cash based on a
         separate appraisal of the Partnership assets in lieu of the Common
         Stock and Warrants based on the Exchange Values determined by Benton.
         The Managing General Partner could have provided all Investors with
         appraisal rights in structuring the Exchange Offer but elected not to
         do so, primarily because such rights are not provided for in the
         Partnership Agreements. The absence of these rights limit the options
         that would otherwise be available to Investors opposing the Exchange
         Offer.

         Effect on Dissenters' Rights on California Investors. Investors
         residing in California will be afforded limited dissenters' rights in
         accordance with the requirements for roll-up transactions under the
         California Code. By voting against the Proposal, Investors in the State
         of California will be deemed to exercise their dissenters' rights and
         will receive the number of shares of Common Stock and Warrants equal to
         the Exchange Value of their interests divided by the closing price of
         the Common Stock on the NASDAQ-NMS during the twenty days immediately
         after the Closing Date. If that average price is lower than the
         Exchange Price, dissenting California Investors will receive more
         shares of Common Stock and Warrants than they would otherwise receive
         in the Exchange Offer. If, however, the average price is higher than
         the Exchange Price, a dissenting Investor would receive fewer shares of
         Common Stock and Warrants. California Investors hold a substantial
         portion of the interests in the 1989-1 Partnership, the 1990-1
         Partnership and the 1991-1 Partnership, and the impact of the exercise
         of dissenters' rights could materially increase or decrease the number
         of shares of Common Stock issued by Benton in connection with the
         Exchange Offer.

         Conflicts of Interest of Benton. Benton is the Managing General Partner
         of each of the Partnerships and its determination of the Exchange
         Values involves an inherent conflict of interest. As Managing General
         Partner, Benton owes fiduciary duties to the Investors in the
         Partnerships. In addition, it owes a duty to its stockholders. While
         Benton believes that it has fulfilled these obligations in its
         determination of the Exchange Values, which is supported, in part, by a
         reserve report audited by an independent petroleum engineer, no degree
         of objectivity or professional competence can eliminate the inherent
         conflict of interest. See "Recommendation of the Managing General
         Partner--Fiduciary Duties of Benton."
    
         Benton Dividend Policy. Benton's policy is to retain its earnings to
         support the growth of Benton's business. Accordingly, the Board of
         Directors of Benton has never declared cash dividends on its Common
         Stock and does not plan to do so in the foreseeable future.


                                       2
<PAGE>   16
         Furthermore, the terms of Benton's debt agreements prohibit Benton from
         paying cash dividends on its Common Stock. Thus, upon consummation of
         the Exchange, Investors will no longer receive cash distributions and
         it is unlikely that cash dividends will be paid on the Benton Common
         Stock at any time in the foreseeable future.

         No Fractional Shares. No fractional shares will be issued in connection
         with the Exchange Offer. An Investor who would otherwise be entitled to
         a fractional share of Common Stock will be paid cash in lieu of such
         fractional shares. Warrants issued in connection with the Exchange
         Offer will be rounded to the nearest whole number of Warrants and no
         fractional interest will be issued.

         Risks Associated with Ownership of Common Stock of Benton. In addition
to the information included in this Prospectus, the Investors should carefully
consider the following factors related to Benton in determining whether to
accept the Exchange Offer. The risk factors summarized below are described in
further detail elsewhere in this Prospectus at "Risk Factors and Material
Considerations."

         Losses From Benton's Operations. The historical financial data for
         Benton reflects net losses and decreased revenues for the years ended
         December 31, 1992 and 1993. Benton's ability to maintain its financing
         arrangements, produce its oil and gas reserves and service its debt
         obligations would be adversely affected by a lack of profitability.

         Foreign Operations. Almost all of Benton's oil and gas revenues and
         Proved Reserves are attributable to its operations in Venezuela and
         Russia. Benton's Venezuelan and Russian operations are subject to
         political, economic and other uncertainties inherent in the development
         of foreign properties.

         Properties Under Development. A substantial amount of Benton's Proved
         Reserves are undeveloped and require development activities and/or are
         proved developed behind-pipe or shut-in and require additional
         development activities. As a result, Benton will require substantial
         capital expenditures to develop all of its Proved Reserves.

         Engineers' Estimates of Reserves and Future Net Revenue. This
         Prospectus contains, and incorporates by reference, estimates of
         Benton's and the Partnerships' oil and gas reserves and future net
         revenues therefrom. Estimates of commercially recoverable oil and gas
         and the future net cash flows derived therefrom are based upon a number
         of variable factors and assumptions. Estimates to some degree are
         speculative and estimates of the commercially recoverable reserves of
         oil and natural gas, and the future net cash flows therefrom, prepared
         by different engineers or by the same engineer at different times, may
         vary substantially. The difficulty of making precise estimates is
         accentuated because most of Benton's Proved Reserves were non-producing
         at December 31, 1994.

         Development of Additional Reserves. Benton's future success may also
         depend upon its ability to find or acquire additional oil and gas
         reserves that are economically recoverable. There can be no assurance
         that Benton will be able to discover additional commercial quantities
         of oil and gas, or that Benton will be able to continue to acquire
         interests in underdeveloped oil and gas fields and enhance production
         and reserves therefrom.

         Partnership Litigation. Certain limited partners in Benton's oil and
         gas limited partnerships, including the Partnerships that are the
         subject of this Exchange Offer, filed suit against Benton


                                       3
<PAGE>   17
         and others alleging breaches of contract, fiduciary duty and fraud.
         This suit has been voluntarily dismissed, subject to an agreement among
         the parties to arbitrate the issues and claims which were the subject
         of the claim. See "The Exchange Offer and Proposal--Litigation and
         Related Matters."

         In addition, Investors in partnerships which were sponsored by a third
         party have sued Benton on the theory that since it provided oil and gas
         drilling prospects to those partnerships and operated substantially all
         of their properties, it was responsible for alleged violations of
         securities laws in connection with the offer and sale of interests,
         contractual breach of fiduciary duty and fraud. See "The Exchange Offer
         and Proposal--Litigation and Related Matters."

         Retention and Attraction of Key Personnel. Benton depends to a large
         extent on the abilities and continued participation of certain key
         employees, the loss of whose services could have a material adverse
         effect on Benton's business.

         Regulation. The oil and gas industry is subject to broad and frequently
         changing regulations that could adversely affect the operations of
         Benton.

         In spite of the foregoing risks, Benton initiated and proposed the
Exchange Offer and recommends adoption of the Proposals by each of the
Partnerships to enable Benton to acquire the assets and liabilities of each of
the Partnerships and to provide Investors with the potential benefits summarized
below under the caption "Reasons for the Exchange Offer; Recommendation of the
Managing General Partner."

   
                                  THE PARTIES
    
   

BENTON OIL AND GAS COMPANY
    

   
         Benton Oil and Gas Company is primarily engaged in the development and
production of oil and gas properties. The Company's operations are focused on
the eastern region of Venezuela, the Gulf Coast region of Louisiana and the West
Siberia region of Russia. Benton's business strategy is to seek new reserves in
areas of low geologic risk and to exploit underdeveloped existing oil and gas
fields. The Company implements the exploitation strategy through the in-house
design and interpretation of 3-D seismic surveys and through workovers,
recompletions, redrilling and exploration and development drilling.
    

   
         Internationally, the Company seeks projects with significant reserve
potential in areas with low geologic risk and known proved reserves where, in
certain situations, the Company can add value by employing modern exploration,
drilling, completion and production techniques. To reduce risk, control costs,
and facilitate local transactions, the Company has formed ventures with local
foreign partners.
    

   
         Domestically, the Company integrates 3-D seismic technology with
subsurface geologic data from previously drilled wells. This geophysical
evaluation enables the Company to discover previously undetected reserves in
existing fields. The Company believes that it enjoys a competitive advantage in
finding and developing reserves on an economic basis because of its
concentration on 3-D seismic technology, the training and qualifications of its
in-house technical team and the practical experience and knowledge which this
team has acquired over past years. The Company's recognized technical expertise
has afforded it access to projects it otherwise would not have enjoyed.
    


                                       4
<PAGE>   18
   
         In the ordinary course of its business, the Company continues to
evaluate acquisition, joint venture and other opportunities that would enable it
to further its business strategy.
    

   
         Benton was incorporated in Delaware in September 1988. Its principal
executive offices are located at 1145 Eugenia Place, Suite 200, Carpinteria,
California 93013 and its telephone number is (805) 566-5600. See "Summary --
Certain Historical and Pro Forma Financial Data" and "Information Concerning
Benton" for a more detailed discussion of Benton.
    

   
1989-1 PARTNERSHIP
    
   

         Benton Oil & Gas Combination Partnership 1989-1, L.P., a California
limited partnership, was formed September 1, 1989 to explore for oil and gas,
acquire undeveloped leases and Proven Producing Properties and other interests,
drill wells, recomplete existing wells and conduct all other operations relating
to the exploration, production and sale of oil and gas.
    

   
         Benton Oil and Gas Company is the Managing General Partner of the
1989-1 Partnership. The principal executive offices of the Managing General
Partner and the 1989-1 Partnership are located at 1145 Eugenia Place, Suite 200,
Carpinteria, California 93013; telephone number: (805) 566-5600.
    

   
1990-1 PARTNERSHIP
    
   

         Benton Oil & Gas Combination Partnership 1990-1, L.P., a California
limited partnership, was formed November 29, 1990 to explore for oil and gas,
acquire undeveloped leases and Proven Producing Properties and other interests,
drill wells, recomplete existing wells and conduct all other operations relating
to the exploration, production and sale of oil and gas.
    

   
         Benton Oil and Gas Company is the Managing General Partner of the
1990-1 Partnership The principal executive offices of the Managing General
Partner and the 1990-1 Partnership are located at 1145 Eugenia Place, Suite 200,
Carpinteria, California 93013; telephone number: (805) 566-5600.
    

   
1991-1 PARTNERSHIP
    
   

         Benton Oil & Gas Combination Partnership 1991-1, L.P., a California
limited partnership, was formed July 30, 1991 to explore for oil and gas,
acquire undeveloped leases and Proven Producing Properties and other interests,
drill wells, recomplete existing wells and conduct all other operations relating
to the exploration, production and sale of oil and gas.
    

   
         Benton Oil and Gas Company is the Managing General Partner of the
1991-1 Partnership The principal executive offices of the Managing General
Partner and the 1991-1 Partnership are located at 1145 Eugenia Place, Suite 200,
Carpinteria, California 93013; telephone number: (805) 566-5600.
    


                                       5
<PAGE>   19
                        THE EXCHANGE OFFER AND PROPOSALS

   

         Benton is offering to exchange Common Stock and Warrants for
Partnership Units in the 1989-1 Partnership, the 1990-1 Partnership and the
1991-1 Partnership (the "Exchange"). Investors who tender their Partnership
Units will receive the number of shares of Common Stock and Warrants set forth
herein in exchange for the Partnership Units. See "The Exchange Offer and
Proposal" and "Method of Determining Exchange Values." In connection with the
Exchange Offer, Benton is submitting Proposals to Investors in each of the
Partnerships (the 1989-1 Proposal, the 1990-1 Proposal and the 1991-1 Proposal
referred to collectively herein as the "Proposals") to amend the respective
Partnership Agreements to provide for the transfer of all of the assets and
liabilities of the Partnerships to Benton as of the December 31, 1994 Effective
Date in exchange for Common Stock and Warrants in the amounts set forth below
and the pro rata distribution of such consideration in liquidation of the
Partnership. Each Investor who tenders his Partnership Units pursuant to the
Exchange Offer will, by that tender, consent to the Proposal. If a Partnership
adopts the Proposal by the consent of 75% of the Partnership Units, all
Investors in that Partnership, whether or not they tendered their Units in the
Exchange Offer, will receive the same amount of Common Stock and Warrants they
would have received had they tendered their Partnership Units. CONSUMMATION OF
THE EXCHANGE OFFER FOR A PARTNERSHIP IS CONDITIONED UPON APPROVAL BY THAT
PARTNERSHIP OF THE PROPOSAL. APPROVAL OF THE PROPOSAL AND ADOPTION OF THE
EXCHANGE OFFER IS NOT CONDITIONED UPON APPROVAL AND ACCEPTANCE BY ANY OTHER
PARTNERSHIP. See "The Exchange Offer and Proposal." Holders of Units in the
Partnerships who elect to accept the Exchange Offer may choose to accept cash in
lieu of the Common Stock to be issued, BUT CASH WILL BE DISTRIBUTED TO THE
HOLDER ONLY IF THE SALE OF THE UMBRELLA POINT FIELD TO GOLDKING TRINITY BAY
CORP. ("GOLDKING"), AS DESCRIBED HEREIN, IS ACTUALLY CONSUMMATED. A holder
should make a decision to accept the Exchange Offer based solely upon an
investment decision in the Common Stock, because there can be no assurance from
Benton that the Goldking sale will be consummated. See "The Exchange Offer and
Proposal--Election to Receive Cash in Lieu of Common Stock" and "Consent
Procedures--Solicitation of Letters of Transmittal."
    

   
         Common Stock issued in the Exchange will be freely transferable
immediately following issuance. There will be no market for the Warrants. The
Exchange Offer may be withdrawn if Benton determines, in the exercise of
reasonable judgment, that a material change affecting the Partnerships or the
Company has occurred. See "The Exchange Offer and Proposal."
    

   
         For a detailed description of Benton's determination of the Total
Exchange Values for each of the Partnerships, see "Method of Determining
Exchange Values."
    

                              DISSENTERS' RIGHTS
        
         Investors residing in states other than California will not be afforded
any dissenters' or appraisal rights. Under the rules adopted by the National
Association of Securities Dealers, Inc. ("NASD"), Investors in roll-up
transactions such as the Exchange Offer are entitled to certain dissenters'
rights unless the sponsor adopts a 75% approval requirement for the transaction
or other procedures designed to protect the rights of Investors. Although
adoption of the Proposals by each of the Partnerships would require the consent
under the Partnership Agreements of the holders of only a majority of the
Partnership Units, the Managing General Partner has adopted a 75% approval
procedure instead of providing dissenters' rights.
    


                                       6
<PAGE>   20
   
         Investors residing in California will be afforded limited dissenters'
rights in accordance with the requirements for roll-up transactions under the
California Code. By voting against the Proposal, Investors in the State of
California will be deemed to exercise their dissenters' rights and will receive
the number of shares of Common Stock and Warrants equal to the Exchange Value of
their interests divided by the closing price of the Common Stock on the
NASDAQ-NMS during the twenty days immediately after the Closing Date. If that
average price is lower than the Exchange Price, dissenting California Investors
will receive more shares of Common Stock and Warrants than they would otherwise
receive in the Exchange Offer. If, however, the average price is higher than the
Exchange Price, a dissenting Investor would receive fewer shares of Common Stock
and Warrants. California Investors hold a substantial portion of the interests
in the 1989-1 Partnership, the 1990-1 Partnership and the 1991-1 Partnership and
the impact of the exercise of dissenters' rights could materially increase or
decrease the number of shares of Common Stock issued by Benton in connection
with the Exchange Offer. See Exhibit E for a copy of the California Statute.
    


                  BACKGROUND AND ALTERNATIVES TO THE EXCHANGE

         Background. Each of the Partnerships has completed its respective
drilling operations and acquisitions. Benton has received inquiries and concerns
from Investors and determined that the Partnerships had each reached the stage
in its production history where consideration of the Exchange Offer became
appropriate. That determination was based on the following factors:

     -   Production Declines. Since 1993, the Partnerships' oil production
         volumes have declined from peak levels reached in 1992. Gas production
         began to decline in 1993 and 1994. These reductions are due to the
         natural decline occurring in the Umbrella Point Field, the
         Partnerships' most significant asset. Production volumes are expected
         to decline further in subsequent periods due to ongoing depletion of
         the Partnerships' wells. The decline in production rates due to
         depletion of reserves is neither unusual nor unexpected in the oil and
         gas industry.

     -   Declining Distribution Rates. The Partnerships' production declines
         commencing in 1993 and 1994 contributed to the Partnerships' declining
         distribution rates in 1993 and 1994.

     -   Partnership Litigation. Litigation, in the form of arbitration, has
         been instituted against Benton by certain Investors in the Partnerships
         which are the subject of this Exchange Offer. The claims made by the
         Investors have not been clearly  defined. However, in general terms,
         the Investors allege that the Company failed to comply with the
         requirements of the Partnership Agreements with respect to the reports
         to be sent to individual partners, including audited financial
         statements and reserve reports, commingling of funds, breach of its
         fiduciary duties, fraudulent inducement to invest, conversion and
         negligent representation. The Company intends to vigorously defend its
         actions related to these Partnerships. However, the Company does
         believe that it is in its best interest and the best interests of the
         partners to resolve these issues, as it relates to the  Partnerships,
         and to terminate the Partnerships on the terms set forth herein. The
         Company anticipates that if the Exchange Offer is approved, this will
         lessen the chance of additional litigation with respect to the
         Partnerships and may limit the potential damages with respect to the
         existing arbitration.


                                       7
<PAGE>   21
   
     -   Benton's Acquisition of the Partnership Properties. Although Benton
         has executed agreements for the sale of each of the Partnership's
         respective interests in the Umbrella Point Field, which constitutes
         substantially all of the assets of the Partnerships, there can be no
         assurance that the contemplated sale will be consummated. Benton has
         made the Exchange Offer to acquire the assets of these Partnerships
         approving the Proposals, and then intends to sell the Umbrella Point
         Field to Goldking on the terms described herein. Benton is a logical
         purchaser for various reasons, including Benton's (i) interest in
         reducing the overhead involved in administration of the Partnerships as
         Managing General Partner, (ii) greater diversification and capital
         resources enabling Benton to fund liabilities and expenses necessary
         for the full development of the Partnerships' properties (iii) interest
         in responding to the Investor's concerns about the future prospects of
         the Partnerships, since many of the Investors are also stockholders of
         Benton, and (iv) ability to assume the risk that the sale to Goldking
         will not be consummated. Although the acquisition of the Partnership's
         assets pursuant to the Exchange Offer will result in a charge against
         Benton's income, Benton does not expect that this one time charge will
         have a significant adverse affect on the market value of the Benton
         Common Stock.
    

Alternatives to the Exchange. Although Benton has considered the continuation of
the Partnerships or liquidation of the Partnerships as potential alternatives to
the Exchange Offer, these alternatives were rejected for various reasons,
including the following:

   
     -   Solicitation of Offers to Purchase Partnership Properties; Goldking
         Purchase Offer. Benton has solicited bidders for the purchase of assets
         of each of the Partnerships. See "Background of Exchange Offer -
         Goldking Offer." The interest in purchasing the assets of the
         Partnerships was limited. In June 1995, Benton received an offer from
         Goldking Trinity Bay Corp. ("Goldking") to purchase all of the right,
         title and interest owned by each of the Partnerships and Benton in the
         Umbrella Point Field. The financing of the Goldking acquisition was
         subject to the ability of Goldking to acquire at least 75% of the
         working interests in the Field, and therefore, to preserve the offer
         for the Partnerships, Benton sold its corporate interest in the
         Umbrella Point Field (11.77% working interest) to Goldking for
         $756,872. Benton entered into agreements, on behalf of each of the
         Partnerships, with Goldking for the sale of the Partnerships' interests
         in the Umbrella Point Field, subject to approval of the Partnerships.
         In consideration of the sale, the 1989-1 Partnership, the 1990-1
         Partnership and the 1991-1 Partnership would receive anticipated net
         proceeds in the aggregate of $323,296, $930,865 and $185,282,
         respectively, in addition to the earnest money deposits which have been
         paid by Goldking to the 1989-1 Partnership, the 1990-1 Partnership and
         the 1991-1 Partnership in the amount of $4,929, $14,192 and $2,824,
         respectively (the "Deposit"), if the sale were consummated as of June
         30, 1995. The agreements with Goldking are not contingent upon each of
         the Partnerships approving the transaction. Benton has not recommended
         to the Investors a direct sale by the Partnerships of their interests
         in the Umbrella Point Field to Goldking since the sale of these assets
         would result in dissolution of the Partnerships pursuant to the
         respective Partnership Agreements. As discussed herein, Benton has
         attributed value to certain General Intangibles (as defined herein) to
         induce Investors to accept the Exchange Offer, which increases the
         Total Exchange Value attributed to the Partnerships. Benton believes
         that it is in the best interest of the Investors of each of the
         Partnerships to accept the Exchange Offer, which pursuant to Benton's
         method of determining the Total Exchange Value, will provide
         consideration in excess of the cash distribution an Investor would have
         received from the sale of the Partnership assets to Goldking. If the
         Exchange Offer and Proposal for the Partnerships are approved, Benton
         intends to sell the working interest in the Umbrella Point Field for
         each approving Partnership to Goldking, on the terms and for the
         consideration offered by Goldking to the Partnerships. Thus, if

    

                                       8
<PAGE>   22
   
         all three of the Partnerships accept the Exchange Offer and consent to
         the Proposal, Benton will receive an aggregate of approximately
         $1,439,443 in cash from Goldking for the sale of the Partnerships'
         assets, subject to adjustment, and the Investors in the 1989-1
         Partnership, the 1990-1 Partnership and the 1991-1 Partnership would
         receive total consideration valued at $370,098, $2,990,728 and
         $692,349, respectively.
    

   

         In evaluating the terms of the Goldking Offer, Benton analyzed the
         estimated value of each of the Partnerships' proved reserves and other
         assets. The Goldking purchase offer represents 99.3%, 88.1% and 88.0%
         of the total discounted future net cash flows for the proved reserves
         of the 1989-1 Partnership, the 1990-1 Partnership and the 1991-1
         Partnership, respectively. Benton entered into the purchase agreements
         with Goldking in order to preserve the Investors' ability to sell the
         Partnership assets to Goldking at a price Benton believes is favorable
         to the Partnerships.
    

   
         Benton has proposed the Exchange Offer, contemplating the sale of the
         Partnership assets to Goldking on the terms described above, allowing
         Investors to receive the favorable consideration offered by Goldking
         for the purchase of the primary asset of each of the Partnerships, and
         receive value for other assets and General Intangibles of the
         Partnerships which would not be valued or provide little if any
         consideration in liquidation. If the Goldking sale is consummated, an
         Investor who accepts the Exchange Offer may elect to receive cash in
         lieu of Benton Common Stock in the amount set forth herein, providing
         an Investor with cash he or she would have received for the sale of the
         Partnership assets, with additional consideration in the form of
         Warrants to induce Investors to accept the Exchange Offer. See "The
         Exchange Offer and Proposal - Election to Receive Cash in Lieu of
         Common Stock."
    

   
         In addition to the Goldking offer, Benton received an offer to purchase
         the working interests owned by each of the Partnerships and Benton in
         the Umbrella Point Field from Hunter Resources, Inc. ("Hunter") in
         October 1994. Pursuant to the terms of that offer, Hunter would have
         paid a total of $8,000,000 in cash and $1,000,000 in the form of a
         promissory note, compared to Goldking's offer of $7,650,000 in cash.
         Both offers were for the working interests in the Umbrella Point Field
         owned by each of the Partnerships and the 11.77% working interest owned
         by Benton.
    

   
         Benton compared the Hunter offer, the Goldking offer and the estimated
         value of the Umbrella Point Field proved reserves at December 31, 1994
         (see table below). In the case of all three Partnerships, the Hunter
         offer and the Goldking offer were in excess of the value of the proved
         reserves of the Umbrella Point Field. Hunter was unable to secure
         financing for the transaction and subsequently withdrew its offer. Due
         to Hunter's inability to secure financing for the purchase and the
         extent to which such offer exceeded the value of the Partnerships'
         proved reserves, Benton concluded that Hunter's offer was in excess of
         the market value of the Umbrella Point Field. When analyzing and
         considering the Goldking offer, Benton concluded that the purchase
         price offered by Goldking was in excess of the value of the
         Partnerships' proved reserves and, although less than the Hunter offer,
         represented a favorable market value for the property.
    


                                       9
<PAGE>   23

<TABLE>
<CAPTION>
                                                                     UMBRELLA
                                                                      POINT
                                                                      FIELD
                        HUNTER OFFER(1)         GOLDKING              PROVED
PARTNERSHIP             (CASH & NOTES)          OFFER(1)            RESERVES(2)
- -----------             --------------          --------            -----------
<S>                     <C>                    <C>                  <C>
   1989-1                 $  443,602           $  377,062            $325,540

   1990-1                  1,277,264            1,085,674             937,429

   1991-1                    254,228              216,093             186,589
</TABLE>
- ------------------

   
        (1)     Prior to any adjustments for revenues and expenses subsequent to
                the effective date of sale, which in the case of Goldking is
                January 1, 1995. These adjustments, through June 30, 1995, are
                the reason for the differences in Goldking proceeds listed in
                this table as compared to other places in the document. The
                adjustments were omitted from this table for comparative
                purposes.
    

   

        (2)     Value of estimated future net cash flows from Proved Reserves of
                the Umbrella Point Field, as of December 31, 1994, as reflected
                in the reserve report for the Partnership as of that date.
    

   
         Although several other companies reviewed reserve information,
         production records and well data, no other serious inquiries were
         received by Benton for the purchase of the Partnerships' assets and
         Benton believes that no offer to purchase the assets of the
         Partnerships will be in excess of the Total Exchange Values.
    

   
    -    Continuation  of the  Partnerships.  Continuation of the  Partnerships,
         while avoiding the risks associated with the Exchange Offer and the
         discontinuance of cash  distributions,  would result in declining
         operating  results and  distribution  rates for each of the
         Partnerships  because:  (i) reserves  will be depleted  in the ordinary
         course from  ongoing  production,  (ii)  general and administrative
         expenses  will  remain  the  same  regardless  of  the  operating
         results  of the Partnership  assets,  and (iii) the  Partnership  would
         have to incur  the cost of  plugging  and abandoning  Partnership wells
         when they become uneconomic or any future sale of the Partnership's
         wells  would  be at a price  which  would  reflect  the  anticipated
         costs of such  plugging  and abandonment expenses.
    

   
    -    Liquidation of the Partnerships. Benton has undertaken an analysis of
         the current liquidation value of each of the Partnerships. Results of
         that liquidation analysis reflect liquidation values per Unit for the
         1989-1 Partnership, the 1990-1 Partnership and the 1991-1 Partnership
         estimated at $1,045, $742 and $855, respectively, or approximately 20%,
         65% and 65%, respectively, less than the Total Exchange Values.
    

   
         Benton's liquidation analysis for each of the Partnerships is based
         upon Benton's estimate of cash proceeds that would be received by the
         Partnership on liquidating the assets of such Partnership. The
         liquidation values are supported by the offers to purchase the assets
         of the Partnerships, discussed above. Since Benton has solicited
         bidders for purchase of the assets of the Partnerships, it believes
         that liquidation of the Partnership assets would result in limited
         interest for those assets, and would likely result in valuations below
         the Total Exchange Values of the Partnership

    

                                       10
<PAGE>   24
   
         Units. In view of the results of the liquidation analysis, Benton
         rejected the alternative of liquidation and has made the Exchange Offer
         to holders of Units in the Partnerships.
    

 REASONS FOR THE EXCHANGE OFFER; RECOMMENDATION OF THE MANAGING GENERAL PARTNER

   
         The Managing General Partner recommends that the Investors in each of
the Partnerships consent to the Proposal and accept the Exchange Offer. See
"Background of Exchange Offer". This recommendation is based on a number of
factors summarized below. See "Recommendation of the Managing General Partner"
for additional information.
    

         In considering the Exchange, the Managing General Partner took into
account various advantages and disadvantages of the Exchange to each of the
Partnerships and its respective Investors. The advantages the Managing General
Partner considered included:

   
         (a) The Managing General Partner has reviewed the financial condition,
results of operations and cash flows of Benton and each of the Partnerships, on
a historical and a prospective basis. The Managing General Partners' analysis of
the future prospects for each of the Partnerships indicates declining
distributions to the investors. See "Recommendation of Managing General Partner
Managing General Partner's Determination that Exchange Offer is Fair". For the
years ended December 31, 1992, 1993 and 1994 and the six months ended June 30,
1994 and 1995, Benton had total revenues of $8,622,000, $7,504,000, $34,705,000,
$12,160,000 and $25,870,000, respectively. For the years ended December 31, 1992
and 1993, Benton had a net loss of $2,909,000 and $4,829,000, respectively,
compared to net income of $2,954,000 for the year ended December 31, 1994 and
net income of $2,000 and $3,152,000 for the six months ended June 30, 1994 and
1995, respectively. The Managing General Partner has concluded that Benton's
ability to access additional capital and its more diverse operations and oil and
gas prospects in Venezuela, the Gulf Coast and Russia could continue to
contribute to significant increases in Benton's results of operations and cash
flow, while the Partnerships each have a short remaining economic life.
    
   
         (b) The Managing General Partner considered the potential growth rate
and market price to earnings potential of Benton. The Managing General Partner's
analysis of continuation of the Partnerships indicate that distributions are
likely to decrease rapidly over the short economic life of the Partnerships. The
Managing General Partner determined that the Investors will receive the benefit
of any future growth in the value of their equity interest in Benton which will
be more beneficial to the Investors than receiving cash distributions from the
Partnerships through continuation for the Partnerships' economic lives. In
addition, distributions to the Investors in connection with the Exchange Offer
allow for distributions undiminished by ongoing Partnership plugging costs,
which the Managing General Partner estimates through the life of the
Partnerships to be $247, $160 and $56 per unit for the 1989-1 Partnership, the
1990-1 Partnership and the 1991-1 Partnership, respectively.

         (c) The Common Stock of Benton has an active trading market on NASDAQ
National Market. This active trading market provides some liquidity to the
Investors. The Partnership Units have no liquidity, and the Partnership
Agreement restricts transfer of the Partnership Units. The Warrants that will be
received in the Exchange Offer do not currently have a public trading market.

         (d) If the sale of the Umbrella Point Field to Goldking is consummated,
Investors who accept the Exchange Offer may choose to receive cash in lieu of
Common Stock of Benton, and will receive Warrants in the amounts set forth
herein. This option allows an Investor to receive cash in an amount equal to
that which would be received if the Investors sold the assets of the Partnership
to
    

                                       11
<PAGE>   25
   
Goldking, and would allow the Investor to also receive additional consideration
in the form of Warrants with a value equal to the General Intangibles of the
Partnership, as described in further detail herein. CASH WILL BE DISTRIBUTED
ONLY TO THOSE INVESTORS WHO CHOOSE TO RECEIVE CASH IN LIEU OF COMMON STOCK BY
MAKING THE APPROPRIATE ELECTION IN THE LETTER OF TRANSMITTAL, ATTACHED HERETO AS
EXHIBIT D, AND ONLY IF THE SALE OF THE UMBRELLA POINT FIELD TO GOLDKING IS
CONSUMMATED FOR SUCH PARTNERSHIP. See "The Exchange Offer and Proposal -
Election to Receive Cash In Lieu of Common Stock" and "Consent Procedures
Solicitation of Letters of Transmittal."
    

             The Managing General Partner also considered certain disadvantages
that included:
   
         (a) There are many uncertainties and risks inherent in the oil and gas
industry. The Managing General Partner considered the possibilities that changes
in the industry and continued volatility of oil and gas prices could have a
significantly greater effect on the Partnership due to the Partnership's size
compared to Benton and the greater diversification of oil and gas properties and
prospects of Benton. However, the Managing General Partner also considered that
increases in the price of oil and gas could have a more direct effect to the
Investors if the Partnership assets were owned by the Partnership rather than
Benton due to the size of the Partnership, the cash distributions to the
Investors from the Partnerships and the percentage ownership in the Partnership
of each of the Investors. However, Benton believes that an increase in oil and
gas prices could generally increase revenues of Benton and could result in a
corresponding increase in the market price of Benton Common Stock.
    
   
         (b) Benton is restricted under certain credit agreements from paying
cash dividends to its stockholders and the Investors could continue to receive
cash distributions from the Partnership. However, the Managing General Partner
believes that the cash distributions to the Investors from each of the
Partnerships will likely decrease rapidly as the remaining oil and natural gas
reserves are depleted.
    
   
         (c) Upon the Exchange of the Partnership Units for Common Stock and
Warrants, Investors will recognize gain equal to the amount by which the fair
market value of the Common Stock and Warrants received by them exceeds their
respective bases in the Partnership Units exchanged therefore. Thus, an Investor
will have immediate tax consequences in connection with the Exchange Offer and
liquidation of the Partnerships, and could be required to pay cash for such tax
liabilities, even though the Investor receives only Common Stock and Warrants in
connection with the Exchange. However, the Managing General Partner believes
that the total consideration to be received by an Investor in the Partnerships,
net of the tax consequences to such Investor, is more beneficial to the
Investors than continuation of the Partnerships.

         (d) The Total Exchange Value for the Partnerships is calculated, in
part, based upon the present value of the proved reserves for each of the
Partnerships. There are numerous uncertainties inherent in estimating quantities
of proved reserves. Although the Managing General Partner retained an
independent petroleum engineer to audit the data and computations of the proved
reserve estimates, the reserve estimates for the Partnerships could be
undervalued and would therefore effect Benton's continuation analysis for each
Partnership. However, Benton believes that a material undervaluation of the
reserve estimates is unlikely and therefore the Exchange Offer will be more
beneficial to the Investors than any alternative to the Exchange Offer.

         (e) The Managing General Partner considered the volatility of the
market value of the Benton Common Stock and daily trading volume of the Common
Stock on NASDAQ National Market. Although the market value for the Common Stock
has fluctuated from a low of $4.25 in the first quarter of 1994 to a high of
$15.13 in the second quarter of 1995, the market value has been less volatile in
    

                                       12
<PAGE>   26
   
1995, with the low of $8.63. The average daily trading volume for Benton Common
Stock during the last 30 days has been 259,000 shares. Therefore, the Managing
General Partner believes that the market value of the Benton Common Stock will
not be significantly effected by the issuance of the Common Stock in connection
with the Exchange Offer.
    

   
See "Recommendation of the Managing General Partner." For other relevant
factors, see also "Risk Factors and Material Considerations."
    

          MANAGING GENERAL PARTNER'S DETERMINATION THAT OFFER IS FAIR

   
         THE MANAGING GENERAL PARTNER OF THE PARTNERSHIPS HAS DETERMINED THAT
THE EXCHANGE IS FAIR AND IS IN THE BEST INTERESTS OF THE PARTNERSHIPS AND THEIR
PARTNERS AND HAS RECOMMENDED THAT THE PARTNERS OF THE PARTNERSHIPS TENDER THEIR
PARTNERSHIP UNITS AND CONSENT TO THE PARTNERSHIP PROPOSAL. THE EXCHANGE OFFER IS
NOT CONDITIONED UPON ACCEPTANCE AND APPROVAL BY ALL OF THE PARTNERSHIPS AND THE
MANAGING GENERAL PARTNER BELIEVES THAT THE OFFER IS FAIR TO ALL INVESTORS,
REGARDLESS OF WHICH OR THE NUMBER OF PARTNERSHIPS WHICH ACCEPT THE EXCHANGE
OFFER FOR THE REASONS SET FORTH BELOW.
    

   
                  General. The Managing General Partner has analyzed the terms
of the Exchange Offer, the consideration and value offered to the Investors in
exchange for their Partnership Units and the value of the consideration an
Investor could expect to receive under various alternatives to the Exchange. In
determining that the Exchange Offer is fair to the Investors, the Managing
General Partner considered that the Investors who do not accept the Exchange
Offer or who do not elect to receive cash in lieu of Benton Common Stock will
receive Common Stock and Warrants of Benton, and could receive cash if the
Partnerships were continued or liquidated. However, the Managing General Partner
believes that because an Investor may elect to receive cash in lieu of Common
Stock if the sale to Goldking is consummated, the Investors will receive
consideration in excess of the alternatives to the Exchange if the Exchange
Offer is accepted. The Managing General Partner's analysis of the consideration
an Investor could receive under the alternatives to the Exchange are discussed
below. The Managing General Partner believes that those Investors who receive
Benton Common Stock will have access to a public trading market if such Investor
elects to liquidate his investment for cash. The average daily trading volume
for the Benton Common Stock on the NASDAQ National Market for the 30 trading
days ended September 27, 1995 was 259,000 shares. The Managing General Partner
believes that since the maximum aggregate number of shares of Benton Common
Stock that will be issued in the Exchange Offer for all three Partnerships is
171,880, the issuance will have no material effect on the market value of the
Benton Common Stock, and may allow all Investors receiving shares of Benton
Common Stock in connection with the Exchange Offer and liquidation of the
Partnerships to liquidate their investment in the market.
    

   
                  Alternatives to the Exchange. The following tables summarize
the results of Benton's liquidation analysis in comparison to the Exchange
Values for the Partnership Units determined by Benton. The table also includes
valuation data derived from Benton's analysis of continuing the Partnerships.
Benton did not undertake its continuation analysis for the purpose of valuing
the Partnerships, but solely to illustrate the likelihood of decreasing
distributions based on oil and gas prices at December 31, 1994. However, because
SEC disclosure standards for roll up transactions require a comparison of the
value of the consideration offered in the transaction with the value of the
consideration estimated for each alternative to the transaction, the tables also
reflect the results of extending Benton's
    


                                       13
<PAGE>   27
   
continuation analysis for the balance of the estimated life of each of the
Partnership's Proved Reserves, and discounting the projected stream of
distributions to present value at the same 10% discount rate used in Benton's
liquidation analysis to account for the timing of cash flows as well as
production and concentration risks. For information concerning the assumptions
used in determining the value attributable to each alternative, see
"Recommendation of the Managing General Partner - Managing General Partner's
Determination that Exchange Offer Is Fair."
    
   

                               1989-1 PARTNERSHIP
    

   
<TABLE>
<CAPTION>
                                                                            TOTAL                    VALUE PER
VALUATION METHOD                                                      INVESTOR VALUE(1)             1989-1 UNIT
- ----------------                                                      -----------------             -----------
<S>                                                                   <C>                           <C>
Exchange Value...................................................       $    370,098                 $   1,312
Liquidation value estimated by Benton............................            294,634                     1,045
Continuation analysis by Benton assuming natural
    gas prices of $1.63 per Mcf and oil prices of                             90,661                       322
    $15.94 per Bbl(2)............................................
Value of Proved Reserves at December 31, 1994(3).................            325,540                     1,155
</TABLE>
    

   
(1) The Exchange Value and liquidation value attribute no value to Managing
    General Partners' interests. The continuation analysis assumes continued
    distributions to the Managing General Partner pursuant to the terms of the
    Partnership Agreement.
    

   
(2) The assumed natural gas and oil prices are the prices used for preparation
    of the Partnership's reserve report at December 31, 1994. The continuation
    analysis was calculated based upon Benton's estimate of the remaining
    economic life of the Partnership, estimated to be 3.5 years.
    

   
(3) Based on the Partnership's December 31, 1994 reserve report prepared by
    Benton and audited by Huddleston. The reserves are valued as of December 31
    of each year, based on oil and natural gas prices as of that date. Market
    prices for both oil and natural gas are subject to a significant degree of
    variation, and this variation will affect the calculation of future net cash
    flows reported by the Partnership at any specific date.
    
   

                               1990-1 PARTNERSHIP

    
   
<TABLE>
<CAPTION>
                                                                            TOTAL                    VALUE PER
VALUATION METHOD                                                      INVESTOR VALUE(1)             1990-1 UNIT
- ----------------                                                      -----------------             -----------
<S>                                                                   <C>                           <C>
Exchange Value...................................................       $  2,990,728                 $   2,107
Liquidation value estimated by Benton............................          1,052,601                       742
Continuation analysis by Benton assuming natural
    gas prices of $1.63 per Mcf and oil prices of                            415,355                       293
    $15.94 per Bbl(2)............................................
Value of Proved Reserves at December 31, 1994(3).................           1,057,123                      745
</TABLE>
    

   
(1) The Exchange Value and liquidation value attribute no value to Managing
    General Partners' interests. The continuation analysis assumes continued
    distributions to the Managing General Partner pursuant to the terms of the
    Partnership Agreement.
    

   
(2) The assumed natural gas and oil prices are the prices used for preparation
    of the Partnership's reserve report at December 31, 1994. The continuation
    analysis was calculated based upon Benton's estimate of the remaining
    economic life of the Partnership, estimated to be 5.5 years.
    


                                       14
<PAGE>   28
   
(3) Based on the Partnership's December 31, 1994 reserve report prepared by
    Benton and audited by Huddleston. The reserves are valued as of December 31
    of each year, based on oil and natural gas prices as of that date. Market
    prices for both oil and natural gas are subject to a significant degree of
    variation, and this variation will affect the calculation of future net cash
    flows reported by the Partnership at any specific date.
    
   

                               1991-1 PARTNERSHIP
    

   
<TABLE>
<CAPTION>
                                                                            TOTAL                    VALUE PER
VALUATION METHOD                                                      INVESTOR VALUE(1)             1991-1 UNIT
- ----------------                                                      -----------------             -----------
<S>                                                                   <C>                           <C>
Exchange Value...................................................       $    692,349                 $   2,456
Liquidation value estimated by Benton............................            240,998                       855
Continuation analysis by Benton assuming natural
    gas prices of $1.63 per Mcf and oil prices of                             47,072                       167
    $15.94 per Bbl(2)............................................
Value of Proved Reserves at December 31, 1994(3)                             210,445                       747
</TABLE>
    

   
(1) The Exchange Value and liquidation value attribute no value to Managing
    General Partners' interests. The continuation analysis assumes continued
    distributions to the Managing General Partner pursuant to the terms of the
    Partnership Agreement.
    

   
(2) The assumed natural gas and oil prices are the prices used for preparation
    of the Partnership's reserve report at December 31, 1994. The continuation
    analysis was calculated based upon Benton's estimate of the remaining
    economic life of the Partnership, estimated to be 2.5 years.
    

   
(3) Based on the Partnership's December 31, 1994 reserve report prepared by
    Benton and audited by Huddleston. The reserves are valued as of December 31
    of each year, based on oil and natural gas prices as of that date. Market
    prices for both oil and natural gas are subject to a significant degree of
    variation, and this variation will affect the calculation of future net cash
    flows reported by the Partnership at any specific date.
    

   
         The actual amount that Investors would receive if the Partnerships
    continued their operations would depend on production levels, which cannot
    be predicted with certainty. In addition, the actual amount that Investors
    would receive under either of the alternatives to the Exchange would depend
    on future oil and gas prices. To the extent that future prices for those
    commodities are materially higher or lower than the pricing assumptions made
    by the Managing General Partner, those fluctuations would likely have a
    similar effect on the operating results, distribution rates and market value
    of the Partnership Units, largely negating the effect of price changes on a
    comparison between the Exchange and either alternative of continuing the
    Partnerships or liquidating its assets. In addition, Benton believes that
    liquidating the Partnerships would deprive Investors of the opportunity to
    benefit from any future upturn in oil and gas prices.
    

   
         For a more detailed discussion of the bases for the Managing General
    Partner's determination that the Exchange Offer is fair to Investors, see
    "Recommendation of the Managing General Partner--Managing General Partner's
    Determination that Exchange Offer is Fair."
    

                          SUMMARY OF TAX CONSEQUENCES

         Upon consummation of the Exchange, Investors will realize gain in an
    amount equal to the excess of the fair market value of the Common Stock and
    Warrants received by them over their respective bases in the Partnership
    Units they hold.


                                       15
<PAGE>   29
         Assuming the Investor has held his Interest for more than one year and
assuming his Units have not been held for sale in the ordinary course of the
Investor's trade or business, any gain or loss realized upon the transfer of the
Partnership Units will be taxed as long term capital gain or loss, except to the
extent that the consideration received is attributable to his allocable share of
substantially appreciated inventory items and unrealized receivables (including
depreciation recapture and excess intangible drilling and development costs) of
the Partnerships. The portion of any gain attributable to these items will be
taxed to the Investor as ordinary income.

         Investors should read the more detailed discussion of the federal
income tax consequences contained in "Certain Federal Tax Consequences" and are
also urged to consult with their own tax advisors with respect to the tax
consequences to them of the transaction, including the application of state,
local and foreign tax laws.

                              ACCOUNTING TREATMENT

         The Exchange will be accounted for as a purchase by Benton.
Accordingly, the purchase price will be allocated to assets and liabilities
based on their estimated values as of the date of acquisition.
   

                          REQUEST FOR INVESTOR LISTING
    

   
         Benton will furnish to any Investor, upon oral or written request, a
current alphabetized listing of the names and addresses of all Investors of the
Partnership in which the requesting Investor owns an interest. Requests should
be addressed to Benton Oil and Gas Company, Investor Relations, 1145 Eugenia
Place, Suite 200, Carpinteria, California 93013, telephone number 805-566-5600.
Investors also have the right under the Partnership Agreements to inspect the
books and records of the Partnership.
    

 BUSINESS OF BENTON AND THE PARTNERSHIPS AFTER THE CONSUMMATION OF THE EXCHANGE

   
         Benton is an independent oil and gas company engaged in the acquisition
of producing properties and the exploration, development and production of oil
and gas, primarily in the eastern region of Venezuela, the Gulf Coast of
Louisiana and the West Siberia region of Russia. Benton has executed agreements
on behalf of each of the Partnerships, pursuant to which Benton will sell the
working interests in the Umbrella Point Field to Goldking on the terms described
herein, subject to consummation of the Exchange. If, however, such sale is not
consummated, Benton will operate the acquired Partnership assets as it operates
its oil and gas properties, or may sell those assets to another third party. See
"Background of Exchange Offer--Goldking Offer."
    


                                       16
<PAGE>   30
                     COMPARATIVE RIGHTS OF SECURITY HOLDERS

         For a comparison of the rights of Benton stockholders under Delaware
law and Benton's Certificate of Incorporation and Bylaws with the rights of the
Partners of each of the Partnerships under California law and the respective
Partnership Agreements, see "Comparative Rights of Security Holders."

                         RESALES OF BENTON COMMON STOCK

         The shares of Common Stock that will be issued to Investors in
connection with the Exchange and upon liquidation of the Partnerships have been
registered under the Securities Act. All shares of Common Stock received by
Investors will be freely tradable by those Investors.

                          DESCRIPTION OF THE WARRANTS

   
         To Investors who accept the Exchange Offer, Benton will issue Warrants
to purchase shares of Common Stock. Each Warrant issued pursuant to the 
Exchange Offer will entitle the holder to purchase one share of Common Stock 
for each Warrant held, at an exercise price of $11.00 per share, subject to 
adjustment in certain circumstances. The Warrants will be issued pursuant to a 
Warrant Agreement, the form of which is attached hereto as Exhibit A. Pursuant 
to the terms of the Warrant Agreement, the Warrants will expire three years 
from the date issuance. The number of shares of Common Stock and the exercise 
price of the Warrants is subject to adjustment under certain circumstances, as 
described therein, including issuance of Common Stock or securities convertible
into Common Stock to all holders of Benton Common Stock, exchange of Common 
Stock of Benton for other securities, issuance of Common Stock or other 
securities to all holders upon merger, reorganization, or sale of assets. The 
Warrants are not subject to redemption or call by Benton. If the Exchange Offer
is accepted by more than 75% of the holders of the 1989-1 Units, 1990-1 Units 
and the 1991-1 Units, Benton will issue to all holders of such Units, Warrants 
to purchase an aggregate of 592,373 shares of Common Stock. On October 2, 1995,
there were Warrants to purchase an aggregate of 1,919,752 shares of Common 
Stock issued and outstanding. See "Description of Securities."
    

   
         The number of Warrants to be issued in exchange for 1989-1 Units, 
1990-1 Units and 1991-1 Units has been determined by dividing the estimated 
value of the General Intangibles of the Partnership by the estimated present 
value of $3.64 per Warrant. Benton has used the Black-Scholes option pricing 
model to calculate the present value of the Warrants. THE ACTUAL VALUE, IF ANY,
A HOLDER MAY REALIZE FROM THE WARRANTS WILL DEPEND ON THE EXCESS OF THE MARKET 
PRICE OF THE COMMON STOCK OVER THE EXERCISE PRICE OF THE WARRANT ON THE DATE 
THE WARRANT IS EXERCISED, SO THAT THERE IS NO ASSURANCE THE VALUE REALIZED BY 
A HOLDER WILL BE AT OR NEAR THE VALUE ESTIMATED BY THE BLACK-SCHOLES OPTION 
PRICING MODEL. The estimated values under the model for the Warrants are based 
on assumptions that include (i) a stock price volatility of 33%, (ii) a 
risk-free rate of return based on a three year swap curve rate of 6.03%, and 
(iii) a Warrant exercise term of three years. The Securities and Exchange 
Commission requires disclosure of the value of consideration offered in 
connection with the Exchange Offer. BENTON'S USE OF THE BLACK-SCHOLES MODEL TO 
INDICATE THE PRESENT VALUE OF THE WARRANTS TO BE ISSUED IS NOT AN ENDORSEMENT 
OF THIS VALUATION, WHICH IS BASED UPON CERTAIN ASSUMPTIONS, INCLUDING THE 
ASSUMPTION THAT THE WARRANT WILL BE HELD FOR THE FULL THREE-YEAR TERM PRIOR TO 
EXERCISE.
    


                                       17
<PAGE>   31
          METHOD OF DETERMINING EXCHANGE VALUE FOR 1989-1 PARTNERSHIP

   
         Components of the Exchange Value. The most significant assets
considered by Benton in determining the Exchange Value of the 1989-1 Units were
the anticipated net proceeds from the sale of the Umbrella Point Field. The
purchase offer from Goldking was analyzed by Benton, based in part on the Proved
Reserves of the 1989-1 Partnership and the estimated net cash flows attributable
thereto, derived from a reserve report for the 1989-1 Partnership prepared by
Benton and audited by Huddleston. The Exchange Values represent the sum of (i)
the estimated cash proceeds from the anticipated sale to Goldking of the
Umbrella Point Field, and (ii) the tax-basis balances of equipment as of
December 31, 1994 and the net book value of current assets and liabilities
(reflected on the unaudited balance sheet) of the 1989-1 Partnership as of June
30, 1995. These components represent all of the assets and liabilities of the
1989-1 Partnership and were determined as of June 30, 1995 to conform with the
SEC reporting requirements for unaudited financial information.
    

   
         In determining the Exchange Value, Benton also considered the total
consideration paid to date to participants in the 1989-1 Partnership. For the
1989-1 Partnership, and each of the other Partnerships, Benton assigned a Total
Exchange Value to the Partnership which, based upon certain assumptions
described herein, and in addition to the distributions paid to date, would
provide Investors with consideration valued at 100% of their initial
contribution to the Partnership. See "-- General Intangibles." The estimated
cash proceeds from the sale to Goldking and the value of other tangible assets
of the Partnership are attributable to shares of Benton Common Stock, or cash if
the Investor makes the cash election described herein. The remaining dollar
value, if any, is referred to herein as General Intangibles. Pursuant to the
Exchange Offer, value attributed to General Intangibles will be distributed to
Investors in the form of Warrants.
    

   
         The following unaudited table sets forth (i) the components of the
Exchange Values of the 1989-1 Units and (ii) the Exchange Value per 1989-1 Unit
held by an Investor. This information was compiled by Benton from the 1989-1
Partnership's tax records for the year ended December 31, 1994 and financial
statements for the six months ended June 30, 1995.
    


                                       18
<PAGE>   32
                               1989-1 PARTNERSHIP

                              EXCHANGE VALUE TABLE

   
<TABLE>
<CAPTION>
                                                                      Participants Total   Exchange Value Per
                                                                       Exchange Value(1)   Partnership Unit(2)
                                                                       -----------------   -------------------
<S>                                                                   <C>                  <C>
COMPONENTS OF EXCHANGE VALUES:

Estimated Cash Proceeds-Umbrella Point Field Sale................          $323,296             $1,147

Estimated Value of Proved Reserves of Other Properties at
   12/31/94(3)...................................................                 0                  0

Current assets less current liabilities at 6/30/95(4)............             6,338                 22

Value Of Equipment At 12/31/94(5)................................             4,563                 16
                                                                           --------             ------
     Subtotal-Exchange Value attributable to stock...............           334,197              1,185
                                                                           --------             ------
GENERAL INTANGIBLES..............................................            35,901                127
                                                                           --------             ------
     Subtotal-Exchange Value attributable to Warrants............            35,901                127
                                                                           --------             ------
TOTAL EXCHANGE VALUE.............................................          $370,098             $1,312
                                                                           ========             ======
       NUMBER OF SHARES OF COMMON STOCK TO BE ISSUED PER
         PARTNERSHIP UNIT(6) ....................................                                  107

       NUMBER OF WARRANTS TO BE ISSUED PER PARTNERSHIP UNIT(7)...                                   35
</TABLE>
    

- ----------------------------------
(1)    No exchange value is attributable to Managing General Partner's interest.
(2)    Obtained by dividing the Total Exchange Value by 281.8182 partnership
       units.
(3)    Value of estimated future net cash flows from Proved Reserves of the
       Partnership excluding the Umbrella Point Field, as of December 31, 1994,
       as reflected in the reserve report for the Partnership as of that date.

   
(4)    Net book value of current assets and liabilities at June 30, 1995.
    

(5)    Tax-basis balances of equipment, excluding Umbrella Point Field
       equipment, at December 31, 1994.

   
(6)    Obtained by dividing the Total Exchange Value attributable to stock by
       the Common Stock price of $11.00, subject to rounding adjustments.
    

   
(7)    Obtained by dividing the estimated value of General Intangibles by the
       estimated present value of the Warrants ($3.64 per Warrant). Benton has
       determined the value attributed to General Intangibles based solely upon
       its evaluation of the success to date of the Partnership, total
       consideration paid to date to the participants and the value to Benton in
       dissolving and liquidating the Partnership.
    


                                       19
<PAGE>   33
   
         Anticipated Sales Proceeds. In July 1995, Benton, on behalf of the
1989-1 Partnership, and Goldking executed an agreement whereby Goldking will
purchase a 4.93% working interest in the Umbrella Point Field from the 1989-1
Partnership, subject to approval of the participants of the Partnership. Upon
execution of the agreement, Goldking made an earnest money deposit in favor of
the Partnership of $4,929, included as current assets of the Partnership (the
"Deposit"). Subject to closing adjustments and excluding the Deposit, as of June
30, 1995 the Partnership's estimated cash proceeds from the sale would be
$323,296, or $1,147 per 1989-1 Unit. Benton has made this Exchange Offer in
contemplation of such sale, but the Exchange Offer is not conditioned upon
consummation of such sale.
    

   
         General Intangibles. In determining the value attributed to General
Intangibles, Benton evaluated the success to date of the 1989-1 Partnership,
total consideration paid to date to the participants and the value to Benton of
dissolving and liquidating the 1989-1 Partnership so that Benton can focus on
its current operations and reduce the administrative burdens associated with
operating the Partnership. Based upon Benton's evaluation of historical
administrative costs for the 1989-1 Partnership, Benton estimates that the
administrative costs for operating the Partnership will be approximately $35,000
per year. From inception through September 1995, the 1989-1 Partnership had made
cash distributions to participants aggregating $848,836, or $3,012 per 1989-1
Unit. Benton acknowledges the concerns raised by the Investors in the 1989-1
Partnership with regard to operations of the Partnership, the lack of success
and thus the disappointing returns on investment by the Investors. Because many
of the Investors are or were stockholders of Benton, Benton desires to maintain
a good relationship with these stockholders, many of whom have been strong
supporters of Benton from inception, and Benton desires to avoid future claims
against it by participants relating to the management of the Partnership. See
"The Exchange Offer and Proposal -- Litigation and Related Matters." Assuming
that the Investor in the 1989-1 Partnership elects to hold his or her shares of
Common Stock and exercises his or her Warrants at the end of the three-year
term, and the market price of the Common Stock is at or above approximately
$16.75 per share, Benton believes that the Investors in the 1989-1 Partnership
will have received consideration in the form of cash distributions, Common Stock
and Warrants in excess of the initial investment in the 1989-1 Partnership,
without regard to any tax benefits received by the participants. On October 2,
1995, the last sales price of the Benton Common Stock on NASDAQ National Market
was $11.13 per share. The assumed market price of the Common Stock of $16.75
per share discussed above represents a 34% increase in the market value of the
Benton Common Stock during the three year term of the Warrants. There can       
be no assurance that the market price of the Benton Common Stock will increase
or that such price will be achieved. The value of the General Intangibles of
the Partnership is not subject to valuation by third parties since the General
Intangibles do not represent actual assets of the Partnership. Benton believes
that the participants in the Partnership will not receive any value for the
General Intangibles in any alternative to the Exchange.     

          METHOD OF DETERMINING EXCHANGE VALUE FOR 1990-1 PARTNERSHIP

         Components of the Exchange Value. The most significant assets
considered by Benton in determining the Exchange Value of the 1990-1 Units were
the anticipated net proceeds from the sale of the Umbrella Point Field and
Proved Reserves of the 1990-1 Partnership. The Exchange Values represent the sum
of (i) the estimated cash proceeds from the anticipated sale of Umbrella Point
Field to Goldking, (ii) the estimated present value of future net cash flows
from the Proved Reserves of the 1990-1 Partnership as of December 31, 1994,
discounted at 10% per year and calculated without escalation of prices and
costs, as reflected in the reserve report for the 1990-1 Partnership as of that
date prepared by Benton and audited by Huddleston, (iii) the tax-basis balances
of equipment as of December 31, 1994 and the net book value of current assets
and liabilities (reflected on the unaudited balance sheet) of the


                                       20
<PAGE>   34
   
1990-1 Partnership as of June 30, 1995, and (iv) the value of General
Intangibles. These components represent all of the assets and liabilities of the
1990-1 Partnership and were determined as of the year end and June 30, 1995 to
conform with the SEC reporting requirements for reserve information and
unaudited financial information, respectively. Since the year-end reserve
information is audited, the Exchange Values were derived from that information.
    

   
         In determining the Exchange Value, Benton also considered the total
consideration paid to date to participants in the 1990-1 Partnership. For the
1990-1 Partnership, and each of the other Partnerships, Benton assigned a Total
Exchange Value to the Partnership which, based upon certain assumptions
described herein, and in addition to the distributions paid to date, would
provide Investors with consideration valued at 100% of their initial
contribution to the Partnership. See "- General Intangibles" for a discussion of
the assumptions used by Benton. The estimated cash proceeds from the sale to
Goldking and the value of other tangible assets of the Partnership are
attributable to shares of Benton Common Stock, or cash if the investor makes the
cash election described herein. The remaining dollar value is referred to herein
as General Intangibles. Pursuant to the Exchange Offer, value attributed to
General Intangibles will be distributed to Investors in the form of Warrants.
    

   
         The following unaudited table sets forth (i) the components of the
Exchange Values of the 1990-1 Units and (ii) the Exchange Value per 1990-1 Unit
held by an Investor. This information was compiled by Benton from the 1990-1
Partnership's reserve report as of December 31, 1994 (a summary of which is
included in Exhibit B to this Prospectus) and the 1990-1 Partnership's tax
records for the year ended December 31, 1994 and financial statements for the
six months ended June 30, 1995.
    


                                       21
<PAGE>   35

                               1990-1 PARTNERSHIP
                              EXCHANGE VALUE TABLE

   
<TABLE>
<Caption
                                                                    Participants Total         Exchange Value Per
                                                                     Exchange Value(1)         Partnership Unit(2)
                                                                     -----------------         -------------------
<S>                                                                 <C>                        <C>
COMPONENTS OF EXCHANGE VALUES:

Estimated Cash Proceeds-Umbrella Point Field Sale................       $  930,865                    $  656

Estimated Value Of Proved Reserves of Other Properties at
   12/31/94(3)...................................................          119,694                        84

Current assets less current liabilities at 6/30/95(4)............          201,736                       142

Value of equipment at 12/31/94(5)................................           13,037                         9
                                                                        ----------                    ------
     Subtotal--Exchange Value attributable to stock..............        1,265,332                       891
                                                                        ----------                    ------
General Intangibles..............................................        1,725,396                     1,216
                                                                        ----------                    ------
     Subtotal--Exchange Value attributable to warrants...........        1,725,396                     1,216
                                                                        ----------                    ------
TOTAL EXCHANGE VALUE.............................................       $2,990,728                    $2,107
                                                                        ==========                    ======
     NUMBER OF SHARES OF COMMON STOCK TO BE ISSUED PER
       PARTNERSHIP UNIT(6).......................................                                         81

     NUMBER OF WARRANTS TO BE ISSUED PER PARTNERSHIP UNIT(7).....                                        334
</TABLE>
    

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

(1)    No exchange value is attributable to Managing General Partner's interest.

   
(2)    Obtained by dividing the Total Exchange Value by 1,419.192 partnership
       units.
    

(3)    Value of estimated future net cash flows from Proved Reserves of the
       Partnership excluding the Umbrella Point Field, as of December 31, 1994,
       as reflected in the reserve report for the Partnership as of that date.

   
(4)    Net book value of current assets and liabilities at June 30, 1995.
    

(5)    Tax-basis balances of equipment, excluding Umbrella Point Field
       equipment, at December 31, 1994.

   
(6)    Obtained by dividing the Exchange Value attributable to stock by the
       Common Stock price of $11.00, subject to rounding adjustments.
    

   
(7)    Obtained by dividing the estimated value of General Intangibles by the
       estimated present value of the Warrants ($3.64 per Warrant). Benton has
       determined the value attributed to General Intangibles based solely upon
       its evaluation of the success to date of the Partnership, total
       consideration paid to date to the participants and the value to Benton in
       dissolving and liquidating the Partnership.
    

   
         Anticipated Sales Proceeds. In July 1995, Benton, on behalf of the
1990-1 Partnership, and Goldking executed an agreement whereby Goldking will
purchase a 14.19% working interest in the Umbrella Point Field from the 1990-1
Partnership, subject to approval of the participants of the Partnership. Upon
execution of the agreement, Goldking made an earnest money deposit in favor of
the Partnership of $14,192, included as current assets of the Partnership (the
"Deposit"). Subject to closing adjustments and excluding the Deposit, as of June
30, 1995 the Partnership's estimated cash proceeds from the sale would be
$930,865, or $656 per 1990-1 Unit. Benton has made this Exchange Offer in
contemplation of such sale, but the Exchange Offer is not conditioned upon
consummation of such sale.
    


                                       22
<PAGE>   36
         Proved Reserves. Proved Reserves of the 1990-1 Partnership and the
estimated net cash flows attributable thereto were derived from a reserve report
for the 1990-1 Partnership prepared by Benton and audited by Huddleston. The
reserve estimates were prepared in accordance with SEC regulations, with
estimated future net cash flows from Proved Reserves based on prices as of the
date of the report held constant over the estimated life of the reserves and
discounted at the prescribed rate of 10% per annum ("SEC PV 10"). No risk
adjustment factor was applied to the estimated future net cash flows from the
Proved Reserves of the 1990-1 Partnership to account for uncertainties inherent
in projecting future production rates, and no adjustment was made to take into
account fluctuations in oil and gas prices after December 31, 1994.

   
         General Intangibles. In determining the value attributed to General
Intangibles, Benton evaluated the success to date of the 1990-1 Partnership,
total consideration paid to date to the participants and the value to Benton of
dissolving and liquidating the 1990-1 Partnership so that Benton can focus on
its current operations and reduce the administrative burdens associated with
operating the Partnership. Based upon Benton's evaluation of historical
administrative costs for the 1990-1 Partnership, Benton estimates that the
administrative costs for operating the Partnership will be approximately $80,000
per year. From inception through September 1995, the 1990-1 Partnership has made
cash distributions to participants aggregating $2,452,364, or $1,728 per 1990-1
Unit. Benton acknowledges the concerns raised by the Investors in the 1990-1
Partnership with regard to operations of the Partnership, the lack of success
and thus the disappointing returns on investment by the Investors. Because many
of the Investors are or were stockholders of Benton, Benton desires to maintain
a good relationship with these stockholders, many of whom have been strong
supporters of Benton from inception, and Benton desires to avoid future claims
against it by participants relating to the management of the Partnership. See
"The Exchange Offer and Proposal -- Litigation and Related Matters." Assuming
that the Investor in the 1990-1 Partnership elects to hold his or her shares of
Common Stock and exercises his or her Warrants at the end of the three-year
term, and the market price of the Common Stock is at or above approximately
$16.75 per share, Benton believes that the Investors in the 1990-1 Partnership
will have received consideration in the form of cash distributions, Common Stock
and Warrants in excess of the initial investment in the 1990-1 Partnership,
without regard to any tax benefits received by the participants. On October 2,
1995, the last sales price of the Benton Common Stock on NASDAQ National
Market was $11.13 per share. The assumed market price of the Common Stock
of $16.75 per share discussed above represents a 34% increase in the market
value of the Benton Common Stock during the three year term of the Warrants.
There can be no assurance that the market price of the Benton Common Stock will
increase or that such price will be achieved. The value of the General
Intangibles of the Partnership is not subject to valuation by third parties
since the General Intangibles do not represent actual assets of the Partnership.
Benton believes that the participants in the Partnership will not receive any
value for the General Intangibles in any alternative to the Exchange.
    

         Uncertainties Inherent in Valuation Methodology. There are numerous
uncertainties inherent in estimating quantities and production rates of
hydrocarbons. Estimates of the 1990-1 Partnership's Proved Reserves by
independent petroleum engineers other than Huddleston could result in higher or
lower valuations than those determined by Benton and audited by Huddleston. The
Exchange Values may not reflect the value of the 1990-1 Units or the value of
the properties attributable to the 1990-1 Units if sold to an unaffiliated third
party in an arm's length transaction.


                                       23
<PAGE>   37
          METHOD OF DETERMINING EXCHANGE VALUE FOR 1991-1 PARTNERSHIP

   
         Components of the Exchange Value. The most significant assets
considered by Benton in determining the Exchange Value of the 1991-1 Units were
the anticipated net proceeds from the sale of the Umbrella Point Field and
Proved Reserves of the 1991-1 Partnership. The Exchange Values represent the sum
of (i) the estimated cash proceeds from the anticipated sale of Umbrella Point
Field to Goldking, (ii) the estimated present value of future net cash flows
from the Proved Reserves of the 1991-1 Partnership as of December 31, 1994,
discounted at 10% per year and calculated without escalation of prices and
costs, as reflected in the reserve report for the 1991-1 Partnership as of that
date prepared by Benton and audited by Huddleston, (iii) the tax-basis balances
of equipment as of December 31, 1994 and the net book value of current assets
and liabilities (reflected on the unaudited balance sheet) of the 1991-1
Partnership as of June 30, 1995, and (iv) the value of General Intangibles.
These components represent all of the assets and liabilities of the 1991-1
Partnership and were determined as of year end and June 30, 1995 to conform with
the SEC reporting requirements for reserve information and unaudited financial
information, respectively. Since the year-end reserve information is audited,
the Exchange Values were derived from that information.
    

   
         In determining the Exchange Value, Benton also considered the total
consideration paid to date to participants in the 1991-1 Partnership. For the
1991-1 Partnership, and each of the other Partnerships, Benton assigned a Total
Exchange Value to the Partnership which, based upon certain assumptions
described herein, and in addition to the distributions paid to date, would
provide Investors with consideration valued at 100% of their initial
contribution to the Partnership. See "- General Intangibles" for a discussion of
the assumptions used by Benton. The estimated cash proceeds from the sale to
Goldking and the value of other tangible assets of the Partnership are
attributable to shares of Benton Common Stock, or cash if the Investor makes the
cash election described herein. The remaining dollar value is referred to herein
as General Intangibles. Pursuant to the Exchange Offer, value attributed to
General Intangibles will be distributed to Investors in the form of Warrants.
    

   
         The following unaudited table sets forth (i) the components of the
Exchange Values of the 1991-1 Units and (ii) the Exchange Value per 1991-1 Unit
held by an Investor. This information was compiled by Benton from the 1991-1
Partnership's reserve report as of December 31, 1994 (a summary of which is
included in Exhibit B to this Prospectus) and the 1991-1 Partnership's tax
records for the year ended December 31, 1994 and financial statements for the
six months ended June 30, 1995.
    


                                       24
<PAGE>   38
                               1991-1 PARTNERSHIP
                              EXCHANGE VALUE TABLE

   
<TABLE>
<CAPTION>
                                                                 Participants Total     Exchange Value Per
                                                                  Exchange Value(1)     Partnership Unit(2)
                                                                  -----------------     -------------------
<S>                                                              <C>                    <C>
COMPONENTS OF EXCHANGE VALUES:

Estimated Cash Proceeds--Umbrella Point Field Sale............        $185,282                 $  657

Estimated Value of Proved Reserves of Other Properties at
   12/31/94(3)...............................................           23,856                     85

Current Assets Less Current Liabilities At 6/30/95(4)........           85,716                    304

Value Of Equipment At 12/31/94(5)............................            2,555                      9
                                                                      --------                 ------
     Subtotal-Exchange Value attributable to stock...........          297,409                  1,055
                                                                      --------                 ------
General Intangibles..........................................          394,940                  1,401
                                                                      --------                 ------
     Subtotal-Exchange Value attributable to warrants........          394,940                  1,401
                                                                      --------                 ------
TOTAL EXCHANGE VALUE.........................................         $692,349                 $2,456
                                                                      ========                 ======

         NUMBER OF SHARES OF COMMON STOCK TO BE ISSUED PER
           PARTNERSHIP UNIT(6)...............................                                      95

         NUMBER OF WARRANTS TO BE ISSUED PER PARTNERSHIP
           Unit(7)...........................................                                     385
</TABLE>
    

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

(1)    No exchange value is attributable to Managing General Partner's interest.
(2)    Obtained by dividing the Total Exchange Value by 281.8182 partnership
       units.
(3)    Value of estimated future net cash flows from Proved Reserves of the
       Partnership excluding the Umbrella Point Field, as of December 31, 1994,
       as reflected in the reserve report for the Partnership as of that date.
   
(4)    Net book value of current assets and liabilities at June 30, 1995.
    
(5)    Tax-basis balances of equipment, excluding Umbrella Point Field
       equipment, at December 31, 1994.
   
(6)    Obtained by dividing the Exchange Value attributable to stock by the
       Common Stock price of $11.00, subject to rounding adjustments.
    

   
(7)    Obtained by dividing the estimated value of General Intangibles by the
       estimated present value of the Warrants ($3.64 per Warrant). Benton has
       determined the value attributed to General Intangibles based solely upon
       its evaluation of the success to date of the Partnership, total
       consideration paid to date to the participants and the value to Benton in
       dissolving and liquidating the Partnership.
    

   
         Anticipated Sales Proceeds. In July 1995, Benton, on behalf of the
1991-1 Partnership, and Goldking executed an agreement whereby Goldking will
purchase a 2.83% working interest in the Umbrella Point Field from the 1991-1
Partnership, subject to approval of the participants of the Partnership. Upon
execution of the agreement, Goldking made an earnest money deposit in favor of
the Partnership of $2,824, included as current assets of the Partnership (the
"Deposit"). Subject to closing adjustments and excluding the Deposit, as of June
30, 1995 the Partnership's estimated cash proceeds from the sale would be
$185,282, or $657 per 1991-1 Unit. Benton has made this Exchange Offer in
contemplation of such sale, but the Exchange Offer is not conditioned upon
consummation of such sale.
    


                                       25
<PAGE>   39
         Proved Reserves. Proved Reserves of the 1991-1 Partnership and the
estimated net cash flows attributable thereto were derived from a reserve report
for the 1991-1 Partnership prepared by Benton and audited by Huddleston. The
reserve estimates were prepared in accordance with SEC regulations, with
estimated future net cash flows from Proved Reserves based on prices as of the
date of the report held constant over the estimated life of the reserves and
discounted at the prescribed rate of 10% per annum ("SEC PV 10"). No risk
adjustment factor was applied to the estimated future net cash flows from the
Proved Reserves of the 1991-1 Partnership to account for uncertainties inherent
in projecting future production rates, and no adjustment was made to take into
account fluctuations in oil and gas prices after December 31, 1994.

   
         General Intangibles. In determining the value attributed to General
Intangibles, Benton evaluated the success to date of the 1991-1 Partnership,
total consideration paid to date to the participants and the value to Benton of
dissolving and liquidating the 1991-1 Partnership so that Benton can focus on
its current operations and reduce the administrative burdens associated with
operating the Partnership. Based upon Benton's evaluation of historical
administrative costs for the 1991-1 Partnership, Benton estimates that the
administrative costs for operating the Partnership will be approximately $31,000
per year. From inception through July 1995, the 1991-1 Partnership has made cash
distributions to participants aggregating $338,182, or $1,200 per 1991-1 Unit.
Benton acknowledges the concerns raised by the Investors in the 1991-1
Partnership with regard to operations of the Partnership, the lack of success
and thus the disappointing returns on investment by the Investors. Because many
of the Investors are or were stockholders of Benton, Benton desires to maintain
a good relationship with these stockholders, many of whom have been strong
supporters of Benton from inception, and Benton desires to avoid future claims
against it by participants relating to the management of the Partnership. See
"The Exchange Offer and Proposal--Litigation and Related Matters." Assuming that
the Investor in the 1991-1 Partnership elects to hold his or her shares of
Common Stock and exercises his or her Warrants at the end of the three-year
term, and the market price of the Common Stock is at or above approximately
$16.75 per share, Benton believes that the Investors in the 1991-1 Partnership
will have received consideration in the form of cash distributions, Common Stock
and Warrants in excess of the initial investment in the 1991-1 Partnership,
without regard to any tax benefits received by the participants. On October 2,
1995, the last sales price of the Benton Common Stock on NASDAQ National Market 
was $11.13 per share. The assumed market price of the Common Stock of $16.75
per share discussed above represents a 34% increase in the market value of      
the Benton Common Stock during the three year term of the Warrants.  There can
be no assurance that the market price of the Benton Common Stock will increase
or that such price will be achieved. The value of the General Intangibles of
the Partnership is not subject to valuation by third parties since the General
Intangibles do not represent actual assets of the Partnership. Benton believes
that the participants in the Partnership will not receive any value for the
General Intangibles in any alternative to the Exchange. 
    

         Uncertainties Inherent in Valuation Methodology. There are numerous
uncertainties inherent in estimating quantities and production rates of
hydrocarbons. Estimates of the 1991-1 Partnership's Proved Reserves by
independent petroleum engineers other than Huddleston could result in higher or
lower valuations than those determined by Benton and audited by Huddleston. The
Exchange Values may not reflect the value of the 1991-1 Units or the value of
the properties attributable to the 1991-1 Units if sold to an unaffiliated third
party in an arm's length transaction.


                                       26
<PAGE>   40
                               CONSENT PROCEDURES

         To tender Partnership Units in exchange for Common Stock and Warrants
at the Exchange Rate applicable to the Partnership Unit and thereby consent to
the Proposal, an Investor should complete and sign the Letter of Transmittal
accompanying this Prospectus (a form of which is included as Exhibit D, and
return it to Benton during the 60-day period ending at 5:00 p.m. Pacific Time on
_________, 1995 (the "Expiration Date"). The Expiration Date may be extended for
up to an additional 10-day period, although no extension is presently
contemplated. Benton will not accept tenders of less than all of the Partnership
Units held by an Investor. Tenders of Units and consents to the Proposals may be
withdrawn upon written notice to Benton at any time prior to the Expiration
Date. See "Consent Procedures."

                             CONDITIONS TO EXCHANGE

         Closing Date. The Exchange Offer is expected to be consummated on the
Closing Date, which will be no more than five days following the Expiration
Date, as extended.

   
         1989-1 Partnership. The Exchange Offer to the 1989-1 Partnership is
conditioned upon consent of 75% of the 1989-1 Units to the 1989-1 Proposal and
the absence of any material adverse development affecting the 1989-1
Partnership, as determined by Benton in the exercise of reasonable judgment. On
the Closing Date, subject to satisfaction of these conditions, Benton intends to
accept all 1989-1 Units validly tendered and not withdrawn pursuant to the
Exchange Offer.
    

   
         1990-1 Partnership. The Exchange Offer to the 1990-1 Partnership is
conditioned upon consent of 75% of the 1990-1 Units to the 1990-1 Proposal and
the absence of any material adverse development affecting the 1990-1
Partnership, as determined by Benton in the exercise of reasonable judgment. On
the Closing Date, subject to satisfaction of these conditions, Benton intends to
accept all 1990-1 Units validly tendered and not withdrawn pursuant to the
Exchange Offer.
    

   
         1991-1 Partnership. The Exchange Offer to the 1991-1 Partnership is
conditioned upon consent of 75% of the 1991-1 Units to the 1991-1 Proposal and
the absence of any material adverse development affecting the 1991-1
Partnership, as determined by Benton in the exercise of reasonable judgment. On
the Closing Date, subject to satisfaction of these conditions, Benton intends to
accept all 1991-1 Units validly tendered and not withdrawn pursuant to the
Exchange Offer.
    

                              REGULATORY APPROVALS

         No federal or state regulatory approval is required in connection with
the Exchange Offer or the adoption of the Proposals by the Partnerships.

                CERTAIN HISTORICAL AND PRO FORMA FINANCIAL DATA

   
         Benton Selected Historical and Unaudited Pro Forma Consolidated
Financial Data. The following selected consolidated financial data for Benton
Oil and Gas Company as of and for each of the years in the five year period
ended December 31, 1994 are derived from Benton's audited consolidated financial
statements. The selected consolidated financial data for the six months ended
June 30, 1994 and 1995 are derived from Benton's unaudited financial statements.
In the opinion of management, such unaudited financial statements contain all
adjustments (consisting of only normal recurring accruals) necessary for a fair
presentation of the financial condition and results of operations as of and for
the
    


                                       27
<PAGE>   41
   
periods presented. Operating results for the six months ended June 30, 1995 are
not necessarily indicative of the results that may be expected for the entire
fiscal year ending December 31, 1995. The pro forma operating data and pro forma
balance sheet data below give effect to the Exchange Offer as if it had been
completed on January 1, 1994 and June 30, 1995, respectively. The selected
consolidated financial data below should be read in conjunction with Benton's
consolidated financial statements and related notes thereto, Management's
Discussion and Analysis of Financial Condition and Results of Operations, and
Pro Forma Financial Information included elsewhere herein or incorporated by
reference herein.
    

   

<TABLE>
<CAPTION>
IN THOUSANDS, EXCEPT                                                         Six Months Ended
PER SHARE AMOUNTS                       Years Ended December 31                    June 30
                         ------------------------------------------------   ------------------
                         1990(3)   1991(3)     1992      1993      1994       1994       1995
                         -------   -------     ----      ----      ----       ----       ----
<S>                      <C>       <C>       <C>       <C>       <C>        <C>        <C>
OPERATING DATA
Total revenues.........  $ 4,677   $11,513   $ 8,622   $ 7,503   $ 34,705   $ 12,160   $25,870
Lease operating
  costs and
  production taxes.....    1,609     4,209     4,414     5,110      9,531      3,948     5,287
Depletion,
  depreciation and
  amortization.........      882     3,058     3,041     2,633     10,298      3,421     6,473
General and
  administrative
  expense..............    1,709     1,998     2,245     2,631      5,242      2,445     3,884
Interest expense.......      318     1,736     1,831     1,958      3,888      1,597     3,361
                         -------   -------   -------   -------   --------   --------   -------
Income (loss) before
  income taxes and
  minority interest....      159       512    (2,909)   (4,829)     5,746        749     6,865
Income tax expense.....      ---       ---       ---       ---        698        ---     1,971
                         -------   -------   -------   -------   --------   --------   -------
Income (loss) before
  minority interest....      159       512    (2,909)   (4,829)     5,048        749     4,894
Minority interest......      ---       ---       ---       ---      2,094        747     1,742
                         -------   -------   -------   -------   --------        ---   -------
Net income (loss)......  $   159   $   512   $(2,909)  $(4,829)  $  2,954   $      2   $ 3,152
                         =======   =======   =======   =======   ========   ========   =======
Net income (loss)
  per common share(1)..  $  0.02   $  0.04   $ (0.22)  $ (0.26)  $   0.12   $   0.00   $  0.12
                         =======   =======   =======   =======   ========   ========   =======
Weighted average
  common shares
  outstanding(1)(2)....   10,357    11,838    12,981    18,609     24,851     25,153    26,459
Ratio of earnings to
  fixed charges(5).....     1.47x     1.29x      ---       ---       1.92x      1.00x     2.51x
Net increase
  (decrease) in cash
  and cash
  equivalents..........  $ 3,621   $(1,401)  $ 9,996   $22,635   $(22,116)  $(34,022)  $11,224
Net cash provided by
  (used in)
  operating
  activities...........  $ 4,797   $ 4,027   $  (648)  $(1,790)  $ 13,463   $  3,299   $ 8,187
</TABLE>
    

                                       28
<PAGE>   42
   
<TABLE>
<CAPTION>
                                                 Year Ended     Six Months Ended
                                                December 31,        June 30,
                                                    1994              1995
                                                    ----              ----
<S>                                             <C>             <C>
PRO FORMA

Before roll-up expenses and payments:
   Net income...............................       $2,790           $3,035
   Income per common share..................       $ 0.11           $ 0.11
   Ratio of earnings to fixed charges(5)....         1.88x            2.47x

After roll-up expenses and payments:
   Net income...............................       $   89           $3,035
   Income per common share..................       $ 0.00           $ 0.11
   Ratio of earnings to fixed charges(5)....         1.20x            2.47x
</TABLE>
    

   
<TABLE>
<CAPTION>
                                                  At December 31                    At June 30, 1995
IN THOUSANDS, EXCEPT PER        ------------------------------------------------   ---------------------
  SHARE AMOUNTS                   1990       1991     1992      1993      1994     HISTORICAL  PRO FORMA
                                  ----       ----     ----      ----      ----     ----------  ---------
<S>                             <C>       <C>        <C>      <C>       <C>        <C>         <C>
BALANCE SHEET DATA

Cash and cash equivalents       $ 5,078   $  3,677   $13,673  $ 36,308  $ 14,193    $ 25,416   $ 25,105

Working capital (deficit)        (1,861)   (14,777)   10,486    26,635    21,785      22,139     23,327

Total assets                     27,253     49,386    68,217   108,635   162,561     190,209    191,495

Long-term obligations, net of
  current portion                 7,251      7,422    11,288    11,788    31,911      53,268     53,268

Total liabilities                17,190     29,177    15,574    24,614    74,302      97,400     97,340

Stockholders' equity(4)          10,064     20,209    50,468    84,021    88,259      92,809     94,155

Book Value Per Share            $  1.17   $   1.96   $  2.89  $   3.40  $   3.54    $   3.70   $   3.72
</TABLE>
    

- -----------------
(1)    The share information for the Company has been adjusted to reflect
       two-for-one stock splits in the form of 100% stock dividends effective
       July 9, 1990 and February 26, 1991.
   
(2)    The weighted average common shares outstanding for the Company have been
       adjusted for the effect of common stock equivalents for the years ended
       December 31, 1990, 1991 and 1994 and for the six months ended June 30,
       1994 and 1995.
    
(3)    For the years ended December 31, 1991 and 1990 the Company recorded
       income tax expense of $174,000 and $41,000 respectively, and an
       extraordinary item for the utilization of loss carry forward for the same
       amounts.
(4)    No cash dividends were paid during any period presented.
   
(5)    For purposes of computing the ratio, "earnings" represents income (loss)
       from operations before income taxes and extraordinary items plus fixed
       charges exclusive of capitalized interest, and "fixed charges" consists
       of interest whether expensed or capitalized, amortization of debt expense
       and an estimated portion of rent expense representing interest costs. As
       a result of losses incurred by the Company for the years ended December
       31, 1993 and 1992, earnings did not cover fixed charges by $4,829,000 and
       $2,909,000, respectively.

    

                                       29
<PAGE>   43
   
        1989-1 Partnership Selected Historical Financial Data. The following
selected financial data for the 1989-1 Partnership as of and for each of the
years in the five year period ended December 31, 1994 are derived from the
1989-1 Partnership's audited financial statements. The selected consolidated
financial data for the six months ended June 30, 1994 and 1995 are derived from
the 1989-1 Partnership's unaudited financial statements. In the opinion of
management, such unaudited financial statements contain all adjustments
(consisting of only normal recurring accruals) necessary for a fair presentation
of the financial condition and results of operations as of and for the periods
presented. Operating results for the six months ended June 30, 1995 are not
necessarily indicative of the results that may be expected for the entire fiscal
year ending December 31, 1995. The selected financial data below should be read
in conjunction with the 1989-1 Partnership's financial statements and related
notes thereto and Management's Discussion and Analysis of Financial Condition
and Results of Operations included elsewhere in this proxy Statement/Prospectus.
    

   
<TABLE>
<CAPTION>
                                                                                                              Six Months Ended
                                                           Years Ended December 31,                               June 30,
                                    -----------------------------------------------------------------     -----------------------
                                       1990          1991          1992          1993          1994          1994          1995
                                       ----          ----          ----          ----          ----          ----          ----
<S>                                 <C>           <C>           <C>           <C>           <C>           <C>           <C>      
   Operating Data
     Total revenue                  $ 212,781     $ 217,023     $ 225,460     $ 203,380     $ 160,413     $  87,880     $  77,765
     Lease operating costs and
       production taxes                60,471        85,894        73,309        76,855        79,479        33,929        31,001
     Exploration costs                                              1,627         1,891           789           789
     Depletion, impairment and
       amortization                    46,224        74,122       111,050        72,453        77,895        42,831        90,155
     General and administrative        31,086        17,428        32,110        38,432        33,654        27,032        31,746
                                    ---------     ---------     ---------     ---------     ---------     ---------     ---------
        Net income (loss)           $  75,000     $  39,579     $   7,364     $  13,749     ($ 31,404)    ($ 16,701)    ($ 75,137)
                                    =========     =========     =========     =========     =========     =========     =========
     Net decrease in
       cash and cash equivalents    ($100,529)    ($ 82,547)    ($241,781)    ($127,320)    ($106,355)    ($ 10,024)    ($    684)
     Net cash provided by
       operating activities           187,669       111,201       117,414        86,202        46,491        26,130        15,018
     Distributions                    140,064       211,364       281,818       169,936       135,615        30,436            --

   Per Unit Operating Data (1)
     Net income (loss)                    192            61           (70)          (16)         (149)          (86)         (300)
     Distributions of earnings            192            61            --            --            --            --            --
  Distributions representing a
    return of capital                     308           686         1,003           600           162           108            --
</TABLE>
    

   
<TABLE>
<CAPTION>
                                                                        December 31,                                June 30,
                                              ------------------------------------------------------------    --------------------
                                                 1990          1991           1992      1993        1994        1994        1995
                                                 ----          ----           ----      ----        ----        ----        ----
<S>                                           <C>           <C>           <C>         <C>         <C>         <C>         <C>     
   Balance Sheet Data
     Cash and cash equivalents                $  564,404    $  481,857    $240,076    $112,756    $  6,401    $102,732    $  5,717
     Total assets at book value                1,177,716     1,016,060     727,977     571,790     407,052     524,653     329,634
     Total assets at the value
       assigned for purposes of
       roll-up transaction                                                                                                 370,098
     Total liabilities                             3,500        13,629          --          --       2,281          --          --
     General and limited partners' equity:
         Managing General Partner                 34,706        54,437      79,213      94,780      14,658     101,700      23,147
         Participants                          1,139,510       947,994     648,764     477,010     390,113     422,953     306,487
                                              ----------    ----------    --------    --------    --------    --------    --------
                                              $1,174,216    $1,002,431    $727,977    $571,790    $404,771    $524,653    $329,634
                                              ==========    ==========    ========    ========    ========    ========    ========
   Per Unit Balance Sheet Data(1)
     Book value                               $    4,084    $    3,398    $  2,325    $  1,710    $  1,398    $  1,516    $  1,099
     Value assigned for purpose
         of the roll-up transaction                                                                                          1,312

    
<FN>
(1)  Per unit data is based on indicated amounts allocable to limited partners
     other than Benton divided by 279 limited partner units outstanding.
</TABLE>



                                       30
<PAGE>   44

   
         1990-1 Partnership Selected Historical Financial Data. The following
selected financial data for the 1990-1 Partnership as of and for each of the
years in the five year period ended December 31, 1994 are derived from the
1990-1 Partnership's audited financial statements. The selected consolidated
financial data for the six months ended June 30, 1994 and 1995 are derived from
the 1990-1 Partnership's unaudited financial statements. In the opinion of
management, such unaudited financial statements contain all adjustments
(consisting of only normal recurring accruals) necessary for a fair presentation
of the financial condition and results of operations as of and for the periods
presented. Operating results for the six months ended June 30, 1995 are not
necessarily indicative of the results that may be expected for the entire fiscal
year ending December 31, 1995. The selected financial data below should be read
in conjunction with the 1990-1 Partnership's financial statements and related
notes thereto and Management's Discussion and Analysis of Financial Condition
and Results of Operations included elsewhere in this Proxy Statement/Prospectus.
    

   
<TABLE>
<CAPTION>
                                                                                                               Six Months Ended
                                      Inception to              Years Ended December 31                             June 30,
                                       December 31  ---------------------------------------------------   --------------------------
                                           1990         1991         1992          1993         1994          1994           1995
                                       -----------      ----         ----          ----         ----          ----           ----
<S>                                    <C>          <C>           <C>           <C>         <C>           <C>           <C>        
 Operating Data
   Total revenue                       $   477,806  $ 1,104,681   $   770,517   $ 645,459   $   524,786   $   280,792   $   235,273
   Lease operating costs
     and production taxes                  155,247      440,434       285,840     254,903       263,957       112,323       100,135
   Exploration costs                        29,089      887,842         8,952       9,570         6,607         5,331         1,812
   Loss on sale of oil and
     gas properties                                                    57,586                                                 1,328
   Depletion, impairment
     and amortization                      142,600      425,583     1,560,665     189,309       224,635       113,834       153,641
   General and administrative               36,753      176,317        69,510      99,967        78,547        58,782        67,323
                                       -----------  -----------   -----------   ---------   -----------   -----------   -----------
     Net income (loss)                 $   114,117  ($  825,495)  ($1,212,036)  $  91,710   ($   48,960)  ($    9,478)  ($   88,966)
                                       ===========  ===========   ===========   =========   ===========   ===========   ===========
   Net increase (decrease)
     in cash and cash equivalents      $ 3,057,412  ($1,780,352)  ($  399,559)  ($457,675)  ($  401,967)  $     9,583   $   127,596
   Net cash provided by
     operating activities                  124,336      356,853       407,453     290,032       173,410       104,807        66,003
   Distributions                               ---      706,351     1,071,312     604,582       463,345        64,633            --

Per Unit Operating Data (1)
   Net income (loss)                            24         (703)         (935)          9           (68)          (27)          (76)
   Distributions of earnings                    --           --            --          --            --            --            --
   Distributions
     representing a return of capital           --          500           762         400            66            44            --
</TABLE>
    

   
<TABLE>
<CAPTION>
                                                           December 31,                                June 30,
                                    ----------------------------------------------------------  ----------------------  
                                       1990        1991         1992        1993        1994        1994        1995
                                       ----        ----         ----        ----        ----        ----        ----
<S>                                 <C>         <C>         <C>         <C>         <C>         <C>         <C>       
   Balance Sheet Data
     Cash and cash equivalents      $3,057,412  $1,277,060  $  877,501  $  419,826  $   17,859  $  429,409  $  145,455
     Total assets at book value      6,719,035   4,713,665   2,380,317   1,867,445   1,355,140   1,793,334   1,266,174
     Total assets at the value
       assigned for purposes of
       roll-up transaction           2,990,728
     Total liabilities                 523,524      50,000          --          --          --          --          --
     General and Limited Partners'
       Equity:
         Managing General Partner      137,695     291,366     386,815     436,921     111,441     462,867     126,832
         Participants                6,053,875   4,363,866   1,978,692   1,429,384   1,240,417   1,329,209   1,134,106
         Special Limited Partners        3,941       8,433      14,810       1,140       3,282       1,258       5,236
                                    ----------  ----------  ----------  ----------  ----------  ----------  ----------
                                    $6,195,511  $4,663,665  $2,380,317  $1,867,445  $1,355,140  $1,793,334  $1,266,174
                                    ==========  ==========  ==========  ==========  ==========  ==========  ==========

   Per Unit Balance Sheet Data(1)
     Book value                     $    4,309  $    3,106  $    1,408  $    1,017  $      883  $      946  $      807
     Value assigned for purpose
      of the roll-up transaction                                                                                 2,107
</TABLE>
    

   
(1)  Per unit data is based on indicated amounts allocable to limited partners
     other than Benton divided by 1,405 limited partner units outstanding.
    

                                       31
<PAGE>   45

   
        1991-1 Partnership Selected Historical Financial Data. The following
selected financial data for the 1991-1 Partnership as of and for each of the
years in the four year period ended December 31, 1994 are derived from the
1991-1 Partnership's audited financial statements. The selected consolidated
financial data for the six months ended June 30, 1994 and 1995 are derived from
the 1991-1 Partnership's unaudited financial statements. In the opinion of
management, such unaudited financial statements contain all adjustments
(consisting of only normal recurring accruals) necessary for a fair presentation
of the financial condition and results of operations as of and for the periods
presented. Operating results for the six months ended June 30, 1995 are not
necessarily indicative of the results that may be expected for the entire fiscal
year ending December 31, 1995. The selected financial data below should be read
in conjunction with the 1991-1 Partnership's financial statements and related
notes thereto and Management's Discussion and Analysis of Financial Condition
and Results of Operations included elsewhere in this Proxy Statement/Prospectus.
    

   
<TABLE>
<CAPTION>
                                                                                                    Six Months Ended
                                      Inception to           Years Ended December 31                     June 30
                                       December 31     -------------------------------------     ----------------------
                                           1991           1992          1993          1994          1994         1995
                                           ----           ----          ----          ----          ----         ----
<S>                                    <C>             <C>           <C>           <C>           <C>          <C>      
   Operating Data
     Total revenue                     $   108,288     $ 160,321     $ 112,524     $  98,644     $ 52,188     $  44,852
     Lease operating costs
       and production taxes                 54,069        40,093        36,276        38,002       14,599        12,553
     Exploration costs                     158,016         7,245         1,284           769          515           361
     Loss on sale of oil and
       gas properties                                     61,225                                                    225
     Depletion, impairment
       and amortization                    125,742        65,241        60,503        95,497       32,435       119,437
     General and administrative             20,925        28,876        45,195        28,823       25,981        30,500
                                       -----------     ---------     ---------     ---------     --------     ---------
       Net loss                        ($  250,464)    ($ 42,359)    ($ 30,734)    ($ 64,447)    ($21,342)    ($118,224)
                                       ===========     =========     =========     =========     ========     =========
     Net increase (decrease)
       in cash and cash equivalents    $ 1,233,019     ($955,826)    ($100,013)    ($117,010)    ($54,775)    $  22,377
     Net cash provided by (used in)
       operating activities                 (7,849)       85,839        38,782        28,758       11,544         1,438
     Distributions                          27,900       111,600       115,292       127,205       56,546            --

   Per Unit Operating Data (1)
     Net income (loss)                        (914)         (243)         (146)         (256)         (87)         (422)
     Distributions of earnings                  --            --            --            --           --            --
     Distributions representing
       a return of capital                     100           400           400           300          200            --
</TABLE>
    

   
<TABLE>
<CAPTION>
                                                       December 31,                        June 30,
                                   ----------------------------------------------    --------------------
                                      1991         1992        1993         1994       1994        1995
                                      ----         ----        ----         ----       ----        ----
<S>                                <C>           <C>         <C>         <C>         <C>         <C>     
Balance Sheet Data
  Cash and cash equivalents        $1,233,019    $277,193    $177,180    $ 60,170    $122,405    $ 82,547
  Total assets at book value        1,815,157     777,067     631,041     439,389     553,153     321,165
  Total assets at the
    value assigned for purposes
    of roll-up transaction                                                                        692,349
  Total liabilities                   884,131          --          --          --          --          --

General and Limited
Partner's Equity:
      Managing General Partner         18,413      43,394      50,358      13,601      52,514      12,820
      Participants                    912,292     732,846     580,591     425,503     500,531     307,888
      Special Limited Partners            321         827          92         285         108         457
                                   ----------    --------    --------    --------    --------    --------
                                   $  931,026    $777,067    $631,041    $439,389    $553,153    $321,165
                                   ==========    ========    ========    ========    ========    ========
Per Unit Balance Sheet Data(1)
  Book value                       $    3,270    $  2,627    $  2,081    $  1,525    $  1,794    $  1,104
  Value assigned for
    purpose of the roll-up
    transaction                                                                                     2,456
</TABLE>
    


   
(1)  Per unit data is based on indicated amounts allocable to limited partners
     other than Benton divided by 279 limited partner units outstanding.
    

                                       32
<PAGE>   46
                         CERTAIN COMPARATIVE INFORMATION

   
        The following table sets forth certain unaudited comparative per Unit
and per share data based on (i) the Financial Statements of the 1989-1
Partnership, the 1990-1 Partnership, the 1991-1 Partnership and Benton at and
for the six months ended June 30, 1995 and the year ended December 31, 1994, and
(ii) the unaudited pro forma financial information for Benton presented
elsewhere in this Prospectus. The equivalent pro forma information for the
Partnerships and Benton is based on a primary share computation and assumes that
each of the Partnerships will approve the Proposals pursuant to the terms
contained herein. The equivalent pro forma information for the 1989-1
Partnership reflects the pro forma per share values of 107 shares of Common
Stock issuable per 1989-1 Unit; the equivalent pro forma information for the
1990-1 Partnership reflects the pro forma per share values of 81 shares of
Common Stock issuable per 1990-1 Unit; and the equivalent pro forma information
for the 1991-1 Partnership reflects the pro forma per share values of 95 shares
of Common Stock issuable per 1991-1 Unit.
    

   
<TABLE>
<CAPTION>
                                               At or for the Six Months Ended    At and for the Year Ended
                                                       June 30, 1995                 December 31, 1994
                                               ------------------------------   ----------------------------
                                                                 Equivalent                      Equivalent
                                                 Historical     Pro Forma(1)    Historical      Pro Forma(1)
                                                 ----------     ------------    ----------      ------------
<S>                                               <C>             <C>            <C>             <C>
1989-1 PARTNERSHIP:   
        Book value per 1989-1 Unit .......        $ 1,099         $   398        $ 1,398             N/A
        Cash distributions per 1989-1 Unit             --              --            162              --
        Net income (loss) per 1989-1 Unit            (300)             12           (149)        $    12(2)

1990-1 PARTNERSHIP:
        Book value per 1990-1 Unit .......        $   807         $   301        $   883             N/A
        Cash distributions per 1990-1 Unit             --              --             66              --
        Net income (loss) per 1990-1 Unit             (76)              9            (68)        $     9(2)

1991-1 PARTNERSHIP:
        Book value per 1991-1 Unit .......        $ 1,104         $   353        $ 1,525             N/A
        Cash distributions per 1991-1 Unit             --              --            300              --
        Net income (loss) per 1991-1 Unit            (422)             10           (256)        $    10(2)

BENTON OIL AND GAS:
        Book value per common share ......        $  3.70         $  3.72        $  3.54             N/A
        Net income per share .............           0.12            0.11           0.12         $  0.11(2)
        Dividends per common share .......             --              --             --              --
</TABLE>
    

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

(1)  Equivalent pro forma data assumes that each of the Partnerships accepts the
     Exchange Offer and each of the participants elects to receive Benton Common
     Stock in exchange for their Units.

   
(2)  Equivalent pro forma net income per share and per Unit for the year ended
     December 31, 1994 is based on pro forma income before roll-up expenses and
     payments. The equivalent pro forma amounts based on net income after
     roll-up expenses and payments is $0 per 1989-1 Unit, $0 per 1990-1 Unit, $0
     per 1991-1 Unit and $0 per Benton common share.
    

                                       33
<PAGE>   47

                    RISK FACTORS AND MATERIAL CONSIDERATIONS

        In addition to the material contained elsewhere herein, the following
factors should be carefully considered.

RISKS RELATED TO THE EXCHANGE OFFER

        Elimination of Cash Distributions. The Exchange will result in the
Investors holding shares of Common Stock of Benton. Benton has paid no cash
dividends on its Common Stock and does not anticipate paying cash dividends on
its Common Stock in the foreseeable future. The cash distributions paid by the
1989-1 Partnership, the 1990-1 Partnership and the 1991-1 Partnership were $54,
$22 and $100 per $5,000 Unit, respectively, for each of the first three quarters
of 1994 and none of the Partnerships made cash distributions in the fourth
quarter of 1994 or in 1995. Despite the elimination of cash distributions to the
Partners in connection with the Exchange, Benton believes that if the
Partnerships were to continue operations, the cash distributions that Investors
would receive from the Partnerships would rapidly decline as the reserves of the
Partnerships are depleted.

   
        Potential Decline in Market Price of the Common Stock. The Exchange
Values, together with the cumulative distributions paid by the Partnerships,
reflect a loss on an Investor's initial investment of $676, $1,165 and $1,344
per 1989-1 Unit, 1990-1 Unit and 1991-1 Unit, respectively. Investors will be
exposed to a greater loss on their investment if the market price for the Common
Stock declines below the Unit Exchange Price. The market price for the Common
Stock fluctuated during 1994 from a high of $9.125 per share to a low of $4.25
per share, with an average daily trading volume of 163,855 shares, and has
fluctuated from a high of $15.13 per share to a low of $8.63 per share during
1995. See "Price Range of Common Stock, Dividends and Distributions." There may
be a large number of shares of Common Stock offered for sale immediately after
the Closing Date for various reasons, including the liquidity that the Exchange
will afford to Investors, who have not had access to a trading market for the
Partnership Units and may wish to liquidate their investment at the first
opportunity. This may tend to lower the market price for the Common Stock. Any
return to depressed conditions in the oil and gas industry in general and the
effect of those conditions on Benton in particular could also adversely affect
the market price of the Common Stock. A downturn in the general economic and
stock market conditions or in the drilling record and production performance of
Benton or results of operations for Benton that are lower than expected by the
marketplace could be expected to have a similar impact on the Common Stock. The
number of shares of Common Stock offered in exchange for Partnership Units has
been determined by dividing the Exchange Value of the tangible assets of the
Partnerships by the Common Stock Exchange Price of $11.00, subject to rounding
adjustments. The Common Stock Exchange Price is based upon the average closing
price of the Company's Common Stock, as reported by NASDAQ National Market, for
the 20 trading days from August 14, 1995 through September 11, 1995, and will
not be adjusted to reflect any subsequent increase or decrease in the market
price of the Common Stock after that date, except to the extent required by
dissenters' rights for California residents. See "The Exchange Offer and
Proposal--Dissenters' Rights."
    

   
        Lack of Arm's Length Negotiations to Determine Value of Partnership
Units. The Exchange Values of the Partnership Units ($1,312 for 1989-1 Units,
$2,107 for 1990-1 Units and $2,456 for 1991-1 Units) were determined by Benton
based, in part, on the estimated present value of each of the Partnerships'
Proved Reserves and Benton's valuation of the General Intangibles of each
Partnership (as described herein) and, as a result of Benton's inherent conflict
of interests and uncertainties involved in estimating reserve quantities and
values, may not reflect the value of the oil and gas properties and other 
    

                                       34
<PAGE>   48

   
assets of each of the Partnerships if all such assets were sold to an
unaffiliated third party in an arm's length transaction. See "Uncertainties in
the Method of Determining Exchange Values" and "Valuation Conflict of Interest"
below. While Benton believes that the methodology employed in determining the
Exchange Values is fair to Investors, resulting in valuations that exceed the
estimated liquidation values of each of the Partnerships ($294,634 for the
1989-1 Partnership, $1,052,601 for the 1990-1 Partnership and $240,998 for the
1991-1 Partnership), these liquidation values were determined by Benton, without
an independent appraisal of such liquidation values.
    

        Uncertainties in the Method of Determining Exchange Values. While Benton
believes that the method of determining the Exchange Values represents a fair,
reasonable and proper method of valuing the Partnership Units, the method of
determining the Exchange Values is subject to various uncertainties and may have
resulted in a valuation that would differ from offers made by independent
bidders. The components of the Exchange Value and the factors underlying these
uncertainties are described below.

   
                Other Assets and Liabilities. The method of determining the
        Exchange Values takes into account the estimated value of other assets
        and liabilities of each of the Partnerships as of June 30, 1995. In
        calculating the Exchange Values, the net book value of current assets
        and liabilities of the respective Partnerships was derived from that
        Partnership's unaudited balance sheet as of June 30, 1995, prepared on
        the accrual basis. The value of the Partnerships' wells and other
        equipment was derived from the respective Partnership's tax-basis
        balances at year end. These balances reflect the cost of the equipment
        less accumulated depreciation for tax accounting purposes. The tax-basis
        value of the equipment and the balance sheet book value of current
        assets and liabilities used by Benton in the calculation of Exchange
        Values may be higher or lower than the fair market value of those assets
        and liabilities.
    

                Subsequent Events. Exchange Values will not be adjusted to
        reflect changes in the present value of the estimated future net cash
        flows attributable to the Proved Reserves of the Partnerships after
        December 31, 1994, although oil and gas prices in subsequent periods may
        differ from the prices used on the date of the reserve reports.

        No Fractional Shares. No fractional shares will be issued in connection
with the Exchange Offer. An Investor who would otherwise be entitled to a
fractional share of Common Stock will be paid cash in lieu of such fractional
shares. Warrants issued in connection with the Exchange Offer will be rounded to
the nearest whole number of Warrants and no fractional interest will be issued.

        Potential Benefits of Alternatives to the Exchange. Instead of proposing
the Exchange, Benton could instead continue to operate the Partnerships, or with
the approval of the Investors of each of the Partnerships, seek to liquidate the
Partnerships' assets and distribute the liquidation proceeds in accordance with
the provisions of the Partnership Agreements, enabling Investors to reinvest
proceeds from the asset sales in the case of a liquidation and avoid the market
risks associated with the ownership of Benton Common Stock to be received in the
Exchange. Both alternatives were rejected by Benton based on its analysis of
their comparative results and values. Benton believes that continuation of the
Partnerships would result in substantial additional reductions in the cash
distribution rates for each of the Partnerships due primarily to expected
production declines from depletion of reserves. Benton's analysis of continuing
the Partnerships in light of these factors, based on average oil and gas prices
received in 1994 and reserve data as of December 31, 1994, reflects declines in
annual distribution rates (i) per 1989-1 Unit from $600 in 1993 to $162 in 1994,
to $114 in 1995, to $146 in 1996, to $91 in 1997 and $7 in 1998, (ii) per 1990-1
Unit from $400 in 1993 to $66 in 1994, to $97 in 1995, to $119 in 1996, to $76
in 1997 and $30 in 1998, and (iii) per 1991-1 Unit from $400 in 1993 to $300 in
1994, to $61 in 1995, to 

                                       35
<PAGE>   49

$83 in 1996, to $40 in 1997 and to $0 in 1998. However, each Partnership's
future performance will depend on actual oil and gas prices and production
levels, which could materially affect Benton's continuation analysis in either
direction. In addition, the liquidation values estimated by Benton were based on
an actual third party offer received by Benton for the purchase and sale of the
Umbrella Point Field. These liquidation valuations estimated by Benton could,
however, prove to be incorrect since the estimates are based on various pricing
and other market related assumptions.

   
        Necessity for Effective Registration Statement for Exercise of Warrants.
An Investor in the Partnerships who receives Warrants in connection with the
Exchange Offer must exercise those Warrants pursuant to an effective
Registration Statement filed by Benton with the Securities and Exchange
Commission. In addition, Benton will be required to comply with the state
securities laws of each state in which a Warrant holder is a resident prior to
permitting the exercise of the Warrants by such Investor. If Benton is unable to
register or comply with an exemption from registration requirements under state
or federal securities laws, Benton will not be permitted to issue shares of
Benton Common Stock upon exercise of the Warrants. Benton intends to immediately
file with the Securities and Exchange Commission a Registration Statement
covering the exercise of Warrants by the Investors and will take all reasonable
steps to insure that such Registration Statement remains effective throughout
the term of the Warrants, pursuant to provisions of the Warrant Agreement.
However, there can no assurance that such a Registration Statement will be
effective at a time when a holder seeks to exercise his Warrant. The absence of
an effective Registration Statement will not extend the term of the Warrants.
Thus, an Investor who receives Warrants in connection with the Exchange Offer
may not be able to exercise such Warrants when he or she so desires, if there is
no effective Registration Statement with the Securities and Exchange Commission
or if Benton has failed to register or perfect an exemption under state
securities laws. Because Benton is required under the Warrant Agreement to
maintain an effective Registration Statement and comply with the state
securities laws, an Investor could seek appropriate legal remedies for Benton's
failure to fulfill this contractual obligation.
    

        Inherent Uncertainties in Estimating Reserves and Future Net Cash Flows.
The present value of estimated future net cash flows from the Proved Reserves of
the Partnerships, a significant factor considered in determining the Exchange
Values, cannot be determined with a high degree of certainty. There are numerous
uncertainties inherent in estimating quantities of Proved Reserves and on
projecting future rates of production, future development, recompletion and
workover expenditures, prices to be received upon the sale and costs to be
incurred in production. The data set forth in the audit letter which summarizes
the reserve report for each of the Partnerships included in Exhibit B to this
Prospectus represent estimates only and may vary materially from the quantities
of oil and gas actually recovered and the future net cash flows received upon
the sale thereof. Benton's use of these estimates in determining the Exchange
Values for the Partnerships could therefore result in an undervaluation of the
Partnership Units.

        Valuation Conflict of Interest. The determination of the Exchange Values
by Benton involves a conflict of interest because of Benton's duties as Managing
General Partner of the Partnerships and its purchase of the assets. Accordingly,
Benton's determination may not reflect the value of the Partnership's net assets
if all such assets were sold to an unaffiliated third party in an arm's length
transaction. As Managing General Partner of the Partnerships, Benton owes
fiduciary duties to the Investors, and also owes a duty to the stockholders of
Benton. While Benton believes that it has fulfilled these obligations in its
determination of the Exchange Values, no degree of objectivity or professional
competence can eliminate the inherent conflict of interest.

                                       36
<PAGE>   50

         Lack of Independent Representative; No Fairness Opinion. Benton did not
engage an independent representative to negotiate the terms of the Exchange
Offer on behalf of the Investors. As a result, the Exchange Values and other
terms of the Exchange Offer may not be as favorable as the terms that an
independent representative might have obtained. In addition, Benton did not
retain an independent third party to render an opinion with regard to the
fairness of the Exchange Offer to the Investors and the Partnerships.

   
        Limited Dissenters' Rights. Investors residing in states other than
California will not be afforded any dissenters' or appraisal rights. Under the
rules adopted by the NASD, Investors in roll-up transactions such as the
Exchange Offer are entitled to certain dissenters' rights unless the sponsor
adopts a 75% approval requirement for the transaction or other procedures
designed to protect the rights of Investors. Although adoption of the Proposals
by each of the Partnerships would require the consent under the Partnership
Agreements of the holders of only a majority of the Partnership Units, the
Managing General Partner has adopted a 75% approval procedure instead of
providing dissenters' rights.
    

   
        Effects of Dissenters' Rights on California Investors. Investors
residing in California will be afforded limited dissenters' rights in accordance
with the requirements for roll-up transactions under Section 25014.7 of the
California Code. By voting against the Proposal, Investors in the State of
California will be deemed to exercise their dissenters' rights and will receive
the number of shares of Common Stock and Warrants equal to the Exchange Value of
their interests divided by the closing price of the Common Stock on the
NASDAQ-NMS during the twenty days immediately after the Closing Date. If that
average price is lower than the Exchange Price, dissenting California Investors
will receive more shares of Common Stock and Warrants than they would otherwise
receive in the Exchange Offer. IF, HOWEVER, THE AVERAGE PRICE IS HIGHER THAN THE
EXCHANGE PRICE A DISSENTING INVESTOR WOULD RECEIVE FEWER SHARES OF COMMON STOCK
AND WARRANTS. See Exhibit E to this Prospectus. California Investors hold a 
substantial portion of the interests in the 1989-1 Partnership, the 1990-1 
Partnership and the 1991-1 Partnership and the impact of the exercise of 
dissenters' rights could materially increase or decrease the number of shares 
of Common Stock issued by Benton in connection with the Exchange Offer.
    

        Risks Relating to Certain Federal Income Tax Considerations. Upon
consummation of the Exchange, Investors will recognize gain in the amount equal
to the excess of the fair market value of the Common Stock and Warrants received
by them over their respective bases in the Partnership Units they hold. Further,
the Internal Revenue Service may seek to recharacterize the transaction as a
transfer of assets by the Partnerships in exchange for Common Stock and Warrants
and subsequent liquidation of the Partnerships and distribution of their
remaining assets. Such a recharacterization of the transaction may adversely
affect the characterization of income recognized by Investors upon consummation
of the Exchange. In addition, under such circumstances, the tax consequences
realized by an Investor consenting to the Exchange may differ from that realized
by Investors who do not participate in the Exchange but rather receive Common
Stock and Warrants upon liquidation of the Partnerships.

RISKS RELATED TO BENTON

   
        Losses From Operations. The historical financial data for Benton reflect
net losses of $2,909,335 and $4,828,590 for the years ended December 31, 1992
and 1993, respectively and net income of $2,954,161 for the year ended December
31, 1994, and $3,151,601 for the six months ended June 30, 1995. Benton had
total revenues of $8,622,109, $7,503,796 and $34,704,806 for the years ended
December 31, 1992, 1993 and 1994, respectively, and $12,160,025 and $25,870,396
for the six months ended June 30, 1994 and 1995, respectively. The decreased
revenues for the year ended December 31, 1993 compared to the year ended
December 31, 1992 was due in part to the sale by Benton of certain 
    

                                       37
<PAGE>   51

non-strategic oil and gas properties. During 1992 and 1993, Benton made a
significant amount of capital expenditures for infra-structure, production
facilities, pipelines and 3-D seismic surveys. Such expenditures did not
immediately increase production from Benton's oil and gas properties. However,
Benton believes that with this infra-structure complete, Benton will focus its
capital expenditures on development of its oil and gas properties, which Benton
expects will continue the trend of increased revenues from the year ended
December 31, 1994 to December 31, 1995. As Benton's revenues increase, and the
capital expenditures related to infra-structure decrease, Benton expects to
improve its profitability. Benton's ability to maintain its financing
arrangements, produce its oil and gas reserves and service its debt obligations
would be adversely affected by a lack of profitability. Any improvement in
profitability of Benton will be dependent upon improvement in the development of
reserves, revenues from the sale of oil and gas reserves and oil and gas
pricing, and there can be no assurance that such improvement will occur.
Consummation of the Exchange Offer with all of the Partnerships will result in
significant expenses recorded by Benton. See "Unaudited Pro Forma Financial
Information."

        Foreign Operations. During 1994, Benton derived approximately 78% of its
consolidated oil and gas revenues and approximately 97% of its Proved Reserves
from its foreign operations in Venezuela and Russia. Benton's Venezuelan and
Russian operations are subject to political, economic and other uncertainties
inherent in the development of foreign properties including, without limitation,
risks of war, revolution, expropriation, cancellation, renegotiation or
modification of existing contracts, export and transportation regulations and
tariffs, taxation and royalty policies, foreign exchange restrictions, adverse
changes in currency value, international monetary fluctuations, environmental
controls and other hazards arising out of foreign governmental sovereignty over
certain areas in which Benton plans to conduct operations.

        Benton's operations have not been materially affected to date by
political instability or the recent banking crisis in Venezuela. Similarly, to
date, Benton's operations have not been materially adversely affected by the
recent political or economic instability in Russia. However, there can be no
assurance that Benton's operations will not be materially adversely affected by
political or economic instability or burdensome taxation in the future. Benton
currently carries no insurance against political instability. However, Benton
has applied for insurance to cover the risk of currency inconvertibility for its
Venezuelan operations with the Overseas Private Investment Corporation ("OPIC"),
an agency of the United States government. There can be no assurance that Benton
will be able to obtain this insurance.

        Benton has limited experience in conducting oil and gas operations in
Venezuela and Russia. Benton formed ventures with local partners in Venezuela
and Russia in an attempt to reduce some of the risks associated with conducting
operations in such countries and to facilitate local transactions. Benton may
encounter unforeseen difficulties in Venezuela and Russia, including problems
related to production and deliverability of oil and gas, and any such
difficulties could have a material adverse effect on Benton.

        Furthermore, the timing and extent of Benton's development activities in
Venezuela are subject to the approval of Lagoven and the Ministry of Energy and
Mines. There can be no assurance that the development activities proposed by
Benton-Vinccler will receive the necessary approval. In addition, pursuant to
the Articles of Incorporation/By-Laws of Benton-Vinccler, the consent of both
Benton and Vinccler is a prerequisite to certain corporation transactions and
other matters relating to Benton-Vinccler, including, without limitation, any
sale of corporate assets, any assignment or sub-contracting of the operating
service agreement with Lagoven, any change in Benton-Vinccler's corporate
capital, duration or corporate purpose, any merger between Benton-Vinccler and
another company as well as 

                                       38
<PAGE>   52

certain amendments to Benton-Vinccler's Articles of Incorporation/By-Laws. There
can be no assurance that Benton and Vinccler will agree upon any such proposed
transactions or matters.

        In addition to the factors discussed above, Russia has established an
export tariff on all oil exported from Russia, which, as imposed, has the effect
of reducing the cash flows and potential profits to Benton. However, Russia has
issued or drafted various decrees and legislation under which certain oil and
gas ventures, including GEOILBENT, are eligible for relief from such oil export
tariff until such time as they have recovered their capital investment.
GEOILBENT has received a waiver from the export tariff for 1995, and expects to
apply for renewal of such waiver for 1996 and 1997. However, there can be no
assurance that any such renewals can be obtained. Furthermore, after the waiver
for 1995 was issued to GEOILBENT, a new Russian law came into force which
repeals all tax and custom benefits previously granted to participants in
foreign economic activities, except for those granted pursuant to certain
federal laws, including the law "On Customs Tariff." While it is not clear
whether the repeal applies to GEOILBENT's waiver for 1995, GEOILBENT believes
that its waiver should be regarded as granted pursuant to the law "On Customs
Tariff." The legislative and regulatory environment in Russia continues to be
subject to frequent change and uncertainty.

        In addition, the license which grants GEOILBENT the right to develop the
North Gubkinskoye Field sets forth required levels of oil and gas production
through the year 2000 and requires GEOILBENT to make additional royalty payments
in the event that such production levels are not achieved during any three year
period. As a result of the recent volatility in net wellhead oil prices and the
export tariff, GEOILBENT's production for 1994 was significantly lower than that
required for 1994, and, if such adverse conditions were to continue, GEOILBENT
might produce significantly less oil and gas than required under the license
during the next few years, which could result in GEOILBENT paying significantly
higher royalties under the license.

   
        Benton will not receive distributions from GEOILBENT until it has
expended its capital requirements under the terms of the joint venture
agreement. As of September 15, 1995, Benton has spent approximately $24.4
million of the $25.8 million it has committed to spend by the end of 1995.
However, oil and gas production in Russia has been adversely affected by recent
volatility of net wellhead oil prices and the oil export tariff. If these
conditions continue, Benton believes that the joint venture agreement may be
modified to reduce that amount or to extend the due date of its obligation and
modify other terms. Benton believes that after it has satisfied such capital
commitments, it will not receive any significant distributions from GEOILBENT
for several years because substantially all of the money received by GEOILBENT
from the North Gubkinskoye Field will be reinvested to fund future development
activities.
    

        Properties Under Development. As of December 31, 1994, approximately 79%
of Benton's Proved Reserves were undeveloped and required development activities
consisting primarily of recompletions, drilling of replacement wells and other
development drilling. In addition, approximately 3% of Benton's Proved Reserves
were proved developed behind-pipe or shut-in, requiring additional development
work. As a result, Benton will require substantial capital expenditures to
develop all of its proved reserves. At December 31, 1994, the anticipated future
development costs for Proved Reserves in Venezuela, Russia and the United States
were $79.5 million, $25.4 million and $2.0 million, respectively. Benton does
not have the capital to develop all of these reserves. Benton expects to finance
these future development costs through cash flow from operations, sales of
property interests, non-recourse project financing and the offering of debt or
equity securities. If such capital is not available, Benton will either enter
into joint ventures to develop the projects, which will result in Benton
retaining a smaller interest, or not develop the reserves. There can be no
certainty regarding the commercial 

                                       39
<PAGE>   53

feasibility of developing these reserves, the availability of financing, or the
timing or costs associated therewith. If such capital is available, there can be
no assurance that the Company will be able to develop and produce sufficient
reserves to recover the costs expended and operate the wells profitability. In
addition, Benton may not be able to control the development activities in fields
either operated by industry partners or in which development activities are
subject to approval by its partners. If Benton and its industry partners are not
able to meet the financial and development obligations in these fields, the
interests in the affected properties may be sold, farmed out or forfeited.

        Engineers' Estimates of Reserves and Future Net Revenue. This
Prospectuses contains or incorporates by reference estimates of Benton's oil and
gas reserves and the future net revenues therefrom which have been prepared by
Benton and audited by Huddleston & Co., Inc., independent petroleum engineers.
Estimates of commercially recoverable oil and gas reserves and of the future net
cash flows derived therefrom are based upon a number of variable factors and
assumptions, such as historical production from the subject properties,
comparison with other producing properties, the assumed effects of regulation by
government agencies and assumptions concerning future operating costs, severance
and excise taxes, export tariffs, abandonment costs, development costs and
workover and remedial costs, all of which may vary considerably from actual
results. All such estimates are to some degree speculative, and various
classifications of reserves are only attempts to define the degree of
speculation involved. For these reasons, estimates of the commercially
recoverable reserves of oil and natural gas attributable to any particular
property or group of properties, the classification, cost and risk of recovering
such reserves and estimates of the future net cash flows expected therefrom,
prepared by different engineers or by the same engineers at different times, may
vary substantially. The difficulty of making precise estimates is accentuated by
the fact that 82% of Benton's total Proved Reserves were non-producing as of
December 31, 1994. Therefore, Benton's actual production, revenues, severance
and excise taxes, export tariffs, development expenditures, workover and
remedial expenditures, abandonment expenditures and operating expenditures with
respect to its reserves will likely vary from such estimates, and such variances
may be material.

        In addition, actual future net cash flows will be affected by factors
such as actual production, supply and demand for oil and natural gas,
availability and capacity of gas gathering systems and pipelines, curtailments
in consumption by natural gas purchasers, changes in governmental regulations or
taxation and the impact of inflation on costs. The timing of actual future net
revenues from proved reserves, and thus their actual present value, can be
affected by the timing of the incurrence of expenditures in connection with
development of oil and gas properties. The 10% discount factor, which is
required by the SEC to be used to calculate present value for reporting
purposes, is not necessarily the most appropriate discount factor based on
interest rates in effect from time to time and risks associated with the oil and
gas industry. Discounted present value, no matter what discount rate is used, is
materially affected by assumptions as to the amount and timing of future
production, which may and often do prove to be inaccurate.

        Development of Additional Reserves. Benton's future success may also
depend upon its ability to find or acquire additional oil and gas reserves that
are economically recoverable. Except to the extent that Benton conducts
successful exploration or development activities or acquires properties
containing proved reserves, the proved reserves of Benton will generally decline
as reserves are produced. There can be no assurance that Benton will be able to
discover additional commercial quantities of oil and gas, or that Benton will be
able to continue to acquire interests in underdeveloped oil and gas fields and
enhance production and reserves by conducting workovers and recompletions,
drilling replacements wells and drilling development wells, or that Benton will
have continuing success drilling productive wells and acquiring underdeveloped
properties at low finding costs.

                                       40
<PAGE>   54
   
        Litigation. On June 13, 1994, certain partners in the Partnerships and
certain other Investors in oil and gas limited partnerships sponsored by Benton
filed suit against Benton in the Ventura Superior Court. The allegations in the
complaint related to Benton's operation of the Partnerships and original sale of
the Partnership Units. In an effort to resolve the concerns raised by these
partners, Benton agreed to submit the matter to arbitration, conditioned upon
the execution of a mutually satisfactory arbitration agreement. After
discussions between Benton and the agent for the partners failed to produce a
satisfactory arbitration agreement, Benton filed an answer to the complaint. The
parties have now voluntarily dismissed the action and submitted the issues and
claims to arbitration. Benton believes that the allegations made by the partners
in the arbitration are without merit and intends to vigorously defend this
action.
    
In addition, Investors in partnerships which were sponsored by a third party
have sued Benton on the theory that since it provided oil and gas drilling
prospects to those partnerships and operated substantially all of their
properties, it was responsible for alleged violations of securities laws in
connection with the offer and sale of interests, contractual breach of fiduciary
duty and fraud. See "The Exchange Offer and Proposal--Litigation and Related
Matters."

        Retention and Attraction of Key Personnel. Benton depends to a large
extent on the abilities and continued participation of certain key employees,
the loss of whose services could have a material adverse effect on Benton's
business. In an effort to minimize the risk, Benton has entered into employment
agreements with certain key employees, and has purchased a $5.0 million key-man
life insurance policy on the life of A.E. Benton. Furthermore, as a result of
Benton's recent growth, Benton currently is seeking additional accounting and
operating personnel. There can be no assurance that Benton will be able to
attract and retain such personnel on acceptable terms and the failure to do so
could have a material adverse effect on Benton.

RISKS RELATED TO THE OIL AND GAS INDUSTRY

        Risk of Oil and Gas Operations. Benton's operations are subject to all
of the risks normally incident to the operation and development of oil and gas
properties and the drilling of oil and gas wells, including encountering
unexpected formations or pressures, blowouts, cratering and fires, and, in
horizontal wellbores, the increased risk of mechanical failure and collapsed
holes, the occurrence of any of which could result in personal injuries, loss of
life, environmental damages and other damage to the properties of Benton or
others. In addition, because Benton acquires interests in underdeveloped oil and
gas fields that have been operated by others for many years, Benton may be
liable for any damage or pollution caused by any prior operations of such oil
and gas fields. Moreover, offshore operations are subject to a variety of
operating risks peculiar to the marine environment--such as hurricanes or other
adverse weather conditions--to more extensive governmental regulation, including
certain regulations that may, in certain circumstances, impose absolute
liability for environmental damage, and to interruption or termination of
business activities by government authorities based upon environmental or other
considerations. In accordance with customary industry practice, Benton is not
fully insured against these risks, nor are all such risks insurable.
Accordingly, there can be no assurance that such insurance as Benton does
maintain will be adequate to cover any losses or exposure for liability.

        Current Oil and Gas Industry Conditions. Historically, the markets for
oil and natural gas have been volatile and are likely to continue to be volatile
in the future. Prices for oil and natural gas are subject to wide fluctuation in
response to relatively minor changes in supply of and demand for oil and natural
gas, market uncertainty and a variety of additional factors that are beyond the
control of Benton. These factors include political conditions in the Middle
East, the foreign supply of oil and natural gas, 

                                       41
<PAGE>   55

the price of foreign imports, the level of consumer product demand, weather
conditions, domestic and foreign governmental regulations, the price and
availability of alternative fuels and overall economic conditions. Lower oil and
natural gas prices also may reduce the amount of Benton's oil and natural gas
that is economic to produce. In addition, the marketability of Benton's
production depends upon the availability and capacity of gas gathering systems
and pipelines.

        Government Regulation; Environmental Risks. Benton's business is
regulated by certain federal, state, local and foreign laws and regulations
relating to the development, production, marketing and transmission of oil and
gas, as well as environmental and safety matters. There can be no assurance that
laws and regulations enacted in the future will not adversely affect Benton's
exploration for, or the production and marketing of, oil and gas.

        Oil and gas operations are subject to extensive foreign, federal, state
and local laws regulating the discharge of materials into the environment or
otherwise relating to the protection of the environment. Numerous governmental
departments issue rules and regulations to implement and enforce such laws which
are often difficult and costly to comply with and which carry substantial
penalties for failure to comply. The regulatory burden on the oil and gas
industry increases its cost of doing business and consequently affects its
profitability. These laws, rules and regulations affect the operations of
Benton. Compliance with environmental requirements generally could have a
material adverse effect upon the capital expenditures, earnings or competitive
position of Benton.

        Competition. The oil and gas exploration and production business is
highly competitive. A large number of companies and individuals engage in the
drilling for oil and gas, and there is a high degree of competition for
desirable oil and gas properties suitable for drilling and for materials and
third-party services essential for their exploration and development. Many of
Benton's competitors have greater financial and other resources than does
Benton.

                                       42
<PAGE>   56

            PRICE RANGE OF COMMON STOCK, DIVIDENDS AND DISTRIBUTIONS

Benton's Common Stock is traded on the National Association of Securities
Dealers, Inc.--Automated Quotation System ("NASDAQ-NMS") under the symbol
"BNTN." There is no public market for the Partnership Units. The following table
sets forth, for the calendar years indicated, the high and low sales prices for
the Common Stock reported on the American Stock Exchange through September 8,
1993 and thereafter on the NASDAQ-NMS.

   
<TABLE>
<CAPTION>
YEAR                                                      HIGH              LOW
- ----                                                      ----              ---
<S>                                                   <C>               <C>        
1992
   First Quarter                                      $     11.13       $      7.63
   Second Quarter                                            9.00              6.88
   Third Quarter                                             8.50              5.00
   Fourth Quarter                                            6.63              5.00

1993
   First Quarter                                             8.25              5.50
   Second Quarter                                           10.25              7.63
   Third Quarter                                             9.38              6.50
   Fourth Quarter                                            7.63              3.88

1994
   First Quarter                                             7.00              4.25
   Second Quarter                                            7.63              5.38
   Third Quarter                                             7.75              6.50
   Fourth Quarter                                            9.13              7.00

1995
   First Quarter                                            11.13              8.63
   Second Quarter                                           15.13             10.25
   Third Quarter (through September 30)                     13.88              9.50
</TABLE>
    

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

        Benton's policy is to retain its earnings to support the growth of
Benton's business. Accordingly, the Board of Directors of Benton has never
declared cash dividends on its Common Stock and does not plan to do so in the
foreseeable future. Furthermore, the terms of Benton's debt agreements prohibit
the payment of cash dividends on Benton's Common Stock.

        The Partnerships do make cash distributions to the Investors from
Partnership cash flow. The following table sets forth the amount of cash
distributions paid per Unit by each Partnership to its Investors during the
periods indicated.

                                       43
<PAGE>   57

<TABLE>
<CAPTION>
PARTNERSHIP        1989        1990         1991        1992        1993         1994       1995
- -----------        ----        ----         ----        ----        ----         ----       ----
<C>                <C>         <C>          <C>         <C>         <C>          <C>         <C>
1989-1              $0         $500         $747        $1,003      $600         $162        $0

1990-1             N/A         $  0         $500        $  762      $400         $ 66        $0

1991-1             N/A         N/A          $100        $  400      $400         $300        $0
</TABLE>

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

   
        The last cash distribution made by any of the Partnerships was in August
1994. The reasons for the lack of distributions include (i) declining oil and
gas production combined with higher lease operating expenses and production
taxes for 1994, compared to 1993; (ii) continued capital expenditures at the
Umbrella Point Field; and (iii) lower natural gas prices. As an example, the
Umbrella Point Field's natural gas price ranged from $1.84 to $2.77 per Mcf for
1993, compared to $1.47 to $2.42 per Mcf for 1994. During the first seven months
of 1995, natural gas prices at Umbrella Point Field have continued to decline to
a range of $1.40 to $1.75 per Mcf.
    

   
        On July 24, 1995, the last full trading day preceding the filing of
the Exchange Offer, the closing price of Benton's Common Stock on the NASDAQ-NMS
was $12.375 per share.
    

        Because the market price for Benton's Common Stock is subject to
fluctuation, the total Exchange Value that an Investor will receive in
connection with the Exchange Offer may increase or decrease prior to the
Exchange. Holders of Partnership Units are urged to obtain current market
quotations for the Benton Common Stock.

                                       44
<PAGE>   58

                          BACKGROUND OF EXCHANGE OFFER

1989-1 PARTNERSHIP
   

        The 1989-1 Partnership commenced business on September 1, 1989. Benton,
as managing general partner and sponsor of the 1989-1 Partnership, sold an
aggregate of $1,409,091 in 1989-1 Units. At June 30, 1995, total cash
distributions to holders of 1989-1 Units was $848,836. The 1989-1 Partnership
owns a 4.93% working interest in the Umbrella Point Field located in the
northern end of Upper Galveston Bay, in Texas state waters. The 1989-1
Partnership also owns a 6.57% working interest in East Cameron Block 229,
located off the coast of Grand Chenier, Louisiana in the Gulf of Mexico. As of
September 1995, the Umbrella Point Field had ten wells producing at combined
average daily rates of 312 Bbl of oil and 3.1 MMcf of natural gas. At January 1,
1995, the 1989-1 Partnership's interest in East Cameron Block 229 was determined
to be uneconomic. See "Information Concerning 1989-1 Partnership - Description
of Oil and Gas Properties."
    

        The 1989-1 Partnership has paid cumulatively $3,012 in cash
distributions per 1989-1 Unit to date. Since inception through June 30, 1995,
the 1989-1 Partnership has produced and sold approximately 238,748 Mcf of
natural gas and 31,347 Bbl of oil.

        Since 1993, the Partnership's oil production volumes have declined from
peak levels reached in 1992. Gas production began to decline in 1994. These
reductions are due to the natural decline occurring in the Umbrella Point Field,
the Partnership's most significant asset. Production volumes are expected to
decline further in subsequent periods due to ongoing depletion of the
Partnership's wells.

   
        The total amount of reserves encountered by and economically produced
from the wells acquired or drilled was substantially less than anticipated. In
addition, recent fluctuations in gas prices has impacted the 1989-1 Partnership.
Prices received for the sale of natural gas from the Umbrella Point Field, the
most significant Partnership property, ranged from $1.84 to $2.77 per Mcf during
1993, compared to $1.47 to $2.42 per Mcf during 1994. During the first seven
months of 1995, prices received for the sale of natural gas from the Umbrella
Point Field has continued to decline to a range of $1.40 to $1.75 per Mcf.
During these periods of declining natural gas prices, the 1989-1 Partnership's
cash flow was reduced while operating costs and third party costs did not
decline. Also as a result of lower natural gas prices, the amount of the 1989-1
Partnership's reserves that can be produced economically is reduced
substantially.
    

   
        In addition, many of the Investors in the 1989-1 Partnership have
expressed concern regarding the historical performance and continued operation
of the 1989-1 Partnership and its properties. See "The Exchange Offer and
Proposal--Litigation and Related Matters." In response to these concerns, the
Managing General Partner analyzed and evaluated the 1989-1 Partnership's
original objectives, current status and future prospects. The Managing General
Partner retained an independent petroleum engineer to prepare an updated
estimate of the remaining reserves of the 1989-1 Partnership properties and the
value of such reserves. In addition, the Managing General Partner made available
to third parties the 1989-1 Partnership well, production, reserve and property
information for the purpose of soliciting third party bids for the purchase of
the 1989-1 Partnership's assets. See "Recommendation of the Managing General
Partner--Managing General Partner's Determination that Exchange Offer is Fair"
for a discussion of the third party bids received by the Managing General
Partner.
    

                                       45
<PAGE>   59

        As the Private Placement Memorandum used to sell the 1989-1 Units
explained, oil and gas exploration and production have many risks, including the
risk that exploring for and producing natural gas and oil is highly speculative.
The search for oil and gas can result in unprofitable efforts not only from the
drilling of dry holes but from wells which, although initially productive, do
not produce oil and gas in sufficient amounts to return a profit on the costs
expended. In addition, there is a risk that oil and gas prices could decline and
the quantities of oil and gas discovered might not be sufficient to return the
initial investment. Based on the geological and geophysical information
available prior to the drilling and acquisition of the 1989-1 Partnership's
properties, the Managing General Partner believed that the 1989-1 Partnership's
wells would be able to provide economic benefit. However, based on the current
evaluation of the 1989-1 Partnership reserves and future prospects, the Managing
General Partner believes the most logical economic course for the limited
partners is to exchange the remaining assets as soon as possible pursuant to the
terms of the Exchange Offer.

1990-1 PARTNERSHIP

   
        The Partnership commenced business on November 29, 1990. Benton, as
managing general partner and sponsor of the 1990-1 Partnership, sold an
aggregate of $7,095,960 of 1990-1 Units. Through June 30, 1995, the Partnership
has made cash distributions in the aggregate of $2,452,364. The 1990-1
Partnership purchased an 8.4% working interest in 32 producing wells in the
Round Mountain Field, located in the San Joaquin Basin of California. The 1990-1
Partnership sold its interest in Round Mountain in September 1992. The 1990-1
Partnership owned a 38% working interest in the Hopper Canyon 12-1 well, located
in Ventura County, California. In April 1992, the 1990-1 Partnership sold its
interest in the well to Fortune Petroleum for cash and shares of common stock,
which were subsequently sold. The 1990-1 Partnership also owned a 44.67% working
interest in the North Fisher Reef No. 13-16A well. Although this prospect had
multiple objectives, all objectives were determined to be non-commercial and the
well was plugged and abandoned. The 1990-1 Partnership had a 12.5% working
interest in the Prather 43-1 well. Once the well was drilled to total depth, it
was determined to be uneconomic and was plugged and abandoned.
    

        The 1990-1 Partnership currently owns a 14.19% working interest in the
Umbrella Point Field located in the Upper Galveston Bay, in Texas state waters.
The Partnership also owns a 22.85% working interest in the East Cameron Block
229, located off the coast of Grand Chenier, Louisiana in the Gulf of Mexico. As
of September 1995, the Umbrella Point Field had ten wells producing at combined
average daily rates of 312 Bbl of oil and 3.1 MMcf of natural gas. At January 1,
1995, the 1990-1 Partnership's interest in East Cameron Block 229 was determined
to be uneconomic. See "Information Concerning 1990-1 Partnership-Description of
Oil and Gas Properties."

        The 1990-1 Partnership originally purchased a 0.38% working interest in
the West Cote Blanche Bay Field, located in a shallow bay in St. Mary Parish,
Louisiana. In 1991, the Partnership sold a 0.06% working interest in the West
Cote Blanche Bay Field to the 1991-1 Partnership. In March 1995, the Partnership
sold its 0.32% working interest in wells above the depth of approximately 10,575
feet. As of September 1995, the 1990-1 Partnership currently owns a 0.32%
working interest in 3 wells in the West Cote Blanche Bay Field which are
currently producing at a combined rate of approximately 21 MMcf of natural gas
per day. See "Information Concerning 1990-1 Partnership - Description of Oil and
Gas Properties."

   
        Beginning in 1993, the Partnership's oil production volumes have
declined from peak levels reached in 1991 and 1992. Gas production began to
decline in 1994. These reductions are due to the natural decline occurring in
the Umbrella Point Field, the Partnership's most significant asset. 
    

                                       46
<PAGE>   60

Production volumes are expected to decline further in subsequent periods due to
ongoing depletion of the Partnership's wells.

        The 1990-1 Partnership has paid cumulatively $1,728 in cash
distributions per 1990-1 Unit to date. Since inception through June 30, 1995,
the 1990-1 Partnership has produced and sold approximately 686,501 Mcf of
natural gas and 109,044 Bbl of oil.

   
        The total amount of reserves encountered by and economically produced
from the wells acquired or drilled was substantially less than anticipated. In
addition, recent fluctuations in gas prices has impacted the 1990-1 Partnership.
Prices received for the sale of natural gas from the Umbrella Point Field, the
most significant Partnership property, ranged from $1.84 to $2.77 per Mcf during
1993, compared to $1.47 to $2.42 per Mcf during 1994. During the first seven
months of 1995, prices received for the sale of natural gas from the Umbrella
Point Field has continued to decline to a range of $1.40 to $1.75 per Mcf.
During these periods of declining natural gas prices, the 1990-1 Partnership's
cash flow was reduced while operating costs and third party costs did not
decline. Also as a result of lower natural gas prices, the amount of the 1990-1
Partnership's reserves that can be produced economically is reduced
substantially.
    

   
        In addition, many of the Investors in the 1990-1 Partnership have
expressed concern regarding the historical performance and continued operation
of the 1990-1 Partnership and its properties. See "The Exchange Offer and
Proposal--Litigation and Related Matters." In response to these concerns, the
Managing General Partner analyzed and evaluated the 1990-1 Partnership's
original objectives, current status and future prospects. The Managing General
Partner retained an independent petroleum engineer to prepare an updated
estimate of the remaining reserves of the 1990-1 Partnership properties and the
value of such reserves. In addition, the Managing General Partner made available
to third parties the 1990-1 Partnership well, production, reserve and property
information for the purpose of soliciting third party bids for the purchase of
the 1990-1 Partnership's assets. See "Recommendation of the Managing General
Partner--Managing General Partner's Determination that Exchange Offer is Fair"
for a discussion of the third party bids received by the Managing General
Partner.
    

        As the Private Placement Memorandum used to sell the 1990-1 Units
explained, oil and gas exploration and production have many risks, including the
risk that exploring for and producing natural gas and oil is highly speculative.
The search for oil and gas can result in unprofitable efforts not only from the
drilling of dry holes but from wells which, although initially productive, do
not produce oil and gas in sufficient amounts to return a profit on the costs
expended. In addition, there is a risk that oil and gas prices could decline and
the quantities of oil and gas discovered might not be sufficient to return the
initial investment. Based on the geological and geophysical information
available prior to the drilling and acquisition of the 1990-1 Partnership's
properties, the Managing General Partner believed that the 1990-1 Partnership's
wells would be able to provide economic benefit. However, based on the current
evaluation of the 1990-1 Partnership reserves and future prospects, the Managing
General Partner believes the most logical economic course is to exchange the
remaining assets as soon as possible pursuant to the terms of the Exchange
Offer.

1991-1 PARTNERSHIP

   
        The Partnership commenced business on July 30, 1991. Benton, as managing
general partner and sponsor of the 1991-1 Partnership, sold an aggregate of
$1,409,091 of 1991-1 Units. At June 30, 1995, the 1991-1 Partnership had
distributed an aggregate of $338,182 to participants. The 1991-1 Partnership
owned a 38.0% working interest in the Hopper Canyon 12-1 well, located in
Ventura County, California. The 
    

                                       47
<PAGE>   61

1991-1 Partnership subsequently sold its interest in this well to Fortune
Petroleum, for cash proceeds and shares of common stock, which were subsequently
sold. The 1991-1 Partnership also owned a 17.5% working interest in the Prather
43-1 well, located in Acadia Parish, Louisiana. This well was drilled to total
depth and it was determined to be uneconomical, and was therefore plugged and
abandoned.

        The 1991-1 Partnership owns a 2.83% working interest in the Umbrella
Point Field, located in the Upper Galveston Bay, in Texas state waters. As of
September 1995, the Umbrella Point Field had ten wells producing at combined
average daily rates of 312 Bbl of oil and 3.1 MMcf of natural gas.

        The 1991-1 Partnership purchased a 0.06% working interest in the West
Cote Blanche Bay Field, located in a shallow bay in St. Mary Parish, Louisiana,
from the 1990-1 Partnership. In March 1995, the Partnership sold its 0.06%
working interest in certain depths (above approximately 10,575 feet) in the West
Cote Blanche Bay Field. The 1991-1 Partnership has a 0.06% working interest in 3
wells below the depth of approximately 10,575 feet. These wells are currently
producing at a combined rate of approximately 21 MMcf of natural gas per day.
See "Information Concerning 1991-1 Partnership - Description of Oil and Gas
Properties."

        Beginning in 1993, the Partnership's oil production volumes have
declined from peak levels reached in 1992. Gas production declined in 1993.
These reductions are due to the natural decline occurring in the Umbrella Point
Field, the Partnership's most significant asset. Production volumes are expected
to decline further in subsequent periods due to ongoing depletion of the
Partnership's wells.

        The 1991-1 Partnership has paid cumulatively $1,200 in cash
distributions per 1991-1 Unit to date. Since inception through June 30, 1995,
the 1991-1 Partnership has produced and sold approximately 81,261 Mcf of natural
gas and 16,477 Bbl of oil.

   
        The total amount of reserves encountered by and economically produced
from the wells acquired or drilled was substantially less than anticipated. In
addition, recent fluctuations in gas prices has impacted the 1991-1 Partnership.
Prices received for the sale of natural gas from the Umbrella Point Field, the
most significant Partnership property, ranged from $1.84 to $2.77 per Mcf during
1993, compared to $1.47 to $2.42 per Mcf during 1994. During the first seven
months of 1995, prices received for the sale of natural gas from the Umbrella
Point Field has continued to decline to a range of $1.40 to $1.75 per Mcf.
During these periods of declining natural gas prices, the 1991-1 Partnership's
cash flow was reduced while operating costs and third party costs did not
decline. Also as a result of lower natural gas prices, the amount of the 1991-1
Partnership's reserves that can be produced economically is reduced
substantially.
    

   
        In addition, many of the Investors in the 1991-1 Partnership have
expressed concern regarding the historical performance and continued operation
of the 1991-1 Partnership and its properties. See "The Exchange Offer and
Proposal--Litigation and Related Matters." In response to these concerns, the
Managing General Partner analyzed and evaluated the 1991-1 Partnership's
original objectives, current status and future prospects. The Managing General
Partner retained an independent petroleum engineer to prepare an updated
estimate of the remaining reserves of the 1991-1 Partnership properties and the
value of such reserves. In addition, the Managing General Partner made available
to third parties the 1991-1 Partnership well, production, reserve and property
information for the purpose of soliciting third party bids for the purchase of
the 1991-1 Partnership's assets. See "Recommendation of the Managing General
Partner--Managing General Partner's Determination that Exchange Offer is Fair"
for a discussion of the third party bids received by the Managing General
Partner.
    

                                       48
<PAGE>   62

        As the Private Placement Memorandum used to sell the 1991-1 Units
explained, oil and gas exploration and production have many risks, including the
risk that exploring for and producing natural gas and oil is highly speculative.
The search for oil and gas can result in unprofitable efforts not only from the
drilling of dry holes but from wells which, although initially productive, do
not produce oil and gas in sufficient amounts to return a profit on the costs
expended. In addition, there is a risk that oil and gas prices could decline and
the quantities of oil and gas discovered might not be sufficient to return the
initial investment. Based on the geological and geophysical information
available prior to the drilling and acquisition of the 1991-1 Partnership's
properties, the Managing General Partner believed that the 1991-1 Partnership's
wells would be able to provide economic benefit. However, based on the current
evaluation of the 1991-1 Partnership reserves and future prospects, the Managing
General Partner believes the most logical economic course is to exchange the
remaining assets as soon as possible, pursuant to the terms of the Exchange
Offer.

GOLDKING OFFER
   
        In 1994, the Managing General Partner of each of the Partnerships
determined that, with other working interest owners in the Umbrella Point Field,
a purchaser for the property should be solicited. In May 1994, a regional
investment bank which specializes in the energy industry was retained by the
working interest owners on an exclusive basis to solicit purchasers of the
Umbrella Point Field. A data package related to the property was assembled and
delivered to approximately 100 potential purchasers. Interested parties then
scheduled meetings to review detailed information regarding the Umbrella Point
Field in an established data room. Goldking was among the potential purchasers
who received such a data package.
    
   
        In June 1995, Benton received an offer from Goldking to purchase all of
the right, title and interest owned by each of the Partnerships and Benton in
the Umbrella Point Field. Goldking made a similar offer to all other working
interest owners in the Umbrella Point Field. Goldking's intent is to own 100% of
the working interests in the Field. To obtain financing for the purchase of the
working interests, Goldking was required to acquire not less than a 75% working
interest in the Field. In order to preserve the offer for the Partnerships,
Benton sold its corporate interest in the Umbrella Point Field (11.77% working
interest) for $756,872. Benton entered into agreements, on behalf of each of the
Partnerships, with Goldking for the sale of the Partnerships' interests in the
Umbrella Point Field, subject to approval of the Partnerships. In consideration
of this sale, the 1989-1 Partnership, the 1990-1 Partnership and the 1991-1
Partnership would receive anticipated net proceeds determined as of June 30,
1995 in the aggregate of $323,296, $930,296 and $185,282, respectively, if the
sale were consummated, subject to adjustments for revenues, expenses and capital
expenditures after that date. The agreements with Goldking are not contingent
upon each of the Partnerships approving the transaction.
    
   
        In addition to the Goldking offer, Benton received an offer to purchase
the working interests owned by each of the Partnerships and Benton in the
Umbrella Point Field from Hunter Resources, Inc. ("Hunter") in October 1994.
Pursuant to the terms of that offer, Hunter would have paid a total of
$8,000,000 in cash and $1,000,000 in the form of a promissory note, compared to
Goldking's offer of $7,650,000 in cash. Both offers were for the working
interests in the Umbrella Point Field owned by each of the Partnerships and the
11.77% working interest owned by Benton.

        Benton compared the Hunter offer, the Goldking offer and the estimated
value of the Umbrella Point Field proved reserves at December 31, 1994 (see
table below). In the case of all three Partnerships, the Hunter offer and the
Goldking offer were in excess of the value of the proved reserves of the
Umbrella Point Field. Hunter was unable to secure financing for the transaction
and subsequently withdrew its offer. Due to Hunter's inability to secure
financing for the purchase and the extent to which 
    
                                       49
<PAGE>   63

   
such offer exceeded the value of the Partnerships' proved reserves, Benton
concluded that Hunter's offer was in excess of the market value of the Umbrella
Point Field. When analyzing and considering the Goldking offer, Benton concluded
that the purchase price offered by Goldking was in excess of the value of the
Partnerships' proved reserves and, although less than the Hunter offer,
represented a favorable market value for the property.
    

   
<TABLE>
<CAPTION>
                                                                       UMBRELLA
                                                                         POINT
                                                                         FIELD
                           HUNTER OFFER(1)        GOLDKING              PROVED
PARTNERSHIP                (CASH & NOTES)         OFFER(1)            RESERVES(2)
- -----------                ---------------       ----------           -----------
<S>                         <C>                  <C>                  <C>       
   1989-1                   $  443,602           $  377,062           $  325,540
   1990-1                    1,277,264            1,085,674              937,429
   1991-1                      254,228              216,093              186,589
</TABLE>
    

- ----------
   

(1)  Prior to any adjustments for revenues and expenses subsequent to the
     effective date of sale, which in the case of Goldking is January 1, 1995.
     These adjustments, through June 30, 1995, are the reason for the
     differences in Goldking proceeds listed in this table as compared to other
     places in the document. The adjustments were omitted from this table for
     comparative purposes.
    

   
(2)  Value of estimated future net cash flows from Proved Reserves of the
     Umbrella Point Field, as of December 31, 1994, as reflected in the reserve
     report for the Partnership as of that date.
    

                                       50
<PAGE>   64

                         THE EXCHANGE OFFER AND PROPOSAL

DESCRIPTION OF THE EXCHANGE OFFER

   
        General. Benton is offering to exchange Common Stock and Warrants for
Partnership Units in the 1989-1 Partnership, the 1990-1 Partnership and the
1991-1 Partnership (the "Exchange"). Investors who tender their Partnership
Units will receive the number of shares of Common Stock and Warrants set forth
below for the respective Partnership Units. In connection with the Exchange
Offer, Benton is submitting Proposals to Investors in each of the Partnerships
to amend the respective Partnership Agreements to provide for the transfer of
all of the assets and liabilities of the Partnerships to Benton as of the
December 31, 1994 Effective Date in exchange for Common Stock and Warrants in
the amounts set forth below and the pro rata distribution of such consideration
in liquidation of the Partnership.
    

   
        1989-1 Partnership. If the Exchange Offer is consummated, each holder of
a 1989-1 Unit who tenders his Units in connection with the Exchange Offer will
receive (i) 107 shares of Common Stock, and (ii) Warrants to purchase 35 shares
of Common Stock with an exercise price of $11.00 per share. Fractional shares of
Common Stock will not be issued in connection with the Exchange Offer or
liquidation of the 1989-1 Partnership. A Partner in the 1989-1 Partnership
otherwise entitled to a fractional share of Common Stock will be paid in cash in
lieu of such fractional shares. Warrants to be issued will be rounded to the
nearest whole number of Warrants and no fractional interests will be issued.
    

   
        1990-1 Partnership. If the Exchange Offer is consummated, each holder of
a 1990-1 Unit who tenders his Units in connection with the Exchange Offer will
receive (i) 81 shares of Common Stock and (ii) Warrants to purchase 334 shares
of Common Stock with an exercise price of $11.00 per share. Fractional shares of
Common Stock will not be issued in connection with the Exchange Offer or
liquidation of the 1990-1 Partnership. A Partner in the 1990-1 Partnership
otherwise entitled to a fractional share of Common Stock will be paid in cash in
lieu of such fractional shares. Warrants to be issued will be rounded to the
nearest whole number of Warrants and no fractional interests will be issued.
    

   
        1991-1 Partnership. If the Exchange Offer is consummated, each holder of
a 1991-1 Unit who tenders his Units in connection with the Exchange Offer will
receive (i) 95 shares of Common Stock and (ii) Warrants to purchase 385 shares
of Common Stock with an exercise price of $11.00 per share. Fractional shares of
Common Stock will not be issued in connection with the Exchange Offer or
liquidation of the 1991-1 Partnership. A Partner in the 1991-1 Partnership
otherwise entitled to a fractional share of Common Stock will be paid in cash in
lieu of such fractional shares. Warrants to be issued will be rounded to the
nearest whole number of Warrants and no fractional interests will be issued.
    

THE PROPOSAL

        Description of Proposal. Benton is submitting to the Investors in each
of the Partnerships the proposal to adopt an amendment to each of the
Partnerships' Partnership Agreements annexed as Exhibit C to this Prospectus.
The respective amendments, if adopted by each of the Partnerships in accordance
with the amendment procedures in the Partnership Agreement will provide for the
following steps:

    -   The transfer to Benton in exchange for the Common Stock and Warrants set
        forth below, of all of the assets of the Partnership and the assumption
        by Benton of all liabilities of the Partnership effective as of the
        Effective Date.

                                       51
<PAGE>   65

    -   The dissolution of each of the Partnerships and the distribution to the
        Investors of the Common Stock and Warrants allocable to their interests
        in liquidation promptly following the Closing Date.

        Each Investor who tenders his Partnership Units pursuant to the Exchange
Offer will by that tender, consent to the proposal for that Partnership. If a
Partnership adopts the proposal by the consent of 75% of the Partnership Units
for the respective Partnership, all Investors in that Partnership, whether or
not they tendered their Units in the Exchange Offer, will receive the same
amount of Common Stock and Warrants as they would have received had they
tendered their Partnership Units. Consummation of the Exchange Offer for a
partnership is conditioned upon approval by that partnership of the proposal.
Approval of the proposal and adoption of the Exchange Offer is not conditioned
upon approval or acceptance by any other partnership. Investors who do not
return a completed Letter of Transmittal will not receive Benton Common Stock or
Warrants until Benton has distributed immediately after the closing date and
Investors have return an executed Transfer Application issuable to them in the
exchange, which may result in a delay in receiving the Common Stock and Warrants
if the transfer application is not properly returned.

        Timing of Common Stock Issuance. Assuming that the proposal is adopted
and the Exchange Offer is consummated, Benton will have the benefit of each of
the Partnership's assets and associated cash flows commencing on the effective
date of December 31, 1994. The Common Stock and Warrants issued in the exchange
will be freely transferable immediately following issuance.

        On the Closing Date, Benton will cause certificates representing the
Common Stock and the Warrants issuable in the Exchange to be registered in the
name of the holders who have accepted the Exchange Offer. Benton will also cause
a certificate representing the shares of Common Stock and Warrants that will be
issued to participants upon liquidation of each of the Partnerships to be issued
in the name of the Partnership, pending dissolution, liquidation and winding-up
of the Partnerships. Immediately thereafter, Benton will cause the shares of
Common Stock and Warrants issued in the name of the Partnership to be
transferred into certificates representing Common Stock and Warrants, registered
in the names of the individual participants remaining in the Partnerships
following liquidation.

        Conditions. Benton may, in it sole discretion, at any time on or prior
to the closing date, refuse to consummate, abandon or terminate the exchange
offer and withdraw the proposal if after the date of this prospectus, in the
sole judgment of Benton, a material change shall have occurred or been
threatened (or any development shall have occurred or been threatened involving
a prospective material change) affecting (or likely to affect) the business or
properties of Benton or the partnerships or if Benton shall have become aware of
any facts or circumstances that have or may have material significance with
respect to Benton's operations. If any event shall occur or any matter shall
have been brought to the attention of Benton, that, in the sole judgment of
Benton materially affects the partnerships, whether adversely or otherwise, or
the exchange offer for interest in the partnerships, Benton may refuse to accept
tenders of interest in the partnerships, or may modify or amend the Exchange
Offer to take the event or matter into account.

        The absence of the material change affecting Benton or the Partnerships
is the only material condition to the exchange offer. If that condition has not
been fulfilled or the exchange offer is withdrawn by Benton, each letter of
transmittal tendering an interest or consenting to the proposal will be void and
no Common Stock or Warrants will be issued in exchange for the interests in the
respective partnership.

                                       52
<PAGE>   66

DISSENTERS' RIGHTS

        Investors residing in states other than California will not be afforded
any dissenters' or appraisal rights. Under the rules adopted by the National
Association of Securities Dealers, Inc., ("NASD"), Investors in roll-up
transactions such as the Exchange Offer are entitled to certain dissenters'
rights unless the sponsor adopts a 75% approval requirement for the transaction
or other procedures designed to protect the rights of Investors. Although
adoption of the Proposals by each of the Partnerships would require the consent
under the Partnership Agreements of the holders of only a majority of the
Partnership Units, the Managing General Partner has adopted a 75% approval
procedure instead of providing dissenters' rights.

   
        Investors residing in California will be afforded limited dissenters'
rights in accordance with the requirements for roll-up transactions under
Section 25014.7 of the California Code. See Exhibit E to this Prospectus. By 
voting against the Proposal, Investors in the State of California will be
deemed to exercise their dissenters' rights and will receive the number of
shares of Common Stock and Warrants equal to the Exchange Value of their
interests divided by the closing price of the Common Stock on the NASDAQ-NMS
during the twenty days immediately after the Closing Date. If that average
price is lower than the Exchange Price, dissenting California Investors will
receive more shares of Common Stock and Warrants than they would otherwise
receive in the Exchange Offer. IF, HOWEVER, THE AVERAGE PRICE IS HIGHER THAN
THE EXCHANGE PRICE, A DISSENTING INVESTOR WOULD RECEIVE FEWER SHARES OF COMMON
STOCK AND WARRANTS. California Investors hold a substantial portion of the
interests in the 1989-1 Partnership, the 1990-1 Partnership and the 1991-1
Partnership and the impact of the exercise of dissenters' rights could
materially increase or decrease the number of shares of Common Stock issued by
Benton in connection with the Exchange Offer.     

DISTRIBUTION OF COMMON STOCK AND WARRANTS

        Each Investor who returns a completed Letter of Transmittal, even if he
withholds consent to the Proposal, will thereby have provided to Benton the
necessary information to issue the Common Stock and Warrants provided the
Exchange Offer is consummated. Assuming that the Proposals are adopted by the
Partnerships and the Exchange Offer is consummated, Investors who have returned
a completed Letter of Transmittal will receive the Common Stock and Warrants
issuable to them in the Exchange promptly after the Closing Date.

        An Investor who does not return a completed Letter of Transmittal will
not be eligible to receive the Common Stock and Warrants after the Closing Date.
Instead, the Common Stock and Warrants, attributable to that Investor's
Partnership Units will be held of record by the respective Partnerships.
Immediately after the Closing Date, Benton will deliver a Transfer Notice to
each Investor who has not returned a Letter of Transmittal. The Transfer Notice
should be completed and returned to Benton promptly. Upon return of the executed
Transfer Notice, Benton will have the Common Stock and Warrants transferred and
delivered to the Investor.

ELECTION TO RECEIVE CASH IN LIEU OF COMMON STOCK

   
        Holders of Units in the Partnerships who elect to accept the Exchange
Offer may elect to receive cash in lieu of shares of Common Stock to be issued,
BUT CASH WILL BE DISTRIBUTED TO HOLDERS MAKING SUCH ELECTION ONLY IF THE SALE OF
THE UMBRELLA POINT FIELD TO GOLDKING, AS DESCRIBED HEREIN, IS ACTUALLY
CONSUMMATED. If the sale of the Umbrella Point Field working interests to
Goldking is consummated, a holder who elects to receive cash in lieu of Common
Stock will receive $1,185 for each 
    

                                       53
<PAGE>   67

   
1989-1 Unit, $891 for each 1990-1 Unit and $1,055 for each 1991-1 Unit, with
Warrants in the amounts described herein. The amount of cash to be paid per
Partnership Unit was computed based upon the estimated cash proceeds per Unit to
be received pursuant to the Goldking purchase offer, plus pro rata distribution
of working capital of the Partnership. A holder of Units in the Partnerships who
accepts the Exchange Offer and elects to receive cash in lieu of shares of
Common Stock, assuming that the Goldking transaction is consummated, will
receive cash and Warrants with a total value of $1,312, $2,107 and $2,456 for
each 1989-1 Unit, 1990-1 Unit and 1991-1 Unit, respectively. There can be no
assurance from Benton that the sale of the Umbrella Point Field to Goldking will
be consummated, and therefore, an Investor should make a decision to accept the
Exchange Offer based solely upon a decision to receive Common Stock and Warrants
in the amounts set forth herein.
    

INTERESTS OF CERTAIN PERSONS IN THE EXCHANGE AND PROPOSALS

        In considering the recommendation of the Managing General Partner, the
Investors should be aware that the Managing General Partner has interests in the
Exchange that are in addition to the interests of the Partnerships and the
Investors generally. Benton is the Managing General Partner of each of the
Partnerships and its determination of the Exchange Values involves an inherent
conflict of interest. As Managing General Partner, Benton owes fiduciary duties
to the Investors in the Partnerships. In addition, it owes a duty to its
stockholders. While Benton believes that it has fulfilled these obligations in
its determination of the Exchange Values, which is supported, in part, by a
reserve report audited by an independent petroleum engineer, no degree of
objectivity or professional competence can eliminate the inherent conflict of
interest.

RESALE OF BENTON COMMON STOCK

        The issuance of the Benton Common Stock to be received by the Investors
who tender their Partnership Units and the shares to be received by Investors in
liquidation of the Partnerships, as well as the issuance of the Common Stock
upon exercise of the Warrants, has been registered under the Securities Act.
Such shares may be traded freely and without restriction by those Investors of
the Partnerships not deemed to be "affiliates" of the Partnerships, as that term
is defined in the rules under the Securities Act. "Affiliates" are generally
defined as persons who control, are controlled by or are under common control
with the Partnership at the time of the Exchange. Accordingly, "affiliates"
generally will include the Managing General Partner and any Investor who owns in
excess of 10% of the Partnership interests. Benton Common Stock received by
those Investors who are deemed to be "affiliates" of a Partnership may be resold
without registration as provided by Rules 144 and 145, or as otherwise
permitted, under the Securities Act. This Prospectus does not cover any resales
of Benton Common Stock received by affiliates of the Partnerships or by certain
family members or related interests. Any Investor who becomes an affiliate of
Benton will be subject to similar restrictions under Rule 144.

FRACTIONAL SHARES

        No fractional shares of Benton Common Stock will be issued. Fractional
share interests which would otherwise be issuable shall entitle the holder
thereof to receive, in lieu of such fractional interest, an amount of cash equal
to the product of such fraction multiplied by the closing price of the Benton
Common Stock on the NASDAQ-NMS on the Closing Date. Warrants to be issued will
be rounded to the nearest whole number of Warrants and no fractional interests
will be issued.

                                       54
<PAGE>   68

STOCK EXCHANGE LISTING

        All of the currently issued and outstanding shares of Common Stock of
Benton are admitted for trading and quoted on the NASDAQ-NMS, and application
has been made to the NASDAQ-NMS for admission for trading of the shares of
Common Stock to be issued in connection with the Exchange Offer and the shares
of Common Stock issuable upon exercise of the Warrants. There is currently no
trading market for the Warrants, and Benton does not expect a trading market to
develop.

ACCOUNTING TREATMENT

        The Exchange will be accounted for as a purchase by Benton. Accordingly,
the purchase price will be allocated to assets and liabilities based on their
estimated fair values as of the date of acquisition.

CLOSING DATE

        The Exchange Offer is expected to be consummated on the Closing Date,
which will be no more than five days following the Expiration Date. Benton may
withdraw the Exchange Offer at any time prior to the Expiration Date under
certain circumstances, including the existence of any state or federal statute,
rule, regulation or order, or entry of any judicial or administrative order that
would prohibit the transactions contemplated by the Exchange Offer and the
Proposals.

        1989-1 Partnership. The Exchange Offer to the 1989-1 Partnership is
conditioned upon consent of 75% of the 1989-1 Units to the 1989-1 Proposal and
the absence of any material adverse development affecting the 1989-1
Partnership, as determined by Benton in its sole discretion. On the Closing
Date, subject to satisfaction of these conditions, Benton intends to accept all
1989-1 Units validly tendered and not withdrawn pursuant to the Exchange Offer.

        1990-1 Partnership. The Exchange Offer to the 1990-1 Partnership is
conditioned upon consent of 75% of the 1990-1 Units to the 1990-1 Proposal and
the absence of any material adverse development affecting the 1990-1
Partnership, as determined by Benton in its sole discretion. On the Closing
Date, subject to satisfaction of these conditions, Benton intends to accept all
1990-1 Units validly tendered and not withdrawn pursuant to the Exchange Offer.

        1991-1 Partnership. The Exchange Offer to the 1991-1 Partnership is
conditioned upon consent of 75% of the 1991-1 Units to the 1991-1 Proposal and
the absence of any material adverse development affecting the 1991-1
Partnership, as determined by Benton in its sole discretion. On the Closing
Date, subject to satisfaction of these conditions, Benton intends to accept all
1991-1 Units validly tendered and not withdrawn pursuant to the Exchange Offer.

OPERATIONS AFTER THE EXCHANGE

        Benton is an independent oil and gas company engaged in the acquisition
of producing properties and exploration, development and production of oil and
gas, primarily in the eastern region of Venezuela, the Gulf Coast of Louisiana
and the West Siberia region of Russia. Upon consummation of the Exchange, Benton
intends to sell the working interests in the Umbrella Point Field to Goldking on
the terms described herein. If, however, such sale is not consummated, Benton
will operate the acquired Partnership assets as it operates its oil and gas
properties, or may sell those assets to another third party.

                                       55
<PAGE>   69

EXPENSES; FEES

        All expenses incurred in connection with the Exchange Offer and the
Proposals and the transactions contemplated thereby will be paid by Benton.
Benton will pay the expenses incurred in connection with tender offer to the
Investors of the Partnerships and will pay all fees and expenses in connection
with this Prospectus, including fees and expenses payable in connection with the
Registration Statement of which this Prospectus is a part.

BENTON'S DIVIDEND POLICY

   
        Benton's policy is to retain its earnings to support the growth of
Benton's business. Accordingly, the Board of Directors of Benton has never
declared cash dividends on its Common Stock and does not plan to do so in the
foreseeable future. Furthermore, the terms of its credit agreements prohibit the
payment of cash dividends on Benton's Common Stock.
    

LITIGATION AND RELATED MATTERS

   
        On June 13, 1994, certain partners in the Partnerships and certain other
Investors in oil and gas limited partnerships sponsored by Benton, including the
Partnerships that are the subject of this Exchange Offer, filed suit against
Benton in the Ventura Superior Court. The allegations in the complaint related
to Benton's operation of the Partnerships and original sale of the Partnership
Units. In an effort to resolve the concerns raised by these partners, Benton
agreed to submit the matter to arbitration, conditioned upon the execution of a
mutually satisfactory arbitration agreement. After discussions between Benton
and the agent for the partners failed to produce a satisfactory arbitration
agreement, Benton filed an answer to the complaint. The parties have now
voluntarily dismissed the action and submitted the issues and claims to
arbitration. Specifically, the allegations in the complaint which are subject to
the arbitration relate to Benton's operation of the partnerships and in the sale
of the partnership units, including allegations against Benton for breach of
contract, fraudulent inducement to invest in the partnerships, negligent
misrepresentation in the sale of the partnership units, breach of fiduciary
duties, and conversion of partnership funds to Benton's own benefit. The
plaintiffs seek actual and punitive damages in an unspecified amount, and
rescission of the sale of the partnership units. Benton filed an answer to the
complaint which denied the allegations and believes that the allegations made by
the partners in the arbitration are without merit and intends to vigorously
defend this action.
    

   
        Acceptance of the Exchange Offer and approval of the Proposals by the
Investors of the Partnerships will result in the dissolution of any Partnership
obtaining such approval and the Common Stock and Warrants received in the
Exchange will be distributed, in liquidation, to the Investors of such
Partnership who did not tender their Partnership Units. YOUR CONSENT TO THE
PROPOSAL MAY AFFECT THE AMOUNT OF DAMAGES, IF ANY, YOU COULD RECEIVE IN THE
ARBITRATION DISCUSSED ABOVE AND EACH INVESTOR IS ENCOURAGED TO CONSULT HIS OR
HER LEGAL ADVISOR TO DETERMINE THE EFFECT OF ANY CONSENT ON THE PROPOSAL. In the
arbitration proceeding, the arbitrator will determine the extent of liability
against Benton, if any, related to the allegations submitted. If any liability
is found to exist, the arbitrator will determine the amount of any damages,
actual and/or punitive. The arbitrator may consider all distributions made to
the partners from the partnerships in determining the extent of damages, if any.
In such analysis, the arbitrator may consider the consideration received by
Investors in connection with the Exchange Offer, which could significantly
reduce any damage award against Benton. However, there can be no assurance that
an arbitrator will consider such factors in his or her determination of damages
if the allegations are found to be true and damages are to 
    

                                       56
<PAGE>   70

   
be awarded. Benton expects to present this Exchange Offer to the arbitrator to
be considered in determining the extent of damages, if any.
    

                                       57
<PAGE>   71

                      METHOD OF DETERMINING EXCHANGE VALUES

GENERAL

   
        The Exchange Values have been assigned to the Partnership Units to
determine the number of shares of Common Stock and Warrants to be offered for
each Partnership Unit. The Exchange Values were determined by Benton and are not
the result of negotiations with independent representatives of the Partnerships.
Accordingly, the Exchange Values may not reflect the value of the Partnership
Units or the value of the Partnership properties if all the assets were to be
sold to an unaffiliated third party in an arm's length transaction. Benton did
seek third party bids for the sale of the Partnerships' assets and received an
offer to purchase the Partnerships' working interests in the Umbrella Point
Field from Goldking. The Exchange Values are based in part on this third party
offer from Goldking. Management of Benton has substantial experience in
evaluating and operating oil and gas properties in the Partnerships' production
areas and believes on the basis of that experience that the methodology employed
in determining the Exchange Values is fair to Investors and considered in the
oil and gas industry as being favorable to sellers of producing properties.
    

   
        In determining the Exchange Value, Benton considered the total
distributions paid to date to participants in the respective Partnerships. For
each of the Partnerships, Benton assigned a Total Exchange Value to the
Partnership which, based upon certain assumptions described below, and in
addition to the distributions paid to date, would provide Investors with
consideration valued at 100% of their initial contribution to the Partnership.
The estimated cash proceeds from the sale of the working interests in the
Umbrella Point Field to Goldking and the value of other tangible assets of the
Partnership are attributable to shares of Benton Common Stock, or cash if the
Investor makes the cash election described herein. The remaining dollar value,
if any, is referred to herein as General Intangibles. Pursuant to the Exchange
Offer, value attributed to General Intangibles will be distributed to Investors
in the form of Warrants.
    

   
        The number of shares of Common Stock and Warrants to be issued pursuant
to the Exchange Offer has been determined relative to a Total Exchange Value
assigned to the 1989-1 Partnership Units, the 1990-1 Partnership Units and the
1991-1 Partnership Units aggregating $370,098, $2,990,728, and $692,349,
respectively. The number of shares of Common Stock offered in exchange for
Partnership Units has been determined by dividing the Exchange Value of the
tangible assets of the Partnership by a Common Stock price of $11.00, subject to
rounding adjustments. The Common Stock price is based upon the average closing
price of the Common Stock on NASDAQ-National Market for the 20 trading days
immediately preceding September 12, 1995 and will not reflect any subsequent
increase or decrease in the market price for the Common Stock after that date,
except to the extent required by dissenters' rights for California residents.
The number of Warrants to be assigned to each Partnership Unit was determined by
dividing the estimated value of the General Intangibles of the Partnership by
the estimated present value per Warrant. Benton has used the Black-Scholes
option pricing model to calculate the present value of the Warrants, which
yielded a value of $3.64 per Warrant. The Warrants are exercisable at a price of
$11.00 per share and will expire three years from the date of issuance.
    
   

        The most significant assets considered in determining the Exchange
Values were the anticipated cash proceeds from the sale of Umbrella Point Field
and the Proved Reserves of the Partnerships. The Exchange Values reflect these
oil and gas assets and all other assets and liabilities of the Partnerships.
These components reflect (i) the estimated cash proceeds from the sale of
Umbrella Point Field to Goldking, (ii) the estimated present value of future net
cash flows from Proved Reserves of the Partnership as of December 31, 1994,
discounted 10% per year and calculated without escalation of 
    

                                       58
<PAGE>   72

prices and costs prepared by Benton and audited by Huddleston, (iii) the net
book value of current assets and liabilities of the Partnership as of June 30,
1995, (iv) the tax-basis balances of equipment as of December 31, 1994, and (v)
the General Intangibles of the Partnership. Based on management's experience in
evaluating reserve acquisition opportunities and transactions in the
Partnerships' production areas, Benton believes that the components of the
Exchange Values reflect all appropriate valuation criteria for the Partnerships
in accordance with industry practice. Each component of the Exchange Value,
estimated on the basis of interim data, is presented for each of the
Partnerships in the tables and discussions below.

   
        Huddleston is a firm of petroleum and geological engineers, in the
business of preparing and auditing oil and gas reserve information. Huddleston
has been engaged in this business since 1965, and the personnel performing the
audits of the Partnerships' reserves are certified Petroleum Engineers.
Huddleston has performed the annual audit of the oil and gas reserve information
of Benton since 1992, and is compensated by Benton for such audit in the amount
of approximately $7,100 per year. In addition, Huddleston has provided an annual
audit of the reserve information for each of the Partnerships for 1994 for
approximately $3,145, $10,759 and $2,648 for the 1989-1 Partnership, the 1990-1
Partnership and the 1991-1 Partnership, respectively. Additionally, Huddleston
has assisted the Company in the preparation of reports which estimate the future
recoverable reserves for Benton's Russian project. These reports were part of a
study to obtain long-term financing for the Russian project. For these services,
the Company paid Huddleston an aggregate of $58,770. In connection with the
annual audit by Huddleston of the Benton reserve information, Huddleston audited
the reserve information related to Benton's interest in the Umbrella Point
Field. Because of Huddleston's qualifications and familiarity with the fields in
which the Partnerships own a working interest, the Managing General Partner
retained Huddleston to audit the annual reserve information for each of the
Partnerships. The compensation paid to Huddleston to audit the annual reserve
information for each of the Partnerships, used by Benton in preparation of the
Exchange Offer, is not contingent upon approval of the Exchange Offer and
Proposals.
    

1989-1 PARTNERSHIP EXCHANGE VALUE COMPONENTS

        General. The following table sets forth each of the Exchange Value
components, estimated on an interim basis.

                            EXCHANGE VALUE COMPONENTS

   
<TABLE>
<S>                                                                                         <C>     
        Estimated Cash Proceeds--Umbrella Point Field.....................................  $323,296
        Present Value of Proved Reserves of other properties (SEC PV 10)..................         0
        Cash..............................................................................     5,717
        Intercompany receivable--Benton Oil and Gas Company...............................       621
        Value of equipment................................................................     4,563
        General Intangibles...............................................................    35,901
                                                                                            --------
        Exchange Value....................................................................  $370,098
                                                                                            ========
</TABLE>
    

   
        Other Assets and Liabilities. The tax-basis balances of the 1989-1
Partnership's equipment, excluding Umbrella Point field equipment, aggregated
$4,563 at December 31, 1994, and the net book value of its current assets and
liabilities as of June 30, 1995 reflect a balance of $6,338, excluding property
held for sale. The equipment value and net current assets are based upon the
1989-1 Partnership's 1994 year-end tax accounting records and June 30, 1995
unaudited financial statements, 
    

                                       59
<PAGE>   73

respectively, maintained in accordance with the applicable provisions of the
1989-1 Partnership Agreement.

        Benton believes that valuing the 1989-1 Partnership's equipment
(comprised of oil and gas production and transportation facilities) at tax-basis
balances is favorable to the sellers of the producing properties since many
purchasers in transactions evaluated by Benton, as part of its Benton's
involvement in the production area, allocate nominal value to well equipment on
the theory that its salvage value at the end of the commercial lives of acquired
wells will approximate the cost of plugging and abandoning the wells. Benton
believes that the original cost of the equipment less the deductions computed
through 1994 year end for tax purposes represents a reasonable approximation of
the fair market value of the equipment to Benton. Benton also believes that
valuing the current assets and liabilities of the 1989-1 Partnership (comprised
of cash and intercompany receivable) at their book value as of June 30, 1995 is
appropriate to reflect the fair market value of these items, which are expected
to be collected and paid to Benton, to the extent outstanding, in the stated
amounts reflected in the 1989-1 Partnership's unaudited balance sheet as of that
date.

   
        General Intangibles. In determining the value attributed to General
Intangibles, Benton evaluated the success to date of the 1989-1 Partnership,
total consideration paid to date to the participants and the value to Benton of
dissolving and liquidating the 1989-1 Partnership so that Benton can focus on
its current operations and reduce the administrative burdens associated with
operating the Partnership. Based upon Benton's evaluation of historical
administrative costs for the 1989-1 Partnership, Benton estimates that the
administrative costs for operating the Partnership will be approximately $35,000
per year. From inception through September 1995, the 1989-1 Partnership has made
cash distributions to participants aggregating $848,836, or $3,012 per 1989-1
Unit. In forming the 1989-1 Partnership, Benton sold an aggregate of $1,409,091
in 1989-1 Units. Benton acknowledges the concerns raised by the Investors in the
1989-1 Partnership with regard to operations of the Partnership, and the
disappointing returns on investment by the Investors. Because many of the
Investors are or were stockholders of Benton, Benton desires to maintain a good
relationship with these stockholders, many of whom have been strong supporters
of Benton from inception, and Benton desires to avoid future claims against it
by participants relating to the management of the Partnership. "See The Exchange
Offer and Proposal-Litigation and Related Matters." Assuming that the Investor
in the 1989-1 Partnership elects to hold his or her shares of Common Stock, and
the market price of Common Stock is at or above approximately $16.75 per share,
Benton believes that the Investors in the 1989-1 Partnership will have received
consideration in the form of cash distributions and Common Stock in excess of
the initial investment in the 1989-1 Partnership, without regard to any tax
benefits received by the participants. On October 2, 1995, the last sales
price of the Benton Common Stock on NASDAQ National Market was $11.13 per share.
The assumed market price of the Common Stock of $16.75 per share discussed above
represents a 34% increase in the market value of the Benton Common Stock. There
can be no assurance that the market price of the Benton Common Stock will
increase or that such price will be achieved.
    

1990-1 PARTNERSHIP EXCHANGE VALUE COMPONENTS

        General. The following table sets forth each of the Exchange Value
components, estimated on an interim basis.

                                       60
<PAGE>   74

                            EXCHANGE VALUE COMPONENTS
   

<TABLE>
<S>                                                                                              <C>     
        Estimated Cash Proceeds-Umbrella Point Field.........................................    $930,865
        Present value of Proved Reserves of other properties (SEC PV 10).....................     119,694
        Cash.................................................................................     145,455
        Intercompany receivable--Benton Oil and Gas Company..................................      56,281
        Value of equipment...................................................................      13,037
        General Intangibles..................................................................   1,725,396
                                                                                               ----------
        Exchange Value.......................................................................  $2,990,728
                                                                                               ==========
</TABLE>
    

        Proved Reserves. The calculation of the present value of the 1990-1
Partnership's Proved Reserves for the purpose of determining the Exchange Value
complies with the rules and regulations of the SEC relating to the calculation
of the present value of future net cash flows determined as of December 31, 1994
attributable to proved oil and gas reserves for disclosure and financial
reporting purposes. The regulations governing these reserves do not permit the
use of escalated prices and costs except in accordance with existing contractual
arrangements, and the resulting SEC PV 10 calculations may overestimate or
underestimate the actual future cash flows from the production and sale of oil
and gas and, consequently, the present value thereof.

        The gross quantities of Proved Reserves attributable to the 1990-1
Partnership's interest in its wells, together with the estimated present value
of those reserves, were estimated on an SEC PV 10 basis as of December 31, 1994
in a reserve report prepared by Benton and audited by Huddleston. A summary of
the report and a copy of the audit letter, setting forth the criteria and
assumptions used in evaluating the 1990-1 Partnership's Proved Reserves, are
included in Exhibit B.

        There are numerous uncertainties inherent in estimating quantities of
Proved Reserves. Huddleston audited the data and computations used by Benton's
petroleum engineer in their evaluation of the total Proved Reserves attributable
to all of the wells in which the 1990-1 Partnership had an interest as of
December 31, 1994. Estimates by other independent petroleum engineers could vary
from Benton's estimates and could result in higher or lower valuations.

        The estimates of the 1990-1 Partnership's future gross revenues
attributable to its estimated Proved Reserves as of December 31, 1994 were
calculated based on natural gas and crude oil prices in effect on that date.
Those prices had a weighted average of $1.63 per Mcf for natural gas and $15.94
per Bbl for oil.

        Future operating and development costs were based on the 1990-1
Partnership's operating and development costs as of December 31, 1994 and were
used without escalation. Future severance (production) and ad valorem (property)
taxes were calculated using rates prevailing at December 31, 1994. The estimated
future gross revenues, future operating and development costs and production
taxes were allocated to the 1990-1 Partnership in accordance with its interest
in oil and gas properties, taking into account applicable reversionary and
overriding royalty interests.

        The present values of the estimated net cash flows attributable to the
1990-1 Partnership's Proved Reserves of other properties were calculated by
discounting the future net cash flows to present value at the rate of 10% per
year, as prescribed by SEC regulations covering reserve reporting for financial
disclosure purposes. The discount factor is intended to reflect the timing of
future net cash flows. No further discount or risk adjustment was applied.
Present value, regardless of the discount rate 

                                       61
<PAGE>   75

   
used, is materially affected by assumptions as to timing of future production,
which may prove to have been inaccurate.
    

   
        Other Assets and Liabilities. The tax-basis balances of the 1990-1
Partnership's equipment, excluding Umbrella Point Field equipment, aggregated
$13,037 at December 31, 1994, and the net book value of its current assets and
liabilities as of June 30, 1995 reflect a balance of $201,736, excluding
property held for sale. The equipment value and net current assets are based
upon the 1990-1 Partnership's 1994 year-end tax accounting records and June 30,
1995 unaudited financial statements, respectively, maintained in accordance with
the applicable provisions of the 1990-1 Partnership Agreement.
    
   
        Benton believes that valuing the 1990-1 Partnership's equipment
(comprised of oil and gas production and transportation facilities) at tax-basis
balances is favorable to the sellers of the producing properties since many
purchasers in transactions evaluated by Benton, as part of Benton's involvement
in the production area, allocate nominal value to well equipment on the theory
that its salvage value at the end of the commercial lives of acquired wells will
approximate the cost of plugging and abandoning the wells. Benton believes that
the original cost of the equipment less the deductions computed through 1994
year end for tax purposes represents a reasonable approximation of the fair
market value of the equipment to Benton. Benton also believes that valuing the
current assets and liabilities of the 1990-1 Partnership (comprised of cash and
intercompany receivable) at their book value as of June 30, 1995 is appropriate
to reflect the fair market value of these items, which are expected to be
collected and paid to Benton, to the extent outstanding, in the stated amounts
reflected in the 1990-1 Partnership's unaudited balance sheet as of that date.
    
   
        General Intangibles. In determining the value attributed to General
Intangibles, Benton evaluated the success to date of the 1990-1 Partnership,
total consideration paid to date to the participants and the value to Benton of
dissolving and liquidating the 1990-1 Partnership so that Benton can focus on
its current operations and reduce the administrative burdens associated with
operating the Partnership. Based upon Benton's evaluation of historical
administrative costs for the 1990-1 Partnership, Benton estimates that the
administrative costs for operating the Partnership will be approximately $80,000
per year. From inception through September 1995, the 1990-1 Partnership has made
cash distributions to participants aggregating $2,452,364, or $1,728 per 1990-1
Unit. In forming the 1990-1 Partnership, Benton sold an aggregate of $7,095,960
of 1990-1 Units. Benton acknowledges the concerns raised by the Investors in the
1990-1 Partnership with regard to operations of the Partnership, the lack of
success and thus the disappointing returns on investment by the Investors.
Because many of the Investors are or were stockholders of Benton, Benton desires
to maintain a good relationship with these stockholders, many of whom have been
strong supporters of Benton from inception, and Benton desires to avoid future
claims against it by participants relating to the management of the Partnership.
See "The Exchange Offer and Proposal--Litigation and Related Matters." Assuming
that the Investor in the 1990-1 Partnership elects to hold his or her shares of
Common Stock and exercises his or her Warrants at the end of the three-year
term, and the market price of the Common Stock is at or above approximately
$16.75 per share, Benton believes that the Investors in the 1990-1 Partnership,
will have received consideration in the form of cash distributions, Common Stock
and Warrants in excess of the initial investment in the 1990-1 Partnership,
without regard to any tax benefits received by the participants. On October 2,
1995, the last sales price of the Benton Common Stock on NASDAQ National Market 
was $11.13 per share. The assumed market price of the Common Stock of $16.75 
per share discussed above represents a 34% increase in the market value of the 
Benton Common Stock during the three year term of the Warrants. There can be no 
assurance that the market price of the Benton Common Stock will increase or 
that such price will be achieved. The value of the General Intangibles of the 
Partnership is not subject to valuation by third parties since the General 
Intangibles do not 
    

                                       62
<PAGE>   76

represent actual assets of the Partnership. Benton believes that the
participants in the Partnership will not receive any value for the General
Intangibles in any alternative to the Exchange.

        Subsequent Adjustments. The Exchange Values will not be adjusted to
reflect changes after December 31, 1994 in the present value of the estimated
future net cash flows attributable to the 1990-1 Partnership's Proved Reserves.
No adjustments will be made to the Exchange Values on account of changes in
demand for or costs or prices of oil and gas that differ from the assumptions
employed or other market related events after December 31, 1994, although those
could affect the value of the 1990-1 Units.

1991-1 PARTNERSHIP EXCHANGE VALUE COMPONENTS

        General. The following table sets forth each of the Exchange Value
components, estimated on an interim basis.

                            EXCHANGE VALUE COMPONENTS

   
<TABLE>
<S>                                                                                                <C>     
         Estimated cash proceeds--Umbrella Point Field..........................................   $185,282
         Present Value of Proved Reserves of other properties (SEC PV 10).......................     23,856
         Cash...................................................................................     82,547
         Intercompany Receivable--Benton Oil and Gas Company....................................      3,169
         Value of Equipment.....................................................................      2,555
         General Intangibles....................................................................    394,940
                                                                                                   --------
         Exchange Value.........................................................................   $692,349
                                                                                                   ========
</TABLE>
    

        Proved Reserves. The calculation of the present value of the 1991-1
Partnership's Proved Reserves of other properties for the purpose of determining
the Exchange Value complies with the rules and regulations of the SEC relating
to the calculation of the present value of future net cash flows determined as
of December 31, 1994 attributable to proved oil and gas reserves for disclosure
and financial reporting purposes. The regulations governing these reserves do
not permit the use of escalated prices and costs except in accordance with
existing contractual arrangements, and the resulting SEC PV 10 calculations may
overestimate or underestimate the actual future cash flows from the production
and sale of oil and gas and, consequently, the present value thereof.

        The gross quantities of Proved Reserves attributable to the 1991-1
Partnership's interest in its wells, together with the estimated present value
of those reserves, were estimated on an SEC PV 10 basis as of December 31, 1994
in a reserve report prepared by Benton and audited by Huddleston. A summary of
the report and a copy of the audit letter, setting forth the criteria and
assumptions used in evaluating the 1991-1 Partnership's Proved Reserves, are
included in Exhibit B.

        There are numerous uncertainties inherent in estimating quantities of
Proved Reserves. Huddleston audited the data and computations used by Benton's
petroleum engineer in their evaluation of the total Proved Reserves attributable
to all of the wells in which the 1991-1 Partnership had an interest as of
December 31, 1994. Estimates by other independent petroleum engineers could vary
from Benton's estimates and could result in higher or lower valuations.

        The estimates of the 1991-1 Partnership's future gross revenues
attributable to its estimated Proved Reserves as of December 31, 1994 were
calculated based on natural gas and crude oil prices in 

                                       63
<PAGE>   77

effect on that date. Those prices had a weighted average of $1.63 per Mcf for
natural gas and $15.94 per Bbl for oil.

        Future operating and development costs were based on the 1991-1
Partnership's operating and development costs as of December 31, 1994 and were
used without escalation. Future severance (production) and ad valorem (property)
taxes were calculated using rates prevailing at December 31, 1994. The estimated
future gross revenues, future operating and development costs and production
taxes were allocated to the 1991 - 1 Partnership in accordance with its interest
in oil and gas properties, taking into account applicable reversionary and
overriding royalty interests.
   

        The present values of the estimated net cash flows attributable to the
1991-1 Partnership's Proved Reserves were calculated by discounting the future
net cash flows to present value at the rate of 10% per year, as prescribed by
SEC regulations covering reserve reporting for financial disclosure purposes.
The discount factor is intended to reflect the timing of future net cash flows.
No further discount or risk adjustment was applied. Present value, regardless of
the discount rate used, is materially affected by assumptions as to timing of
future production, which may prove to have been inaccurate.
    

   
        Other Assets and Liabilities. The tax-basis balances of the 1991-1
Partnership's equipment, excluding the Umbrella Point field equipment,
aggregated $2,555 at December 31, 1994, and the net book value of its current
assets and liabilities as of June 30, 1995 reflect a balance of $85,716,
excluding property held for sale. The equipment value and net current assets are
based upon the 1991-1 Partnership's 1994 year-end tax accounting records and
June 30, 1995 unaudited financial statements, respectively, maintained in
accordance with the applicable provisions of the 1991-1 Partnership Agreement.
    

   
        Benton believes that valuing the 1991-1 Partnership's equipment
(comprised of oil and gas production and transportation facilities) at its
tax-basis balances is favorable to the sellers of the producing properties since
many purchasers in transactions evaluated by Benton, as part of its on-going
involvement in the production area, allocate nominal value to well equipment on
the theory that its salvage value at the end of the commercial lives of acquired
wells will approximate the cost of plugging and abandoning the wells. Benton
believes that the original cost of the equipment less the deductions computed
through 1994 year end for tax purposes represents a reasonable approximation of
the fair market value of the equipment to Benton. Benton also believes that
valuing the current assets and liabilities of the 1991-1 Partnership (comprised
of cash and intercompany receivable) at their book value as of June 30, 1995 is
appropriate to reflect the fair market value of these items, which are expected
to be collected and paid to Benton, to the extent outstanding, in the stated
amounts reflected in the 1991-1 Partnership's unaudited balance sheet as of that
date.
    

   
        General Intangibles. In determining the value attributed to General
Intangibles, Benton evaluated the success to date of the 1991-1 Partnership,
total consideration paid to date to the participants and the value to Benton of
dissolving and liquidating the 1991-1 Partnership so that Benton can focus on
its current operations and reduce the administrative burdens associated with
operating the Partnership. Based upon Benton's evaluation of historical
administrative costs for the 1991-1 Partnership, Benton estimates that the
administrative costs for operating the Partnership will be approximately $30,000
per year. From inception through September 1995, the 1991-1 Partnership has made
cash distributions to participants aggregating $338,182, or $1,200 per 1991-1
Unit. In forming the 1991-1 Partnership, Benton sold an aggregate of $1,409,091
in 1991-1 Units. Benton acknowledges the concerns raised by the Investors in the
1991-1 Partnership with regard to operations of the Partnership, the lack of
success and thus the disappointing returns on investment by the Investors.
Because many of the Investors are or were stockholders of Benton, 
    

                                       64


<PAGE>   78

   
Benton desires to maintain a good relationship with these stockholders, many of
whom have been strong supporters of Benton from inception, and Benton desires
to avoid future claims against it by participants relating to the management of
the Partnership. See "The Exchange Offer and Proposal -- Litigation and Related
Matters." Assuming that the Investor in the 1991-1 Partnership elects to hold
his or her shares of Common Stock and exercises his or her Warrants at the end
of the three-year term, and the market price of the Common Stock is at or above
approximately $16.75 per share, Benton believes that the Investors in the
1991-1 Partnership, will have received consideration in the form of cash
distributions, Common Stock and Warrants in excess of the initial investment in
the 1991-1 Partnership, without regard to any tax benefits received by the      
participants. On October 2, 1995, the last sales price of the Benton Common
Stock on NASDAQ National Market was $11.13 per share. The assumed market price
of the Common Stock of $16.75 per share discussed above represents a 34%
increase in the market value of the Benton Common Stock during the three year
term of the Warrants. There can be no assurance that the market price of the
Benton Common Stock will increase or that such price will be achieved. The
value of the General Intangibles of the Partnership is not subject to valuation
by third parties since the General Intangibles do not represent actual assets
of the Partnership. Benton believes that the participants in the Partnership
will not receive any value for the General Intangibles in any alternative to
the Exchange.     

         Subsequent Adjustments. The Exchange Values will not be adjusted to
reflect changes after December 31, 1994 in the present value of the estimated
future net cash flows attributable to the 1991 - 1 Partnership's Proved
Reserves. No adjustments will be made to the Exchange Values on account of
changes in demand for or costs or prices of oil and gas that differ from the
assumptions employed or other market related events after December 31, 1994,
although those could affect the value of the 1991 - 1 Units.

   
                 RECOMMENDATION OF THE MANAGING GENERAL PARTNER

MANAGING GENERAL PARTNER'S REASONS FOR PROPOSING THE EXCHANGE OFFER
    

         As Managing General Partner, Benton initiated and has proposed the
Exchange Offer and has recommended the approval of the Proposals. Benton's
decision is based on its conclusion that the Exchange will be more beneficial to
Investors than the alternatives of continuing the Partnerships or liquidating
all of the assets of the Partnerships and that the terms of the Exchange Offer
and related Proposals, including the method used to determine the Exchange
Values and the procedures involved in the Proposals, are both fair and
appropriate.

         The Managing General Partner, in reaching its conclusion to recommend
that each of the Investors accept the Exchange Offer and approve the Proposals,
considered a number of factors, including, without limitation, the following:

   
         (a) The financial condition, results of operations and cash flows of
Benton and each of the Partnerships, both on a historical and a prospective
basis. The Managing General Partner has reviewed the financial condition,
results of operations and cash flows of Benton and each of the Partnerships, on
a historical and a prospective basis. The Managing General Partners' analysis of
the future prospects for each of the Partnerships indicates declining
distributions to the investors. See "--Benefits of Continued Operations". For
the years ended December 31, 1992, 1993 and 1994 and the six months ended June
30, 1994 and 1995, Benton had total revenues of $8,622,000, $7,503,000,
$34,705,000, $12,160,000 and $25,870,000, respectively. For the years ended
December 31, 1992 and 1993, Benton had a net loss of $2,909,000 and $4,829,000,
respectively, compared to net income of $2,954,000 for the year ended December
31, 1994 and net income of $2,000 and $3,152,000 for the six months ended June
30, 1994
    


                                       65

<PAGE>   79

   
and 1995. Benton's ability to access additional capital and its more diverse
operations and oil and gas prospects in Venezuela, the Gulf Coast and Russia
could continue to contribute to significant increases in Benton's results of
operations and cash flow.
    

   
         (b) Current market conditions and historical market prices, volatility
and trading information with respect to the Common Stock of Benton, compared to
the lack of a trading market for the Partnership Units. In this regard, the
Managing General Partner considered the potential growth rate and market price
to earnings potential of Benton. The Managing General Partner believes that the
Investors will receive the benefit of any future growth in the value of their
equity interest in Benton rather than receiving cash distributions from the
Partnerships, which are likely to decrease rapidly as the remaining oil and
natural gas reserves of the Partnerships are depleted. Concerns raised by
several Investors in the Partnerships are indicative to the Managing General
Partner of the desire of many Investors to liquidate their investment in the
Partnership. The Managing General Partner's analysis of continuation of the
Partnerships indicate that distributions are likely to decrease rapidly over the
short economic life of the Partnerships. Although Benton is restricted from
paying cash dividends to its stockholders, the Managing General Partner
concluded that the Exchange Offer will allow for liquidation of their investment
for those Investors who so desire, while allowing other Investors to retain an
equity interest in the oil and gas industry through ownership of Benton Common
Stock, with access to a public trading market if and when he or she desires to
liquidate the investment.
    

   
         (c) Plugging Costs to be Incurred if Partnerships Continue.
Distributions to the Investors in connection with the Exchange Offer allow for
distributions undiminished by ongoing Partnership plugging costs, which the
Managing General Partner estimates through the life of the Partnership to be
$247, $160 and $56 per Unit for the 1989 - 1 Partnership, the 1990 - 1
Partnership and the 1991 - 1 Partnership, respectively. The Managing General
Partner's analysis of the continuation of the Partnerships indicates that the
economic life of each of the Partnerships is short. "See -- Managing General
Partner's Determination that Exchange Offer is Fair -- Alternatives to the
Exchange." Based upon this analysis, the Managing General Partner concluded that
the Exchange Offer allows the Investors to receive distributions from the
Partnerships without reduction for plugging costs, which Benton estimates will
represent 76.7%, 54.6%, and 33.5% of total distributions to Investors in the
1989-1 Partnership, the 1990-1 Partnership and the 1991-1 Partnership if each
such Partnership continues to operate through its respective economic life.
    

         (d) Liquidity of the Common Stock of Benton compared to the lack of
liquidity of the Partnership Units. The Common Stock of Benton has an active
trading market on NASDAQ - NMS. However, the Warrants that will be received in
the Exchange Offer do not currently have a public trading market. The
Partnership Units have no liquidity, and the Partnership Agreement restricts
transfer of the Partnership Units.

   
         (e) Favorable terms of Exchange Offer. The terms and conditions of the
Exchange Offer, including the amount of consideration to be paid the Investors
and the form of the consideration, the parties' representations, warranties,
covenants and agreements, and the conditions to their respective obligations set
forth in the Exchange Offer. The Managing General Partner deemed that the
Exchange Offer is favorable to each of the Partnerships' Investors. In reaching
this conclusion, the Managing General Partner noted the nature of the
representations and warranties and the limited number of conditions in the
Exchange Offer. The Managing General Partner believes that in the absence of
extraordinary or unforeseen circumstances, there is a high likelihood that the
transaction will be completed, subject to the requisite approval of the
Partnerships' Investors. Accordingly, the Managing
    


                                       66

<PAGE>   80

General Partner believes that the Exchange Offer is more favorable to each of
the Investors than purchase and sale agreements that are customarily entered
into.

   
         (f) The review of other alternatives for the Partnerships, including
possible sales of Partnership assets to third parties, continued operation of
the Partnerships and liquidation of the Partnerships. The Managing General
Partner did not believe that the sale of all of the assets of any of the
Partnerships were as attractive to the Partnerships as the Exchange Offer
because of the premium over the value of the reserves being offered by Benton in
the Exchange Offer, the uncertainty that a third party purchaser could be found
for all of the assets, and if found, whether a purchase and sale agreement could
be negotiated on terms favorable to the Partnerships. The only third party offer
received by the Managing General Partner which resulted in an agreement for
purchase of a substantial portion of the Partnerships' properties was the cash
offer from Goldking, described herein. For a discussion of the Managing General
Partner's efforts to solicit purchasers of the Partnerships' assets, see
"Background of Exchange Offer." If the Goldking sale is consummated, an Investor
may elect to receive cash in lieu of the Common Stock he would receive in the
Exchange Offer, if such election is made on the Letter of Transmittal to be used
in accepting the Exchange Offer. The Managing General Partner did not believe
that the continued operation of the Partnerships was as attractive to the
Partnerships as the Exchange Offer because the Managing General Partner believes
that the continued cash distributions made by the Partnerships are likely to
decrease rapidly as the remaining oil and natural gas reserves are depleted. The
Managing General Partner did not believe that liquidation of the Partnership was
as attractive to the Partnerships as the Exchange Offer because the estimated
liquidation values of the Partnerships are substantially less than the
consideration to be received by each of the Investors under the Exchange Offer.
See " -- Managing General Partner's Determination that Exchange Offer is Fair --
Alternatives to the Exchange."
    

   
         (g) Risks inherent in the oil and gas industry. Inherent in the oil and
gas industry are many uncertainties and risks. The Managing General Partner
considered the possibilities that changes in the industry and continued
volatility of oil and gas prices could have a significantly greater effect on
the Partnership due to the Partnership's size compared to Benton and the greater
diversification of oil and gas properties and prospects of Benton. However, the
Managing General Partner also considered that increases in the price of oil and
gas could have a more direct effect to the investors if the Partnership assets
were owned by the Partnership rather than Benton due to the size of the
Partnership, the cash distributions to the investors from the Partnerships and
the percentage ownership in the Partnership of each of the investors. However,
Benton believes that an increase in oil and gas prices could generally increase
revenues of Benton and could corresponding increase the market price of the
Benton Common Stock.
    

   
         (h) Restrictions on cash dividends. Benton is restricted under certain
credit agreements from paying cash dividends to its stockholders and the
Investors could continue to receive cash distributions from the Partnership.
However, the Managing General Partner believes that the cash distributions to
the Investors from each of the Partnerships will likely decrease rapidly as the
remaining oil and natural gas reserves are depleted. See " -- Managing General
Partner's Determination that Exchange Offer is Fair -- Alternatives to the
Exchange." Although Benton is restricted from paying cash dividends to its
stockholders, the Managing General Partner concluded that Investors who desire
cash distributions can liquidate their Benton Common Stock and make alternate
investment decisions, but those Investors will not similarly be able to
liquidate their investment in the Partnership Units as cash distributions from
the Partnerships decrease.
    

   
         (i) Tax consequences. Upon the Exchange of the Partnership Units for
Common Stock and Warrants, investors will recognize gain equal to the amount by
which the fair market value of the

    

                                       67

<PAGE>   81
   
Common Stock and Warrants received by them exceeds their respective bases in the
Partnership Units exchanged therefore. Thus, an investor will have immediate tax
consequences in connection with the Exchange Offer and liquidation of the
Partnerships, and could be required to pay cash for such tax liabilities, even
though the investor receives only Common Stock and Warrants in connection with
the Exchange. However, the Managing General Partner believes that the total
consideration to be received by an investor in the Partnerships, net of the tax
consequences to such investor, is more beneficial to the investors than
continuation of the Partnerships.
    

   
         (j) Concerns of Investors. The Managing General Partner also considered
the concerns expressed by the many Investors in the Partnerships regarding the
historical performance and continued operation of each of the Partnerships and
their respective properties, including the litigation instituted by certain of
the Investors. The Managing General Partner recognizes these concerns and
concluded that it must recommend to the Investors a favorable alternative to
continuation of the Partnerships. Based upon the analysis of alternatives to the
Exchange Offer, the Managing General Partner must determine to recommend the
Exchange Offer as the most favorable alternative to the Investors. See " --
Managing General Partner's Determination that Exchange Offer is Fair --
Alternatives to the Exchange."
    

   
         In view of the wide variety of factors considered in connection with
its evaluation of the terms of the Exchange, the Managing General Partner did
not find it practicable to, and did not, quantify or otherwise attempt to assign
relative weights to the specific factors considered in reaching its
determination.
    

   
MANAGING GENERAL PARTNER'S DETERMINATION THAT EXCHANGE OFFER IS FAIR
    

         THE MANAGING GENERAL PARTNER OF EACH OF THE PARTNERSHIPS HAS DETERMINED
THAT THE EXCHANGE IS FAIR AND IS IN THE BEST INTERESTS OF THE PARTNERSHIPS AND
THEIR RESPECTIVE PARTNERS AND HAS RECOMMENDED THAT THE PARTNERS OF EACH OF THE
PARTNERSHIPS TENDER THEIR PARTNERSHIP UNITS AND CONSENT TO THE PARTNERSHIP
PROPOSALS. THE EXCHANGE OFFER IS NOT CONDITIONED UPON ACCEPTANCE AND APPROVAL BY
ALL OF THE PARTNERSHIPS AND THE MANAGING GENERAL PARTNER BELIEVES THAT THE OFFER
IS FAIR TO ALL INVESTORS, REGARDLESS OF WHICH OR THE NUMBER OF PARTNERSHIPS
WHICH ACCEPT THE EXCHANGE OFFER FOR THE REASONS SET FORTH BELOW.

   
         General. The Managing General Partner has analyzed the terms of the
Exchange Offer, the consideration and value offered to the Investors in exchange
for their Partnership Units and the value of consideration an Investor could
expect to receive under various alternatives to the Exchange. In determining
that the Exchange Offer is fair to the Investors, the Managing General Partner
considered that the Investors who do not accept the Exchange Offer or who do not
elect to receive cash in lieu of Benton Common Stock will receive Common Stock
and Warrants of Benton, and could receive cash if the Partnerships were
continued or liquidated. However, the Managing General Partner believes that
because an Investor may elect to receive cash in lieu of Common Stock if the
sale to Goldking is consummated, the Investors will receive consideration in
excess of the alternatives to the Exchange if the Exchange Offer is accepted.
The Managing General Partner's analysis of the consideration an Investor could
receive under the alternatives to the Exchange are discussed below. The Managing
General Partner believes that those Investors who receive Benton Common Stock
will have access to a public trading market if such Investor elects to liquidate
his investment for cash. The average daily trading volume for the Benton Common
Stock on the NASDAQ National Market for the 30 trading days ended September 27,
1995 was 259,000 shares. The Managing General Partner believes that since the
maximum aggregate number of shares of Benton Common Stock that will be issued in
the Exchange
    


                                       68

<PAGE>   82

   
Offer for all three Partnerships is 171,880, the issuance will have no material
effect on the market value of the Benton Common Stock, and may allow all
Investors receiving shares of Benton Common Stock in connection with the
Exchange Offer and liquidation of the Partnerships to liquidate their investment
in the market.
    

   
         The Managing General Partner believes that the Exchange Offer is fair
to all Investors, regardless of which or the number of Partnerships which accept
the Exchange Offer. The assets of the Partnerships which Benton will acquire if
the Exchange Offer is accepted and approved by each of the Partnerships are
immaterial to the total asset value of Benton. See "Unaudited Pro Forma
Financial Information."
    

   
         Alternatives to the Exchange. The Managing General Partner's analysis
of the most probable results of continuing the Partnerships indicate that, while
continuing the Partnerships would avoid the risks associated with the ownership
of Common Stock in Benton, Investors will receive potentially greater values by
participating in the Exchange than they would derive from this alternative.
Benton estimates that continuing the 1989-1 Partnership under market and
operating conditions prevailing in 1994 would likely generate decreasing annual
distributions of $114 per 1989-1 Unit in 1995, $146 in 1996, $91 in 1997 and $7
in 1998. Benton estimates that the remaining economic life of the 1989-1
Partnership is 3.5 years. Benton estimates that continuing the 1990-1
Partnership under market and operating conditions prevailing in 1994 would
likely generate decreasing annual distributions of $97 per 1990-1 Unit in 1995,
$119 in 1996, $76 in 1997, $30 in 1998, $10 in 1999 and $1 in 2,000. Benton
estimates that the remaining economic life of the 1990-1 Partnership is 5.5
years. Benton estimates that continuing the 1991-1 Partnership under market and
operating conditions prevailing in 1994 would likely generate decreasing annual
distributions of $61 per 1991-1 Unit in 1995, $83 in 1996, $40 in 1997 and $0 in
1998. Benton estimates that the remaining economic life of the 1991-1
Partnership is 2.5 years. Benton believes that the Partnerships will have no
residual value in their assets at the end of the economic life of the respective
Partnerships.
    

   
         The Managing General Partner also believes that, while liquidating the
Partnerships through the sale of assets for cash would provide an immediate cash
return and avoid the risks associated with owning Benton Common Stock, the
Exchange will provide Investors with greater values than they would likely
receive in liquidation of the Partnerships. Benton's liquidation analysis
reflects an estimated liquidation value of approximately $294,634, $1,052,601
and $240,998 of the 1989-1 Partnership, the 1990-1 Partnership and the 1991-1
Partnership, respectively, or $1,045, $742 and $855 per 1989-1 Unit, 1990-1 Unit
and 1991-1 Unit, respectively. Benton received an independent offer from
Goldking to purchase each of the Partnership's interest in the Umbrella Point
Field (which price represents 99.3%, 88.1% and 88.0% of the total Proved Reserve
estimates of the 1989-1 Partnership, the 1990-1 Partnership and the 1991-1
Partnership, respectively) for an estimated total purchase price in cash of
$1,439,443 as of June 30, 1995, subject to adjustments. This estimated purchase
price would represent potential cash distributions to the Investors equal to
$1,147, $656 and $657 per 1989-1 Unit, 1990-1 Unit and 1991-1 Unit,
respectively. Benton's liquidation analysis is based on the anticipated proceeds
from the sale of the Umbrella Point Field to Goldking, plus working capital for
the Partnership at June 30, 1995, less estimated general and administrative
costs involved in liquidation of the Partnership. For purposes of determining
the general and administrative costs to the Partnership, Benton estimated that
general and administrative expenses would approximate the general and
administrative expenses incurred by the Partnership during the year ended
December 31, 1994.
    

         The following tables summarize the results of Benton's liquidation
analysis in comparison to the Exchange Values for the Partnership Units
determined by Benton. The table also includes valuation data


                                       69

<PAGE>   83

derived from Benton's analysis of continuing the Partnerships. Benton did not
undertake its continuation analysis for the purpose of valuing the Partnerships,
but solely to illustrate the likelihood of decreasing distributions based on oil
and gas prices at December 31, 1994. However, because SEC disclosure standards
for roll up transactions require a comparison of the value of the consideration
offered in the transaction with the value of the consideration estimated for
each alternative to the transaction, the tables also reflect the results of
extending Benton's continuation analysis for the balance of the estimated life
of the Partnerships' Proved Reserves, and discounting the projected stream of
distributions to present value at the same 10% discount rate used in Benton's
liquidation analysis to account for the timing of cash flows as well as
production and concentration risks.


                                       70

<PAGE>   84

                              1989 - 1 PARTNERSHIP

   
<TABLE>
<CAPTION>
                                                               TOTAL             VALUE PER
VALUATION METHOD                                         INVESTOR VALUE(1)     1989 - 1 UNIT
- ----------------                                         -----------------     -------------
<S>                                                      <C>                   <C>
Exchange Value.........................................       $370,098             $1,312
Liquidation value estimated by Benton..................        294,634              1,045
Continuation analysis by Benton assuming natural gas
    prices of $1.63 per Mcf and oil prices of $15.94
    per Bbl(2).........................................         90,661                322
Value of Proved Reserves at December 31, 1994(3).......        325,540              1,155
</TABLE>
    

(1)   The Exchange Value and liquidation value attribute no value to Managing
      General Partners' interests. The continuation analysis assumes continued
      distributions to the Managing General Partner pursuant to the terms of the
      Partnership Agreement.

(2)   The assumed natural gas and oil prices are the prices used for preparation
      of the Partnership's reserve report at December 31, 1994. The continuation
      analysis was calculated based upon Benton's estimate of the remaining
      economic life of the Partnership, estimated to be 3.5 years.

   
(3)   Based on the Partnership's December 31, 1994 reserve report prepared by
      Benton and audited by Huddleston. The reserves are valued as of December
      31 of each year, based on oil and natural gas prices as of that date.
      Market prices for both oil and natural gas are subject to a significant
      degree of variation, and this variation will affect the calculation of
      future net cash flows reported by the Partnership at any specific date.
    

                              1990 - 1 PARTNERSHIP

   
<TABLE>
<CAPTION>
                                                               TOTAL             VALUE PER
VALUATION METHOD                                         INVESTOR VALUE(1)     1990 - 1 UNIT
- ----------------                                         -----------------     -------------
<S>                                                      <C>                   <C>
Exchange Value.........................................      $2,990,728            $2,107
Liquidation value estimated by Benton..................       1,052,601               742
Continuation analysis by Benton assuming natural gas
    prices of $1.63 per Mcf and oil prices of $15.94
    per Bbl(2).........................................         415,355               293
Value of Proved Reserves at December 31, 1994(3).......       1,057,123               745
</TABLE>
    

(1)   The Exchange Value and liquidation value attribute no value to Managing
      General Partners' interests. The continuation analysis assumes continued
      distributions to the Managing General Partner pursuant to the terms of the
      Partnership Agreement.

(2)   The assumed natural gas and oil prices are the prices used for preparation
      of the Partnership's reserve report at December 31, 1994. The continuation
      analysis was calculated based upon Benton's estimate of the remaining
      economic life of the Partnership, estimated to be 5.5 years.

   
(3)   Based on the Partnership's December 31, 1994 reserve report prepared by
      Benton and audited by Huddleston. The reserves are valued as of December
      31 of each year, based on oil and natural gas prices as of that date.
      Market prices for both oil and natural gas are subject to a significant
      degree of variation, and this variation will affect the calculation of
      future net cash flows reported by the Partnership at any specific date.
    


                                       71

<PAGE>   85

                              1991 - 1 PARTNERSHIP

   
<TABLE>
<CAPTION>
                                                                 TOTAL             VALUE PER
VALUATION METHOD                                           INVESTOR VALUE(1)     1991 - 1 UNIT
- ----------------                                           -----------------     -------------
<S>                                                        <C>                   <C>
Exchange Value...........................................       $692,349             $2,456
Liquidation value estimated by Benton....................        240,998                855
Continuation analysis by Benton assuming natural gas
    prices of $1.63 per Mcf and oil prices of $15.94
    per Bbl(2)...........................................         47,072                167
Value of Proved Reserves at December 31, 1994(3).........        210,445                747
</TABLE>
    

(1)  The Exchange Value and liquidation value attribute no value to Managing
     General Partners' interests. The continuation analysis assumes continued
     distributions to the Managing General Partner pursuant to the terms of the
     Partnership Agreement.

(2)  The assumed natural gas and oil prices are the prices used for preparation
     of the Partnership's reserve report at December 31, 1994. The continuation
     analysis was calculated based upon Benton's estimate of the remaining
     economic life of the Partnership, estimated to be 2.5 years.

   
(3)  Based on the Partnership's December 31, 1994 reserve report prepared by
     Benton and audited by Huddleston. The reserves are valued as of December 31
     of each year, based on oil and natural gas prices as of that date. Market
     prices for both oil and natural gas are subject to a significant degree of
     variation, and this variation will affect the calculation of future net
     cash flows reported by the Partnership at any specific date.
    

         The actual amount that Investors would receive if the Partnerships
continued their respective operations would depend on production levels, which
cannot be predicted with certainty. In addition, the actual amount that
Investors would receive under either of the alternatives to the Exchange would
depend on future oil and gas prices. To the extent that future prices for those
commodities are materially higher or lower than the pricing assumptions made by
the Managing General Partner, those fluctuations would likely have a similar
effect on the operating results, distribution rates and market value of the
Partnership Units, largely negating the effect of price changes on a comparison
between the Exchange and either alternative of continuing the Partnerships or
liquidating their assets. In addition, Benton believes that liquidating the
Partnerships would deprive Investors of the opportunity to benefit from any
future upturn in oil and gas prices.

BENEFITS OF CONTINUED OPERATIONS

   
         The 1989-1 Partnership. Continuing to operate the 1989-1 Partnership
could benefit the Investors by avoiding many of the risks associated with owning
Benton Common Stock. In addition, Benton does not pay cash dividends on its
shares of Common Stock and does not anticipate paying dividends in the
foreseeable future. However, Benton's continuation analysis reflects a present
value that is $322 per 1989-1 Unit, or $990 per 1989-1 Unit below the Exchange
Value. Accordingly, Benton believes that Investors are likely to receive less
value if the 1989-1 Partnership continues in its present form than they would
receive by participating in the Exchange. While this conclusion is supported by
Benton's analysis of continuing the 1989-1 Partnership, there can be no
assurance that the Exchange will be more beneficial to Investors than continuing
the 1989-1 Partnership.
    

         In determining that the 1989-1 Partnership had reached the stage in
its production history when consideration of the Exchange Offer became
appropriate, the Managing General Partner evaluated the anticipated results of
continuing the 1989-1 Partnership.


                                       72

<PAGE>   86

         The Managing General Partner's continuation analysis for the 1989-1
Partnership is based upon the Partnership's reserve report at December 31, 1994,
prepared by the Managing General Partner and audited by Huddleston. The
continuation analysis assumes revenues, taxes and expenses will be allocated to
participants and the Managing General Partner in the percentages set forth in
the 1989-1 Partnership Agreement. Based upon these assumptions, and further
discounted at 10%, the cash flow to the participants for the years indicated are
as follows:

                               1989-1 PARTNERSHIP
                             CONTINUATION ANALYSIS

<TABLE>
<CAPTION>
      YEAR                     TOTAL CASH FLOW(1)         CASH FLOW PER UNIT (2)
      ----                     ------------------         ----------------------
<S>                            <C>                        <C>
      1995                          $30,640                        $109
      1996                           37,445                         133
      1997                           21,150                          75
      1998                            1,426                           5
                                    -------                        ----

    TOTAL(3)                        $90,661                        $322
                                    =======                        ====
</TABLE>

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

(1)      Reflects total cash flow allocated to participants of the 1989-1
         Partnership, after allocation of cash flow to Managing General
         Partner's interest pursuant to the terms of the 1989-1 Partnership
         Agreement.

(2)      Obtained by dividing the total cash flow by 281.8182 Partnership Units.

(3)      Benton's continuation analysis estimates that the remaining economic
         life of the 1989-1 Partnership is 3.5 years. This analysis assumes that
         total revenues, production taxes and lease operating expenses will be
         consistent with those assumptions set forth in the 1989-1 Partnership
         reserve report dated December 31, 1994, and that annual general and
         administrative expenses will be consistent with actual general and
         administrative expenses incurred by the 1989-1 Partnership for the year
         ended December 31, 1994. The continuation analysis assumes capital
         expenditures during 1995 based upon actual capital expenditures through
         June 30, 1995 and assumes capital expenditures thereafter consistent
         with those set forth in the Partnership's reserve report.
   
         The 1990-1 Partnership. Continuing to operate the 1990-1 Partnership
could benefit the Investors by avoiding many of the risks associated with owning
Benton Common Stock. In addition, Benton does not pay cash dividends on its
shares of Common Stock and does not anticipate paying dividends in the
foreseeable future. However, Benton's continuation analysis reflects a present
value that is $293 per 1990-1 Unit, or $1,813 per 1990-1 Unit below the Exchange
Value. Accordingly, Benton believes that Investors are likely to receive less
value if the 1990-1 Partnership continues in its present form than they would
receive by participating in the Exchange. While this conclusion is supported by
Benton's analysis of continuing the 1990-1 Partnership, there can be no
assurance that the Exchange will be more beneficial to Investors than continuing
the 1990-1 Partnership.
    

                                       73

<PAGE>   87

         In determining that the 1990-1 Partnership had reached the stage in its
production history when consideration of the Exchange Offer became appropriate,
the Managing General Partner evaluated the anticipated results of continuing the
1990-1 Partnership.


                                       74

<PAGE>   88

         The Managing General Partner's continuation analysis for the 1990-1
Partnership is based upon the Partnership's reserve report at December 31, 1994,
prepared by the Managing General Partner and audited by Huddleston. The
continuation analysis assumes revenues, taxes and expenses will be allocated to
participants and the Managing General Partner in the percentages set forth in
the 1990-1 Partnership Agreement. Based upon these assumptions, and further
discounted at 10%, the cash flow to the participants for the years indicated are
as follows:

                               1990-1 PARTNERSHIP

                             CONTINUATION ANALYSIS

<TABLE>
<CAPTION>
        YEAR                  TOTAL CASH FLOW(1)           CASH FLOW PER UNIT(2)
        ----                  ------------------           ----------------------
        <S>                   <C>                          <C>
        1995                       $131,114                         $92
        1996                        153,178                         108
        1997                         89,495                          63
        1998                         31,851                          22
        1999                          9,253                           7
        2000                            464                           1
                                   --------                        ----

     TOTAL (3)                     $415,355                        $293
                                   ========                        ====
</TABLE>

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

(1)      Reflects total cash flow allocated to participants of the 1990-1
         Partnership, after allocation of cash flow to Managing General
         Partner's interest pursuant to the terms of the 1990-1 Partnership
         Agreement.

(2)      Obtained by dividing the total cash flow by 1,419.192 Partnership
         Units.

(3)      Benton's continuation analysis estimates that the remaining economic
         life of the 1990-1 Partnership is 5.5 years. This analysis assumes that
         total revenues, production taxes and lease operating expenses will be
         consistent with those assumptions set forth in the 1990-1 Partnership
         reserve report dated December 31, 1994, and that annual general and
         administrative expenses will be consistent with actual general and
         administrative expenses incurred by the 1990-1 Partnership for the year
         ended December 31, 1994. The continuation analysis assumes capital
         expenditures during 1995 based upon actual capital expenditures through
         June 30, 1995 and assumes capital expenditures thereafter consistent
         with those set forth in the Partnership's reserve report.
   
         The 1991-1 Partnership. Continuing to operate the 1991-1 Partnership
could benefit the Investors by avoiding many of the risks associated with owning
Benton Common Stock. In addition, Benton does not pay cash dividends on its
shares of Common Stock and does not anticipate paying dividends in the
foreseeable future. However, Benton's continuation analysis reflects a present
value that is $167 or $2,290 per 1991-1 Unit below the Exchange Value.
Accordingly, Benton believes that Investors are likely to receive less value if
the 1991-1 Partnership continues in its present form than they would receive by
participating in the Exchange. While this conclusion is supported by Benton's
analysis of continuing the 1991-1 Partnership, there can be no assurance that
the Exchange will be more beneficial to Investors than continuing the 1991-1
Partnership.
    

                                       75

<PAGE>   89

         In determining that the 1991-1 Partnership had reached the stage in its
production history when consideration of the Exchange Offer became appropriate,
the Managing General Partner evaluated the anticipated results of continuing the
1991-1 Partnership.

         The Managing General Partner's continuation analysis for the 1991-1
Partnership is based upon the Partnership's reserve report at December 31, 1994,
prepared by the Managing General Partner and audited by Huddleston. The
continuation analysis assumes revenues, taxes and expenses will be allocated to
participants and the Managing General Partner in the percentages set forth in
the 1991-1 Partnership Agreement. Based upon these assumptions, and further
discounted at 10%, the cash flow to the participants for the years indicated are
as follows:

                               1991-1 PARTNERSHIP

                             CONTINUATION ANALYSIS

<TABLE>
<CAPTION>
       YEAR                   TOTAL CASH FLOW(1)           CASH FLOW PER UNIT(2)
       ----                   ------------------           ---------------------
       <S>                    <C>                          <C>
       1995                         $16,472                         $58
       1996                          21,258                          75
       1997                           9,342                          34
                                    -------                        ----

     TOTAL(3)                       $47,072                        $167
                                    =======                        ====
</TABLE>

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

(1)      Reflects total cash flow allocated to participants of the 1991-1
         Partnership, after allocation of cash flow to Managing General
         Partner's interest pursuant to the terms of the 1991-1 Partnership
         Agreement.

(2)      Obtained by dividing the total cash flow by 281.8182 Partnership Units.

(3)      Benton's continuation analysis estimates that the remaining economic
         life of the 1991-1 Partnership is 2.5 years. This analysis assumes that
         total revenues, production taxes and lease operating expenses will be
         consistent with those assumptions set forth in the 1991-1 Partnership
         reserve report dated December 31, 1994, and that annual general and
         administrative expenses will be consistent with actual general and
         administrative expenses incurred by the 1991-1 Partnership for the year
         ended December 31, 1994. The continuation analysis assumes capital
         expenditures during 1995 based upon actual capital expenditures through
         June 30, 1995 and assumes capital expenditures thereafter consistent
         with those set forth in the Partnership's reserve report.

BENEFITS OF LIQUIDATION
   
         The 1989-1 Partnership. If the 1989-1 Partnership liquidated its
assets and completed a dissolution upon the sale of its assets for cash, the
Investors would benefit by receiving an immediate cash return without continuing
to be subject to the risks of owning Benton Common Stock and Warrants and risks
of participation in oil and gas operations. In addition, if the 1989-1
Partnership were liquidated in a cash transaction, the Investors could reinvest
the proceeds in similar or different investments. For the reasons described
below, however, Benton believes that liquidating the 1989-1 Partnership would
not provide Investors with greater values than those they would receive in the
Exchange. Although Benton
    

                                       76

<PAGE>   90

made various assumptions that it believes to be reasonable in conducting the
liquidation analysis supporting this conclusion, there can be no assurance that
those assumptions would ultimately prove to be correct and that proceeds of a
cash sale would not exceed the value of the Common Stock and Warrants issuable
in the Exchange.

   
         Benton's decision to recommend the approval of the Proposal is
supported by its internal liquidation analysis, reflecting a liquidation value
of $294,634 or $1,045 per 1989-1 Unit. It is further supported by an independent
offer to purchase the 1989-1 Partnership's interest in the Umbrella Point Field
by Goldking (which price represents 99.3% of the total Proved Reserve
estimates of the 1989-1 Partnership) for a total purchase price in cash of
$323,296. This purchase price would represent cash distributions to the
Investors, following satisfaction of current liabilities, equal to $1,147 per
1989-1 Unit. Based on these factors, Benton has concluded that, while an asset
sale in liquidation of the 1989-1 Partnership might result in limited
third-party interest in the 1989-1 Partnership's most significant asset, and a
sale of the Partnership's properties as a whole would provide an immediate
cash return to Investors, it would likely result in valuations by an
unaffiliated bidder below the Total Exchange Value, and further, any cash
received would likely be equal to or less than the liquidation value after
payment of transaction costs and costs associated with liquidation and
dissolution, if another third party was willing to purchase only the assets of
the 1989-1 Partnership. Benton has not conditioned this Exchange Offer on
approval by the other Partnerships described herein, but believes that a third
party would significantly discount the value of the Partnership's properties if
it could not purchase the working interests owned by all three Partnerships.
Additionally, Benton has assumed sole responsibility for payment of all
transaction costs associated with the Exchange Offer, allowing distribution of
consideration without deduction for such costs. Benton believes it unlikely
that a third party would offer to purchase the Partnership's assets, and also
assume responsibility for payment of transaction costs.
    


                                       77

<PAGE>   91

                               1989-1 PARTNERSHIP

                              LIQUIDATION ANALYSIS
   
<TABLE>
<S>                                                                    <C>
Estimated Cash Proceeds from Sale of Umbrella Point Field...........   $323,296

Working Capital (1).................................................      6,338

General and Administrative Expense(2)...............................    (35,000)
                                                                       --------
         Net Aggregate Liquidation Value............................   $294,634
                                                                       ========

         Liquidation Value Per Unit(3)..............................   $  1,045
                                                                       ========
</TABLE>
    
- -------------------------
   
         (1)      At June 30, 1995, the 1989-1 Partnership had current assets,
                  less property held for sale, of $6,338, and liabilities of $0,
                  resulting in a working capital balance of $6,338, excluding
                  the property held for sale.

         (2)      Estimated expenses to the Partnership in preparing the
                  Partnership financial statements, tax returns, Investor tax
                  statements and similar administrative matters. This estimate
                  was determined based upon the actual expenses incurred by the
                  1989-1 Partnership for general and administrative expense for
                  the year ended December 31, 1994.

         (3)      Obtained by dividing the net aggregate liquidation value by
                  281.8182 Partnership Units. No liquidation value has been
                  attributed to the Managing General Partners' interest.

         Benton's liquidation analysis assumed that a Majority in Interest of
the Investors would approve the sale of all or substantially all of the 1989-1
Partnership's assets, as required under the 1989-1 Partnership Agreement. Based
on this analysis, the Managing General Partner concluded that Investors would
benefit more from the Exchange than a potential liquidation of the 1989-1
Partnership.

         The 1990-1 Partnership. If the 1990-1 Partnership liquidated its
assets and completed a dissolution upon the sale of its assets for cash, the
Investors would benefit by receiving an immediate cash return without continuing
to be subject to the risks of owning Benton Common Stock and Warrants and risks
of participation in oil and gas operations. In addition, if the 1990-1
Partnership were liquidated in a cash transaction, the Investors could reinvest
the proceeds in similar or different investments. For the reasons described
below, however, Benton believes that liquidating the 1990-1 Partnership would
not provide Investors with greater values than those they would receive in the
Exchange. Although Benton made various assumptions that it believes to be
reasonable in conducting the liquidation analysis supporting this conclusion,
there can be no assurance that those assumptions would ultimately prove to be
correct and that proceeds of a cash sale would not exceed the value of the
Common Stock and Warrants issuable in the Exchange.

         Benton's decision to recommend the approval of the Proposal is
supported by its internal liquidation analysis, reflecting a liquidation value
of $1,052,601 or $742 per 1990-1 Unit. It is further
    

                                       78
<PAGE>   92
   
supported by an independent offer to purchase the 1990-1 Partnership's interest
in the Umbrella Point Field by Goldking (which price represents 88.1% of the
total Proved Reserve estimates of the 1990-1 Partnership) for an estimated
total purchase price in cash of $930,865. This purchase price would represent
cash distributions to the Investors equal to $656 per 1990-1 Unit. Based on
these factors, Benton has concluded that, while an asset sale in liquidation
of the 1990-1 Partnership might result in limited third-party interest in the
1990-1 Partnership's most significant asset, a sale of the Partnership's
properties as a whole would provide an immediate cash return to Investors but
would likely result in valuations by an unaffiliated bidder below the total
Exchange Value, and further, any cash received would likely be equal to or
less than the liquidation value after payment of transaction costs and costs
associated with liquidation and dissolution. Benton has not conditioned this
Exchange Offer on approval by the other Partnerships described herein, but
believes that a third party would significantly discount the value of the
Partnership's properties if it could not purchase the working interests owned
by all three Partnerships. Additionally, Benton has assumed sole responsibility
for payment of all transaction costs associated with the Exchange Offer,
allowing distribution of consideration without deduction for such costs.
Benton believes it unlikely that a third party would offer to purchase the
Partnership's assets, and also assume responsibility for payment of transaction
costs.
    


                                       79

<PAGE>   93

                               1990-1 PARTNERSHIP

                              LIQUIDATION ANALYSIS

   
<TABLE>
<S>                                                                    <C>
Estimated Cash Proceeds from Sale of Umbrella Point Field..........    $930,865

Working Capital(1).................................................     201,736

General and Administrative Expense(2)..............................     (80,000)
                                                                     ----------

         Net Aggregate Liquidation Value...........................  $1,052,601
                                                                     ==========

         Liquidation Value Per Unit(3).............................  $      742
                                                                     ==========
</TABLE>
    

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

         (1)      At June 30, 1995, the 1990-1 Partnership had current assets,
                  less property held for sale, of $201,736 and liabilities of
                  $0, resulting in a working capital balance of $201,736,
                  excluding the property held for sale.
    

         (2)      Estimated expenses to the Partnership in preparing the
                  Partnership financial statements, tax returns, Investor tax
                  statements and similar administrative matters. This estimate
                  was determined based upon the actual expenses incurred by the
                  1990-1 Partnership for general and administrative expense for
                  the year ended December 31, 1994.

         (3)      Obtained by dividing the net aggregate liquidation value by
                  1,419.192 Partnership Units. No liquidation value has been
                  attributed to the Managing General Partners' interests.

         Benton's liquidation analysis did not take into account additional
discount factors that an unaffiliated buyer might apply to reflect the 1990-1
Partnership's concentration of production and value in one major property or its
lack of a majority working interest in its wells. In addition, Benton did not
attempt to quantify the potential impact of being able to secure a single buyer
for all of the 1990-1 Partnership's properties under the circumstances where the
only available purchaser limited its bid to the 1990-1 Partnership's most
significant property interest and excluded less desirable properties.

         Benton's liquidation analysis assumed that a Majority in Interest of
the Investors would approve the sale of all or substantially all of the 1990-1
Partnership's assets, as required under the 1990-1 Partnership Agreement. Based
on this analysis, the Managing General Partner concluded that Investors would
benefit more from the Exchange than a potential liquidation of the 1990-1
Partnership.

         The 1991-1 Partnership. If the 1991-1 Partnership liquidated its
assets and completed a dissolution upon the sale of its assets for cash, the
Investors would benefit by receiving an immediate cash return without continuing
to be subject to the risks of owning Benton Common Stock and Warrants and risks
of participation in oil and gas operations. In addition, if the 1991-1
Partnership were liquidated in a cash transaction, the Investors could reinvest
the proceeds in similar or different investments. For the reasons described
below, however, Benton believes that liquidating the 1991-1 Partnership would
not provide Investors with greater values than those they would receive in the
Exchange. Although Benton


                                       80

<PAGE>   94

made various assumptions that it believes to be reasonable in conducting the
liquidation analysis supporting this conclusion, there can be no assurance that
those assumptions would ultimately prove to be correct and that proceeds of a
cash sale would not exceed the value of the Common Stock and Warrants issuable
in the Exchange.

   
        Benton's decision to recommend the approval of the Proposal is supported
by its internal liquidation analysis, reflecting a liquidation value of $240,998
or $855 per 1991-1 Unit. It is further supported by an independent offer to
purchase the 1991-1 Partnership's interest in the Umbrella Point Field by
Goldking (which price represents 88.0% of the total Proved Reserve estimates of
the 1991-1 Partnership) for a total purchase price in cash of $185,282. This
purchase price would represent cash distributions to the Investors equal to $657
per 1991-1 Unit. Based on these factors, Benton has concluded that, while an
assets sale in liquidation of the 1991-1 Partnership might result in limited
third-party interest in the 1991-1 Partnership's most significant asset, a sale
of the Partnership's properties as a whole would provide an immediate cash
return to Investors but would likely result in valuations by an unaffiliated
bidder below the total Exchange Value, and further, any cash received would
likely be equal to or less than the liquidation value after payment of
transaction costs and costs associated with liquidation and dissolution. Benton
has not conditioned this Exchange Offer on approval by the other Partnerships
described herein, but believes that a third party would significantly discount
the value of the Partnership's properties if it could not purchase the working
interests owned by all three Partnerships. Additionally, Benton has assumed sole
responsibility for payment of all transaction costs associated with the Exchange
Offer, allowing distribution of consideration without deduction for such costs.
Benton believes it unlikely that a third party would offer to purchase the
Partnership's assets, and also assume responsibility for payment of transaction
costs.
    


                                       81

<PAGE>   95



                               1991-1 PARTNERSHIP

                              LIQUIDATION ANALYSIS

   
<TABLE>
<S>                                                                    <C>
Estimated Cash Proceeds from Sale of Umbrella Point Field...........   $185,282

Working Capital(1)..................................................     85,716

General and Administrative Expense(2)...............................    (30,000)
                                                                       --------

         Net Aggregate Liquidation Value............................   $240,998
                                                                       ========

         Liquidation Value Per Unit(3)..............................   $    855
                                                                       ========
</TABLE>
    

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

   
         (1)      At June 30, 1995, the 1991-1 Partnership had current assets,
                  less property held for sale, of $85,716 and liabilities of $0
                  resulting in a working capital balance of $85,716, excluding
                  the property held for sale.
    

         (2)      Estimated expenses to the Partnership in preparing the
                  Partnership financial statements, tax returns, Investor tax
                  statements and similar administrative matters. This estimate
                  was determined based upon the actual expenses incurred by the
                  1991-1 Partnership for general and administrative expense for
                  the year ended December 31, 1994.

         (3)      Obtained by dividing the net aggregate liquidation value by
                  281.8182 Partnership Units. No liquidation value has been
                  attributed to the Managing General Partners' interests.

         Material changes in Benton's liquidation analysis did not take into
account additional discount factors that an unaffiliated buyer might apply to
reflect the 1991-1 Partnership's concentration of production and value in one
major property or its lack of a majority working interest in its wells. In
addition, Benton did not attempt to quantify the potential impact of being able
to secure a single buyer for all of the 1991-1 Partnership's properties under
the circumstances where the only available purchaser limited its bid to the
1991-1 Partnership's most significant property interest and excluded less
desirable properties.

         Benton's liquidation analysis assumed that a Majority in Interest of
the Investors would approve the sale of all or substantially all of the 1991-1
Partnership's assets, as required under the 1991-1 Partnership Agreement. Based
on this analysis, the Managing General Partner concluded that Investors would
benefit more from the Exchange than a potential liquidation of the 1991-1
Partnership.

LACK OF INDEPENDENT REPRESENTATIVE

         Benton did not engage an independent representative to negotiate the
terms of the Exchange Offer on behalf of the Investors, since Benton believed
that the Exchange Values for each of the Partnerships is in excess of the fair
value of the assets of the Partnerships. In addition, Benton did not want to pay
fees to a third party to negotiate the terms of the Exchange. As a result, the
Exchange


                                       82

<PAGE>   96

Values and other term of the Exchange Offer may not be as favorable as the terms
that an independent representative might have obtained.

BOARD OF DIRECTORS OF BENTON; BENTON'S REASONS FOR THE EXCHANGE

         At a meeting held on April 26, 1995, the Board of Directors of Benton
unanimously approved the Exchange Offer and the issuance of Benton Common Stock
and Warrants in connection with the Exchange. The Delaware Corporation Law does
not require that the Benton stockholders approve the Exchange Offer or the
issuance of Benton Common Stock or Warrants, and no such approval is being
sought.

         In reaching its conclusion to approve the Exchange Offer, the Board of
Directors of Benton determined that the purchase of the Partnership assets by
Benton is consistent with and in furtherance of the long - term business
strategy of Benton. In addition, the Board believes that the Exchange Offer
provides the Investors in the Partnerships, many of whom are Benton
stockholders, the opportunity to benefit from the continued growth of Benton and
consideration in excess of the liquidation value of each of the Partnerships.
The Board understands the significant risks associated with the oil and gas
industry and drilling for oil and natural gas, but acknowledges the concerns
raised by the Investors in the Partnerships with regard to the disappointing
returns on investment by the Investors. Because many of the Investors are also
stockholders of Benton, the Board believes it prudent to maintain a good
relationship with these stockholders, who have been strong supporters of Benton
from inception, and the consideration to be given under the Exchange Offer is
indicative of Benton's desire to address the concerns of its Investors and
stockholders. The Board of Directors believes that the Exchange Offer may serve
to resolve the issues and claims made by certain Investors in the Litigation and
may forestall any further litigation surrounding or arising from the
Partnerships. In addition, the Board believes that dissolution of the
Partnerships upon consummation of the Exchange and adoption of the Proposals by
each of the Partnerships will allow Benton to focus its resources on the core
assets and projects of Benton.

FIDUCIARY DUTIES OF BENTON

         General. Benton's fiduciary duties to the Investors include legal
responsibilities of loyalty, care and good faith. As Managing General Partner of
the Partnerships, Benton may not profit by any conduct or transaction in
contravention of its fiduciary obligations to the Investors. Rights of action by
or on behalf of the Investors for any breach of these duties are provided under
most state limited partnership or other laws. Under California law, which is the
choice of law provided in the Partnership Agreements, a limited partner may
bring action against a general partner, upon a showing of the breach of its
fiduciary duty, to recover his capital contribution or to seek an accounting and
dissolution of the partnership. While a general partner would have the burden of
dispelling all doubts concerning its conduct, simple negligence or an error in
judgment not amounting to a breach of fiduciary duty would constitute a defense
to the limited partner's actions under California law. Benton believes that it
has complied with its fiduciary duties in the management of each of the
Partnerships and in connection with the Exchange Offer.

         Remedies for Breach of Fiduciary Duties. Under California law, except
as described below, if a non-consenting Investor believes that adoption of the
Proposal or consummation of the Exchange would constitute a breach of the
General Partner's fiduciary duties, the Investor could institute legal action
against the General Partner to enjoin the Exchange or implementation of the
Amendments contemplated by the Proposal or to recover damages resulting from the
consummation of the Exchange. In appropriate


                                       83

<PAGE>   97

circumstances, a limited partner may institute a class action against its
general partner on behalf of himself and the other similarly situated limited
partners or a derivative action against a general partner on behalf of the
partnership to recover damages for a breach of a general partner's fiduciary
duties. This is a developing area of the law, and Investors who have questions
concerning the General Partner's duties should consult with their own legal
counsel.

         Limitations on Investors' Remedies. The Partnership Agreements provide
that the General Partner and its affiliates will not be liable to the
Partnership or the Investors for errors of judgment or any acts or omissions
that do not constitute negligence or misconduct. In addition, the Partnership
Agreements provide generally that, to the extent permitted by law, the
Partnership will indemnify the General Partner and its affiliates providing
services on behalf of the Partnerships against judgments and amounts paid in
settlement, plus costs and expenses (including reasonable attorneys' fees and
expenses) actually and reasonably incurred, if the indemnitee acted in good
faith and in a manner reasonably believed to be in, or not opposed to, the best
interests of the Partnership. In the opinion of the SEC, indemnification for
liabilities arising under the Securities Act is against public policy and
therefore unenforceable.

ACCESS TO INVESTOR LIST AND PROGRAM RECORDS.

         Benton will provide free of charge to any Investor, upon written
request, a current alphabetized listing of all Investors' names and addresses of
the Investors in a Partnership in which the requesting Investor owns a
Partnership Unit. Investors are afforded this right under the Partnership
Agreement and federal and state law. Investors also have the right under the
Partnership Agreement to inspect the books and records of his Partnership at all
reasonable times.

                        FAILURE TO APPROVE THE PROPOSALS

         In the event that the Investors of any of the Partnerships fail to
approve the Proposal, as set forth in this Prospectus, the Exchange of
Partnership Units tendered pursuant to the Exchange offer will not be
consummated and the assets of that Partnership will not be transferred to
Benton. However, the assets of any Partnership whose Investors do approve the
Proposal and accept the Exchange will be transferred to Benton. In the event the
Investors of a Partnership fail to approve the Proposal, that Partnership would
continue in its business as heretofore operated. However, it is possible that a
new offer might be negotiated between such Partnership and Benton. No such other
terms have been discussed or agreed upon. In addition, the Managing General
Partner may also explore other alternatives, such as the sale of that
Partnership's assets to a third party. However, there is no assurance that the
Managing General Partner could find a third party interested in purchasing such
assets or that the terms and conditions of such a purchase and sale agreement
would be as favorable as the terms offered pursuant to the Exchange Offer.

         Pursuant to the terms of the purchase agreements with Goldking, the
seller or purchaser may terminate the agreement if the closing has not occurred
on or before December 31, 1995. If the Partnerships do not approve the
Proposals, there can be no assurance that a sale of the Partnerships' assets for
cash pursuant to the Goldking Agreement can be accomplished prior to such
termination date. The terms of each of the Partnership Agreements require that
such a sale be approved by the participants prior to consummation of such a
sale.


                                       84

<PAGE>   98

                               CONSENT PROCEDURES

WRITTEN CONSENT AND VOTE REQUIRED

         Investors may tender their Partnership Units or vote against the
Proposal by properly completing and executing the Letter(s) of Transmittal
accompanying this Prospectus and attached as Exhibit D in accordance with the
instructions contained therein, and delivering it, together with any requisite
supporting documents indicated in the Letter of Transmittal, prior to the
Expiration Date, to Benton at the following address:

                         Benton Oil and Gas Company
                         1145 Eugenia Place, Suite 200
                         Carpinteria, California 93013
                         Telephone: (805) 566-5600

         PARTNERSHIP UNITS WILL NOT BE VALIDLY TENDERED UNLESS THE LETTER OF
TRANSMITTAL HAS BEEN COMPLETELY AND FULLY EXECUTED IN ACCORDANCE WITH THE
INSTRUCTIONS THERETO AND ACCOMPANIED BY ALL OTHER REQUIRED DOCUMENTS IN FORM AND
SUBSTANCE SATISFACTORY TO BENTON. All questions concerning the validity, form
and eligibility (including time of receipt) of tenders will be determined by
Benton, whose determination will be final and binding.

CONSENT TABULATION

         All votes consenting to the Proposal and withholding consent, as
directed in the Letter of Transmittal submitted by Investors, will be tabulated
by First Interstate Bank. First Interstate Bank has agreed to make the
tabulation available to Investors upon request to Benton.

EXPIRATION OF EXCHANGE OFFER

         The Exchange Offer will be held open for 60 days from the date of this
Prospectus and will expire at 5:00 p.m. Pacific Time on the Expiration Date. The
Expiration Date will be ________, 1995, unless extended by Benton for a period
of up to 60 days. Notice of extension of the Exchange Offer, if made, will be
given by mail to each Investor. An extension will be effective upon mailing of
notice. 

AMOUNT TENDERED

         Benton will not accept tenders of less than all of an Investor's
Partnership Units.

REVOCABILITY OF TENDERS

         Tenders of Partnership Units and consents to the Proposal may be
revoked at any time prior to the Expiration Date by sending notice of revocation
to Benton at 1145 Eugenia Place, Suite 200, Carpinteria, California 93013,
Attention: Toni L. Jackson. The notice should identify the Investor, indicate
the Partnership Units for which he is revoking his tender and indicate an
intention to revoke a prior tender and withhold consent to the Proposal. If this
Prospectus is amended to reflect a material adverse development, the Expiration
Date will be extended, if required, to afford at least 20 days for Investors to
revoke their prior tender of Partnership Units.


                                     85

<PAGE>   99

SOLICITATION OF LETTERS OF TRANSMITTAL

   
         Benton intends to enter into an agreement with participating NASD
broker/dealers ("Solicitating Dealer") to assist in the solicitation of Letters
of Transmittal for the Exchange Offer. Each Solicitating Dealer who executes an
agreement with Benton will be entitled to receive a fee and expense
reimbursement from Benton equal to 2% of the aggregate Exchange Value of Units
held by Investors who return a completed Letter of Transmittal (whether they
vote for or against the Proposal) as a result of its solicitation effort (or an
aggregate for all Solicitating Dealers of up to $81,064), as evidenced by the
appearance of its name on the Letter of Transmittal in the space provided for
that purpose. Total fee and expense reimbursements to the Solicitating Dealers
will not exceed 2% of the Total Exchange Value.
    

         Benton has agreed to indemnity Solicitating Dealers against certain
civil liabilities, including liabilities under the Securities Act. The
Solicitating Dealers may be deemed to be underwriters within the meaning of the
Securities Act.

   
         Holders of Units in the Partnerships who elect to accept the Exchange
Offer may elect to receive cash in lieu of shares of Common Stock to be issued,
BUT CASH WILL BE DISTRIBUTED TO HOLDERS MAKING SUCH ELECTION ONLY IF THE SALE OF
THE UMBRELLA POINT FIELD TO GOLDKING, AS DESCRIBED HEREIN, IS ACTUALLY
CONSUMMATED. A holder who wishes to accept the Exchange Offer and make an
election to receive cash in lieu of shares of Common Stock should properly
indicate such election on the Letter of Transmittal. If the sale of the Umbrella
Point Field working interests to Goldking in consummated, a holder who elects to
receive cash in lieu of Common Stock will receive $1,185 for each 1989-1 Unit,
$891 for each 1990-1 Unit and $1,055 for each 1991-1 Unit, with Warrants in the
amounts described herein. There can be no assurance from Benton that the sale of
the Umbrella Point Field to Goldking will be consummated, and therefore, an
Investor should make a decision to accept the Exchange Offer based solely upon a
decision to receive Common Stock and Warrants in the amounts set forth herein.
    

ACCEPTANCE OF TENDERS

         On the Closing Date, subject to the satisfaction or waiver of the
conditions to the Exchange Offer, Benton will accept all Partnership Units
properly tendered pursuant to the Exchange Offer. If the Partnerships accept the
Proposals, Benton will, on behalf of the approving Partnerships, cause the
assets of such Partnerships, subject to associated liabilities, to be withdrawn
from the Partnership and contributed to Benton, effective as of the Effective
Date, in exchange for the Common Stock and Warrants which will be issued and
delivered promptly after the Closing Date.

         On the Closing Date, Benton will cause certificates representing the
Common Stock and the Warrants issuable in the Exchange to be registered in the
name of the holders who have accepted the Exchange Offer. Benton will also cause
a certificate representing the shares of Common Stock and Warrants that will be
issued to participants upon liquidation of each of the Partnerships to be issued
in the name of the Partnership, pending dissolution, liquidation and winding-up
of the Partnerships. Immediately thereafter, Benton will cause the shares of
Common Stock and Warrants issued in the name of the Partnership to be
transferred into certificates representing Common Stock and Warrants, registered
in the names of the individual participants remaining in the Partnerships
following liquidation.

SPECIAL REQUIREMENTS FOR CERTAIN INVESTORS

         Some of the Investors are entities such as estates, trusts,
corporations, limited partnerships or general partnerships. With respect to a
Partnership Unit tendered by an Investor other than an individual,


                                       86

<PAGE>   100

Benton may elect, at its option, to require that each Letter of Transmittal be
accompanied by evidence that the Investor has met all requirements of its
governing instruments, such as applicable partnership or joint venture
agreements, and is authorized to tender its Partnership Units under the laws of
the jurisdiction in which the entity was organized. With respect to most trusts,
including individual retirement accounts, Benton expects to require only that
the named trustee (or authorized representative thereof) execute the Letter of
Transmittal.

REPRESENTATIONS AND COVENANTS

         Each Investor represents in the Letter of Transmittal that he has, and
will have as of the Closing Date, the right and authority to transfer his
Partnership Unit, and that his Partnership Unit is free and clear of all liens,
encumbrances and adverse claims. The Letter of Transmittal also contains a
covenant by the Investor to execute any additional documents and instruments
that may be reasonably required to more effectively transfer to and to vest in
Benton the assets underlying the tendered Partnership Units and a power of
attorney to Benton to permit Benton, as Managing General Partner, to execute on
his behalf any additional documents necessary to consummate the Exchange,
including any documents on behalf of the Investors that may be necessary to
withdraw the assets of the Partnership and contribute those assets to Benton.

VALIDITY OF TENDERS

         All questions concerning the validity, form, eligibility (including
time of receipt) and acceptance of the Partnership Units tendered will be
determined by Benton, whose determination will be final and binding. The
interpretation by Benton of the terms and conditions of the Exchange Offer
(including the instructions to the Letter of Transmittal) will also be final and
binding. Benton reserves the right to waive any irregularities or conditions
regarding the manner of tender. Any irregularities in connection with such
tenders must be cured within such time as Benton determines unless waived by
Benton.

         Tenders will be deemed not to have been made until irregularities have
been cured or waived. Any Letter of Transmittal not properly completed and
executed will be returned by Benton to the tendering Investor as soon as
practicable unless the irregularities are cured or waived. Benton is under no
duty to give notification of defects in tenders, and will not incur liability
for failure to give such notification. Delivery of the Transmittal Letter is at
the risk of the Investor. A tender will be effective only when the Letter of
Transmittal is actually received by Benton. To ensure receipt of the Letter of
Transmittal and all other required documents, if any, when sent by the U.S.
Mail, Investors should use certified or registered mail, return receipt
requested.

PAYMENTS OF FEES AND EXPENSES

         Fees and expenses incurred in connection with the Exchange Offer will
be paid by Benton, whether or not the Proposals are accepted. Fees and expenses
incident to the Exchange Offer are estimated to be approximately $545,000, all
of which will be funded from Benton's working capital. The estimated fees and
expenses for the Exchange Offer are itemized below.


                                       87

<PAGE>   101

   
              <TABLE>
              <S>                                          <C>
              SEC registration fee ......................  $  3,133
              NASD filing fee ...........................     1,223
              NASDAQ-NMS listing fees ...................     5,000
              Soliciting Agent fees .....................    70,000
              Legal fees and expenses ...................   200,000
              Blue sky expenses .........................     5,000
              Printing costs ............................   175,000
              Engineering fees ..........................    10,000
              Accounting fees ...........................    50,000
              Miscellaneous .............................    25,644
                                                           --------

                                Total ...................  $545,000
                                                           ========
</TABLE>
    

COMPLIANCE WITH TENDER OFFER PRACTICES

         In conducting the Exchange Offer, Benton will comply with the
provisions of Rule 14e - 1 under the Exchange Act relating to the Solicitation
of tenders and the payment of consideration in a tender offer.


                                       88

<PAGE>   102

                        CERTAIN FEDERAL TAX CONSEQUENCES
   

         The following tax discussion summarizes certain federal income tax
consequences of the Exchange. This summary is based upon an opinion rendered to
Benton by Emens, Kegler, Brown, Hill & Ritter Co., L.P.A., counsel to Benton in
connection with the Exchange. A copy of such opinion has been filed as an
exhibit to the Registration Statement, and is available to an Investor upon
written request to Benton. It is intended to provide only a general summary and
does not include a complete analysis of the consequences that may vary with or
are contingent upon individual circumstances, such as a taxpayer who is subject
to special provisions of the Internal Revenue Code. This discussion does not
address the federal income tax treatment of other transactions related to the
Exchange, any aspect of state, local or foreign tax laws, or any federal laws
other than those pertaining to income tax.
    

         None of the parties have requested a ruling from the Internal Revenue
Service with respect to the federal income tax consequences of the Exchange. No
assurance can be given that future legislation, regulations, administrative
pronouncements or court decisions will not significantly change the law and
materially affect the conclusions expressed herein. Any such change, even though
made after the consummation of the Exchange, could be applied retroactively.

   
MATERIAL TAX CONSEQUENCES OF THE EXCHANGE
    

   
        Upon the exchange of the Partnership Units for Common Stock and
Warrants, Investors shall recognize gain equal to the amount by which the fair
market value of the Common Stock and Warrants received by them exceeds their
respective bases in the Partnership Units exchanged therefor. Similarly, those
Investors who do not participate in the Exchange, but rather receive Common
Stock and Warrants upon liquidation of the Partnerships, should be deemed to
have transferred their Partnership Units for Common Stock and Warrants.
Therefore, an Investor will recognize gain and be liable for taxes although the
Investor will not receive cash (except for Investors who may elect the cash
option) and will thus be required to sell the Common Stock or otherwise secure
cash to pay the taxes.
    

         It is possible that the Internal Revenue Service may argue that the
transaction constitutes a transfer of assets of the Partnership to Benton for
Common Stock and Warrants with the Common Stock and Warrants then distributed to
the Investors in liquidation of their interests in the Partnerships. Under such
a characterization of the transactions, the Partnerships would recognize gain on
the disposition of the assets which would be allocated to the Investors. Such a
characterization could affect the amount of gain recognized by the Investor.
However, courts evaluating the transfer of all of the assets of a partnership
followed by a termination of the business of the partnership have generally held
that such transactions will be characterized as a transfer of partnership
interests in exchange for the assets received rather than a transfer by the
partnership of assets and subsequent liquidation. Therefore, the treatment
afforded Investors not consenting to the Exchange should not differ from the tax
treatment realized by Investors who agree to exchange their Partnership Units
for Common Stock and Warrants.

         Assuming the Investor has held his Interest for more than one year and
assuming his Interest has not been held for sale in the ordinary course of the
Investor's trade or business, any gain or loss realized upon the transfer of the
Partnership Units will be taxed as long term capital gain or loss, except to the
extent that the consideration received is attributable to his allocable share of
substantially appreciated inventory items and unrealized receivables (including
depreciation recapture and excess intangible drilling and development costs) of
the Partnerships. The portion of any gain attributable to these items will be
taxed to the Investor as ordinary income. In addition, in the event of a
recharacterization of the transaction as a transfer of assets, additional
ordinary income could be recognized by the Partnerships which would be allocable
to Investors.


                                       89

<PAGE>   103

REALIZATION OF SUSPENDED PASSIVE LOSSES

         Upon disposition of the Partnership Units, the Investors will have
completely disposed of their Interest in the Partnerships. Any Investor who has
any suspended passive losses resulting from the ownership of Partnership Units
will realize those suspended passive losses upon consummation of the Exchange.

BASIS IN STOCK AND WARRANTS

         Upon consummation of the Exchange, the basis of the Investors in the
Common Stock and Warrants received by them shall be equal to the fair market
value of such securities as of the date of consummation of the Exchange.

         THE PRECEDING DISCUSSION IS INTENDED ONLY AS A SUMMARY OF CERTAIN
FEDERAL INCOME TAX CONSEQUENCES OF THE EXCHANGE AND DOES NOT PURPORT TO BE A
COMPLETE ANALYSIS OR DISCUSSION OF ALL POTENTIAL TAX EFFECTS RELEVANT THERETO.
THUS, INVESTORS ARE URGED TO CONSULT THEIR OWN TAX ADVISORS AS TO THE SPECIFIC
TAX CONSEQUENCES TO THEM OF THE EXCHANGE, INCLUDING TAX RETURN REPORTING
REQUIREMENTS, THE APPLICABILITY AND EFFECT OF FEDERAL, STATE, LOCAL AND OTHER
APPLICABLE TAX LAWS AND THE EFFECT OF ANY PROPOSED CHANGES IN THE TAX LAWS.


                                       90

<PAGE>   104

                     COMPARATIVE RIGHTS OF SECURITY HOLDERS

         The following comparative information is an accurate summary of the
material differences associated with rights of a holder of Units in the
Partnerships versus stockholders in Benton. The rights and duties of Unitholders
summarized below are the same for each of the Partnerships, except as otherwise
noted.

   
<TABLE>
<CAPTION>
               PARTNERSHIPS                                         BENTON OIL AND GAS COMPANY

                                       Distributions and Dividends

<S>                                                        <C>
Each of the Partnership Agreements provides                Although holders of Common Stock are entitled
for cash distributions in the discretion of                to receive any dividends declared thereon by
the Managing General Partner in an amount                  Benton's Board of Directors out of legally
equal to approximately the difference between              available funds, no dividends are expected to
revenues allocated to the respective partners              be paid on the Common Stock for the
and costs charged to the partners. The                     foreseeable future.  Under Delaware law,
Partnership Agreement states that the                      dividends may be paid out of the Company's
provisions do not serve as a limitation on                 surplus or out of its net profits for the
the right of the Managing General Partner to               fiscal year in which the dividend is declared
retain, pledge or use so much of the revenues              and/or the preceding fiscal year.  In
or other assets of the Partnerships to                     addition, the Company's credit agreements
conduct additional operations, establish                   restrict the Company's ability to pay cash
reserves for anticipated expenditures or                   dividends.
repay any amounts borrowed by the
Partnerships to finance the conduct of such
operations.

                                               Tax Matters

None of the Partnerships are subject to                    The Company is subject to federal income tax
federal or state income taxes. Each partner                on its consolidated income after allowable
is allocated his pro rata share of the                     deductions and credits. Stockholders will not
Partnership's taxable income.                              be taxed on the Company's income but will
                                                           generally be subject to federal and state
                                                           income taxes on dividends received from the
                                                           Company, if any.
</TABLE>
    

                                       91

<PAGE>   105

   
<TABLE>
<CAPTION>

                                              Voting Rights

<S>                                                        <C>
Holders of Units in the Partnerships are                   Stockholders of Benton are entitled to one
entitled to one vote per Unit on matters                   vote per share on all matters submitted to
submitted to them for a vote, on any sale of               them for a vote, including the election and
all or substantially all of the assets,                    removal of directors, amendments to the
dissolution of the Partnership and removal of              Certificate of Incorporation, certain mergers
the Managing General Partner. Each of these                and share exchanges, dissolution and the sale
matters requires the consent of a majority of              of all or substantially all of the assets of
the outstanding Units.                                     the Company. These matters require the
                                                           approval of a majority of the outstanding
                                                           Common Stock. Accordingly, the holders of
                                                           Units will not receive a security with
                                                           significantly different voting rights, other
                                                           than eliminating the right to compel
                                                           dissolution and adding the right to
                                                           participate in annual elections of directors.
                                                           However, former holders of Units will own a
                                                           smaller percentage interest in the Company
                                                           than they currently own in the respective
                                                           Partnerships, resulting in a corresponding
                                                           decrease in their voting power.

                                          Right to Call Meetings

Meetings of the participants of the                        Special meetings of the Company's
Partnerships may be called by the Managing                 stockholders may be called by the President,
General Partner or by holders of at least 10%              Board of Directors or by holders of not less
of the outstanding Units. Actions requiring a              than 10% of the Common Stock. Actions
vote of the holders of Units may be taken                  requiring a vote may be taken without a
without a meeting upon written consent by the              meeting upon written consent by the same
same percentage of Unitholders required to                 percentage of stockholders required to
approve the action at a meeting.                           approve the action at a meeting.

                                          Right to Investor List

Under California law, a holder of Units has                The Company is required to maintain a list of
the right to examine or copy a listing of the              the names and addresses of all stockholders
names and addresses and record ownership                   at its principal office during normal business
positions of the holders of Units.                         hours for any proper purpose and, in certain
                                                           circumstances, to provide a copy of the list
                                                           to any stockholder upon request.
</TABLE>
    

                                       92

<PAGE>   106

<TABLE>
<CAPTION>

                                    Assessments and Limited Liability

<S>                                                        <C>
Under the terms of the Partnership Agreements,             The Company's stockholders will not be
Unitholders are not subject to additional                  subject to assessments or to personal
assessments. The liability of the Unitholders              liability for obligations of the Company.
is generally limited to their capital
contributions and, in certain circumstances,
the amount of any capital distributed or
returned to them.
                                         Allocations and Dilution

Under the terms of the Partnership Agreements,             The Company's Certificate of Incorporation
the participants pay 99% of the lease                      authorizes the issuance of up to 40,000,000
acquisition, geophysical and seismic costs,                shares of Common Stock and 5,000,000 shares
well costs, general and administrative                     of Preferred Stock, including shares that may
expenses and organization and offering                     be divided into one or more additional series
expenses, including commissions, while the                 with rights and preferences to be determined
co-managing general partners pay 1% of such                by the Company's Board of Directors without
costs.                                                     any stockholder action.  An Investor's
                                                           percentage interest in the Company is subject
                                                           to dilution upon issuance of additional
                                                           securities by the Company.
Under the terms of the 1989-1 Partnership
Agreement, Revenues, production taxes and
lease operating expenses on proven producing
wells are allocated 99% to the participants
and 1% to the co-managing general partners.
Revenues, production taxes and lease
operating expenses on recompleted wells are
allocated 74.25% to the participants and
25.75% to the co-managing general partners.
On new wells drilled, revenues, production
taxes and lease operating expenses are
allocated 64.35% to the participants and
35.65% to the co-managing general partners.

Under the terms of the 1990-1 Partnership
Agreement, general and administrative
expenses and lease operating expenses are
shared 74.25% by the participants and 25.75%
by the co-managing general partners. Revenues
and production taxes are allocated
</TABLE>


                                       93

<PAGE>   107

   
<TABLE>
<CAPTION>

<S>                                                        <C>
73.5974% to the participants, 25.5236% to the
co-managing general partners, and .879% to
broker/dealers (special limited partners) who
met certain minimum sales requirements in the
initial offering in the 1990-1 Units.

Under the terms of the 1991-1 Partnership
Agreement, for the first 12 months of the
Partnership, general and administrative
expenses were covered by a fee, equal to 3%
of the initial capital raised, paid by the
1991-1 Partnership to Benton. The fee was
payable 99% by the participants and 1% by the
co-managing general partners. General and
administrative expenses after the first 12
months and lease operating expenses are
shared 74.25% by the participants and 25.75%
by the co-managing general partners. Revenues
and production taxes are allocated 73.944% to
the participants, 25.6438% to the co-managing
general partners and .4122% to broker/dealers
(special limited partners) who met certain
minimum sales requirements in the initial
offering of the 1991-1 Units.

Allocations outlined above are made to
Unitholders in proportion to the number of
Units owned.

                                                Liquidity

There is no trading market for the Units.                  The Company's Common Stock is traded on the
                                                           NASDAQ-NMS and the shares issued pursuant
                                                           to this Exchange Offer will be freely
                                                           tradable by non-affiliates of the Company.
                                                           There is no trading market for the Warrants.


                                        Redemption and Conversion

The Units are not redeemable or convertible                The Common Stock is not redeemable or
into other securities.                                     convertible.  The Warrants can be exercised
                                                           for Common Stock upon payment of the exercise
                                                           price ($11.00

</TABLE>
    


                                       94

<PAGE>   108

   
<TABLE>

<S>                                                        <C>
                                                           per share) prior to expiration of the Warrant.

                                           Financial Reporting

The Unitholders are entitled to receive                    The Company is subject to the reporting
audited annual financial statements and                    requirements of the Exchange Act and files
reserve reports for the Partnerships.                      periodic reports as well as proxy statements
                                                           with the SEC, copies of which are provided or
                                                           are available to its stockholders.

                                            Operating Strategy

The Partnerships were formed to invest in oil              Benton is primarily engaged in the
and natural gas activities by acquiring proven             development and production of oil and gas
producing properties that have additional                  properties.  Benton's operations are focused
development potential, recompleting previously             on the Eastern Region of Venezuela, the Gulf
drilled wells and drilling new wells.  The                 Coast Region of Louisiana and the West
Partnerships' properties are all located in a              Siberia Region of Russia.  Benton's business
small number of fields within the United                   strategy is to seek new reserves in areas of
States.  Although each of the Partnership                  low geologic risk and to exploit
Agreements permits the Managing General                    underdeveloped existing oil and gas fields.
Partners to borrow money on behalf of such                 Benton implements the exploitation strategy
Partnership, Benton's policy as Managing                   through the in-house design and
General Partner has been to refrain from                   interpretation of 3-D seismic surveys and
financing oil and gas activities through                   through workovers, recompletions, redrilling
credit.                                                    and exploration and development drilling.
                                                           Benton has, and will continue to, finance a
                                                           portion of its oil and gas activities through
                                                           issuance of debt instruments or under credit
                                                           arrangements.

                                       Management and Compensation

Benton and a wholly owned subsidiary, Benton               The stockholders of Benton Oil and Gas
Oil and Gas Company of Louisiana, are the                  Company elect directors annually and the
Co-Managing General Partners of each of the                directors elect officers of the Company to
Partnerships.  Benton makes all decisions                  serve at the discretion of the Board.
regarding the business and operations of the               Officer salaries and incentive compensation
Partnerships, including production,                        are determined annually by the Board of
development and other activities, and any sale             Directors and/or the President of Benton.
of properties and the acquisition of
additional properties.  The Co-Managing
General Partners do not receive any management
fees or other
</TABLE>
    


                                       95

<PAGE>   109
   
<TABLE>

<S>                                                        <C>
fees from any of the Partnerships.  The
Partnerships pay the Co-Managing General
Partners for lease operating expenses, well
costs and general and administrative expenses
incurred by them on behalf of the
Partnerships.  Benton receives allocations of
profits and losses.  See "--Allocation and
Dilution," above.

                                             Fiduciary Duties

The Co-Managing General Partners fiduciary                 The fiduciary duties owed by the directors of
duties to the Unitholders include legal                    Benton to its stockholders under the Delaware
responsibilities of loyalty, care and good                 General Corporation law and remedies available
faith. Benton may not profit from drilling in              for a breach of those responsibilities are
contravention of its fiduciary obligation to               similar to those applicable to the Partnerships
the Partners.                                              and the Unitholders.  Therefore, the Exchange
                                                           generally will not involve any reduction in
                                                           the standard of care owed to Investors or in
                                                           the remedies available for any breach of those
                                                           duties. Moreover, the elimination of the dual
                                                           rule of the Board of Directors as the
                                                           governing body of Benton with its obligations
                                                           to stockholders of Benton as well as
                                                           obligations and duties owed to Unitholders by
                                                           Benton, as Managing General Partner, should
                                                           remove most of the conflicts of interest
                                                           inherent in the current structure.

                                     Limits on Management's Liability

The Partnership Agreements provide that in any             Benton's Certificate of Incorporation and
threatened, pending or completed action, suit              Bylaws provide for the elimination of
or proceeding to which the Co-Managing General             directors' liability for monetary damages
Partners were or are a party or are threatened             arising from a breach of certain fiduciary
to be made a party by reason of the fact that              obligations and for the indemnification of
they were or are a Co-Managing General Partner             directors, officers and agents to the full
of the Partnership involving any alleged cause             extent permitted by the Delaware General
of action for damages arising from the                     Corporation Law.  These provisions generally
performance of oil and gas activities,                     provide for indemnification in the absence of
including exploration, development,                        gross negligence or willful misconduct and
completion, operation, or other activities                 cannot be amended without the affirmative
relative to management and disposition of oil              vote of a majority of the outstanding shares
and gas properties or production                           of Common Stock.
</TABLE>
    

                                       96

<PAGE>   110
   
<TABLE>

<S>                                                  <C>
from such properties, the Partnership will
indemnify the Co-Managing General Partners
against expenses actually and reasonably
incurred by them in connection with such
action, suit or proceeding if they acted in
good faith and in a manner they reasonably
believed to be in or not opposed to the best
interests of the Partnership, and provided
that their conduct does not constitute
negligence, misconduct, or a breach of their
fiduciary obligations to the Unitholders.

The Unitholders under the Agreement are each
solely and individually responsible only for
their pro rata share of the liabilities and
obligations of the Partnership, and any
Unitholder who incurs liability in excess of
his pro rata share shall be entitled to
contribution from the other Unitholders. Each
Co-Managing General Partner agrees to
indemnify each Unitholder from paying any
liabilities or obligations of the Partnership
in excess of such Unitholders capital
contribution.

                                        Continuation of Existence

The Partnership Agreement for the 1989-1                   The Company has a perpetual term, subject to
Partnership, the 1990-1 Partnership and the                dissolution upon the occurrence of specified
1991-1 Partnership provides for a term ending              events.
on December 31, 2039, December 31, 2039 and
December 31, 2040, respectively, or until an
earlier dissolution upon specified events, but
contemplates continuing operations in
accordance with its objectives.

                                         Anti-Takeover Provisions

There are no anti - takeover provisions in the             Benton is subject to the anti-takeover
Partnership Agreements or under California                 protections of the Delaware General
Partnership law.                                           Corporation Law, which prohibit business
                                                           combinations with interested stockholders
                                                           under certain circumstances. In addition,
                                                           Benton has adopted a shareholder rights plan,
                                                           or
</TABLE>
    


                                       97

<PAGE>   111

<TABLE>

<S>                                                        <C>
                                                           poison pill, which could have the effect if
                                                           delaying or impeding an unfriendly takeover of
                                                           the Company.

                                                Liquidation Rights

In the event of liquidation, the partners are              In the event of liquidation, holders of
entitled to a distribution in proportion to                Common Stock would be entitled to share
their positive capital account balances after              ratably in any assets of the Company
the creditors, including Partners, who are                 remaining after satisfaction of obligations
creditors (to the extent permitted by law),                to its creditors and liquidation preferences
have been paid.  If the liabilities of the                 on any series of Preferred Stock of the
partnership exceed the assets upon                         Company then outstanding.  The Company
liquidation, or otherwise if any General                   currently has no shares of Preferred Stock
Partner then has a negative balance in its                 outstanding and has no plans to issue any
capital account, the General Partners must                 shares of Preferred Stock in the foreseeable
contribute funds to the Partnership in the                 future.
ratio of their negative capital accounts
until the negative capital accounts are
eliminated.

                                       Right to Compel Dissolution

The Partnership may be dissolved by the                    Under Delaware law, stockholders of the
written vote or consent by Participants                    Company may not vote to compel dissolution of
representing a majority of the outstanding                 the Company without prior action by its Board
units.                                                     of Directors.
</TABLE>


                                       98
<PAGE>   112

                    UNAUDITED PRO FORMA FINANCIAL INFORMATION

   
The following unaudited pro forma combined information reflects the combination
of Benton and the Partnerships, including pro forma adjustments to account for
the Exchange Offer. The minimum pro forma amounts reflect the acquisition of the
1991-1 Partnership and the maximum pro forma amounts reflect the acquisition of
all the Partnerships. The pro forma balance sheet at June 30, 1995 is prepared
assuming the acquisition of the Partnerships occurred on June 30, 1995. The pro
forma statements of operations and cash flows for the year ended December 31,
1994 and the six months ended June 30, 1995 are prepared assuming the
acquisition of the Partnerships occurred on January 1, 1994. The pro forma
statements assume the Limited Partners accept common stock, rather than cash, in
exchange for their partnership units. The unaudited pro forma combined financial
information below should be read in conjunction with the financial statements of
Benton and the Partnerships and the related notes thereto included elsewhere in
the Prospectus.
    


                                       99

<PAGE>   113

   

                      PRO FORMA CONSOLIDATED BALANCE SHEET
                                  JUNE 30, 1995
    

   
<TABLE>
<CAPTION>
                                    Consolidated    Minimum Pro                             Remaining
                                   Benton Oil and      Forma                 Minimum        Pro Forma                Maximum
                                     Gas Company    Adjustments   Notes     Pro Forma      Adjustments   Notes      Pro Forma
                                   --------------------------------------------------------------------------------------------
<S>                                <C>              <C>           <C>     <C>              <C>           <C>       <C>
ASSETS:

Current Assets:
 Cash and cash equivalents          $ 25,416,122     $  82,547     (a)    $ 24,953,669     $   151,172    (d)      $ 25,104,841
                                                      (545,000)    (g)
 Restricted cash                      19,550,000                            19,550,000                               19,550,000
 Accounts receivable:
  Accrued oil and gas revenue         11,412,303                            11,412,303                               11,412,303
  Joint interest and other             3,745,439                             3,745,439                                3,745,439
 Property held for sale                  756,872       185,282     (a)         942,154       1,254,161    (d)         2,196,315
 Prepaid expense & other               1,903,825                             1,903,825                                1,903,825
                                    ------------     ---------            ------------     -----------             ------------
    Total Current Assets              62,784,561      (277,171)             62,507,390       1,405,333               63,912,723
Other Assets                           1,438,315                             1,438,315                                1,438,315
Property and Equipment, net          125,986,352        49,243     (a)     126,009,846         133,573    (d)       126,143,798
                                                       (25,749)    (b)                             379    (e)
                                    ------------     ---------            ------------     -----------             ------------
      Total Assets                  $190,209,228     ($253,677)           $189,955,551     $ 1,539,285             $191,494,836
                                    ============     =========            ============     ===========             ============

LIABILITIES:
Current Liabilities:

 Accounts payable:

  Revenue distribution              $    866,461                              $866,461                             $    866,461
  Trade and other                      9,591,452        (3,169)    (a)       9,588,283         (56,902)   (d)         9,531,381
 Accrued interest payable,
  payroll and related taxes            1,173,599                             1,173,599                                1,173,599
 Income taxes payable                  1,586,616                             1,586,616                                1,586,616
 Short term borrowings                21,534,318                            21,534,318                               21,534,318
 Current portion of long term
  debt                                 5,893,160                             5,893,160                                5,893,160
                                    ------------     ---------            ------------     -----------             ------------
      Total Current Liabilities       40,645,606        (3,169)             40,642,437         (56,902)              40,585,535

Long Term Debt                        53,268,253                            53,268,253                               53,268,253

Minority Interest                      3,486,233                             3,486,233                                3,486,233

STOCKHOLDERS' EQUITY:

Common stock                             251,054           268     (c)         251,322           1,451    (f)           252,773
Additional paid-in-capital            94,317,797       689,164     (c)      94,461,961       3,356,033    (f)        97,817,994
                                                      (545,000)    (g)
Accumulated Deficit                  (1,759,715)      (394,940)    (h)      (2,154,655)     (1,761,297)   (h)        (3,915,952)
                                    -----------      ---------            ------------     -----------             ------------
   Total Stockholders'

   Equity                             92,809,136      (250,508)             92,558,628       1,596,187               94,154,815
                                    ------------     ---------            ------------     -----------             ------------
      Total Liabilities and
       Stockholders' Equity         $190,209,228     ($253,677)           $189,955,551     $ 1,539,285             $191,494,836
                                    ============     =========            ============     ===========             ============

Book value per share                       $3.70                                 $3.68                                    $3.72
                                           =====                                 =====                                    =====
Common shares outstanding             25,105,493                            25,132,265                               25,277,373
                                      ==========                            ==========                               ==========
</TABLE>
    
   
Notes:       (a) Combine assets of the 1991-1 Partnership, net of intercompany
                 receivables and payables.
             (b) Record purchase of 1991-1 Partnership properties.
             (c) Record issuance of 26,772 shares and 108,500 warrants to the
                 participants in the acquisition of the 1991-1 Partnership at
                 the average market value of the 20 days ended September 11,
                 1995 of $11.00 per share and $3.64 per warrant.
             (d) Combine assets of the 1989-1 Partnership and 1990-1
                 Partnership, net of intercompany receivables and payables.
             (e) Record purchase of 1989-1 Partnership and 1990-1 Partnership
                 properties.
    


                                      100

<PAGE>   114
   

             (f) Record issuance of 145,108 shares and 483,873 warrants to the
                 participants in the acquisition of the 1989-1 Partnership and
                 the 1990-1 Partnership at the average market value for the 20
                 days ended September 11, 1995 of $11.00 per share and $3.64 per
                 warrant.
             (g) Record payment of stock issuance fees and distribution
                 expenses.
             (h) Record roll-up expenses associated with acquiring the
                 Partnership units.
    

   
The participants are given the option of accepting cash or shares of the
Company's common stock in exchange for their partnership units. The pro forma
balance sheet above assumes that the participants accept stock in exchange for
their partnership units. If all the participants accept cash rather than shares,
cash would be reduced to $24,656,259 and $23,207,902 for the minimum and maximum
pro forma balance sheets, respectively. Common shares outstanding would be
reduced to 25,105,493, common stock would be reduced to $251,054 and additional
paid in capital would be reduced to $94,167,737 and $95,929,033 in the minimum
and maximum pro forma balance sheets, respectively.
    


                                      101

<PAGE>   115

   

                 PRO FORMA CONSOLIDATED STATEMENT OF OPERATIONS
                     FOR THE SIX MONTHS ENDED JUNE 30, 1995
    

   
<TABLE>
<CAPTION>
                                 Consolidated    Minimum Pro                          Remaining
                                Benton Oil and      Forma                Minimum      Pro Forma              Maximum
                                  Gas Company    Adjustments   Notes    Pro Forma    Adjustments   Notes    Pro Forma
                                --------------------------------------------------------------------------------------
<S>                             <C>              <C>           <C>     <C>           <C>           <C>     <C>
REVENUES:

 Oil and gas sales               $24,829,260       $ 33,219     (a)    $24,862,479    $ 242,212     (b)    $25,104,691
 Gain on exchange rates              118,786                               118,786                             118,786
 Investment earnings                 873,521            577     (a)        874,098          633     (b)        874,731
 Partnership fees,
  reimbursements and other            48,829         (5,412)    (c)         43,417      (28,414)    (c)         15,003
                                 -----------       --------            -----------    ---------            -----------
                                  25,870,396         28,384             25,898,780      214,431             26,113,211
                                 -----------       --------            -----------    ---------            -----------
EXPENSES:

 Lease operating costs and
  production taxes                 5,287,071          9,684     (a)      5,296,755      102,700     (b)      5,399,455
 Depletion, depreciation, and
  amortization                     6,473,402         20,849     (d)      6,494,251      157,869     (d)      6,652,120
 General and administrative        3,883,606         22,404     (a)      3,900,598       79,574     (b)      3,951,758
                                                     (5,412)    (c)                     (28,414)    (c)
Interest                           3,361,041                             3,361,041                           3,361,041
 Minority Interest in net
  income                           1,742,573                             1,742,573                           1,742,573
                                  20,747,693         47,525             20,795,218      311,729             21,106,947
Income before income taxes
  and roll-up expenses and
  payments                         5,122,703        (19,141)             5,103,562      (97,298)             5,006,264
Income taxes                       1,971,102                             1,971,102                           1,971,102
                                 -----------       --------            -----------    ---------            -----------
Income before roll-up
  expenses and payments            3,151,601        (19,141)             3,132,460      (97,298)             3,035,162
Roll-up expenses and payments
                                 -----------       --------            -----------    ---------            -----------
Income (loss) after roll-up
  expenses                       $ 3,151,601       ($19,141)           $ 3,132,460     ($97,298)           $ 3,035,162
                                 ===========       ========            ===========    =========            ===========

Income per common share:
 Before roll-up expenses and
  payments                             $0.12                                 $0.12                               $0.11
                                       -----                                 -----                               -----
 After roll-up expenses and
  payments                             $0.12                                 $0.12                               $0.11
                                       -----                                 -----                               -----

Weighted average common
  shares outstanding              26,459,123                            26,485,895                          26,631,003
                                  ==========                            ==========                          ==========

Ratio of earnings to fixed
  charges:
  Before roll-up expenses and
    payments                           2.51x                                 2.50x                               2.47x
                                       -----                                 -----                               -----
  After roll-up expenses and
  payments                             2.51x                                 2.50x                               2.47x
                                       -----                                 -----                               -----
</TABLE>
    

   
Notes:       (a) Record the participants' share of the 1991-1 Partnership.
             (b) Record the participants' share of the 1989-1 Partnership and
                 1990-1 Partnership.
             (c) Eliminate allocated overhead costs from partnerships.
             (d) Record depletion on oil and gas properties acquired from
                 partnerships.
    

   
The participants are given the option of accepting either cash or shares of the
Company's common stock in exchange for their partnership units. The pro-forma
statements of operations above assume that the participants accept stock in
exchange for their partnership units. If all the participants accept cash rather
than shares, the weighted average number of shares would be 26,459,123 for both
the minimum and maximum pro-forma statements of operations.
    


                                      102

<PAGE>   116

   

                 PRO FORMA CONSOLIDATED STATEMENT OF CASH FLOWS
                     FOR THE SIX MONTHS ENDED JUNE 30, 1995
    

   
<TABLE>
<CAPTION>
                                                         Consolidated        Minimum
                                                        Benton Oil and      Pro Forma                   Minimum
                                                         Gas Company       Adjustments     Notes       Pro Forma
                                                        ----------------------------------------------------------
<S>                                                     <C>                <C>             <C>       <C>
CASH FLOWS FROM
OPERATING ACTIVITIES:
Net Income (loss)                                        $  3,151,601       $ (19,141)       (a)      $  3,132,460
Adjustments to reconcile net income (loss) to net
   cash provided by (used in) operating activities:
   Depletion, depreciation and amortization:                6,473,402          20,849        (a)         6,494,251
   Net earnings from limited partnerships                     (20,435)           (270)       (c)           (20,705)
   Amortization of financing costs                             90,640                                       90,640
   Loss on disposal of assets                                  10,632                                       10,632
   Minority interest in undistributed
       earnings of subsidiary                               1,742,573                                    1,742,573
   (Increase) decrease in accounts receivable              (1,919,152)                                  (1,919,152)
   (Increase) decrease in prepaid expenses
       and other                                           (1,339,986)                                  (1,339,986)
   Increase in accounts payable                            (1,562,974)          4,728        (a)        (1,558,246)
   Increase (decrease) in accrued Interest
       payable, payroll and related taxes                     (25,497)                                     (25,497)
   Increase in income taxes payable                         1,586,616                                    1,586,616
                                                         ------------       ---------                 ------------
       TOTAL ADJUSTMENTS                                    5,035,819          25,307                    5,061,126
                                                         ------------       ---------                 ------------
       NET CASH PROVIDED BY (USED IN)
       OPERATING ACTIVITIES                                 8,187,420           6,166                    8,193,586
                                                         ------------       ---------                 ------------
 CASH FLOWS FROM INVESTING ACTIVITIES:
   Proceeds from sale of property and equipment            14,708,863          29,200        (a)        14,738,063
   Additions of property and equipment                    (27,130,397)        (12,989)       (a)       (27,143,386)
                                                         ------------       ---------                 ------------
       NET CASH PROVIDED BY (USED IN)
       INVESTING ACTIVITIES                               (12,421,534)         16,211                  (12,405,323)
                                                         -------------      ---------                 ------------

CASH FLOWS FROM FINANCING ACTIVITIES:
   Proceeds from exercise of stock options and
       warrants                                               611,738                                      611,738
   Proceeds from issuance of notes payable                 22,040,000                                   22,040,000
   Payments on commercial paper, other short
       term borrowings and notes payable                   (6,980,406)                                  (6,980,406)
   Increase in other assets                                  (213,664)                                    (213,664)
                                                         ------------       ---------                 ------------
     NET CASH PROVIDED BY (USED IN)
     FINANCING ACTIVITIES                                  15,457,668                                   15,457,668
                                                         ------------       ---------                 ------------
     NET DECREASE IN CASH                                  11,223,554          22,377                   11,245,931
CASH AND CASH EQUIVALENTS AT
BEGINNING OF PERIOD                                        14,192,568        (484,830)                  13,707,738
                                                         ------------       ---------                 ------------
CASH AND CASH EQUIVALENTS AT END
OF PERIOD                                                $ 25,416,122       ($462,453)                 $24,953,669
</TABLE>
    

   
<TABLE>
<CAPTION>
                                                           Remaining
                                                           Pro Forma                  Maximum
                                                          Adjustments     Notes      Pro Forma
                                                          --------------------------------------
<S>                                                       <C>             <C>       <C>
CASH FLOWS FROM
OPERATING ACTIVITIES:
Net Income (loss)                                            ($97,298)      (b)     $  3,035,162
Adjustments to reconcile net income (loss) to net
   cash provided by (used in) operating activities:
   Depletion, depreciation and amortization:                  157,869       (b)        6,652,120
   Net earnings from limited partnerships                      20,705       (c)
   Amortization of financing costs                                                        90,640
   Loss on disposal of assets                                                             10,632
   Minority interest in undistributed
       earnings of subsidiary                                                          1,742,573
   (Increase) decrease in accounts receivable                                         (1,919,152)
   (Increase) decrease in prepaid expenses
       and other                                                                      (1,339,986)
   Increase in accounts payable                               (22,301)      (b)       (1,580,547)
   Increase (decrease) in accrued Interest
       payable, payroll and related taxes                                                (25,497)
   Increase in income taxes payable                                                    1,586,616
                                                            ---------               ------------
       TOTAL ADJUSTMENTS                                      156,273                  5,217,399
                                                            ---------               ------------
       NET CASH PROVIDED BY (USED IN)
       OPERATING ACTIVITIES                                    58,975                  8,252,561
                                                            ---------               ------------
 CASH FLOWS FROM INVESTING ACTIVITIES:
   Proceeds from sale of property and equipment               146,900       (b)       14,884,963
   Additions of property and equipment                        (78,963)      (b)      (27,222,349)
                                                            ---------               ------------
       NET CASH PROVIDED BY (USED IN)
       INVESTING ACTIVITIES                                    67,937                (12,337,386)
                                                            ---------               ------------

CASH FLOWS FROM FINANCING ACTIVITIES:
   Proceeds from exercise of stock options and
       warrants                                                                          611,738
   Proceeds from issuance of notes payable                                            22,040,000
   Payments on commercial paper, other short
       term borrowings and notes payable                                              (6,980,406)
   Increase in other assets                                                             (213,664)
                                                            ---------               ------------
     NET CASH PROVIDED BY (USED IN)
     FINANCING ACTIVITIES                                                             15,457,668
                                                            ---------               ------------
     NET DECREASE IN CASH                                     126,912                 11,372,843
CASH AND CASH EQUIVALENTS AT
BEGINNING OF PERIOD                                            24,260                 13,731,998
                                                            ---------               ------------
CASH AND CASH EQUIVALENTS AT END
OF PERIOD                                                   $ 151,172               $ 25,104,841
</TABLE>
    

   
Notes:       (a) Combine cash flow of the 1991-1 Partnership.
             (b) Combine cash flows of the 1989-1 Partnership and 1990-1
                 Partnership.
             (c) Eliminate intercompany items.
    


                                      103

<PAGE>   117


                 PRO FORMA CONSOLIDATED STATEMENT OF OPERATIONS
                      FOR THE YEAR ENDED DECEMBER 31, 1994
   
<TABLE>
<CAPTION>

                                                   Consolidated    Minimum                            Remaining
                                                  Benton Oil and   Pro Forma            Minimum      Pro Forma           Maximum
                                                   Gas Company    Adjustments  Notes   Pro Forma    Adjustments  Notes  Pro Forma
                                                  ---------------------------------------------------------------------------------
<S>                                               <C>             <C>          <C>    <C>           <C>           <C>   <C>
REVENUES:

     Oil and gas sales                             $31,942,810    $  71,407    (a)    $32,014,217   $   519,381   (b)   $32,533,598
     Gain on exchange rates                          1,445,307                          1,445,307                         1,445,307
     Investment earnings                             1,180,824        1,938    (a)      1,182,762         5,640   (b)     1,188,402
     Partnership fees, reimbursement and other         135,865       (6,792)   (c)        129,073       (35,657)  (c)        93,416
                                                   -----------    ---------           -----------   -----------         -----------
                                                    34,704,806       66,553            34,771,359       489,364          35,260,723
                                                   -----------    ---------           -----------   -----------         -----------

EXPENSES

     Lease operating costs and production taxes      9,531,264       28,991    (a)      9,560,255       268,121   (b)     9,828,376
     Depletion, depreciation and amortization       10,298,112       38,867    (d)     10,336,979       314,945   (d)    10,651,924
     General and administrative                      5,241,295       20,824    (a)      5,255,327        91,038   (b)     5,310,708
                                                                     (6,792)   (c)                      (35,657)  (c)
     Interest                                        3,887,961                          3,887,961                        3,887,961
     Minority interest in net income                 2,094,211                          2,094,211                        2,094,211
                                                   -----------    ---------           -----------   -----------         -----------
                                                    31,052,843       81,890            31,134,733       638,447          31,773,180
                                                   -----------    ---------           -----------   -----------         -----------
Income before income taxes and roll-up
    expenses and payments                            3,651,963      (15,337)            3,636,626      (149,083)          3,487,543
Income taxes                                          (697,802)                          (697,802)                        (697,802)
                                                   -----------    ---------           -----------   -----------
Income before roll-up expenses and payments          2,954,161      (15,337)            2,938,824      (149,083)          2,789,741
Roll-up expenses and payments                                       939,940    (e)        939,940     1,761,298   (e)     2,701,238
                                                   -----------    ---------           -----------   -----------
Income after roll-up expenses and payments         $ 2,954,161    $(955,277)          $ 1,998,884   $(1,910,381)        $    88,503
                                                   ===========    =========           ===========   ===========         ===========

Income per common share:
     Before roll-up expenses and payments                $0.12                              $0.12                             $0.11
     After roll-up expenses and payments                 $0.12                              $0.08                             $0.00
Weighted average common shares outstanding          24,850,922                         24,877,694                        25,022,802
                                                   ===========                        ===========                       ===========

Ratio of earnings to fixed charges:
     Before roll-up expenses and payments                1.92x                              1.92x                             1.88x
     After roll-up expenses and payments                 1.92x                              1.68x                             1.20x
</TABLE>
    
   
Notes:       (a) Record the participants' shares of the 1991-1 Partnership.
             (b) Record the participants' share of the 1989-1 Partnership and
                 1990-1 Partnership.
             (c) Eliminate allocated overhead costs from partnerships.
             (d) Record depletion on oil and gas properties acquired from
                 partnerships.
             (e) Record roll-up expenses and payments associated with the
                 acquisition of partnership units. Included as roll-up expenses
                 and payments are the value of the warrants issued to the
                 participants (which are being issued as an inducement to the
                 participants to accept the Exchange Offer) and issuance and
                 distribution expenses which will be charged to paid in capital
                 in connection with the issuance of the securities.

The participants are given the option of accepting either cash or shares of the
Company's common stock in exchange for their partnership units. The pro-forma
statements of operations above assume that the participants accept stock in
exchange for their partnership units. If all the participants accept cash rather
than shares the weighted average number of shares would be 24,850,922 for both
the minimum and maximum pro forma statements of operations.
    

                                      104

<PAGE>   118

                 PRO FORMA CONSOLIDATED STATEMENT OF CASH FLOWS
                      FOR THE YEAR ENDED DECEMBER 31, 1994
   
<TABLE>
<CAPTION>

                                                 Consolidated     Minimum                          Remaining
                                                  Benton Oil     Pro Forma           Minimum       Pro Forma           Maximum
                                                    and Gas     Adjustments  Notes   Pro Forma     Adjustments  Notes  Pro Forma
                                                    Company
                                                 ----------------------------------------------------------------------------------
<S>                                              <C>            <C>          <C>    <C>            <C>          <C>    <C>
CASH FLOWS FROM
OPERATING ACTIVITIES:
Net Income (loss)                                $  2,954,161     ($15,337)  (a)    $  2,938,824    $(149,083)  (b)    $  2,789,741
Adjustments to reconcile net income (loss)
   to net cash provided by (used in) operating
   activities:
   Depletion, depreciation and amortization        10,298,112       38,867   (a)      10,336,979      314,945   (b)      10,651,924
   Net earnings from limited partnerships             (63,486)       7,520   (c)         (55,966)      55,966   (c)
   Amortization of financing  costs                   114,311                            114,311                            114,311
   Minority interest in undistributed earnings
     of subsidiary                                  2,094,211                          2,094,211                          2,094,211
   (Increase) decrease in accounts receivable     (10,384,670)                       (10,384,670)                       (10,384,670)
   (Increase) decrease in prepaid expenses
     and other                                        (84,905)      (2,292)  (a)         (87,197)      (2,265)  (b)         (89,462)
   Increase in accounts payable                     7,974,335                          7,974,335                          7,974,335
   Increase (decrease) in accrued interest
       payable, payroll and related taxes             560,720                            560,720                            560,720
                                                  -----------    ----------         ------------    ---------          ------------
       TOTAL ADJUSTMENTS                           10,508,628       44,095            10,552,723      368,646            10,921,369
                                                  -----------    ----------         ------------    ---------          ------------
       NET CASH PROVIDED BY
       OPERATING ACTIVITIES                        13,462,789       28,758            13,491,547      219,563            13,711,110
                                                  -----------    ----------         ------------    ---------          ------------

CASH FLOWS FROM INVESTING ACTIVITIES:
   Proceeds from sale of property and equipment     5,803,215        7,699   (a)       5,810,914        7,672   (b)       5,818,586
   Additions of property and equipment            (38,403,322)     (23,323)  (a)     (38,426,645)    (155,822)  (b)     (38,582,467)
   Increase in restricted cash                    (19,250,000)                       (19,250,000)                       (19,250,000)
   Distributions from limited partnerships            502,167     (127,205)  (c)         374,962     (598,960)  (c)        (223,998)
   Payment for purchase of Benton-Vinccler, net
       of cash acquired                            (2,501,973)                        (2,501,973)                        (2,501,973)
                                                  -----------    ----------         ------------    ---------          ------------
       NET CASH PROVIDED BY USED IN
       INVESTING ACTIVITIES                       (53,849,913)    (142,829)          (53,992,742)    (747,110)          (54,739,852)
                                                  -----------    ----------         ------------    ---------          ------------

CASH FLOWS FROM FINANCING ACTIVITIES:
   Proceeds from exercise of stock options and         83,740                             83,740                             83,740
      warrants
   Proceeds from issuance of notes payable         21,360,000                         21,360,000                         21,360,000
   Proceeds from commercial paper and other
      short term borrowings                        23,217,775                         23,217,775                         23,217,775
   Increase in other assets                        (1,683,583)      (2,939)    (a)    (1,686,522)      19,225   (b)      (1,667,297)
   Payments on commercial paper, other short
        term borrowings and notes payable         (24,706,358)                       (24,706,358)                       (24,706,358)
   Payment of stock issuance costs                   (545,000)                 (d)      (545,000)                          (545,000)
                                                  -----------    ----------         ------------    ---------          ------------
     NET CASH PROVIDED BY (USED IN)
     FINANCING ACTIVITIES                          18,271,574     (547,939)           17,723,635       19,225            17,742,860
                                                  -----------    ----------         ------------    ---------          ------------
     NET DECREASE IN CASH                         (22,115,550)    (662,010)          (22,777,560)    (508,322)          (23,285,882)
CASH AND CASH EQUIVALENTS AT
BEGINNING OF PERIOD                                36,308,118      177,180            36,485,298      532,582            37,017,880
                                                  -----------    ----------         ------------    ---------          ------------
CASH AND CASH EQUIVALENTS AT END OF
PERIOD                                            $14,192,568    ($484,830)         $ 13,707,738    $  24,260          $ 13,731,998
                                                  ===========    ==========         ============    =========          ============
</TABLE>
    

   
Notes:       (a) Combine cash flow of the 1991-1 Partnership.
             (b) Combine cash flows of the 1989-1 Partnership and 1990-1
                 Partnership.
             (c) Eliminate intercompany items.
             (d) Record issuance costs associated with the acquisition of
                 partnership units.
    


                                      105


<PAGE>   119

   
                          INFORMATION CONCERNING BENTON
    

BUSINESS

   
        Benton Oil and Gas Company is primarily engaged in the development and
production of oil and gas properties. The Company's operations are focused on
the eastern region of Venezuela, the Gulf Coast region of Louisiana and the West
Siberia region of Russia. Benton's business strategy is to seek new reserves in
areas of low geologic risk and to exploit underdeveloped existing oil and gas
fields. The Company implements the exploitation strategy through the in-house
design and interpretation of 3-D seismic surveys and through workovers,
recompletions, redrilling and exploration and development drilling.
    

        Internationally, the Company seeks projects with significant reserve
potential in areas with low geologic risk and known proved reserves where, in
certain situations, the Company can add value by employing modern exploration,
drilling, completion and production techniques. To reduce risk, control costs,
and facilitate local transactions, the Company has formed ventures with local
foreign partners.

        Domestically, the Company integrates 3-D seismic technology with
subsurface geologic data from previously drilled wells. This geophysical
evaluation enables the Company to discover previously undetected reserves in
existing fields. The Company believes that it enjoys a competitive advantage in
finding and developing reserves on an economic basis because of its
concentration on 3-D seismic technology, the training and qualifications of its
in-house technical team and the practical experience and knowledge which this
team has acquired over past years. The Company's recognized technical expertise
has afforded it access to projects it otherwise would not have enjoyed.

        In the ordinary course of its business, the Company continues to
evaluate acquisition, joint venture and other opportunities that would enable it
to further its business strategy.

Principal Areas of Activity

        The following table summarizes the Company's proved reserves at December
31, 1994 by principal geographic area:

<TABLE>
<CAPTION>
                                                   PROVED RESERVES
                            -------------------------------------------------------------
                              CRUDE OIL AND
                            CONDENSATE (MBBL)   NATURAL GAS (MMCF)  OIL EQUIVALENT (MBOE)
<S>                         <C>                 <C>                 <C>   
Venezuela(1)                      60,707                   0              60,707
United States                        233              16,077               2,913
Russia(2)                         17,540                   0              17,540
                                  ------              ------              ------
Total                             78,480              16,077              81,160
                                  ======              ======              ======
</TABLE>

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

(1)  All Venezuelan reserves are attributable to an operating service agreement
     between Benton-Vinccler and Lagoven, S.A. under which all mineral rights
     are owned by the Government of Venezuela.

                                      106
<PAGE>   120

(2)  The Company's engineering estimates, which have been prepared by the
     Company and audited by Huddleston & Co., Inc., independent petroleum
     engineers, indicate that approximately 18 Bcf of natural gas reserves (net
     to the Company's interest) will be developed and produced in association
     with the development and production of the Company's proved undeveloped oil
     reserves in Russia. The Company expects that, due to current market
     conditions, it will initially reinject or flare such associated natural gas
     production and, accordingly, no future net reserves have been assigned to
     these reserves. Under the joint venture agreement, such reserves are owned
     by the Company in the same proportion as all other hydrocarbons in the
     North Gubkinskoye Field, and subsequent changes in conditions could result
     in the assignment of value to these reserves.

VENEZUELA

   
        In July 1992, the Company and Vinccler, a Venezuelan construction and
engineering company, signed an operating service agreement with Lagoven, S.A.
("Lagoven"), an affiliate of the national oil company, Petroleos de Venezuela
S.A. ("PDVSA"), to reactivate and further develop the Uracoa, Bombal and
Tucupita Fields (the "Fields"), which are a part of the South Monagas Unit (the
"Unit"). Of the 230 foreign companies responding to Venezuela's initial call for
indications of interest, the Company was one of three foreign companies
ultimately awarded an operating service agreement to reactivate existing fields
by PDVSA. The Company was the first U.S. company since 1976 to be granted such
an oil field development contract in Venezuela.
    

        Under the terms of the operating service agreement, Benton-Vinccler, the
Company's 80% owned Venezuelan subsidiary, is a contractor for Lagoven and is
responsible for overall operations of the South Monagas Unit, including all
necessary investments to reactivate and develop the Fields comprising the Unit.
The Venezuelan government maintains full ownership of all hydrocarbons in the
Fields. Benton-Vinccler invoices Lagoven each quarter based on Bbls of oil
accepted by Lagoven during the quarter, using quarterly adjusted contract
service fees per Bbl, and receives its payments from Lagoven in U.S. dollars
deposited directly into a U.S. bank account. The operating service agreement
provides for Benton-Vinccler to receive an operating fee for each Bbl of crude
oil delivered and a capital recovery fee for certain of its capital
expenditures, provided that such operating fee and capital recovery fee cannot
exceed the maximum total fee per Bbl set forth in the agreement. The operating
fee is subject to periodic adjustments to reflect changes in the special energy
index of the U.S. Consumer Price Index, and the maximum total fee is subject to
periodic adjustments to reflect changes in the average of certain world crude
oil prices. During each quarter of 1994, the adjusted maximum total fee was less
than the adjusted operating fee, resulting in no capital recovery fee. The
Company cannot predict the extent to which future maximum total fee adjustments
will provide for a capital recovery fee.

        The Unit is in the southeastern part of the state of Monagas in eastern
Venezuela. The Unit is approximately 51 miles long, eight miles wide and
consists of 157,843 acres, of which the Fields comprise approximately one-half.
Benton-Vinccler intends to explore the remaining portions of the Unit for
possible development activities. At December 31, 1994, Proved Reserves
attributable to the Company's Venezuelan operations were 60.7 MMBOE, which
represented 75% of the Company's Proved Reserves, all of which were located in
the Uracoa and Bombal Fields. Benton-Vinccler has reactivated fifteen previously
drilled wells and completed 21 new wells using modern drilling and completion
techniques that have not previously been utilized on the Fields. Benton-Vinccler
also has installed specialized production facilities commonly used in heavy oil
production in the United States but not previously utilized extensively in
Venezuela to process crude oil of similar gravity or quality. Benton-Vinccler
commenced production during the second quarter of 1993. During 1994, average
daily production steadily increased from 3,400 Bbl of oil during the first
quarter to 6,700 Bbl in the second quarter, 7,200 Bbl in the third quarter and
10,200 Bbl in the fourth quarter. Currently, 36 wells are producing
approximately 14,000 Bbl of oil per day.

                                      107
<PAGE>   121

        Benton-Vinccler intends to completely develop the Uracoa Field by
drilling approximately 90 to 100 wells. It also plans to reactivate and
completely develop the Bombal Field by drilling approximately 25-30 wells and to
evaluate the potential of the Tucupita Field in 1996 by testing 3 wells. During
the first quarter of 1995, Benton-Vinccler shot 150 kilometers of seismic and is
currently interpreting the data. Following the initial interpretations of such
seismic, Benton-Vinccler may also drill one or more wells to extend the
boundaries of the three known fields or to confirm the existence of additional
fields previously undetected in the area. Budget and development plans submitted
by Benton-Vinccler have been approved by Lagoven in the past and the Company
believes that such approvals will be granted in the future.

        In June 1994, the Venezuelan government, amid economic uncertainties and
bank crises, suspended certain constitutional rights and implemented certain
exchange and price controls. Currently, exchange and price controls remain in
place, with no indication of when such controls will be lifted. To date, neither
the current economic uncertainties nor the exchange and price controls have had
an adverse effect on the Company's operations in Venezuela. The Company has
applied for insurance to cover the risk of currency repatriation and
inconvertibility, expropriation and interference with operations for its
Venezuelan operations with OPIC, an agency of the United States government.
While OPIC has indicated that such insurance is available, there can be no
assurance that the Company will be able to obtain this insurance.

UNITED STATES

Louisiana. The Company has successfully pursued acquisition and joint venture
opportunities in the United States which have become more readily available as
major oil and gas companies continue to consolidate operations and focus
exploration and development activities outside the United States. At December
31, 1994, Proved Reserves of the Company attributable to the United States were
2.9 MMBOE, which represented 4% of the Company's Proved Reserves. Substantially
all of the Company's domestic activities are located in the Louisiana Gulf Coast
at the West Cote Blanche Bay, Rabbit Island and Belle Isle Fields. The Company,
Texaco, Inc. ("Texaco") and Oryx Energy Company ("Oryx") are currently producing
from and further developing the fields by using 3-D seismic technology
integrated with subsurface geologic data from previously drilled wells. In
addition, the Company entered into certain agreements with Tenneco Ventures
Corporation ("Tenneco") whereby Tenneco has purchased certain interests in the
Company's operations in the three fields and was given the right to participate
as a 50% partner in certain of the Company's future activities in the Gulf Coast
for the next five years.

        Several key elements common to the three fields include their discovery
and initial development prior to World War II, peak production periods occurring
prior to 1960, extremely complex geology, relatively little modern exploration
technology being applied, and long-term natural gas sales contracts at prices
below $0.30 per Mcf which discouraged any significant drilling and development
until the contracts expired in the last few years.

        The state leases relating to these fields were subject to litigation
between Texaco and the State of Louisiana. Although the Company was not a party
to this litigation, its interests in the three fields were subject to the
litigation. In February 1994, Texaco and the State entered into a Global
Settlement Agreement. As a result of this agreement, Texaco committed to certain
acreage development and drilling obligations which may affect the Company and
certain of its Louisiana properties. The Company believes that the settlement
should have no effect on its proved reserves and will have no material adverse
effect on the Company.

                                      108
<PAGE>   122

        West Cote Blanche Bay Field. The West Cote Blanche Bay Field is located
on 5,892 acres in a shallow bay in St. Mary Parish, approximately 125 miles
southwest of New Orleans with water depths averaging seven to eight feet. The
field was discovered in 1938 by Texaco, which continues to operate the field.
The Company believes that, at approximately 3.5 miles long and two miles wide,
the West Cote Blanche Bay Field contains one of the largest salt domes in the
Gulf Coast. More than 300 separate oil and gas reservoirs have been identified
by Texaco and the Company from a total of approximately 680 wellbores in 180
different sandstone formations, at depths from 1,700 to 13,000 feet. At December
31, 1994, the field had cumulatively produced over 181 MMBbl of oil and 225 Bcf
of natural gas.

        Since the Company's first acquisition of an interest in the West Cote
Blanche Bay Field, it has worked with Texaco in the technical evaluation of the
field. Until late 1994, the prospect evaluations covered all depths and included
the drilling wells and a substantial number of recompletions and replacement
wells in oil reservoirs at depths of 2,000 to 10,500 feet. As a result of
ongoing evaluation, in late 1994 the Company decided to focus almost exclusively
on exploitation of gas and oil reservoirs at depths below 10,000 feet, utilizing
the results of the 3-D seismic interpretations. To mitigate the risk of
concentrating on deeper, more expensive wells, the Company sold approximately
25% of its working interest to Tenneco. Also, in March 1995, the Company and its
affiliates and Tenneco sold their interests in the shallower oil depths (above
approximately 10,575 feet) to WRT Energy Corporation, another working interest
owner in the field.

        Rabbit Island Field. Rabbit Island is located in state waters in Iberia
and St. Mary Parishes, approximately 95 miles southwest of New Orleans. The dome
was discovered in 1939 by Texaco which continues to operate the field. Compared
to West Cote Blanche Bay, on whose 5,892 acres more than 800 wells have been
drilled, just over 200 wells have been drilled on the 27,909 acres of the Rabbit
Island Field. Cumulative production through December 31, 1994 was 48 MMBbl of
oil and 1.2 Tcf of gas from 51 productive zones.

        In 1992, the Company signed an agreement with Texaco to fund and conduct
a 3-D seismic program covering approximately 105 square miles over the Rabbit
Island project area. The estimated cost to the Company of this program is
approximately $6.0 million, substantially all of which has been expended. The
seismic survey has been shot, processed and is currently being interpreted.

        Pursuant to the agreement, the Company may drill five wells over a
period of up to five years. As identified below, the first well has been
drilled. Assuming the remaining four wells are drilled in accordance with the
terms set forth in the agreement, the Company will earn a 50% working interest
in the entire field (other than among other things, wells previously drilled by
Texaco). The first well in the drilling program was successfully completed in
January 1995 and is currently producing approximately 9.5 MMcf of natural gas
per day. The Company expects to drill up to four additional wells during 1995 at
Rabbit Island at a cost of up to $4 million.

        Certain of the Company's rights and 50% of its interest in the Field
were sold to Tenneco in July 1993. In May 1995, the Company and Tenneco signed
an agreement in principle with Texaco to expand the acreage under the Rabbit
Island Field agreement by 10,452 acres in exchange for an increase in the number
of earning wells to be drilled by the Company from 5 to 8 wells.

        Belle Isle Field. The Belle Isle Field is located on the shore of the
Atchafalaya Bay, approximately 75 miles southwest of New Orleans, in St. Mary
Parish. The field was discovered in 1941 and developed by Sun Oil Company.
Currently, 12,000 acres on the north portion of the field are operated by Oryx,
and 6,400 acres on the south portion of the field are operated by Apache
Corporation 

                                      109
<PAGE>   123

(previously operated by Texaco). As of December 31, 1994, the Belle Isle Field
had cumulatively produced over 50 MMBbl of oil and 1 Tcf of natural gas.

        In 1990, the Company reached an agreement with Oryx to shoot a 3-D
seismic survey over its portion of the field. Pursuant to the agreement, upon
completing the survey and processing the seismic data, Oryx granted the Company
the right to participate in the drilling of wells on Oryx's portion of the field
and the Company will have a 33% working interest in any well so drilled from the
top of the deep sands known as the "Rob L Sands" (at a depth of 12,500 feet) and
below. Under the agreement, up to two exploratory wells and two development
wells may be drilled in any calendar year. In the event that Oryx decides to
solicit the participation of a third party in certain drilling operations above
the Rob L Sands, Oryx has granted the Company a right of first refusal to
participate in such drilling and receive a 33% working interest in the resulting
wells.

        In 1991, the Company reached an agreement with Texaco to evaluate 5,500
acres on the southern portion of the field by extending the 3-D seismic survey.
Pursuant to this agreement, upon the Company's completion of the seismic survey
and its drilling of an initial test well in accordance with the terms set forth
in the agreement, Texaco assigned to the Company a 50% working interest in its
entire 6,400 acre portion of the Belle Isle Field (other than, among other
things, existing wells previously drilled by Texaco).

        In 1992, the Company completed a 55.75 square mile 3-D seismic survey
over the Belle Isle Field, thereby satisfying the survey obligations that are
prerequisites for earning working interests in the Texaco portion of the Field
and the Oryx wells. The survey was reprocessed in 1993 and is being evaluated on
an ongoing basis. In 1993, the Company satisfied the drilling requirements under
the agreement with Texaco, thereby earning its 50% working interest on the
Texaco portion of the field.

        In October 1994, the Company completed the Belle Isle State Lease 340
No. 1 well. This well is currently producing at rates of approximately 6 MMcf of
natural gas per day. The Company has until September 1, 1997 to exercise its
right to participate in any future Oryx wells. If the Company has participated
in the drilling of a producing well by that time, the Company's right to
participate in future wells will continue. Certain of the Company's rights and
50% of its interest in the Field were sold to Tenneco in July 1993.

        In January 1995 Texaco sold its interest in Belle Isle to Apache
Corporation. The Company is unable at this time to assess the impact on the
development of the field as a result of this sale.

        Tenneco Agreements. In June 1993, the Company entered into an agreement
with Tenneco which provided for payments to the Company of approximately $6.7
million in exchange for a 50% interest in the Company's operations at the Rabbit
Island and Belle Isle Fields. The agreement also provided Tenneco with a five
year option to participate on a promoted basis as a 50% partner in any future
ventures that the Company acquired in the Gulf Coast area, except for the West
Cote Blanche Bay Field. The Company also has granted an option in favor of
Tenneco to purchase, at a market price, all of the Company's gas produced from
the Gulf Coast. Tenneco has exercised its option to purchase the Company's share
of natural gas production from all three fields.

        In November 1994, the Company sold to Tenneco a 10.8% working interest
(24.9% of the Company's 43.3% working interest) in the West Cote Blanche Bay
Field for approximately $5.8 million and future consideration of up to $3.7
million.

                                      110
<PAGE>   124

        WRT Agreement. In March 1995, the Company and its affiliates and Tenneco
sold to WRT Energy Corporation a 43.75% working interest in the shallower depths
(above approximately 10,575 feet) in the West Cote Blanche Bay Field for an
aggregate purchase price of $20 million. Of this aggregate purchase price, the
Company received $14.9 million.

OTHER PROPERTIES

        At December 31, 1994, the Company had proved reserves of 180 MBOE and 6
MBOE in the Umbrella Point Field in Texas and certain fields in Louisiana and
Mississippi, respectively. In July 1995, the Company sold its interest in the
Umbrella Point Field.

        Actual exploration and development activities in the United States could
ultimately vary from those currently projected by the Company, depending, among
other factors, on the availability of drilling rigs, the availability of
financing, the success of the activities and the continued concurrence of
working interest partners as to the timing and extent of such activities.

RUSSIA

        In December 1991, the joint venture agreement forming GEOILBENT among
the Company (34% interest) and two Russian partners, Purneftegasgeologia and
Purneftegas (each having a 33% interest), was registered with the Ministry of
Finance of the USSR. The Company's partners are the official exploration and
production bodies which have been discovering and operating fields in the region
covered by the joint venture for many years, and which have access to pipelines,
railroads and other vital infrastructure. GEOILBENT develops, produces and
markets oil and condensate from the North Gubkinskoye Field in the West Siberia
region of Russia, approximately 2,000 miles northeast of Moscow. The field,
which covers an area approximately 15 miles long and 4 miles wide, has been
delineated with over 60 exploratory wells (which tested 26 zones) and is
surrounded by large proven fields. Before commencement of GEOILBENT's
operations, North Gubkinskoye was one of the largest non-producing fields in the
region. At December 31, 1994, the Proved Reserves attributable to the North
Gubkinskoye Field were 17.5 MMBOE, which represented 22% of the Company's Proved
Reserves.

        During the third quarter of 1992, GEOILBENT commenced initial operations
which included the construction of a 37 mile oil pipeline and installation of
temporary production facilities. Completed in April 1993, with a design capacity
of 75,000 Bbl of oil per day, the pipeline transports oil from the North
Gubkinskoye Field south to the main Russian oil pipeline network. The venture
has been exporting oil since the fourth quarter of 1993.

        GEOILBENT identified nine previously existing delineation wells that
were capable of being reentered and placed these on production. These
delineation wells were not originally intended by Purneftegasgeologia to be
commercial producers. Therefore, completion procedures for optimum production
were not employed. The Company believes that production rates from future wells
using western completion technologies will be significantly greater. GEOILBENT
has commenced drilling a series of development wells in the North Gubkinskoye
Field. Three Russian drilling rigs are drilling development wells offsetting
previously drilled exploration wells.

        GEOILBENT is utilizing Russian equipment and personnel whenever
feasible. Supervision is provided jointly by an American and Russian management
team. Russian equipment, including Russian rigs, are being upgraded by certain
western technology and materials including shaker screens, monitoring equipment
and drilling and completion fluids. Such measures, along with paying for Russian


                                      111
<PAGE>   125

equipment and personnel in rubles, allows GEOILBENT to minimize its investment
and operating expenses.

        Russia has established an export tariff on all oil exported from Russia
which, as imposed, has the effect of significantly reducing the cash flows and
potential profits to the Company. However, Russia has issued or drafted various
decrees and legislation under which certain oil and gas joint ventures,
including GEOILBENT, are eligible for relief from such oil export tariff until
such time as they have recovered their capital investment. GEOILBENT has
received a waiver from the export tariff for 1995, and expects to apply for
renewal of such waiver for 1996 and 1997. However, there can be no assurance
that any such renewals can be obtained. Furthermore, after the waiver for 1995
was issued to GEOILBENT, a new Russian law came into force which repeals all tax
and customs benefits previously granted to participants in foreign economic
activities, except for those granted pursuant to certain federal laws, including
the law "On Customs Tariff". While it is not clear whether the repeal applies to
GEOILBENT's waiver for 1995, GEOILBENT believes that its waiver should be
regarded as granted pursuant to the law "On Customs Tariff". The legislative and
regulatory environment in Russia continues to be subject to frequent change and
uncertainty. The Company believes that the joint venture partners will
continually assess regulatory and economic conditions affecting the Russian
operations, make investment decisions accordingly and make adjustments to the
amount and/or timing of contribution requirements as appropriate and permitted
under the law. In addition, the license which grants GEOILBENT the right to
develop the North Gubkinskoye Field sets forth required levels of oil and gas
production through the year 2000 and requires GEOILBENT to make additional
royalty payments in the event that such production levels are not achieved
during any three year period.

        As part of its plan to fund the development of the North Gubkinskoye
Field, the Company has retained Morgan Guaranty to act as financial advisor to
the Company and GEOILBENT in obtaining project debt financing. Morgan Guaranty
has assisted the Company in approaching multilateral financial institutions and
export finance agencies. Any retainer and percentage success fees paid to Morgan
Guaranty will be credited as the Company's capital contribution. There can be no
assurance that such financing will become available on terms acceptable to the
Company or GEOILBENT.

        GEOILBENT has been successful, on a limited basis, in obtaining working
capital funding from certain institutions in Moscow. NAFTA Moscow, the exporter
which handles GEOILBENT's oil sales, made a short-term production payment
advance during the quarter ended March 331, 1995 of $3.0 million. International
Moscow Bank, which is majority owned by non-Russian European banks, has made two
short-term loans to GEOILBENT totaling $6 million. The bank loans were
guaranteed by the Company, which is providing certain portions of the cash for
such debt service during 1995 to complete its charter fund obligation.

RECENT EVENTS

        On June 30, 1995, Benton issued $20 million in 13% senior unsecured
notes due June 30, 2007. Interest is payable semi-annually on June 30 and
December 30, beginning December 30, 1995. Annual principal payments of $4
million are due on June 30 of each year, beginning June 30, 2003. The proceeds
from the note offering will be used primarily for the continued development of
Benton's Venezuelan project and for working capital purposes.

                                      112
<PAGE>   126

                    INFORMATION CONCERNING 1989-1 PARTNERSHIP

GENERAL

        Objectives. The 1989-1 Partnership is a limited partnership which was
formed to invest in oil and natural gas activities by acquiring proven producing
properties that have additional development potential, recompleting previously
drilled wells and drilling new wells. The primary financial objective of the
1989-1 Partnership is to make quarterly distributions to its Investors from
available cash flow while replacing and expanding its reserves on a
cost-effective basis. The Partnership made regular distributions to partners
through August 1994, but has not made subsequent cash distributions due to
declining oil and gas production combined with higher lease operating expenses
and production taxes, continued capital expenditures and lower natural gas
prices.

        Management. Benton Oil and Gas Company and a wholly-owned subsidiary,
Benton Oil and Gas Company of Louisiana, are the Co-Managing General Partners.
Benton makes all decisions regarding the business and operations of the 1989-1
Partnership, including production, development and other activities, and any
sale of properties and the acquisition of additional properties.

        The Managing General Partners receive 1.0% of the oil and gas revenues
on proven producing wells, 25.75% of the oil and gas revenues on recompleted
wells and 35.65% of the oil and gas revenues on new wells. In addition, Benton
and its subsidiary own 2.8182 Units in the 1989-1 Partnership.

   
        The Co-Managing General Partners do not receive any management fees or
other fees from the 1989-1 Partnership. The 1989-1 Partnership pays the
Co-Managing General Partners for lease operating expenses, well costs and
general and administrative expenses incurred on behalf of the Partnership.
    

        Organization. Benton, as managing general partner and sponsor of the
1989-1 Partnership, sold an aggregate of $1,409,091 in 1989-1 Units. Of the net
proceeds raised of $1,260,214 which were available for partnership activities,
$815,526 was used in oil and gas activities of the Partnerships, as contemplated
in the private placement memorandum for the offering, and the remaining proceeds
were distributed to the participants.

DESCRIPTION OF OIL AND GAS PROPERTIES

        The following table sets forth certain information as of January 1, 1995
related to the 1989-1 Partnership's interest in its oil and gas properties.

                                      113
<PAGE>   127

<TABLE>
<CAPTION>
                                                   Proved Reserves at January 1, 1995                 1994 Production
                                                   ----------------------------------                 ---------------
                                                                      Present Value of
                                                                    Estimated Future Net
                                                                   Cash Flows Discounted
Property                          Oil (Bbls)          Gas (Mcf)            at 10%               (Bbls)              (Mcf)
- --------                          ----------          ---------    ---------------------        ------              ------
<S>                                 <C>                <C>                <C>                    <C>                <C>   
Umbrella Point Field                24,130             183,181            $325,540               5,475              29,871
East Cameron Block 229                   0                   0                   0                   0               8,173
                                  --------            --------            --------              ------              ------
         TOTAL                      24,130             183,181            $325,540               5,475              38,044
                                  ========            ========            ========              ======              ======
</TABLE>

        Additional information regarding these fields is set forth below.

        Umbrella Point Field. The Umbrella Point Field is located in State
Tracts 74 and 87, which consist of 1,280 acres in the northern end of Upper
Galveston Bay, in Texas state waters. Sun Oil Co. discovered the field in May
1957. Oil and gas production is from fifteen stacked Frio sands ranging in depth
from the F-1 sand at 7,612 feet to the F-15 sand at 8,994 feet. The 1989-1
Partnership has a 4.93% working interest in the Umbrella Point Field with 10
wells producing, as of September 1995, at combined average daily rates of 312
Bbl of oil and 3.1 MMcf of natural gas.

   
        East Cameron Block 229. East Cameron Block 229 is located on 5,000 acres
in federal waters eighty miles off the coast of Grand Chenier, Louisiana in the
Gulf of Mexico. The 1989-1 Partnership has a 6.57% working interest in East
Cameron Block 229. Cumulative expenditures by the 1989-1 Partnership on East
Cameron Block 229 are $144,893. As of January 1, 1995, the 1989-1 Partnership's
interest in East Cameron Block 229 was determined to be uneconomic to produce.
    

                                      114
<PAGE>   128

SELECTED HISTORICAL FINANCIAL DATA

   
The following selected financial data for the 1989-1 Partnership as of and for
each of the years in the five year period ended December 31, 1994 are derived
from the 1989-1 Partnership's audited financial statements. The selected
consolidated financial data for the six months ended June 30, 1994 and 1995 are
derived from the 1989-1 Partnership's unaudited financial statements. In the
opinion of management, such unaudited financial statements contain all
adjustments (consisting of only normal recurring accruals) necessary for a fair
presentation of the financial condition and results of operations as of and for
the periods presented. Operating results for the six months ended June 30, 1995
are not necessarily indicative of the results that may be expected for the
entire fiscal year ending December 31, 1995. The selected financial data below
should be read in conjunction with the 1989-1 Partnership's financial statements
and related notes thereto and Management's Discussion and Analysis of Financial
Condition and Results of Operations included elsewhere in this Prospectus.
    

   
<TABLE>
<CAPTION>
                                                                                                          Six Months Ended
                                                      Years Ended December 31,                                June 30,
                                -----------------------------------------------------------------     -----------------------
                                   1990          1991          1992          1993          1994          1994          1995
                                   ----          ----          ----          ----          ----          ----          ----
<S>                             <C>           <C>           <C>           <C>           <C>           <C>           <C>      
Operating Data
  Total revenue                 $ 212,781     $ 217,023     $ 225,460     $ 203,380     $ 160,413     $  87,880     $  77,765
  Lease operating costs
   and production taxes            60,471        85,894        73,309        76,855        79,479        33,929        31,001
  Exploration costs                                             1,627         1,891           789           789
  Depletion, impairment
   and amortization                46,224        74,122       111,050        72,453        77,895        42,831        90,155

  General and administrative       31,086        17,428        32,110        38,432        33,654        27,032        31,746
                                ---------     ---------     ---------     ---------     ---------     ---------     ---------
   Net income (loss)            $  75,000     $  39,579     $   7,364     $  13,749     ($ 31,404)    ($ 16,701)    ($ 75,137)
                                =========     =========     =========     =========     =========     =========     =========
  Net decrease in
   cash and cash equivalents    ($100,529)    ($ 82,547)    ($241,781)    ($127,320)    ($106,355)    ($ 10,024)    ($    684)
  Net cash provided by
    operating activities          187,669       111,201       117,414        86,202        46,491        26,130        15,018
  Distributions                   140,064       211,364       281,818       169,936       135,615        30,436          --
Per Unit Operating Data(1)
  Net income (loss)                   192            61           (70)          (16)         (149)          (86)         (300)
  Distributions of earnings           192            61          --            --            --            --            --
  Distributions
   representing a return
   of capital                         308           686         1,003           600           162           108          --
</TABLE>
    

   
<TABLE>
<CAPTION>
                                                              December 31,                                        June 30,
                                   ------------------------------------------------------------------    ------------------------
                                      1990           1991          1992         1993           1994          1994          1995
                                      ----           ----          ----         ----           ----          ----          ----
<S>                                <C>           <C>           <C>           <C>           <C>           <C>           <C>       
Balance Sheet Data
  Cash and cash equivalents        $  564,404    $  481,857    $  240,076    $  112,756    $    6,401    $  102,732    $    5,717
  Total assets at book value        1,177,716     1,016,060       727,977       571,790       407,052       524,653       329,634
  Total assets at the value
    assigned for purposes of                                                                                              370,098
    roll-up transaction
  Total liabilities                     3,500        13,629            --            --         2,281            --            --
  General and limited partners'
    equity:
      Managing General Partner         34,706        54,437        79,213        94,780        14,658       101,700        23,147
      Participants                  1,139,510       947,994       648,764       477,010       390,113       422,953       306,487
                                   ----------    ----------    ----------    ----------    ----------    ----------    ----------
                                   $1,174,216    $1,002,431    $  727,977    $  571,790    $  404,771    $  524,653    $  329,634
                                   ==========    ==========    ==========    ==========    ==========    ==========    ==========
Per Unit Balance Sheet Data(1)
  Book value                       $    4,084    $    3,398    $    2,325    $    1,710    $    1,398    $    1,516    $    1,099
  Value assigned for purpose of
    the roll-up transaction                                                                                                 1,312
</TABLE>
    

                                      115
<PAGE>   129

(1)  Per unit data is based on indicated amounts allocable to limited partners
     divided by 279 limited partner units outstanding.

MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF 
OPERATIONS

General

        Benton Oil & Gas Combination Partnership 1989-1, L.P. was formed July
31, 1989 for the purpose of investing in oil and natural gas activities by
acquiring proven producing properties, recompleting previously drilled wells and
developing and drilling oil and gas wells in the state waters of Texas and
off-shore Louisiana. Benton Oil and Gas Company and a wholly owned subsidiary
are the Co-Managing General Partners, and as such, conduct, direct and exercise
full control over all activities of the Partnership.

        Oil and gas properties are accounted for using the successful efforts
methods. Under this method, costs of drilling exploratory wells are initially
capitalized pending determination of whether the well can produce proved
reserves. All costs relating to the non-productive exploratory wells are
expensed. Costs relating to productive exploratory wells and all development
wells are capitalized and depleted on a unit-of-production basis over the life
of the remaining proved developed reserves. Delay rentals and geological and
geophysical costs are expensed as incurred.

        Under the terms of the 1989-1 Partnership Agreement, the participants
pay 99% of the lease acquisition, geophysical and seismic costs, well costs,
general and administrative expenses, and organization and offering expenses,
including commissions, while the Co-Managing General Partners pay 1% of such
costs. Revenues, production taxes and lease operating expenses on proven
producing wells are allocated 99% to the participants and 1% to the Co-Managing
General Partners. Revenues, production taxes and lease operating expenses on
recompleted wells are allocated 74.25% to the participants and 25.75% to the
Co-Managing General Partners. On new wells drilled, revenues, production taxes
and lease operating expenses are allocated 64.35% to the participants and 35.65%
to the Co-Managing General Partners.

Results of Operations

   
        Six months Ended June 30, 1995 and 1994. For the six months ended June
30, 1995, the 1989-1 Partnership had revenues of $77,765 compared to $87,880 for
the same period in 1994, representing a decrease of 12%. This decrease was
primarily due to reduced oil sales quantities and lower gas prices related to
the Umbrella Point Field which were partially offset by increased gas sales
quantities in the field. The production for the six months ended June 30, 1995
was 2,303 Bbl of crude oil and condensate and 23,552 Mcf of natural gas compared
to production of 3,038 Bbl of crude oil and condensate and 18,636 Mcf of natural
gas for the comparable period in 1994. For the six months ended June 30, 1995,
crude oil and natural gas prices averaged $17.34 per Bbl and $1.60 per Mcf,
respectively, compared to $14.69 per Bbl and $2.26 per Mcf, respectively, during
the comparable period.
    

   
        Lease operating costs and production taxes for the period ended June 30,
1995 were $31,001, a decrease of 9% from $33,929 in the comparable period. The
decrease was primarily due to legal fees incurred in 1994 related to damage to
production facilities. Depletion, impairment and amortization expenses were
$90,155 for the period ended June 30, 1995, an increase of 110% from $42,831 for
the comparable period primarily due to the impairment of the Umbrella Point
Field as a result of the proposed sale of the property. General and
administrative expenses were $31,746 for the period ended 
    

                                      116
<PAGE>   130

   
June 30, 1995, an increase of 17% from $27,032 for the comparable period
primarily due to increased audit and tax preparation fees and costs related to
the review of the Partnership's reserves by an independent petroleum engineering
firm.
    

   
        For the reasons discussed above, the net loss for the six months ended
June 30, 1995 was $75,137, compared to a loss of $16,701 for the period ended
June 30, 1994.
    

   
        Years Ended December 31, 1994 and 1993. For the year ended December 31,
1994, the 1989-1 Partnership had total revenues of $160,413 compared to $203,380
for the same period in 1993, representing a decrease of 21%, primarily due to
reduced gas sales quantities and lower oil and gas prices. The production for
the year ended December 31, 1994 was 5,475 Bbl of crude oil and condensate and
38,044 Mcf of natural gas compared to production of 5,773 Bbl of crude oil and
condensate and 47,433 Mcf of natural gas for the comparable period in 1993. For
the year ended December 31, 1994, crude oil and natural gas prices averaged
$15.47 per Bbl and $1.95 per Mcf, respectively, compared to $17.09 per Bbl and
$2.12 per Mcf, respectively, during the comparable period.
    

   
        Lease operating costs and production taxes for the year ended December
31, 1994 were $79,479, an increase of 3% from $76,855 in the comparable period.
A significant portion of the Partnership's lease operating expenses are
associated with fixed rather than variable costs such as contract pumping
services and equipment rentals. While certain variable costs decreased as oil
and gas sales quantities decreased during the period, other non-variable costs
increased resulting in an aggregate increase of $2,624 or 3% during 1994
compared to 1993. Depletion, impairment and amortization expenses were $77,895
for the year ended December 31, 1994, an increase of 8% from $72,453 for the
comparable period primarily due to downward revisions to oil and gas reserves in
the Umbrella Point field during 1994. General and administrative expenses were
$33,654 for the year ended December 31, 1994, a decrease of 12% from $38,432 for
the comparable period primarily due to reduced third party administrative
support costs.
    

        For the reasons discussed above, the net loss for the year ended
December 31, 1994 was $31,404, compared to net income of $13,749 for the year
ended December 31, 1993.

        Years Ended December 31, 1993 and 1992. For the year ended December 31,
1993, the 1989-1 Partnership had total revenues of $203,380 compared to $225,460
for the same period in 1992, representing a decrease of 10%. The production for
the year ended December 31, 1993 was 5,773 Bbl of crude oil and condensate and
47,433 Mcf of natural gas compared to production of 6,947 Bbl of crude oil and
condensate and 47,323 Mcf of natural gas for the comparable period in 1992. For
the year ended December 31, 1993, crude oil and natural gas prices averaged
$17.09 per Bbl and $2.12 per Mcf, respectively, compared to $18.72 per Bbl and
$1.79 per Mcf, respectively, during the comparable period.

   
        Depletion, impairment and amortization expenses were $72,453 for the
year ended December 31, 1993, compared to $111,050 for the same period in 1992,
representing a decrease of 35%. This decrease was primarily due to the complete
depletion of the East Cameron Field in 1992 and was partially offset by
increased depletion of the Umbrella Point Field. General and administrative
expenses for the year ended December 31, 1993 were $38,432 an increase of 20%
from $32,110 in the comparable period primarily due to increased professional
fees.
    

        For the reasons discussed above, the net income for the year ended
December 31, 1993 was $13,749, compared to net income of $7,364 for the year
ended December 31, 1992.

                                      117
<PAGE>   131

Capital Resources and Liquidity

        The oil and gas industry is a highly capital intensive business. The
Partnership requires capital principally to fund the following costs: (i)
drilling and completion costs of wells and the cost of production and
transportation facilities; (ii) purchase of leases and other interests in oil
and gas producing properties; and (iii) general and administrative expenses. The
amount of available capital significantly affects the scope of the Partnership's
operations.

        In June 1995, the Partnership entered into an agreement to sell its
principal remaining oil and gas properties (see Note 4 to the 1989-1 Partnership
Financial Statements). Assuming the sale is completed, the Partnership will have
no further oil and gas activities. If the sale is not completed, the properties
have a remaining economic life of approximately 3.5 years.

Effects of Inflation and Changing Prices

        The 1989-1 Partnership's results of operations and cash flow are
affected by changing oil and gas prices. If the price of oil and gas increases,
there could be a corresponding increase in the cost to the Partnership for
drilling and related services as well as an increase in revenues. To date,
inflation has had a minimal effect on the Partnership.

                    INFORMATION CONCERNING 1990-1 PARTNERSHIP

GENERAL

        Objectives. The 1990-1 Partnership is a limited partnership which was
formed to invest in oil and natural gas activities by primarily acquiring proven
producing properties that have additional development potential, recompleting
previously drilled wells and drilling new wells. The primary financial objective
of the 1990-1 Partnership is to make quarterly distributions to its Investors
from available cash flow while replacing and expanding its reserves on a
cost-effective basis. The Partnership made regular cash distributions to
partners through August 1994, but has not made subsequent cash distributions due
to declining oil and gas production combined with higher lease operating costs
and production taxes, continued capital expenditures and lower natural gas
prices.

        Management. Benton Oil and Gas Company and a wholly-owned subsidiary,
Benton Oil and Gas Company of Louisiana, are the Co-Managing General Partners.
Benton makes all decisions regarding the business and operations of the 1990-1
Partnership, including production, development and other activities, and any
sale of properties and the acquisition of additional properties.

        The Managing General Partners receive 25.5236% of the oil and gas
revenues from the 1990-1 Partnership. In addition, Benton and its subsidiary own
14.192 Units in the 1990-1 Partnership.

   
        The Co-Managing General Partners do not receive any management fees or
other fees from the 1990-1 Partnership. The 1990-1 Partnership pays the
Co-Managing General Partners for lease operating expenses, well costs and
general and administrative expenses incurred on behalf of the Partnership.
    

        Organization. Benton, as managing general partner and sponsor of the
1990-1 Partnership, sold an aggregate of $7,088,000 of 1990-1 Units. Of the net
proceeds raised of $6,070,551 which were available for partnership activities,
$5,007,909 was used in oil and gas activities of the Partnership, as

                                      118
<PAGE>   132

contemplated in the private placement memorandum for the offering, and the
remaining proceeds were distributed to the participants.

DESCRIPTION OF OIL AND GAS PROPERTIES

        The following table sets forth certain information as of January 1, 1995
related to the 1990-1 Partnership's interest in its oil and gas properties.

<TABLE>
<CAPTION>
                                                Proved Reserves at January 1, 1995               1994 Production
                                                ----------------------------------               ---------------
                                                                      Present Value of
                                                                    Estimated Future Net
                                                                   Cash Flows Discounted
Property                             Oil (Bbls)        Gas (Mcf)          at 10%             (Bbls)            (Mcf)
- --------                             ----------        ---------   ---------------------     ------           -------
<S>                                    <C>              <C>            <C>                   <C>               <C>   
Umbrella Point Field                   69,488           527,433        $  937,429            15,709            85,974
West Cote Blanche Bay Field             1,322           132,467           119,694             1,470            13,391
East Cameron Block 229                      0                 0                 0                 0            28,414
                                       ------           -------        ----------            ------           -------
         TOTAL                         70,810           659,900        $1,057,123            17,179           127,779
                                       ======           =======        ==========            ======           =======
</TABLE>

        Additional information regarding these fields is set forth below.

   
        Umbrella Point Field. The Umbrella Point Field is located in State
Tracts 74 and 87, which consist of 1,280 acres in the northern end of Upper
Galveston Bay, in Texas state waters. Sun Oil Co. discovered the field in May,
1957. Oil and gas production is from fifteen stacked Frio sands ranging in depth
from the F-1 sand at 7,612 feet to the F-15 sand at 8,994 feet. The 1990-1
Partnership originally acquired a 17.02% working interest in the Umbrella Point
Field in 1990 for $1,204,222. However, in 1991, it sold a 2.83% working interest
to the 1991-1 Partnership for $373,205 prior to closing adjustments. The 1990-1
Partnership has a 14.19% working interest in the Umbrella Point Field with 10
wells producing, as of September 1995, at combined average daily rates of 312
Bbl of oil and 3.1 MMcf of natural gas.
    

        West Cote Blanche Bay Field. The West Cote Blanche Bay Field is located
on 5,892 acres in a shallow bay in St. Mary Parish, Louisiana, approximately 125
miles southwest of New Orleans with water depths averaging seven to eight feet.
The field was discovered in 1938 by Texaco, which continues to operate the
field. More than 300 separate oil and gas reservoirs have been identified by
Texaco and the Company from a total of approximately 680 wellbores in 180
different sandstone formations, at depths from 1,700 to 13,000 feet. The 1990-1
Partnership originally purchased a 0.38% working interest in the West Cote
Blanche Bay Field in 1990. However, in 1991, it sold a 0.06% working interest to
the 1991-1 Partnership for $94,352 prior to closing adjustments. In March 1995,
the Partnership sold a 0.32% working interest in certain depths (above
approximately 10,575 feet), in the West Cote Blanche Bay Field for a purchase
price of $146,900. The 1990-1 Partnership has a 0.32% working interest in three
wells below the depth of approximately 10,575 feet. These wells are currently
producing at a combined rate of approximately 21 MMcf of natural gas per day.

        East Cameron Block 229. East Cameron Block 229 is located on 5,000 acres
in federal waters eighty miles off the coast of Grand Chenier, Louisiana in the
Gulf of Mexico. The 1990-1 Partnership has a 22.85% working interest in East
Cameron Block 229. Cumulative expenditures by the 1990-1 Partnership 

                                      119
<PAGE>   133

on East Cameron Block 229 are $943,012. As of January 1, 1995, the 1990-1
Partnership's interest in East Cameron Block 229 was determined to be
uneconomic.

        The following is a description of properties in which the 1990-1
Partnership owned an interest, but subsequently sold or abandoned.

        Round Mountain Field. The Round Mountain Field is located on the
southeast flank of the San Joaquin Basin of Kern County, California,
approximately 10 miles northeast of Bakersfield. The field was discovered in
1927 and average drilling depths range from 1,400 feet to 2,100 feet. The 1990-1
Partnership purchased an 8.40% working interest in 32 producing wells in the
Round Mountain Field. However, due to the inability to significantly increase
production and after $787,595 in cumulative expenditures, Benton determined it
was in the best interest of the Partnership to sell its working interest in
Round Mountain Field. In September 1992, the 1990-1 Partnership sold its
interest in Round Mountain to Nahama & Weagant Energy Company for $19,386.

        Hopper Canyon 12-1 Well. The Hopper Canyon 12-1 well is located in
Ventura County, California. This well was successfully drilled and completed in
the fourth quarter of 1991. The well produced at rates of approximately 24 Bbl
of oil and 45 MMcf of gas per day. However, Benton determined it was in the best
interest of the Partnership to sell its 38.0% working interest in the well. In
April 1992, the 1990-1 Partnership sold its interest in the 12-1 well to Fortune
Petroleum. Proceeds from the sale were $17,881, consisting of $3,461 in cash and
stock of Fortune Petroleum with a fair market value of $14,420 (the stock was
subsequently sold in November 1994 with the 1990-1 Partnership receiving
$7,672). In addition, the 1990-1 Partnership retained a production payment of
$8,845 which was paid from monthly net income from the 12-1 well. The 1990-1
Partnership's cumulative expenditures on the Hopper Canyon 12-1 well were
$211,134.

        Prather 43-1 Well. This prospect was located in Acadia Parish,
Louisiana. This well was drilled to a total depth of approximately 11,000 feet.
It was determined to be uneconomical and was plugged and abandoned. The 1990-1
Partnership had a 12.5% working interest in this well with total expenditures of
$96,225.

        North Fisher Reef #13-16A Well. This prospect was located in Trinity
Bay, Chambers County, Texas. This offshore oil and gas prospect was drilled to a
total depth of 11,000 feet in February 1991. This prospect had multiple
objectives, however, all objectives were determined to be non-commercial and the
well was plugged and abandoned. The 1990-1 Partnership had a 44.67% working
interest in this well with cumulative expenditures of $134,715.

SELECTED HISTORICAL FINANCIAL DATA

   
        The following selected financial data for the 1990-1 Partnership, as of
and for each of the years in the five year period ended December 31, 1994 are
derived from the 1990-1 Partnership's audited financial statements. The selected
consolidated financial data for the six months ended June 30, 1994 and 1995 are
derived from the 1990-1 Partnership's unaudited financial statements. In the
opinion of management, such unaudited financial statements contain all
adjustments (consisting of only normal recurring accruals) necessary for a fair
presentation of the financial condition and results of operations as of and for
the periods presented. Operating results for the six months ended June 30, 1995
are not necessarily indicative of the results that may be expected for the
entire fiscal year ending December 31, 1995. The selected financial data below
should be read in conjunction with the 1990-1 Partnership's 
    

                                      120
<PAGE>   134

financial statements and related notes thereto and Management's Discussion and
Analysis of Financial Condition and Results of Operations included elsewhere in
this Prospectus.

                                      121
<PAGE>   135

   
<TABLE>
<CAPTION>
                                                                                                              Six Months Ended
                                     Inception to               Years Ended December 31,                          June 30,
                                      December 31  ----------------------------------------------------    ----------------------
                                          1990         1991           1992          1993         1994         1994         1995
                                          ----         ----           ----          ----         ----         ----         ----
<S>                                   <C>          <C>            <C>            <C>          <C>          <C>          <C>      
Operating Data
  Total revenue                       $  477,806   $ 1,104,681    $   770,517    $ 645,459    $ 524,786    $ 280,792    $ 235,273
  Lease operating costs
   and production taxes                  155,247       440,434        285,840      254,903      263,957      112,323      100,135
  Exploration costs                       29,089       887,842          8,952        9,570        6,607        5,331        1,812
  Loss on sale of oil and
   gas properties                         57,586         1,328
  Depletion, impairment
   and amortization                      142,600       425,583      1,560,665      189,309      224,635      113,834      153,641
  General and administrative              36,753       176,317         69,510       99,967       78,547       58,782       67,323
                                      ----------   -----------    -----------    ---------    ---------    ---------    ---------
     Net income (loss)                $  114,117   ($  825,495)   ($1,212,036)   $  91,710    ($ 48,960)   ($  9,478)   ($ 88,966)
                                      ==========   ===========    ===========    =========    =========    =========    =========

  Net increase (decrease)
   in cash and cash equivalents       $3,057,412   ($1,780,352)   ($  399,559)   ($457,675)   ($401,967)   $   9,583    $ 127,596
  Net cash provided by
    operating activities                 124,336       356,853        407,453      290,032      173,410      104,807       66,003
  Distributions                          706,351     1,071,312        604,582      463,345       64,633           --

Per Unit Operating Data (1)
  Net income (loss)                           24          (703)          (935)           9          (68)         (27)         (76)
  Distributions of earnings                   --            --             --           --           --           --           --
  Distributions
   representing a return of capital           --           500            762          400           66           44           --
</TABLE>
    


   
<TABLE>
<CAPTION>
                                                            December 31,                                   March 31,
                                  --------------------------------------------------------------   -----------------------
                                     1990         1991         1992         1993          1994         1994         1995
                                     ----         ----         ----         ----          ----         ----         ----
<S>                               <C>          <C>          <C>          <C>          <C>          <C>          <C>       
Balance Sheet Data
  Cash and cash equivalents       $3,057,412   $1,277,060   $  877,501   $  419,826   $   17,859   $  429,409   $  145,455
  Total assets at book value       6,719,035    4,713,665    2,380,317    1,867,445    1,355,140    1,793,334    1,266,174
  Total assets at the value
    assigned for purposes of                                                                                     2,990,728
    roll-up transaction
  Total liabilities                  523,524       50,000           --           --           --           --           --
  General and limited
    partners' equity:
      Managing General Partner       137,695      291,366      386,815      436,921      111,441      462,867      126,832
      Participants                 6,053,875    4,363,866    1,978,692    1,429,384    1,240,417    1,329,209    1,134,106
      Special Limited Partners         3,941        8,433       14,810        1,140        3,282        1,258        5,236
                                  ----------   ----------   ----------   ----------   ----------   ----------   ----------
                                  $6,195,511   $4,663,665   $2,380,317   $1,867,445   $1,355,140   $1,793,334   $1,266,174
                                  ==========   ==========   ==========   ==========   ==========   ==========   ==========
Per Unit Balance Sheet Data(1)
  Book value                      $    4,309   $    3,106   $    1,408   $    1,017   $      883   $      946   $      807
  Value assigned for purpose of
    the roll-up transaction                                                                                          2,107
</TABLE>
    

(1)  Per unit data is based on indicated amounts allocable to limited partners
     divided by 1,405 limited partner units outstanding.

                                      122
<PAGE>   136

MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF 
OPERATIONS

General

        The 1990-1 Partnership was formed November 29, 1990 for the purpose of
investing in oil and natural gas activities by acquiring proven producing
properties, recompleting previously drilled wells and developing and drilling
new oil and gas wells. Benton Oil and Gas Company and a wholly owned subsidiary
are the Co-Managing General Partners, and as such, conduct, direct and exercise
full control over all activities of the Partnership.

        Oil and gas properties are accounted for using the successful efforts
methods. Under this method, costs of drilling exploratory wells are initially
capitalized pending determination of whether the well can produce proved
reserves. All costs relating to non-productive exploratory wells are expensed.
Costs relating to productive exploratory wells and all development wells are
capitalized and depleted on a unit-of-production basis over the life of the
remaining proved developed reserves. Delay rentals and geological and
geophysical costs are expensed as incurred.

        Under the terms of the 1990-1 Partnership Agreement, the participants
pay 99% of the lease acquisition, geophysical and seismic costs, well costs, and
organization and offering expenses, including commissions, while the Co-Managing
General Partners pay 1% of such costs. General and administrative expenses and
lease operating expenses are shared 74.25% by the participants and 25.75% by the
Co-Managing General Partners. Revenues and production taxes are allocated
73.5974% to the participants and 25.5236% to the Co-Managing General Partners
and 0.879% to broker/dealers who met certain minimum sales requirements in the
initial offering of the 1990-1 Units.

Results of Operations

   
        Six Months Ended June 30, 1995 and 1994. For the six months ended June
30, 1995, the 1990-1 Partnership had revenues of $235,273 compared to $280,792
for the same period in 1994, representing a decrease of 16%. This decrease was
primarily due to reduced oil sales quantities and lower gas prices related to
the Umbrella Point Field which were partially offset by increased gas sales
quantities in the field. The production for the six months ended June 30, 1995
was 6,879 Bbl of crude oil and condensate and 71,474 Mcf of natural gas compared
to production of 9,507 Bbl of crude oil and condensate and 59,966 Mcf of natural
gas for the comparable period in 1994. For the six months ended June 30, 1995,
crude oil and natural gas prices averaged $17.46 per Bbl and $1.60 per Mcf,
respectively, compared to $15.00 per Bbl and $2.22 per Mcf, respectively, during
the comparable period.
    

   
        Lease operating costs and production taxes for the period ended June 30,
1995 were $100,135, a decrease of 11% from $112,322 in the comparable period.
The decrease was primarily due to legal fees incurred in 1994 related to damage
to production facilities. Depletion, impairment and amortization expenses were
$153,641 for the period ended June 30, 1995, an increase of 35% from $113,834
for the comparable period primarily due to the impairment of the Umbrella Point
Field as a result of the proposed sale of the property. General and
administrative expenses were $67,323 for the period ended June 30, 1995, an
increase of 15% from $58,782 for the comparable period primarily due to
increased audit and tax preparation fees and costs related to the review of the
Partnership's reserves by an independent petroleum engineering firm.
    

                                      123
<PAGE>   137

   
        For the reasons discussed above, the net loss for the six months ended
June 30, 1995 was $88,966, compared to a loss of $9,478 for the period ended
June 30, 1994.
    

   
        Years Ended December 31, 1994 and 1993. For the year ended December 31,
1994, the 1990-1 Partnership had total revenues of $524,786 compared to $645,459
for the same period in 1993, representing a decrease of 19%, primarily due to
reduced oil and gas sales quantities combined with reduced oil and gas prices.
The production for the year ended December 31, 1994 was 17,179 Bbl of crude oil
and condensate and 127,779 Mcf of natural gas compared to production of 18,518
Bbl of crude oil and condensate and 146,746 Mcf of natural gas for the
comparable period in 1993. For the year ended December 31, 1994, crude oil and
natural gas prices averaged $15.83 per Bbl and $1.93 per Mcf, respectively,
compared to $17.31 per Bbl and $2.11 per Mcf, respectively, during the
comparable period.
    

   
        Lease operating costs and production taxes for the year ended December
31, 1994 were $263,957, an increase of 4% from $254,903 in the comparable
period. A significant portion of the Partnership's lease operating expenses are
associated with fixed rather than variable costs such as contract pumping
services and equipment rentals. While certain variable costs decreased as oil
and gas sales quantities decreased during the period, other non-variable costs
increased resulting in an aggregate increase of $9,054 or 4% during 1994
compared to 1993. Depletion, impairment and amortization expenses were $224,635
for the year ended December 31, 1994, an increase of 19% from $189,309 for the
comparable period primarily due to impairment of the West Cote Blanche Bay
Field. General and administrative expenses were $78,547 for the year ended
December 31, 1994, a decrease of 21% from $99,967 for the comparable period
primarily due to the sale at a gain of marketable equity securities in 1994
which had been written down to approximate market value in 1993 and reduced
third party administrative support costs.
    

        For the reasons discussed above, the net loss for the year ended
December 31, 1994 was $48,960, compared to net income of $91,710 for the year
ended December 31, 1993.

        Years Ended December 31, 1993 and 1992. For the year ended December 31,
1993, the 1990-1 Partnership had total revenues of $645,459 compared to $770,517
for the same period in 1992, representing a decrease of 16%. This decrease was
primarily due to reduced oil and gas sales from the Umbrella Point and East
Cameron Fields due to the fields' natural production decline and sales of the
Round Mountain and Hopper Canyon properties. The production for the years ended
December 31, 1993 was 18,518 Bbl of crude oil and condensate and 146,746 Mcf of
natural gas compared to production of 26,184 Bbl of crude oil and condensate and
145,477 Mcf of natural gas for the comparable period in 1992. For the year ended
December 31, 1993, crude oil and natural gas prices averaged $17.31 per Bbl and
$2.11 per Mcf, respectively, compared to $18.20 per Bbl and $1.78 per Mcf,
respectively, during the comparable period.

        Lease operating costs and production taxes for the year ended December
31, 1993 were $254,903, a decrease of 11% from $285,840 in the comparable
period. Depletion, impairment and amortization expenses were $189,309 for the
year ended December 31, 1993, compared to $1,560,665 for the same period in
1992, representing a decrease of 88%. This decrease was primarily due to the
impairment of the Round Mountain Field in 1992 as a result of its sale and the
complete depletion of the East Cameron Field in 1992. These decreases were
partially offset by increased depletion of the Umbrella Point Field in 1993 due
to downward revisions to oil and gas reserves during the year. General and
administrative expenses for the year ended December 31, 1993 were $99,967, an
increase of 44% from $69,510 in the comparable period, primarily related to
increased professional fees.

                                      124
<PAGE>   138

        For the reasons discussed above, the net income for the year ended
December 31, 1993 was $91,710, compared to net loss of $1,212,036 for the year
ended December 31, 1992.

Capital Resources and Liquidity

        The oil and gas industry is a highly capital intensive business. The
Partnership requires capital principally to fund the following costs: (i)
drilling and completion costs of wells and the cost of production and
transportation facilities; (ii) purchase of leases and other interests in oil
and gas producing properties; and (iii) general and administrative expenses. The
amount of available capital significantly effects the scope of the Partnership's
operations.

        In June 1995, the Partnership entered into an agreement to sell its
principal remaining oil and gas properties (see Note 4 to the 1990-1 Partnership
Financial Statements). Assuming the sale is completed, the Partnership will have
very limited remaining oil and gas activities. If the sale is not completed, the
properties have a remaining economic life of approximately 5.5 years.

Effects of Inflation and Changing Prices

        The 1990-1 Partnership's results of operations and cash flow are
affected by changing oil and gas prices. If the price of oil and gas increases,
there could be a corresponding increase in the cost to the Partnership for
drilling and related services as well as an increase in revenues. To date,
inflation has had a minimal effect on the Partnership.

                                      125
<PAGE>   139

                    INFORMATION CONCERNING 1991-1 PARTNERSHIP

GENERAL

        Objectives. The 1991-1 Partnership is a limited partnership which was
formed to invest in oil and natural gas activities by primarily acquiring proven
producing properties that have additional development potential, recompleting
previously drilled wells and drilling new wells. The primary financial objective
of the 1991-1 Partnership is to make quarterly distributions to its Investors
from available cash flow while replacing and expanding its reserves on a
cost-effective basis. The Partnership made regular cash distributions to
partners through August 1994, but has not made subsequent cash distributions due
to declining oil and gas production combined with higher lease operating costs
and production taxes, continued capital expenditures and lower natural gas
prices.

        Management. Benton Oil and Gas Company and a wholly-owned subsidiary,
Benton Oil and Gas Company of Louisiana, are the Co-Managing General Partners.
Benton makes all decisions regarding the business and operations of the 1991-1
Partnership, including development and other activities, and any sale of
properties and the acquisition of additional properties.

        The Managing General Partners receive 25.6438% of the oil and gas
revenues from the 1991-1 Partnership. In addition, Benton and its subsidiary own
2.8182 Units in the 1991-1 Partnership.

   
        The Co-Managing General Partners do not receive any management fees or
other fees from the 1991-1 Partnership. The 1991-1 Partnership pays the
Co-Managing General Partners for lease operating expenses, well costs and
general and administrative expenses incurred on behalf of the Partnership.
    

        Organization. Benton, as managing general partner and sponsor of the
1991-1 Partnership, sold an aggregate of $1,409,091 of 1991-1 Units. Of the net
proceeds raised of $1,055,886 which were available for partnership activities,
$927,510 was used in oil and gas activities of the Partnership, as contemplated
in the private placement memorandum for the offering, and the remaining proceeds
were distributed to the participants.

DESCRIPTION OF OIL AND GAS PROPERTIES

        The following table sets forth certain information as of January 1, 1995
related to the 1991-1 Partnership's interest in its oil and gas properties.

<TABLE>
<CAPTION>
                                                Proved Reserves at January 1, 1995                 1994 Production
                                                ----------------------------------                 ---------------
                                                                      Present Value of
                                                                    Estimated Future Net
                                                                    Cash Flows Discounted
Property                             Oil (Bbls)         Gas (Mcf)            at 10%            (Bbls)            (Mcf)
- --------                             ----------         ---------   ---------------------      ------            ------
<S>                                    <C>               <C>                <C>                 <C>              <C>   
Umbrella Point Field                   13,832            104,982            $186,589            3,127            17,148
West Cote Blanche Bay Field               264             26,356              23,856              293             2,667
                                       ------            -------            --------            -----            ------
         TOTAL                         14,096            131,338            $210,445            3,420            19,815
                                       ======            =======            ========            =====            ======
</TABLE>

        Additional information regarding these fields is set forth below.

                                      126
<PAGE>   140

        Umbrella Point Field. The Umbrella Point Field is located in State
Tracts 74 and 87, which consist of 1,280 acres in the northern end of Upper
Galveston Bay, in Texas state waters. Sun Oil Co. discovered the field in May,
1957. Oil and gas production is from fifteen stacked Frio sands ranging in depth
from the F-1 sand at 7,612 feet to the F-15 sand at 8,994 feet. The 1991-1
Partnership acquired a 2.83% working interest in the Umbrella Point Field from
the 1990-1 Partnership for $373,205 prior to closing adjustments. As of
September 1995, the Umbrella Point Field had 10 wells producing at combined
average daily rates of 312 Bbl of oil and 3.1 MMcf of natural gas.

        West Cote Blanche Bay Field. The West Cote Blanche Bay Field is located
on 5,892 acres in a shallow bay in St. Mary Parish, Louisiana, approximately 125
miles southwest of New Orleans with water depths averaging seven to eight feet.
The field was discovered in 1938 by Texaco, which continues to operate the
field. More than 300 separate oil and gas reservoirs have been identified by
Texaco and the Company from a total of approximately 680 wellbores in 180
different sandstone formations, at depths from 1,700 to 13,000 feet. The 1991-1
Partnership purchased a 0.06% working interest in the West Cote Blanche Bay
Field from the 1990-1 Partnership for $94,352 prior to closing adjustments. In
March 1995, the Partnership sold its 0.06% working interest in certain depths
(above approximately 10,575 feet) in the West Cote Blanche Bay Field for a
purchase price of $29,200. The 1991-1 Partnership has a 0.06% working interest
in three wells below the depth of approximately 10,575 feet. These wells are
currently producing at a combined rate of approximately 21 MMcf of natural gas
per day.

        The following is a description of properties the 1991-1 Partnership at
one time had an interest in but subsequently sold or abandoned.

        Hopper Canyon 12-1 Well. The Hopper Canyon 12-1 well is located in
Ventura County, California. This well was successfully drilled and completed in
the fourth quarter of 1991. The well produced at rates of approximately 24 Bbl
of oil and 45 MMcf of gas per day. However, Benton determined it was in the best
interest of the Partnership to sell its 38.0% working interest in the well. In
April 1992, the 1991-1 Partnership sold its interest in the 12-1 well to Fortune
Petroleum. Proceeds from the sale were $17,881, consisting of $3,461 in cash and
stock of Fortune Petroleum with a fair market value of $14,420 (the stock was
subsequently sold in November 1994 with the 1991-1 Partnership receiving
$7,699). In addition, the 1991-1 Partnership retained a production payment of
$8,845 which was paid from monthly net income from the 12-1 well. The 1991-1
Partnership's cumulative expenditures on the Hopper Canyon 12-1 well were
$211,132.

        Prather 43-1 Well. This prospect was located in Acadia Parish,
Louisiana. This well was drilled to a total depth of approximately 11,000 feet.
It was determined to be uneconomical and was plugged and abandoned. The 1991-1
Partnership had a 17.5% working interest in this well with total cumulative
expenditures of $134,715.

SELECTED HISTORICAL FINANCIAL DATA

   
        The following selected financial data for the 1991-1 Partnership as of
and for each of the years in the four year period ended December 31, 1994 are
derived from the 1991-1 Partnership's audited financial statements. The selected
consolidated financial data for the six months ended June 30, 1994 and 1995 are
derived from the 1991-1 Partnership's unaudited financial statements. In the
opinion of management, such unaudited financial statements contain all
adjustments (consisting of only normal recurring accruals) necessary for a fair
presentation of the financial condition and results of operations as of and for
the periods presented. Operating results for the six months ended June 30, 1995
are not necessarily indicative of the results that may be expected for the
entire fiscal year ending December 31, 
    

                                      127
<PAGE>   141

1995. The selected financial data below should be read in conjunction with the
1991-1 Partnership's financial statements and related notes thereto and
Management's Discussion and Analysis of Financial Condition and Results of
Operations included elsewhere in this Prospectus.

   
<TABLE>
<CAPTION>
                                                                                                  Six Months Ended
                                     Inception to          Years Ended December 31                     June 30
                                     December 31     -------------------------------------     ----------------------
                                         1991          1992           1993          1994          1994         1995
                                         ----          ----           ----          ----          ----         ----
<S>                                  <C>             <C>           <C>           <C>           <C>          <C>      
Operating Data
  Total revenue                      $   108,288     $ 160,321     $ 112,524     $  98,644     $ 52,188     $  44,852
  Lease operating costs
   and production taxes                   54,069        40,093        36,276        38,002       14,599        12,553
  Exploration costs                      158,016         7,245         1,284           769          515           361
  Loss on sale of oil and
   gas properties                         61,225           225
  Depletion, impairment
   and amortization                      125,742        65,241        60,503        95,497       32,435       119,437
  General and administrative              20,925        28,876        45,195        28,823       25,981        30,500
                                     -----------     ---------     ---------     ---------     --------     ---------
   Net loss                          ($  250,464)    ($ 42,359)    ($ 30,734)    ($ 64,447)    ($21,342)    ($118,224)
                                     ===========     =========     =========     =========     ========     =========

  Net increase (decrease)
   in cash and cash equivalents      $ 1,233,019     ($955,826)    ($100,013)    ($117,010)    ($54,775)    $  22,377
  Net cash provided by
   (used in) operating activities         (7,849)       85,839        38,782        28,758       11,544         1,438
  Distributions                           27,900       111,600       115,292       127,205       56,546            --

Per Unit Operating Data(1)
  Net income (loss)                         (914)         (243)         (146)         (256)         (87)         (422)
  Distributions of earnings                   --            --            --            --           --            --
  Distributions representing a
   return of capital                         100           400           400           300          200            --
</TABLE>

<TABLE>
<CAPTION>
                                                         December 31                           June 30
                                     ----------------------------------------------    --------------------
                                        1991         1992        1993        1994        1994        1995
                                        ----         ----        ----        ----        ----        ----
<S>                                  <C>           <C>         <C>         <C>         <C>         <C>     
   Balance Sheet Data
     Cash and cash equivalents       $1,233,019    $277,193    $177,180    $ 60,170    $122,405    $ 82,547
     Total assets at book value       1,815,157     777,067     631,041     439,389     553,153     321,165
     Total assets at the value
       assigned for purposes of
       roll-up transaction              692,349
     Total liabilities                  884,131          --          --          --          --          --
     General and limited
       partners' equity:
         Managing General Partner        18,413      43,394      50,358      13,601      52,514      12,820
         Participants                   912,292     732,846     580,591     425,503     500,531     307,888
         Special Limited Partners           321         827          92         285         108         457
                                     ----------    --------    --------    --------    --------    --------
                                     $  931,026    $777,067    $631,041    $439,389    $553,153    $321,165
                                     ==========    ========    ========    ========    ========    ========

   Per Unit Balance Sheet Data(1)
     Book value                      $    3,270    $  2,627    $  2,081    $  1,525    $  1,794    $  1,104
     Value assigned for purpose
       of the roll-up transaction         2,456
</TABLE>
    

(1)  Per unit data is based on indicated amounts allocable to limited partners
     divided by 279 limited partner units outstanding.

                                      128
<PAGE>   142

MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF 
OPERATIONS

General

        The 1991-1 Partnership was formed for the purpose of investing in oil
and natural gas activities by acquiring proven producing properties,
recompleting previously drilled wells and developing and drilling new oil and
gas wells. Benton Oil and Gas Company and a wholly owned subsidiary are the
Co-Managing General Partners, and as such, conduct, direct and exercise full
control over all activities of the Partnership.

        Oil and gas properties are accounted for using the successful efforts
methods. Under this method, costs of drilling exploratory wells are initially
capitalized pending determination of whether the well can produce proved
reserves. All costs relating to non-productive exploratory wells are expensed.
Costs relating to productive exploratory wells and all development wells are
capitalized and depleted on a unit-of-production basis over the life of the
remaining proved developed reserves. Delay rentals and geological and
geophysical costs are expensed as incurred.

        Under the terms of the 1991-1 Partnership Agreement, the participants
pay 99% of the lease acquisition, geophysical and seismic costs, well costs, and
organization and offering expenses, including commissions, while the Co-Managing
General Partners pay 1% of such costs. For the first twelve months of the
Partnership, general and administrative expenses are covered by a fee, equal to
3% of the initial capital raised, paid by the Partnership to Benton. The fee is
paid 99% by the participants and 1% by the Co-Managing General Partners. General
and administrative expenses after the first twelve months and lease operating
expenses are shared 74.25% by the participants and 25.75% by the Co-Managing
General Partners. Revenues and production taxes are allocated 73.944% to the
participants and 25.6438% to the Co-Managing General Partners, and 0.4122% to
broker/dealers who met certain minimum sales requirements in the initial
offering of 1991-1 Units.

Results of Operations

   
        Six Months Ended June 30, 1995 and 1994. For the six months ended June
30, 1995, the 1991-1 Partnership had revenues of $44,852 compared to $52,188 for
the same period in 1994, representing a decrease of 14%. This decrease was
primarily due to reduced oil sales quantities and lower gas prices related to
the Umbrella Point Field which were partially offset by increased gas sales
quantities in the field. The production for the six months ended June 30, 1995
was 1,368 Bbl of crude oil and condensate and 12,039 Mcf of natural gas compared
to production of 1,893 Bbl of crude oil and condensate and 8,813 Mcf of natural
gas for the comparable period in 1994. For the six months ended June 30, 1995,
crude oil and natural gas prices averaged $17.79 per Bbl and $1.64 per Mcf,
respectively, compared to $16.01 per Bbl and $2.28 per Mcf, respectively, during
the comparable period.
    

   
        Lease operating costs and production taxes for the period ended June 30,
1995 were $12,553, a decrease of 14% from $14,599 in the comparable period. The
decrease was primarily due to legal fees incurred in 1994 related to damage to
production facilities. Depletion, impairment and amortization expenses were
$119,437 for the period ended June 30, 1995, an increase of 268% from $32,435
for the comparable period primarily due to the impairment of the Umbrella Point
Field as a result of the proposed sale of the property. General and
administrative expenses were $30,500 for the period ended June 30, 1995, an
increase of 17% from $25,981 for the comparable period primarily due to
increased 
    

                                      129
<PAGE>   143

   
audit and tax preparation fees and costs related to the review of the
Partnership's reserves by an independent petroleum engineering firm.
    

   
        For the reasons discussed above, the net loss for the six months ended
June 30, 1995 was $118,224, compared to a loss of $21,342 for the period ended
June 30, 1994.
    

        Years Ended December 31, 1994 and 1993. For the year ended December 31,
1994, the 1991-1 Partnership had total revenues of $98,644 compared to $112,524
for the same period in 1993, representing a decrease of 12%, primarily due to
price decreases. The production for the year ended December 31, 1994 was 3,420
Bbl of crude oil and condensate and 19,815 Mcf of natural gas compared to
production of 3,686 Bbl of crude oil and condensate and 18,256 Mcf of natural
gas for the comparable period in 1993. For the year ended December 31, 1994,
crude oil and natural gas prices averaged $16.83 per Bbl and $1.94 per Mcf,
respectively, compared to $18.14 per Bbl and $2.21 per Mcf, respectively, during
the comparable period.

   
        Lease operating costs and production taxes for the year ended December
31, 1994 were $38,002, an increase of 5% from $36,276 in the comparable period.
A significant portion of the Partnership's lease operating expenses are
associated with fixed rather than variable costs such as contract pumping
services and equipment rentals. Costs increased by $1,726 or 5% during 1994
compared to 1993. Depletion, impairment and amortization expenses were $95,497
for the year ended December 31, 1994, an increase of 58% from $60,503 for the
comparable period primarily due to impairment of the West Cote Blanche Bay
Field. General and administrative expenses were $28,823 for the year ended
December 31, 1994, a decrease of 36% from $45,195 for the comparable period
primarily due to the sale at a gain of marketable equity securities in 1994
which had been written down to approximate market value in 1993 and reduced
third party administrative support costs.
    

        For the reasons discussed above, the net loss for the year ended
December 31, 1994 was $64,447, compared to net loss of $30,734 for the period
ended December 31, 1993.

        Years Ended December 31, 1993 and 1992. For the year ended December 31,
1993, the 1991-1 Partnership had total revenues of $112,524 compared to $160,321
for the same period in 1992, representing a decrease of 30%. This decrease was
primarily due to reduced oil and gas sales from the Umbrella Point and West Cote
Blanche Bay Fields due to the fields' natural production decline and sale of the
Hopper Canyon property. The production for the year ended December 31, 1993 was
3,686 Bbl of crude oil and condensate and 18,256 Mcf of natural gas compared to
production of 4,727 Bbl of crude oil and condensate and 19,222 Mcf of natural
gas for the comparable period in 1992. For the year ended December 31, 1993,
crude oil and natural gas prices averaged $18.14 per Bbl and $2.21 per Mcf,
respectively, compared to $20.02 per Bbl and $1.84 per Mcf, respectively, during
the comparable period.

   
        Lease operating costs and production taxes for the year ended December
31, 1993 were $36,276, a decrease of 10% from $40,093 in the comparable period.
Depletion, impairment and amortization expenses were $60,503 for the year ended
December 31, 1993, compared to $65,241 for the same period in 1992, representing
a decrease of 7% primarily due to the increased depletion of the Umbrella Point
Field in 1993 as a result of downward revisions to oil and gas reserves during
the year. The increase was partially offset, however, by the sale of the Hopper
Canyon property in 1992. General and administrative expenses for the year ended
December 31, 1993 were $45,195, an increase of 57% from $28,876 in the
comparable period, primarily related to increased professional fees.
    

                                      130
<PAGE>   144

        For the reasons discussed above, the net loss for the year ended
December 31, 1993 was $30,734, compared to net loss of $42,359 for the year
ended December 31, 1992.

Capital Resources and Liquidity

        The oil and gas industry is a highly capital intensive business. The
Partnership requires capital principally to fund the following costs: (i)
drilling and completion costs of wells and the cost of production and
transportation facilities; (ii) purchase of leases and other interests in oil
and gas producing properties; and (iii) general and administrative expenses. The
amount of available capital significantly effects the scope of the Partnership's
operations.

        In June 1995, the Partnership entered into an agreement to sell its
principal remaining oil and gas properties (see Note 4 to the 1991-1 Partnership
Financial Statements). Assuming the sale is completed, the Partnership will have
very limited remaining oil and gas activities. If the sale is not completed, the
properties have a remaining economic life of approximately 2.5 years.

Effects of Inflation and Changing Prices

        The 1991-1 Partnership's results of operations and cash flow are
affected by changing oil and gas prices. If the price of oil and gas increases,
there could be a corresponding increase in the cost to the Partnership for
drilling and related services as well as an increase in revenues. To date,
inflation has had a minimal effect on the Partnership.

                                      131
<PAGE>   145

                            DESCRIPTION OF SECURITIES

        Benton is authorized to issue 40,000,000 shares of Common Stock and
5,000,000 shares of Preferred Stock.

        Common Stock. The holders of Common Stock are entitled to one vote per
share for each share held of record on all matters submitted to a vote of the
stockholders and are entitled to receive ratably such dividends as are declared
by the Board of Directors out of funds legally available therefor. In the event
of liquidation, dissolution or winding up of Benton, holders of the Common Stock
have the right to a ratable portion of the assets remaining after payment of
liabilities and liquidation preferences of any outstanding shares of Preferred
Stock. The holders of Common Stock have no preemptive rights or rights to
convert their Common Stock into other securities and are not subject to future
calls or assessments by Benton. All outstanding shares of Common Stock are fully
paid and nonassessable. All shares of Common Stock to be issued in connection
with the Sale will be fully paid and nonassessable.

        Preferred Stock. The Board of Directors may, without further action of
the stockholders, issue Preferred Stock in one or more series and fix rights and
preferences thereof, including dividend rights, dividend rates, conversion
rights, voting rights, terms of redemption, redemption price or prices,
liquidation preferences and the number of shares constituting any series or the
designation of such series (provided that the Board of Directors has no
authority to issue more than 5,000,000 shares of Preferred Stock). No shares of
Preferred Stock are currently outstanding.

        The rights of the holders of Common Stock will be subject to, and may be
adversely affected by, the rights of the Preferred Stock, which while providing
desirable flexibility in achieving corporate objectives, could have the effect
of making it more difficult for a person to acquire, or of discouraging a person
from acquiring, a majority of the voting stock of Benton.

   
        Warrants. The Warrants entitle the holder to purchase one share of
Benton Common Stock for each Warrant at an exercise price, payable in cash, of
$11.00 per share, subject to adjustment in certain circumstances. The holders of
Warrants have no rights as stockholders of Benton. The Warrants will be issued
pursuant to the terms of the Warrant Agreement, the form of which is attached
hereto as Exhibit A, and will expire three years from the date of issuance. The
number of shares of Common Stock and the exercise price of the Warrants is
subject to adjustment under certain circumstances described in the Warrant
Agreement, including issuance of Common Stock or securities convertible into
Common Stock to all holders of Benton Common Stock, exchange of Common Stock of
Benton for other securities, issuance of Common Stock or other securities to all
holders upon merger, reorganization or sale of assets. The Warrants are not
subject to redemption or call by Benton. If the Exchange Offer is accepted by
more than 75% of the holders of the 1989-1 Units, the 1990-1 Units and the
1991-1 Units, Benton will issue to all holders of such Units, Warrants to
purchase an aggregate of 592,373 shares of Common Stock.
    

   
        Pursuant to the terms of other common stock purchase warrants and
warrant agreements, Benton has issued common stock purchase warrants, on various
terms and for exercise prices ranging from $7.30 per share to $17.09 per share.
As of September 22, 1995, there were common stock purchase warrants to purchase
an aggregate of 1,919,752 shares of Common Stock issued and outstanding.
    

                                      132
<PAGE>   146

                                  LEGAL MATTERS
   

        The validity of the Securities to be issued pursuant to the Exchange
Offer will be passed upon for Benton, and certain federal income tax matters
related to the Exchange Offer will be passed upon for Benton, by Emens, Kegler,
Brown, Hill & Ritter, Co., L.P.A., Columbus, Ohio.
    

                                     EXPERTS

        The consolidated financial statements of Benton and the financial
statements of the 1989-1 Partnership, the 1990-1 Partnership and the 1991-1
Partnership as of December 31, 1994 and 1993 and for each of the three years in
the period ended December 31, 1994 included in this Prospectus have been audited
by Deloitte & Touche LLP, independent auditors, as stated in their reports
appearing herein and have been so included in reliance upon the reports of such
firm given upon their authority as experts in accounting and auditing.

        The information appearing herein, and incorporated herein by reference,
with respect to proved oil and gas reserves of Benton at December 31, 1992, 1993
and 1994, to the extent stated herein, was estimated by Benton and audited by
Huddleston & Co., Inc., independent petroleum engineers, and is included herein
on the authority of such firm as experts in petroleum engineering.

        The information appearing herein with respect to proved oil and gas
reserves of the 1989-1 Partnership at December 31, 1992, 1993 and 1994, to the
extent stated herein, was estimated by Benton and audited by Huddleston & Co.,
Inc., independent petroleum engineers, and is included herein on the authority
of such firm as experts in petroleum engineering.

        The information appearing herein with respect to proved oil and gas
reserves of the 1990-1 Partnership at December 31, 1992, 1993 and 1994, to the
extent stated herein, was estimated by Benton and audited by Huddleston & Co.,
Inc., independent petroleum engineers, and is included herein on the authority
of such firm as experts in petroleum engineering.

        The information appearing herein with respect to proved oil and gas
reserves of the 1991-1 Partnership at December 31, 1992, 1993 and 1994, to the
extent stated herein, was estimated by Benton and audited by Huddleston & Co.,
Inc., independent petroleum engineers, and is included herein on the authority
of such firm as experts in petroleum engineering.

                                      133
<PAGE>   147
                                    GLOSSARY

        When the following terms are used in the text they have the meanings
indicated.

        MCF. "Mcf" means thousand cubic feet. "MMcf" means million cubic feet.
"Bcf" means billion cubic feet. "Tcf" means trillion cubic feet.

        BBL. "Bbl" means barrel. "MBbl" means thousand barrels. "MMBbl" means
million barrels. "BBbl" means billion barrels.

        BOE. "BOE" means barrels of oil equivalent, which are determined using
the ratio of one barrel of crude oil, condensate or natural gas liquids to six
Mcf of natural gas so that six Mcf of natural gas is referred to as one barrel
of oil equivalent or "BOE." "MBOE" means thousands of barrels of oil equivalent.
"MMBOE" means millions of barrels of oil equivalent.

        CAPITAL EXPENDITURES. "Capital Expenditures" means costs associated with
exploratory and development drilling (including exploratory dry holes);
leasehold acquisitions; seismic data acquisitions; geological, geophysical and
land-related overhead expenditures; delay rentals; producing property
acquisitions; and other miscellaneous capital expenditures.

        COMPLETION COSTS. "Completion Costs" means, as to any well, all those
costs incurred after the decision to complete the well as a producing well.
Generally, these costs include all costs, liabilities and expenses, whether
tangible or intangible, necessary to complete a well and bring it into
production, including installation of service equipment, tanks and other
materials necessary to enable the well to deliver production.

        DEVELOPMENT WELL. A "Development Well" is a well drilled as an
additional well to the same reservoir as other producing wells on a lease, or
drilled on an offset lease not more than one location away from a well producing
from the same reservoir.

        EXPLORATORY WELL. "An "Exploratory Well" is a well drilled in search of
a new and as yet undiscovered pool of oil or gas, or to extend the known limits
of a field under development.

        FINDING COSTS. "Finding Cost," expressed in dollars per BOE, is
calculated by dividing the amount of total capital expenditures incurred related
to acquisitions, exploration and development costs (reduced by proceeds from any
sale of oil and gas properties) by the amount of total net reserves added or
reduced as a result of property acquisitions and sales, drilling activities and
reserve revisions during the same period.

        FUTURE DEVELOPMENT COST. "Future Development Cost" of proved
non-producing reserves, expressed in dollars per BOE, is calculated by dividing
the amount of future capital expenditures related to development properties by
the amount of total proved non-producing reserves associated with such
activities.

        GROSS ACRES OR WELLS. "Gross Acres or Wells" are the total acres or
wells, as the case may be, in which an entity has an interest, either directly
or through an affiliate.

                                      134
<PAGE>   148

        LIFTING COSTS. "Lifting Costs" are the expenses of lifting oil from a
producing formation to the surface, consisting of the costs incurred to operate
and maintain wells and related equipment and facilities, including labor costs,
repair and maintenance, supplies, insurance, production, severance and windfall
profit taxes.

        MMBTU. "MMBtu" means one million British thermal units. A British
thermal unit is the amount of heat needed to raise the temperature of one pound
of water one degree Fahrenheit.

        NET ACRES OR WELLS. A party's "Net Acre" or "Net Wells" are calculated
by multiplying the number of gross acres or gross wells in which that party has
an interest by the fractional interest of the party in each such acre or well.

        OIL AND GAS LEASE. An "Oil and Gas Lease" is an agreement whereby the
grantee receives for a period of time the full or partial interest in oil and
gas properties, oil and gas mineral rights, fee rights or other rights of the
grantor granting the grantee the right to drill for, produce and sell oil and
gas upon payment of rentals, bonuses and/or royalties. Oil and Gas Leases are
generally acquired from private landowners and federal and state governments.

        PRODUCING PROPERTIES OR RESERVES. "Producing Reserves" are Proved
Developed Behind-Pipe Reserves expected to be produced from existing completion
intervals now open for production in existing wells. "Producing Properties" are
properties to which Producing Reserves have been assigned by an independent
petroleum engineer.

        PROVED DEVELOPED BEHIND-PIPE RESERVES. "Proved Developed Reserves" are
Proved Reserves which can be expected to be recovered from new wells on
undrilled acreage, or from existing wells where a relatively major expenditure
is required for recompletion.

        RESERVES. "Reserves" means crude oil and natural gas, condensate and
natural gas liquids, which are net of leasehold burdens, are stated on a net
revenue interest basis, and are found to be commercially recoverable.

        ROYALTY INTEREST. "A Royalty Interest" is an interest in an oil and gas
property entitling the owner to a share of oil and gas production (or the
proceeds of the sale thereof) free of the costs of production.

        STANDARDIZED MEASURE OF DISCOUNTED FUTURE NET CASH FLOWS, BEFORE
PROVISION FOR INCOME TAXES. The "Standardized measure of discounted future net
cash flows, before provision for income taxes" is a method of determining the
present value of Proved Reserves. Future net revenues from Proved Reserves are
estimated assuming that oil and gas prices and production and development costs
remain constant. The resulting stream of revenues, before provision for income
taxes, is then discounted at the rate of 10% per year to obtain a present value.
Sometimes referred to herein as "PV10".

        3-D SEISMIC. "3-D Seismic" is the method by which a three dimensional
image of the earth's subsurface is created through the interpretation of
aerially collected seismic data. 3-D surveys allow for a more detailed
understanding of the subsurface than do conventional surveys and contributed
significantly to field appraisal, development and production.

        UNDEVELOPED ACREAGE. "Undeveloped Acreage" is oil and gas acreage
(including, in applicable instances, rights in one or more horizons which may be
penetrated by existing wellbores, but which have not been tested) to which
Proved Reserves have not been assigned by independent petroleum engineers.

                                      135
<PAGE>   149

        WORKING INTEREST. A "Working Interest" is the operating interest under
an Oil and Gas Lease which gives the owner the right to drill, produce and
conduct operating activities on the property and a share of production, subject
to all royalties, overriding royalties and other burdens and to all costs of
exploration, development and operations and all risks in connection therewith.

        In this Prospectus, natural gas volumes are stated at the legal pressure
base of the state or area in which the reserves are located at 60 degrees
Fahrenheit.

                                      136
<PAGE>   150
 
                         INDEX TO FINANCIAL STATEMENTS
 
   
<TABLE>
<CAPTION>
                                                                                        PAGE
                                                                                        ----
<S>                                                                                     <C>
Index to Benton Oil and Gas Company and Subsidiaries Consolidated Financial
  Statements........................................................................     F-2
Index to Benton Oil & Gas Combination Partnership 1989-1, L.P. Financial
  Statements........................................................................    F-28
Index to Benton Oil & Gas Combination Partnership 1990-1, L.P. Financial
  Statements........................................................................    F-38
Index to Benton Oil & Gas Combination Partnership 1991-1, L.P. Financial
  Statements........................................................................    F-49
</TABLE>
    
 
                                       F-1
<PAGE>   151
 
              INDEX TO BENTON OIL AND GAS COMPANY AND SUBSIDIARIES
                       CONSOLIDATED FINANCIAL STATEMENTS
 
   
<TABLE>
<CAPTION>
                                                                                        PAGE
                                                                                        ----
<S>                                                                                     <C>
Independent Auditors' Report........................................................     F-3
Consolidated Balance Sheets at December 31, 1993 and 1994 and June 30, 1995.........     F-4
Consolidated Statements of Operations for the Years Ended December 31, 1992, 1993
  and 1994 and the Six Months Ended June 30, 1994 and 1995..........................     F-5
Consolidated Statements of Stockholders' Equity for the Years Ended December 31,
  1992, 1993 and 1994 and the Six Months Ended June 30, 1995........................     F-6
Consolidated Statements of Cash Flows for the Years Ended December 31, 1992, 1993
  and 1994 and the Six Months Ended June 30, 1994 and 1995..........................     F-7
Notes to Consolidated Financial Statements for the Years Ended December 31, 1992,
  1993 and 1994 and the Six Months Ended June 30, 1994 and 1995.....................     F-9
</TABLE>
    
 
                                       F-2
<PAGE>   152
 
                          INDEPENDENT AUDITORS' REPORT
 
Benton Oil and Gas Company
Carpinteria, California
 
     We have audited the accompanying consolidated balance sheets of Benton Oil
and Gas Company and subsidiaries as of December 31, 1994 and 1993, and the
related consolidated statements of operations, stockholders' equity, and cash
flows for each of the three years in the period ended December 31, 1994. These
financial statements are the responsibility of the Company's management. Our
responsibility is to express an opinion on these financial statements based on
our audits.
 
     We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
     In our opinion, such consolidated financial statements present fairly, in
all material respects, the financial position of Benton Oil and Gas Company and
subsidiaries as of December 31, 1994 and 1993, and the results of their
operations and their cash flows for each of the three years in the period ended
December 31, 1994 in conformity with generally accepted accounting principles.
 
Deloitte & Touche LLP
 
Los Angeles, California
March 31, 1995
 
                                       F-3
<PAGE>   153
 
                  BENTON OIL AND GAS COMPANY AND SUBSIDIARIES
 
                          CONSOLIDATED BALANCE SHEETS
 
   
<TABLE>
<CAPTION>
                                                           DECEMBER 31,
                                                   -----------------------------       JUNE 30,
                                                       1993             1994             1995
                                                   ------------     ------------     ------------
                                                                                     (UNAUDITED)
<S>                                                <C>              <C>              <C>
ASSETS
CURRENT ASSETS:
  Cash and cash equivalents......................  $ 36,308,118     $ 14,192,568     $ 25,416,122
  Restricted cash (Note 4).......................       300,000       19,550,000       19,550,000
  Accounts receivable:
     Accrued oil and gas revenue.................       940,618        9,357,782       11,412,303
     Joint interest and other (Note 12)..........     1,578,679        3,880,808        3,745,439
  Property held for sale (Note 2)................                     14,887,700          756,872
  Prepaid expenses and other.....................       333,263          563,839        1,903,825
                                                   ------------     ------------     ------------
          TOTAL CURRENT ASSETS...................    39,460,678       62,432,697       62,784,561
OTHER ASSETS.....................................     1,008,452        2,550,607        1,438,315
PROPERTY AND EQUIPMENT (Notes 1,2,3,5,10,11 and
  15):
  Oil and gas properties (full cost
     method -- costs of $11,975,615, $16,695,284
     and $13,383,439 excluded from amortization
     at December 31, 1993 and 1994 and June 30,
     1995, respectively).........................    77,079,977      116,209,554      150,552,235
  Furniture and fixtures.........................       673,848        1,439,484        1,948,965
                                                   ------------     ------------     ------------
                                                     77,753,825      117,649,038      152,501,200
  Accumulated depletion and depreciation.........    (9,587,983)     (20,071,223)     (26,514,848)
                                                   ------------     ------------     ------------
                                                     68,165,842       97,577,815      125,986,352
                                                   ------------     ------------     ------------
                                                   $108,634,972     $162,561,119     $190,209,228
                                                    ===========      ===========      ===========
LIABILITIES AND STOCKHOLDERS' EQUITY
CURRENT LIABILITIES:
  Accounts payable:
     Revenue distribution........................  $     10,289     $    594,782     $    866,461
     Trade and other.............................     3,542,355       11,426,105        9,591,452
  Accrued interest payable, payroll and related
     taxes.......................................       399,362        1,199,096        1,173,599
  Income taxes payable...........................                                       1,586,616
  Commercial paper and other short term
     borrowings (Note 4).........................     7,668,588       21,035,401       21,534,318
  Current portion of long term debt (Note 3).....     1,205,107        6,392,114        5,893,160
                                                   ------------     ------------     ------------
          TOTAL CURRENT LIABILITIES..............    12,825,701       40,647,498       40,645,606
LONG TERM DEBT (Note 3)..........................    11,788,374       31,911,164       53,268,253
MINORITY INTEREST (Note 11)......................                      1,743,660        3,486,233
COMMITMENTS AND CONTINGENCIES (Notes 3,5,10 and
  15)
STOCKHOLDERS' EQUITY (Notes 2,3,7,8,9 and 11):
  Preferred stock, par value $0.01 a share;
     authorized 5,000,000 shares; outstanding,
     none
  Common stock, par value $0.01 a share;
     authorized 40,000,000 shares; issued and
     outstanding 24,676,848, 24,899,848 and
     25,105,493 at December 31, 1993 and 1994 and
     June 30, 1995 respectively..................       246,768          248,998          251,054
  Additional paid-in capital.....................    91,639,606       92,921,115       94,317,797
  Accumulated deficit............................    (7,865,477)      (4,911,316)      (1,759,715)
                                                   ------------     ------------     ------------
          TOTAL STOCKHOLDERS' EQUITY.............    84,020,897       88,258,797       92,809,136
                                                   ------------     ------------     ------------
                                                   $108,634,972     $162,561,119     $190,209,228
                                                    ===========      ===========      ===========
</TABLE>
    
 
                See notes to consolidated financial statements.
 
                                       F-4
<PAGE>   154
 
                  BENTON OIL AND GAS COMPANY AND SUBSIDIARIES
 
                     CONSOLIDATED STATEMENTS OF OPERATIONS
 
   
<TABLE>
<CAPTION>
                                                                            SIX MONTHS ENDED JUNE 30,
                                         YEARS ENDED DECEMBER 31,
                                  ---------------------------------------   -------------------------
                                     1992          1993          1994          1994          1995
                                  -----------   -----------   -----------   -----------   -----------
                                                                            (UNAUDITED)
<S>                               <C>           <C>           <C>           <C>           <C>
REVENUES
  Oil and gas sales (Notes 14
     and 15)....................  $ 8,209,134   $ 7,222,310   $31,942,810   $11,168,872   $24,829,260
  Net gain (loss) on exchange
     rates......................                   (206,481)    1,445,307       449,487       118,786
  Investment earnings...........      185,094       393,843     1,180,824       513,579       873,521
  Partnership fees,
     reimbursements and other...      227,881        94,124       135,865        28,087        48,829
                                  -----------   -----------   -----------   -----------   -----------
                                    8,622,109     7,503,796    34,704,806    12,160,025    25,870,396
                                  -----------   -----------   -----------   -----------   -----------
EXPENSES
  Lease operating costs and
     production taxes...........    4,413,620     5,110,264     9,531,264     3,948,268     5,287,071
  Depletion, depreciation and
     amortization...............    3,041,375     2,632,924    10,298,112     3,421,035     6,473,402
  General and administrative....    2,245,236     2,631,445     5,241,295     2,444,769     3,883,606
  Interest......................    1,831,213     1,957,753     3,887,961     1,596,693     3,361,041
                                  -----------   -----------   -----------   -----------   -----------
                                   11,531,444    12,332,386    28,958,632    11,410,765    19,005,120
                                  -----------   -----------   -----------   -----------   -----------
INCOME (LOSS) BEFORE INCOME
  TAXES AND MINORITY INTEREST...   (2,909,335)   (4,828,590)    5,746,174       749,260     6,865,276
INCOME TAX EXPENSE (Note 6).....                                  697,802                   1,971,102
                                  -----------   -----------   -----------   -----------   -----------
INCOME (LOSS) BEFORE MINORITY
  INTEREST......................   (2,909,335)   (4,828,590)    5,048,372       749,260     4,894,174
MINORITY INTEREST (Note 11).....                                2,094,211       747,597     1,742,573
                                  -----------   -----------   -----------   -----------   -----------
NET INCOME (LOSS)...............  $(2,909,335)  $(4,828,590)  $ 2,954,161   $     1,663   $ 3,151,601
                                   ==========    ==========    ==========    ==========    ==========
NET EARNINGS (LOSS) PER COMMON
  SHARE
  (Note 13).....................  $     (0.22)  $     (0.26)  $      0.12   $      0.00   $      0.12
                                   ==========    ==========    ==========    ==========    ==========
</TABLE>
    
 
                See notes to consolidated financial statements.
 
                                       F-5
<PAGE>   155
 
                  BENTON OIL AND GAS COMPANY AND SUBSIDIARIES
 
                CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
                  YEARS ENDED DECEMBER 31, 1994, 1993 AND 1992
   
                 AND (UNAUDITED) SIX MONTHS ENDED JUNE 30, 1995
    
 
   
<TABLE>
<CAPTION>
                                            COMMON                ADDITIONAL
                                            SHARES      COMMON      PAID-IN     ACCUMULATED
                                            ISSUED      STOCK       CAPITAL       DEFICIT        TOTAL
                                          ----------   --------   -----------   -----------   -----------
<S>                                       <C>          <C>        <C>           <C>           <C>
Balance at January 1, 1992..............  10,307,214   $103,072   $20,233,054   $  (127,552)  $20,208,574
Issuance of common shares:
  Exercise of warrants..................      10,000        100        17,900                      18,000
  Exercise of stock options.............   1,354,520     13,545     2,400,996                   2,414,541
  Acquisitions..........................     221,790      2,218     2,243,920                   2,246,138
  Sale of common stock..................   5,196,785     51,968    27,924,850                  27,976,818
  Redeemable common stock...............     351,088      3,511       180,919                     184,430
Compensation expense attributed to stock
  options...............................                              329,103                     329,103
Net loss for the year...................                                         (2,909,335)   (2,909,335)
                                          ----------   --------   -----------   -----------   -----------
Balance at December 31, 1992............  17,441,397    174,414    53,330,742    (3,036,887)   50,468,269
Issuance of common shares:
  Exercise of warrants..................       2,500         25        18,225                      18,250
  Exercise of stock options.............     284,211      2,842       540,490                     543,332
  Sale of common stock..................   7,000,000     70,000    35,585,406                  35,655,406
  Redeemable common stock...............                            2,022,323                   2,022,323
Retirement of stock.....................     (51,260)      (513)                                     (513)
Compensation expense attributed to stock
  options...............................                              142,420                     142,420
Net loss for the year...................                                         (4,828,590)   (4,828,590)
                                          ----------   --------   -----------   -----------   -----------
Balance at December 31, 1993............  24,676,848    246,768    91,639,606    (7,865,477)   84,020,897
Issuance of common shares:
  Exercise of stock options.............      23,000        230        83,509                      83,739
  Acquisitions..........................     200,000      2,000     1,198,000                   1,200,000
Net income for the year.................                                          2,954,161     2,954,161
                                          ----------   --------   -----------   -----------   -----------
Balance at December 31, 1994............  24,899,848    248,998    92,921,115    (4,911,316)   88,258,797
Issuance of common shares:
  Exercise of stock options
     (unaudited)........................     127,902      1,279       610,459                     611,738
  Conversion of notes and debentures
     (unaudited)........................      77,743        777       786,223                     787,000
Net income for the period (unaudited)...                                          3,151,601     3,151,601
                                          ----------   --------   -----------   -----------   -----------
Balance at June 30, 1995 (unaudited)....  25,105,493   $251,054   $94,317,797   $(1,759,715)  $92,809,136
                                           =========   ========    ==========    ==========    ==========
</TABLE>
    
 
   
                See notes to consolidated financial statements.
    
 
                                       F-6
<PAGE>   156
 
                  BENTON OIL AND GAS COMPANY AND SUBSIDIARIES
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
 
   
<TABLE>
<CAPTION>
                                                                                                SIX MONTHS ENDED JUNE 30,
                                                          YEARS ENDED DECEMBER 31,
                                                 ------------------------------------------   -----------------------------
                                                     1992           1993           1994           1994             1995
                                                 ------------   ------------   ------------   ------------     ------------
                                                                                                       (UNAUDITED)
<S>                                              <C>            <C>            <C>            <C>              <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income (loss)..............................  $ (2,909,335)  $ (4,828,590)  $  2,954,161   $      1,663     $  3,151,601
Adjustments to reconcile net income (loss) to
  net cash provided by (used in) operating
  activities:
  Depletion, depreciation and amortization.....     3,041,375      2,632,924     10,298,112      3,421,035        6,473,402
  Compensation expense attributed to stock
    options....................................       329,103        142,420
  Net earnings from limited partnerships.......      (183,858)      (106,230)       (63,486)       (38,488)         (20,435)
  Loss on disposition of assets................                                                                      10,632
  Interest paid in stock.......................        44,649         20,145
  Minority interest in undistributed earnings
    of subsidiary..............................                                   2,094,211        747,597        1,742,573
  (Increase) decrease in accounts receivable...     1,628,823     (1,465,725)   (10,384,670)    (6,627,742)      (1,919,152)
  (Increase) decrease in prepaid expenses and
    other......................................        44,517       (288,217)       (84,905)        (4,937)      (1,339,986)
  Increase (decrease) in accounts payable......    (2,905,840)     1,759,747      7,974,335      5,324,484       (1,562,974)
  Increase (decrease) in accrued interest
    payable,
    payroll and related taxes..................      (114,151)       204,117        560,720        153,032          (25,497)
  Increase in income taxes payable.............                                                                   1,586,616
                                                 ------------   ------------   ------------   ------------     ------------
    TOTAL ADJUSTMENTS..........................     2,261,227      3,038,625     10,508,628      3,032,137        5,035,819
                                                 ------------   ------------   ------------   ------------     ------------
    NET CASH USED IN OPERATING ACTIVITIES......      (648,108)    (1,789,965)    13,462,789      3,033,800        8,187,420
                                                 ------------   ------------   ------------   ------------     ------------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Proceeds from sale of property and
    equipment..................................     2,965,820      7,822,120      5,803,215        128,113       14,708,863
  Additions of property and equipment..........   (13,951,247)   (26,169,581)   (38,403,322)   (17,896,570)     (27,130,397)
  Increase in restricted cash..................                     (300,000)   (19,250,000)   (22,000,000)
  Distributions from limited partnerships......       391,540         28,667        502,167          1,492
  Additions to investments in affiliates.......      (350,282)
  Payment for purchase of Benton-Vinccler, net
    of cash acquired...........................                                  (2,501,973)    (2,501,973)
                                                 ------------   ------------   ------------   ------------     ------------
    NET CASH PROVIDED BY (USED IN) INVESTING
      ACTIVITIES...............................   (10,944,169)   (18,618,794)   (53,849,913)   (42,268,938)     (12,421,534)
                                                 ------------   ------------   ------------   ------------     ------------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Proceeds from sale of common stock...........    29,276,567     36,120,000
  Direct offering costs........................      (982,114)      (464,594)
  Proceeds from exercise of stock options and
    warrants...................................     2,432,541        561,582         83,740         22,727          611,738
  Issuance of convertible subordinated
    debentures.................................     6,428,000
  Proceeds from issuance of notes payable......       404,776                    21,360,000                      22,040,000
  Proceeds from commercial paper and other
    short term borrowings......................                    7,668,588     23,217,775     23,060,188
  (Increase) decrease in other assets..........      (806,992)         3,460     (1,683,583)       (19,623)        (213,664)
  Payments on commercial paper, other short
    term borrowings and notes payable..........   (14,877,300)      (672,230)   (24,706,358)   (17,849,721)      (6,980,406)
  Deficiency payments on redeemable common
    stock......................................      (287,194)      (172,917)
                                                 ------------   ------------   ------------   ------------     ------------
    NET CASH PROVIDED BY FINANCING
      ACTIVITIES...............................    21,588,284     43,043,889     18,271,574      5,213,571       15,457,668
                                                 ------------   ------------   ------------   ------------     ------------
    NET INCREASE (DECREASE) IN CASH............     9,996,007     22,635,130    (22,115,550)   (34,021,567)      11,223,554
CASH AND CASH EQUIVALENTS AT BEGINNING OF
  PERIOD.......................................     3,676,981     13,672,988     36,308,118     36,308,118       14,192,568
                                                 ------------   ------------   ------------   ------------     ------------
CASH AND CASH EQUIVALENTS AT END OF PERIOD.....  $ 13,672,988   $ 36,308,118   $ 14,192,568   $  2,286,551     $ 25,416,122
                                                  ===========    ===========    ===========    ===========      ===========
SUPPLEMENTAL DISCLOSURES OF CASH FLOW
  INFORMATION:
  Cash paid during the period for interest
    expense....................................  $  1,483,585   $  1,838,848   $  3,299,189   $  1,136,493     $  3,215,165
                                                  ===========    ===========    ===========    ===========      ===========
  Cash paid during the period for income
    taxes......................................                                $    715,507   $    160,594     $    368,427
                                                  ===========    ===========    ===========    ===========      ===========
</TABLE>
    
 
                                       F-7
<PAGE>   157
 
      SUPPLEMENTAL SCHEDULE OF NONCASH INVESTING AND FINANCING ACTIVITIES:
 
   
     Costs of $314,123, incurred during the year ended December 31, 1991, which
were attributable to the public offering of the Company's common stock completed
in January 1992, and previously included in other assets, were offset against
gross proceeds received from the sale of stock during the year ended December
31, 1992.
    
 
   
     During the year ended December 31, 1992, the Company acquired interests in
oil and gas properties in exchange for 221,790 shares of the Company, valued at
$2,246,138 and a $529,197 reduction in the Company's joint interest account
receivable balance due from the seller.
    
 
   
     On July 7, 1992, the Company issued 351,088 shares of Redeemable common
stock in connection with refinancing of indebtedness in the amount of
$2,582,050. During the year ended December 31, 1992, 27,000 of these shares were
resold for net proceeds of $180,919, which were allocated $120,270 for
redemption, $44,649 for interest and $16,000 for costs of refinancing, and the
Company made cash payments of $319,081. During the year ended December 31, 1993,
272,828 shares of Redeemable common stock were resold for net proceeds to the
selling stockholders of $2,022,323, and the Company made cash payments of
$200,000, terminating the Company's guarantee obligation. The reduction was
allocated $2,002,178 for redemption and $20,145 for interest. On May 19, 1993,
the Company redeemed the remaining 51,260 shares at their par value of $.01 per
share.
    
 
   
     During the year ended December 31, 1992, the Company acquired $43,790 of
fixed assets through capital lease obligations and seller financing.
    
 
   
     During the year ended December 31, 1993, the Company converted $2,113,429
of accounts payable into a note payable and entered into capital lease
agreements for the purchase of furniture and fixtures in the amount of $79,521.
    
 
   
     On March 4, 1994, the Company acquired capital stock from Vinccler
representing an additional 30% ownership interest in Benton-Vinccler for $3
million in cash, $10 million in non-interest bearing notes payable (with a
present value of $9.2 million assuming a 10% interest rate) and 200,000 shares
of the Company's common stock. The excess of the purchase price over the net
book value of assets acquired was $13,880,100, which was allocated to oil and
gas properties.
    
 
   
     During the year ended December 31, 1994, the Company converted $143,658 of
accounts payable into a note payable, financed the purchase of computer
equipment in the amount of $105,000 and financed the purchase of oil and gas
equipment in the amount of $1,733,675.
    
 
   
     During the six months ended June 30, 1995, the Company financed the
purchase of oil and gas equipment in the amount of $7,029,985 and leased office
equipment in the amount of $54,473.
    
 
   
     During the six months ended June 30, 1995, $117,000 of the Company's 8%
convertible notes and $670,000 of the Company's 8% convertible debentures were
retired in exchange for 9,975 and 67,768 shares of the Company's common stock,
respectively.
    
 
                See notes to consolidated financial statements.
 
                                       F-8
<PAGE>   158
 
                  BENTON OIL AND GAS COMPANY AND SUBSIDIARIES
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
          YEARS ENDED DECEMBER 31, 1994, 1993 AND 1992 AND (UNAUDITED)
   
                    SIX MONTHS ENDED JUNE 30, 1995 AND 1994
    
 
NOTE 1 -- ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
  Organization
 
     Benton Oil and Gas Company (the "Company") engages in the exploration,
development, production and management of oil and gas properties.
 
     The Company and its subsidiary Benton Oil and Gas Company of Louisiana,
formerly Energy Partners, participate as the managing general partner of three
oil and gas limited partnerships formed during 1989 through 1991. Under the
provisions of the limited partnership agreements, the Company receives
compensation as stipulated therein, and functions as an agent for the
partnerships to arrange for the management, drilling, and operation of
properties, and assumes customary contingent liabilities for partnership
obligations.
 
     The consolidated financial statements include the accounts of the Company
and its subsidiaries. The Company's investments in limited partnerships, the
Russia joint venture ("GEOILBENT") and the Venezuela joint venture (through
December 31, 1993) are proportionately consolidated based on the Company's
ownership interest. Effective January 1, 1994, the Venezuela joint venture was
incorporated and, as a result of the Company's acquisition of additional capital
stock of such corporation (See Note 11), has been fully consolidated. All
material intercompany profits, transactions and balances have been eliminated.
 
  Cash and Cash Equivalents
 
     Cash equivalents include money market funds and short term certificates of
deposit with original maturity dates of less than three months.
 
  Accounts Receivable
 
     The Company's accounts receivable are considered fully collectible;
therefore, no allowance is considered necessary.
 
  Other Assets
 
     Other assets consist principally of costs associated with the issuance of
long term debt. Debt issue costs are amortized on a straight-line basis over the
life of the debt.
 
  Property and Equipment
 
   
     The Company follows the full cost method of accounting for oil and gas
properties. Accordingly, all costs associated with the acquisition, exploration,
and development of oil and gas reserves are capitalized as incurred, including
exploration overhead of $1,412,170, $1,736,678 and $1,696,330 for the years
ended December 31, 1992, 1993 and 1994, respectively and $784,268 and $1,090,375
for the six months ended June 30, 1994 and 1995, respectively. Only overhead
which is directly identified with acquisition, exploration or development
activities is capitalized. All costs related to production, general corporate
overhead and similar activities are expensed as incurred. The costs of oil and
gas properties are accumulated in cost centers on a country by country basis,
subject to a cost center ceiling (as defined by the Securities and Exchange
Commission).
    
 
   
     All capitalized costs of oil and gas properties (excluding unevaluated
property acquisition and exploration costs) and the estimated future costs of
developing proved reserves, are depleted over the estimated useful lives of the
properties by application of the unit-of-production method using only proved oil
and gas reserves. Depletion expense attributable to the United States cost
center for the years ended December 31, 1992, 1993 and 1994 was $2,937,887,
$2,142,133 and $4,247,304 ($5.71, $6.47 and $7.46 per equivalent barrel),
respectively and for the six months ended June 30, 1994 and 1995 was $1,364,783
and $1,389,665 ($6.51 and
    
 
                                       F-9
<PAGE>   159
 
                  BENTON OIL AND GAS COMPANY AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
   
$7.13 per equivalent barrel), respectively. Depletion expense attributable to
the Venezuelan cost center for the years ended December 31, 1993 and 1994 was
$229,080 and $4,998,213 ($1.43 and $1.98 per equivalent barrel), respectively
and for the six months ended June 30, 1994 and 1995 was $1,627,301 and
$4,147,913 ($1.77 and $1.99 per equivalent barrel), respectively. Depletion
expense attributable to the Russian cost center for the years ended December 31,
1993 and 1994 was $99,207 and $837,818 ($3.51 and $2.85 per equivalent barrel),
respectively and for the six months ended June 30, 1994 and 1995 was $322,175
and $785,008 ($3.42 and $2.87 per equivalent barrel), respectively. Depreciation
of furniture and fixtures is computed using the straight-line method, with
depreciation rates based upon the estimated useful life applied to the cost of
each class of property. Depreciation expense was $65,213, $123,623 and $185,336
for the years ended December 31, 1992, 1993 and 1994, respectively and $72,904
and $143,724 for the six months ended June 30, 1994 and 1995, respectively.
    
 
  Taxes on Income
 
     Deferred income taxes reflect the net tax effects, calculated at currently
effective rates, of (a) future deductible/taxable amounts attributable to events
that have been recognized on a cumulative basis in the financial statements and
(b) operating loss and tax credit carryforwards. A valuation allowance is
recorded, if necessary, to reduce net deferred income tax assets to the amount
expected to be recoverable.
 
  Foreign Currency
 
     Russia and Venezuela are considered highly inflationary economies.
Therefore, all foreign operations are remeasured in United States dollars and
any currency gains or losses are recorded in the statement of operations.
 
  Fair Value of Financial Instruments
 
     The Company's financial instruments consist primarily of cash, accounts
receivable and payable, commercial paper and other short-term borrowings and
debt instruments. In addition, in 1994 the Company entered into a commodity
hedge agreement (See Note 15). The book values of all financial instruments,
other than debt instruments, are representative of their fair values due to
their short-term maturity. The book values of the Company's debt instruments,
except the convertible subordinated debentures and notes, are considered to
approximate their fair values because the interest rates of these instruments
are based on current rates offered to the Company. Based on the last trading on
December 31, 1994, the convertible subordinated debentures had a fair value of
approximately $6,685,000. There is no active market for the convertible
subordinated notes. Based on discounting the future cash flows related to the
notes at interest rates currently offered to the Company, approximately 13%, the
notes would have a fair value of approximately $3,600,000 at December 31, 1994.
The fair value of the hedge agreement is the estimated amount the Company would
have to pay to terminate the agreement, taking into account current oil prices
and the current creditworthiness of the hedge counterparties. The estimated
termination cost associated with the hedge agreement at December 31, 1994 is
approximately $1,132,000.
 
  Interim Reporting
 
   
     In the opinion of the Company, the accompanying unaudited consolidated
financial statements contain all adjustments (consisting of only normal
recurring accruals) necessary to present fairly the financial position as of
June 30, 1995, and the results of operations for the six month periods ended
June 30, 1994 and 1995.
    
 
   
     The results of operations for the six month period ended June 30, 1995 are
not necessarily indicative of the results to be expected for the full year.
    
 
                                      F-10
<PAGE>   160
 
                  BENTON OIL AND GAS COMPANY AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 2 -- ACQUISITIONS AND SALES
 
     In February 1992, the Company sold its interests in its Colorado properties
for net proceeds of approximately $0.8 million. Proceeds of the sale were used
primarily to repay portions of the Company's long term debt.
 
     In March 1992, the Company acquired additional working interests in several
oil and gas properties in Louisiana, California and Texas in which the Company
already had an interest. The purchase price was approximately $2.7 million.
After giving effect to certain closing adjustments, including adjustment of
joint interest receivables, the Company issued 213,957 shares of common stock to
the seller as full consideration for the acquisition.
 
     In September 1992, the Company sold the majority of its interests in its
California properties for net proceeds of $2.1 million, which were used to repay
debt.
 
     In June 1993, the Company sold 50% of its interests in the Belle Isle and
Rabbit Island Fields in exchange for reimbursement of certain expenditures
incurred through the closing date plus the additional reimbursement of certain
future costs as incurred. As of December 31, 1994, $6.5 million of the Company's
costs have been reimbursed. Additionally, in May 1993, the Company sold its
interest in the South Scott Prospect in Lafayette Parish, Louisiana for $1.5
million. The proceeds from these sales were used for working capital purposes.
 
     In March 1994, the Company acquired capital stock from Vinccler
representing an additional 30% ownership interest in Benton-Vinccler for $3
million in cash, $10 million in non-interest bearing notes payable (with a
present value of $9.2 million assuming a 10% interest rate) payable in various
installments over 24 months and 200,000 shares of the Company's common stock.
The excess of the purchase price over the book value of the 30% interest was
allocated to oil and gas properties.
 
     In November 1994, the Company sold a 10.8% working interest (24.9% of the
Company's 43.3% working interest) in the West Cote Blanche Bay Field for
approximately $5.8 million and future consideration of up to $3.7 million.
 
     In March 1995, the Company sold its 32.5% working interest in certain
depths (above approximately 10,575 feet) in the West Cote Blanche Bay Field for
a purchase price of approximately $14.9 million. The sales price has been
reflected as property held for sale at December 31, 1994.
 
   
     In July 1995, the Company sold its interest in the Umbrella Point Field for
net proceeds of approximately $0.8 million. The proceeds from the sale will be
used for working capital purposes and have been reflected as property held for
sale at June 30, 1995.
    
 
                                      F-11
<PAGE>   161
 
                  BENTON OIL AND GAS COMPANY AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 3 -- LONG TERM DEBT
 
     Long term debt consists of the following:
 
   
<TABLE>
<CAPTION>
                                                             DECEMBER 31,
                                                      ---------------------------
                                                         1993            1994
                                                      -----------     -----------      JUNE 30,
                                                                                         1995
                                                                                      -----------
                                                                                      (UNAUDITED)
<S>                                                   <C>             <C>             <C>
Senior unsecured notes with interest at 13%. See
  description below.................................                                  $20,000,000
Senior unsecured notes with interest at 13%. See
  description below.................................                  $15,000,000      15,000,000
Revolving secured credit facility. Interest payments
  due quarterly beginning March 31, 1995. Principal
  payments due quarterly beginning March 31, 1997.
  See description below. ...........................                    5,000,000       5,000,000
Convertible subordinated debentures with interest at
  8%. See description below.........................  $ 6,428,000       6,428,000       5,758,000
Convertible subordinated notes with interest at 8%.
  See description below.............................    4,662,000       4,662,000       4,545,000
Non-interest bearing promissory notes payable with a
  face value of $6 million at December 31, 1994 and
  $2 million at June 30, 1995, discounted using a
  10% interest rate. The notes are due in various
  installments through January 1996. See Note 11....                    5,747,878       1,926,933
Vendor financing with interest at 13.5%. Principal
  and interest payments in monthly installments of
  $200,000. Unsecured...............................    1,703,082
Bank financing with interest at LIBOR plus 7.5%.
  Secured by certain GEOILBENT oil export proceeds.
  See description below.............................                    1,292,000       1,564,000
Vendor financing with interest ranging from 10.5 to
  13.5%. Principal and interest payments are due in
  varying installments through June 1997.
  Unsecured.........................................                                    5,200,106
Other -- various equipment purchases and leases with
  principal and interest payments due monthly from
  $180 to $3,916. Interest rates vary from 10.0% to
  16.91%. Notes and leases mature from August 1995
  to
  February 1998.....................................      200,399         173,400         167,374
                                                      -----------     -----------     -----------
                                                       12,993,481      38,303,278      59,161,413
Less current portion................................    1,205,107       6,392,114       5,893,160
                                                      -----------     -----------     -----------
                                                      $11,788,374     $31,911,164     $53,268,253
                                                       ==========      ==========      ==========
</TABLE>
    
 
   
     On June 30, 1995, the Company issued $20 million in senior unsecured notes
due June 30, 2007, with interest at 13% per annum, payable semi-annually on June
30 and December 31. Annual principal payments of $4 million are due on June 30
of each year beginning on June 30, 2003. Early payment of the notes could result
in a substantial prepayment penalty. The note agreement contains financial
covenants including a minimum ratio of current assets to current liabilities and
a maximum ratio of funded liabilities to net worth and to domestic and certain
Venezuelan oil and gas reserves. The note agreement also provides for
limitations on liens, additional indebtedness, certain capital expenditures,
dividends, sales of assets and mergers. Additionally, in connection with the
issuance of the notes, the Company issued warrants entitling the holder to
purchase 125,000 shares of common stock at $17.09 per share, subject to
adjustment in certain circumstances, that are exercisable on or before June 30,
2007.
    
 
                                      F-12
<PAGE>   162
 
                  BENTON OIL AND GAS COMPANY AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
     On September 30, 1994, the Company issued $15 million in senior unsecured
notes due September 30, 2002, with interest at 13% per annum. Interest is
payable semi-annually on March 30 and September 30 beginning March 30, 1995.
Annual principal payments of $3 million are due on September 30 of each year
beginning on September 30, 1998. Early payment of the notes could result in a
substantial prepayment penalty. The note agreement contains financial covenants
including a minimum ratio of current assets to current liabilities and a maximum
ratio of liabilities to net worth or domestic oil and gas reserves. The note
agreement also provides for limitations on liens, additional indebtedness,
certain capital expenditures, dividends, sales of assets and mergers.
Additionally, in connection with the issuance of the notes, the Company issued
warrants entitling the holder to purchase 250,000 shares of common stock at
$9.00 per share, subject to adjustment in certain circumstances, that are
exercisable on or before September 30, 2002.
 
     On December 27, 1994, the Company entered into a revolving secured credit
facility. Under the credit agreement, the Company may borrow up to $15 million,
with the initial available principal limited to $10 million, on a revolving
basis for two years, at which time the facility will become a term loan due
December 31, 1999. Borrowings under the credit agreement are secured in part by
mortgages on the Company's U.S. properties and in part by a guarantee provided
by the financial institution which arranged the credit facility. Interest on
borrowings under the credit agreement accrues, at the Company's option, at
either a floating rate (higher of prime rate plus 3% or the Federal Funds Rate
plus 5%) or a fixed rate (rate of interest at which deposits of dollars are
available to lender in the interbank eurocurrency market plus 4.5%). The
floating rate borrowings may be prepaid at any time without penalty and the
fixed rate borrowings may be repaid on the last day of an interest period
without penalty, or at the option of the Company during an interest period upon
payment of a make-whole premium. The credit agreement contains financial
covenants including a minimum ratio of current assets to current liabilities and
maximum ratio of liabilities to net worth or domestic oil and gas reserves, and
also provides for limitations on liens, dividends, sales of assets and mergers.
Additionally, in exchange for the credit enhancement, the arranging financial
institution and commercial bank received warrants entitling the holder to
purchase 50,000 shares of common stock at $12.00 per share, subject to
adjustment in certain circumstances, that are exercisable on or before December
2004, and the arranging institution receives a 5% net profits interest in the
Company's properties whose development is financed by the facility.
 
     In May 1992, the Company issued $6,428,000 aggregate principal amount of
publicly offered 8% Convertible Subordinated Debentures due May 1, 2002,
convertible at the option of the holder at 101.157 shares per $1,000 principal
amount with interest payments due May 1 and November 1. Net proceeds to the
Company were approximately $5,711,000 and were used primarily to repay certain
indebtedness. At the Company's option, it may redeem the debentures in whole or
in part at any time on or after May 1, 1994, at 105% of par plus accrued
interest, declining annually to par on May 1, 1999. The debentures also provide
that the holders can redeem their debentures following a change in control (as
defined) of the Company. The Company has the option to pay the repurchase price
in cash or shares of its common stock.
 
     In October 1991, the Company issued $4,662,000 aggregate principal amount
of privately placed 8% Convertible Subordinated Notes ("Notes") due October 1,
2001, convertible at the option of the note holder at 85.259 shares per $1,000
principal amount with interest payments due April 1 and October 1. Net proceeds
to the Company were approximately $4,237,000. At the Company's option it may
prepay the Notes in whole or in part at any time on or after October 1, 1993 at
105% of the principal amount plus accrued interest declining annually to the
principal amount on October 1, 1998. The Notes also provide that the holders can
redeem their Notes in cash following a change in control (as defined) of the
Company.
 
     In August 1994, GEOILBENT entered into an agreement with International
Moscow Bank for a $4 million loan with the following terms: 14 monthly payments,
interest at LIBOR plus 7.5%, with interest only payments for the first four
months and monthly principal and interest payments thereafter. In connection
with this agreement, the Company provided to International Moscow Bank a
guarantee of payment under
 
                                      F-13
<PAGE>   163
 
                  BENTON OIL AND GAS COMPANY AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
   
which the Company has agreed to pay such loan in full if GEOILBENT fails to make
the scheduled payments. At December 31, 1994, the Company's share of the
outstanding balance was $1.3 million. In March 1995, GEOILBENT's credit facility
with International Moscow Bank was expanded to $6 million, with interest only
payments for 3 months and monthly principal and interest payments thereafter.
The Company has similarly guaranteed this indebtedness, through which the
Company intends to fulfill substantially all of its remaining charter fund
contribution requirements. At June 30, 1995, the Company's share of the
outstanding balance was $1.6 million.
    
 
     The principal requirements for the long term debt outstanding at December
31, 1994 are due as follows for the years ending December 31:
 
<TABLE>
        <S>                                                               <C>
        1995............................................................  $ 6,392,114
        1996............................................................      801,378
        1997............................................................    1,686,100
        1998............................................................    4,667,020
        1999............................................................    4,666,666
        Subsequent Years................................................   20,090,000
                                                                          -----------
                                                                          $38,303,278
                                                                           ==========
</TABLE>
 
NOTE 4 -- COMMERCIAL PAPER AND OTHER SHORT TERM BORROWINGS
 
   
     In February 1994, Benton-Vinccler borrowed $15 million from Morgan Guaranty
Trust Company of New York ("Morgan Guaranty"). Benton-Vinccler subsequently
borrowed from the same bank an additional $7 million for working capital
requirements. Benton-Vinccler made a payment of $2.75 million in September 1994,
leaving a balance of $19.25 million. The credit facility is collateralized in
full by time deposits from the Company, bears interest at LIBOR plus  3/4%, and
is renewed on a monthly basis. The loan arrangement contains no restrictive
covenants and no financial ratio covenants.
    
 
   
     During the fourth quarter of 1994 and the first six months of 1995,
Benton-Vinccler acquired approximately $3.4 million of drilling and production
equipment from trading companies and suppliers under terms which include payment
within a 12-month period in monthly and quarterly installments at interest rates
from 6.7% to 10.75%. The outstanding balances related to these transactions at
both December 31, 1994 and June 30, 1995 were approximately $1.5 million.
    
 
   
     In June 1994, GEOILBENT entered into a payment advance agreement with NAFTA
Moscow, the export agency which markets GEOILBENT's oil production to purchasers
in Europe. The payment advance of $2.5 million against future oil shipments,
which bore an effective discount rate of 12%, was repaid through withholdings
from oil sales on a monthly basis through December 1994. During the quarter
ended March 31, 1995, GEOILBENT received $3.0 million in production payment
advances pursuant to a similar agreement with NAFTA Moscow containing similar
terms. At June 30, 1995, the Company's share of the outstanding liability was
approximately $0.5 million.
    
 
NOTE 5 -- COMMITMENTS AND CONTINGENCIES
 
     The state leases relating to the West Cote Blanche Bay Field, the portion
of the Belle Isle Field owned by Texaco and the Rabbit Island Field, were the
subject of litigation between Texaco and the State of Louisiana. The Company's
interests in the Fields, which include substantially all of the Company's
domestic reserves, were originally owned by Texaco under certain leases granted
by the State. Although the Company was not a party to this litigation, its
interests in the Fields were subject to the litigation. In February 1994, the
State and Texaco entered into a Global Settlement Agreement to settle all
disputes related to this litigation. As a result of this agreement, Texaco has
committed to certain acreage development and drilling obligations which may
 
                                      F-14
<PAGE>   164
 
                  BENTON OIL AND GAS COMPANY AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
   
affect the Company and certain of its Louisiana properties. The Company believes
that the settlement should have no effect on its proved reserves and should have
no material adverse effect on the Company.
    
 
   
     In the normal course of its business, the Company may periodically become
subject to actions threatened or brought by its investors or partners in
connection with the operation or development of its properties or the sale of
securities. Prior to 1992, the Company was engaged in the formation and
operation of oil and gas limited partnership interests. In 1992, the Company
ceased raising funds through such sales. In connection with its role as managing
general partner of certain limited partnerships, the Company may become subject
to actions brought by limited partners of these partnerships. Certain of such
limited partners have brought an action against the Company in connection with
the Company's operations of several of the limited partnerships in which it
acted as managing general partner. The plaintiffs seek actual and punitive
damages for alleged actions and omissions by the Company in operating the
partnerships and alleged misrepresentations made by the Company in selling the
limited partnership interests. The plaintiff's representative and the Company
have entered into an arbitration agreement to resolve these issues. The Company
is also a defendant in an action brought by investors in a series of
unaffiliated limited partnerships for whose general partner the Company provided
all or a substantial portion of the drilling prospects and drilled and operated
a number of wells. The plaintiffs allege that the Company aided the general
partner in misrepresentations, fraud and breaches of fiduciary duties, and seek
an unspecified amount of compensatory and punitive damages. The Company intends
to vigorously defend these actions and does not believe the claims raised are
meritorious. However, new developments could alter this conclusion at any time.
The Company will be forced to expend time and financial resources to defend or
resolve all such matters. The Company is also subject to ordinary litigation
that is incidental to its business. None of the above matters are expected to
have a material adverse effect on the Company.
    
 
     The Company's aggregate rental commitments and related sub-leases, for
noncancellable agreements at December 31, 1994, are as follows:
 
<TABLE>
<CAPTION>
                                                                    RENTAL
                                                                  COMMITMENTS     SUB-LEASES
                                                                  -----------     ----------
      <S>                                                         <C>             <C>
      1995....................................................    $  449,618      $ (119,090)
      1996....................................................       427,751        (143,027)
      1997....................................................       307,764
      1998....................................................       303,640
      1999....................................................       302,504
      Thereafter..............................................     1,543,260
                                                                  -----------     ----------
                                                                  $3,334,537      $ (262,117)
                                                                  ==========       =========
</TABLE>
 
   
     Rental expense was $222,279, $233,934 and $255,650 for the years ended
December 31, 1992, 1993 and 1994, respectively.
    
 
                                      F-15
<PAGE>   165
 
                  BENTON OIL AND GAS COMPANY AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 6 -- TAXES ON INCOME
 
     The tax effects of significant items comprising the Company's net deferred
income taxes as of December 31, 1993 and 1994 are as follows:
 
<TABLE>
<CAPTION>
                                                                   1993            1994
                                                                -----------     -----------
    <S>                                                         <C>             <C>
    Deferred tax assets:
      Operating loss carryforwards............................  $10,926,000     $12,950,000
      Foreign tax credit carryforwards........................                      549,000
    Valuation allowance.......................................   (7,000,000)     (5,324,000)
                                                                -----------     -----------
    Total.....................................................    3,926,000       8,175,000
                                                                -----------     -----------
    Deferred tax liabilities:
      Difference in basis of property.........................    3,926,000       4,145,000
      Undistributed earnings of foreign subsidiaries..........                    4,030,000
                                                                -----------     -----------
    Total.....................................................    3,926,000       8,175,000
                                                                -----------     -----------
    Net deferred tax liability................................  $        --     $        --
                                                                 ==========      ==========
</TABLE>
 
     A comparison of the income tax expense at the federal statutory rate to the
Company's provision for income taxes is as follows:
 
<TABLE>
<CAPTION>
                                                           1992            1993          1994
                                                        -----------     -----------   -----------
<S>                                                     <C>             <C>           <C>
Income (loss) before income taxes:
  United States.....................................    $(2,909,000)    $(2,988,000)  $(4,363,000)
  Foreign...........................................                     (1,841,000)   10,109,000
                                                        -----------     -----------   -----------
     Total..........................................    $(2,909,000)    $(4,829,000)  $ 5,746,000
                                                         ==========      ==========    ==========
  Computed tax expense at the statutory rate........    $  (990,000)    $(1,690,000)  $ 2,011,000
  State income taxes, net of federal effect.........                                      287,000
  Other.............................................                                       76,000
  Change in valuation allowance.....................        990,000       1,690,000    (1,676,000)
                                                        -----------     -----------   -----------
  Provision for income taxes........................    $        --     $        --   $   698,000
                                                         ==========      ==========    ==========
</TABLE>
 
     The provision for income taxes for 1994 consists primarily of foreign
income taxes currently payable. The Company is providing for deferred income
taxes on undistributed earnings of foreign subsidiaries.
 
     The Company has provided a valuation allowance for the excess benefits of
operating loss and tax credit carryforwards. As of December 31, 1994, the
Company had, for federal income tax purposes, operating loss carryforwards of
approximately $32.4 million, expiring in the years 2003 through 2009. If the
carryforwards are ultimately realized, approximately $3.0 million will be
credited to additional paid-in capital for tax benefits associated with
deductions for income tax purposes related to stock options. The Company has
available approximately $12.4 million and approximately $1.5 million of net
operating loss carryforwards for state and foreign income tax purposes,
respectively.
 
NOTE 7 -- STOCK OPTIONS
 
     The Company adopted its 1988 Stock Option Plan in December 1988 authorizing
options to acquire up to 418,824 shares of common stock. Under the plan,
incentive stock options were granted to key employees and other options, stock
or bonus rights were granted to key employees, directors, independent
contractors and consultants at prices equal to or below market price,
exercisable over various periods.
 
                                      F-16
<PAGE>   166
 
                  BENTON OIL AND GAS COMPANY AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
     The Company adopted its 1989 Nonstatutory Stock Option Plan during 1989
covering 2,000,000 shares of common stock which were granted to key employees,
directors, independent contractors and consultants at prices equal to or below
market prices, exercisable over various periods. The plan was amended during
1990 to add 1,960,000 shares of common stock to the plan.
 
     As shares became exercisable under the 1988 and 1989 plans, the Company
recorded compensation expense (a portion of which is associated with exploration
overhead and is therefore capitalized) to the extent that the market price on
the date of grant exceeded the option price. For years ended December 31, 1993
and 1992, compensation expense of $142,420 and $329,103, respectively, has been
recorded.
 
     In September 1991, the Company adopted the 1991-1992 Stock Option Plan and
the Directors' Stock Option Plan. The 1991-1992 Stock Option Plan permits the
granting of stock options to purchase up to 2,500,000 shares of the Company's
common stock in the form of incentive stock options ("ISOs") and nonqualified
stock options ("NQSOs") to officers and employees of the Company. Options may be
granted as ISOs, NQSOs or a combination of each, with exercise prices not less
than the fair market value of the common stock on the date of the grant. The
amount of ISOs that may be granted to any one participant is subject to the
dollar limitations imposed by the Internal Revenue Code of 1986, as amended. In
the event of a change in control of the Company, all outstanding options become
immediately exercisable to the extent permitted by the 1991-1992 Stock Option
Plan. All options granted to date under the 1991-1992 Stock Option Plan vest
ratably over a three-year period from their dates of grant.
 
     The Directors' Stock Option Plan permits the granting of nonqualified stock
options ("Director NQSOs") to purchase up to 200,000 shares of common stock to
nonemployee directors of the Company. Upon election as a director and annually
thereafter, each individual who serves as a nonemployee director automatically
is granted an option to purchase 10,000 shares of common stock at a price not
less than the fair market value of common stock on the date of grant. All
Director NQSOs vest automatically on the date of the grant of the options.
 
<TABLE>
<CAPTION>
                                                                                        1989 NONSTATUTORY
                                            1988 STOCK OPTION PLAN                      STOCK OPTION PLAN
                                     -------------------------------------   ----------------------------------------
                                         OPTION       OPTION    CURRENTLY         OPTION        OPTION     CURRENTLY
                                         PRICES       SHARES   EXERCISABLE        PRICES        SHARES    EXERCISABLE
                                     --------------- --------  -----------   ---------------- ----------  -----------
<S>                                  <C>             <C>       <C>           <C>              <C>         <C>
Balance at January 1, 1992.........  $1.17 to $4.89   329,967    196,631     $1.39 to $11.75   2,390,332   1,206,999
                                                               ==========                                 ==========
Options exercised..................  $1.17 to $1.97  (216,334)                $1.39 to $4.89  (1,138,186)
                                                     --------                                 ----------
Balance at December 31, 1992.......                   113,633    113,633                       1,252,146     852,148
                                                               ==========                                 ==========
Options cancelled..................                                               $2.55          (40,000)
Options exercised..................       $1.17       (33,633)                $1.39 to $4.89    (250,579)
                                                     --------                                 ----------
Balance at December 31, 1993.......                    80,000     80,000                         961,567     951,567
                                                               ==========                                 ==========
Options exercised..................                                           $2.81 to $4.89     (23,000)
                                                     --------                                 ----------
Balance at December 31, 1994.......       $4.89        80,000     80,000     $1.39 to $11.75     938,567     938,567
                                                     ========= ==========                     ==========  ==========
</TABLE>
 
                                      F-17
<PAGE>   167
 
                  BENTON OIL AND GAS COMPANY AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
<TABLE>
<CAPTION>
                                           1991-1992 STOCK OPTION PLAN              DIRECTORS' STOCK OPTION PLAN
                                     ----------------------------------------   -------------------------------------
                                          OPTION        OPTION     CURRENTLY         OPTION      OPTION    CURRENTLY
                                          PRICES        SHARES    EXERCISABLE        PRICES      SHARES   EXERCISABLE
                                     ----------------- ---------  -----------   ---------------- -------  -----------
<S>                                  <C>               <C>        <C>           <C>              <C>      <C>
Balance at January 1, 1992..........      $10.125        328,000                    $10.125       30,000         --
Options granted.....................  $5.25 to $8.75     510,000                $6.25 to $10.25   50,000
                                                       ---------                                 -------
Balance at December 31, 1992........                     838,000    109,334                       80,000      9,999
                                                                  ==========                              ==========
Options granted.....................  $8.13 to $8.75     345,000                     $7.00        40,000
Options cancelled................... $7.75 to $10.125    (70,000)
                                                       ---------                                 -------
Balance at December 31, 1993........                   1,113,000    365,332                      120,000     36,667
                                                                  ==========                              ==========
Options granted.....................  $5.63 to $9.125    885,000                     $6.813       40,000
Options cancelled...................      $10.125         (3,000)
                                                       ---------                                 -------
Balance at December 31, 1994........ $5.50 to $10.125  1,995,000    733,334     $6.25 to $10.25  160,000    160,000
                                                       =========  ==========                     ======== ==========
</TABLE>
 
     In addition to options issued pursuant to the plans, options for 80,000,
135,000 and 19,000 shares of common stock were issued in 1994, 1993 and 1992,
respectively, to individuals other than officers, directors or employees of the
Company at prices ranging from $5.63 to $10.25. The options vest over three to
four years and at December 31, 1994, 76,000 options were vested.
 
NOTE 8 -- STOCK WARRANTS
 
     During the years ended December 31, 1991, 1992 and 1994, the Company issued
a total of 690,793, 658,617 and 450,000 warrants, respectively. Each warrant
entitles the holder to purchase one share of common stock at the exercise price
of the warrant. Substantially all the warrants are immediately exercisable upon
issuance.
 
     In April 1991, 655,813 warrants were issued in connection with the
privately placed sale of the Company's common stock. In October 1991, the
Company issued 34,980 warrants to a placement agent who marketed the Company's
8% convertible subordinated notes.
 
     In January 1992, 29,841 warrants were issued to a placement agent who sold
shares in the public offering of the Company's stock. In February 1992, 37,118
warrants were issued in connection with the marketing of working interests in a
well the Company drilled. Also in February 1992, 25,000 warrants were issued in
connection with an acquisition of a working interest in a well. In April 1992,
31,400 warrants were issued to a placement agent who marketed the Company's 8%
convertible subordinated debentures and in July 1992, 5,000 warrants were issued
to a consultant to the Company of which 2,500 were exercised during the year
ended December 31, 1993. The Company was the managing general partner of two
limited partnerships that were liquidated in November 1992. In October 1992,
530,258 warrants were issued to the partners in these partnerships in connection
with the liquidation.
 
     In September 1994, 250,000 warrants were issued in connection with the
issuance of $15 million in senior unsecured notes and in December 1994, 50,000
warrants were issued in connection with a revolving secured credit facility.
 
                                      F-18
<PAGE>   168
 
                  BENTON OIL AND GAS COMPANY AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
     In July 1994, the Company issued warrants entitling the holder to purchase
a total of 150,000 shares of common stock at $7.50 per share, subject to
adjustment in certain circumstances, that are exercisable on or before July
2004. 50,000 warrants were immediately exercisable, and 50,000 warrants become
exercisable each July in 1995 and 1996.
 
     The dates the warrants were issued, the expiration dates, the exercise
prices and the number of warrants issued and outstanding at December 31, 1994
were:
 
<TABLE>
<CAPTION>
 DATE ISSUED       EXPIRATION DATE     EXERCISE PRICE    ISSUED     OUTSTANDING
- --------------     ---------------     --------------   ---------   -----------
<S>                <C>                 <C>              <C>         <C>
  April 1991         April 1996            $14.41*        592,786      592,786
  April 1991         April 1996             11.56*         63,027       63,027
 October 1991       October 1996            14.07          34,980       34,980
 January 1992       January 1997            12.03          29,841       29,841
February 1992       February 1997           14.63*         37,118       37,118
February 1992       February 1997            9.00          25,000       25,000
  April 1992         April 1997             10.30          31,400       31,400
  July 1992           July 1997              7.30           5,000        2,500
 October 1992       October 1997            10.00         530,258      530,258
  July 1994           July 2004              7.50         150,000      150,000
September 1994     September 2002            9.00         250,000      250,000
December 1994       December 2004           12.00          50,000       50,000
                                                        ---------   -----------
                                                        1,799,410    1,796,910
                                                         ========    =========
</TABLE>
 
- ---------------
 *  Price represents weighted average price.
 
NOTE 9 -- REDEEMABLE COMMON STOCK
 
     On July 7, 1992, the Company issued 351,088 shares of Redeemable common
stock valued at $2,582,050. In connection with the stock issuance, the Company
guaranteed that proceeds from the resale of the shares of common stock by the
holders would be $2,582,050 plus accrued interest by July 1, 1993. During the
period ended December 31, 1992, 27,000 shares were resold for net proceeds of
$180,919, and the Company made cash payments of $319,081. During the six months
ended June 30, 1993, 272,828 shares were resold for net proceeds to the selling
stockholders of $2,022,323, and the Company made cash payments of $200,000,
terminating the Company's guarantee obligation. The Company redeemed the
remaining 51,260 shares on May 19, 1993 at their par value of $0.01 per share.
 
NOTE 10 -- RUSSIA JOINT VENTURE
 
     In December 1991, a joint venture agreement forming GEOILBENT, Limited,
between the Company and two Russian partners, Purneftegasgeologia and
Purneftegas, was approved by the appropriate regulatory bodies in Russia.
GEOILBENT's charter is to explore, develop, produce and market oil, condensate
and natural gas from the North Gubkinskoye field in the West Siberia region of
Russia, approximately two thousand miles northeast of Moscow. At the time of
GEOILBENT's formation, the field, which covers an area approximately 15 miles
long and 4 miles wide, had been delineated with over 60 wells, had been
production tested and had logged numerous oil and gas sands, but had never been
commercially produced. The joint venture agreement calls for the Company to have
a 34% working interest and the two Russian partners each to have a 33% working
interest in the joint venture. Production commenced during the third quarter of
1993.
 
     The Company is obligated under the terms of the GEOILBENT charter agreement
with its partners to make contributions of approximately $25.8 million by
December 31, 1995. At December 31, 1994, the Company's contributions totaled
approximately $19.4 million. During the first part of 1994, a combination of
volatile crude oil prices and a relatively high export tariff, among other
factors, constrained the pace of
 
                                      F-19
<PAGE>   169
 
                  BENTON OIL AND GAS COMPANY AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
   
development of the field by GEOILBENT. For the year ended December 31, 1994, the
Company recorded an expense for the export tariff of $1,397,317 which is
included in lease operating expenses and production taxes. In September 1994,
GEOILBENT received a recommendation from the Interdepartmental Commission of the
Ministry of Fuel and Energy for a waiver for one year from the export tariff.
Such waiver was received in March 1995, effective retroactively to January 1,
1995. GEOILBENT expects to apply for renewal of the waiver for 1996 and 1997.
The export tariff was reduced from 30 ECUs per ton to 20 ECUs per ton for 1995,
and there have been certain discussions regarding further reductions in the
future. However, the Russian regulatory environment continues to be volatile and
the Company is unable to predict the availability of the waiver during the
remainder of 1995 or for the future. The Company continues to evaluate the
economic and political environment in Russia to assess the potential effect on
the Company and its Russian operations.
    
 
NOTE 11 -- VENEZUELA JOINT VENTURE
 
     On July 31, 1992, the Company and its partner, Venezolana de Inversiones y
Construcciones Clerico, C.A. ("Vinccler"), signed an operating service agreement
to reactivate and further develop three Venezuelan oil fields with Lagoven,
S.A., an affiliate of the national oil company, Petroleos de Venezuela, S.A. The
operating service agreement covers the Uracoa, Bombal and Tucupita fields that
comprise the South Monagas unit. Under the terms of the operating service
agreement, Benton-Vinccler, a corporation owned 80% by the Company and 20% by
Vinccler, is a contractor for Lagoven and is responsible for overall operations
of the South Monagas unit, including all necessary investments to reactivate and
develop the fields comprising the unit. Benton-Vinccler receives an operating
fee in U.S. dollars deposited into a U.S. commercial bank account for each
barrel of crude oil produced (subject to periodic adjustments to reflect changes
in a special energy index of the U.S. Consumer Price Index) and is reimbursed
according to a prescribed formula in U.S. dollars for its capital costs,
provided that such operating fee and cost recovery fee cannot exceed the maximum
dollar amount per barrel set forth in the agreement (which amount is
periodically adjusted to reflect changes in the average of certain world crude
oil prices). The Venezuelan government maintains full ownership of all
hydrocarbons in the fields.
 
     Pursuant to the original joint venture agreement, the Company and Vinccler
each owned a 50% interest in a joint venture which operated the South Monagas
unit. Effective January 1, 1994, the operating service agreement and the joint
venture assets and liabilities were transferred to Benton-Vinccler, a
corporation in which the Company and Vinccler each owned 50% of the capital
stock. On March 4, 1994, the Company acquired capital stock from Vinccler
representing an additional 30% ownership interest in Benton-Vinccler for $3
million in cash, $10 million in non-interest bearing notes payable (with a
present value of $9.2 million assuming a 10% interest rate) payable in various
installments over 24 months and 200,000 shares of the Company's common stock.
The excess of the purchase price over the book value of the 30% interest was
allocated to oil and gas properties.
 
     Prior to the acquisition of the additional 30% interest in Benton-Vinccler,
the Company's interest in the Venezuelan joint venture was proportionately
consolidated based on its ownership interest. Effective with the acquisition of
the additional 30% interest in Benton-Vinccler, the Company has included
Benton-Vinccler in its consolidated financial statements, with the 20% owned by
Vinccler reflected as a minority interest.
 
                                      F-20
<PAGE>   170
 
                  BENTON OIL AND GAS COMPANY AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
   
     The following unaudited pro forma data represents the results of operations
for the Company for the year ended December 31, 1993 and 1994 as though the
acquisition of the 30% interest had been completed and Benton-Vinccler had been
consolidated as of January 1, 1993 and 1994, respectively.
    
 
<TABLE>
<CAPTION>
                                                                        1993           1994
                                                                     -----------    -----------
<S>                                                                  <C>            <C>
REVENUES...........................................................  $ 8,881,674    $34,766,997
                                                                     -----------    -----------
EXPENSES
  Lease operating costs and
     production taxes..............................................    6,274,717      9,531,264
  Depletion, depreciation and amortization.........................    2,967,221     10,298,112
  General and administrative.......................................    3,092,499      5,241,295
  Interest.........................................................    3,412,100      4,141,653
                                                                     -----------    -----------
                                                                      15,746,537     29,212,324
                                                                     -----------    -----------
Income (loss) before income taxes and minority interest............   (6,864,863)     5,554,673
Income taxes.......................................................                     697,802
                                                                     -----------    -----------
Income (loss) before minority interest.............................   (6,864,863)     4,856,871
Minority interest..................................................     (411,551)     2,085,392
                                                                     -----------    -----------
Net income (loss)..................................................  $(6,453,312)   $ 2,771,479
                                                                      ==========     ==========
Net income (loss) per common share.................................  $     (0.34)   $      0.11
                                                                      ==========     ==========
</TABLE>
 
NOTE 12 -- RELATED PARTY TRANSACTIONS
 
     On December 31, 1993, the Company guaranteed a loan made to Mr. A.E.
Benton, its President and Chief Executive Officer for $300,000. In January 1994,
the Company loaned $800,000 to Mr. Benton with interest at prime plus 1% payable
in November 1995, or on demand by the Company, whichever occurs first; in
September 1994, Mr. Benton made a payment of $207,014 against this loan.
 
NOTE 13 -- EARNINGS (LOSS) PER SHARE
 
   
     Primary earnings per common share are computed by dividing net income
(loss) by the weighted average number of common and common equivalent shares
outstanding. Common equivalent shares are shares which may be issuable upon
exercise of outstanding stock options and warrants; however, they are not
included in the computation for the years ended December 31, 1992 and 1993,
since their effect would be to reduce the net loss per share and for the year
ended December 31, 1994, because their effect would result in dilution of less
than 3%. Total weighted average shares outstanding during the years ended
December 31, 1992, 1993 and
1994 were 12,981,105, 18,608,770 and 24,850,922, respectively. Total weighted
average common and common equivalent shares outstanding during the six months
ended June 30, 1994 and 1995 were 25,153,248 and 26,459,123, respectively.
    
 
   
     Fully diluted earnings per common share are not presented since the
conversion of the Company's 8% Convertible Subordinated Notes and 8% Convertible
Subordinated Debentures would have an anti-dilutive effect.
    
 
NOTE 14 -- MAJOR CUSTOMERS
 
     The Company is principally involved in the business of oil and gas
exploration and production. Oil and gas purchasers that represent more than 10%
of oil and gas revenues for the year ended December 31, 1994 were Lagoven, S.A.
(67%) and Texon Corporation (10%); for the year ended December 31, 1993 were
Texon Corporation (63%) and Lagoven, S.A. (18%); and for the year ended December
31, 1992 were Plains Marketing and Transportation, Inc. formerly Sunnybrook
Transmission, Inc. (60%) and Texon Corporation
(11%).
 
                                      F-21
<PAGE>   171
 
                  BENTON OIL AND GAS COMPANY AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 15 -- OIL AND GAS ACTIVITIES
 
     Total costs incurred in oil and gas acquisition, exploration and
development activities were:
 
<TABLE>
<CAPTION>
                                       VENEZUELA      UNITED STATES       RUSSIA           TOTAL
                                      -----------     -------------     -----------     ------------
<S>                                   <C>             <C>               <C>             <C>
YEAR ENDED DECEMBER 31, 1992
  Property acquisition costs........  $   880,937     $   3,182,151     $ 3,012,615     $  7,075,703
  Development costs.................      511,982         3,090,966       4,093,933        7,696,881
  Exploration costs.................                      1,980,546                        1,980,546
                                      -----------     -------------     -----------     ------------
                                      $ 1,392,919     $   8,253,663     $ 7,106,548     $ 16,753,130
                                       ==========       ===========      ==========      ===========
YEAR ENDED DECEMBER 31, 1993
  Property acquisition costs........                  $     380,178                     $    380,178
  Development costs.................  $ 6,307,756         2,149,632     $10,483,807       18,941,195
  Exploration costs.................      373,348         6,258,127                        6,631,475
                                      -----------     -------------     -----------     ------------
                                      $ 6,681,104     $   8,787,937     $10,483,807     $ 25,952,848
                                       ==========       ===========      ==========      ===========
YEAR ENDED DECEMBER 31, 1994
  Property acquisition costs........  $13,446,757     $     875,129                     $ 14,321,886
  Development costs.................   24,676,748         2,993,728     $ 8,654,730       36,325,206
  Exploration costs.................      265,856         2,542,935                        2,808,791
                                      -----------     -------------     -----------     ------------
                                      $38,389,361     $   6,411,792     $ 8,654,730     $ 53,455,883
                                       ==========       ===========      ==========      ===========
</TABLE>
 
     The Company's aggregate amount of capitalized costs related to oil and gas
producing activities consists of the following at December 31:
 
<TABLE>
<CAPTION>
                                       VENEZUELA      UNITED STATES       RUSSIA           TOTAL
                                      -----------     -------------     -----------     ------------
<S>                                   <C>             <C>               <C>             <C>
DECEMBER 31, 1993
  Proved property costs.............  $ 8,074,023     $  40,197,929     $16,832,410     $ 65,104,362
  Costs excluded from
     amortization...................                      9,551,744       2,423,871       11,975,615
  Less accumulated depletion........     (229,080)       (9,031,202)        (99,207)      (9,359,489)
                                      -----------      ------------     -----------     ------------
                                      $ 7,844,943     $  40,718,471     $19,157,074     $ 67,720,488
                                      ===========      ============     ===========     ============
DECEMBER 31, 1994
  Proved property costs.............  $46,523,663     $  27,508,414     $25,482,193     $ 99,514,270
  Costs excluded from
     amortization...................    6,743,012         7,523,454       2,428,818       16,695,284
  Less accumulated depletion........   (5,227,293)      (13,278,505)       (937,025)     (19,442,823)
                                      -----------      ------------     -----------     ------------
                                      $48,039,382     $  21,753,363     $26,973,986     $ 96,766,731
                                      ===========      ============     ===========     ============
</TABLE>
 
     The Company regularly evaluates its unproved properties to determine
whether impairment has occurred. The Company has excluded from amortization its
interest in unproved properties, the cost of uncompleted exploratory activities,
and portions of major development costs. Costs excluded from amortization at
December 31, 1994 totalled $16,695,284, including $6,743,012 related to
Venezuela, $3,398,505 related to West Cote Blanche Bay, $1,569,255 related to
Belle Isle, $2,113,609 related to Rabbit Island, $2,428,818 related to Russia,
and $442,085 related to other prospects. The principal portion of such costs are
expected to be included in amortizable costs during the next four years.
 
     Excluded costs at December 31, 1994 consisted of the following by year
incurred:
 
<TABLE>
<CAPTION>
                                     PRIOR TO 1992      1992         1993         1994         TOTAL
                                     -------------   ----------   ----------   ----------   -----------
<S>                                  <C>             <C>          <C>          <C>          <C>
Property acquisition costs.........   $ 3,091,936    $  564,829   $    7,164   $    4,947   $ 3,668,876
Development costs..................                                1,802,000    6,743,012     8,545,012
Exploration costs..................     1,161,964       623,725    1,943,823      751,884     4,481,396
                                     -------------   ----------   ----------   ----------   -----------
                                      $ 4,253,900    $1,188,554   $3,752,987   $7,499,843   $16,695,284
                                       ==========     =========    =========    =========    ==========
</TABLE>
 
                                      F-22
<PAGE>   172
 
                  BENTON OIL AND GAS COMPANY AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
     Results of operations for oil and gas producing activities were:
 
<TABLE>
<CAPTION>
                                          VENEZUELA      UNITED STATES       RUSSIA          TOTAL
                                         -----------     -------------     ----------     -----------
<S>                                      <C>             <C>               <C>            <C>
YEAR ENDED DECEMBER 31, 1992
Oil and gas revenues...................                   $ 8,209,134
Expenses:
  Lease operating costs and
     production taxes..................                     4,413,620
  Depletion............................                     2,937,887
                                                         -------------
     Total expenses....................                     7,351,507
                                                         -------------
Results of operations from oil and gas
  producing activities.................                   $   857,627
                                                           ==========
YEAR ENDED DECEMBER 31, 1993
Oil and gas revenues...................  $ 1,332,927      $ 5,565,455      $  323,928     $ 7,222,310
Expenses:
  Lease operating costs and
     production taxes..................    1,164,453        3,487,510         458,301       5,110,264
  Depletion............................      229,080        2,142,133          99,207       2,470,420
                                         -----------     -------------     ----------     -----------
     Total expenses....................    1,393,533        5,629,643         557,508       7,580,684
                                         -----------     -------------     ----------     -----------
Results of operations from oil and gas
  producing activities.................  $   (60,606)     $   (64,188)     $ (233,580)    $  (358,374)
                                          ==========       ==========       =========      ==========
YEAR ENDED DECEMBER 31, 1994
Oil and gas revenues...................  $21,472,015      $ 6,957,855      $3,512,940     $31,942,810
Expenses:
  Lease operating costs and
     production taxes..................    3,807,434        2,891,209       2,832,621       9,531,264
  Depletion............................    4,998,213        4,247,303         837,818      10,083,334
                                         -----------     -------------     ----------     -----------
     Total expenses....................    8,805,647        7,138,512       3,670,439      19,614,598
                                         -----------     -------------     ----------     -----------
Results of operations from oil and gas
  producing activities.................  $12,666,368      $  (180,657)     $ (157,499)    $12,328,212
                                          ==========       ==========       =========      ==========
</TABLE>
 
     In May 1994, the Company entered into a commodity hedge agreement designed
to reduce a portion of the Company's risk from oil price movements. Pursuant to
the hedge agreement, the Company will receive $16.82 per Bbl and will pay the
average price per Bbl of West Texas Intermediate Light Sweet Crude Oil. Such
payments will be made with respect to production of 1,000 Bbl of oil per day for
1994, 1,250 Bbl of oil per day in 1995 and 1,500 Bbl of oil per day for 1996.
During the year ended December 31, 1994, the Company incurred losses of $328,868
under the hedge agreement. The Company is exposed to credit loss in the event of
non-performance by the counterparty. The Company anticipates, however, that the
counterparty will be able to fully satisfy its obligation under the contract.
 
  Quantities of Oil and Gas Reserves (unaudited)
 
     Proved reserves are estimated quantities of crude oil, natural gas, and
natural gas liquids which geological and engineering data demonstrate with
reasonable certainty to be recoverable from known reservoirs under existing
economic and operating conditions. Proved developed reserves are those which are
expected to be recovered through existing wells with existing equipment and
operating methods. All Venezuelan reserves are attributable to an operating
service agreement between the Company and Lagoven, S.A., under which all mineral
rights are owned by the government of Venezuela. Sales of reserves in place in
1994 include reserves related to the United States properties sold in March 1995
(See Note 2).
 
     The evaluations of the oil and gas reserves as of December 31, 1992, 1993
and 1994 were audited by Huddleston & Co., Inc., independent petroleum
engineers.
 
                                      F-23
<PAGE>   173
 
                  BENTON OIL AND GAS COMPANY AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
<TABLE>
<CAPTION>
                                                                                                    MINORITY
                                                                UNITED                             INTEREST IN
                                                  VENEZUELA     STATES      RUSSIA      TOTAL       VENEZUELA      NET TOTAL
                                                  ---------     -------     ------     -------     -----------     ---------
<S>                                               <C>           <C>         <C>        <C>         <C>             <C>
PROVED RESERVES -- CRUDE OIL, CONDENSATE, AND
  GAS LIQUIDS (MBBLS)
YEAR ENDED DECEMBER 31, 1992
  Proved reserves beginning of the year.........                 13,007     8,137       21,144                       21,144
  Revisions of previous estimates...............                    278        (4 )        274                          274
  Purchases of reserves in place................     8,966          579                  9,545                        9,545
  Extensions, discoveries and improved
    recovery....................................                     42                     42                           42
  Production....................................                   (376)                  (376)                        (376)
  Sales of reserves in place....................                   (336)                  (336)                        (336)
                                                  ---------     -------     ------     -------     -----------     ---------
  Proved reserves end of year...................     8,966       13,194     8,133       30,293             0         30,293
                                                  =========     =======     ======     =======     =========       =========
YEAR ENDED DECEMBER 31, 1993
  Proved reserves beginning of the year.........     8,966       13,194     8,133       30,293                       30,293
  Revisions of previous estimates...............        32       (2,490)      259       (2,199)                      (2,199)
  Extensions, discoveries and improved
    recovery....................................    10,551          132     1,757       12,440                       12,440
  Production....................................      (160)        (292)      (28 )       (480)                        (480)
  Sales of reserves in place....................                   (286)                  (286)                        (286)
                                                  ---------     -------     ------     -------     -----------     ---------
  Proved reserves end of year...................    19,389       10,258     10,121      39,768             0         39,768
                                                  =========     =======     ======     =======     =========       =========
YEAR ENDED DECEMBER 31, 1994
  Proved reserves beginning of the year.........    19,389       10,258     10,121      39,768                       39,768
  Revisions of previous estimates...............    (2,583)       1,819      (201 )       (965)          517           (448)
  Purchases of reserves in place................    19,389                              19,389        (7,756)        11,633
  Extensions, discoveries and improved
    recovery....................................    27,032          152     7,914       35,098        (5,406)        29,692
  Production....................................    (2,520)        (226)     (294 )     (3,040)          504         (2,536)
  Sales of reserves in place....................                (11,770)               (11,770)                     (11,770)
                                                  ---------     -------     ------     -------     -----------     ---------
  Proved reserves end of year...................    60,707          233     17,540      78,480       (12,141)        66,339
                                                  =========     =======     ======     =======     =========       =========
PROVED DEVELOPED RESERVES AT:
  January 1, 1992...............................                  8,233                  8,233                        8,233
  December 31, 1992.............................     2,269       10,905                 13,174                       13,174
  December 31, 1993.............................     3,999        8,153       400       12,552                       12,552
  December 31, 1994.............................    12,580          155     2,772       15,507        (2,516)        12,991
PROVED RESERVES -- NATURAL GAS (MMCF)
YEAR ENDED DECEMBER 31, 1992
  Proved reserves beginning of the year.........                 25,343                 25,343                       25,343
  Revisions of previous estimates...............                    286                    286                          286
  Purchases of reserves in place................                    797                    797                          797
  Extensions, discoveries and improved
    recovery....................................                    648                    648                          648
  Production....................................                   (832)                  (832)                        (832)
  Sales of reserves in place....................                 (6,787)                (6,787)                      (6,787)
                                                  ---------     -------     ------     -------     -----------     ---------
  Proved reserves end of year...................         0       19,455         0       19,455             0         19,455
                                                  =========     =======     ======     =======     =========       =========
YEAR ENDED DECEMBER 31, 1993
  Proved reserves beginning of the year.........                 19,455                 19,455                       19,455
  Revisions of previous estimates...............                 (3,400)                (3,400)                      (3,400)
  Extensions, discoveries and improved
    recovery....................................                  2,820                  2,820                        2,820
  Production....................................                   (233)                  (233)                        (233)
  Sales of reserves in place....................                   (543)                  (543)                        (543)
                                                  ---------     -------     ------     -------     -----------     ---------
  Proved reserves end of year...................         0       18,099         0       18,099             0         18,099
                                                  =========     =======     ======     =======     =========       =========
YEAR ENDED DECEMBER 31, 1994
  Proved reserves beginning of the year.........                 18,099                 18,099                       18,099
  Revisions of previous estimates...............                 (1,120)                (1,120)                      (1,120)
  Extensions, discoveries and improved
    recovery....................................                  9,153                  9,153                        9,153
  Production....................................                 (2,062)                (2,062)                      (2,062)
  Sales of reserves in place....................                 (7,993)                (7,993)                      (7,993)
                                                  ---------     -------     ------     -------     -----------     ---------
  Proved reserves end of year...................         0       16,077         0       16,077             0         16,077
                                                  =========     =======     ======     =======     =========       =========
PROVED DEVELOPED RESERVES AT:
  January 1, 1992...............................                 16,184                 16,184                       16,184
  December 31, 1992.............................                  9,930                  9,930                        9,930
  December 31, 1993.............................                  6,584                  6,584                        6,584
  December 31, 1994.............................                  8,385                  8,385                        8,385
</TABLE>
 
                                      F-24
<PAGE>   174
 
                  BENTON OIL AND GAS COMPANY AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
     (1) The Securities and Exchange Commission requires the reserve
presentation to be calculated using year-end prices and costs and assuming a
continuation of existing economic conditions. Proved reserves cannot be measured
exactly, and the estimation of reserves involves judgmental determinations.
Reserve estimates must be reviewed and adjusted periodically to reflect
additional information gained from reservoir performance, new geological and
geophysical data and economic changes. The above estimates are based on current
technology and economic conditions, and the Company considers such estimates to
be reasonable and consistent with current knowledge of the characteristics and
extent of production. The estimates include only those amounts considered to be
Proved Reserves and do not include additional amounts which may result from new
discoveries in the future, or from application of secondary and tertiary
recovery processes where facilities are not in place.
 
     (2) Proved Developed Reserves are reserves which can be expected to be
recovered through existing wells with existing equipment and operating methods.
This classification includes:
 
          (a) Proved developed producing reserves which are reserves expected to
     be recovered through existing completion intervals now open for production
     in existing wells; and
 
          (b) Proved developed nonproducing reserves which are reserves that
     exist behind the casing of existing wells which are expected to be produced
     in the predictable future, where the cost of making such oil and gas
     available for production should be relatively small compared to the cost of
     a new well.
 
     Any reserves expected to be obtained through the application of fluid
injection or other improved recovery techniques for supplementing primary
recovery methods are included as Proved Developed Reserves only after testing by
a pilot project or after the operation of an installed program has confirmed
through production response that increased recovery will be achieved.
 
     (3) Proved Undeveloped Reserves are Proved Reserves which are expected to
be recovered from new wells on undrilled acreage or from existing wells where a
relatively major expenditure is required for recompletion. Reserves on undrilled
acreage are limited to those drilling units offsetting productive units, which
are reasonably certain of production when drilled.
 
     Proved Reserves for other undrilled units are claimed only where it can be
demonstrated with certainty that there is continuity of production from the
existing productive formation. No estimates for Proved Undeveloped Reserves are
attributable to or included in this table for any acreage for which an
application of fluid injection or other improved recovery technique is
contemplated unless proved effective by actual tests in the area and in the same
reservoir.
 
     (4) The Company's engineering estimates indicate that approximately 18 Bcf
of natural gas reserves (net to the Company's interest) will be developed and
produced in association with the development and production of the Company's
proved oil reserves in Russia. The Company expects that, due to current market
conditions, it will initially reinject or flare such associated natural gas
production, and accordingly, no future net revenue has been assigned to these
reserves. Under the joint venture agreement, such reserves are owned by the
Company in the same proportion as all other hydrocarbons in the field, and
subsequent changes in conditions could result in the assignment of value to
these reserves.
 
     (5) Changes in previous estimates of proved reserves result from new
information obtained from production history and changes in economic factors.
 
  Standardized Measure of Discounted Future Net Cash Flows Relating to Proved
Oil and Gas Reserve
  Quantities (unaudited)
 
     The standardized measure of discounted future net cash flows is presented
in accordance with the provisions of SFAS No. 69. In preparing this data,
assumptions and estimates have been used, and the Company cautions against
viewing this information as a forecast of future economic conditions.
 
                                      F-25
<PAGE>   175
 
                  BENTON OIL AND GAS COMPANY AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
     Future cash inflows were estimated by applying year-end prices, adjusted
for fixed and determinable escalations provided by contract, to the estimated
future production of year-end proved reserves. Future cash inflows were reduced
by estimated future production and development costs to determine pre-tax cash
inflows. Future income taxes were estimated by applying the year-end statutory
tax rates to the future pre-tax cash inflows, less the tax basis of the
properties involved, and adjusted for permanent differences and tax credits and
allowances. The resultant future net cash inflows are discounted using a ten
percent discount rate.
 
     Russia has established an export tariff on all oil produced in and exported
from Russia. GEOILBENT has received a waiver from the export tariff for 1995.
For purposes of estimating future net cash flows, the export tariff has been
applied to the Company's Russian production for the remainder of the life of the
operations after 1995, although the Company believes that additional waivers may
be obtained in the future. The discounted value of the waiver net to the
Company's interest as of December 31, 1994 was approximately $3 million.
 
STANDARDIZED MEASURE
 
<TABLE>
<CAPTION>
                                                                                                      MINORITY
                                                                    UNITED                           INTEREST IN
                                                       VENEZUELA    STATES     RUSSIA      TOTAL      VENEZUELA    NET TOTAL
                                                       ---------   --------   --------   ---------   -----------   ---------
                                                                              (AMOUNTS IN THOUSANDS)
<S>                                                    <C>         <C>        <C>        <C>         <C>           <C>
DECEMBER 31, 1992
  Future cash inflow.................................    88,255     275,734    148,842     512,831
  Future production costs............................   (12,018 )   (94,685)   (58,757)   (165,460)
  Other related future costs.........................   (11,338 )   (64,402)   (12,644)    (88,384)
                                                       ---------   --------   --------   ---------
  Future net revenue before income taxes.............    64,899     116,647     77,441     258,987
  10% annual discount for estimated timing of cash
    flows............................................   (32,720 )   (57,679)   (26,778)   (117,177)
                                                       ---------   --------   --------   ---------
  Discounted future net cash flows before income
    taxes............................................    32,179      58,968     50,663     141,810
  Future income taxes, discounted at 10% per annum...   (11,208 )   (10,296)   (16,296)    (37,800)
                                                       ---------   --------   --------   ---------
  Standardized measure of discounted future net
    cash flows.......................................  $ 20,971    $ 48,672   $ 34,367   $ 104,010
                                                       =========   ========   ========   =========
DECEMBER 31, 1993
  Future cash inflow.................................  $148,130    $183,911   $111,333   $ 443,374
  Future production costs............................   (16,952 )   (65,224)   (55,461)   (137,637)
  Other related future costs.........................   (19,841 )   (54,733)   (16,370)    (90,944)
                                                       ---------   --------   --------   ---------
  Future net revenue before income taxes.............   111,337      63,954     39,502     214,793
  10% annual discount for estimated timing of cash
    flows............................................   (39,131 )   (28,984)   (15,265)    (83,380)
                                                       ---------   --------   --------   ---------
  Discounted future net cash flows before income
    taxes............................................    72,206      34,970     24,237     131,413
  Future income taxes, discounted at 10% per annum...   (21,248 )    (2,924)    (4,725)    (28,897)
                                                       ---------   --------   --------   ---------
  Standardized measure of discounted future net
    cash flows.......................................  $ 50,958    $ 32,046   $ 19,512   $ 102,516
                                                       =========   ========   ========   =========
DECEMBER 31, 1994
  Future cash inflow.................................  $528,214    $ 32,091   $204,520   $ 764,825    $(105,643)   $ 659,182
  Future production costs............................   (64,950 )    (3,760)   (98,767)   (167,477)      12,990     (154,487)
  Other related future costs.........................   (79,486 )    (2,002)   (25,378)   (106,866)      15,897      (90,969)
                                                       ---------   --------   --------   ---------   -----------   ---------
  Future net revenue before income taxes.............   383,778      26,329     80,375     490,482      (76,756)     413,726
  10% annual discount for estimated timing of cash
    flows............................................  (114,948 )    (7,672)   (31,542)   (154,162)      22,990     (131,172)
                                                       ---------   --------   --------   ---------   -----------   ---------
  Discounted future net cash flows before income
    taxes............................................   268,830      18,657     48,833     336,320      (53,766)     282,554
  Future income taxes, discounted at 10% per annum...   (96,127 )      (371)   (16,435)   (112,933)      19,225      (93,708)
                                                       ---------   --------   --------   ---------   -----------   ---------
  Standardized measure of discounted future net
    cash flows.......................................  $172,703    $ 18,286   $ 32,398   $ 223,387    $ (34,541)   $ 188,846
                                                       =========   ========   ========   =========    =========    =========
</TABLE>
 
                                      F-26
<PAGE>   176
 
                  BENTON OIL AND GAS COMPANY AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
<TABLE>
<CAPTION>
                                                                  YEARS ENDED DECEMBER 31,
                                                             ----------------------------------
                                                               1992         1993         1994
                                                             --------     --------     --------
                                                                   (AMOUNTS IN THOUSANDS)
<S>                                                          <C>          <C>          <C>
CHANGES IN STANDARDIZED MEASURE
Balance, January 1.........................................  $ 78,464     $104,010     $102,516
Changes resulting from:
Sales of oil and gas, net of related costs.................    (3,796)      (2,112)     (22,412)
Revisions to estimates of proved reserves:
  Pricing..................................................     5,073      (52,239)      (6,243)
  Quantities...............................................     1,163       (6,292)      (4,150)
Sales of reserves in place.................................    (4,339)      (1,735)     (28,664)
Extensions, discoveries and improved recovery, net of
  future costs.............................................     1,595       47,700      169,860
Purchases of reserves in place.............................    34,207                    72,206
Accretion of discount......................................    10,255       14,181       13,142
Change in income taxes.....................................   (12,558)       8,903      (84,036)
Development costs incurred.................................     3,091       10,480       13,365
Changes in timing and other................................    (9,145)     (20,380)      (2,197)
                                                             --------     --------     --------
Balance, December 31.......................................  $104,010     $102,516     $223,387
                                                             ========     ========     ========
</TABLE>
 
NOTE 16 -- QUARTERLY FINANCIAL DATA (UNAUDITED)
 
     Summarized quarterly financial data is as follows:
 
<TABLE>
<CAPTION>
                                                                         QUARTER ENDED
                                                      ---------------------------------------------------
                                                      MARCH 31,   JUNE 30,   SEPTEMBER 30,   DECEMBER 31,
                                                      ---------   --------   -------------   ------------
                                                         (AMOUNTS IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                                   <C>         <C>        <C>             <C>
YEAR ENDED DECEMBER 31, 1993
Revenues............................................   $ 1,803     $1,930       $ 1,701        $  2,069
Expenses............................................     2,551      2,658         2,914           4,209
                                                      ---------   --------   -------------   ------------
Net loss............................................   $  (748)    $ (728)      $(1,213)       $ (2,140)
                                                       =======     ======    ==========      ==========
Net loss per common share(1)........................   $ (0.04)    $(0.04)      $ (0.07)       $  (0.10)
                                                       =======     ======    ==========      ==========
YEAR ENDED DECEMBER 31, 1994
Revenues............................................   $ 3,755     $8,478       $ 9,573        $ 12,899
Expenses............................................     4,834      6,649         6,726          10,750
                                                      ---------   --------   -------------   ------------
Income (loss) before income taxes and minority
  interest..........................................    (1,079)     1,829         2,847           2,149
Income taxes........................................        --         --           270             428
                                                      ---------   --------   -------------   ------------
Income (loss) before minority interest..............    (1,079)     1,829         2,577           1,721
Minority interest...................................        63        685           751             595
                                                      ---------   --------   -------------   ------------
Net income (loss)...................................   $(1,142)    $1,144       $ 1,826        $  1,126
                                                       =======     ======    ==========      ==========
Net income (loss) per common share..................   $ (0.05)    $ 0.05       $  0.07        $   0.05
                                                       =======     ======    ==========      ==========
</TABLE>
 
- ---------------
(1) The sum of the quarters for 1993 does not equal the total year net income
    per share due to rounding.
 
                                      F-27
<PAGE>   177
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1989-1, L.P.
 
                         INDEX TO FINANCIAL STATEMENTS
 
   
<TABLE>
<CAPTION>
                                                                                        PAGE
                                                                                        -----
<S>                                                                                     <C>
Independent Auditors' Report..........................................................   F-29
Balance Sheets at December 31, 1993 and 1994 and June 30, 1995........................   F-30
Statements of Operations for the Years Ended December 31, 1992, 1993 and 1994 and the
  Six Months Ended June 30, 1994 and 1995.............................................   F-31
Statements of Partners' Capital for the Years Ended December 31, 1992, 1993 and 1994
  and the Six Months Ended June 30, 1995..............................................   F-32
Statements of Cash Flows for the Years Ended December 31, 1992, 1993 and 1994 and the
  Six Months Ended June 30, 1994 and 1995.............................................   F-33
Notes to Financial Statements for the Years Ended December 31, 1992, 1993 and 1994 and
  the Six Months ended June 30, 1994 and 1995.........................................   F-34
</TABLE>
    
 
                                      F-28
<PAGE>   178
 
                          INDEPENDENT AUDITORS' REPORT
 
Benton Oil & Gas Combination Partnership 1989-1, L.P.
Carpinteria, California
 
We have audited the accompanying balance sheets of Benton Oil & Gas Combination
Partnership 1989-1, L.P. as of December 31, 1994 and 1993, and the related
statements of operations, partners' capital, and cash flows for each of the
three years in the period ended December 31, 1994. These financial statements
are the responsibility of the Partnership's management. Our responsibility is to
express an opinion on these financial statements based on our audits.
 
We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
In our opinion, such financial statements present fairly, in all material
respects, the financial position of Benton Oil & Gas Combination Partnership
1989-1, L.P. at December 31, 1994 and 1993, and the results of its operations
and its cash flows for each of the three years in the period ended December 31,
1994 in conformity with generally accepted accounting principles.
 
Deloitte & Touche LLP
 
Los Angeles, California
March 31, 1995
 
                                      F-29
<PAGE>   179
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1989-1, L.P.
 
                                 BALANCE SHEETS
 
   
<TABLE>
<CAPTION>
                                                                 DECEMBER 31,
                                                             ---------------------     JUNE 30,
                                                               1993         1994         1995
                                                             --------     --------     ---------
                                                                                       (UNAUDITED)
<S>                                                          <C>          <C>          <C>
                                      ASSETS
Current Assets:
  Cash.....................................................  $112,756     $  6,401     $   5,717
  Receivable from Co-Managing General Partners.............    13,535                        621
  Property held for sale (Note 4)..........................                              323,296
                                                             --------     --------     ---------
          Total Current Assets.............................   126,291        6,401       329,634
Oil and Gas Properties (net of accumulated depletion of
  $338,673 and $414,876, respectively).....................   443,807      400,651
Organization Costs (net of accumulated amortization of
  $10,994).................................................     1,692
                                                             --------     --------     ---------
          Total Assets.....................................  $571,790     $407,052     $ 329,634
                                                             ========     ========      ========
LIABILITIES AND PARTNERS' CAPITAL
Current Liabilities:
  Payable to Co-Managing General Partners..................               $  2,281
Commitments and Contingencies (Note 5)
Partners' Capital:
  Co-Managing General Partners' capital....................  $ 94,780     $ 14,658     $  23,147
  Participants' capital....................................   477,010      390,113       306,487
                                                             --------     --------     ---------
          Total Partners' Capital..........................   571,790      404,771       329,634
                                                             --------     --------     ---------
          Total Liabilities and Partners' Capital..........  $571,790     $407,052     $ 329,634
                                                             ========     ========      ========
</TABLE>
    
 
                See accompanying notes to financial statements.
 
                                      F-30
<PAGE>   180
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1989-1, L.P.
 
                            STATEMENTS OF OPERATIONS
 
   
<TABLE>
<CAPTION>
                                                                                   SIX MONTHS
                                                 YEARS ENDED DECEMBER 31,        ENDED JUNE 30,
                                              ------------------------------   -------------------
                                                1992       1993       1994       1994       1995
                                              --------   --------   --------   --------   --------
                                                                                   (UNAUDITED)
<S>                                           <C>        <C>        <C>        <C>        <C>
Revenues
  Oil and gas sales.........................  $214,854   $199,399   $158,875   $ 86,664   $ 77,733
  Other income..............................    10,606      3,981      1,538      1,216         32
                                              --------   --------   --------   --------   --------
                                               225,460    203,380    160,413     87,880     77,765
                                              --------   --------   --------   --------   --------
Expenses
  Lease operating costs and production
     taxes..................................    73,309     76,855     79,479     33,929     31,001
  Exploration costs.........................     1,627      1,891        789        789
  Depletion, impairment and amortization....   111,050     72,453     77,895     42,831     90,155
  General and administrative................    32,110     38,432     33,654     27,032     31,746
                                              --------   --------   --------   --------   --------
                                               218,096    189,631    191,817    104,581    152,902
                                              --------   --------   --------   --------   --------
     Net Income (Loss)......................  $  7,364   $ 13,749   $(31,404)  $(16,701)  $(75,137)
                                              ========   ========   ========   ========   ========
</TABLE>
    
 
                See accompanying notes to financial statements.
 
                                      F-31
<PAGE>   181
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1989-1, L.P.
 
                        STATEMENTS OF PARTNERS' CAPITAL
              FOR THE YEARS ENDED DECEMBER 31, 1992, 1993 AND 1994
   
                 AND (UNAUDITED) SIX MONTHS ENDED JUNE 30, 1995
    
 
   
<TABLE>
<CAPTION>
                                                             CO-MANAGING
                                                               GENERAL
                                                              PARTNERS     PARTICIPANTS     TOTAL
                                                             -----------   ------------   ----------
<S>                                                          <C>           <C>            <C>
Balance, January 1, 1992...................................   $  54,437     $   947,994   $1,002,431
Net income (loss)..........................................      26,841         (19,477)       7,364
Distributions..............................................      (2,065)       (279,753)    (281,818)
                                                             -----------   ------------   ----------
Balance, December 31, 1992.................................      79,213         648,764      727,977
Net income (loss)..........................................      18,103          (4,354)      13,749
Distributions..............................................      (2,536)       (167,400)    (169,936)
                                                             -----------   ------------   ----------
Balance, December 31, 1993.................................      94,780         477,010      571,790
Net income (loss)..........................................      10,295         (41,699)     (31,404)
Distributions..............................................     (90,417)        (45,198)    (135,615)
                                                             -----------   ------------   ----------
Balance, December 31, 1994.................................      14,658         390,113      404,771
Net income (loss) (unaudited)..............................       8,489         (83,626)     (75,137)
                                                             -----------   ------------   ----------
Balance, June 30, 1995 (unaudited).........................   $  23,147     $   306,487   $  329,634
                                                             ==========       =========    =========
</TABLE>
    
 
                See accompanying notes to financial statements.
 
                                      F-32
<PAGE>   182
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1989-1, L.P.
 
                            STATEMENTS OF CASH FLOWS
 
   
<TABLE>
<CAPTION>
                                                                                  SIX MONTHS
                                             YEARS ENDED DECEMBER 31,           ENDED JUNE 30,
                                         ---------------------------------   ---------------------
                                           1992        1993        1994        1994         1995
                                         ---------   ---------   ---------   --------     --------
                                                                                  (UNAUDITED)
<S>                                      <C>         <C>         <C>         <C>          <C>
Cash flows from operating activities:
  Net Income (Loss)....................  $   7,364   $  13,749   $ (31,404)  $(16,701)    $(75,137)
  Adjustments to reconcile net income
  (loss) to net cash provided by (used
  in) operating activities:
     Depletion, impairment and
       amortization....................    111,050      72,453      77,895     42,831       90,155
     Decrease in accounts payable......     (1,000)
                                         ---------   ---------   ---------   --------     --------
          Net cash provided by
            operating activities.......    117,414      86,202      46,491     26,130       15,018
                                         ---------   ---------   ---------   --------     --------
Cash flows from investing activities:
  Expenditures on oil and gas
     properties........................    (38,469)    (56,330)    (33,047)    (9,495)     (12,800)
                                         ---------   ---------   ---------   --------     --------
     Net cash used in investing
       activities......................    (38,469)    (56,330)    (33,047)    (9,495)     (12,800)
                                         ---------   ---------   ---------   --------     --------
Cash flows from financing activities:
  Net (increase) decrease in receivable
     from Co-Managing General
     Partners..........................    (38,908)     12,744      13,535      3,777         (621)
  Net increase (decrease) in payable to
     Co-Managing General Partners......                              2,281                  (2,281)
  Partner distributions................   (281,818)   (169,936)   (135,615)   (30,436)
                                         ---------   ---------   ---------   --------     --------
     Net cash used in financing
       activities......................   (320,726)   (157,192)   (119,799)   (26,659)      (2,902)
                                         ---------   ---------   ---------   --------     --------
Net decrease in cash...................   (241,781)   (127,320)   (106,355)   (10,024)        (684)
Cash at beginning of period............    481,857     240,076     112,756    112,756        6,401
                                         ---------   ---------   ---------   --------     --------
Cash at end of period..................  $ 240,076   $ 112,756   $   6,401   $102,732     $  5,717
                                         =========   =========   =========   ========     ========
</TABLE>
    
 
                See accompanying notes to financial statements.
 
                                      F-33
<PAGE>   183
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1989-1, L.P.
 
                         NOTES TO FINANCIAL STATEMENTS
                  YEARS ENDED DECEMBER 31, 1992, 1993 AND 1994
   
            AND (UNAUDITED) SIX MONTHS ENDED JUNE 30, 1994 AND 1995
    
 
NOTE 1 -- ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
  Organization
 
     Benton Oil & Gas Combination Partnership 1989-1, L.P. (Partnership) was
formed for the purpose of investing in oil and natural gas by acquiring proven
producing properties, recompleting previously drilled wells and developing and
drilling oil and gas wells in the state waters of Texas and offshore Louisiana.
 
     Benton Oil and Gas Company (Benton) and a wholly owned subsidiary are the
Co-Managing General Partners and as such conduct, direct and exercise full
control over all activities of the Partnership.
 
  Oil and Gas Properties
 
   
     Oil and gas properties are accounted for using the successful efforts
method. Under this method, costs of drilling exploratory wells are initially
capitalized pending determination of whether the well can produce proved
reserves. All costs relating to nonproductive exploratory wells are expensed.
Costs relating to productive exploratory wells and all development wells are
capitalized and depleted on a units-of-production basis over the life of the
remaining proved developed reserves. Delay rentals and geological and
geophysical costs are expensed as incurred. Proved properties are reviewed
periodically on a property-by-property basis for impairment by comparing
capitalized costs to undiscounted estimated future cash flows from the
properties. Unproved oil and gas properties are periodically assessed for
impairment of value and a loss is recognized as appropriate.
    
 
  Organization Costs
 
     Organization costs are amortized over a period of five years using the
straight-line method.
 
  Income Taxes
 
   
     No provision has been made for income taxes as the liability for such taxes
is that of the partners rather than of the Partnership. At December 31, 1993 and
1994, the financial statement bases of the Partnership's assets exceeded their
tax bases by $179,502 and $179,796, respectively.
    
 
  Interim Reporting
 
   
     In the opinion of the Partnership, the accompanying unaudited consolidated
financial statements contain all adjustments (consisting of only normal
recurring accruals) necessary to present fairly the financial position as of
June 30, 1995, and the results of operations for the six month periods ended
June 30, 1994 and 1995.
    
 
   
     The results of operations for the six month period ended June 30, 1995 are
not necessarily indicative of the results to be expected for the full year.
    
 
NOTE 2 -- PARTICIPATION IN COSTS AND REVENUES
 
     Under the terms of the Partnership agreement, the general and limited
partners (Participants) pay 99% of the lease acquisition, geophysical and
seismic costs, well costs, general and administrative expenses, and organization
and offering expenses, including commissions, while the Co-Managing General
Partners pay 1% of such costs. Revenues, production taxes and lease operating
expenses on proven producing wells are allocated 99% to the Participants and 1%
to the Co-Managing General Partners. Revenues, production taxes and lease
operating expenses on recompleted wells are allocated 74.25% to the Participants
and 25.75% to the Co-Managing General Partners. On new wells drilled, revenues,
production taxes and lease operating expenses are allocated 64.35% to the
Participants and 35.65% to the Co-Managing General Partners.
 
                                      F-34
<PAGE>   184
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1989-1, L.P.
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 3 -- RELATED PARTY TRANSACTIONS
 
     The Partnership pays the Co-Managing General Partners for general and
administrative expenses, lease operating expenses and well costs incurred on
behalf of the Partnership. Benton pays the Partnership for revenues collected on
behalf of the Partnership.
 
NOTE 4 -- OIL AND GAS PROPERTIES
 
   
     In June 1995, the Partnership entered into an agreement to sell its
principal oil and gas properties. The sales price is subject to adjustments for
revenues, expenses and capital expenditures related to the properties until the
closing date. The agreement is subject to the approval of 75% of the partners. A
provision for impairment was made during the six months ended June 30, 1995 to
reflect the excess of book value over the adjusted sales price of $323,296. The
adjusted sales price has been reflected as property held for sale at June 30,
1995.
    
 
NOTE 5 -- COMMITMENTS AND CONTINGENCIES
 
     On June 13, 1994, certain limited partners of the Partnership, with limited
partners of other Benton partnerships, brought an action against Benton in
connection with its operation of the partnerships as managing general partner.
The parties have agreed to submit the dispute to arbitration and the lawsuit has
been dismissed. The plaintiffs seek actual and punitive damages for alleged
actions and omissions of Benton in connection with operating the partnerships
and alleged misrepresentations made by Benton in selling the limited partnership
interests. At this time, the Partnership has not been named a defendant in this
action. However, if the Partnership is added as a defendant, the Partnership
would be forced to expend financial resources to defend or resolve any such
matters. Benton does not believe that the Partnership will be adversely affected
by this action.
 
NOTE 6 -- OIL AND GAS ACTIVITIES
 
     Total costs incurred in oil and gas exploration and development were:
 
<TABLE>
<CAPTION>
                                                        1992          1993          1994
                                                      ---------     ---------     ---------
    <S>                                               <C>           <C>           <C>
    Development costs...............................  $  38,469     $  56,330     $  33,047
    Exploration costs...............................      1,627         1,891           789
                                                      ---------     ---------     ---------
                                                      $  40,096     $  58,221     $  33,836
                                                      =========     =========     =========
</TABLE>
 
     The Partnership's aggregate amount of capitalized costs related to oil and
gas producing activities consisted of the following at December 31:
 
<TABLE>
<CAPTION>
                                                        1992          1993          1994
                                                      ---------     ---------     ---------
    <S>                                               <C>           <C>           <C>
    Proved property costs...........................  $ 726,150     $ 782,480     $ 815,527
    Less accumulated depletion......................   (268,757)     (338,673)     (414,876)
                                                      ---------     ---------     ---------
                                                      $ 457,393     $ 443,807     $ 400,651
                                                      =========     =========     =========
</TABLE>
 
QUANTITIES OF OIL AND GAS RESERVES (UNAUDITED)
 
     Proved reserves are estimated quantities of crude oil, natural gas and
natural gas liquids which geological and engineering data demonstrate with
reasonable certainty to be recoverable from known reservoirs under existing
economic and operating conditions. Proved developed reserves are those which are
expected to be recovered through existing wells with existing equipment and
operating methods.
 
                                      F-35
<PAGE>   185
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1989-1, L.P.
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
     The evaluations of the oil and gas reserves were prepared by J.C. White, an
independent petroleum engineer until January 1, 1993, when he became an employee
of Benton.
 
<TABLE>
<CAPTION>
                                                                    1992       1993      1994
                                                                   -------   --------   -------
<S>                                                                <C>       <C>        <C>
PROVED RESERVES -- CRUDE OIL, CONDENSATE (BBLS)
  BALANCE, JANUARY 1.............................................   47,156     57,283    33,640
     Revisions of previous estimates.............................    7,274    (17,870)   (4,035)
     Extensions, discoveries and improved recovery...............    9,800
     Production..................................................   (6,947)    (5,773)   (5,475)
                                                                   -------   --------   -------
  BALANCE, DECEMBER 31...........................................   57,283     33,640    24,130
                                                                   =======   ========   =======
PROVED DEVELOPED RESERVES AT DECEMBER 31:........................   57,283     33,640    24,130
                                                                   =======   ========   =======
PROVED RESERVES -- NATURAL GAS (MCF)
  BALANCE, JANUARY 1.............................................  280,941    502,817   273,851
     Revisions of previous estimates.............................  211,038   (181,533)  (52,626)
     Extensions, discoveries and improved recovery...............   58,161
     Production..................................................  (47,323)   (47,433)  (38,044)
                                                                   -------   --------   -------
  BALANCE, DECEMBER 31...........................................  502,817    273,851   183,181
                                                                   =======   ========   =======
PROVED DEVELOPED RESERVES AT DECEMBER 31:........................  502,817    273,851   183,181
                                                                   =======   ========   =======
</TABLE>
 
- ---------------
(1) The Securities and Exchange Commission requires the reserve presentation to
    be calculated using year-end prices and costs and assuming a continuation of
    existing economic conditions. Proved reserves cannot be measured exactly,
    and the estimation of reserves involves judgmental determinations. Reserve
    estimates must be reviewed and adjusted periodically to reflect additional
    information gained from reservoir performance, new geological and
    geophysical data and economic changes. The above estimates are based on
    current technology and economic conditions, and Benton considers such
    estimates to be reasonable and consistent with current knowledge of the
    characteristics and extent of production. The estimates include only those
    amounts considered to be Proved Reserves and do not include additional
    amounts which may result from new discoveries in the future, or from
    application of secondary and tertiary recovery processes where facilities
    are not in place.
 
(2) Proved Developed Reserves are reserves which can be expected to be recovered
    through existing wells with existing equipment and operating methods. This
    classification includes:
 
        (a) Proved developed producing reserves which are reserves expected to
            be recovered through existing completion intervals now open for
            production in existing wells; and
 
        (b) Proved developed nonproducing reserves which are reserves that exist
            behind the casing of existing wells which are expected to be
            produced in the predictable future, where the costs of making such
            oil and gas available for production should be relatively small
            compared to the cost of a new well.
 
            Any reserves expected to be obtained through the application of
            fluid injection or other improved recovery techniques for
            supplementing primary recovery methods are included as Proved
            Developed Reserves only after testing by a pilot project or after
            the operation of an installed program has confirmed through
            production response that increased recovery will be achieved.
 
(3) Proved Undeveloped Reserves are Proved Reserves which are expected to be
    recovered from new wells on undrilled acreage or from existing wells where a
    relatively major expenditure is required for
 
                                      F-36
<PAGE>   186
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1989-1, L.P.
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
    recompletion. Reserves on undrilled acreage are limited to those drilling
    units offsetting productive units, which are reasonably certain of
    production when drilled.
 
     Proved Reserves for other undrilled units are claimed only where it can be
     demonstrated with certainty that there is continuity of production from the
     existing productive formation. No estimates for Proved Undeveloped Reserves
     are attributable to or included in this table for any acreage for which an
     application of fluid injection or other improved recovery technique is
     contemplated unless proved effective by actual tests in the area and in the
     same reservoir.
 
(4) Changes in previous estimates of proved reserves result from new information
    obtained from production history and changes in economic factors.
 
STANDARDIZED MEASURE OF DISCOUNTED FUTURE NET CASH FLOWS RELATING TO PROVED OIL
AND GAS RESERVE QUANTITIES (UNAUDITED)
 
     The standardized measure of discounted future net cash flows is presented
in accordance with the provisions of SFAS No. 69. In preparing this data,
assumptions and estimates have been used, and Benton cautions against viewing
this information as a forecast of future economic conditions.
 
     Future cash inflows were estimated by applying year-end prices, adjusted
for fixed and determinable escalations provided by contract, to the estimated
future production of year-end proved reserves. Future cash inflows were reduced
by estimated future production and development costs to determine pre-tax cash
inflows. The resultant future net cash inflows are discounted using a ten
percent discount rate.
 
<TABLE>
<CAPTION>
                                                                      DECEMBER 31,
                                                        ----------------------------------------
                                                           1992           1993           1994
                                                        ----------     -----------     ---------
<S>                                                     <C>            <C>             <C>
STANDARDIZED MEASURE
     Future cash inflow...............................  $1,935,000     $ 1,123,000     $ 678,000
     Future production costs..........................    (718,000)       (427,000)     (262,000)
     Other related future costs.......................     (13,000)        (13,000)       (5,000)
                                                        ----------     -----------     ---------
     Future net revenue...............................   1,204,000         683,000       411,000
     10% annual discount for estimated timing of
       cash flows.....................................    (568,000)       (135,000)      (85,000)
                                                        ----------     -----------     ---------
     Standardized measure of discounted future net
       cash flows.....................................  $  636,000     $   548,000     $ 326,000
                                                         =========      ==========     =========
</TABLE>
 
<TABLE>
<CAPTION>
                                                                 YEARS ENDED DECEMBER 31,
                                                           ------------------------------------
                                                             1992          1993          1994
                                                           ---------     ---------     --------
<S>                                                        <C>           <C>           <C>
CHANGES IN STANDARDIZED MEASURE
  Balance, January 1.....................................  $ 638,000     $ 636,000     $548,000
  Changes resulting from:
  Sales of oil and gas, net of related costs.............   (142,000)     (123,000)     (79,000)
  Revisions to estimates of proved reserves:
     Pricing.............................................    (58,000)       10,000      (80,000)
     Quantities..........................................     37,000       (52,000)     (76,000)
  Extensions, discoveries and improved recovery, net of
     future costs........................................     79,000
  Accretion of discount..................................     64,000        64,000       55,000
  Development costs incurred.............................     18,000        13,000        8,000
  Changes in timing and other............................                               (50,000)
                                                           ---------     ---------     --------
  Balance, December 31...................................  $ 636,000     $ 548,000     $326,000
                                                           =========     =========     ========
</TABLE>
 
                                      F-37
<PAGE>   187
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1990-1, L.P.
 
                         INDEX TO FINANCIAL STATEMENTS
 
   
<TABLE>
<CAPTION>
                                                                                        PAGE
                                                                                        ----
<S>                                                                                     <C>
Independent Auditors' Report..........................................................  F-39
Balance Sheets at December 31, 1993 and 1994 and June 30, 1995........................  F-40
Statements of Operations for the Years Ended December 31, 1992, 1993 and 1994 and the
  Six Months Ended June 30, 1994 and 1995.............................................  F-41
Statements of Partners' Capital for the Years Ended December 31, 1992, 1993 and 1994
  and the Six Months Ended June 30, 1995..............................................  F-42
Statements of Cash Flows for the Years Ended December 31, 1992, 1993 and 1994 and the
  Six Months Ended June 30, 1994 and 1995.............................................  F-43
Notes to Financial Statements for the Years Ended December 31, 1992, 1993 and 1994 and
  the Six Months Ended June 30, 1994 and 1995.........................................  F-44
</TABLE>
    
 
                                      F-38
<PAGE>   188
 
                          INDEPENDENT AUDITORS' REPORT
 
Benton Oil & Gas Combination Partnership 1990-1, L.P.
Carpinteria, California
 
We have audited the accompanying balance sheets of Benton Oil & Gas Combination
Partnership 1990-1, L.P. as of December 31, 1994 and 1993, and the related
statements of operations, partners' capital, and cash flows for each of the
three years in the period ended December 31, 1994. These financial statements
are the responsibility of the Partnership's management. Our responsibility is to
express an opinion on these financial statements based on our audits.
 
We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
In our opinion, such financial statements present fairly, in all material
respects, the financial position of Benton Oil & Gas Combination Partnership
1990-1, L.P. at December 31, 1994 and 1993, and the results of its operations
and its cash flows for each of the three years in the period ended December 31,
1994 in conformity with generally accepted accounting principles.
 
Deloitte & Touche LLP
 
Los Angeles, California
March 31, 1995
 
                                      F-39
<PAGE>   189
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1990-1, L.P.
 
                                 BALANCE SHEETS
 
   
<TABLE>
<CAPTION>
                                                               DECEMBER 31,
                                                         -------------------------      JUNE 30,
                                                            1993           1994           1995
                                                         ----------     ----------     -----------
                                                                                       (UNAUDITED)
<S>                                                      <C>            <C>            <C>
                        ASSETS
Current Assets:
  Cash.................................................  $  419,826     $   17,859     $   145,455
  Receivable from Co-Managing General Partners.........      40,291         36,882          56,281
  Marketable equity securities.........................       5,407
  Property held for sale (Note 4)......................                    146,900         930,865
                                                         ----------     ----------     -----------
     Total Current Assets..............................     465,524        201,641       1,132,601
Oil and Gas Properties (net of accumulated depletion of
  $1,421,548, $1,614,158 and $974,988, respectively)...   1,398,850      1,152,597         133,573
Organization Costs (net of accumulated amortization of
  $7,772, $9,941 and $10,843, respectively)............       3,071            902
                                                         ----------     ----------     -----------
     Total Assets......................................  $1,867,445     $1,355,140     $ 1,266,174
                                                          =========      =========       =========
                   PARTNERS' CAPITAL
Commitments and Contingencies (Note 5)
Partners' Capital:
  Co-Managing General Partners' capital................  $  436,921     $  111,441     $   126,832
  Participants' capital................................   1,429,384      1,240,417       1,134,106
  Special Limited Partners' Capital....................       1,140          3,282           5,236
                                                         ----------     ----------     -----------
     Total Partners' Capital...........................  $1,867,445     $1,355,140     $ 1,266,174
                                                          =========      =========       =========
</TABLE>
    
 
                See accompanying notes to financial statements.
 
                                      F-40
<PAGE>   190
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1990-1, L.P.
 
                            STATEMENTS OF OPERATIONS
 
   
<TABLE>
<CAPTION>
                                                                                   SIX MONTHS
                                          YEARS ENDED DECEMBER 31,               ENDED JUNE 30,
                                    -------------------------------------     ---------------------
                                       1992           1993         1994         1994         1995
                                    -----------     --------     --------     --------     --------
                                                                                   (UNAUDITED)
<S>                                 <C>             <C>          <C>          <C>          <C>
Revenues
  Oil and gas sales...............  $   735,886     $630,682     $518,728     $275,947     $234,454
  Other income....................       34,631       14,777        6,058        4,845          819
                                    -----------     --------     --------     --------     --------
                                        770,517      645,459      524,786      280,792      235,273
                                    -----------     --------     --------     --------     --------
Expenses
  Lease operating costs and
     production taxes.............      285,840      254,903      263,957      112,323      100,135
  Exploration costs...............        8,952        9,570        6,607        5,331        1,812
  Loss on sale of oil and gas
     properties...................       57,586                                               1,328
  Depletion, impairment and
     amortization.................    1,560,665      189,309      224,635      113,834      153,641
  General and administrative......       69,510       99,967       78,547       58,782       67,323
                                    -----------     --------     --------     --------     --------
                                      1,982,553      553,749      573,746      290,270      324,239
                                    -----------     --------     --------     --------     --------
     Net Income (Loss)............  $(1,212,036)    $ 91,710     $(48,960)    $ (9,478)    $(88,966)
                                     ==========     ========     ========     ========     ========
</TABLE>
    
 
                See accompanying notes to financial statements.
 
                                      F-41
<PAGE>   191
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1990-1, L.P.
 
                        STATEMENTS OF PARTNERS' CAPITAL
              FOR THE YEARS ENDED DECEMBER 31, 1992, 1993 AND 1994
   
                 AND (UNAUDITED) SIX MONTHS ENDED JUNE 30, 1995
    
 
   
<TABLE>
<CAPTION>
                                        CO-MANAGING                         SPECIAL LIMITED
                                      GENERAL PARTNERS     PARTICIPANTS         PARTNERS           TOTAL
                                      ----------------     ------------     ----------------     ----------
<S>                                   <C>                  <C>              <C>                  <C>
Balance, January 1, 1992............     $  291,366        $  4,363,866         $  8,433         $4,663,665
Net income (loss)...................         95,449          (1,313,862)           6,377         (1,212,036)
Distributions.......................                         (1,071,312)                         (1,071,312)
                                      ----------------     ------------     ----------------     ----------
Balance, December 31, 1992..........        386,815           1,978,692           14,810          2,380,317
Net income..........................         73,700              12,692            5,318             91,710
Distributions.......................        (23,594)           (562,000)         (18,988)          (604,582)
                                      ----------------     ------------     ----------------     ----------
Balance, December 31, 1993..........        436,921           1,429,384            1,140          1,867,445
Net income (loss)...................         42,947             (96,237)           4,330            (48,960)
Distributions.......................       (368,427)            (92,730)          (2,188)          (463,345)
                                      ----------------     ------------     ----------------     ----------
Balance, December 31, 1994..........        111,441           1,240,417            3,282          1,355,140
Net income (loss) (unaudited).......         15,391            (106,311)           1,954            (88,966)
                                      ----------------     ------------     ----------------     ----------
Balance, June 30, 1995
  (unaudited).......................     $  126,832        $  1,134,106         $  5,236         $1,266,174
                                       ============          ==========     ============          =========
</TABLE>
    
 
                See accompanying notes to financial statements.
 
                                      F-42
<PAGE>   192
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1990-1, L.P.
 
                            STATEMENTS OF CASH FLOWS
 
   
<TABLE>
<CAPTION>
                                                                                    SIX MONTHS
                                               YEARS ENDED DECEMBER 31,           ENDED JUNE 30,
                                          -----------------------------------   -------------------
                                             1992         1993        1994        1994       1995
                                          -----------   ---------   ---------   --------   --------
                                                                                    (UNAUDITED)
<S>                                       <C>           <C>         <C>         <C>        <C>
Cash flows from operating activities:
  Net Income (Loss)...................... $(1,212,036)  $  91,710   $ (48,960)  $ (9,478)  $(88,966)
  Adjustments to reconcile net income
     (loss) to net cash provided by
     operating activities:
     Depletion, impairment and
       amortization......................   1,560,665     189,309     224,635    113,834    153,641
     Dryhole costs.......................       1,238
     Loss on sale of oil and gas
       properties........................      57,586                                         1,328
     Realized gain on sale of marketable
       equity securities.................                              (2,265)
     Unrealized loss on marketable equity
       securities........................                   9,013                    451
                                          -----------   ---------   ---------   --------   --------
     Net cash provided by operating
       activities........................     407,453     290,032     173,410    104,807     66,003
                                          -----------   ---------   ---------   --------   --------
Cash flows from investing activities:
  Expenditures on oil and gas
     properties..........................    (151,217)   (179,512)   (123,113)   (50,358)   (65,908)
  Proceeds from sale of marketable equity
     securities..........................                               7,672
  Proceeds from sale of oil and gas
     properties..........................      26,485                                       146,900
                                          -----------   ---------   ---------   --------   --------
     Net cash provided by (used in)
       investing activities..............    (124,732)   (179,512)   (115,441)   (50,358)    80,992
                                          -----------   ---------   ---------   --------   --------
Cash flows from financing activities:
  Net (increase) decrease in receivable
     from Co-Managing General Partners...     (12,415)     36,387       3,409     19,767    (19,399)
  Decrease in receivable from
     Affiliate...........................     451,447
  Decrease in payable to Affiliate.......     (50,000)
  Partner distributions..................  (1,071,312)   (604,582)   (463,345)   (64,633)
                                          -----------   ---------   ---------   --------   --------
     Net cash used in financing
       activities........................    (682,280)   (568,195)   (459,936)   (44,866)   (19,399)
                                          -----------   ---------   ---------   --------   --------
Net increase (decrease) in cash..........    (399,559)   (457,675)   (401,967)     9,583    127,596
Cash at beginning of period..............   1,277,060     877,501     419,826    419,826     17,859
                                          -----------   ---------   ---------   --------   --------
Cash at end of period.................... $   877,501   $ 419,826   $  17,859   $429,409   $145,455
                                           ==========   =========   =========   ========   ========
</TABLE>
    
 
Supplemental information on non-cash investing activities
 
During 1992, the Partnership sold an interest in oil and gas property in
exchange for cash of $3,461 and stock with a fair market value of $14,420. See
Note 4 for additional information on the transaction.
 
                See accompanying notes to financial statements.
 
                                      F-43
<PAGE>   193
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1990-1, L.P.
 
                         NOTES TO FINANCIAL STATEMENTS
                  YEARS ENDED DECEMBER 31, 1992, 1993 AND 1994
   
            AND (UNAUDITED) SIX MONTHS ENDED JUNE 30, 1994 AND 1995
    
 
NOTE 1 -- ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
  Organization
 
     Benton Oil & Gas Combination Partnership 1990-1, L.P. (Partnership) was
formed to invest in oil and natural gas by acquiring proven producing
properties, recompleting previously drilled wells and developing and drilling
new wells.
 
     Benton Oil and Gas Company (Benton) and a wholly owned subsidiary are the
Co-Managing General Partners and as such conduct, direct and exercise full
control over all activities of the Partnership.
 
  Marketable Equity Securities
 
     Marketable equity securities are stated at the lower of aggregate cost or
market. At December 31, 1993, the cost of marketable equity securities was
$14,420 with a valuation allowance of $9,013 for an approximate market value of
$5,407. Marketable equity securities were sold in November 1994 for $7,672 for a
realized gain of $2,265.
 
  Oil and Gas Properties
 
   
     Oil and gas properties are accounted for using the successful efforts
method. Under this method, costs of drilling exploratory wells are initially
capitalized pending determination of whether the well can produce proved
reserves. All costs relating to nonproductive exploratory wells are expensed.
Costs relating to productive exploratory wells and all development wells are
capitalized and depleted on a units-of-production basis over the life of the
remaining proved developed reserves. Delay rentals and geological and
geophysical costs are expensed as incurred. Proved properties are reviewed
periodically on a property-by-property basis for impairment by comparing
capitalized costs to undiscounted estimated future cash flows from the
properties. Unproved oil and gas properties are periodically assessed for
impairment of value and a loss is recognized as appropriate.
    
 
  Organization Costs
 
     Organization costs are amortized over a period of five years using the
straight-line method.
 
  Income Taxes
 
   
     No provision has been made for income taxes as the liability for such taxes
is that of the partners rather than of the Partnership. At December 31, 1993 and
1994, the financial statement bases of the Partnership's assets exceeded their
tax bases by $451,217 and $338,528, respectively.
    
 
  Interim Reporting
 
   
     In the opinion of the Partnership, the accompanying unaudited consolidated
financial statements contain all adjustments (consisting of only normal
recurring accruals) necessary to present fairly the financial position as of
June 30, 1995, and the results of operations for the six month periods ended
June 30, 1994 and 1995.
    
 
   
     The results of operations for the six month period ended June 30, 1995 are
not necessarily indicative of the results to be expected for the full year.
    
 
                                      F-44
<PAGE>   194
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1990-1, L.P.
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 2 -- PARTICIPATION IN COSTS AND REVENUES
 
     Under the terms of the Partnership agreement, the general and limited
partners (Participants) pay 99% of the lease acquisition, geophysical and
seismic costs, well costs, and organization and offering expenses, including
commissions, while the Co-Managing General Partners pay 1% of such costs.
General and administrative expenses and lease operating expenses are shared
74.25% by the Participants and 25.75% by the Co-Managing General Partners.
Revenues and production taxes are allocated 73.5974% to the Participants,
25.5236% to the Co-Managing General Partners and 0.879% to broker/dealers
(Special Limited Partners) who met certain minimum sales requirements in the
initial offering of the Partnership units.
 
NOTE 3 -- RELATED PARTY TRANSACTIONS
 
     The Partnership pays the Co-Managing General Partners for general and
administrative expenses, lease operating expenses and well costs incurred on
behalf of the Partnership. Benton pays the Partnership for revenues collected on
behalf of the Partnership.
 
NOTE 4 -- OIL AND GAS PROPERTIES
 
     During 1992, a provision for impairment of oil and gas properties was made
to reflect reductions in the estimated value of reserves.
 
     In April 1992, a working interest in a California well was sold. Proceeds
from the sale of the Partnership's interest were $17,881, consisting of cash and
stock of the company purchasing the well. In addition, the Partnership retained
a production payment of $8,845 to be paid from monthly net income from the well.
 
     In September 1992, the Partnership's interest in its remaining California
oil and gas wells were sold for net proceeds of $19,386.
 
     In March 1995, the Partnership sold its 0.32% working interest in certain
depths (above approximately 10,575 feet) in the West Cote Blanche Bay Field for
a purchase price of $146,900. The sales price has been reflected as property
held for sale at December 31, 1994. Impairment of $13,569 has been recorded to
reflect the anticipated loss in connection with the sale of the property.
 
   
     In June 1995, the Partnership entered into an agreement to sell its
principal oil and gas properties. The sales price is subject to adjustments for
revenues, expenses and capital expenditures related to the properties until the
closing date. The agreement is subject to the approval of 75% of the partners. A
provision for impairment was made during the six months ended June 30, 1995 to
reflect the excess of book value over the adjusted sales price of $930,865. The
adjusted sales price has been reflected as property held for sale at June 30,
1995.
    
 
NOTE 5 -- COMMITMENTS AND CONTINGENCIES
 
     On June 13, 1994, certain limited partners of the Partnership, with limited
partners of other Benton partnerships, brought an action against Benton in
connection with its operation of the partnerships as managing general partner.
The parties have agreed to submit the dispute to arbitration and the lawsuit has
been dismissed. The plaintiffs seek actual and punitive damages for alleged
actions and omissions of Benton in connection with operating the partnerships
and alleged misrepresentations made by Benton in selling the limited partnership
interests. At this time, the Partnership has not been named a defendant in this
action. However, if the Partnership is added as a defendant, the Partnership
would be forced to expend financial resources to defend or resolve any such
matters. Benton does not believe that the Partnership will be adversely affected
by this action.
 
                                      F-45
<PAGE>   195
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1990-1, L.P.
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
NOTE 6 -- OIL AND GAS ACTIVITIES
 
     Total costs incurred in oil and gas exploration and development were:
 
<TABLE>
<CAPTION>
                                                     1992            1993            1994
                                                  -----------     -----------     -----------
    <S>                                           <C>             <C>             <C>
    Development costs...........................  $   151,217     $   179,512     $   123,113
    Exploration costs...........................        7,714           9,570           6,607
                                                  -----------     -----------     -----------
                                                  $   158,931     $   189,082     $   129,720
                                                   ==========      ==========      ==========
</TABLE>
 
     The Partnership's aggregate amount of capitalized costs related to oil and
gas producing activities consists of the following at December 31:
 
<TABLE>
<CAPTION>
                                                     1992            1993            1994
                                                  -----------     -----------     -----------
    <S>                                           <C>             <C>             <C>
    Proved property costs.......................  $ 2,640,886     $ 2,820,398     $ 2,766,755
    Less accumulated depletion..................   (1,234,408)     (1,421,548)     (1,614,158)
                                                  -----------     -----------     -----------
                                                  $ 1,406,478     $ 1,398,850     $ 1,152,597
                                                   ==========      ==========      ==========
</TABLE>
 
   
QUANTITIES OF OIL AND GAS RESERVES (UNAUDITED)
    
 
     Proved reserves are estimated quantities of crude oil, natural gas and
natural gas liquids which geological and engineering data demonstrate with
reasonable certainty to be recoverable from known reservoirs under existing
economic and operating conditions. Proved developed reserves are those which are
expected to be recovered through existing wells with existing equipment and
operating methods.
 
     The evaluations of the oil and gas reserves were prepared by J.C. White, an
independent petroleum engineer until January 1, 1993, when he became an employee
of Benton.
 
<TABLE>
<CAPTION>
                                                          1992           1993         1994
                                                       -----------     --------     --------
    <S>                                                <C>             <C>          <C>
    PROVED RESERVES -- CRUDE OIL, CONDENSATE (BBLS)
      BALANCE, JANUARY 1 ............................    1,466,208      256,792      168,418
         Revisions of previous estimates.............     (853,994)     (69,856)        (311)
         Extensions, discoveries and improved
           recovery..................................       16,809                       917
         Production..................................      (26,184)     (18,518)     (17,179)
         Sales of reserves in place..................     (346,047)                  (81,035)
                                                       -----------     --------     --------
      BALANCE, DECEMBER 31 ..........................      256,792      168,418       70,810
                                                        ==========     ========     ========
    PROVED DEVELOPED RESERVES AT DECEMBER 31.........      240,281      153,192       69,682
                                                        ==========     ========     ========
    PROVED RESERVES -- NATURAL GAS (MCF)
      BALANCE, JANUARY 1 ............................      972,607     1,572,670     972,011
         Revisions of previous estimates.............      672,297     (453,913)    (218,429)
         Extensions, discoveries and improved
           recovery..................................       73,243                    34,097
         Production..................................     (145,477)    (146,746)    (127,779)
                                                       -----------     --------     --------
      BALANCE, DECEMBER 31 ..........................    1,572,670      972,011      659,900
                                                        ==========     ========     ========
    PROVED DEVELOPED RESERVES AT DECEMBER 31.........    1,503,774      888,739      549,429
                                                        ==========     ========     ========
</TABLE>
 
- ---------------
(1) The Securities and Exchange Commission requires the reserve presentation to
    be calculated using year-end prices and costs and assuming a continuation of
    existing economic conditions. Proved reserves cannot be measured exactly,
    and the estimation of reserves involves judgmental determinations. Reserve
 
                                      F-46
<PAGE>   196
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1990-1, L.P.
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
    estimates must be reviewed and adjusted periodically to reflect additional
    information gained from reservoir performance, new geological and
    geophysical data and economic changes. The above estimates are based on
    current technology and economic conditions, and Benton considers such
    estimates to be reasonable and consistent with current knowledge of the
    characteristics and extent of production. The estimates include only those
    amounts considered to be Proved Reserves and do not include additional
    amounts which may result from new discoveries in the future, or from
    application of secondary and tertiary recovery processes where facilities
    are not in place.
 
(2) Proved Developed Reserves are reserves which can be expected to be recovered
    through existing wells with existing equipment and operating methods. This
    classification includes:
 
          (a) Proved developed producing reserves which are reserves expected to
              be recovered through existing completion intervals now open for
              production in existing wells; and
 
          (b) Proved developed nonproducing reserves which are reserves that
              exist behind the casing of existing wells which are expected to be
              produced in the predictable future, where the cost of making such
              oil and gas available for production should be relatively small
              compared to the cost of a new well.
 
              Any reserves expected to be obtained through the application of
              fluid injection or other improved recovery techniques for
              supplementing primary recovery methods are included as Proved
              Developed Reserves only after testing by a pilot project or after
              the operation of an installed program has confirmed through
              production response that increased recovery will be achieved.
 
(3) Proved Undeveloped Reserves are Proved Reserves which are expected to be
    recovered from new wells on undrilled acreage or from existing wells where a
    relatively major expenditure is required for recompletion. Reserves on
    undrilled acreage are limited to those drilling units offsetting productive
    units, which are reasonably certain of production when drilled.
 
     Proved Reserves for other undrilled units are claimed only where it can be
     demonstrated with certainty that there is continuity of production from the
     existing productive formation. No estimates for Proved Undeveloped Reserves
     are attributable to or included in this table for any acreage for which an
     application of fluid injection or other improved recovery technique is
     contemplated unless proved effective by actual tests in the area and in the
     same reservoir.
 
(4) Changes in previous estimates of proved reserves result from new information
    obtained from production history and changes in economic factors. Also,
    additional production data at West Cote Blanche Bay enabled Benton to better
    conform estimates of future production to historical trends.
 
STANDARDIZED MEASURE OF DISCOUNTED FUTURE NET CASH FLOWS RELATING TO PROVED OIL
AND GAS RESERVE QUANTITIES (UNAUDITED)
 
     The standardized measure of discounted future net cash flows is presented
in accordance with the provisions of SFAS No. 69. In preparing this data,
assumptions and estimates have been used, and Benton cautions against viewing
this information as a forecast of future economic conditions.
 
     Future cash inflows were estimated by applying year-end prices, adjusted
for fixed and determinable escalations provided by contract, to the estimated
future production of year-end proved reserves. Future cash inflows were reduced
by estimated future production and development costs to determine pre-tax cash
inflows. The resultant future net cash inflows are discounted using a ten
percent discount rate.
 
                                      F-47
<PAGE>   197
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1990-1, L.P.
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
<TABLE>
<CAPTION>
                                                                      DECEMBER 31,
                                                       ------------------------------------------
                                                          1992            1993            1994
                                                       -----------     -----------     ----------
<S>                                                    <C>             <C>             <C>
STANDARDIZED MEASURE
  Future cash inflow.................................  $ 7,470,000     $ 4,637,000     $2,205,000
  Future production costs............................   (2,714,000)     (1,740,000)      (775,000)
  Other related future costs.........................     (514,000)       (442,000)       (55,000)
                                                       -----------     -----------     ----------
  Future net revenue.................................    4,242,000       2,455,000      1,375,000
  10% annual discount for estimated timing of cash
     flows...........................................   (2,020,000)       (604,000)      (318,000)
                                                       -----------     -----------     ----------
  Standardized measure of discounted future net cash
     flows...........................................  $ 2,222,000     $ 1,851,000     $1,057,000
                                                        ==========      ==========      =========
</TABLE>
 
<TABLE>
<CAPTION>
                                                                YEARS ENDED DECEMBER 31,
                                                       ------------------------------------------
                                                          1992            1993            1994
                                                       -----------     -----------     ----------
<S>                                                    <C>             <C>             <C>
CHANGES IN STANDARDIZED MEASURE
  Balance, January 1.................................  $ 3,907,000     $ 2,222,000     $1,851,000
  Changes resulting from:
  Sales of oil and gas, net of related costs.........     (450,000)       (376,000)      (255,000)
  Revisions to estimates of proved reserves:
     Pricing.........................................       34,000        (163,000)      (295,000)
     Quantities......................................   (1,101,000)       (108,000)      (202,000)
  Sales of reserves in place.........................     (824,000)                      (114,000)
  Extensions, discoveries and improved recovery, net
     of future costs.................................      124,000                         35,000
  Accretion of discount..............................      391,000         222,000        185,000
  Development costs incurred.........................      141,000          54,000         57,000
  Changes in timing and other........................                                    (205,000)
                                                       -----------     -----------     ----------
  Balance, December 31...............................  $ 2,222,000     $ 1,851,000     $1,057,000
                                                        ==========      ==========      =========
</TABLE>
 
                                      F-48
<PAGE>   198
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1991-1, L.P.
 
                         INDEX TO FINANCIAL STATEMENTS
 
   
<TABLE>
<CAPTION>
                                                                                        PAGE
                                                                                        ----
<S>                                                                                     <C>
Independent Auditors' Report........................................................    F-50
Balance Sheets at December 31, 1993 and 1994 and June 30, 1995......................    F-51
Statements of Operations for the Years Ended December 31, 1992, 1993 and 1994 and
  the Six Months Ended June 30, 1994 and 1995.......................................    F-52
Statements of Partners' Capital for the Years Ended December 31, 1992, 1993 and 1994
  and the Six Months Ended June 30, 1995............................................    F-53
Statements of Cash Flows for the Years Ended December 31, 1992, 1993 and 1994 and
  the Six Months Ended June 30, 1994 and 1995.......................................    F-54
Notes to Financial Statements for the Years Ended December 31, 1992, 1993 and 1994
  and the Six Months Ended June 30, 1994 and 1995...................................    F-55
</TABLE>
    
 
                                      F-49
<PAGE>   199
 
                          INDEPENDENT AUDITORS' REPORT
 
Benton Oil & Gas Combination Partnership 1991-1, L.P.
Carpinteria, California
 
We have audited the accompanying balance sheets of Benton Oil & Gas Combination
Partnership 1991-1, L.P. as of December 31, 1994 and 1993, and the related
statements of operations, partners' capital, and cash flows for each of the
three years in the period ended December 31, 1994. These financial statements
are the responsibility of the Partnership's management. Our responsibility is to
express an opinion on these financial statements based on our audits.
 
We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
In our opinion, such financial statements present fairly, in all material
respects, the financial position of Benton Oil & Gas Combination Partnership
1991-1, L.P., at December 31, 1994 and 1993, and the results of its operations
and its cash flows for each of the three years in the period ended December 31,
1994 in conformity with generally accepted accounting principles.
 
Deloitte & Touche LLP
 
Los Angeles, California
 
March 31, 1995
 
                                      F-50
<PAGE>   200
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1991-1, L.P.
 
                                 BALANCE SHEETS
 
   
<TABLE>
<CAPTION>
                                                                 DECEMBER 31,
                                                             ---------------------     JUNE 30,
                                                               1993         1994         1995
                                                             --------     --------     ---------
                                                                                       (UNAUDITED)
<S>                                                          <C>          <C>          <C>
                                      ASSETS
Current Assets:
  Cash.....................................................  $177,180     $ 60,170     $  82,547
  Receivable from Co-Managing General Partners.............     4,958        7,897         3,169
  Marketable equity securities.............................     5,407
  Property held for sale (Note 4)..........................                 29,200       185,282
                                                             --------     --------     ---------
     Total Current Assets..................................   187,545       97,267       270,998
Oil and Gas Properties (net of accumulated depletion of
  $138,392, $192,942 and $23,188, respectively)............   441,188      340,737        49,243
Organization Costs (net of accumulated amortization of
  $2,308, $3,231 and $3,692, respectively).................     2,308        1,385           924
                                                             --------     --------     ---------
     Total Assets..........................................  $631,041     $439,389     $ 321,165
                                                             ========     ========      ========
                                PARTNERS' CAPITAL
Commitments and Contingencies (Note 5)
Partners' Capital:
  Co-Managing General Partners' capital....................  $ 50,358     $ 13,601     $  12,820
  Participants' capital....................................   580,591      425,503       307,888
  Special Limited Partners' Capital........................        92          285           457
                                                             --------     --------     ---------
     Total Partners' Capital...............................  $631,041     $439,389     $ 321,165
                                                             ========     ========      ========
</TABLE>
    
 
                See accompanying notes to financial statements.
 
                                      F-51
<PAGE>   201
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1991-1, L.P.
 
                            STATEMENTS OF OPERATIONS
 
   
<TABLE>
<CAPTION>
                                                                                  SIX MONTHS
                                          YEARS ENDED DECEMBER 31,              ENDED JUNE 30,
                                     ----------------------------------     ----------------------
                                       1992         1993         1994         1994         1995
                                     --------     --------     --------     --------     ---------
                                                                            (UNAUDITED)
<S>                                  <C>          <C>          <C>          <C>          <C>
Revenues
  Oil and gas sales................  $129,990     $107,181     $ 96,034     $ 50,419     $  44,075
  Other income.....................    30,331        5,343        2,610        1,769           777
                                     --------     --------     --------     --------     ---------
                                      160,321      112,524       98,644       52,188        44,852
                                     --------     --------     --------     --------     ---------
Expenses
  Lease operating costs and
     production taxes..............    40,093       36,276       38,002       14,599        12,553
  Exploration costs................     7,245        1,284          769          515           361
  Loss on sale of oil and gas
     property......................    61,225                                                  225
  Depletion, impairment and
     amortization..................    65,241       60,503       95,497       32,435       119,437
  General and administrative.......    28,876       45,195       28,823       25,981        30,500
                                     --------     --------     --------     --------     ---------
                                      202,680      143,258      163,091       73,530       163,076
                                     --------     --------     --------     --------     ---------
     Net Loss......................  $(42,359)    $(30,734)    $(64,447)    $(21,342)    $(118,224)
                                     ========     ========     ========     ========     =========
</TABLE>
    
 
                See accompanying notes to financial statements.
 
                                      F-52
<PAGE>   202
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1991-1, L.P.
 
                        STATEMENTS OF PARTNERS' CAPITAL
              FOR THE YEARS ENDED DECEMBER 31, 1992, 1993 AND 1994
   
                 AND (UNAUDITED) SIX MONTHS ENDED JUNE 30, 1995
    
 
   
<TABLE>
<CAPTION>
                                               CO-MANAGING                      SPECIAL
                                                 GENERAL                        LIMITED
                                                PARTNERS       PARTICIPANTS     PARTNERS       TOTAL
                                               -----------     ------------     --------     ---------
<S>                                            <C>             <C>              <C>          <C>
Balance, January 1, 1992.....................   $  18,413       $   912,292     $    321     $ 931,026
Net income (loss)............................      24,981           (67,846)         506       (42,359)
Distributions................................                      (111,600)                  (111,600)
                                               -----------     ------------     --------     ---------
Balance, December 31, 1992...................      43,394           732,846          827       777,067
Net income (loss)............................       9,500           (40,655)         421       (30,734)
Distributions................................      (2,536)         (111,600)      (1,156)     (115,292)
                                               -----------     ------------     --------     ---------
Balance, December 31, 1993...................      50,358           580,591           92       631,041
Net income (loss)............................       6,566           (71,387)         374       (64,447)
Distributions................................     (43,323)          (83,701)        (181)     (127,205)
                                               -----------     ------------     --------     ---------
Balance, December 31, 1994...................      13,601           425,503          285       439,389
Net income (loss) (unaudited)................        (781)         (117,615)         172      (118,224)
                                               -----------     ------------     --------     ---------
Balance, June 30, 1995 (unaudited)...........   $  12,820       $   307,888     $    457     $ 321,165
                                               ==========         =========      =======     =========
</TABLE>
    
 
                See accompanying notes to financial statements.
 
                                      F-53
<PAGE>   203
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1991-1, L.P.
 
                            STATEMENTS OF CASH FLOWS
 
   
<TABLE>
<CAPTION>
                                                                                   SIX MONTHS
                                        YEARS ENDED DECEMBER 31,                 ENDED JUNE 30,
                                 ---------------------------------------     ----------------------
                                    1992           1993          1994          1994         1995
                                 -----------     ---------     ---------     --------     ---------
                                                                             (UNAUDITED)
<S>                              <C>             <C>           <C>           <C>          <C>
Cash flows from operating
  activities:
  Net Loss.....................  $   (42,359)    $ (30,734)    $ (64,447)    $(21,342)    $(118,224)
  Adjustments to reconcile net
     loss to net cash provided
     by (used in) operating
     activities:
     Depletion, impairment and
       amortization............       65,241        60,503        95,497       32,435       119,437
     Dryhole costs.............        1,732
     Loss on sale of oil and
       gas property............       61,225                                                    225
     Realized gain on sale of
       marketable equity
       securities..............                                   (2,292)
     Unrealized loss on
       marketable equity
       securities..............                      9,013                        451
                                 -----------     ---------     ---------     --------     ---------
     Net cash provided by
       operating activities....       85,839        38,782        28,758       11,544         1,438
                                 -----------     ---------     ---------     --------     ---------
Cash flows from investing
  activities:
  Expenditures on oil and gas
     properties................      (32,154)      (35,786)      (23,323)      (8,686)      (12,989)
  Proceeds from sale of
     marketable equity
     securities................                                    7,699
  Proceeds from sale of oil and
     gas properties............        3,461                                                 29,200
                                 -----------     ---------     ---------     --------     ---------
  Net cash provided by (used
     in) investing
     activities................      (28,693)      (35,786)      (15,624)      (8,686)       16,211
                                 -----------     ---------     ---------     --------     ---------
Cash flows from financing
  activities:
  Net (increase) decrease in
     receivable from
     Co-Managing General
     Partners..................     (449,926)       12,283        (2,939)      (1,087)        4,728
  Decrease in payable to
     Affiliate.................     (451,446)
  Partner distributions........     (111,600)     (115,292)     (127,205)     (56,546)
                                 -----------     ---------     ---------     --------     ---------
     Net cash provided by (used
       in) financing
       activities..............   (1,012,972)     (103,009)     (130,144)     (57,633)        4,728
                                 -----------     ---------     ---------     --------     ---------
Net increase (decrease) in
  cash.........................     (955,826)     (100,013)     (117,010)     (54,775)       22,377
Cash at beginning of period....    1,233,019       277,193       177,180      177,180        60,170
                                 -----------     ---------     ---------     --------     ---------
Cash at end of period..........  $   277,193     $ 177,180     $  60,170     $122,405     $  82,547
                                  ==========     =========     =========     ========     =========
</TABLE>
    
 
Supplemental information on non-cash investing activities
 
During 1992, the Partnership sold an interest in oil and gas property in
exchange for cash of $3,461 and stock with a fair market value of $14,420. See
Note 4 for additional information on the transaction.
 
                See accompanying notes on financial statements.
 
                                      F-54
<PAGE>   204
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1991-1, L.P.
 
                         NOTES TO FINANCIAL STATEMENTS
                  YEARS ENDED DECEMBER 31, 1992, 1993 AND 1994
   
            AND (UNAUDITED) SIX MONTHS ENDED JUNE 30, 1994 AND 1995
    
 
NOTE 1 -- ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
  Organization
 
     Benton Oil & Gas Combination Partnership 1991-1, L.P. (Partnership) was
formed to invest in oil and natural gas by acquiring proven producing
properties, enhancing production of previously drilled wells and drilling new
wells.
 
     Benton Oil and Gas Company (Benton) and a wholly owned subsidiary are the
Co-Managing General Partners and as such conduct, direct and exercise full
control over all activities of the Partnership.
 
  Marketable Equity Securities
 
     Marketable equity securities are stated at the lower of aggregate cost or
market. At December 31, 1993, the cost of marketable equity securities was
$14,420 with a valuation allowance of $9,013 for an approximate market value of
$5,407. Marketable equity securities were sold in November 1994 for $7,699 for a
realized gain of $2,292.
 
  Oil and Gas Properties
 
   
     Oil and gas properties are accounted for using the successful efforts
method. Under this method, costs of drilling exploratory wells are initially
capitalized pending determination of whether the well can produce proved
reserves. All costs relating to nonproductive exploratory wells are expensed.
Costs relating to productive exploratory wells and all development wells are
capitalized and depleted on a units-of-production basis over the life of the
remaining proved developed reserves. Delay rentals and geological and
geophysical costs are expensed as incurred. Proved properties are reviewed
periodically on a property-by-property basis for impairment by comparing
capitalized costs to undiscounted estimated future cash flows from the
properties. Unproved oil and gas properties are periodically assessed for
impairment of value and a loss is recognized as appropriate.
    
 
  Organization Costs
 
     Organization costs are amortized over a period of five years using the
straight-line method.
 
  Income Taxes
 
   
     No provision has been made for income taxes as the liability for such taxes
is that of the partners rather than of the Partnership. At December 31, 1993 and
1994, the financial statement bases of the Partnership's assets exceeded their
tax bases by $76,407 and $28,601, respectively.
    
 
  Interim Reporting
 
   
     In the opinion of the Partnership, the accompanying unaudited consolidated
financial statements contain all adjustments (consisting of only normal
recurring accruals) necessary to present fairly the financial position as of
June 30, 1995, and the results of operations for the six month periods ended
June 30, 1994 and 1995.
    
 
   
     The results of operations for the six month period ended June 30, 1995 are
not necessarily indicative of the results to be expected for the full year.
    
 
NOTE 2 -- PARTICIPATION IN COSTS AND REVENUES
 
     Under the terms of the Partnership agreement, the general and limited
partners (Participants) pay 99% of the lease acquisition, geophysical and
seismic costs, well costs, and organization and offering expenses,
 
                                      F-55
<PAGE>   205
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1991-1, L.P.
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
including commissions, while the Co-Managing General Partners pay 1% of such
costs. For the first twelve months of the Partnership, general and
administrative expenses are covered by a fee, equal to 3% of initial capital
raised, paid by the Partnership to Benton. The fee is paid 99% by the
Participants and 1% by the Co-Managing General Partners. General and
administrative expenses after the first twelve months and lease operating
expenses are shared 74.25% by the Participants and 25.75% by the Co-Managing
General Partners. Revenues and production taxes are allocated 73.944% to the
Participants, 25.6438% to the Co-Managing General Partners, and .4122% to
broker/dealers (Special Limited Partners) who met certain minimum sales
requirements in the initial offering of the Partnership units.
 
NOTE 3 -- RELATED PARTY TRANSACTIONS
 
     The Partnership pays the Co-Managing General Partners for syndication
costs, organization costs, general and administrative expenses, lease operating
expenses and well costs incurred on behalf of the Partnership. Benton pays the
Partnership for revenues collected on behalf of the Partnership.
 
NOTE 4 -- OIL AND GAS PROPERTIES
 
     In April 1992, a working interest in a California well was sold. Proceeds
from the sale of the Partnership's interest were $17,881 consisting of cash and
stock of the company purchasing the well. In addition, the Partnership retained
a production payment of $8,845 to be paid from monthly net income from the well.
 
     In March 1995, the Partnership sold its 0.06% working interest in certain
depths (above approximately 10,575 feet) in the West Cote Blanche Bay Field for
a purchase price of $29,200. The sales price has been reflected as property held
for sale at December 31, 1994. Impairment of $34,371 has been recorded to
reflect the anticipated loss in connection with the sale of the property.
 
   
     In June 1995, the Partnership entered into an agreement to sell its
principal oil and gas properties. The sales price is subject to adjustments for
revenues, expenses and capital expenditures related to the properties until the
closing date. The agreement is subject to the approval of 75% of the partners. A
provision for impairment was made during the six months ended June 30, 1995 to
reflect the excess of book value over the sales price of $185,282. The adjusted
sales price has been reflected as property held for sale at June 30, 1995.
    
 
NOTE 5 -- COMMITMENTS AND CONTINGENCIES
 
     On June 13, 1994 certain limited partners of the Partnership, with limited
partners of other Benton and partnerships, brought an action against Benton in
connection with its operation of the partnerships as managing general partner.
The parties have agreed to submit the dispute to arbitration and the lawsuit has
been dismissed. The plaintiffs seek actual and punitive damages for alleged
actions and omissions of Benton in connection with operating the partnerships
and alleged misrepresentations made by Benton in selling the limited partnership
interests. At this time, the Partnership has not been named a defendant in this
action. However, if the Partnership is added as a defendant, the Partnership
would be forced to expend financial resources to defend or resolve any such
matters. Benton does not believe that the Partnership will be adversely affected
by this action.
 
NOTE 6 -- OIL AND GAS ACTIVITIES
 
     Total costs incurred in oil and gas exploration and development were:
 
<TABLE>
<CAPTION>
                                                         1992         1993          1994
                                                       --------     ---------     ---------
    <S>                                                <C>          <C>           <C>
    Development costs................................  $ 32,154     $  35,786     $  23,323
    Exploration costs................................     5,513         1,284           769
                                                       --------     ---------     ---------
                                                       $ 37,667     $  37,070     $  24,092
                                                       ========     =========     =========
</TABLE>
 
                                      F-56
<PAGE>   206
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1991-1, L.P.
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
     The Partnership's aggregate amount of capitalized costs related to oil and
gas producing activities consists of the following at December 31:
 
<TABLE>
<CAPTION>
                                                         1992         1993          1994
                                                       --------     ---------     ---------
    <S>                                                <C>          <C>           <C>
    Proved property costs............................  $543,794     $ 579,580     $ 533,679
    Less accumulated depletion.......................   (78,812)     (138,392)     (192,942)
                                                       --------     ---------     ---------
                                                       $464,982     $ 441,188     $ 340,737
                                                       ========     =========     =========
</TABLE>
 
   
QUANTITIES OF OIL AND GAS RESERVES (UNAUDITED)
    
 
     Proved reserves are estimated quantities of crude oil, natural gas and
natural gas liquids which geological and engineering data demonstrate with
reasonable certainty to be recoverable from known reservoirs under existing
economic and operating conditions. Proved developed reserves are those which are
expected to be recovered through existing wells with existing equipment and
operating methods.
 
     The evaluations of the oil and gas reserves were prepared by J.C. White, an
independent petroleum engineer until January 1, 1993, when he became an employee
of Benton.
 
<TABLE>
<CAPTION>
                                                           1992         1993         1994
                                                          -------     --------      -------
    <S>                                                   <C>         <C>           <C>
    PROVED RESERVES -- CRUDE OIL, CONDENSATE (BBLS)
      BALANCE, JANUARY 1...............................    45,659       51,079       33,564
         Revisions of previous estimates...............     7,730      (13,829)        (140)
         Extensions, discoveries and improved
           recovery....................................     3,346                       182
         Production....................................    (4,727)      (3,686)      (3,420)
         Sales of reserves in place....................      (929)                  (16,090)
                                                          -------     --------      -------
      BALANCE, DECEMBER 31.............................    51,079       33,564       14,096
                                                          =======     ========      =======
    PROVED DEVELOPED RESERVES AT DECEMBER 31...........    47,808       30,517       13,871
                                                          =======     ========      =======
    PROVED RESERVES -- NATURAL GAS (MCF)
      BALANCE, JANUARY 1...............................   162,291      313,037      145,219
         Revisions of previous estimates...............   165,388     (149,562)        (853)
         Extensions, discoveries and improved
           recovery....................................     4,580                     6,787
         Production....................................   (19,222)     (18,256)     (19,815)
                                                          -------     --------      -------
      BALANCE, DECEMBER 31.............................   313,037      145,219      131,338
                                                          =======     ========      =======
    PROVED DEVELOPED RESERVES AT DECEMBER 31...........   299,325      128,656      109,362
                                                          =======     ========      =======
</TABLE>
 
- ---------------
(1) The Securities and Exchange Commission requires the reserve presentation to
    be calculated using year-end prices and costs and assuming a continuation of
    existing economic conditions. Proved reserves cannot be measured exactly,
    and the estimation of reserves involves judgmental determinations. Reserve
    estimates must be reviewed and adjusted periodically to reflect additional
    information gained from reservoir performance, new geological and
    geophysical data and economic changes. The above estimates are based on
    current technology and economic conditions, and Benton considers such
    estimates to be reasonable and consistent with current knowledge of the
    characteristics and extent of production. The estimates include only those
    amounts considered to be Proved Reserves and do not include additional
    amounts which may result from new discoveries in the future, or from
    application of secondary and tertiary recovery processes where facilities
    are not in place.
 
(2) Proved Developed Reserves are reserves which can be expected to be recovered
    through existing wells with existing equipment and operating methods. This
    classification includes:
 
                                      F-57
<PAGE>   207
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1991-1, L.P.
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
          (a) Proved developed producing reserves which are reserves expected to
              be recovered through existing completion intervals now open for
              production in existing wells; and
 
          (b) Proved developed nonproducing reserves which are reserves that
              exist behind the casing of existing wells which are expected to be
              produced in the predictable future, where the cost of making such
              oil and gas available for production should be relatively small
              compared to the cost of a new well.
 
            Any reserves expected to be obtained through the application of
            fluid injection or other improved recovery techniques for
            supplementing primary recovery methods are included as Proved
            Developed Reserves only after testing by a pilot project or after
            the operation of an installed program has confirmed through
            production response that increased recovery will be achieved.
 
(3) Proved Undeveloped Reserves are Proved Reserves which are expected to be
    recovered from new wells on undrilled acreage or from existing wells where a
    relatively major expenditure is required for recompletion. Reserves on
    undrilled acreage are limited to those drilling units offsetting productive
    units, which are reasonably certain of production when drilled.
 
    Proved Reserves for other undrilled units are claimed only where it can be
    demonstrated with certainty that there is continuity of production from the
    existing productive formation. No estimates for Proved Undeveloped Reserves
    are attributable to or included in this table for any acreage for which an
    application of fluid injection or other improved recovery technique is
    contemplated unless proved effective by actual tests in the area and in the
    same reservoir.
 
(4) Changes in previous estimates of proved reserves result from new information
    obtained from production history and changes in economic factors. Also,
    additional production data at West Cote Blanche Bay enabled Benton to better
    conform estimates of future production to historical trends.
 
STANDARDIZED MEASURE OF DISCOUNTED FUTURE NET CASH FLOWS RELATING TO PROVED OIL
AND GAS RESERVE QUANTITIES (UNAUDITED)
 
     The standardized measure of discounted future net cash flows is presented
in accordance with the provisions of SFAS No. 69. In preparing this data,
assumptions and estimates have been used, and Benton cautions against viewing
this information as a forecast of future economic conditions.
 
     Future cash inflows were estimated by applying year-end prices, adjusted
for fixed and determinable escalations provided by contract, to the estimated
future production of year-end proved reserves. Future cash inflows were reduced
by estimated future production and development costs to determine pre-tax cash
inflows. The resultant future net cash inflows are discounted using a ten
percent discount rate.
 
<TABLE>
<CAPTION>
                                                                       DECEMBER 31
                                                          --------------------------------------
                                                             1992          1993          1994
                                                          ----------     ---------     ---------
<S>                                                       <C>            <C>           <C>
STANDARDIZED MEASURE
  Future cash inflow....................................  $1,486,000     $ 818,000     $ 439,000
  Future production costs...............................    (539,000)     (279,000)     (155,000)
  Other related future costs............................    (102,000)      (88,000)      (11,000)
                                                          ----------     ---------     ---------
  Future net revenue....................................     845,000       451,000       273,000
  10% annual discount for estimated timing of cash
     flows..............................................    (402,000)     (113,000)      (63,000)
                                                          ----------     ---------     ---------
  Standardized measure of discounted future net
     cash flows.........................................  $  443,000     $ 338,000     $ 210,000
                                                           =========     =========     =========
</TABLE>
 
                                      F-58
<PAGE>   208
 
             BENTON OIL & GAS COMBINATION PARTNERSHIP 1991-1, L.P.
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
<TABLE>
<CAPTION>
                                                                 YEARS ENDED DECEMBER 31,
                                                          --------------------------------------
                                                             1992          1993          1994
                                                          ----------     ---------     ---------
<S>                                                       <C>            <C>           <C>
CHANGES IN STANDARDIZED MEASURE
  Balance, January 1 ...................................  $  382,000     $ 443,000     $ 338,000
  Changes resulting from:
  Sales of oil and gas, net of related costs............     (90,000)      (71,000)      (58,000)
  Revisions to estimates of proved reserves:
     Pricing............................................       8,000        (6,000)      (63,000)
     Quantities.........................................      45,000       (83,000)       (2,000)
  Sales of reserves in place............................      10,000                     (23,000)
  Extensions, discoveries and improved recovery, net of
     future costs.......................................      18,000                       7,000
  Accretion of discount.................................      38,000        44,000        34,000
  Development costs incurred............................      32,000        11,000        11,000
  Changes in timing and other...........................                                 (34,000)
                                                          ----------     ---------     ---------
  Balance, December 31 .................................  $  443,000     $ 338,000     $ 210,000
                                                           =========     =========     =========
</TABLE>
 
                                      F-59
<PAGE>   209
                                                                Exhibit A
                               WARRANT AGREEMENT

                                    BETWEEN

                           BENTON OIL AND GAS COMPANY

                                      and





                      Dated as of                   , 1995
                                  -----------------
<PAGE>   210
        WARRANT AGREEMENT dated as of________________, 1995 (the "Agreement"),  
between Benton Oil and Gas Company, a Delaware corporation (the  "Company")
and ____________________("Holder").

        WHEREAS, the Company proposes to issue to the Holder common stock 
purchase warrants (the "Warrants") to purchase up to _______shares (the "Warrant
Shares") of the Company's Common Stock, par value $.01 per share (the "Common
Stock"), each Warrant entitling the holder thereof to purchase one share of
Common Stock.

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


        1.   ISSUANCE  OF WARRANTS; FORM OF WARRANT.  The Company will issue 
and deliver the Warrants to Holder, in consideration for, and as part of the
compensation to Holder in connection with the sale of the assets of the
Partnership.  The number of Warrants to be issued and delivered shall be____. 
No cash consideration will be paid by Holder for the Warrants.  The text of each
Warrant, of the purchase form and of each assignment form to be printed on
the reverse thereof shall be substantially as set  forth in Exhibit A attached
hereto.  The Warrants  shall  be executed on behalf of the Company by the
manual or facsimile signature of the present or any future Chairman of the 
Board, President, Treasurer or Vice President of the Company, under its
corporate seal, affixed or in facsimile, attested by the  manual or facsimile
signature of the present or future Secretary or an Assistant Secretary of the
Company.  A Warrant bearing the manual or facsimile signature of individuals
who were at any  time  the proper officers of the Company shall bind  
the Company notwithstanding that such individuals or any of them shall have
ceased to hold such offices prior to the delivery of such Warrant or did not
hold such offices on the date of this Agreement.

        Warrants shall be dated as of the date of execution thereof by the 
Company either upon initial issuance or upon division, exchange, substitution
or transfer.

        2.   REGISTRATION.  The Warrants shall be numbered and shall be 
registered on the books of the Company (the  "Warrant Register") as they are 
issued.  The Company shall be entitled to treat the registered holder of any  
Warrant on the Warrant Register (the  "Holder") as the owner in fact thereof 
for all purposes and shall not be bound to recognize any equitable or other  
claim to or interest in such Warrant on the part of any other person, and shall 
not be liable for any  registration  or transfer of Warrants which are 
registered or to be registered in the name of a fiduciary or 

                                      1
<PAGE>   211
the nominee of a fiduciary unless made with the actual knowledge that  a 
fiduciary or nominee is committing a breach of trust in requesting such         
registration or transfer,  or with knowledge of such facts that its 
participation therein  amounts to bad faith.  The Warrants shall be  registered
initially in the name of Holder in such denominations as  Holder may request in
writing to the Company.


        3.   EXCHANGE OF WARRANT CERTIFICATES.   Subject to any restriction 
upon  transfer set forth  in  this  Agreement, each Warrant certificate may be
exchanged at the option of the Holder thereof for another certificate or
certificates of different denominations entitling the Holder thereof to 
purchase upon surrender to the Company or its duly authorized agent a  like
aggregate number of Warrant Shares as the certificate or certificates
surrendered then entitle such Holder to purchase. Any Holder  desiring to
exchange a Warrant certificate or certificates shall make such request in
writing delivered to the Company, and shall surrender, properly endorsed, the
certificate or certificates to be so exchanged.  Thereupon, the Company shall
execute  and deliver to the person entitled thereto a new Warrant certificate
or certificates, as the case may be, as so requested. Any Warrant issued upon
exchange, transfer or partial exercise of the Warrants shall be the valid
obligation of the  Company, evidencing the same generic rights and entitled to
the same generic benefits under this Agreement as the Warrants surrendered for
such exchange, transfer or exercise.

        4.   WARRANT TERMS.

        4.1. TERM OF WARRANTS; EXERCISE OF WARRANTS.

             (a)  Each Warrant entitles the Holder thereof to purchase one 
        share of Common Stock subject to adjustment in accordance with Section 
        8 hereof at any time from 9:00 A.M., Los  Angeles time, on           ,
        1995 until 5:00 P.M.,  Los  Angeles time, on               , 1998 (the
        "Expiration  Date") at a purchase price  of  $           per share.

             (b)  The Warrant Price and the number of shares issuable upon
        exercise of Warrants are subject to adjustment upon the occurrence of
        certain events, pursuant to the provisions of Section 8 of this
        Agreement.  Subject to the provisions of this Agreement, each Holder
        shall have the right, which may be exercised as expressed in such
        Warrants, to purchase from the Company (and the Company shall  issue
        and sell to such Holder) the number of fully paid and nonassessable
        shares of Common Stock specified in such Warrants,  upon surrender to
        the Company, or its duly authorized agent, of such Warrants, with the
        purchase  form on  the reverse thereof duly filled in and signed, and
        upon payment to the Company of the Warrant Price, 

                                      2
<PAGE>   212
     
        as adjusted in accordance with the provisions of Section 8 of this      
        Agreement, for the number of shares in respect of which such Warrants
        are then exercised.  Payment of such Warrant Price may  be made only in
        cash, or by certified or official bank check.

        Upon such surrender of Warrants, and payment of the Warrant Price as 
aforesaid, the Company shall issue and cause to be delivered with all
reasonable dispatch to or upon the written order of the Holder and (subject to
receipt  of  evidence  of compliance  with  the act in accordance with the
provisions of Section 10 of this Agreement) in such name or names as the Holder
may  designate, a certificate or certificates for the number of full shares of
Common Stock so purchased upon the  exercise  of such  Warrants, together with
cash, as provided in Section 9 of this  Agreement, in respect of any fraction
of a  share of such stock  otherwise issuable upon such surrender.  Such
certificate or certificates shall be deemed to have  been issued and any person
so designated to be named therein shall be deemed to have become a holder of
record of such shares as of the date of the surrender of such Warrants and
payment of the Warrant  Price  as aforesaid;  PROVIDED, HOWEVER, that if, at
the time of surrender of the  Warrant and payment of such Warrant Price, the
transfer books for the Common Stock or other class of stock purchasable upon
the exercise of the Warrants shall be  closed, the certificates for the shares
in respect of which the Warrants are then exercised shall be issuable as of the
date on which such books shall next be opened whether before,  on or after the
Expiration Date and until such date the Company shall be under no duty  to 
deliver  any  certificate for such shares;  provided, further, however, that
the transfer books shall not be closed at any  one time for a period longer
than five days unless otherwise required by law.  The rights of purchase
represented by  the Warrants shall be exercisable, at the election of the
Holders thereof, either in full or from time to time in part and, in the event
that any Warrant is exercised in respect of less than all of the shares
purchasable on such exercise at any time prior to the Expiration Date, a new
certificate evidencing the  remaining Warrant or Warrants will be issued.


        4.2.  COMPLIANCE WITH GOVERNMENT REGULATIONS.  The Company covenants 
that if any shares of Common Stock required to be reserved for purposes of
exercise or conversion of Warrants require, under any Federal or state law or
applicable  governing rule or regulation of any national  securities exchange,
registration with or approval of any governmental authority, or listing on any
such national securities exchange,  before such shares may be issued upon
exercise, the Company will in good faith and as expeditiously as possible
endeavor to cause such shares to be duly registered, approved or listed on the
relevant national  
                                      3
<PAGE>   213

securities exchange, as the  case may be, PROVIDED, HOWEVER, that in no event
shall such shares of Common Stock be issued,  and the Company is hereby
authorized to suspend the exercise of all Warrants, for the period during 
which  such registration, approval or listing is required but not in effect.

        5.     PAYMENT OF TAXES.  The Company will pay all documentary stamp 
taxes, if any, attributable to the initial issuance of Warrant Shares upon the
exercise of Warrants and any securities issued pursuant to Section 8 hereof;
PROVIDED, HOWEVER, that the Company shall not be required to pay any tax or
taxes which may be payable in respect of any transfer involved in the  issue or
delivery of any Warrants or certificates for Warrant Shares  and any securities
issued pursuant to Section 8 hereof in a name other than that of the Holder of
such Warrants.


        6.     MUTILATED OR MISSING WARRANTS.  In case any of the Warrants 
shall be mutilated, lost, stolen or destroyed, the Company may in its
discretion issue and deliver in exchange and substitution for and upon
cancellation of the mutilated  Warrant, or in lieu of and in substitution for
the Warrant lost, stolen or destroyed,  a new Warrant of like tenor and 
representing an equivalent right or interest; but only upon receipt of 
evidence reasonably satisfactory to the Company of such loss,  theft or
destruction of such Warrant and indemnity or bond, if requested, also 
reasonably satisfactory to the Company.  An applicant for such substitute 
Warrants shall also comply with such other reasonable regulations and pay such
other reasonable charges as the Company may prescribe.


        7.     RESERVATION OF WARRANT SHARES;  PURCHASE AND CANCELLATION OF
WARRANTS.  There have been reserved out of the authorized and unissued shares
of Common  Stock,  a number of shares sufficient to provide for the exercise of
the  rights of purchase represented by the Warrants, and the transfer agent for
the Common Stock ("Transfer Agent") and every subsequent transfer agent for any
shares of the Company's capital stock issuable upon the  exercise of any of the
rights of purchase aforesaid are hereby irrevocably authorized and directed at
all times until the Expiration Date to reserve such number of authorized and
unissued shares as shall be requisite for such purpose.  The Company will keep
a copy of this Agreement on file with the Transfer Agent and with every
subsequent transfer agent for any shares of  the Company's capital stock
issuable upon the exercise of the  rights of purchase represented by the
Warrants.  The Company will supply the  Transfer Agent and any such subsequent
transfer agent with duly executed stock certificates for such purpose and will
itself provide or otherwise  
                                      4
<PAGE>   214
make available any cash which may be issuable as provided in Section 9 of this
Agreement.  The Company will  furnish to the Transfer Agent and any  such       
subsequent transfer  agent a copy of all notices of adjustments, and
certificates related thereto, transmitted to each Holder pursuant to  Section
8.3 hereof.  All Warrants surrendered in the exercise of the rights  thereby
evidenced shall be cancelled, and such cancelled Warrants shall constitute
sufficient evidence of the number of shares of stock which have been issued
upon the exercise of such Warrants (subject to  adjustment as herein provided). 
No shares of stock shall be subject to reservation in respect of the Warrants
subsequent to the Expiration Date  except to  the extent necessary to comply
with the terms of this Agreement.


        8.    ADJUSTMENT OF WARRANT PRICE AND NUMBER OF WARRANT SHARES.   The
number and kind of securities purchasable upon the exercise of each Warrant and
the Warrant Price shall be subject to adjustment from time to time upon the
occurrence of certain events, as hereafter defined.


        8.1.  MECHANICAL ADJUSTMENTS.  The number of Warrant Shares purchasable 
upon the exercise of each Warrant and the Warrant Price shall be subject to
adjustment as follows:

                (a)       In case the Company shall (i) pay a dividend in
        shares of Common Stock or make a distribution in shares of Common
        Stock, (ii) subdivide its outstanding shares of Common Stock, (iii)
        combine its outstanding shares of Common Stock into a smaller number  
        of shares of Common Stock or (iv) issue by reclassification of
        its shares of Common Stock other securities of the Company (including
        any such reclassification in connection with  a consolidation or merger
        in which the Company is the surviving corporation), the number of
        Warrant Shares purchasable upon exercise of each Warrant immediately
        prior thereto shall be adjusted so that the Holder of each Warrant
        shall be entitled to receive the kind and number of Warrant Shares or
        other securities of the Company which he would have owned or have been
        entitled to receive after the happening of any of the events described
        above, had  such  Warrant been exercised immediately prior  to  the
        happening of such event or any record date with respect thereto
        regardless of whether the Warrants are exercisable at the time of the
        happening of such event or at the time of any record date with  respect
        thereto.  An adjustment made pursuant to  this paragraph  (a) shall
        become effective immediately after  the effective date of such event
        retroactive to the record date, if any, for such event.

                                      5
<PAGE>   215

                (b)       In case the Company shall issue rights, options or
        warrants to all holders of its outstanding Common Stock, without any
        charge to such holders, entitling them (for a period expiring within 
        60  days after the record date mentioned  below)  to subscribe for or
        purchase shares of Common Stock at a price per share which is lower at
        the record date mentioned below than the then  current  market price
        per share of  Common  Stock  (as determined in accordance with
        paragraph (e) below), the number of Warrant Shares thereafter
        purchasable upon the exercise of each Warrant shall be determined by
        multiplying the number of Warrant Shares theretofore purchasable upon
        exercise of each Warrant by a fraction, of which the numerator shall be
        the number of shares of Common Stock outstanding on the date of
        issuance of such rights, options or warrants plus the number of
        additional shares  of Common Stock offered for subscription or
        purchase, and of which the denominator shall be the number of shares of
        Common Stock outstanding on the date of issuance of such rights,
        options or warrants plus the number of shares which the aggregate
        offering price of the total number of shares of common stock so offered
        would purchase at the current market price per share of Common Stock 
        at such record date.  Such adjustment shall  be  made whenever such
        rights, options or warrants are issued, and shall become  effective
        immediately after the record date for  the determination of
        stockholders entitled to receive such rights, options or warrants.

                (c)       In case the Company shall distribute to all holders
        of its shares of Common Stock evidences of its indebtedness  or assets
        (excluding cash dividends or distributions payable out of consolidated 
        earnings or earned surplus  and  dividends  or distributions referred
        to in paragraph (a) above or  in  the paragraph  immediately following
        this paragraph) or  rights, options or warrants, or convertible or
        exchangeable securities containing the right to subscribe for or
        purchase shares  of Common  Stock (excluding those referred to in
        paragraph  (b) above), then in each case the number of Warrant Shares
        thereafter purchasable upon the exercise of each Warrant shall be
        determined by  multiplying  the  number of Warrant  Shares  theretofore
        purchasable upon the exercise of each Warrant by a fraction, of which
        the numerator shall be the then current market price per share of
        Common Stock (as determined in accordance with paragraph (e) below) on
        the date of such distribution, and of which the denominator shall be
        the then current market price per share of Common Stock, less the then
        fair value (as determined in good faith  by  the  Board  of Directors
        of  the  Company,  whose determination shall be conclusive) of the
        portion of the assets or  evidences  of  indebtedness so distributed 
        or  of  such subscription rights, options or warrants, or of such
        convertible or exchangeable  

                                      6
<PAGE>   216
     
        securities applicable to one share of Common Stock.   Such  adjustment
        shall be made  whenever  any  such distribution is made, and shall
        become effective on the date of distribution retroactive to the
        record date for the determination of stockholders entitled to receive
        such distribution.

                In the event of distribution by the Company to all holders of
        its  shares of Common Stock of stock of a subsidiary or securities
        convertible into or exercisable for such stock, then in lieu of an
        adjustment in the number of Warrant Shares purchasable upon the
        exercise of each Warrant,  the  Holder of each Warrant, upon the
        exercise thereof at any  time after such distribution, shall be
        entitled to receive from the Company, such subsidiary or both,  as the
        Company shall determine, the stock  or other securities to which such
        Holder would have been entitled if such  Holder had exercised such
        Warrant immediately  prior thereto regardless of whether the Warrants
        are exercisable at such time, all subject to further adjustment as
        provided in this subsection 8.1; PROVIDED, HOWEVER, that  no adjustment
        in respect of cash dividends or interest on such stock or other
        securities shall be made during the term of a Warrant or upon the
        exercise of a Warrant.

                (d)       In case the Company shall sell and issue shares of
        Common Stock (other than pursuant to rights, options, warrants, or
        convertible securities initially issued before the date of this 
        Agreement) or rights, options, warrants or convertible securities
        containing the right to subscribe for or purchase shares  of Common
        Stock (excluding shares, rights,  options, warrants or convertible
        securities issued in  any of the transactions described in paragraphs
        (a), (b) or (c) above) at a price per share of Common Stock
        (determined, in the case of such rights, options, warrants or
        convertible securities, by dividing (w) the total of the amount
        received or receivable by the Company (determined as provided below) in
        consideration of the sale and issuance  of  such rights, options,
        warrants or convertible securities, by (x) the total number of shares
        of Common Stock covered  by  such rights, options, warrants  or 
        convertible securities) lower than the then current market price per
        share of Common Stock (as determined in accordance with paragraph (e)
        below) in effect immediately prior to such sale and issuance, then the
        number of Warrant Shares thereafter purchasable upon the exercise of
        the Warrants shall be determined by multiplying the number of Warrant
        Shares theretofore purchasable upon exercise by a fraction, of which
        the numerator shall be the number of shares of  Common Stock
        outstanding on the date of issuance of such shares, rights, options,
        warrants or convertible securities plus the number of additional shares
        of Common Stock sold or subject to  issuance  pursuant to such rights,
        options, warrants  

                                      7
<PAGE>   217
     
        or convertible securities, and of which the denominator shall be the
        number of shares of Common Stock outstanding on the date  of issuance
        of such shares, rights, options, warrants or convertible       
        securities plus the number of shares of Common Stock which the
        aggregate consideration received or receivable (determined as provided
        below) for such sale or issuance would purchase at such current market
        price per share.  Such adjustment shall be made successively whenever
        such an issuance is made.  For the purposes of such adjustments, the
        consideration received or receivable by the  Company  for rights,
        options, warrants  or  convertible securities shall be deemed to be the
        consideration received by the Company for such rights, options,
        warrants or convertible securities, plus the consideration or premiums
        stated in such rights, options, warrants or convertible securities to
        be paid for the shares of Common Stock covered thereby.  In case the
        Company shall sell and issue shares of Common Stock, or rights,
        options, warrants or convertible securities containing the right to 
        subscribe for or purchase shares of Common Stock, for  a consideration
        consisting, in whole or in part, of property other than cash or its
        equivalent, then in determining the "price per share  of  Common Stock"
        and the "consideration received  or receivable by the Company" for
        purposes of the first sentence of this paragraph (d), the Board of
        Directors shall determine, in its  discretion, the fair value of said
        property,  and  such determination, if made in good faith, shall be
        binding upon all Holders.

                (e)       For the purpose of any computation under paragraphs
        (b), (c) and (d) of this Section, the current market price per share of
        Common Stock at any date shall be the daily closing price of the
        Company's Common Stock, as reported by the Nasdaq National Market.  The
        closing price for such day shall be the last such reported sales price
        regular way or, in case no such reported sale takes place on such day,
        the average of the closing bid and asked prices regular way for such
        day, in each case on the principal national securities exchange on
        which the shares of Common Stock are listed or admitted to trading or,
        if not listed or admitted to trading, the average of the closing bid
        and asked prices of the Common Stock in the over-the-counter market as
        reported by NASDAQ or any comparable system.  In the absence of one  or
        more such quotations, the Board of Directors of  the Company shall
        determine the current market price, in good faith, on the basis of such
        quotations as it considers appropriate. Notwithstanding the foregoing,
        for the purpose of any calculation under paragraph (d) above (A) with
        respect to any issuance of options under the Company's employee or
        director compensation stock option plans as in effect or as adopted by
        the Board of Directors of the Company on the date hereof, the term
        "current market price" in  

                                      8
<PAGE>   218
     
        such instances shall mean the fair market price on the date of the
        issuance of any such option determined in accordance with the Company's
        employee compensation stock option plans as in effect or as adopted by
        the Board of Directors of the Company on the date hereof; (B) with
        respect to any issuances of Common Stock (or rights, options, warrants
        or convertible    securities containing the right to subscribe for or
        purchase shares of Common Stock) in connection with bona fide corporate
        transactions (other than issuances in such transactions for cash or
        similar consideration), the term "fair market price" shall mean the
        fair market price per share as determined in arm's-length negotiations
        by the Company and such other parties (other than  affiliates  or
        subsidiaries of the Company) to such transactions as reflected in the
        definitive documentation with respect thereto, unless such
        determination is not reasonably related  to  the closing market price
        on the  date  of  such determination; and (c) with respect to any
        issuance of the Company's common stock for cash or similar
        consideration in a firm commitment underwriting, the current fair
        market price shall be the price the shares are sold at, regardless of
        whether such price is higher or lower than the quoted price on the date
        of the sale and therefore no adjustment will be made.

                (f)       In any case in which this Section 8.1 shall require
        that any adjustment in the number of Warrant Shares be made effective
        as of immediately after a record date for a specified event, the
        Company may elect to defer until the occurrence of the event the
        issuing to the Holder of any Warrant exercised after that record date
        the shares of Common Stock and other securities of the Company, if any,
        issuable upon the exercise of any Warrant over and above the shares of
        Common Stock and other securities of the Company, if any, issuable upon
        the exercise of any Warrant prior to such adjustment; PROVIDED,
        HOWEVER, that the Company shall  deliver to the holder a due bill or
        other appropriate instrument  evidencing the holder's right  to 
        receive  such additional shares or securities upon the occurrence of
        the event requiring such adjustment.

                (g)       No adjustment in the number of Warrant Shares
        purchasable hereunder shall be required unless such adjustment would
        require an increase or decrease of at least one percent (1%) in the
        number of Warrant Shares purchasable upon  the exercise of each
        Warrant; PROVIDED, HOWEVER, that any adjustments which by reason of
        this paragraph (g) are not required to be made shall be carried forward
        and taken into account in any subsequent adjustment.  All calculations
        shall be made to the nearest one-thousandth of a share.

                                      9
<PAGE>   219
                (h)       Whenever the number of Warrant Shares purchasable
        upon the exercise of each Warrant is adjusted, as herein provided, the
        Warrant Price payable upon the exercise of each Warrant shall be
        adjusted by multiplying such Warrant Price immediately prior to such
        adjustment by a fraction, of which the numerator shall be the number of
        Warrant Shares purchasable upon the exercise of such Warrant
        immediately prior to such adjustment, and of which the denominator
        shall be the number of Warrant Shares purchasable immediately
        thereafter.

                (i)       No adjustment in the number of Warrant Shares
        purchasable upon the exercise of each Warrant need be made under
        paragraphs (b), (c) and (d) if the Company issues or distributes to
        each Holder of Warrants the rights, options, warrants, or convertible 
        or  exchangeable securities,  or  evidences  of indebtedness or assets
        referred to in those paragraphs which each Holder of Warrants would
        have been entitled to receive had the Warrants been exercised prior to
        the happening of such event or the record date with respect thereto
        regardless of whether the Warrants are exercisable at the time of the
        happening of such event or at the time of any record date with respect
        thereto.  No adjustment need be made for a change in the par value of
        the Warrant Shares.

                (j)       For the purpose of this Section 8.1, the term "shares
        of Common Stock" shall mean (i) the class of stock designated as the
        Common Stock of the Company at the date of this Agreement, or (ii) any
        other class of stock resulting from successive changes or
        reclassifications of such shares consisting solely of changes in par
        value, or from par value to no par value, or from no par value to par
        value.  In the event that at any time, as a result of  an adjustment
        made pursuant to paragraph (a) above,  the Holders shall become
        entitled to purchase any securities of the Company other than shares of
        Common Stock, thereafter the number of such other securities so
        purchasable upon exercise of each Warrant and the Warrant Price of such
        securities shall be subject to  adjustment from time to time in a
        manner and on terms as nearly equivalent as practicable to the
        provisions with respect to the Warrant Shares contained in paragraphs
        (a) through (i), inclusive, above, and the provisions of Section 4 and
        Sections 8.2 through 8.5, inclusive, with respect to the Warrant
        Shares, shall apply on like terms to any such other securities.

                (k)       Upon the expiration of any rights, options, warrants
        or conversion or exchange privileges, if any thereof shall not have
        been exercised, the Warrant Price and the number of shares of Common
        Stock purchasable upon the exercise 

                                      10
<PAGE>   220
     
        of each Warrant shall, upon such expiration, be readjusted and shall
        thereafter be such as it would have been had it been originally
        adjusted (or had the original adjustment not been required, as the case
        may be) as if (A) the only shares of Common Stock so issued were the
        shares of Common Stock, if any, actually issued or sold upon the
        exercise of  such rights, options, warrants or conversion or exchange
        rights and (B) such shares of Common Stock, if any, were issued or sold
        for the consideration actually received by the Company upon such
        exercise plus the aggregate consideration, if any, actually received by
        the Company for the issuance, sale or grant of all such rights,
        options, warrants or conversion or exchange rights whether or not
        exercised; PROVIDED, HOWEVER, that no such readjustment shall have the
        effect of increasing the Warrant Price or decreasing the number of
        Warrant Shares by an amount in excess  of the amount of the adjustment
        initially made  with respect to the issuance, sale or grant of such
        rights, options, warrants or conversion or exchange rights.


        8.2.  VOLUNTARY ADJUSTMENT BY THE COMPANY.  The Company may, at its 
option, at any time during the term of the  Warrants, reduce the then current
Warrant Price to any amount determined appropriate by the Board of Directors of
the Company.


        8.3.  NOTICE OF ADJUSTMENT.  Whenever the number of Warrant Shares 
purchasable  upon the exercise of each  Warrant or the Warrant Price of such
Warrant Shares is  adjusted, as  herein provided, the Company shall promptly
mail by first class, postage prepaid,  to each Holder notice of such adjustment
or adjustments and a certificate of a firm of independent public accountants
selected by the Board of Directors of the Company (who may be the regular
accountants employed by the Company) setting  forth the number of Warrant
Shares purchasable upon the exercise of each Warrant and the Warrant Price of
such Warrant Shares after such adjustment and setting forth a brief statement
of the facts requiring such adjustment and setting forth the computation by
which such adjustment was made.  Such certificate,  absent manifest error,
shall be conclusive evidence of the  correctness of such adjustment.


        8.4.  NO ADJUSTMENT FOR DIVIDENDS.  Except as provided in Section  8.1,
no adjustment in respect of any dividends shall be made during the term of
a Warrant or upon the exercise of a Warrant.


        8.5.  PRESERVATION OF PURCHASE RIGHTS UPON MERGER, CONSOLIDATION, ETC. 
In case of any consolidation of the Company

                                      11
<PAGE>   221

with or merger of the Company into another corporation or in case of any sale,
transfer or lease to another corporation of all or substantially  all the
property of the Company, the Company or such successor or purchasing
corporation, as the case may be, shall execute with each Holder an      
agreement that each Holder shall have the right thereafter upon payment of the
Warrant Price in effect immediately prior to such action to purchase  upon
exercise of each Warrant the kind and amount of shares and  other securities
and property which he would have owned or have been entitled to  receive after
the happening of such  consolidation, merger,  sale, transfer or lease had such
Warrant been  exercised immediately  prior  to  such  action regardless of
whether the Warrants are exercisable at the time of such action;  PROVIDED,
HOWEVER,  that no adjustment in respect of cash  dividends, interest or other
income on or from such shares or other securities and  property shall be made 
during the  term of a Warrant or upon the exercise of a Warrant.  Such
agreement  shall provide  for adjustments, which shall be as nearly equivalent
as may be practicable to the adjustments provided for in this Section  8.   The
provisions of this Section 8.5 shall  similarly apply to successive
consolidations, mergers, sales, transfers or leases.


        8.6.  STATEMENT ON WARRANTS.  Irrespective of any adjustments in  the
Warrant Price or the number or kind of shares purchasable upon the exercise 
of the Warrants,  Warrants theretofore or thereafter issued may continue
to express the same price and number and kind of shares as are stated in the
Warrants initially issuable pursuant to this Agreement.


        9.    FRACTIONAL INTERESTS.  The Company shall  not  be required 
to  issue fractional Warrant Shares on the exercise  of Warrants.   If  more 
than  one Warrant shall  be  presented  for exercise in full at the same time
by the same Holder, the  number of  full Warrant Shares which shall be issuable
upon the exercise thereof shall be computed on the basis of the aggregate
number of Warrant  Shares  purchasable  on  exercise  of  the  Warrants  so
presented.  If any fraction of a Warrant Share would, except  for the
provisions of this Section 9, be issuable on the exercise  of any Warrant (or
specified portion thereof), the Company shall pay an amount in cash equal to
the closing price for one share of the Common  Stock, as determined in
accordance with paragraph (e)  of Section  8.1, on the trading day immediately
preceding  the  date the  Warrant  is  presented  for  exercise,  multiplied 
by  such fraction.


        10.   REGISTRATION UNDER THE SECURITIES ACT OF 1933.  Holder represents 
and warrants to the Company that Holder will not dispose of any such Warrants 
or Warrant Shares except pursuant to (i) an  

                                      12
<PAGE>   222

effective registration statement, or (ii) an  applicable exemption from 
registration under the Securities Act of 1933 (the "Act").  In connection with  
any sale by Holder pursuant to clause (ii) of the preceding sentence, Holder
shall  furnish to the Company an opinion of counsel reasonably satisfactory to
the Company to the effect that such exemption from registration is available in
connection with such sale.
   

        The Company hereby agrees to file a registration statement with the
Securities anc Exchange Commission within 90 days of the issuance of the
Warrants to permit the holders of the Warrants to exercise the Warrants
pursuant to the terms hereof.  The Company agrees to ake all reasonable stpes
to ensure that such registration statement will be promptly ordered effective
by the Securities and Exchange Commission.  Further, the Company agrees to make
such filings pursuant to state securities laws to permit a holder to exerecise
the Warrants within the time frame set forth in this paragraph.
    

        11.       NO RIGHTS AS STOCKHOLDERS; NOTICE TO HOLDERS.  Nothing
contained in this Agreement or in any of the Warrants shall be construed as
conferring upon the Holders or their transferees the right to vote or to
receive dividends or to consent or to receive notice  as stockholders in
respect of any meeting of stockholders for the election of directors of the
Company or any other matter, or  any  rights whatsoever as stockholders of the 
Company.  If, however, at any time prior to the expiration of the Warrants 
and prior to their exercise, any of the following events shall occur:

                (a)       the Company shall declare any dividend payable in any
        securities upon its shares of Common Stock or make any distribution
        (other than a cash dividend) to the holders of its shares of Common
        Stock; or

                (b)       the Company shall offer to the holders of its shares
        of Common Stock any additional shares of Common Stock or securities
        convertible into or exchangeable for shares of Common Stock or any
        right to subscribe to or purchase any thereof; or

                (c)       a dissolution, liquidation or winding up of the
        Company (other than in connection with a consolidation, merger, sale,
        transfer or lease of all or substantially all of its property, assets,
        and business as an entirety) shall be proposed,

then in any one or more of said events the Company shall (a) give notice 
in writing of such event to the Holders as provided in Section 12 hereof and
(b) if there are more than 100 Holders, cause  notice of such event to be
published once in The Wall Street  
                                      13
<PAGE>   223

Journal (national edition), such giving of notice and publication to be
completed at least 15 days prior to the date fixed as a record date or the date
of closing the transfer books for the determination of the stockholders
entitled to such dividend,  distribution, or subscription  rights, or for the
determination of stockholders entitled to vote on such  proposed dissolution, 
liquidation or winding up.   Such notice shall specify such record date or the
date of closing the transfer books,  as the case may be.  Failure to publish,
mail or  receive such notice or any defect therein or in the publication        
or mailing thereof shall not affect the validity of any action taken in 
connection  with such dividend, distribution or  subscription rights, or such
proposed dissolution, liquidation or winding up.


        12.       NOTICES.  Any notice pursuant to this Agreement to be given 
or made by the Holder of any Warrant or Warrant Shares  to or  on the Company
shall be sufficiently given or made if sent by first-class mail, postage
prepaid, addressed as follows:

     Benton Oil and Gas Company
     1145 Eugenia Place
     Suite 200
     Carpinteria, California 93013
     Attention:  Gregory S. Grabar

Notices or demands authorized by this Agreement to be given or made to or on
the Holder of any Warrant or Warrant Shares shall be sufficiently given or made
(except as otherwise  provided  in this Agreement) if sent  by registered
mail,  return receipt requested, postage  prepaid, addressed to  such Holder at
the address of such Holder as shown on the Warrant Register  or the Common
Stock Register, as the case may be.


        13.       GOVERNING LAW.  This Agreement shall be governed by and
construed in accordance with the laws of the State of California, without
giving effect to principles of conflict of laws.


        14.        SUPPLEMENTS AND AMENDMENTS.   The Company and the Holders 
may from time to time supplement or amend this Agreement in  order  to cure any
ambiguity or to correct or supplement  any provision contained herein which may
be defective or inconsistent with  any other provision herein, or to make any
other provisions in  regard  to matters or questions arising hereunder  which 
the Company and the Holder may deem necessary or desirable and  which shall not
be inconsistent with the provisions of the Warrants and which  shall  not
adversely affect the interests of the  Holders. Any  amendment to this
Agreement may be effected with the consent of  Holders of at 

                                      14

<PAGE>   224

least 66 2/3% of the Warrants (for this purpose Warrant Shares shall be deemed  
to be Warrants in the proportion that  Warrant  Shares are then issuable  upon
the exercise of Warrants);  provided  that, any amendment which  shall  have
the effect of materially adversely affecting the interests of any Holder shall
not be effective with respect to such Holder if such Holder shall not have
consented thereto.


        15.       SUCCESSORS.    All the covenants and provisions of this
Agreement by or for the benefit of the Company or the Holders shall bind 
and inure to the benefit of their respective successors and assigns hereunder.


        16.       MERGER OR CONSOLIDATION OF THE COMPANY. So long as this
Agreement remains in effect, the Company will not merge or consolidate  with or
into, or sell, transfer or lease all or substantially all of  its property to, 
any other corporation unless the successor or purchasing corporation, as the
case may be  (if not the Company), shall expressly assume, by supplemental
agreement executed and delivered to the Holders,  the due  and punctual
performance and observance of each and every covenant and  condition of this
Agreement to be performed and observed by the Company.


        17.       BENEFITS OF THIS AGREEMENT.   Nothing in this Agreement shall 
be construed to give to any person or corporation other than the Company
and the Holders, any legal or equitable  right, remedy or claim under this
Agreement, but this Agreement shall be for the sole and exclusive benefit of
the Company and the Holders of the Warrants and Warrant Shares.


        18.       CAPTIONS. The captions of the sections and subsections of 
this Agreement have been inserted for convenience and  shall have no 
substantive effect.


        19.       COUNTERPARTS.  This Agreement may be executed in any number
of counterparts, each of which so executed shall be deemed to   be   an 
original;  but  such  counterparts  together  shall constitute but one and the
same instrument.

                                      15

<PAGE>   225
        IN  WITNESS  WHEREOF, the parties hereto have  caused  this Agreement 
to be duly executed on the day, month and  year  first above written.

                              BENTON OIL AND GAS COMPANY


                              By:
                                  -------------------------
                                  Gregory S. Grabar
                                  Vice President-Corporate Development
(CORPORATE SEAL)

Attest:

- -------------------------
Toni L. Jackson



                                      16

<PAGE>   226
                                                                  
                                                                    EXHIBIT B

                            Huddleston & Co., Inc.
                      Petroleum and Geological Engineers
                            1111 Fannin-Suite 1700
                            Houston, Texas  77002
                                 ____________

                                (713) 658-0248


                                March 8, 1995
                                      
                                      

Mr. A.E. Benton
Benton Oil and Gas Company
1145 Eugenia Place Drive, Suite 200
Carpinteria, California  93013
                                        Re:  Benton Oil & Gas Combination 
                                             Partnership 1989-1 L.P. Audit of
                                             Estimated Reserves and Revenues As 
                                             of January 1, 1995

Dear Mr. Benton:

Pursuant to your request, we have audited estimates of future reserves and
associated revenues for certain properties owned by the Benton Oil & Gas
Combination Partnership 1989-1 L.P. (the Partnership).  These projections were
originally prepared by the Benton Oil and Gas Company (Benton) engineering
staff and have been audited by Huddleston & Co., Inc. (Huddleston).  Properties
reviewed in detail by our firm for the purposes of this audit include Umbrella
Point Field located in Chambers County, Texas.  These properties represent 100%
of the total Proved revenues discounted at 10% attributable to the Partnership.

A summary of the estimated reserves and revenues attributable to the subject
properties, as of January 1, 1995, is as follows:

<TABLE>
<CAPTION>
                                     Net to Benton Oil and Gas Combination Partnership 1989-1
                                     --------------------------------------------------------
                                                        Proved Developed
                                                        ----------------

Constant Product Prices              Producing      Shut-in  Behind Pipe    Total
- -----------------------              ---------      -------  -----------    -----
<S>                                  <C>            <C>        <C>         <C>
Estimated Net Oil, bbl                 19,662          353       4,115      24,130
Estimated Net Gas, MMcf                 164.4         18.7          .1       183.2
Estimated Future Net Revenue (FNR), $ 354,558       18,385      37,212     410,155
Present Worth FNR, Disc. @ 10%, $     289,842       14,128      21,570     325,540
</TABLE>


REPORTING REQUIREMENTS
- ----------------------

Securities and Exchange Commission (SEC) Regulation S-K, Item 102 and
Regulation S-X, Rule 4-10 and Financial Accounting Standards Board (FASB)
Statement No. 69 require oil and gas reserve information to be reported by
publicly held entities as supplemental financial data.  These regulations and
standards provide for estimates of Proved reserves and associated revenues
discounted at 10% based on product prices being received on the effective date
of the report.
<PAGE>   227
Mr. A.E. Benton
Benton Oil and Gas Company
March 8, 1995
Page Two


The Society of Petroleum Engineers (SPE) requires Proved reserves to be
economically recoverable with costs and prices in effect on the "as of" date of
the report.  In addition, the SPE has issued Standards Pertaining to the
Estimating and Auditing of Oil and Gas Reserve Information which sets standards
for the qualification and independence of reserve estimators and auditors and
accepted methods for estimating and scheduling future reserves.   

In our opinion, both the audit performed by Huddleston and the estimates
prepared by Benton have been performed in accordance with all applicable SEC,
FASB, and SPE regulations and requirements.  It should be noted that the
reserve estimates shown herein are consistent with estimates prepared by Benton
as of January 1, 1995.
        
REPORT PREPARATION
- ------------------

The estimated reserves and revenues provided for this review were initially
prepared by Benton and have been reviewed in detail by our firm for the
purposes of this audit.  Where there were significant differences in the
estimated reserves and revenues, Huddleston has suggested revisions in the
Benton estimates and Benton has revised its projections accordingly.  In our
opinion, estimates for the properties, individually and in aggregate, are not
materially different from those which would have been rendered by Huddleston
had we independently projected the reserve volumes.

In performing our audit we have utilized certain geological and petrophysical
studies which were prepared by Benton and representatives of the current and
previous operators.  We have reviewed these studies and have found them to be
reasonable with respect to the subject reservoirs; however, we have not
attempted to independently prepare geological interpretations or estimates of
reservoir parameters.  In some cases we have utilized information from our
files relating to previous studies of certain properties shown herein.

The projections which were reviewed for the purposes of this audit represent
100% of the total future revenues as projected by Benton.  Huddleston has not
attempted to review projections for the remaining properties in detail;
however, these properties have not been assigned any future reserves.  We do
not believe that a review of these properties would result in a material
revision of the total estimated reserves and revenues. 

The projections shown herein were based on performance data from public sources
available in June 1994; however, data of this type is subject to delays as a
result of regulatory reporting requirements and the timing of the commercial
sources providing such data.

The cash flow projections were prepared utilizing a commercially available
software package marketed by David P. Cook & Associates.  We have generally
reviewed the output of the calculation procedures utilized by the program and
believe them to be mathematically correct for the purposes of
this audit.

PRODUCT PRICES
- --------------

It is our understanding that SEC regulations require future revenues to be
projected on the basis of product prices in effect on the "as of" date of the
report without further escalations or reductions.  However, certain variations
in product prices, attributable to contractual provisions, may be utilized in
the preparation of the cash flows where the prices are specified by the
contract.
<PAGE>   228
Mr. A.E. Benton
Benton Oil and Gas Company
March 8, 1995
Page Three


The projections shown herein have been based on actual prices being received on
December 31, 1994.  These prices were held constant over the life of the
properties.

Market prices for both oil and gas continue to be subject to a significant
degree of variation in both domestic and international markets and reductions
in the market prices for oil volumes have materially affected the value of our
previous reserve estimates.

A comparison of the average product prices, weighted as a composite for all
properties, is as follows:

<TABLE>
<CAPTION>
          Constant Product Prices    Oil, $/bbl    Gas, $/Mcf
          -----------------------    ----------    ----------
          <S>                           <C>         <C>

          1995                          15.94       1.60
          Maximum                       15.94       1.60
          Average Over Life             15.94       1.60
</TABLE>


PROJECTIONS
- -----------

The estimated reserves and revenues have been projected on a calendar year
basis with the first time period being January 1, 1995, through December 31,
1995.


RESERVES ESTIMATES
- ------------------

Reserve estimates for the properties reviewed for the purpose of this audit
have been prepared with consideration of the available data and the nature of
the producing horizons.  The projections have been based on performance data
for the existing completions, analogy to other completions in the subject
reservoirs, and volumetric calculations.  Estimates prepared on the basis of
analogy and volumetric calculations will be subject to much greater variation
than those prepared for depletion drive reservoirs having established
production trends.

UMBRELLA POINT FIELD - This property operated by French Production,
Incorporated, is located in state waters offshore Chambers County, Texas, and
produces from multiple reservoirs.  Projections for this property were based
primarily on the extrapolation of production data with consideration for water
cut and pressure information, where available.  We have also utilized
information from our files from previous studies prepared by our firm relating
to this property.  In general, the productive reservoirs for this property are
in the latter stages of depletion and future recoveries may be influenced by
both mechanical and reservoir factors.

OTHER PROPERTIES - We have not attempted to independently prepare estimates of
future reserves for the remaining properties located in East Cameron Block 229
Field; however, we have reviewed the projections with consideration for
historical production levels.  The Benton estimates are consistent with recent
performance and Benton has projected that the properties do not have any future
economically recoverable reserves.

GENERAL CONCLUSIONS - On an overall basis, we have not encountered materials
differences in our reserve estimates and those prepared by Benton.  However,
the projected reserves shown herein have been extracted from the total Benton
report and represent minor values relative to all properties owned by Benton.
The properties shown have therefore been studied to a much lesser extent than
if reserves had been prepared separately.  In cases where we have encountered
significant differences in estimated recoveries, Benton has consented to the
revision of its reserve estimates to be consistent with projections by
Huddleston.
<PAGE>   229
Mr. A.E. Benton
Benton Oil and Gas Company
March 8, 1995
Page Four


The reserve estimates for the properties owned by the Partnership will be
subject to a significant degree of variation due to the nature of the producing
reservoirs and the stage of depletion of the properties.


OPERATING AND CAPITAL COSTS
- ---------------------------

Huddleston has reviewed operating costs utilized by Benton and believes they
are appropriate for the subject properties.  Severance and ad valorem taxes
were deducted from gross revenues in accordance with statutory rates.  All
taxes (excluding income taxes) were estimated by Benton and have been deducted
from future revenues. 

All capital costs were based on information provided by Benton.  Huddleston has
generally reviewed these costs and believes they are reasonable with respect to
the proposed operations and properties.

All capital and operating expenditures were held constant over the life of the
properties.


FACTORS NOT INCLUDED
- --------------------

Values were not assigned to nonproducing acreage or to the salvage of surface
and subsurface equipment.

General office overhead, income taxes, and allowances for depletion,
depreciation, and amortization have not been deducted from future revenues.


REPORT QUALIFICATIONS
- ---------------------

THE ESTIMATED REVENUES AND PRESENT VALUE OF THESE REVENUES ARE NOT REPRESENTED
AS MARKET VALUE.

Estimates for individual completions should be considered in context with the
overall or total estimated revenues.  Actual individual lease performances will
vary considerably from the projections particularly in comparison to the total
estimated production from all properties. 

We did not inspect the properties or conduct independent well tests.
Ownership, product prices, and other factual data have been accepted as
represented by Benton.  We have generally tested these data and believe the
information is correct.

                                  Respectfully submitted,



                                  Peter D. Huddleston, P.E.

PDH:JPK:dbw
<PAGE>   230
                                      
                            Huddleston & Co., Inc.
                      Petroleum and Geological Engineers
                            1111 Fannin-Suite 1700
                            Houston, Texas  77002
                                 ____________
                                (713) 658-0248
                                      
                                      
                                March 8, 1995


Mr. A.E. Benton
Benton Oil and Gas Company
1145 Eugenia Place, Suite 200
Carpinteria, California 93013
                                        Re:  Benton Oil & Gas Combination 
                                             Partnership 1990-1 L.P. Audit of
                                             Estimated Reserves and Revenues As 
                                             of January 1, 1995

Dear Mr. Benton:

Pursuant to your request, we have audited estimates of future reserves and
associated revenues for certain properties owned by the Benton Oil & Gas
Combination Partnership 1990-1 L.P.  These projections were originally prepared
by the Benton Oil & Gas Company (Benton) engineering staff and have been
audited by Huddleston & Co., Inc. (Huddleston).  The reviewed properties are
located in West Cote Blanche Bay Field, St. Mary Parish, Louisiana, and
Umbrella Point Field, Chambers County, Texas.  Estimates of future reserves and
revenues for 100% of the discounted future revenues were audited by our firm.

A summary of the estimated reserves and revenues attributable to the subject
properties is as follows:

<TABLE>
<CAPTION>
                                           Net to Benton Oil and Gas Combination Partnership 1990-1
                                           --------------------------------------------------------
                                                        Proved    
                          
                                           --------------------------------------------------
Constant Product Prices                    Producing          Nonproducing        Undeveloped       Total
- -----------------------                    ---------          ------------        -----------       -----
<S>                                        <C>                   <C>              <C>             <C>
West Cote Blanche Bay Field 
- ---------------------------
Estimated Net Oil, bbl                           4                  190              1,128            1,322
Estimated Net Gas, MMcf                        2.9                 19.1              110.5            132.5
Estimated Future Net Revenue (FNR),$         4,900               30,384            157,868          193,152
Present Worth FNR, Disc. at 10%, $           4,794               23,787             91,113          119,694

Umbrella Point Field
- --------------------
Estimated Net Oil, bbl                      56,617               12,871                  0           69,488
Estimated Net Gas, MMcf                      473.2                 54.2                0.0            527.4
Estimated Future Net Revenue (FNR), $    1,020,956              160,192                  0        1,181,148
Present Worth FNR, Disc. at 10%, $         834,576              102,853                  0          937,429

Total
- -----
Estimated Net Oil, bbl                      56,621               13,061              1,128           70,810
Estimated Net Gas, MMcf                      476.2                 73.3              110.5            659.9
Estimated Future Net Revenue (FNR), $    1,025,856              190,575            157,868        1,374,299
Present Worth FNR, Disc. at 10%, $         839,370              126,640             91,113        1,057,123

<FN>
Note:  The nonproducing category includes behind pipe and shut-in categories.
</TABLE>
<PAGE>   231
Mr. A.E. Benton
Benton Oil and Gas Company
March 8, 1995
Page Two


REPORTING REQUIREMENTS
- ----------------------

Securities and Exchange Commission (SEC) Regulation S-K, Item 102 and
Regulation S-X, Rule 4-10 and Financial Accounting Standards Board (FASB)
Statement No. 69 require oil and gas reserve information to be reported by
publicly held entities as supplemental financial data. These regulations and
standards provide for estimates of Proved reserves and associated revenues
discounted at 10% based on product prices being received on the effective date
of the report.

The Society of Petroleum Engineers (SPE) requires Proved reserves to be
economically recoverable with costs and prices in effect on the "as of" date of
the report.  In addition, the SPE has issued Standards Pertaining to the
Estimating and Auditing of Oil and Gas Reserve Information which sets standards
for the qualifications and independence of reserve estimators and auditors and
accepted methods for estimating and scheduling future reserves.

In our opinion, both the audit performed by Huddleston, and the estimates
prepared by Benton have been performed in accordance with all applicable SEC,
FASB, and SPE regulations and requirements.  It should be noted that the
reserve estimates shown herein are consistent with estimates prepared by Benton
as of January 1, 1995.

REPORT PREPARATION
- ------------------

The estimated reserves and revenues provided for this review were initially
prepared by Benton and have been reviewed in detail by our firm for the
purposes of this audit.  Where there were significant differences in the
estimated reserves and revenues, Huddleston has suggested revisions in the
Benton estimates and Benton has revised its projections accordingly.  In our
opinion, estimates for the properties, individually and in aggregate, are not
materially different from those which would have been rendered by Huddleston
had we independently projected the reserve volumes.

In performing our audit we have utilized certain geological and petrophysical
studies which were prepared by Benton and representatives of the current and
previous operators.  We have reviewed these studies and have found them to be
reasonable with respect to the subject reservoirs; however, we have not
attempted to independently prepare geological interpretations or estimates of
reservoir parameters.  In some cases we have utilized information from our
files relating to previous studies of certain properties shown herein.

The projections which were reviewed for the purposes of this audit represent
100% of the total future revenues as projected by Benton.

The projections shown herein were based on performance data derived from public
sources available in January 1995; however, data of this type is subject to
delays as a result of regulatory reporting requirements and the timing of the
commercial sources providing such data.

The cash flow projections were prepared utilizing a commercially available
software package marketed by David P. Cook & Associates.  We have generally
reviewed the output of the calculation procedures utilized by the program and
believe them to be mathematically correct for the purposes of this audit.
<PAGE>   232
Mr. A.E. Benton
Benton Oil and Gas Company
March 8, 1995
Page Three


PRODUCT PRICES
- --------------

It is our understanding that SEC regulations require future revenues to be
projected on the basis of product prices in effect on the "as of" date of the
report without further escalations or reductions.  However, certain variations
in product prices, attributable to contractual provisions, may be utilized in
the preparation of the cash flows where the prices are specified by the
contract.

The projections shown herein were based on actual product prices being received
on December 31, 1994.  These prices were held constant over the life of the
properties. 

Market prices for both oil and gas continue to be subject to a significant
degree of variation in both domestic and international markets.  Future
variations in the projected prices may materially affect our projections of
economically recoverable reserves and associated revenues.

A comparison of the average product prices, weighted as a composite for all
properties, is a follows:

<TABLE>
<CAPTION>
         Constant Product Prices           Oil, $/bbl               Gas, $/Mcf
         -----------------------           ----------               ----------
         <S>                                 <C>                      <C>

         1995                                15.94                    1.60
         Maximum                             15.94                    1.60
         Average Over Life                   15.94                    1.60
</TABLE>

PROJECTIONS
- -----------

The estimated reserves and revenues have been projected on a calendar year
basis with the first time period being January 1, 1995, through December 31,
1995.

PROPERTY SALE
- -------------

The projections shown herein reflect the divestiture of interests owned by the
partnership in the Shallow Oil Reservoirs in West Cote Blanche Bay Field which
was effective January 1, 1995.  The partnership retained interests in the Gas
Cap Reservoirs in this property.

RESERVE ESTIMATES
- -----------------

Reserve estimates for the properties reviewed for the purpose of this audit
have been prepared with consideration of the available data and the nature of
the producing horizons.  The projections have been based on performance data
for the existing completions, analogy to other completions in the subject
reservoirs, and volumetric calculations.  Estimates prepared on the basis of
analogy and volumetric calculations will be subject to much greater variation
than those prepared for depletion drive reservoirs having established
production trends.

UMBRELLA POINT FIELD - This property operated by French Production,
Incorporated, is located in state waters offshore Chambers County, Texas, and
produces from multiple reservoirs.  Projections for this property were based
primarily on the extrapolation of production data with consideration for water
cut and pressure information where available.  We have also utilized
information from our files from previous studies prepared by our firm relating
to this property.  In general, the productive reservoirs for this property are
in the latter stages of depletion and future recoveries may be influenced by
both mechanical and reservoir factors.
<PAGE>   233
Mr. A.E. Benton
Benton Oil and Gas Company
March 8, 1995
Page Four


WEST COTE BLANCHE BAY FIELD - Estimated reserves for the gas cap reservoirs
have been assigned on the basis of volumetric calculations for eight horizons
ranging in depth from 9,000 to 12,000 feet in three fault blocks.  The
volumetric calculations have been based on log-derived parameters and
geological interpretations prepared on the basis of subsurface information,
pressure information, and geophysical interpretations based on 3-D seismic
data.  Subsequent to our previous review, revised geological interpretations
have resulted in the transfer of reserves for the 12,600' reservoir to location
1-A (#868) from well #720 with no change in the estimated recoverable reserves.
Additional recoverable reserves have been assigned to the 38 and 38A reservoirs
based on geologic interpretations with consideration for historical performance
data.

The projected reserves for the #831 gas well, 13,900' reservoir, have been
revised relative to our July 1, 1994, evaluation on the basis of performance
data to reflect an ultimate recovery of 6,400 MMcf.  The remaining reserves for
this reservoir have been transferred to location 1- A (#868).

OTHER PROPERTIES - We have not attempted to independently prepare estimates of
future reserves for the remaining properties located in East Cameron Block 229
Field.  However, we have reviewed the projections with consideration for
historical production levels.  The Benton estimates are consistent with recent
rates of production and Benton has projected that the properties do not have
any additional economically recoverable reserves.

GENERAL CONCLUSIONS - On an overall basis, we have not encountered material
differences in our reserve estimates and those prepared by Benton.  In cases
where we have encountered significant differences in estimated recoveries,
Benton has consented to the revision of its reserve estimates to be consistent
with projections by Huddleston.  The projected reserves shown herein will be
subject to a significant level of variation due to the nature of the subject
reservoirs, the stage of depletion of the producing horizons, the reserve
estimation techniques, and the actual schedule of future remedial and
development operations.

Huddleston has relied on Benton to provide development schedules.  The
scheduling of future operations will be influenced by a variety of factors
including economic and market conditions, political considerations,
availability of funds, alternative investment opportunities, leasehold
obligations, and internal decision making.  Variations in the execution of
these development plans may have a material impact on the economic value of
both the discounted and undiscounted revenue streams.


OPERATING AND CAPITAL COSTS
- ---------------------------

Huddleston has reviewed operating costs utilized by Benton and believes they
are appropriate for the subject properties.  Costs for all properties were
consistent with historical levels.  Severance and ad valorem taxes were
deducted from gross revenues in accordance with statutory rates.  All taxes
(excluding income taxes) were estimated by Benton and have been deducted from
future revenues. 

All capital costs were based on information provided by Benton.  Huddleston has
generally reviewed these costs and believes they are reasonable.  The capital
costs shown for the remedial operations for West Cote Blanche Bay Field have
been adjusted to reflect the statistical success rates of remedial operations
and variations in the depth of the historical and proposed
operations.

All capital and operating expenditures were held constant over the life of the 
properties.
<PAGE>   234
Mr. A.E. Benton
Benton Oil and Gas Company
March 8, 1995
Page Five


FACTORS NOT INCLUDED
- --------------------

Values were not assigned to nonproducing acreage or to the salvage of surface
and subsurface equipment.

General office overhead, income taxes, and allowances for depletion,
depreciation, and amortization have not been deducted from future revenues.


REPORT QUALIFICATIONS
- ---------------------

THE ESTIMATED REVENUES AND PRESENT VALUE OF THESE REVENUES ARE NOT REPRESENTED
AS MARKET VALUE.

Estimates for individual completions should be considered in context with the
overall or total estimated revenues.  Actual individual lease performances will
vary considerably from the projections particularly in comparison to the total
estimated production from all properties.

We did not inspect the properties or conduct independent well tests.
Ownership, product prices, and other factual data have been accepted as
represented by Benton.  We have generally tested these data and believe the
information is correct.

                                                   Respectfully submitted,



                                                   Peter D. Huddleston, P.E.

PDH:JPK:dbw
<PAGE>   235
                            Huddleston & Co., Inc.
                      Petroleum and Geological Engineers
                            1111 Fannin-Suite 1700
                            Houston, Texas  77002
                            ---------------------
                                (713) 658-0248
                                      
                                March 8, 1995


Mr. A.E. Benton
Benton Oil and Gas Company
1145 Eugenia Place Drive, Suite 200
Carpinteria, California  93013
                                        Re:  Benton Oil & Gas Combination 
                                             Partnership 1991-1 L.P. Audit of
                                             Estimated Reserves and Revenues 
                                             As of January 1, 1995

Dear Mr. Benton:

Pursuant to your request, we have audited estimates of future reserves and
associated revenues for certain properties owned by the Benton Oil & Gas
Combination Partnership 1991-1 L.P.  These projections were originally prepared
by the Benton Oil & Gas Company (Benton) engineering staff and have been
audited by Huddleston & Co., Inc. (Huddleston).  The reviewed properties are
located in West Cote Blanche Bay Field, St. Mary Parish, Louisiana, and
Umbrella Point Field, Chambers County, Texas.  Estimates of future reserves and
revenues for 100% of the discounted future revenues were audited by our firm.

A summary of the estimated reserves and revenues attributable to the subject
properties is as follows:

<TABLE>
<CAPTION>
                                    Net to Benton Oil and Gas Combination Partnership 1991-1
                                    --------------------------------------------------------
                                                             Proved
                                                             ------

Constant Product Prices              Producing        Nonproducing    Undeveloped      Total 
- -----------------------              ---------        ------------    -----------      ------
<S>                                  <C>               <C>              <C>           <C>
West Cote Blanche Bay Field
- ---------------------------
Estimated Net Oil, bbl                      1                38            225            264
Estimated Net Gas, MMcf                    .6               3.8           22.0           26.4
Estimated Future Net Revenue (FNR),$      979             6,056         31,456         38,491
Present Worth FNR, Disc. @ 10%, $         958             4,743         18,155         23,856

Umbrella Point Field
- --------------------
Estimated Net Oil, bbl                 11,269             2,563              0         13,832
Estimated Net Gas, MMcf                  94.2              10.8            0.0          105.0
Estimated Future Net Revenue (FNR), $ 203,203            31,907              0        235,110
Present Worth FNR, Disc. at 10%, $    166,097            20,492              0        186,589

Total
- -----
Estimated Net Oil, bbl                 11,270             2,601            225         14,096
Estimated Net Gas, MMcf                  94.8              14.6           22.0          131.3
Estimated Future Net Revenue (FNR), $ 204,182            37,963         31,456        273,601
Present Worth FNR, Disc. at 10%, $    167,055            25,235         18,155        210,445

<FN>
Note:  The nonproducing category includes behind pipe and shut-in categories.
</TABLE>
<PAGE>   236
Mr. A.E. Benton
Benton Oil and Gas Company
March 8, 1995
Page Two


REPORTING REQUIREMENTS
- ----------------------

Securities and Exchange Commission (SEC) Regulation S-K, Item 102 and
Regulation S-X, Rule 4-10 and Financial Accounting Standards Board (FASB)
Statement No. 69 require oil and gas reserve information to be reported by
publicly held entities as supplemental financial data.  These regulations and
standards provide for estimates of Proved reserves and associated revenues
discounted at 10% based on product prices being received on the effective date
of the report.

The Society of Petroleum Engineers (SPE) requires Proved reserves to be
economically recoverable with costs and prices in effect on the "as of" date of
the report.  In addition, the SPE has issued Standards Pertaining to the
Estimating and Auditing of Oil and Gas Reserve Information which sets standards
for the qualification and independence of reserve estimators and auditors and
accepted methods for estimating and scheduling future reserves.   

In our opinion, both the audit performed by Huddleston, and the estimates
prepared by Benton have been performed in accordance with all applicable SEC,
FASB, and SPE regulations and requirements.  It should be noted that the
reserve estimates shown herein are consistent with estimates prepared by Benton
as of January 1, 1995.
        
REPORT PREPARATION
- ------------------

The estimated reserves and revenues provided for this review were initially
prepared by Benton and have been reviewed in detail by our firm for the
purposes of this audit.  Where there were significant differences in the
estimated reserves and revenues, Huddleston has suggested revisions in the
Benton estimates and Benton has revised its projections accordingly.  In our
opinion, estimates for the properties, individually and in aggregate, are not
materially different from those which would have been rendered by Huddleston
had we independently projected the reserve volumes.

In performing our audit we have utilized certain geological and petrophysical
studies which were prepared by Benton and representatives of the current and
previous operators.  We have reviewed these studies and have found them to be
reasonable with respect to the subject reservoirs; however, we have not
attempted to independently prepare geological interpretations or estimates of
reservoir parameters.  In some cases we have utilized information from our
files relating to previous studies of certain properties shown herein.

The projections which were reviewed for the purposes of this audit represent
100% of the total future revenues as projected by Benton.

The projections shown herein were based on performance data derived from public
sources available in January 1995; however, data of this type is subject to
delays as a result of regulatory reporting requirements and the timing of the
commercial sources providing such data.

The cash flow projections were prepared utilizing a commercially available
software package marketed by David P. Cook & Associates.  We have generally
reviewed the output of the calculation procedures utilized by the program and
believe them to be mathematically correct for the purposes of this audit.
<PAGE>   237
Mr. A.E. Benton
Benton Oil and Gas Company
March 8, 1995
Page Three


PRODUCT PRICES
- --------------

It is our understanding that SEC regulations require future revenues to be
projected on the basis of product prices in effect on the "as of" date of the
report without further escalations or reductions.  However, certain variations
in product prices, attributable to contractual provisions, may be utilized in
the preparation of the cash flows where the prices are specified by the
contract.

The projections shown herein have been based on actual prices being received on
December 31, 1994.  These prices were held constant over the life of the
properties.

Market prices for both oil and gas continue to be subject to a significant
degree of variation in both domestic and international markets.  Future
variations in the projected prices may materially affect our projections of
economically recoverable reserves and associated revenues.

A comparison of the average product prices, weighted as a composite for all
properties, is as follows:

<TABLE>
<CAPTION>
          Constant Product Prices    Oil, $/bbl    Gas, $/Mcf
          -----------------------    ----------    ----------
          <S>                           <C>         <C>
          1995                          15.95       1.63
          Maximum                       16.00       1.75
          Average Over Life             15.94       1.63
</TABLE>

PROJECTIONS
- -----------

The estimated reserves and revenues have been projected on a calendar year
basis with the first time period being January 1, 1995, through December 31,
1995.

PROPERTY SALE
- -------------

The projections shown herein reflect the divestiture of interests owned by the
partnership in the Shallow Oil Reservoirs in West Cote Blanche Bay Field which
was effective January 1, 1995.  The partnership retained interests in the Gas
Cap Reservoirs in this property.

RESERVES ESTIMATES
- ------------------

Reserve estimates for the properties reviewed for the purpose of this audit
have been prepared with consideration of the available data and the nature of
the producing horizons.  The projections have been based on performance data
for the existing completions, analogy to other completions in the subject
reservoirs, and volumetric calculations.  Estimates prepared on the basis of
analogy and volumetric calculations will be subject to much greater variation
than those prepared for depletion drive reservoirs having established
production trends.

UMBRELLA POINT FIELD - This property operated by French Production,
Incorporated, is located in state waters offshore Chambers County, Texas, and
produces from multiple reservoirs.  Projections for this property were based
primarily on the extrapolation of production data with consideration for water
cut and pressure information, where available.  We have also utilized
information from our files from previous studies prepared by our firm relating
to this property.  In general, the productive reservoirs for this property are
in the latter stages of depletion and future recoveries may be influenced by
both mechanical and reservoir factors.

<PAGE>   238
Mr. A.E. Benton
Benton Oil and Gas Company
March 8, 1995
Page Four


WEST COTE BLANCHE BAY FIELD - Estimated reserves for the gas cap reservoirs
have been assigned on the basis of volumetric calculations for eight horizons
ranging in depth from 9,000 to 12,000 feet in three fault blocks.  The
volumetric calculations have been based on log-derived parameters and
geological interpretations prepared on the basis of subsurface information,
pressure information, and geophysical interpretations based on 3-D seismic
data.  Subsequent to our previous review, revised geological interpretations
have resulted in the transfer of reserves for the 12,600' reservoir to location
1-A (#868) from well #720 with no change in the estimated recoverable reserves.
Additional recoverable reserves have been assigned to the 38 and 38A reservoirs
based on geologic interpretations with consideration for historical performance
data.

The projected reserves for the #831 gas well, 13,900' reservoir, have been
revised relative to our July 1, 1994, evaluation on the basis of performance
data to reflect an ultimate recovery of 6,400 MMcf.  The remaining reserves for
this reservoir have been transferred to location 1- A (#868).


GENERAL CONCLUSIONS - On an overall basis, we have not encountered materials
differences in our reserve estimates and those prepared by Benton.  In cases
where we have encountered significant differences in estimated recoveries,
Benton has consented to the revision of its reserve estimates to be consistent
with projections by Huddleston.  The projected reserves shown herein will be
subject to a significant level of variation due to the nature of the subject
reservoirs, the stage of depletion of the producing horizons, the reserve
estimation techniques, and the actual schedule of future remedial and
development operations. 

Huddleston has relied on Benton to provide development schedules.  The
scheduling of future operations will be influenced by a variety of factors
including economic and market conditions, political considerations,
availability of funds, alternative investment opportunities, leasehold
obligations, and internal decision making.  Variations in the execution of
these development plans may have a material impact on the economic value of
both the discounted and undiscounted revenue streams.


OPERATING AND CAPITAL COSTS
- ---------------------------

Huddleston has reviewed operating costs utilized by Benton and believes they
are appropriate for the subject properties.  Costs for all properties were
consistent with historical levels.  Severance and ad valorem taxes were
deducted from gross revenues in accordance with statutory rates.  all taxes
(excluding income taxes) were estimated by Benton and have been deducted from
future revenues.

All capital costs were based on information provided by Benton.  Huddleston has
generally reviewed these costs and believes they are reasonable.  The capital
costs shown for the remedial operations for West Cote Blanche Bay Field have
been adjusted to reflect the statistical success rates of remedial operations
and variations in the depth of the historical and proposed operations.

All capital and operating expenditures were held constant over the life of the
properties.

FACTORS NOT INCLUDED
- --------------------

Values were not assigned to nonproducing acreage or to the salvage of surface
and subsurface equipment.

General office overhead, income taxes, and allowances for depletion,
depreciation, and amortization have not been deducted from future revenues.
<PAGE>   239
Mr. A.E. Benton
Benton Oil and Gas Company
March 8, 1995
Page Five


REPORT QUALIFICATIONS
- ---------------------

THE ESTIMATED REVENUES AND PRESENT VALUE OF THESE REVENUES ARE NOT REPRESENTED
AS MARKET VALUE.

Estimates for individual completions should be considered in context with the
overall or total estimated revenues.  Actual individual lease performances will
vary considerably from the projections particularly in comparison to the total
estimated production from all properties.

We did not inspect the properties or conduct independent well tests.
Ownership, product prices, and other factual data have been accepted as
represented by Benton.  We have generally tested these data and believe the
information is correct.

                                  Respectfully submitted,



                                  Peter D. Huddleston, P.E.

PDH:JPK:dbw
<PAGE>   240
                                                                    EXHIBIT C
                                  THE PROPOSAL

         Set forth below is a proposed amendment ("Amendment") to the Agreement
of Limited Partnership (the "Partnership Agreement") of Benton Oil and Gas
Combination Partnership 1989-1 Limited Partnership (the "Partnership").  This
Amendment shall be effective upon the acceptance pursuant to the Exchange Offer
of written consents from Investors holding not less than 75% of the Interests
in the Partnership.  If the Amendment becomes effective, it will become a
separate article of the Partnership Agreement and shall be placed immediately
after the last article contained in the Partnership Agreement.

                               PROPOSED AMENDMENT

         Notwithstanding any provisions of this Agreement to the contrary, it
is hereby agreed as follows:

         1.  Definitions.  Except as defined in the Partnership Agreement or
this article, each capitalized term used herein shall, for the purposes of this
article, have the meaning ascribed to it in the Prospectus of Benton Oil and
Gas Company, a Delaware corporation ("Benton"), dated ________________, 1995.

         2.  Elimination of Restrictions.  No provision of this Agreement shall
prohibit, limit or prevent (i) the transfer and conveyance of all the assets
and liabilities of the limited partnership formed by this Agreement (the
"Partnership") to Benton in exchange for Interests pursuant to and in
accordance with the terms of the Exchange Offer or otherwise, or (ii) the
distribution of Interests to partners of the Partnership ("Partners") upon
dissolution of the Partnership.  In addition, no consent of the Partnership or
any Partner, opinion of counsel or other procedure shall be required in order
to enable any Partner, the Partnership or Benton to effect any such transfer,
Exchange Offer or distribution.

         3.  Exchange of Partnership Assets and Liabilities for Interests.
Effective as of the Effective Date, the Partnership shall transfer and convey
all Partnership's assets and liabilities to Benton in exchange for Interests
pursuant to and in accordance with the terms of the Exchange Offer.

         4.  Election to Dissolve.  Immediately after consummation of the
Exchange Offer, the Partnership shall be dissolved.  Upon its dissolution, the
business and affairs of the Partnership shall be terminated and wound up and,
as soon as practicable thereafter, any and all Interests held by the
Partnership shall be distributed in kind to the Partners (or their assignees)
with each Partner (or his assignee) to receive a whole number of Common Stock
and Warrants equal to the Exchange Value of his Interest divided by the
Exchange Price.

         5.  Authority of General Partner.  Benton, in its capacity as managing
general partner of the Partnership, shall execute, acknowledge, verify,
deliver, file and record, for and in the name of the Partnership, any and all
documents and shall do and perform all acts required by applicable law or that
it deems necessary or desirable in order to give effect to this article and the
transactions contemplated herein, including by not limited to thedissolution,
termination, winding-up and distribution contemplated by paragraph 4 of this
article.

         6.  This Article Controlling.  The provisions of this article shall
control over all other provisions of this Agreement.

         Except as herein expressly amended, all other terms and provisions of
the Certificate and this Agreement shall remain in full force and effect.
<PAGE>   241
                                                                  
   EXHIBIT  C

                                  THE PROPOSAL


         Set forth below is a proposed amendment ("Amendment") to the Agreement
of Limited Partnership (the "Partnership Agreement") of Benton Oil and Gas
Combination Partnership 1990-1 Limited Partnership (the "Partnership").  This
Amendment shall be effective upon the acceptance pursuant to the Exchange Offer
of written consents from Investors holding not less than 75% of the Interests
in the Partnership.  If the Amendment becomes effective, it will become a
separate article of the Partnership Agreement and shall be placed immediately
after the last article contained in the Partnership Agreement.

                               PROPOSED AMENDMENT

         Notwithstanding any provisions of this Agreement to the contrary, it
is hereby agreed as follows:

         1.  Definitions.  Except as defined in the Partnership Agreement or
this article, each capitalized term used herein shall, for the purposes of this
article, have the meaning ascribed to it in the Prospectus of Benton Oil and
Gas Company, a Delaware corporation ("Benton"), dated ________________, 1995.

         2.  Elimination of Restrictions.  No provision of this Agreement shall
prohibit, limit or prevent (i) the transfer and conveyance of all the assets
and liabilities of the limited partnership formed by this Agreement (the
"Partnership") to Benton in exchange for Interests pursuant to and in
accordance with the terms of the Exchange Offer or otherwise, or (ii) the
distribution of Interests to partners of the Partnership ("Partners") upon
dissolution of the Partnership.  In addition, no consent of the Partnership or
any Partner, opinion of counsel or other procedure shall be required in order
to enable any Partner, the Partnership or Benton to effect any such transfer,
Exchange Offer or distribution.

         3.  Exchange of Partnership Assets and Liabilities for Interests.
Effective as of the Effective Date, the Partnership shall transfer and convey
all Partnership's assets and liabilities to Benton in exchange for Interests
pursuant to and in accordance with the terms of the Exchange Offer.

         4.  Election to Dissolve.  Immediately after consummation of the
Exchange Offer, the Partnership shall be dissolved.  Upon its dissolution, the
business and affairs of the Partnership shall be terminated and wound up and,
as soon as practicable thereafter, any and all Interests held by the
Partnership shall be distributed in kind to the Partners (or their assignees)
with each Partner (or his assignee) to receive a whole number of Common Stock
and Warrants equal to the Exchange Value of his Interest divided by the
Exchange Price.

         5.  Authority of General Partner.  Benton, in its capacity as managing
general partner of the Partnership, shall execute, acknowledge, verify,
deliver, file and record, for and in the name of the Partnership, any and all
documents and shall do and perform all acts required by applicable law or that
it deems necessary or desirable in order to give effect to this article and the
transactions contemplated herein, including by not limited to the dissolution,
termination, winding-up and distribution contemplated by paragraph 4 of this
article.

         6.  This Article Controlling.  The provisions of this article shall
control over all other provisions of this Agreement.

         Except as herein expressly amended, all other terms and provisions of
the Certificate and this Agreement shall remain in full force and effect.
<PAGE>   242
                                                                  
   EXHIBIT  C

                                  THE PROPOSAL


         Set forth below is a proposed amendment ("Amendment") to the Agreement
of Limited Partnership (the "Partnership Agreement") of Benton Oil and Gas
Combination Partnership 1991-1 Limited Partnership (the "Partnership").  This
Amendment shall be effective upon the acceptance pursuant to the Exchange Offer
of written consents from Investors holding not less than 75% of the Interests
in the Partnership.  If the Amendment becomes effective, it will become a
separate article of the Partnership Agreement and shall be placed immediately
after the last article contained in the Partnership Agreement.

                               PROPOSED AMENDMENT

         Notwithstanding any provisions of this Agreement to the contrary, it
is hereby agreed as follows:

         1.  Definitions.  Except as defined in the Partnership Agreement or
this article, each capitalized term used herein shall, for the purposes of this
article, have the meaning ascribed to it in the Prospectus of Benton Oil and
Gas Company, a Delaware corporation ("Benton"), dated ________________, 1995.

         2.  Elimination of Restrictions.  No provision of this Agreement shall
prohibit, limit or prevent (i) the transfer and conveyance of all the assets
and liabilities of the limited partnership formed by this Agreement (the
"Partnership") to Benton in exchange for Interests pursuant to and in
accordance with the terms of the Exchange Offer or otherwise, or (ii) the
distribution of Interests to partners of the Partnership ("Partners") upon
dissolution of the Partnership.  In addition, no consent of the Partnership or
any Partner, opinion of counsel or other procedure shall be required in order
to enable any Partner, the Partnership or Benton to effect any such transfer,
Exchange Offer or distribution.

         3.  Exchange of Partnership Assets and Liabilities for Interests.
Effective as of the Effective Date, the Partnership shall transfer and convey
all Partnership's assets and liabilities to Benton in exchange for Interests
pursuant to and in accordance with the terms of the Exchange Offer.

         4.  Election to Dissolve.  Immediately after consummation of the
Exchange Offer, the Partnership shall be dissolved.  Upon its dissolution, the
business and affairs of the Partnership shall be terminated and wound up and,
as soon as practicable thereafter, any and all Interests held by the
Partnership shall be distributed in kind to the Partners (or their assignees)
with each Partner (or his assignee) to receive a whole number of Common Stock
and Warrants equal to the Exchange Value of his Interest divided by the
Exchange Price.

         5.  Authority of General Partner.  Benton, in its capacity as managing
general partner of the Partnership, shall execute, acknowledge, verify,
deliver, file and record, for and in the name of the Partnership, any and all
documents and shall do and perform all acts required by applicable law or that
it deems necessary or desirable in order to give effect to this article and the
transactions contemplated herein, including by not limited to the dissolution,
termination, winding-up and distribution contemplated by paragraph 4 of this
article.

         6.  This Article Controlling.  The provisions of this article shall
control over all other provisions of this Agreement.

         Except as herein expressly amended, all other terms and provisions of
the Certificate and this Agreement shall remain in full force and effect.
<PAGE>   243
                                                         EXHIBIT  D

                           BENTON OIL AND GAS COMPANY

                             LETTER OF TRANSMITTAL
                                      FOR
                                  INVESTORS IN
            BENTON OIL AND GAS COMBINATION PARTNERSHIP 1989 - 1 L.P.


         Capitalized terms used but not defined herein have the meanings given
to them in the Prospectus of Benton Oil and Gas Company, as supplemented or
amended (the "Prospectus").  General instructions are included in Part VI.

         This Letter of Transmittal must be received by the Exchange Agent on
or before 5:00 p.m. Eastern Time, on ______________, 1995 unless the Exchange
Offer is extended.  To accept the Exchange Offer or withhold consent to the
related Proposal, please complete this Letter in accordance with the
Instructions in Items IV and VI, and send or deliver the completed Letter of
Transmittal to the Exchange Agent.  Neither accepting the Exchange Offer nor
withholding consent to the Proposal will prevent an Investor from challenging
the fairness of the Exchange Offer.

         Adoption of the Proposal requires consent by Investors holding 75% of
the units in the Partnership.  Assuming consummation of the Exchange Offer, all
of the partners of the Partnership, whether or not they tender their Interests,
will receive the same number of shares of Common Stock and Warrants they would
have received had they tendered their Interests, except that California
investors exercising their limited dissenters' rights may receive a higher or
lower number of shares or warrants.  See Part V below and "The Exchange Offer
and Proposal" in the Prospectus.



                  Exchange Agent:  Benton Oil and Gas Company

                              By Mail or By Hand:
                              -------------------
                           Benton Oil and Gas Company
                         1145 Eugenia Place, Suite 200
                         Carpenteria, California 93013
                    Attention: Investor Relations Department

         Delivery of this Form is at the risk of the Investor.  If sent by U.S.
Mail, it is recommended that an Investor use certified mail, return receipt
requested.

                                     PART I

                          NAME AND ADDRESS OF INVESTOR

          
          ---------------------------------------------------------
                                      
                                      
          ---------------------------------------------------------
                                      
                                      
          ----------------------------------------------------------
<PAGE>   244
                                    PART II

                            DESCRIPTION OF INTERESTS

         Set forth below with respect to your Interest are (i) the number of
Partnership Interests held of record, (ii) the Exchange Value attributable to
your Interest and (iii) the number of shares of Common Stock and Warrants
offered for your Interest.

<TABLE>
   <S>                             <C>                            <C>                          <C>
   Partnership                     Exchange                       Common
    Interests                        Value                        Shares                       Warrants
    ---------                        -----                        ------                       --------
</TABLE>





                                    PART III

          REPRESENTATIONS, WARRANTIES, COVENANTS AND POWER OF ATTORNEY

         An Investor checking the "Tender and Consent" box and signing Part IV
below ("Consenting Investor") hereby (i) accepts the Exchange Offer on the
terms and subject to the conditions set forth in the Prospectus, receipt of a
copy of which is hereby acknowledged, and tenders to Benton Oil and Gas Company
("Benton") all of his Interest in the Partnership, thereby consenting to the
Proposal, and (ii) subject to acceptance of the tender made hereby, sells,
transfers, contributes and assigns to Benton all right, title and interest in
the Interest tendered hereby.  Tenders of Interests are revocable upon written
notice to Benton at any time prior to the Expiration Date. 

         An Investor checking the "Withhold Consent" box and signing Part IV
below or Part V for California residents ("Non-consenting Investor") hereby (i)
acknowledges receipt of the Prospectus and (ii) assuming adoption of the
Proposal, accept the Common Stock and Warrants offered in exchange for all
right, title and interest in the Interest represented by the Partnership
Interests set forth above.

         The undersigned Investor represents and warrants to Benton that, as of
the Closing Date, (i) he has not disposed of or agreed to dispose of his
Interest other than pursuant to the Exchange Offer, (ii) upon exchange of his
Interest pursuant to the Exchange Offer, Benton will acquire good and
marketable title to the Interest, free and clear of all liens, encumbrances and
adverse claims, (iii) he has full legal right, power and authority to convey
his Interest pursuant to the Exchange Offer, (iv) he has received and reviewed
a copy of the Prospectus and (v) he is qualified to make decisions with respect
to investments presenting an investment decision similar to that involved in
the Exchange Offer.  All representations, warranties and covenants contained
herein shall survive the Closing Date and all other transactionscontemplated by
this Letter and the Prospectus.

         In connection with the solicitation of written consents of Investors
in the Partnership, each Consenting Investor below hereby (i) represents and
warrants to Benton that he has full legal right, power and authority to execute
a written consent with respect to the Proposal and (ii) consents to the
adoption of the Proposal to amend the Partnership Agreement, as described in
the Prospectus. 

<PAGE>   245
         The undersigned Investor hereby irrevocably appoints Benton or any
designee of Benton, with full power of substitution, as his true and lawful
attorney-in-fact, in his name, place and stead, to execute on behalf of the
Investor any additional documents necessary to consummate the Exchange and the
withdrawal and transfer of the assets underlying his Interest.  This power of
attorney shall become effective upon acceptance by Benton of his Interest,
shall be deemed coupled with an interest, shall be irrevocable (except in the
event of a withdrawal of a Consenting Investor's tender of his Interest
following a modification or amendment of the Exchange Offer), is granted in
consideration of the acceptance of his Interest, shall survive the death,
incapacity, dissolution or termination of the existence of the Investor and
shall be binding upon the Investor's heirs, legal representatives or assigns.


          The following information must be completed in order to
entitle the Soliciting Dealer to receive a fee in connection with the
Exchange Offer.



                                      
                                        ----------------------------------------
                                        Name of Soliciting Dealer
                                            (Please Print)



                                      
                                        ----------------------------------------
                                        Name of Account Executive 
                                            (Please Print)



                                      
                                        ----------------------------------------
                                        City and State of Account Executive
<PAGE>   246
                                    PART IV

                                 ALL INVESTORS
           (EXCEPT NON-CONSENTING CALIFORNIA RESIDENTS.  SEE PART V)

         CALIFORNIA INVESTORS ELECTING TO EXERCISE DISSENTERS' RIGHTS SHOULD
INSTEAD COMPLETE PART V.

         Consent to the Proposal being submitted by Benton to adopt the
Amendment to the Partnership Agreement:

  [ ]     Tender and Consent                         [ ]     Withhold Consent

         CASH ELECTION

         Subject to the availability to elect a cash payment in lieu of Benton
Common Stock, I hereby elect to receive Cash rather than Benton Common  
Stock. [ ]

                                 SIGNATURE BOX
           (NOT FOR NON-CONSENTING CALIFORNIA RESIDENTS.  SEE PART V)

Please sign exactly as your name  is printed in Part I above,                  
unless printed incorrectly.

When signing as partner, a general corporate officer, attorney-in-fact,
executor, administrator, trustee or guardian, please give full title and send
proper evidence of authority with this consent.  For joint owners, each joint
owner must sign.

- -----------------------------------------------------
Full Name of Investor
   (Please Print)

- -----------------------------------------------------
Full Name of Co-owner, if any
      (Please Print)



- -----------------------------------------------------
Signature of Investor
   (Please Print)

- -----------------------------------------------------
 Signature of Co-owner, if any
      (Please Print)
      Business Telephone: (_____) ____________________
 

      Home Telephone:    (_____) _____________________
 
      Dated ______________________________________,1995

IF THE INVESTOR FAILS TO INDICATE WHETHER CONSENT TO THE PROPOSAL IS GIVEN OR
WITHHELD, CONSENT WILL BE DEEMED TO BE GIVEN.
<PAGE>   247
                                     PART V

                      NON-CONSENTING CALIFORNIA INVESTORS

         COMPLETE ONLY IF YOU DO NOT WISH TO TENDER YOUR INTEREST PURSUANT TO
THE EXCHANGE OFFER AND WISH TO EXERCISE YOUR DISSENTERS' RIGHTS.

         The Non-consenting Investor signing in this Part V represents that
California is the Investor's state of residence and withholds his consent to
the Proposal to approve and adopt the Amendment to the Program Agreement.  By
withholding consent, a Non-consenting California Investor will exercise his
dissenters' rights and will be deemed to have made the representations,
warranties and covenants (other than the consent to the adoption of the
Proposal) set forth in Part III above, and he will receive, pursuant to those
dissenters' rights, the number of shares of Common Stock equal to the Exchange
Value of his Interest divided by the average closing prices of the Units on
NASDAQ-NMS during the twenty trading days immediately after the Closing Date.

                                 SIGNATURE BOX
                 (ONLY FOR NON-CONSENTING CALIFORNIA RESIDENTS)

Please sign exactly as 
your name is printed in Part
I above, unless printed  
incorrectly.  When  signing
as general partner, corporate officer, 
attorney-in-fact, executor,
administrator,  trustee or guardian,    
please give full title and
send proper evidence of with             
this consent. For join                 ----------------------------------------
owners, each joint owner must sign.         Full Name of Investor authority  
                                                    (Please Print)


                                      
                                       ----------------------------------------
                                              Full Name of Co-owner, if any 
                                                    (Please Print)


                                       
                                       ----------------------------------------
                                                  Signature of Investor



                                        
                                       
                                       ----------------------------------------
                                               Signature of Co-owner, if any

                                        Business Telephone:  (    )
                                                              ----  --------
                                        Home Telephone:      (    )
                                                              ----  --------   
                                         Dated                          , 1995 
                                              --------------------------
                                              
<PAGE>   248
                                    PART VI


                                  INSTRUCTIONS


         1.  Previously Transferred Interests.  If an Investor has transferred,
whether by sale, gift, death or otherwise, the beneficial ownership of any
Interest of which he has been named a holder of record in the accompanying
Letter of Transmittal without previously notifying Benton or complying with the
procedures set forth in the Partnership Agreement for transferring his Interest
in the Partnership, he should notify Benton of that fact and identify the
Interest transferred, the date of transfer and the name, address and tax
identification number of the assignee.  Benton will then send the Investor and
the assignee revised Letters of Transmittal and request from the Investor or
assignee such other documents as it may require in order to facilitate the
tender, if desired, of an assignee's interest in the Partnership.

         2.  Participation in Exchange.  To be entitled to receive the Common
Stock and Warrants in the Exchange, even if consent to the Proposal is
withheld, an Investor must deliver one copy of the Letter of Transmittal,
completed, dated and signed in the Signature Box in Part IV or the Signature
Box in Part V for Non-consenting California residents.  Delivery is at the risk
of the Investor.  A tender will be effective only when the Letter is actually
received by the Exchange Agent.  The Letter must be received by the Exchange
Agent on or before 5:00 p.m. Eastern Time, on ________________ unless the
Exchange Offer is extended, in which event the Letter must be received by the
latest time and date on which the Exchange Offer, as so extended, will expire.

         3.  Signatures.  The Letter must be signed by the Investor whose name
appears in Part I of the Letter.  If the Interest is held in the names of two
or more persons, all such persons must sign the Letter.  With respect to
Interests held by entities such as trusts, joint ventures, limited partnerships
or general partnerships, Benton may require that the Letter of Transmittal be
accompanied by evidence acceptable to Benton that the entity has met all
requirements of its governing instruments, such as applicable partnership or
joint venture agreements, and that the person signing the Letter is authorized
to sign for the Investor under the laws of the jurisdiction in which the entity
was organized.

         TO PARTICIPATE IN THE EXCHANGE OFFER, AN INVESTOR MUST SIGN IN THE
SIGNATURE BLOCK IN PART IV (OR PART V FOR CALIFORNIA INVESTORS), EVEN IF HE
OBJECTS TO THE EXCHANGE OFFER AND ELECTS TO WITHHOLD HIS CONSENT TO THE
PROPOSAL.  INVESTORS WILL NOT RECEIVE UNITS IN THE EXCHANGE UNTIL A SIGNED
LETTER OF TRANSMITTAL IS RETURNED. 

         4.  Conditional Tenders.  No alternative, conditional or contingent
tenders will be accepted.

         5.  Withdrawal of Tenders.  Tenders of Interests and consents to the
Proposal are revocable at any time prior to the Expiration Date by delivering a
notice of withdrawal to Benton.

         6.  Validity of Tenders.  All questions on the validity, form,
eligibility (including time of receipt) and acceptance of Interests will be
determined by Benton, and its determination will be final and binding.
Interpretation by Benton of the terms and conditions of the Exchange Offer
(including the instructions to the Letter of Transmittal) will also be final
and binding.  Benton reserves the right to waive any irregularities or
conditions on the manner of tender, and the interpretation by Benton of the
terms and conditions of the Exchange Offer (including the instructions in the
Letter of Transmittal) shall be final and binding.  Any irregularities in
connection with tenders must be cured within such time as Benton shall
determine unless waived by it.
<PAGE>   249
         Tenders will be deemed not to have been made until any irregularities
have been cured or waived.  Any Letter of Transmittal which is not properly
completed and executed, and as to which irregularities are not cured or waived,
will be returned by Benton to the Investor as soon as practicable.  Benton is
under no duty to give notification of defects in tenders and will not incur any
liability for failure to give notification.

         Benton will not accept tenders of less than all of an Investor's
Interest in the Partnership.

         7.  Consents to Proposal.  A tender of an Interest constitutes a
consent to the Proposal.  Only persons who are holders of record of Partnership
Interests on the date of the Prospectus may vote on the Proposal.

         8.  Dissenters' Rights for California Residents.  Investors residing
in California have limited dissenters' rights in accordance with the
requirements for rollup transactions.  By signing Part V and thereby
withholding consent to the Proposal, Investors in that State will be deemed to
exercise their dissenters' rights and will receive the number of Shares of
Common Stock equal to the Exchange Value of their Interests divided by the
average closing prices of the Units on NASDAQ-NMS during the twenty trading
days immediately after the Closing Date.  Each California Investor withholding
consent to the Proposal will also be deemed to have tendered his Interest for
that number of Units and therefore will not be required to separately submit an
executed Transfer Application.  If the average price of the Units during the
specified period after the Closing Date is lower than the Exchange Price,
dissenting California Investors will receive more for their Interests than they
would otherwise receive in the Exchange Offer.  Any increase in the market
price of the Common Stock during that period relative to the Exchange Price,
however, would reduce the number of shares that dissenting California Investors
will receive in the Exchange Offer.

         Although the rollup requirements for California residents entitle them
to an appraisal in rollup transactions involving their investments, Investors
residing in California who exercise these dissenters' rights will not be
entitled to a separate appraisal for their Interests because the Exchange Value
of the Common Stock determined by Benton exceeds the liquidation value assigned
to the Partnership's net assets in an independent appraisal already performed
in accordance with the Partnership Agreement. 
<PAGE>   250
                                                                  
                                                                   EXHIBIT  D

                           BENTON OIL AND GAS COMPANY

                             LETTER OF TRANSMITTAL
                                      FOR
                                  INVESTORS IN
            BENTON OIL AND GAS COMBINATION PARTNERSHIP 1990 - 1 L.P.


         Capitalized terms used but not defined herein have the meanings given
to them in the Prospectus of Benton Oil and Gas Company, as supplemented or
amended (the "Prospectus").  General instructions are included in Part VI.

         This Letter of Transmittal must be received by the Exchange Agent on
or before 5:00 p.m. Eastern Time, on ______________, 1995 unless the Exchange
Offer is extended.  To accept the Exchange Offer or withhold consent to the
related Proposal, please complete this Letter in accordance with the
Instructions in Items IV and VI, and send or deliver the completed Letter of
Transmittal to the Exchange Agent.  Neither accepting the Exchange Offer nor
withholding consent to the Proposal will prevent an Investor from challenging
the fairness of the Exchange Offer.

         Adoption of the Proposal requires consent by Investors holding 75% of
the units in the Partnership.  Assuming consummation of the Exchange Offer, all
of the partners of the Partnership, whether or not they tender their Interests,
will receive the same number of shares of Common Stock and Warrants they would
have received had they tendered their Interests, except that California
investors exercising their limited dissenters' rights may receive a higher or
lower number of shares or warrants.  See Part V below and "The Exchange Offer
and Proposal" in the Prospectus. 



                  Exchange Agent:  Benton Oil and Gas Company

                              By Mail or By Hand:
                              ------------------

                           Benton Oil and Gas Company
                         1145 Eugenia Place, Suite 200
                         Carpenteria, California 93013
                    Attention: Investor Relations Department

         Delivery of this Form is at the risk of the Investor.  If sent by U.S.
Mail, it is recommended that an Investor use certified mail, return receipt
requested.

                                     PART I

                          NAME AND ADDRESS OF INVESTOR

          
          _________________________________________________________
                                      
                                      
          _________________________________________________________
                                      
                                      
          _________________________________________________________
<PAGE>   251
                                    PART II

                            DESCRIPTION OF INTERESTS

         Set forth below with respect to your Interest are (i) the number of
Partnership Interests held of record, (ii) the Exchange Value attributable to
your Interest and (iii) the number of shares of Common Stock and Warrants
offered for your Interest.

<TABLE>
  <S>                             <C>                            <C>                   <C>
   Partnership                     Exchange                       Common
     Interests                        Value                        Shares               Warrants
  ------------                     --------                       -------               --------

</TABLE>




                                    PART III

          REPRESENTATIONS, WARRANTIES, COVENANTS AND POWER OF ATTORNEY

         An Investor checking the "Tender and Consent" box and signing Part IV
below ("Consenting Investor") hereby (i) accepts the Exchange Offer on the
terms and subject to the conditions set forth in the Prospectus, receipt of a
copy of which is hereby acknowledged, and tenders to Benton Oil and Gas Company
("Benton") all of his Interest in the Partnership, thereby consenting to the
Proposal, and (ii) subject to acceptance of the tender made hereby, sells,
transfers, contributes and assigns to Benton all right, title and interest in
the Interest tendered hereby.  Tenders of Interests are revocable upon written
notice to Benton at any time prior to the Expiration Date.

         An Investor checking the "Withhold Consent" box and signing Part IV
below or Part V for California residents ("Non-consenting Investor") hereby (i)
acknowledges receipt of the Prospectus and (ii) assuming adoption of the
Proposal, accept the Common Stock and Warrants offered in exchange for all
right, title and interest in the Interest represented by the Partnership
Interests set forth above.

         The undersigned Investor represents and warrants to Benton that, as of
the Closing Date, (i) he has not disposed of or agreed to dispose of his
Interest other than pursuant to the Exchange Offer, (ii) upon exchange of his
Interest pursuant to the Exchange Offer, Benton will acquire good and
marketable title to the Interest, free and clear of all liens, encumbrances and
adverse claims, (iii) he has full legal right, power and authority to convey
his Interest pursuant to the Exchange Offer, (iv) he has received and reviewed
a copy of the Prospectus and (v) he is qualified to make decisions with respect
to investments presenting an investment decision similar to that involved in
the Exchange Offer.  All representations, warranties and covenants contained
herein shall survive the Closing Date and all other transactions contemplated
by this Letter and the Prospectus.
         
         In connection with the solicitation of written consents of Investors
in the Partnership, each Consenting Investor below hereby (i) represents and
warrants to Benton that he has full legal right, power and authority to execute
a written consent with respect to the Proposal and (ii) consents to the
adoption of the Proposal to ament the Partnership Agreement, as described in
the Prospectus. 

<PAGE>   252


         The undersigned Investor hereby irrevocably appoints Benton or any
designee of Benton, with full power of substitution, as his true and lawful
attorney-in-fact, in his name, place and stead, to execute on behalf of the
Investor any additional documents necessary to consummate the Exchange and the
withdrawal and transfer of the assets underlying his Interest.  This power of
attorney shall become effective upon acceptance by Benton of his Interest,
shall be deemed coupled with an interest, shall be irrevocable (except in the
event of a withdrawal of a Consenting Investor's tender of his Interest
following a modification or amendment of the Exchange Offer), is granted in
consideration of the acceptance of his Interest, shall survive the death,
incapacity, dissolution or termination of the existence of the Investor and
shall be binding upon the Investor's heirs, legal representatives or assigns.



         The following information must be completed in order to entitle the
Soliciting Dealer to receive a fee in connection with the Exchange Offer.



                                       
                                        ________________________________________
                                                Name of Soliciting Dealer
                                                     (Please Print)



                                       
                                        ________________________________________
                                                Name of Account Executive
                                                     (Please Print)



                                       
                                        ________________________________________
                                           City and State of Account Executive
<PAGE>   253
                                    PART IV

                                 ALL INVESTORS
           (EXCEPT NON-CONSENTING CALIFORNIA RESIDENTS.  SEE PART V)

         CALIFORNIA INVESTORS ELECTING TO EXERCISE DISSENTERS' RIGHTS SHOULD
INSTEAD COMPLETE PART V.

         Consent to the Proposal being submitted by Benton to adopt the
Amendment to the Partnership Agreement:

    [ ]     Tender and Consent                         [ ]     Withhold Consent

         CASH ELECTION

        Subject to the availability to elect a cash payment in lieu of Benton
Common Stock, I hereby elect to receive Cash rather than Benton Common 
Stock. [ ]

                                 SIGNATURE BOX
           (NOT FOR NON-CONSENTING CALIFORNIA RESIDENTS.  SEE PART V)

        Please sign exactly as your name is printed in Part I above, unless
printed incorrectly.   

        When signing as a general  partner, corporate officer, 
attorney-in-fact,  executor, administrator, trustee or  guardian,
please give full title and send proper evidence of authority with this
consent.  For joint owners, each joint owner must sign.

 _____________________________________________________
 Full Name of Investor
   (Please Print)

 _____________________________________________________
 Full Name of Co-owner, if any
     (Please Print)


 _____________________________________________________
 Signature of Investor
    (Please Print)


 _____________________________________________________
 Signature of Co-owner, if any
     (Please Print)

      Business Telephone: (_____) ____________________
 

      Home Telephone:    (_____) _____________________
 
      Dated __________________________________________, 1995

IF THE INVESTOR FAILS TO INDICATE WHETHER CONSENT TO THE PROPOSAL
IS GIVEN OR WITHHELD, CONSENT WILL BE DEEMED TO BE GIVEN.
<PAGE>   254
                                     PART V

                      NON-CONSENTING CALIFORNIA INVESTORS

         COMPLETE ONLY IF YOU DO NOT WISH TO TENDER YOUR INTEREST PURSUANT TO
THE EXCHANGE OFFER AND WISH TO EXERCISE YOUR DISSENTERS' RIGHTS.

         The Non-consenting Investor signing in this Part V represents that
California is the Investor's state of residence and withholds his consent to
the Proposal to approve and adopt the Amendment to the Program Agreement.  By
withholding consent, a Non-consenting California Investor will exercise his
dissenters' rights and will be deemed to have made the representations,
warranties and covenants (other than the consent to the adoption of the
Proposal) set forth in Part III above, and he will receive, pursuant to those
dissenters' rights, the number of shares of Common Stock equal to the Exchange
Value of his Interest divided by the average closing prices of the Units on
NASDAQ-NMS during the twenty trading days immediately after the Closing Date.

                                 SIGNATURE BOX
                 (ONLY FOR NON-CONSENTING CALIFORNIA RESIDENTS)

 Please sign exactly as  your name is printed in Part
 I above, unless printed  incorrectly.  When  signing
 as general partner,  corporate officer, 
 attorney-in-fact, executor,administrator, 
 trustee or guardian, please give  full   -------------------------------------
 title and send proper evidence of         Full Name of Investor authority
 with this consent.  For                            (Please Print)
 joint owners, each  joint owner must 
 sign.                      


                                        
                                          -------------------------------------
                                           Full Name of Co-owner, if any 
                                                  (Please Print)


                                        
                                          -------------------------------------
                                           Signature of Investor



                                       
                                          -------------------------------------
                                           Signature of Co-owner, if any

                                 Business Telephone:  (    )
                                                       ----  ------------------
                                                    
                                 Home Telephone:      (    )
                                                       ----  ------------------

                                 Dated
                                      -----------------------------------, 1995
<PAGE>   255
                                    PART VI


                                  INSTRUCTIONS


         1.  Previously Transferred Interests.  If an Investor has transferred,
whether by sale, gift, death or otherwise, the beneficial ownership of any
Interest of which he has been named a holder of record in the accompanying
Letter of Transmittal without previously notifying Benton or complying with the
procedures set forth in the Partnership Agreement for transferring his Interest
in the Partnership, he should notify Benton of that fact and identify the
Interest transferred, the date of transfer and the name, address and tax
identification number of the assignee.  Benton will then send the Investor and
the assignee revised Letters of Transmittal and request from the Investor or
assignee such other documents as it may require in order to facilitate the
tender, if desired, of an assignee's interest in the Partnership.

         2.  Participation in Exchange.  To be entitled to receive the Common
Stock and Warrants in the Exchange, even if consent to the Proposal is
withheld, an Investor must deliver one copy of the Letter of Transmittal,
completed, dated and signed in the Signature Box in Part IV or the Signature
Box in Part V for Non-consenting California residents.  Delivery is at the risk
of the Investor.  A tender will be effective only when the Letter is actually
received by the Exchange Agent.  The Letter must be received by the Exchange
Agent on or before 5:00 p.m. Eastern Time, on ________________ unless the
Exchange Offer is extended, in which event the Letter must be received by the
latest time and date on which the Exchange Offer, as so extended, will expire.

         3.  Signatures.  The Letter must be signed by the Investor whose name
appears in Part I of the Letter.  If the Interest is held in the names of two
or more persons, all such persons must sign the Letter.  With respect to
Interests held by entities such as trusts, joint ventures, limited partnerships
or general partnerships, Benton may require that the Letter of Transmittal be
accompanied by evidence acceptable to Benton that the entity has met all
requirements of its governing instruments, such as applicable partnership or
joint venture agreements, and that the person signing the Letter is authorized
to sign for the Investor under the laws of the jurisdiction in which the entity
was organized.

         TO PARTICIPATE IN THE EXCHANGE OFFER, AN INVESTOR MUST SIGN IN THE
SIGNATURE BLOCK IN PART IV (OR PART V FOR CALIFORNIA INVESTORS), EVEN IF HE
OBJECTS TO THE EXCHANGE OFFER AND ELECTS TO WITHHOLD HIS CONSENT TO THE
PROPOSAL.  INVESTORS WILL NOT RECEIVE UNITS IN THE EXCHANGE UNTIL A SIGNED
LETTER OF TRANSMITTAL IS RETURNED. 

         4.  Conditional Tenders.  No alternative, conditional or contingent
tenders will be accepted.

         5.  Withdrawal of Tenders.  Tenders of Interests and consents to the
Proposal are revocable at any time prior to the Expiration Date by delivering a
notice of withdrawal to Benton. 

         6.  Validity of Tenders.  All questions on the validity, form,
eligibility (including time of receipt) and acceptance of Interests will be
determined by Benton, and its determination will be final and binding.
Interpretation by Benton of the terms and conditions of the Exchange Offer
(including the instructions to the Letter of Transmittal) will also be final
and binding.  Benton reserves the right to waive any irregularities or
conditions on the manner of tender, and the interpretation by Benton of the
terms and conditions of the Exchange Offer (including the instructions in the
Letter of Transmittal) shall be final and binding.  Any irregularities in
connection with tenders must be cured within such time as Benton shall
determine unless waived by it.
<PAGE>   256
         Tenders will be deemed not to have been made until any irregularities
have been cured or waived.  Any Letter of Transmittal which is not properly
completed and executed, and as to which irregularities are not cured or waived,
will be returned by Benton to the Investor as soon as practicable.  Benton is
under no duty to give notification of defects in tenders and will not incur any
liability for failure to give notification.

         Benton will not accept tenders of less than all of an Investor's 
Interest in the Partnership. 

         7.  Consents to Proposal.  A tender of an Interest constitutes a
consent to the Proposal.  Only persons who are holders of record of Partnership
Interests on the date of the Prospectus may vote on the Proposal. 

         8.  Dissenters' Rights for California Residents.  Investors residing
in California have limited dissenters' rights in accordance with the
requirements for rollup transactions.  By signing Part V and thereby
withholding consent to the Proposal, Investors in that State will be deemed to
exercise their dissenters' rights and will receive the number of Shares of
Common Stock equal to the Exchange Value of their Interests divided by the
average closing prices of the Units on NASDAQ-NMS during the twenty trading
days immediately after the Closing Date.  Each California Investor withholding
consent to the Proposal will also be deemed to have tendered his Interest for
that number of Units and therefore will not be required to separately submit an
executed Transfer Application.  If the average price of the Units during the
specified period after the Closing Date is lower than the Exchange Price,
dissenting California Investors will receive more for their Interests than they
would otherwise receive in the Exchange Offer.  Any increase in the market
price of the Common Stock during that period relative to the Exchange Price,
however, would reduce the number of shares that dissenting California Investors
will receive in the Exchange Offer.

         Although the rollup requirements for California residents entitle them
to an appraisal in rollup transactions involving their investments, Investors
residing in California who exercise these dissenters' rights will not be
entitled to a separate appraisal for their Interests because the Exchange Value
of the Common Stock determined by Benton exceeds the liquidation value assigned
to the Partnership's net assets in an independent appraisal already performed
in accordance with the Partnership Agreement.
<PAGE>   257
                                                                  
                                                                   EXHIBIT  D

                           BENTON OIL AND GAS COMPANY

                             LETTER OF TRANSMITTAL
                                      FOR
                                  INVESTORS IN
            BENTON OIL AND GAS COMBINATION PARTNERSHIP 1991 - 1 L.P.


         Capitalized terms used but not defined herein have the meanings given
to them in the Prospectus of Benton Oil and Gas Company, as supplemented or
amended (the "Prospectus").  General instructions are included in Part VI.

         This Letter of Transmittal must be received by the Exchange Agent on
or before 5:00 p.m. Eastern Time, on ______________, 1995 unless the Exchange
Offer is extended.  To accept the Exchange Offer or withhold consent to the
related Proposal, please complete this Letter in accordance with the
Instructions in Items IV and VI, and send or deliver the completed Letter of
Transmittal to the Exchange Agent.  Neither accepting the Exchange Offer nor
withholding consent to the Proposal will prevent an Investor from challenging
the fairness of the Exchange Offer. 

         Adoption of the Proposal requires consent by Investors holding 75% of
the units in the Partnership.  Assuming consummation of the Exchange Offer, all
of the partners of the Partnership, whether or not they tender their Interests,
will receive the same number of shares of Common Stock and Warrants they would
have received had they tendered their Interests, except that California
investors exercising their limited dissenters' rights may receive a higher or
lower number of shares or warrants.  See Part V below and "The Exchange Offer
and Proposal" in the Prospectus.



                  Exchange Agent:  Benton Oil and Gas Company

                              By Mail or By Hand:
                              -------------------

                           Benton Oil and Gas Company
                         1145 Eugenia Place, Suite 200
                         Carpenteria, California 93013
                    Attention: Investor Relations Department

         Delivery of this Form is at the risk of the Investor.  If sent by U.S.
Mail, it is recommended that an Investor use certified mail,
return receipt requested.

                                     PART I

                          NAME AND ADDRESS OF INVESTOR

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

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

                          -----------------------------
<PAGE>   258
                                    PART II

                            DESCRIPTION OF INTERESTS

         Set forth below with respect to your Interest are (i) the number of
Partnership Interests held of record, (ii) the Exchange Value attributable to
your Interest and (iii) the number of shares of Common Stock and Warrants
offered for your Interest.
<TABLE>
<S>                     <C>                     <C>            <C>
Partnership             Exchange               Common  
Interests               Value                  Shares         Warrants  
- ---------               -----                  ------         --------
                     
</TABLE>



                                    PART III

          REPRESENTATIONS, WARRANTIES, COVENANTS AND POWER OF ATTORNEY

         An Investor checking the "Tender and Consent" box and signing Part IV
below ("Consenting Investor") hereby (i) accepts the Exchange Offer on the
terms and subject to the conditions set forth in the Prospectus, receipt of a
copy of which is hereby acknowledged, and tenders to Benton Oil and Gas Company
("Benton") all of his Interest in the Partnership, thereby consenting to the
Proposal, and (ii) subject to acceptance of the tender made hereby, sells,
transfers, contributes and assigns to Benton all right, title and interest in
the Interest tendered hereby.  Tenders of Interests are revocable upon written
notice to Benton at any time prior to the Expiration Date.

         An Investor checking the "Withhold Consent" box and signing Part IV
below or Part V for California residents ("Non-consenting Investor") hereby (i)
acknowledges receipt of the Prospectus and (ii) assuming adoption of the
Proposal, accept the Common Stock and Warrants offered in exchange for all
right, title and interest in the Interest represented by the Partnership
Interests set forth above. 

         The undersigned Investor represents and warrants to Benton that, as of
the Closing Date, (i) he has not disposed of or agreed to dispose of his
Interest other than pursuant to the Exchange Offer, (ii) upon exchange of his
Interest pursuant to the Exchange Offer, Benton will acquire good and
marketable title to the Interest, free and clear of all liens, encumbrances and
adverse claims, (iii) he has full legal right, power and authority to convey
his Interest pursuant to the Exchange Offer, (iv) he has received and reviewed
a copy of the Prospectus and (v) he is qualified to make decisions with respect
to investments presenting an investment decision similar to that involved in
the Exchange Offer.  All representations, warranties and covenants contained
herein shall survive the Closing Date and all other transactions contemplated
by this Letter and the Prospectus. 

         In connection with the solicitation of written consents of Investors
in the Partnership, each Consenting Investor below hereby (i) represents and
warrants to Benton that he has full legal right, power and authority to execute
a written consent with respect to the Proposal and (ii) consents to the
adoption of the Proposal to amend the Partnership Agreement, as described in
the Prospectus.
<PAGE>   259
         The undersigned Investor hereby irrevocably appoints Benton or any
designee of Benton, with full power of substitution, as his true and lawful
attorney-in-fact, in his name, place and stead, to execute on behalf of the
Investor any additional documents necessary to consummate the Exchange and the
withdrawal and transfer of the assets underlying his Interest.  This power of
attorney shall become effective upon acceptance by Benton of his Interest,
shall be deemed coupled with an interest, shall be irrevocable (except in the
event of a withdrawal of a Consenting Investor's tender of his Interest
following a modification or amendment of the Exchange Offer), is granted in
consideration of the acceptance of his Interest, shall survive the death,
incapacity, dissolution or termination of the existence of the Investor and
shall be binding upon the Investor's heirs, legal representatives or assigns.



         The following information must be completed in order to entitle the
Soliciting Dealer to receive a fee in connection with the Exchange Offer.



                                       
                                        ----------------------------------------
                                                  Name of Soliciting Dealer
                                                       (Please Print)


                                       
                                        ----------------------------------------
                                                  Name of Account Executive
                                                       (Please Print)
                                     
                                     
                                       
                                        --------------------------------------- 
                                            City and State of Account Executive
<PAGE>   260
                                    PART IV

                                 ALL INVESTORS
           (EXCEPT NON-CONSENTING CALIFORNIA RESIDENTS.  SEE PART V)

         CALIFORNIA INVESTORS ELECTING TO EXERCISE DISSENTERS' RIGHTS SHOULD
INSTEAD COMPLETE PART V.

         Consent to the Proposal being submitted by Benton to adopt the
Amendment to the Partnership Agreement:

  [ ]     Tender and Consent                         [ ]     Withhold Consent

         CASH ELECTION

         Subject to the availability to elect a cash payment in lieu of Benton
Common Stock, I hereby elect to receive Cash rather than Benton Common Stock.
[ ]

                                 SIGNATURE BOX
           (NOT FOR NON-CONSENTING CALIFORNIA RESIDENTS.  SEE PART V)

Please sign exactly as you name is printed           When signing as a general
in Part I above, unless printed incorrectly.         partner, corporate
                                                     officer, attorney-in-fact,
                                                     executor, administrator,
                                                     trustee or guardian,    
                                                     please give full title and
                                                     send proper evidence of
                                                     authority with this
                                                     consent.  For joint
                                                     owners, each joint owner
                                                     must sign.

 ---------------------------------------------------
 Full Name of Investor
      (Please Print)

 ---------------------------------------------------
 Full Name of Co-owner, if any
      (Please Print)


 ---------------------------------------------------
 Signature of Investor
    (Please Print)


 ---------------------------------------------------
 Signature of Co-owner, if any
      (Please Print)
      
      Business Telephone: (     ) 
                           -----  ------------------------

      Home Telephone:     (     ) 
                           -----  ------------------------
      Dated                                          ,1995
            -----------------------------------------

IF THE INVESTOR FAILS TO INDICATE WHETHER CONSENT TO THE PROPOSAL IS GIVEN OR
WITHHELD, CONSENT WILL BE DEEMED TO BE GIVEN.
<PAGE>   261
                                     PART V

                      NON-CONSENTING CALIFORNIA INVESTORS

         COMPLETE ONLY IF YOU DO NOT WISH TO TENDER YOUR INTEREST PURSUANT TO
THE EXCHANGE OFFER AND WISH TO EXERCISE YOUR DISSENTERS' RIGHTS.

         The Non-consenting Investor signing in this Part V represents that
California is the Investor's state of residence and withholds his consent to 
the Proposal to approve and adopt the Amendment to the Program Agreement.  By
withholding consent, a Non-consenting California Investor will exercise his
dissenters' rights and will be deemed to have made the representations,
warranties and covenants (other than the consent to the adoption of the
Proposal) set forth in Part III above, and he will receive, pursuant to those
dissenters' rights, the number of shares of Common Stock equal to the Exchange
Value of his Interest divided by the average closing prices of the Units on
NASDAQ-NMS during the twenty trading days immediately after the Closing Date.

                                 SIGNATURE BOX
                 (ONLY FOR NON-CONSENTING CALIFORNIA RESIDENTS)

 Please sign exactly as  your name is 
 printed in Part I above, unless printed
 incorrectly.  When signing as general partner,  
 corporate officer, attorney-in-fact, executor,    ---------------------------- 
 administrator,  trustee or guardian, please give     Full Name of Investor  
 full title and send proper evidence of authority      (Please Print)
 with this consent.  For joint owner must sign. 
                                                   ----------------------------
                                                  Full Name of Co-owner, if any 
                                                           (Please Print)


                                                   -----------------------------
                                                        Signature of Investor
                                

                                                 
                                         ------------------------------
                                         Signature of Co-owner, if any

                                         Business Telephone:  (   )
                                                               --- ------------
                                         Home Telephone:      (   )
                                                               --- ------------

                                         Dated                            ,1995
                                              ----------------------------
<PAGE>   262
                                    PART VI


                                  INSTRUCTIONS


         1.  Previously Transferred Interests.  If an Investor has transferred,
whether by sale, gift, death or otherwise, the beneficial ownership of any
Interest of which he has been named a holder of record in the accompanying
Letter of Transmittal without previously notifying Benton or complying with the
procedures set forth in the Partnership Agreement for transferring his Interest
in the Partnership, he should notify Benton of that fact and identify the
Interest transferred, the date of transfer and the name, address and tax
identification number of the assignee.  Benton will then send the Investor and
the assignee revised Letters of Transmittal and request from the Investor or
assignee such other documents as it may require in order to facilitate the
tender, if desired, of an assignee's interest in the Partnership.

         2.  Participation in Exchange.  To be entitled to receive the Common
Stock and Warrants in the Exchange, even if consent to the Proposal is
withheld, an Investor must deliver one copy of the Letter of Transmittal,
completed, dated and signed in the Signature Box in Part IV or the Signature
Box in Part V for Non-consenting California residents.  Delivery is at the risk
of the Investor.  A tender will be effective only when the Letter is actually
received by the Exchange Agent.  The Letter must be received by the Exchange
Agent on or before 5:00 p.m. Eastern Time, on ________________ unless the
Exchange Offer is extended, in which event the Letter must be received by the
latest time and date on which the Exchange Offer, as so extended,
will expire.

         3.  Signatures.  The Letter must be signed by the Investor whose name
appears in Part I of the Letter.  If the Interest is held in the names of two
or more persons, all such persons must sign the Letter.  With respect to
Interests held by entities such as trusts, joint ventures, limited partnerships
or general partnerships, Benton may require that the Letter of Transmittal be
accompanied by evidence acceptable to Benton that the entity has met all
requirements of its governing instruments, such as applicable partnership or
joint venture agreements, and that the person signing the Letter is authorized
to sign for the Investor under the laws of the jurisdiction in which the entity
was organized. 

         TO PARTICIPATE IN THE EXCHANGE OFFER, AN INVESTOR MUST SIGN IN THE
SIGNATURE BLOCK IN PART IV (OR PART V FOR CALIFORNIA INVESTORS), EVEN IF HE
OBJECTS TO THE EXCHANGE OFFER AND ELECTS TO WITHHOLD HIS CONSENT TO THE
PROPOSAL.  INVESTORS WILL NOT RECEIVE UNITS IN THE EXCHANGE UNTIL A SIGNED
LETTER OF TRANSMITTAL IS RETURNED. 

         4.  Conditional Tenders.  No alternative, conditional or contingent
tenders will be accepted.

         5.  Withdrawal of Tenders.  Tenders of Interests and consents to the
Proposal are revocable at any time prior to the Expiration Date by delivering a
notice of withdrawal to Benton. 

         6.  Validity of Tenders.  All questions on the validity, form, 
eligibility (including time of receipt) and acceptance of Interests will be
determined by Benton, and its determination will be final and binding.
Interpretation by Benton of the terms and conditions of the Exchange Offer
(including the instructions to the Letter of Transmittal) will also be final
and binding.  Benton reserves the right to waive any irregularities or
conditions on the manner of tender, and the interpretation by Benton of the
terms and conditions of the Exchange Offer (including the instructions in the
Letter of Transmittal) shall be final and binding.  Any irregularities in
connection with tenders must be cured within such time as Benton shall
determine unless waived by it.
<PAGE>   263
         Tenders will be deemed not to have been made until any irregularities
have been cured or waived.  Any Letter of Transmittal which is not properly
completed and executed, and as to which irregularities are not cured or waived,
will be returned by Benton to the Investor as soon as practicable.  Benton is
under no duty to give notification of defects in tenders and will not incur any
liability for failure to give notification. 

         Benton will not accept tenders of less than all of an Investor's
Interest in the Partnership.

         7.  Consents to Proposal.  A tender of an Interest constitutes a
consent to the Proposal.  Only persons who are holders of record of Partnership
Interests on the date of the Prospectus may vote on the Proposal.

         8.  Dissenters' Rights for California Residents.  Investors residing
in California have limited dissenters' rights in accordance with the
requirements for rollup transactions.  By signing Part V and thereby
withholding consent to the Proposal, Investors in that State will be deemed to
exercise their dissenters' rights and will receive the number of Shares of
Common Stock equal to the Exchange Value of their Interests divided by the
average closing prices of the Units on NASDAQ-NMS during the twenty trading
days immediately after the Closing Date.  Each California Investor withholding
consent to the Proposal will also be deemed to have tendered his Interest for
that number of Units and therefore will not be required to separately submit an
executed Transfer Application.  If the average price of the Units during the
specified period after the Closing Date is lower than the Exchange Price,
dissenting California Investors will receive more for their Interests than they
would otherwise receive in the Exchange Offer.  Any increase in the market
price of the Common Stock during that period relative to the Exchange Price,
however, would reduce the number of shares that dissenting California Investors
will receive in the Exchange Offer.

         Although the rollup requirements for California residents entitle them
to an appraisal in rollup transactions involving their investments, Investors
residing in California who exercise these dissenters' rights will not be
entitled to a separate appraisal for their Interests because the Exchange Value
of the Common Stock determined by Benton exceeds the liquidation value assigned
to the Partnership's net assets in an independent appraisal already performed
in accordance with the Partnership Agreement.
<PAGE>   264
                                                                       EXHIBIT E

                         California Corporations Code

Section 25014.7. "Eligible rollup transaction"

        (a) "Eligible rollup transaction" means a rollup transaction in which 
the new securities issued are either listed or approved for listing on a 
national securities exchange or designated or approved for designation upon 
notice of issuance as a national market system security on an interdealer 
quotation system by the National Association of Securities Dealers, Inc., where 
the national securities exchange and the interdealer quotation system have been 
certified by the commissioner under subdivision (o) of Section 25100, if the 
exchange or association requires as a condition to listing or designation that 
the rollup transaction be conducted in accordance with procedures to protect
the rights of limited partners.

        (b) The rights of limited partners will be presumed to be protected if 
the rollup transaction provides for the right of dissenting limited partners:

        (1) To receive compensation for their limited partnership units based on
an appraisal of the limited partnership assets performed by an independent
appraiser unaffiliated with the sponsor or general partner of the limited
partnership and which value the assets as if sold in an orderly manner in a
reasonable period of time, plus or minus other balance sheet items, and less the
cost of sale or refinancing. Compensation to dissenting limited partners of
rollup transactions may be cash, secured debt instruments, unsecured debt
instruments, or freely tradeable securities; provided, however, that: 

        (A) Rollups which utilize debt instruments as compensation provide for 
a trustee and an indenture to protect the rights of the debt holders and 
provide a rate of interest based upon, but not less than, the then applicable 
federal rate as determined in accordance with Section 1274 of the Internal 
Revenue Code of 1986.

        (B) Rollups which utilize unsecured debt instruments as compensation, 
in addition to the requirements of subparagraph (A) of paragraph (1), limit 
total leverage to 70 percent of the appraised value of the assets.

        (C) All debt securities have a term no greater than seven years and 
provide for prepayment with 80 percent of the net proceeds of any sale or 
refinancing of the assets previously owned by the entity or any part thereof.

        (D) Freely tradeable securities utilized as compensation to dissenting 
limited partners must be issued by an issuer whose securities are listed on a
certified national securities exchange or designated as a national market 
system security on an interdealer quotation system by the National Association
of


<PAGE>   265

Securities Dealers, Inc., for at least one year prior to the transaction, and 
the number of securities to be received in return for limited partnership 
interests must be determined by an appraisal of limited partnership assets, 
conducted in a manner consistent with paragraph (1) of subdivision (b), in 
relation to the average last sale price of the freely tradeable securities in 
the 20-day period following the transaction. If the issuer of the freely 
tradeable securities is affiliated with the sponsor or general partner, newly 
issued securities to be utilized as compensation to dissenting limited partners 
shall not represent more than 20 percent of the issued and outstanding shares 
of that class of securities after giving effect to the issuance. For the 
purposes of the preceding sentence, a sponsor or general partner is 
"affiliated" with the issuer of the freely tradeable securities if the sponsor 
or general partner receives any material compensation from the issuer or its 
affiliates in conjunction with the rollup transaction or the purchase of the 
general partner's interest; provided, however, that nothing herein shall 
restrict the ability of a sponsor or general partner to receive any payment for 
its equity interests and compensation as otherwise provided by this section.

        (2)  To receive or retain a security with substantially the same terms 
and conditions as the security originally held, provided that the receipt or 
retention of that security is not a step in a series of subsequent transactions 
that directly or indirectly through acquisition or otherwise involves future 
combinations or reorganizations of one or more rollup participants. Securities 
received or retained will be considered to have the same terms and conditions 
as the security originally held if:

        (A)  There is no material adverse change to dissenting limited 
partners' rights, including, but not limited to, rights with respect to voting, 
the business plan, or the investment, distribution, management compensation and 
liquidation policies of the limited partnership or resulting entity.

        (B)  The dissenting limited partners receive the same preferences, 
privileges, and priorities as they had pursuant to the security originally held.

        The rights set forth in paragraphs (1) and (2) are the only rights of 
dissenting limited partners to which the presumption under subdivision (b) 
applies. A general partner or sponsor shall file an application for 
qualification pursuant to Section 25110 or Section 25120 with respect to any 
other rights proposed to be offered to dissenting limited partners.

        At the time a registration statement is filed with the Securities and 
Exchange Commission with respect to an eligible rollup transaction, a general 
partner or sponsor shall notify, to the maximum extent permitted by the federal 
securities laws, each limited partner who has an address in this state by 
certified mail of the following: That a registration statement has been filed 
with the Securities and Exchange Commission with respect to a rollup 
transaction; that the general partner or sponsor claims an exemption from the 
review process under the law by virtue of Section 25014.7, which defines 
"eligible rollup transaction"; that the general partner or sponsor has the 
burden of proof under the law that the transaction meets the definition of 
eligible rollup transaction; and that the commissioner does not recommend or 
endorse the transaction.

        (c)  The rights of limited partners shall be presumed not to be 
protected if the general partner:

<PAGE>   266

        (1)  Converts an equity interest in the limited partnerships subject to 
a rollup for which consideration was not paid and which was not otherwise 
provided for in the limited partnership agreement and disclosed to limited 
partners, into a voting interest in the new entity, provided, however, an 
interest originally obtained in order to comply with the provisions of Internal 
Revenue Service Revenue Proclamation 89-12 may be converted.

        (2)  Fails to follow the valuation provisions in the limited 
partnership agreements of the subject limited partners when valuing their 
limited partnership interests.

        (3)  Utilizes a future value of their equity interest rather than the 
current value of their equity interest, as determined by an appraisal conducted 
in a manner consistent with paragraph (1) of subdivision (b), when determining 
their interest in the new entity.

        (d)  The rights of limited partners shall be presumed not to be 
protected as to voting rights, if:

        (1)  The voting rights in the entity resulting from a rollup do not 
generally follow the original voting rights of the limited partnerships 
participating in the rollup transaction.

        (2)  A majority of the interest in an entity resulting from a rollup 
transaction may not, without concurrence by the sponsor, general partners, 
board of directors or trustee, depending on the form of entity, vote to:

        (A)  Amend the limited partnership agreement, articles of incorporation 
or bylaws, or indenture.

        (B)  Dissolve the entity.

        (C)  Remove management and elect new management.

        (D)  Approve or disapprove the sale of substantially all of the assets 
of the entity.

        (3)  The general partner or sponsor proposing a rollup is not required 
to provide each person whose equity interest is subject to the rollup 
transaction with a document which instructs the person on the proper procedure 
for voting against or dissenting from the rollup transaction.

        (4)  The general partner or sponsor does not utilize an independent 
third party to receive and tabulate all votes and dissents, and require that 
the third party make the tabulation available to the general partner and any 
limited partner upon request at any time during and after voting occurs.

        (e)  The rights of limited partners shall be presumed not to be 
protected as to transaction costs if:

        (1)  Limited partners bear an unfair portion of the transaction costs 
of a proposed rollup transaction that is rejected. For purposes of this 
provision, transaction costs are defined as the costs of printing and mailing 
the proxy, prospectus, or other documents; legal fees not related to the 
solicitation of votes or tenders; financial advisory fees; investment banking 
fees; appraisal

<PAGE>   267


fees; accounting fees; independent committee expenses; travel expenses; and all 
other fees related to the preparatory work of the transaction, but not 
including costs that would have otherwise been incurred by the subject limited 
partnerships in the ordinary course of business, or solicitation expenses.

        (2) Transaction costs of a rejected rollup transaction are not 
apportioned between general and limited partners of the subject limited 
partnerships according to the final vote on the proposed transaction as follows:

        (A) The general partner or sponsor bears all rollup transaction costs 
in proportion to the number of votes to reject the rollup transaction.

        (B) Limited partners bear transactions costs in proportion to the 
number of votes to approve the rollup transaction.

        (3) The dissenting limited partnership is required to pay any of the 
costs of the rollup transaction and the general partner or sponsor is not 
required to pay the rollup transaction costs on behalf of the dissenting 
limited partnerships in a rollup in which one or more limited partnerships 
determines not to approve the transaction, but where the rollup transaction is 
consummated with respect to one or more approving limited partnerships.

        (f) The rights of limited partners shall be presumed not to be 
protected as to fees of general partners and sponsors, if:

        (1) General partners and sponsors are not prevented from receiving both 
unearned management fees discounted to a present value, if those fees were not 
previously provided for in the limited partnership agreement and disclosed to 
limited partners, and new asset-based fees.

        (2) Property management fees and other management fees are not 
appropriate, not reasonable and greater than what would be paid to third 
parties for performing similar services.

        (3) Changes in fees which are substantial and adverse to limited 
partners are not approved by an independent committee according to the facts 
and circumstances of each transaction.

        (g) A general partner or sponsor proposing a rollup transaction shall 
pay all solicitation expenses related to the transaction, including all 
preparatory work related thereto, in the event the rollup transaction is not 
approved. For purposes of this section, "solicitation expenses" include direct 
marketing expenses such as telephone calls, broker-dealer fact sheets, legal 
and other fees related to the solicitation, as well as direct solicitation 
compensation to brokers and dealers.

        (h) A broker or dealer may not receive compensation for soliciting 
votes or tenders from limited partners in connection with a rollup transaction 
unless that compensation:

        (1) Is payable and equal in amount regardless of whether the limited 
partner votes affirmatively or negatively in the proposed rollup.

        (2) In the aggregate, does not exceed 2 percent of the exchange value 
of the newly created securities.
<PAGE>   268

        (3)    Is paid regardless of whether the limited partners reject the
proposed rollup transaction.
 
        (i)     As used in this section, the following terms have the following
meanings:

        (1)     "Limited partnership" includes any entity determined to be a
"partnership" pursuant to Section 14((h) (4) (B) of the Securities Exchange Act
of 1934 or such other entity having a substantially economically equivalent
form of ownership instrument.

        (2)     "Dissenting limited partner" means a holder or a beneficial
interest in a limited partnership that is the subject of a rollup transaction
who casts a vote against the rollup transaction, except that for purposes of an
exchange or tender offer dissenting limited partner means any person who files
a dissent from the terms of the transaction with the party responsible for
tabulating the votes or tenders, to be received in connection with the
transaction during the period in which the offer is outstanding.

        (3)     "Management fee" means a fee paid to the sponsor, general
partner, their affiliates, or other persons for management and administration
of the limited partnership.

 
<PAGE>   269

                                     PART II

ITEM 20.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

        Under provisions of the Certificate of Incorporation and Bylaws of the
Company, each person who is or was a director or officer of the Company shall be
indemnified by the Company as a matter of right to the full extent permitted or
authorized by law. The effects of the Certificate of Incorporation, Bylaws and
General Corporation Law of Delaware may be summarized as follows:

                (a) Under Delaware law, to the extent that such a person is
        successful on the merits in defense of a suit or proceeding brought
        against him by reason of the fact that he is a director or officer of
        the Company, he shall be indemnified against expenses (including
        attorneys' fees) reasonably incurred in connection with such action.

                (b) If unsuccessful in defense of a third-party civil suit or a
        criminal suit, or if such a suit is settled, such a person shall be
        indemnified under such law against both (1) expenses (including
        attorneys' fees) and (2) judgments, fines and amounts paid in settlement
        if he acted in good faith and in a manner he reasonably believed to be
        in, or not opposed to, the best interests of the Company, and with
        respect to any criminal action, had no reasonable cause to believe his
        conduct was unlawful.

                (c) If unsuccessful in defense of a suit brought by or in the
        right of the Company, or if such suit is settled, such a person shall be
        indemnified under such law only against expenses (including attorneys'
        fees) incurred in the defense or settlement of such suit if he acted in
        good faith and in a manner he reasonably believed to be in, or not
        opposed to, the best interests of the Company except that if such a
        person is adjudged to be liable in a suit in the performance of his duty
        to the Company, he cannot be made whole even for expenses unless the
        court determines that he is fairly and reasonably entitled to indemnity
        for such expenses.

                (d) The Company may not indemnify a person in respect of a
        proceeding described in (b) or (c) above unless it is determined that
        indemnification is permissible because the person has met the prescribed
        standard of conduct by any one of the following: (i) the Board of
        Directors, by a majority vote of a quorum consisting of directors not at
        the time parties to the proceeding, (ii) if a quorum of directors not
        parties to the proceeding cannot be obtained, or, if obtainable but the
        quorum so directs, by independent legal counsel selected by the Board of
        Directors or the committee thereof; or (iii) by the stockholders.

ITEM 21.  EXHIBITS AND FINANCIAL STATEMENT SCHEDULES.

        (a)     Exhibits.

                1.1      Form of Soliciting Agent Agreement.*

   
                2.1      Asset Purchase Agreement between Benton Oil & Gas
                         Combination Partnership 1989-1, L.P. and Goldking
                         Trinity Bay Corp. dated June 30, 1995.

                2.2      Asset Purchase Agreement between Benton Oil & Gas
                         Combination Partnership 1990-1, L.P. and Goldking
                         Trinity Bay Corp. dated June 30, 1995.

                2.3      Asset Purchase Agreement between Benton Oil & Gas
                         Combination Partnership 1991-1, L.P. and Goldking
                         Trinity Bay Corp. dated June 30, 1995.
    

                                      II-1
<PAGE>   270

                4.1      Form of Stock Certificate (incorporated by reference to
                         Exhibit 4.1 to the Company's Form S-1 Registration
                         Statement, Registration No. 33-26333).
   

                4.2      Benton Oil & Gas Combination Partnership 1989-1, L.P.
                         Limited Partnership Agreement dated July 31, 1989.*

                4.3      Benton Oil & Gas Combination Partnership 1990-1, L.P.
                         Limited Partnership Agreement dated May 15, 1990.*

                4.4      Benton Oil & Gas Combination Partnership 1991-1, L.P.
                         Limited Partnership Agreement dated July 29, 1991.*

                5.1      Opinion of Emens, Kegler, Brown, Hill & Ritter Co., LPA
                         as to the legality of the securities being registered.

                8.1      Opinion of Emens, Kegler, Brown, Hill & Ritter Co.,
                         L.P.A. as to tax matters.
    

                11.1     Statement regarding computation of per share earnings
                         (incorporated by reference to Exhibit 11.1 to the
                         Company's 10-K for the year ended December 31, 1994 and
                         to Exhibit 11.1 to the Company's Form 10-Q for the
                         quarter ended March 31, 1995).

                23.1     Consent of Deloitte & Touche LLP.
   

                23.2     Consent of Emens, Kegler, Brown, Hill & Ritter Co.,
                         LPA. (Included in Exhibits 5.1 and 8.1)
    

                23.3     Consents of Huddleston & Co., Inc.

                24.1     Power of Attorney (included on signature page).
   

                24.2     Power of Attorney of the Company.*
    

- ---------------
   
*       Filed previously as an exhibit to this Registration Statement No. 
        33-61299.
    

        (b)     Financial Statement Schedules.

                All schedules have been omitted because the required information
                is not significant or included in the financial statements or
                the notes thereto, or is not applicable.

ITEM 22.  UNDERTAKINGS.

        a.      The undersigned registrant hereby undertakes:

                (1)   To file, during any period in which offers or sales are
                      being made, a post-effective amendment to this
                      registration statement:

                      (i)  To include any prospectus required by Section
                           10(a)(3) of the Securities Act of 1993;

                      (ii) To reflect in the prospectus any facts or events
                           arising after the effective date of the registration
                           statement (or the most recent post-effective
                           amendment thereof) which, individually or in the
                           aggregate, represents a fundamental change in the
                           information set forth in the registration statement;

                      (iii) To include any material information with respect to
                           the plan of distribution not previously disclosed in
                           the registration statement or any material change to
                           such information in the registration statement;

                                      II-2
<PAGE>   271

                (2)   That, for the purpose of determining any liability under
                      the Securities Act of 1933, each such post-effective
                      amendment shall be deemed to be a new registration
                      statement relating to the securities offered therein and
                      the offering of such securities at that time shall be
                      deemed to be the initial bona fide offering thereof.

                (3)   To remove from registration by means of a post-effective
                      amendment any of the securities being registered which
                      remain unsold at the termination of the offering.

                (4)   If the registrant is a foreign private issuer, to file a
                      post-effective amendment to the registration statement to
                      include any financial statements required by section
                      210.3-19 of this chapter at the start of any delayed
                      offering of throughout a continuous offering. Financial
                      statements and information otherwise required by Section
                      10(a)(3) of the Act need not be furnished, provided that
                      the registrant includes in the prospectus, by means of a
                      post-effective amendment, financial statements required
                      pursuant to this paragraph (a)(4) and other information
                      necessary to ensure that all other information in the
                      prospectus is at least as current as the date of those
                      financial statements.
   

        b.      The undersigned registrant hereby undertakes that, for purposes
                of determining any liability under the Securities Act of 1933,
                each filing of the registrant's annual report pursuant to
                Section 13(a) or Section 15(d) of the Securities Exchange Act of
                1934 (and, where applicable, each filing of an employee benefit
                plans' annual report pursuant to Section 15(d) of the Securities
                Exchange Act of 1934) that is incorporated by reference in the
                Registration Statement shall be deemed to be a new registration
                statement relating to the securities offered therein, and the
                offering of such securities at that time shall be deemed to be
                the initial bona fide offering thereof.

        c.      The undersigned registrant hereby undertakes to respond to
                requests for information that is incorporated by reference into
                the prospectus pursuant to Items 4, 10(b), 11, or 13 of this
                Form, within one business day of receipt of such request and to
                send the incorporated documents by first class mail or other
                equally prompt means. This includes information contained in
                documents filed subsequent to the effective date of the
                registration statement through the date of responding to the
                request.

        d.      The undersigned registrant hereby undertakes to supply by means
                of a post-effective amendment all information concerning a
                transaction and the company being acquired involved therein,
                that was not the subject of and included in the registration
                statement when it became effective.

        e.      Insofar as indemnification for liabilities arising under the
                Securities Act of 1933 may be permitted to directors, officers
                and controlling persons of the registrant pursuant to the
                foregoing provisions, or otherwise, the Registrant has been
                advised that in the opinion of the Securities and Exchange
                Commission such indemnification is against public policy as
                expressed in the Act and is, therefore, unenforceable. In the
                event that a claim for indemnification against such liabilities
                (other than the payment by the registrant of expenses incurred
                or paid by a director, offer or controlling person of the
                registrant in the successful defense of any action, suit or
                proceeding) is asserted by such director, officer or controlling
                person in connection with the securities being registered, the
                registrant will, unless in the opinion of its counsel the matter
                has been settled by controlling 
    

                                      II-3
<PAGE>   272

                precedent, submit to a court of appropriate jurisdiction the
                question whether such indemnification by it is against public
                policy as expressed in the Act and will be governed by the final
                adjudication of such issue.

                                      II-4
<PAGE>   273

                                   SIGNATURES

        Pursuant to the requirements of the Securities Act of 1933, as amended,
the Registrant has duly caused this Amendment No. 1 to the Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Carpinteria, State of California, on the 29th day of
September, 1995.

                                                BENTON OIL AND GAS COMPANY


                                                By:  /s/ A. E. Benton
                                                   -------------------------
                                                     A. E. Benton, President

        Pursuant to the requirements of the Securities Act of 1933, as amended,
this Registration Statement has been signed on September 29th, 1995 by the
following persons in the capacities indicated:

<TABLE>
<S>                              <C>
/s/ A. E. Benton                 President, Chief Executive Officer and Director
- ------------------------------
A.E. Benton

/s/ David H. Pratt*              Vice President -- Finance, Principal Financial Officer
- ------------------------------
David H. Pratt

/s/Chris C. Hickok*              Principal Accounting Officer
- ------------------------------
Chris C. Hickok

/s/ Michael B. Wray*             Director
- ------------------------------
Michael B. Wray

/s/ William H. Gumma*            Director
- ------------------------------
William H. Gumma

/s/ Richard W. Fetzner*          Director
- ------------------------------
Richard W. Fetzner

/s/ Bruce M. McIntyre*           Director
- ------------------------------
Bruce M. McIntyre

*Signed pursuant to a Power of Attorney

/s/ A. E. Benton
- ------------------------------
A. E. Benton, Attorney-In-Fact
</TABLE>

                                      II-5
<PAGE>   274
PROSPECTUS SUPPLEMENT
1989-1 PARTNERSHIP

                              SUBJECT TO COMPLETION
                              DATED OCTOBER 3, 1995



                                 EXCHANGE OFFER
                OF AN AGGREGATE OF 30,154 SHARES OF COMMON STOCK
      AND WARRANTS TO PURCHASE AN AGGREGATE OF 9,863 SHARES OF COMMON STOCK
                            FOR PARTNERSHIP UNITS IN
              BENTON OIL & GAS COMBINATION PARTNERSHIP 1989-1, L.P.
                          (281.8182 PARTNERSHIP UNITS)

                                 ---------------
                                 EXCHANGE RATIO:

     107 SHARES OF COMMON STOCK AND 35 WARRANTS PER 1989-1 PARTNERSHIP UNIT

         This Supplement accompanies a Prospectus (the "Prospectus") and is
being furnished to the Investors ("Investors") in the Benton Oil & Gas
Combination Partnership 1989-1, L.P., a California limited partnership (the
"Partnership") in connection with the offer by Benton Oil and Gas Company, a
Delaware corporation and the managing general partner of the Partnership
("Benton," or "Company," or "Managing General Partner") to exchange shares of
Common Stock, $.01 par value of Benton ("Common Stock") and Warrants
("Warrants") to purchase shares of Common Stock of Benton (the "Exchange Offer")
for all of the right, title and interest to units of Partnership interest in the
Partnerships ("Partnership Units") held by Investors, at the exchange rate
outlined below. Benton has offered to exchange shares of Common Stock and
Warrants for all of the right, title and interest to units of partnership
interest in the Benton Oil & Gas Combination Partnership 1990-1, L.P. (the
"1990-1 Partnership") and the Benton Oil & Gas Combination Partnership 1991-1,
L.P. (the "1991-1 Partnership") on the terms and at the exchange rates set forth
in the Prospectus. A separate supplement has been prepared for each of the
Partnerships. THE EFFECTS OF THE EXCHANGE OFFER MAY BE DIFFERENT FOR INVESTORS
IN THE VARIOUS PARTNERSHIPS. UPON RECEIPT OF A WRITTEN REQUEST BY AN INVESTOR OR
HIS REPRESENTATIVE WHO HAS BEEN DESIGNATED IN WRITING, A COPY OF ANY SUPPLEMENT
WILL BE TRANSMITTED PROMPTLY, WITHOUT CHARGE, BY BENTON. ANY SUCH REQUEST SHOULD
BE FORWARDED TO THE ATTENTION OF TONI L. JACKSON, BENTON OIL AND GAS COMPANY,
1145 EUGENIA PLACE, SUITE 200, CARPENTERIA, CALIFORNIA 93013.

         Benton is offering to exchange shares of Common Stock and Warrants to
owners of Partnership Units in the 1989-1 Partnership (the "1989-1 Units") on
the basis of $5,000.00 original investment on the terms and in the amounts set
forth herein. The Warrants to be issued in connection with the Exchange Offer
are exercisable at a price of $11.00 per share and will expire three years form
the date of issuance. For detailed information regarding the determination of
the Total Exchange Values for each of the Partnerships, see "Determination of
Exchange Value." On


<PAGE>   275

October 2, 1995, the last reported sales price of the Common Stock, as reported
on NASDAQ National Market, was $11.13.

         In connection with the Exchange Offer, Benton is submitting a Proposal
to Investors in the Partnership to amend the Partnership Agreement to provide
for the transfer of all of the assets and liabilities of the Partnership to
Benton as of the December 31, 1994 Effective Date in exchange for Common Stock
and Warrants in the amounts set forth herein and the pro rata distribution of
such consideration in liquidation of the Partnership. Each Investor who tenders
his Partnership Units pursuant to the Exchange Offer will, by that tender,
consent to the Proposal.

         ADOPTION OF THE PROPOSAL REQUIRES THE CONSENT OF INVESTORS OF THE
PARTNERSHIP HOLDING 75% OF THE PARTNERSHIP UNITS. IF INVESTORS IN THE
PARTNERSHIP HOLDING NOT LESS THAN 75% OF THE PARTNERSHIP UNITS ACCEPT THE
EXCHANGE OFFER AND CONSENT TO THE PROPOSAL, ALL NON-DISSENTING HOLDERS OF UNITS
IN THE PARTNERSHIP WILL BE BOUND BY THE TERMS OF THE EXCHANGE AND PROPOSAL AND
WILL RECEIVE THE NUMBER OF SHARES OF COMMON STOCK AND WARRANTS DESCRIBED HEREIN.
A SIMILAR EXCHANGE OFFER AND PROPOSAL IS BEING OFFERED TO INVESTORS IN TWO OTHER
PARTNERSHIPS. EACH OF THE EXCHANGE OFFERS TO THE PARTNERSHIPS IS INDEPENDENT OF
THE EXCHANGE OFFER TO THE OTHER PARTNERSHIPS. THE EXCHANGE WILL ONLY BE
CONSUMMATED FOR THE PARTNERSHIP IF THE PROPOSAL HAS BEEN APPROVED BY THE
INVESTORS. BENTON OIL AND GAS COMPANY, IN ADDITION TO BEING MANAGING GENERAL
PARTNER OF THE THREE PARTNERSHIPS, OWNS 2.8182 1989-1 UNITS AND WILL VOTE SUCH
UNITS THE SAME AS A MAJORITY OF INVESTORS VOTE THEIR UNITS. INVESTORS WILL
RECEIVE THE CONSIDERATION SET FORTH HEREIN, AND THE RESPECTIVE PARTNERSHIP WILL
BE DISSOLVED.

         ASSUMING CONSUMMATION OF THE EXCHANGE OFFER, ALL OF THE INVESTORS IN
THE PARTNERSHIP, WHETHER OR NOT THEY TENDER THEIR UNITS AND THUS VOTE IN FAVOR
OF THE PROPOSAL, WILL RECEIVE THE SAME NUMBER OF SHARES OF COMMON STOCK AND
WARRANTS AS THEY WOULD HAVE RECEIVED HAD THEY TENDERED THEIR PARTNERSHIP UNITS
AND THE PARTNERSHIP WILL BE DISSOLVED.

         THE EXCHANGE OFFER INVOLVES VARIOUS RISKS THAT SHOULD BE CONSIDERED BY
INVESTORS. SEE "RISK FACTORS AND MATERIAL CONSIDERATIONS," BEGINNING ON PAGE 4
OF THIS SUPPLEMENT. IN PARTICULAR, INVESTORS SHOULD CONSIDER THE FOLLOWING
FACTORS:
         -     INVESTORS HAD RECEIVED CASH DISTRIBUTIONS FROM THE PARTNERSHIP,
               BUT WILL RECEIVE NO CASH DISTRIBUTIONS OR DIVIDENDS IN THE
               FORESEEABLE FUTURE FROM BENTON.
         -     THE MARKET PRICE OF THE COMMON STOCK COULD DECLINE BELOW THE
               MARKET PRICE USED FOR CALCULATION OF THE EXCHANGE RATES, EXPOSING
               INVESTORS TO A REDUCED RETURN ON THEIR INVESTMENT.
         -     THE EXCHANGE VALUE OF THE PARTNERSHIP UNITS WAS DETERMINED BY
               BENTON, WHICH HAS INHERENT CONFLICTS OF INTEREST, AND MAY NOT
               REFLECT THE VALUE OF THE NET ASSETS OF THE PARTNERSHIP IF SOLD TO
               AN UNAFFILIATED THIRD PARTY IN AN ARM'S LENGTH TRANSACTION.
         -     BENTON HAS ATTRIBUTED A PRESENT VALUE TO THE WARRANTS, USING THE
               BLACK-SCHOLES OPTION PRICING MODEL. HOWEVER, THE ACTUAL VALUE, IF
               ANY, A HOLDER MAY REALIZE FROM THE WARRANTS WILL DEPEND ON THE
               EXCESS OF THE MARKET PRICE OF THE 


                                       2

<PAGE>   276


               COMMON STOCK OVER THE EXERCISE PRICE OF THE WARRANT ON THE DATE 
               THE WARRANT IS EXERCISED.
         -     BENTON'S DETERMINATIONS OF THE EXCHANGE VALUES WERE BASED
               PRIMARILY ON THE ESTIMATED PRESENT VALUE OF THE PARTNERSHIP'S
               PROVED OIL AND GAS RESERVES, WHICH INVOLVES MANY UNCERTAINTIES
               AND COULD RESULT IN AN UNDERVALUATION OF PARTNERSHIP UNITS.
               ALTHOUGH SUPPORTED BY AN INDEPENDENT OFFER FOR THE PURCHASE OF
               SUBSTANTIALLY ALL OF THE ASSETS OF THE PARTNERSHIP, THERE CAN BE
               NO ASSURANCE THAT THE EXCHANGE VALUE REPRESENTS THE VALUE THE
               PARTNERSHIP COULD RECEIVE IN THE SALE OF THE ASSETS OF THE
               PARTNERSHIP.
         -     THE ALTERNATIVES OF CONTINUING THE PARTNERSHIP OR LIQUIDATING ITS
               ASSETS COULD POTENTIALLY BE MORE BENEFICIAL TO INVESTORS THAN THE
               EXCHANGE OFFER.
         -     NO INDEPENDENT REPRESENTATIVE WAS ENGAGED TO REPRESENT THE
               UNAFFILIATED INVESTORS IN NEGOTIATING THE TERMS OF THE EXCHANGE
               OFFER, WHICH MAY BE INFERIOR TO THOSE THAT COULD HAVE BEEN
               NEGOTIATED BY AN INDEPENDENT REPRESENTATIVE.
         -     INVESTORS HAVE NO DISSENTER'S RIGHTS IN THE EXCHANGE OFFER, OTHER
               THAN LIMITED DISSENTERS' RIGHTS FOR CALIFORNIA RESIDENTS, AND
               THEREFORE CANNOT ELECT TO RECEIVE CASH FOR THEIR PARTNERSHIP
               UNITS.
         -     OWNERSHIP OF COMMON STOCK MAY INVOLVE GREATER RISK THAN AN
               INVESTMENT IN THE PARTNERSHIP UNITS BECAUSE OF BENTON'S BROADER
               OPERATIONS, INCLUDING FOREIGN OPERATIONS, AND ITS USE OF DEBT TO
               FINANCE ONGOING OPERATIONS.
         -     FUTURE EQUITY OFFERINGS BY BENTON COULD POTENTIALLY BE DILUTIVE
               TO INVESTORS HOLDING COMMON STOCK OR WARRANTS.

         The Exchange may be withdrawn at any time prior to its scheduled
expiration date if Benton reasonably determines that a material change affecting
the Partnership or the Company has occurred. THE EXCHANGE WILL ONLY BE
CONSUMMATED IF THE PROPOSAL HAS BEEN APPROVED BY THE INVESTORS. The assets and
liabilities of the Partnership, if the Proposal is approved and the Exchange
Offer is accepted, will be transferred to Benton effective as of December 31,
1994 (the "Effective Date").

THE EXCHANGE OFFER EXPIRES AT 5:00 P.M. PACIFIC TIME ON             , 1995
UNLESS EXTENDED.

             ------------------------------------------------------
THE SHARES OF COMMON STOCK AND WARRANTS TO BE ISSUED IN CONNECTION WITH THE
EXCHANGE HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND EXCHANGE
COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE ACCURACY
OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL
OFFENSE.

               THE DATE OF THIS SUPPLEMENT IS             , 1995.


                                       3

<PAGE>   277


The information contained in this Supplement is being provided to Investors in
the Benton Oil & Gas Combination Partnership 1989-1, L.P. (the "Partnership").
The information contained in this Supplement is not intended to be a complete
description of all matters covered in the Prospectus, and Investors are
encouraged to review all information set forth in the Prospectus.

                    RISK FACTORS AND MATERIAL CONSIDERATIONS

         The Exchange Offer. In addition to the information included in this
Supplement and the Prospectus, the Investors should carefully consider the
following factors in determining whether to accept the Exchange Offer and
consent to the Proposal. The risk factors summarized below are described in
further detail elsewhere in the Prospectus at "Risk Factors and Material
Considerations," beginning at page 34.

         Lack of Arm's Length Negotiations and Uncertainties in the Method of
         Determining Exchange Values. The Exchange Value was determined by
         Benton, based in part on an offer for the purchase of substantially all
         of the assets of the Partnership from an unaffiliated third party, but
         may not reflect the actual value of the net assets of the Partnership.
         The primary assets of the Partnership considered by Benton when
         determining the Exchange Value were the proved oil and gas reserves of
         the Partnership (the "Proved Reserves") and the present value of
         associated future net cash flow as of December 31, 1994, as well as the
         offer to purchase the Umbrella Point Field by Goldking, described
         herein and in the Prospectus. There are many uncertainties inherent in
         estimating quantities of Proved Reserves, and the present value
         attributed to the Partnership's Proved Reserves may be less than the
         discounted future net cash flows actually received from the
         Partnership's interest in its wells. In that event, the use of this
         valuation methodology will have resulted in an undervaluation of the
         Partnership Units. See "Recommendation of the Managing General Partner"
         in the Prospectus. 

         Potential Decline in Market Price of Common Stock. Access to an active
         trading market by exchanging Investors may result in a relatively large
         number of shares of Common Stock offered for sale immediately after the
         Closing Date. This may tend to lower the market price for the Common
         Stock. Future market conditions in the oil and gas industry in general
         or the effect of the conditions on Benton in particular could also
         adversely affect the market price of the Common Stock and thus the
         value of the Warrants. There can be no assurance regarding the
         potential appreciation in the market price of the Common Stock. Any
         decline in the market price of the Common Stock could reduce the
         Investor's return on investment or increase the loss on the Investor's
         original investment.

         Potential Benefits of Alternatives to the Exchange. The alternatives to
         the Exchange Offer are the continuation of the Partnership or the
         liquidation of the Partnership's assets and distribution of the
         liquidation proceeds to Investors, either of which could potentially be


                                       4


<PAGE>   278

         more beneficial to Investors than the Exchange by avoiding the risks
         associated with ownership of Benton Common Stock and, in the case of a
         liquidation of the Partnership, by providing an immediate cash return
         to Investors. See "Recommendation of the Managing General
         Partner--Managing General Partner's Determination that Exchange Offer
         is Fair--Alternatives to the Exchange" contained in the Prospectus.

         Lack of Independent Representatives for Investors; No Fairness Opinion.
         No independent representative was selected or hired to represent the
         interests of the Investors in negotiating the terms of the Exchange
         Offer. The Exchange Values and other terms of the Exchange Offer may
         therefore be inferior to those that could have been negotiated by an
         independent representative. Benton did not retain an independent third
         party to render an opinion regarding the fairness of the terms of the
         Exchange Offer to the Investors.

         Limited Dissenters' Rights. Investors who are California residents and
         who oppose the Proposal will have limited dissenters' rights. Other
         Investors who oppose the Proposal will have no dissenters' rights or
         appraisal rights, and therefore, no option to receive cash based on a
         separate appraisal of the Partnership assets in lieu of the Common
         Stock and Warrants based on the Exchange Values determined by Benton.
         The Managing General Partner could have provided all Investors with
         appraisal rights in structuring the Exchange Offer but elected not to
         do so, primarily because such rights are not provided for in the
         Partnership Agreements. The absence of these rights limit the options
         that would otherwise be available to Investors opposing the Exchange
         Offer.

         Effect of Dissenters' Rights on California Investors. Investors
         residing in California will be afforded limited dissenters' rights in
         accordance with the requirements for roll-up transactions under the
         California Code. By voting against the Proposal, Investors in the State
         of California will be deemed to exercise their dissenters' rights and
         will receive the number of shares of Common Stock and Warrants equal to
         the Exchange Value of their interests divided by the closing price of
         the Common Stock on the NASDAQ-National Market during the twenty days
         immediately after the Closing Date. If that average price is lower than
         the Exchange Price, dissenting California Investors will receive more
         shares of Common Stock than they would otherwise receive in the
         Exchange Offer. If, however, the average price is higher than the
         Exchange Price, dissenting California Investors will receive fewer
         shares of Common Stock and Warrants. California Investors hold a
         substantial portion of the interests in the Partnership, and the impact
         of the exercise of dissenters' rights could materially increase the
         number of shares of Common Stock issued by Benton in connection with
         the Exchange Offer.

         Conflicts of Interest of Benton. Benton is the Managing General Partner
         of the Partnership and its determination of the Exchange Value involves
         an inherent conflict of interest. As Managing General Partner, Benton
         owes fiduciary duties to the Investors in the Partnership. In addition,
         it owes a duty to its stockholders. While Benton believes that it has
         fulfilled these obligations in its determination of the Exchange Value,
         which is supported, in part, by a reserve report audited by an
         independent petroleum engineer, no degree of objectivity or
         professional competence can eliminate the inherent conflict of



                                       5

<PAGE>   279

         interest. See "Recommendation of the Managing General
         Partner--Fiduciary Duties of Benton" contained in the Prospectus.

         Benton Dividend Policy. Benton's policy is to retain its earnings to
         support the growth of Benton's business. Accordingly, the Board of
         Directors of Benton has never declared cash dividends on its Common
         Stock and does not plan to do so in the foreseeable future.
         Furthermore, the terms of Benton's debt agreements prohibit Benton from
         paying cash dividends on its Common Stock. Thus, upon consummation of
         the Exchange, Investors will no longer receive cash distributions and
         it is unlikely that cash dividends will be paid on the Benton Common
         Stock at any time in the foreseeable future.

         No Fractional Shares. No fractional shares will be issued in connection
         with the Exchange Offer. An Investor who would otherwise be entitled to
         a fractional share of Common Stock will be paid cash in lieu of such
         fractional shares. Warrants issued in connection with the Exchange
         Offer will be rounded to the nearest whole number of Warrants and no
         fractional interest will be issued.

         Risks Associated with Ownership of Common Stock of Benton. In addition
to the information included in this Supplement and the Prospectus, the Investors
should carefully consider the following factors related to Benton in determining
whether to accept the Exchange Offer. The risk factors summarized below are
described in further detail in the Prospectus at "Risk Factors and Material
Considerations."

         Losses From Benton's Operations. The historical financial data for
         Benton reflects net losses and decreased revenues for the years ended
         December 31, 1992 and 1993. Benton's ability to maintain its financing
         arrangements, produce its oil and gas reserves and service its debt
         obligations would be adversely affected by a lack of profitability.

         Foreign Operations. Almost all of Benton's oil and gas revenues and
         Proved Reserves are attributable to its operations in Venezuela and
         Russia. Benton's Venezuelan and Russian operations are subject to
         political, economic and other uncertainties inherent in the development
         of foreign properties.

         Properties Under Development. A substantial amount of Benton's Proved
         Reserves are undeveloped and require development activities and/or are
         proved developed behind-pipe or shut-in and require additional
         development activities. As a result, Benton will require substantial
         capital expenditures to develop all of its Proved Reserves.

         Engineers' Estimates of Reserves and Future Net Revenue. This
         Prospectus contains, and incorporates by reference, estimates of
         Benton's and the Partnerships' oil and gas reserves and future net
         revenues therefrom. Estimates of commercially recoverable oil and gas
         and the future net cash flows derived therefrom are based upon a number
         of variable factors and assumptions. Estimates to some degree are
         speculative and estimates of the commercially recoverable reserves of
         oil and natural gas, and the future net cash flows therefrom, prepared
         by different engineers or by the same engineer at different times, may



                                       6


<PAGE>   280

         vary substantially. The difficulty of making precise estimates is
         accentuated because most of Benton's Proved Reserves were non-producing
         at December 31, 1994.

         Development of Additional Reserves. Benton's future success may also
         depend upon its ability to find or acquire additional oil and gas
         reserves that are economically recoverable. There can be no assurance
         that Benton will be able to discover additional commercial quantities
         of oil and gas, or that Benton will be able to continue to acquire
         interests in underdeveloped oil and gas fields and enhance production
         and reserves therefrom.

         Partnership Litigation. Certain limited partners in Benton's oil and
         gas limited partnerships, including the Partnerships that are the
         subject of this Exchange Offer, filed suit against Benton and others
         alleging breaches of contract, fiduciary duty and fraud. This suit has
         been voluntarily dismissed, subject to an agreement among the parties
         to arbitrate the issues and claims which were the subject of the claim.
         See "The Exchange Offer and Proposal--Litigation and Related Matters."

         In addition, Investors in partnerships which were sponsored by a third
         party have sued Benton on the theory that since it provided oil and gas
         drilling prospects to those partnerships and operated substantially all
         of their properties, it was responsible for alleged violations of
         securities laws in connection with the offer and sale of interests,
         contractual breach of fiduciary duty and fraud. See "The Exchange Offer
         and Proposal--Litigation and Related Matters."

         Retention and Attraction of Key Personnel. Benton depends to a large
         extent on the abilities and continued participation of certain key
         employees, the loss of whose services could have a material adverse
         effect on Benton's business.

         Regulation. The oil and gas industry is subject to broad and frequently
         changing regulations that could adversely affect the operations of 
         Benton.

         In spite of the foregoing risks, Benton initiated and proposed the
Exchange Offer and recommends adoption of the Proposal by the Partnership to
enable Benton to acquire the assets and liabilities of the Partnership and to
provide Investors with the potential benefits summarized in the Prospectus under
the caption "Reasons for the Exchange Offer."

      MANAGING GENERAL PARTNER'S DETERMINATION THAT EXCHANGE OFFER IS FAIR

         THE MANAGING GENERAL PARTNER OF THE PARTNERSHIP HAS DETERMINED THAT THE
EXCHANGE IS FAIR AND IS IN THE BEST INTERESTS OF THE PARTNERSHIP AND ITS
PARTNERS AND HAS RECOMMENDED THAT THE PARTNERS OF THE PARTNERSHIP TENDER THEIR
PARTNERSHIP UNITS AND CONSENT TO THE PARTNERSHIP PROPOSAL. THE EXCHANGE OFFER IS
NOT CONDITIONED UPON ACCEPTANCE AND APPROVAL BY ALL OF THE PARTNERSHIPS AND THE
MANAGING GENERAL PARTNER BELIEVES THAT THE OFFER IS FAIR



                                       7
 
<PAGE>   281


TO ALL INVESTORS, REGARDLESS OF WHICH OR THE NUMBER OF PARTNERSHIPS WHICH ACCEPT
THE EXCHANGE OFFER FOR THE REASONS SET FORTH BELOW.

                  General. The Managing General Partner has analyzed the terms
of the Exchange Offer, the consideration and value offered to the Investors in
exchange for their Partnership Units and the value of consideration an Investor
could expect to receive under various alternatives to the Exchange. In
determining that the Exchange Offer is fair to the Investors, the Managing
General Partner considered that the Investors who do not accept the Exchange
Offer or who do not elect to receive cash in lieu of Benton Common Stock will
receive Common Stock and Warrants of Benton, and could receive cash if the
Partnership was continued or liquidated. However, the Managing General Partner
believes that because an Investor may elect to receive cash in lieu of Common
Stock if the sale to Goldking is consummated, the Investors will receive
consideration in excess of the alternatives to the Exchange if the Exchange
Offer is accepted. The Managing General Partner's analysis of the consideration
an Investor could receive under the alternatives to the Exchange are discussed
below. The Managing General Partner believes that those Investors who receive
Benton Common Stock will have access to a public trading market if such Investor
elects to liquidate his investment for cash. The average daily trading volume
for the Benton Common Stock on the NASDAQ National Market for the 30 trading
days ended September 27, 1995 was 259,000 shares. The Managing General Partner
believes that since the maximum aggregate number of shares of Benton Common
Stock that will be issued in the Exchange Offer for all three Partnerships is
171,880, the issuance will have no material effect on the market value of the
Benton Common Stock, and may allow all Investors receiving shares of Benton
Common Stock in connection with the Exchange Offer and liquidation of the
Partnerships to liquidate their investment in the market.

         Alternatives to the Exchange. The Managing General Partner's analysis
of the most probable results of continuing the Partnership indicate that, while
continuing the Partnership would avoid the risks associated with the ownership
of Common Stock in Benton, Investors will receive potentially greater values by
participating in the Exchange than the values they would derive from this
alternative. Benton estimates that continuing the 1990-1 Partnership under
market and operating conditions prevailing in 1994 would likely generate
decreasing annual distributions of $114 per 1989-1 Unit in 1995, $146 in 1996,
$91 in 1997 and $7 in 1998. Benton estimates that the remaining economic life of
the 1989-1 Partnership is 3.5 years. Benton believes that the Partnership will
have no residual value in its assets at the end of the economic life of the
Partnership.

         The Managing General Partner also believes that, while liquidating the
Partnership would provide an immediate cash return and avoid the risks
associated with owning Benton Common Stock, the Exchange will provide Investors
with greater values than they would likely receive in liquidation of the
Partnership. Benton's liquidation analysis reflects an estimated liquidation
value of approximately $294,634 of the 1989-1 Partnership, or $1,045 per Unit.
Benton received an independent offer from Goldking to purchase the Partnership's
interest in the Umbrella Point Field (which represents 99.3% of the total Proved
Reserves of the Partnership) for an estimated total purchase price in cash of
$323,296 as of June 30, 1995, subject to adjustments. This estimated 



                                       8


<PAGE>   282

purchase price would represent potential cash distributions to the Investors
equal to $1,147 per Unit. Benton's liquidation analysis is based on the
anticipated proceeds from the sale of the Umbrella Point Field to Goldking, plus
working capital for the Partnership at June 30, 1995, less estimated general and
administrative costs involved in liquidation of the Partnership. For purposes of
determining the general and administrative costs to the Partnership, Benton
estimated that general and administrative expenses would approximate the general
and administrative expenses incurred by the Partnership during the year ended
December 31, 1994.

         The following table summarizes the results of Benton's liquidation
analysis in comparison to the Exchange Values for the Partnership Units
determined by Benton. The table also includes valuation data derived from
Benton's analysis of continuing the Partnership. Benton did not undertake its
continuation analysis for the purpose of valuing the Partnership, but solely to
illustrate the likelihood of decreasing distributions based on oil and gas
prices at December 31, 1994. However, because SEC disclosure standards for roll
up transactions require a comparison of the value of the consideration offered
in the transaction with the value of the consideration estimated for each
alternative to the transaction, the tables also reflect the results of extending
Benton's continuation analysis for the balance of the estimated life of the
Partnership's Proved Reserves, and discounting the projected stream of
distributions to present value at the same 10% discount rate used in Benton's
liquidation analysis to account for the timing of cash flows as well as
production and concentration risks.

<TABLE>
<CAPTION>
VALUATION METHOD                                                               TOTAL                  VALUE PER
- ----------------                                                         INVESTOR VALUE(1)           1989-1 UNIT
                                                                         -----------------           -----------
<S>                                                                      <C>                         <C>
Exchange Value...................................................           $370,098                   $1,312
Liquidation value estimated by Benton............................            294,634                    1,045
Continuation analysis by Benton assuming natural gas
    prices of $1.63 per Mcf and oil prices of $15.94
    per Bbl(2)...................................................             90,661                      322
Value of Proved Reserves at December 31, 1994(3).................            325,540                    1,155
</TABLE>


(1) The Exchange Value and liquidation value attribute no value to Managing
    General Partners' interests. The continuation analysis assumes continued
    distributions to the Managing General Partner pursuant to the terms of the
    Partnership Agreement.

(2) The assumed natural gas and oil prices are the prices used for preparation
    of the Partnership's reserve report at December 31, 1994. The continuation
    analysis was calculated based upon Benton's estimate of the remaining
    economic life of the Partnership, estimated to be 3.5 years.

(3) Based on the Partnership's December 31, 1994 reserve report prepared by the
    Company and audited by Huddleston. The reserves are valued at December 31 of
    each year, based on oil and natural gas prices as of that date. Market
    prices for both oil and gas are subject to a significant degree of
    variation, and this variation will affect the calculation of future net cash
    flows reported by the Partnership at any specific date.



                                       9


<PAGE>   283


         The actual amount that Investors would receive if the Partnership
continued its operations would depend on production levels, which cannot be
predicted with certainty. In addition, the actual amount that Investors would
receive under either of the alternatives to the Exchange would depend on future
oil and gas prices. To the extent that future prices for those commodities are
materially higher or lower than the pricing assumptions made by the Managing
General Partner, those fluctuations would likely have a similar effect on the
operating results, distribution rates and market value of the Partnership Units,
largely negating the effect of price changes on a comparison between the
Exchange and either alternative of continuing the Partnership or liquidating its
assets. In addition, Benton believes that liquidating the Partnership would
deprive Investors of the opportunity to benefit from any future upturn in oil
and gas prices.

         For a more detailed discussion of the bases for the Managing General
Partner's determination that the Exchange Offer is fair to Investors, see
"Recommendation of the Managing General Partner" contained at page 65 of the
Prospectus.

                         DETERMINATION OF EXCHANGE VALUE

         Components of the Exchange Value. The most significant assets
considered in determining the Exchange Values were the anticipated cash proceeds
from the sale of Umbrella Point Field and Proved Reserves of the Partnership.
The Exchange Values reflect these oil and gas assets and all other assets and
liabilities of the Partnership. These components reflect (i) the estimated cash
proceeds from the sale of Umbrella Point Field to Goldking, (ii) the estimated
present value of future net cash flows from the Proved Reserves of the
Partnership as of December 31, 1994, discounted at 10% per year and calculated
without escalation of prices and costs, (iii) the net book value of current
assets and liabilities of the Partnership as of June 30, 1995, and (iv) the
tax-basis balances of equipment as of December 31, 1994, and (v) the General
Intangibles of the Partnership. Based on management's experience in evaluating
reserve acquisition opportunities and transactions in the Partnership's
production areas, Benton believes that the components of the Exchange Values
reflect all appropriate valuation criteria for the Partnership in accordance
with industry practice. Each component of the Exchange Value, estimated on the
basis of interim data, is presented for the Partnership in the tables and
discussions herein.

         In determining the Exchange Value, Benton considered the total
distributions paid to date to participants in the respective Partnerships. For
each of the Partnerships, Benton assigned a Total Exchange Value to the
Partnership which, based upon certain assumptions described below, and in
addition to the distributions paid to date, would provide Investors with
consideration valued at 100% of their initial contribution to the Partnership.
The estimated cash proceeds from the sale of the working interests in the
Umbrella Point Field to Goldking and the value of other tangible assets of the
Partnership are attributable to shares of Benton Common Stock, or cash if the
Investor makes the cash election described herein. The remaining dollar value,
if any, is referred to herein as General Intangibles. Pursuant to the Exchange
Offer, value attributed to General Intangibles will be distributed to Investors
in the form of Warrants.



                                       10
<PAGE>   284

         The number of shares of Common Stock and Warrants to be issued pursuant
to the Exchange Offer has been determined relative to a Total Exchange Value
assigned to the 1989-1 Partnership Units, aggregating $370,098. The number of
shares of Common Stock offered in exchange for Partnership Units has been
determined by dividing the Exchange Value of the tangible assets of the
Partnership by a Common Stock price of $11.00, subject to rounding adjustments.
The Common Stock price is based upon the average closing price of the Common
Stock on NASDAQ-National Market for the 20 trading days immediately preceding
September 12, 1995 and will not reflect any subsequent increase or decrease in
the market price for the Common Stock after that date, except to the extent
required by dissenters' rights for California residents. The number of Warrants
to be assigned to each Partnership Unite was determined by dividing the
estimated value of the General Intangibles of the Partnership by the estimated
present value per Warrant. Benton has used the Black-Scholes option pricing
model to calculate the present value of the Warrants, which yielded a value of
$3.64 per Warrant. The Warrants are exerciseable at a price of $11.00 per share
and will expire three years from the date of issuance.

         The following unaudited table sets forth (i) the components of the
Exchange Values of the Units and (ii) the Exchange Value per Unit held by an
Investor. This information was compiled by Benton from the Partnership's reserve
report as of December 31, 1994 (a summary of which is included in Exhibit B to
this Prospectus) and the Partnership's tax records for the year ended December
31, 1994 and financial statements for the six months ended June 30, 1995.

         The following table sets forth each of the Exchange Value components,
estimated on an interim basis.

                            EXCHANGE VALUE COMPONENTS

<TABLE>
         <S>                                                                                      <C> 
         Estimated Cash Proceeds-Umbrella Point Field..........................................   $323,263
         Present value of Proved Reserves of other properties (SEC PV 10)......................          0
         Cash..................................................................................      5,717
         Intercompany receivable--Benton Oil and Gas Company...................................        621
         Value of equipment....................................................................      4,563
         General Intangibles...................................................................     35,901

         Exchange Value........................................................................   $370,098
                                                                                                  --------   
</TABLE>

         Anticipated Sales Proceeds. In July 1995, Benton, on behalf of the
Partnership, and Goldking executed an agreement whereby Goldking will purchase a
4.93% working interest in the Umbrella Point Field from the Partnership, subject
to approval of the participants of the Partnership. Upon execution of the
agreement, Goldking made an earnest money deposit in favor of the Partnership in
the amount of $4,929, included as current assets of the Partnership (the
"Deposit"). Subject to closing adjustments and excluding the Deposit, as of June
30, 1995 the Partnership's estimated cash proceeds from the sale would be
$323,263, or $1,147 per 1989-1 Unit. Benton has made this Exchange Offer in
contemplation of such sale, but the Exchange Offer is not conditioned upon
consummation of such sale.

         Other Assets and Liabilities. The tax-basis balances of the 1989-1
Partnership's equipment, excluding Umbrella Point Field equipment, aggregated
$4,563 at December 31, 1994, 



                                       11

<PAGE>   285


and the net book value of its current assets and liabilities as of June 30, 1995
reflect a balance of $6,338, excluding property held for sale. The equipment
value and current net assets are based upon the 1989-1 Partnership's 1994
year-end tax accounting records and June 30, 1995 unaudited financial
statements, respectively, maintained in accordance with the applicable
provisions of the 1989-1 Partnership Agreement.

         Benton believes that valuing the 1989-1 Partnership's equipment
(comprised of oil and gas production and transportation facilities) at its
tax-basis balances is favorable to the sellers of the producing properties since
many purchasers in transactions evaluated by Benton, as part of its on-going
involvement in the production area, allocate nominal value to well equipment on
the theory that its salvage value at the end of the commercial lives of acquired
wells will approximate the cost of plugging and abandoning the wells. Benton
believes that the original cost of the equipment less the deductions computed
through 1994 year end for tax purposes represents a reasonable approximation of
the fair market value of the equipment to Benton. Benton also believes that
valuing the current assets and liabilities of the 1989-1 Partnership (comprised
of cash and intercompany receivable) at their book value as of June 30, 1995 is
appropriate to reflect the fair market value of these items, which are expected
to be collected and paid to Benton, to the extent outstanding, in the stated
amounts reflected in the 1989-1 Partnership's unaudited balance sheet as of that
date.

         General Intangibles. In determining the value attributed to General
Intangibles, Benton evaluated the success to date of the 1989-1 Partnership,
total consideration paid to date to the participants and the value to Benton of
dissolving and liquidation the 1989-1 Partnership so that Benton can focus on
its current operations and reduce the administrative burdens associated with
operating the Partnership. Based upon Benton's evaluation of historical
administrative costs for the 1989-1 Partnership, Benton estimates that the
administrative costs for operating the Partnership will be approximately $35,000
per year. From inception through July 1995, the 1989-1 Partnership has made cash
distributions to participants aggregating $848,836, or $3,012 per 1989-1 Unit.
In forming the 1989-1 Partnership, Benton sold an aggregate of $1,409,091 in
1989-1 Units. Benton acknowledges the concerns raised by the Investors in the
1989-1 Partnership with regard to operations of the Partnership, the lack of
success and thus the disappointing returns on investment by the Investors.
Because many of the Investors are or were stockholders of Benton, Benton desires
to maintain a good relationship with these stockholders, many of whom have been
strong supporters of Benton from inception, and Benton desires to avoid future
claims against it by participants relating to the management of the Partnership.
See "The Exchange Offer and Proposal--Litigation and Related Matters" in the
Prospectus. Assuming that the Investor in the 1989-1 Partnership elects to hold
his or her shares of Common Stock and exercises his or her Warrants at the end
of the three-year term, and the market price of the Common Stock is at or above
approximately $16.75 per share, Benton believes that the Investors in the 1989-1
Partnership, will have received consideration in the form of cash distributions,
Common Stock and Warrants in excess of the initial investment in the 1989-1
Partnership, without regard to any tax benefits received by the participants. On
October 2, 1995, the last sales price of the Benton Common Stock on NASDAQ
National Market was $11.13 per share. The assumed market price of the Common
Stock of $16.75 per share discussed above represents a 33% increase in the
market value of the Benton Common Stock during the three year term of the
Warrants. There can be no assurance that the market price of the Benton Common
Stock will increase



                                       12

<PAGE>   286



or that such price will be achieved. The value of the General Intangibles of the
Partnership is not subject to valuation by third parties since the General
Intangibles do not represent actual assets of the Partnership. Benton believes
that the participants in the Partnership will not receive any value for the
General Intangibles in any alternative to the Exchange.




                                       13


<PAGE>   287



                  COMPENSATION PAID TO MANAGING GENERAL PARTNER

         The following table sets forth the amount of compensation paid, and
cash distributions made, to the Managing General Partner and its affiliates by
the Partnership for each of the last three fiscal years and the six months ended
June 30, 1995.

<TABLE>
<CAPTION>
PERIOD                                       CASH DISTRIBUTIONS PAID                COMPENSATION PAID
- ------                                       -----------------------                -----------------
<S>                                          <C>                                    <C>
Year Ended December 31, 1994
Year Ended December 31, 1993
Year Ended December 31, 1992
Six Months Ended June 30, 1995
</TABLE>

         None of the compensation paid or cash distributions made to the
Managing General Partner by the Partnership would have been paid by the
Partnership during the periods set forth above if the Exchange Offer had been in
effect during such period. It is anticipated that substantially all of the
assets of the Partnership will be sold to Goldking immediately following
consummation of the Exchange Offer. If such sale is consummated, Benton will
receive cash proceeds of approximately $323,296 for the sale of the working
interest in the Umbrella Point Field as of June 30, 1995, and subject to
adjustments. If all Investors in the Partnership elect to receive cash in lieu
of Common Stock in connection with the Exchange, Benton will receive no cash
proceeds from the sale.

                         CASH DISTRIBUTIONS TO INVESTORS

         The following table sets forth the cash distributions paid to Investors
for during each of the years in the five year period ended December 31, 1994,
and during the six months ended June 30, 1995. None of the distributions
represent a return of capital, unless noted.

<TABLE>
<CAPTION>
1990                 1991               1992                1993               1994               1995
- ----                 ----               ----                ----               ----               ----
<S>                  <C>                <C>                 <C>                <C>                <C>   
$500(1)              $747(2)            $1,003              $600               $162               $0
</TABLE>

(1)  Of these distributions, $192 represents distributions of earnings.
(2)  Of these distributions, $61 represents distributions of earnings.

         For additional financial information concerning the Partnership and
Benton, see "Information Concerning the 1989-1 Partnership - Selected Historical
Financial Data" and "Unaudited Pro Forma Financial Information" contained in the
Prospectus.



                                       14
<PAGE>   288
PROSPECTUS SUPPLEMENT
1990-1 PARTNERSHIP


                             SUBJECT TO COMPLETION
                             DATED OCTOBER 3, 1995


                                 EXCHANGE OFFER
               OF AN AGGREGATE OF 114,954 SHARES OF COMMON STOCK
    AND WARRANTS TO PURCHASE AN AGGREGATE OF 474,010 SHARES OF COMMON STOCK
                            FOR PARTNERSHIP UNITS IN
            BENTON OIL & GAS COMBINATION PARTNERSHIP 1990 - 1, L.P.
                         (1,419.192 PARTNERSHIP UNITS)

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

                                EXCHANGE RATIO:
    81 SHARES OF COMMON STOCK AND 334 WARRANTS PER 1990-1 PARTNERSHIP UNIT

         This Supplement accompanies a Prospectus (the "Prospectus") and is
being furnished to the Investors ("Investors") in the Benton Oil & Gas
Combination Partnership 1990-1, L.P., a California limited partnership (the
"Partnership") in connection with the offer by Benton Oil and Gas Company, a
Delaware corporation and the managing general partner of the Partnership
("Benton," or "Company," or "Managing General Partner") to exchange shares of
Common Stock, $.01 par value of Benton ("Common Stock") and Warrants
("Warrants") to purchase shares of Common Stock of Benton (the "Exchange
Offer") for all of the right, title and interest to units of Partnership
interest in the Partnerships ("Partnership Units") held by Investors, at the
exchange rate outlined below.  Benton has offered to exchange shares of Common
Stock and Warrants for all of the right, title and interest to units of
partnership interest in the Benton Oil & Gas Combination Partnership 1989-1,
L.P. (the "1989-1 Partnership") and the Benton Oil & Gas Combination
Partnership 1991-1, L.P. (the "1991-1 Partnership") on the terms and at the
exchange rates set forth in the Prospectus.  A separate supplement has been
prepared for each of the Partnerships.  THE EFFECTS OF THE EXCHANGE OFFER MAY
BE DIFFERENT FOR INVESTORS IN THE VARIOUS PARTNERSHIPS.  UPON RECEIPT OF A
WRITTEN REQUEST BY AN INVESTOR OR HIS REPRESENTATIVE WHO HAS BEEN DESIGNATED IN
WRITING, A COPY OF ANY SUPPLEMENT WILL BE TRANSMITTED PROMPTLY, WITHOUT CHARGE,
BY BENTON.  ANY SUCH REQUEST SHOULD BE FORWARDED TO THE ATTENTION OF TONI L.
JACKSON, BENTON OIL AND GAS COMPANY, 1145 EUGENIA PLACE, SUITE 200,
CARPENTERIA, CALIFORNIA 93013.

         Benton is offering to exchange shares of Common Stock and Warrants to
owners of Partnership Units in the 1990-1 Partnership (the "1990-1 Units") on
the basis of $5,000.00 original investment on the terms and in the amounts set
forth herein. The Warrants to be issued in connection with the Exchange Offer
are exercisable at a price of $11.00 per share and will expire three years form
the date of issuance.  For detailed information regarding the determination of
the Total Exchange Values for each of the Partnerships, see " Determination of


                                       1
<PAGE>   289

Exchange Value."  On October 2, 1995, the last reported sales price of the
Common Stock, as reported on NASDAQ National Market, was $11.13.

         In connection with the Exchange Offer, Benton is submitting a Proposal
to Investors in the Partnership to amend the Partnership Agreement to provide
for the transfer of all of the assets and liabilities of the Partnership to
Benton as of the December 31, 1994 Effective Date in exchange for Common Stock
and Warrants in the amounts set forth herein and the pro rata distribution of
such consideration in liquidation of the Partnership.  Each Investor who
tenders his Partnership Units pursuant to the Exchange Offer will, by that
tender, consent to the Proposal.

         ADOPTION OF THE PROPOSAL REQUIRES THE CONSENT OF INVESTORS OF THE
PARTNERSHIP HOLDING 75% OF THE PARTNERSHIP UNITS.  IF INVESTORS IN THE
PARTNERSHIP HOLDING NOT LESS THAN 75% OF THE PARTNERSHIP UNITS ACCEPT THE
EXCHANGE OFFER AND CONSENT TO THE PROPOSAL, ALL NON-DISSENTING HOLDERS OF UNITS
IN THE PARTNERSHIP WILL BE BOUND BY THE TERMS OF THE EXCHANGE AND PROPOSAL AND
WILL RECEIVE THE NUMBER OF SHARES OF COMMON STOCK AND WARRANTS DESCRIBED
HEREIN.  A SIMILAR EXCHANGE OFFER AND PROPOSAL IS BEING OFFERED TO INVESTORS IN
TWO OTHER PARTNERSHIPS.  EACH OF THE EXCHANGE OFFERS TO THE PARTNERSHIPS IS
INDEPENDENT OF THE EXCHANGE OFFER TO THE OTHER PARTNERSHIPS.  THE EXCHANGE WILL
ONLY BE CONSUMMATED FOR THE PARTNERSHIP IF THE PROPOSAL HAS BEEN APPROVED BY
THE INVESTORS.  BENTON OIL AND GAS COMPANY, IN ADDITION TO BEING MANAGING
GENERAL PARTNER OF THE THREE PARTNERSHIPS, OWNS 14.192 1990 - 1 UNITS AND WILL
VOTE SUCH UNITS THE SAME AS A MAJORITY OF INVESTORS VOTE THEIR UNITS. INVESTORS
WILL RECEIVE THE CONSIDERATION SET FORTH HEREIN, AND THE RESPECTIVE PARTNERSHIP
WILL BE DISSOLVED.

         ASSUMING CONSUMMATION OF THE EXCHANGE OFFER, ALL OF THE INVESTORS IN
THE PARTNERSHIP, WHETHER OR NOT THEY TENDER THEIR UNITS AND THUS VOTE IN FAVOR
OF THE PROPOSAL, WILL RECEIVE THE SAME NUMBER OF SHARES OF COMMON STOCK AND
WARRANTS AS THEY WOULD HAVE RECEIVED HAD THEY TENDERED THEIR PARTNERSHIP UNITS
AND THE PARTNERSHIP WILL BE DISSOLVED.

         THE EXCHANGE OFFER INVOLVES VARIOUS RISKS THAT SHOULD BE CONSIDERED BY
INVESTORS. SEE "RISK FACTORS AND MATERIAL CONSIDERATIONS," BEGINNING ON PAGE 4
OF THIS SUPPLEMENT. IN PARTICULAR, INVESTORS SHOULD CONSIDER THE FOLLOWING
FACTORS:
          -    INVESTORS HAD RECEIVED CASH DISTRIBUTIONS FROM THE PARTNERSHIP,
               BUT WILL RECEIVE NO CASH DISTRIBUTIONS OR DIVIDENDS IN THE
               FORESEEABLE FUTURE FROM BENTON.
          -    THE MARKET PRICE OF THE COMMON STOCK COULD DECLINE BELOW THE
               MARKET PRICE USED FOR CALCULATION OF THE EXCHANGE RATES,
               EXPOSING INVESTORS TO A REDUCED RETURN ON THEIR INVESTMENT.
          -    THE EXCHANGE VALUE OF THE PARTNERSHIP UNITS WAS DETERMINED BY
               BENTON, WHICH HAS INHERENT CONFLICTS OF INTEREST, AND MAY NOT
               REFLECT THE VALUE OF THE NET ASSETS OF THE PARTNERSHIP IF SOLD
               TO AN UNAFFILIATED THIRD PARTY IN AN ARM'S LENGTH TRANSACTION.
          -    BENTON HAS ATTRIBUTED A PRESENT VALUE TO THE WARRANTS, USING THE
               BLACK - SCHOLES OPTION PRICING MODEL. HOWEVER, THE ACTUAL VALUE,
               IF ANY, A HOLDER MAY REALIZE


                                       2
<PAGE>   290
               FROM THE WARRANTS WILL DEPEND ON THE EXCESS OF THE MARKET PRICE
               OF THE COMMON STOCK OVER THE EXERCISE PRICE OF THE WARRANT ON
               THE DATE THE WARRANT IS EXERCISED.
          -    BENTON'S DETERMINATIONS OF THE EXCHANGE VALUES WERE BASED
               PRIMARILY ON THE ESTIMATED PRESENT VALUE OF THE PARTNERSHIP'S
               PROVED OIL AND GAS RESERVES, WHICH INVOLVES MANY UNCERTAINTIES
               AND COULD RESULT IN AN UNDERVALUATION OF PARTNERSHIP UNITS.
               ALTHOUGH SUPPORTED BY AN INDEPENDENT OFFER FOR THE PURCHASE OF
               SUBSTANTIALLY ALL OF THE ASSETS OF THE PARTNERSHIP, THERE CAN BE
               NO ASSURANCE THAT THE EXCHANGE VALUE REPRESENTS THE VALUE THE
               PARTNERSHIP COULD RECEIVE IN THE SALE OF THE ASSETS OF THE
               PARTNERSHIP.
          -    THE ALTERNATIVES OF CONTINUING THE PARTNERSHIP OR LIQUIDATING
               ITS ASSETS COULD POTENTIALLY BE MORE BENEFICIAL TO INVESTORS
               THAN THE EXCHANGE OFFER.
          -    NO INDEPENDENT REPRESENTATIVE WAS ENGAGED TO REPRESENT THE
               UNAFFILIATED INVESTORS IN NEGOTIATING THE TERMS OF THE EXCHANGE
               OFFER, WHICH MAY BE INFERIOR TO THOSE THAT COULD HAVE BEEN
               NEGOTIATED BY AN INDEPENDENT REPRESENTATIVE.
          -    INVESTORS HAVE NO DISSENTER'S RIGHTS IN THE EXCHANGE OFFER,
               OTHER THAN LIMITED DISSENTERS' RIGHTS FOR CALIFORNIA RESIDENTS,
               AND THEREFORE CANNOT ELECT TO RECEIVE CASH FOR THEIR PARTNERSHIP
               UNITS.
          -    OWNERSHIP OF COMMON STOCK MAY INVOLVE GREATER RISK THAN AN
               INVESTMENT IN THE PARTNERSHIP UNITS BECAUSE OF BENTON'S BROADER
               OPERATIONS, INCLUDING FOREIGN OPERATIONS, AND ITS USE OF DEBT TO
               FINANCE ONGOING OPERATIONS.
          -    FUTURE EQUITY OFFERINGS BY BENTON COULD POTENTIALLY BE DILUTIVE
               TO INVESTORS HOLDING COMMON STOCK OR WARRANTS.

         The Exchange may be withdrawn at any time prior to its scheduled
expiration date if Benton reasonably determines that a material change
affecting the Partnership or the Company has occurred. THE EXCHANGE WILL ONLY
BE CONSUMMATED IF THE PROPOSAL HAS BEEN APPROVED BY THE INVESTORS. The assets
and liabilities of the Partnership, if the Proposal is approved and the
Exchange Offer is accepted, will be transferred to Benton effective as of
December 31, 1994 (the "Effective Date").

               --------------------------------------------------
THE EXCHANGE OFFER EXPIRES AT 5:00 P.M. PACIFIC TIME ON             , 1995
UNLESS EXTENDED.
               --------------------------------------------------
  THE SHARES OF COMMON STOCK AND WARRANTS TO BE ISSUED IN
CONNECTION WITH THE EXCHANGE HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE
SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS
THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION
PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO
THE CONTRARY IS A CRIMINAL OFFENSE.

               THE DATE OF THIS SUPPLEMENT IS             , 1995.


                                       3
<PAGE>   291

The information contained in this Supplement is being provided to Investors in
the Benton Oil & Gas Combination Partnership 1990-1, L.P. (the "Partnership").
The information contained in this Supplement is not intended to be a complete
description of all matters covered in the Prospectus, and Investors are
encouraged to review all information set  forth in the Prospectus.


                    RISK FACTORS AND MATERIAL CONSIDERATIONS


         The Exchange Offer. In addition to the information included in this
Supplement and the Prospectus, the Investors should carefully consider the
following factors in determining whether to accept the Exchange Offer and
consent to the Proposal. The risk factors summarized below are described in
further detail elsewhere in the Prospectus at "Risk Factors and Material
Considerations," beginning at page 34.

        Lack of Arm's Length Negotiations and Uncertainties in the Method of
        Determining Exchange Values. The Exchange Value was determined by
        Benton, based in part on an offer for the purchase of substantially all
        of the assets of the Partnership from an unaffiliated third party
        (Goldking Trinity Bay Corp.), but may not reflect the actual value of
        the net assets of the Partnership. The primary assets of the Partnership
        considered by Benton when determining the Exchange Value were the proved
        oil and gas reserves of the Partnership (the "Proved Reserves") and the
        present value of associated future net cash flow as of December 31,
        1994, as well as the offer to purchase the Umbrella Point Field by
        Goldking, described herein and in the Prospectus. There are many
        uncertainties inherent in estimating quantities of Proved Reserves, and
        the present value attributed to the Partnership's Proved Reserves may be
        less than the future net cash flows actually received from the
        Partnership's interest in its wells. In that event, the use of this
        valuation methodology will have resulted in an undervaluation of the
        Partnership Units. See "Method of Determining Exchange Value."

         Potential Decline in Market Price of Common Stock. Access to an active
         trading market by exchanging Investors may result in a relatively
         large number of shares of Common Stock offered for sale immediately
         after the Closing Date. This may tend to lower the market price for
         the Common Stock. Future market conditions in the oil and gas industry
         in general or the effect of the conditions on Benton in particular
         could also adversely affect the market price of the Common Stock and
         thus the value of the Warrants. There can be no assurance regarding
         the potential appreciation in the market price of the Common Stock.
         Any decline in the market price of the Common Stock could reduce the
         Investor's return on investment or increase the loss on the Investor's
         original investment.

         Potential Benefits of Alternatives to the Exchange. The alternatives
         to the Exchange Offer are the continuation of the Partnership or the
         liquidation of the Partnership's assets and distribution of the
         liquidation proceeds to Investors, either of which could potentially
         be


                                       4
<PAGE>   292
         more beneficial to Investors than the Exchange by avoiding the risks
         associated with ownership of Benton Common Stock and, in the case of a
         liquidation of the Partnership, by providing an immediate cash return
         to Investors. See "Recommendation of the Managing General Partner --
         Managing General Partner's Determination that Exchange Offer is Fair
         -- Alternatives to the Exchange" contained in the Prospectus.

         Lack of Independent Representatives for Investors; No Fairness
         Opinion. No independent representative was selected or hired to
         represent the interests of the Investors in negotiating the terms of
         the Exchange Offer. The Exchange Values and other terms of the
         Exchange Offer may therefore be inferior to those that could have been
         negotiated by an independent representative. Benton did not retain an
         independent third party to render an opinion regarding the fairness of
         the terms of the Exchange Offer to the Investors.

         Limited Dissenters' Rights. Investors who are California residents and
         who oppose the Proposal will have limited dissenters' rights. Other
         Investors who oppose the Proposal will have no dissenters' rights or
         appraisal rights, and therefore, no option to receive cash based on a
         separate appraisal of the Partnership assets in lieu of the Common
         Stock and Warrants based on the Exchange Values determined by Benton.
         The Managing General Partner could have provided all Investors with
         appraisal rights in structuring the Exchange Offer but elected not to
         do so, primarily because such rights are not provided for in the
         Partnership Agreements. The absence of these rights limit the options
         that would otherwise be available to Investors opposing the Exchange
         Offer.

         Effect of Dissenters' Rights on California Investors.  Investors
         residing in California will be afforded limited dissenters' rights in
         accordance with the requirements for roll-up transactions under the
         California Code. By voting against the Proposal, Investors in the
         State of California will be deemed to exercise their dissenters'
         rights and will receive the number of shares of Common Stock and
         Warrants equal to the Exchange Value of their interests divided by the
         closing price of the Common Stock on the NASDAQ National Market during
         the twenty days immediately after the Closing Date.  If that average
         price is lower than the Exchange Price, dissenting California
         Investors will receive more shares of Common Stock than they would
         otherwise receive in the Exchange Offer.  If, however, the average
         price is higher than the Exchange Price, a dissenting California
         Investor would receive fewer shares of Common Stock and Warrants.
         California Investors hold a substantial portion of the interests in
         the Partnership, and the impact of the exercise of dissenters' rights
         could materially increase the number of shares of Common Stock issued
         by Benton in connection with the Exchange Offer.

         Conflicts of Interest of Benton. Benton is the Managing General
         Partner of the Partnership and its determination of the Exchange Value
         involves an inherent conflict of interest. As Managing General
         Partner, Benton owes fiduciary duties to the Investors in the
         Partnership. In addition, it owes a duty to its stockholders. While
         Benton believes that it has fulfilled these obligations in its
         determination of the Exchange Value, which is supported, in part, by a
         reserve report audited by an independent petroleum engineer, no degree
         of objectivity or professional competence can eliminate the inherent
         conflict of





                                       5
<PAGE>   293
         interest. See "Recommendation of the Managing General Partner --
         Fiduciary Duties of Benton" contained in the Prospectus.

         Benton Dividend Policy. Benton's policy is to retain its earnings to
         support the growth of Benton's business. Accordingly, the Board of
         Directors of Benton has never declared cash dividends on its Common
         Stock and does not plan to do so in the foreseeable future.
         Furthermore, the terms of Benton's debt agreements prohibit Benton
         from paying cash dividends on its Common Stock. Thus, upon
         consummation of the Exchange, Investors will no longer receive cash
         distributions and it is unlikely that cash dividends will be paid on
         the Benton Common Stock at any time in the foreseeable future.

         No Fractional Shares. No fractional shares will be issued in
         connection with the Exchange Offer. An Investor who would otherwise be
         entitled to a fractional share of Common Stock will be paid cash in
         lieu of such fractional shares. Warrants issued in connection with the
         Exchange Offer will be rounded to the nearest whole number of Warrants
         and no fractional interest will be issued.

         Risks Associated with Ownership of Common Stock of Benton. In addition
to the information included in this Supplement and the Prospectus, the
Investors should carefully consider the following factors related to Benton in
determining whether to accept the Exchange Offer. The risk factors summarized
below are described in further detail in the Prospectus at "Risk Factors and
Material Considerations."

         Losses From Benton's Operations. The historical financial data for
         Benton reflects net losses and decreased revenues for the years ended
         December 31, 1992 and 1993. Benton's ability to maintain its financing
         arrangements, produce its oil and gas reserves and service its debt
         obligations would be adversely affected by a lack of profitability.

         Foreign Operations. Almost all of Benton's oil and gas revenues and
         Proved Reserves are attributable to its operations in Venezuela and
         Russia. Benton's Venezuelan and Russian operations are subject to
         political, economic and other uncertainties inherent in the
         development of foreign properties.

         Properties Under Development. A substantial amount of Benton's Proved
         Reserves are undeveloped and require development activities and/or are
         proved developed behind - pipe or shut - in and require additional
         development activities. As a result, Benton will require substantial
         capital expenditures to develop all of its Proved Reserves.

         Engineers' Estimates of Reserves and Future Net Revenue. This
         Prospectus contains, and incorporates by reference, estimates of
         Benton's and the Partnerships' oil and gas reserves and future net
         revenues therefrom. Estimates of commercially recoverable oil and gas
         and the future net cash flows derived therefrom are based upon a
         number of variable factors and assumptions. Estimates to some degree
         are speculative and estimates of the commercially recoverable reserves
         of oil and natural gas, and the future net cash flows therefrom,
         prepared by different engineers or by the same engineer at different





                                       6
<PAGE>   294
         times, may vary substantially. The difficulty of making precise
         estimates is accentuated because most of Benton's Proved Reserves were
         non-producing at December 31, 1994.

         Development of Additional Reserves. Benton's future success may also
         depend upon its ability to find or acquire additional oil and gas
         reserves that are economically recoverable. There can be no assurance
         that Benton will be able to discover additional commercial quantities
         of oil and gas, or that Benton will be able to continue to acquire
         interests in underdeveloped oil and gas fields and enhance production
         and reserves therefrom.

         Partnership Litigation. Certain limited partners in Benton's oil and
         gas limited partnerships, including the Partnerships that are the
         subject of this Exchange Offer, filed suit against Benton and others
         alleging breaches of contract, fiduciary duty and fraud. This suit has
         been voluntarily dismissed, subject to an agreement among the parties
         to arbitrate the issues and claims which were the subject of the
         claim. See "The Exchange Offer and Proposal -- Litigation and Related
         Matters."

         In addition, Investors in partnerships which were sponsored by a third
         party have sued Benton on the theory that since it provided oil and
         gas drilling prospects to those partnerships and operated
         substantially all of their properties, it was responsible for alleged
         violations of securities laws in connection with the offer and sale of
         interests, contractual breach of fiduciary duty and fraud. See "The
         Exchange Offer and Proposal -- Litigation and Related Matters" in the
         Prospectus.

         Retention and Attraction of Key Personnel. Benton depends to a large
         extent on the abilities and continued participation of certain key
         employees, the loss of whose services could have a material adverse
         effect on Benton's business.

         Regulation. The oil and gas industry is subject to broad and
         frequently changing regulations that could adversely affect the
         operations of Benton.

         In spite of the foregoing risks, Benton initiated and proposed the
Exchange Offer and recommends adoption of the Proposal by the Partnership to
enable Benton to acquire the assets and liabilities of the Partnership and to
provide Investors with the potential benefits summarized in the Prospectus
under the caption "Reasons for the Exchange Offer."

      MANAGING GENERAL PARTNER'S DETERMINATION THAT EXCHANGE OFFER IS FAIR

         THE MANAGING GENERAL PARTNER OF THE PARTNERSHIP HAS DETERMINED THAT
THE EXCHANGE IS FAIR AND IS IN THE BEST INTERESTS OF THE PARTNERSHIP AND ITS
PARTNERS AND HAS RECOMMENDED THAT THE PARTNERS OF THE PARTNERSHIP TENDER THEIR
PARTNERSHIP UNITS AND CONSENT TO THE PARTNERSHIP PROPOSAL.  THE EXCHANGE OFFER
IS NOT CONDITIONED UPON ACCEPTANCE AND APPROVAL BY ALL OF THE PARTNERSHIPS AND
THE MANAGING GENERAL PARTNER BELIEVES THAT THE OFFER IS FAIR TO ALL


                                       7
<PAGE>   295
INVESTORS, REGARDLESS OF WHICH OR THE NUMBER OF PARTNERSHIPS WHICH ACCEPT THE
EXCHANGE OFFER FOR THE REASONS SET FORTH BELOW.

                 General.  The Managing General Partner has analyzed the terms
of the Exchange Offer, the consideration and value offered to the Investors in
exchange for their Partnership Units and the value of consideration an Investor
could expect to receive under various alternatives to the Exchange.  In
determining that the Exchange Offer is fair to the Investors, the Managing
General Partner considered that the Investors who do not accept the Exchange
Offer or who do not elect to receive cash in lieu of Benton Common Stock will
receive Common Stock and Warrants of Benton, and could receive cash if the
Partnership was continued or liquidated.  However, the Managing General Partner
believes that because an Investor may elect to receive cash in lieu of Common
Stock if the sale to Goldking is consummated, the Investors will receive
consideration in excess of the alternatives to the Exchange if the Exchange
Offer is accepted.  The Managing General Partner's analysis of the
consideration an Investor could receive under the alternatives to the Exchange
are discussed below.  The Managing General Partner believes that those
Investors who receive Benton Common Stock will have access to a public trading
market if such Investor elects to liquidate his investment for cash.  The
average daily trading volume for the Benton Common Stock on the NASDAQ National
Market for the 30 trading days ended September 27, 1995 was 259,000 shares.
The Managing General Partner believes that since the maximum aggregate number
of shares of Benton Common Stock that will be issued in the Exchange Offer for
all three Partnerships is 171,880, the issuance will have no material effect on
the market value of the Benton Common Stock, and may allow all Investors
receiving shares of Benton Common Stock in connection with the Exchange Offer
and liquidation of the Partnerships to liquidate their investment in the
market.


         Alternatives to the Exchange.  The Managing General Partner's analysis
of the most probable results of continuing the Partnership indicate that, while
continuing the Partnership would avoid the risks associated with the ownership
of Common Stock in Benton, Investors will receive potentially greater values by
participating in the Exchange than the values they would derive from this
alternative. Benton estimates that continuing the 1990-1 Partnership under
market and operating conditions prevailing in 1994 would likely generate
decreasing annual distributions of $97 per 1990-1 Unit in 1995, $119 in 1996,
$76 in 1997, $30 in 1998, $10 in 1999 and $1 in 2,000.  Benton estimates that
the remaining economic life of the 1990-1 Partnership is 5.5 years.  Benton
believes that the Partnership will have no residual value in its assets at the
end of the economic life of the Partnership.

         The Managing General Partner also believes that, while liquidating the
Partnership would provide an immediate cash return and avoid the risks
associated with owning Benton Common Stock, the Exchange will provide Investors
with greater values than they would likely receive in liquidation of the
Partnership. Benton's liquidation analysis reflects an estimated liquidation
value of approximately $1,052,601 of the 1990-1 Partnership, or $742 per
Unit. Benton received an independent offer from Goldking to purchase the
Partnership's interest in the Umbrella Point Field (which represents 88.1% of
the total Proved Reserves of the Partnership) for an estimated total purchase
price in cash of $930,865 as of June 30, 1995, subject to adjustments. This


                                       8
<PAGE>   296
estimated purchase price would represent potential cash distributions to the
Investors equal to  $656  per Unit.  Benton's liquidation analysis is based on
the anticipated proceeds from the sale of the Umbrella Point Field to Goldking,
plus working capital for the Partnership at June 30, 1995, less estimated
general and administrative costs involved in liquidation of the Partnership.
For purposes of determining the general and administrative costs to the
Partnership, Benton estimated that general and administrative expenses would
approximate the general and administrative expenses incurred by the Partnership
during the year ended December 31, 1994.

         The following table summarizes the results of Benton's liquidation
analysis in comparison to the Exchange Values for the Partnership Units
determined by Benton. The table also includes valuation data derived from
Benton's analysis of continuing the Partnership. Benton did not undertake its
continuation analysis for the purpose of valuing the Partnership, but solely to
illustrate the likelihood of decreasing distributions based on oil and gas
prices at December 31, 1994. However, because SEC disclosure standards for roll
up transactions require a comparison of the value of the consideration offered
in the transaction with the value of the consideration estimated for each
alternative to the transaction, the tables also reflect the results of
extending Benton's continuation analysis for the balance of the estimated life
of the Partnership's Proved Reserves, and discounting the projected stream of
distributions to present value at the same 10% discount rate used in Benton's
liquidation analysis to account for the timing of cash flows as well as
production and concentration risks.


<TABLE>
<CAPTION>
VALUATION METHOD                                                           TOTAL                 VALUE PER
- ----------------                                                     INVESTOR VALUE(1)         1990 - 1 UNIT
                                                                     -----------------         -------------

<S>                                                                  <C>                       <C>
Exchange Value......................................................    $2,990,728                $2,107
Liquidation value estimated by Benton...............................     1,052,601                   742
Value of Proved Reserves at December 31, 1994 (2)...................     1,057,123                   745
Continuation analysis by Benton assuming natural gas prices
   of $1.63 per Mcf and oil prices of $15.94 per Bbl(3).............       415,355                   293

</TABLE>


(1)  The Exchange Value and liquidation value attribute no value to Managing
     General Partners' interests.  The continuation analysis assumes continued
     distributions to the Managing General Partner pursuant to the terms of the
     Partnership Agreement.

(2)  Based on the Partnership's December 31, 1994 reserve report prepared
     by the Company and audited by Huddleston. The reserves are valued as of
     December 31 of each year, based on oil and gas prices as of that date.
     Market prices for both oil and natural gas are subject to a significant
     degree of variation, and this variation will effect the calculation of
     future net cash flows by the Partnership at nay specific date.

(3)  The assumed natural gas and oil prices are the prices used for preparation
     of the Partnership's reserve report at December 31, 1994.  The continuation
     analysis was calculated based upon Benton's estimate of the remaining
     economic life of the Partnership, estimated to be 5.5 years.





                                       9
<PAGE>   297
         The actual amount that Investors would receive if the Partnership
continued its operations would depend on production levels, which cannot be
predicted with certainty. In addition, the actual amount that Investors would
receive under either of the alternatives to the Exchange would depend on future
oil and gas prices. To the extent that future prices for those commodities are
materially higher or lower than the pricing assumptions made by the Managing
General Partner, those fluctuations would likely have a similar effect on the
operating results, distribution rates and market value of the Partnership
Units, largely negating the effect of price changes on a comparison between the
Exchange and either alternative of continuing the Partnership or liquidating
its assets. In addition, Benton believes that liquidating the Partnership would
deprive Investors of the opportunity to benefit from any future upturn in oil
and gas prices.

         For a more detailed discussion of the bases for the Managing General
Partner's determination that the Exchange Offer is fair to Investors, see
"Recommendation of the Managing General Partner" contained at page 65 of the
Prospectus.

                        DETERMINATION OF EXCHANGE VALUE

         Components of the Exchange Value. The most significant assets
considered by Benton in determining the Exchange Value of the Units were the
anticipated net proceeds from the sale of the Umbrella Point Field and Proved
Reserves of the Partnership. The Exchange Values represent the sum of (i) the
estimated cash proceeds from the anticipated sale of Umbrella Point Field to
Goldking, (ii) the estimated present value of future net cash flows from the
Proved Reserves of the Partnership as of December 31, 1994, discounted at 10%
per year and calculated without escalation of prices and costs, as reflected in
the reserve report for the Partnership as of that date prepared by Benton and
audited by Huddleston & Co., Inc., independent petroleum engineers
("Huddleston"), (iii) the tax - basis balances of equipment as of December 31,
1994 and the net book value of current assets and liabilities (reflected on the
unaudited balance sheet) of the Partnership as of June 30, 1995, and (iv) the
value of General Intangibles. These components represent all of the assets and
liabilities of the Partnership and were determined as of the year end and June
30, 1995 to conform with the SEC reporting requirements for reserve information
and unaudited financial information, respectively. Since the year-end reserve
information is audited, the Exchange Values were derived from that information.

         In determining the Exchange Value, Benton considered the total
distributions paid to date to participants in the Partnership.  For the
Partnership, and each of the other Partnerships, Benton assigned a Total
Exchange Value to the Partnership which, based upon certain assumptions
described herein, and in addition to the distributions paid to date, would
provide Investors with consideration valued at 100% of their initial
contribution to the Partnership.  See " --  General Intangibles" for a
discussion of the assumptions used by Benton. The estimated cash proceeds from
the sale of the working interest in the Umbrella Point Field to Goldking and
the value of other tangible assets of the Partnership are attributable to
shares of Benton Common Stock, or cash if the Investor makes the cash election
described herein.  The remaining dollar value is


                                       10
<PAGE>   298
referred to herein as General Intangibles.  Pursuant to the Exchange Offer,
value attributed to General Intangibles will be distributed to Investors in the
form of Warrants.

         The number of shares of Common Stock and Warrants to be issued
pursuant to the Exchange Offer has been determined relative to a Total Exchange
Value assigned to the Partnership aggregating $2,990,728.  The number of shares
of Common Stock offered in exchange for Partnership Units has been determined
by dividing the Exchange Value of the tangible assets by a Common Stock price
of $11.00, subject to rounding adjustments.   The Common Stock price is based
upon the average closing price of the Common Stock on the NASDAQ National
Market for the 20 trading days immediately preceding September 12, 1995 and
will not reflect any subsequent increase or decrease in the market price for
the Common Stock after that date, except to the extent required by dissenters'
rights for California residents.  The number of Warrants to be assigned to the
Partnership was determined by dividing the estimated value of the General
Intangibles of the Partnership by the estimated present value per Warrant.
Benton has used the Black-Scholes option pricing model to calculate the present
value of the Warrants, which yielded a value of $3.64 per Warrant.  The
Warrants are exercisable at a price of $11.00 per share and will expire three
years from the date of issuance.

         The following unaudited table sets forth (i) the components of the
Exchange Values of the Units and (ii) the Exchange Value per Unit held by an
Investor. This information was compiled by Benton from the  Partnership's
reserve report as of December 31, 1994 (a summary of which is included in
Exhibit B to this Prospectus) and the Partnership's tax records for the year
ended December 31, 1994 and financial statements for the six months ended June
30, 1995.

         The following table sets forth each of the Exchange Value components,
estimated on an interim basis.

                           EXCHANGE VALUE COMPONENTS
<TABLE>
         <S>                                                                                <C>
         Estimated Cash Proceeds - Umbrella Point Field . . . . . . . . . . . . . . . . . . $  930,865
         Present value of Proved Reserves of other properties (SEC PV 10) . . . . . . . . .    119,694
         Cash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    145,455
         Intercompany payable -- Benton Oil and Gas Company . . . . . . . . . . . . . . . .    (56,281)
         Value of equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     13,037
         General Intangibles  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1,725,396
                                                                                            ----------
         Exchange Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $2,990,728
                                                                                            ==========
</TABLE>

         Anticipated Sales Proceeds. In July 1995, Benton, on behalf of the
Partnership, and Goldking executed an agreement whereby Goldking will purchase
a 14.19% working interest in the Umbrella Point Field from the Partnership,
subject to approval of the participants of the Partnership. Upon execution of
the agreement, Goldking made an earnest money deposit in favor of the
Partnership of $14,192, included as current assets of the Partnership (the
"Deposit"). Subject to closing adjustments and excluding the Deposit, as of
June 30, 1995 the Partnership's estimated cash proceeds from the sale would be
$930,865, or $656 per 1990-1 Unit. Benton has


                                       11
<PAGE>   299
made this Exchange Offer in contemplation of such sale, but the Exchange Offer
is not conditioned upon consummation of such sale.

         Proved Reserves. The calculation of the present value of the 1990-1
Partnership's Proved Reserves for the purpose of determining the Exchange Value
complies with the rules and regulations of the SEC relating to the calculation
of the present value of future net cash flows determined as of December 31,
1994 attributable to proved oil and gas reserves for disclosure and financial
reporting purposes. The regulations governing these reserves do not permit the
use of escalated prices and costs except in accordance with existing
contractual arrangements, and the resulting SEC PV 10 calculations may
overestimate or underestimate the actual future cash flows from the production
and sale of oil and gas and, consequently, the present value thereof.

         The gross quantities of Proved Reserves attributable to the 1990-1
Partnership's interest in its wells, together with the estimated present value
of those reserves, were estimated on an SEC PV 10 basis as of December 31, 1994
in a reserve report prepared by Benton and audited by Huddleston. A summary of
the report and a copy of the audit letter, setting forth the criteria and
assumptions used in evaluating the 1990-1 Partnership's Proved Reserves, are
included in Exhibit B.

         There are numerous uncertainties inherent in estimating quantities of
Proved Reserves. Huddleston audited the data and computations used by Benton's
petroleum engineer in their evaluation of the total Proved Reserves
attributable to all of the wells in which the 1990-1 Partnership had an
interest as of December 31, 1994. Estimates by other independent petroleum
engineers could vary from Benton's estimates and could result in higher or
lower valuations.

         The estimates of the 1990-1 Partnership's future gross revenues
attributable to its estimated Proved Reserves as of December 31, 1994 were
calculated based on natural gas and crude oil prices in effect on that date.
Those prices had a weighted average of $1.63 per Mcf for natural gas and $15.94
per Bbl for oil.

         Future operating and development costs were based on the 1990-1
Partnership's operating and development costs as of December 31, 1994 and were
used without escalation. Future severance (production) and ad valorem
(property) taxes were calculated using rates prevailing at December 31, 1994.
The estimated future gross revenues, future operating and development costs and
production taxes were allocated to the 1990-1 Partnership in accordance with
its interest in oil and gas properties, taking into account applicable
reversionary and overriding royalty interests.

         The present values of the estimated net cash flows attributable to the
1990-1 Partnership's Proved Reserves of other properties were calculated by
discounting the future net cash flows to present value at the rate of 10% per
year, as prescribed by SEC regulations covering reserve reporting for financial
disclosure purposes. The discount factor is intended to reflect the timing of
future net cash flows. No further discount or risk adjustment was applied.
Present value, regardless of the discount rate used, is materially affected by
assumptions as to timing of future production, which may prove to have been
inaccurate.


                                       12
<PAGE>   300
         Other Assets and Liabilities. The tax-basis balances of the 1990-1
Partnership's equipment, excluding Umbrella Point Field equipment, aggregated
$13,037 at December 31, 1994, and the net book value of its current assets and
liabilities as of June 30, 1995 reflect a balance of $201,736 after deducting
1994 distributions aggregating $93,667. The equipment value and current net
assets are based upon the 1990-1 Partnership's 1994 year-end tax accounting
records and June 30, 1995 unaudited financial statements, respectively,
maintained in accordance with the applicable provisions of the 1990-1
Partnership Agreement.

         Benton believes that valuing the 1990-1 Partnership's equipment
(comprised of oil and gas production and transportation facilities) at its 
tax-basis balances is favorable to the sellers of the producing properties 
since many purchasers in transactions evaluated by Benton, as part of its 
on-going involvement in the production area, allocate nominal value to well 
equipment on the theory that its salvage value at the end of the commercial 
lives of acquired wells will approximate the cost of plugging and abandoning 
the wells. Benton believes that the original cost of the equipment less the 
deductions computed through 1994 year end for tax purposes represents a 
reasonable approximation of the fair market value of the equipment to Benton. 
Benton also believes that valuing the current assets and liabilities of the 
1990-1 Partnership (comprised of cash and intercompany receivable) at their 
book value as of June 30, 1995 is appropriate to reflect the fair market value 
of these items, which are expected to be collected and paid to Benton, to the 
extent outstanding, in the stated amounts reflected in the 1990-1 Partnership's
unaudited balance sheet as of that date.

         General Intangibles. In determining the value attributed to General
Intangibles, Benton evaluated the success to date of the 1990-1 Partnership,
total consideration paid to date to the participants and the value to Benton of
dissolving and liquidation the 1990-1 Partnership so that Benton can focus on
its current operations and reduce the administrative burdens associated with
operating the Partnership. Based upon Benton's evaluation of historical
administrative costs for the 1990-1 Partnership, Benton estimates that the
administrative costs for operating the Partnership will be approximately
$80,000 per year.  From inception through September 1995, the 1990-1
Partnership has made cash distributions to participants aggregating $2,452,364,
or $1,728 per 1990-1 Unit. In forming the 1990-1 Partnership, Benton sold an
aggregate of $7,095,960 of 1990-1 Units.  Benton acknowledges the concerns
raised by the Investors in the 1990-1 Partnership with regard to operations
of the Partnership, the lack of success and thus the disappointing returns on
investment by the Investors. Because many of the Investors are or were
stockholders of Benton, Benton desires to maintain a good relationship with
these stockholders, many of whom have been strong supporters of Benton from
inception, and Benton desires to avoid future claims against it by participants
relating to the management of the Partnership. See "The Exchange Offer and
Proposal -- Litigation and Related Matters." Assuming that the Investor in the
1990-1 Partnership elects to hold his or her shares of Common Stock and
exercises his or her Warrants at the end of the three-year term, and the market
price of the Common Stock is at or above approximately $16.75 per share, Benton
believes that the Investors in the 1990-1 Partnership, will have received
consideration in the form of cash distributions, Common Stock and Warrants in
excess of the initial investment in the 1990-1 Partnership, without regard to
any tax benefits received by the


                                       13
<PAGE>   301
participants.  On October 2, 1995, the last sales price of the Benton Common
Stock on NASDAQ National Market was $11.13 per share.  The assumed market price
of the Common Stock of $16.75 per share discussed above represents a 34%
increase in the market value of the Benton Common Stock during the three year
term of the Warrants.  There can be no assurance that the market price of the
Benton Common Stock will increase or that such price will be achieved.  The
value of the General Intangibles of the Partnership is not subject to valuation
by third parties since the General Intangibles do not represent actual assets
of the Partnership. Benton believes that the participants in the Partnership
will not receive any value for the General Intangibles in any alternative to
the Exchange.

         Subsequent Adjustments. The Exchange Values will not be adjusted to
reflect changes after December 31, 1994 in the present value of the estimated
future net cash flows attributable to the 1990-1 Partnership's Proved
Reserves. No adjustments will be made to the Exchange Values on account of
changes in demand for or costs or prices of oil and gas that differ from the
assumptions employed or other market related events after December 31, 1994,
although those could affect the value of the 1990-1 Units.


                 COMPENSATION PAID TO MANAGING GENERAL PARTNER


         The following table sets forth the amount of compensation paid, and
cash distributions made, to the Managing General Partner and its affiliates by
the Partnership for each of the last three fiscal years and the six months
ended June 30, 1995.

<TABLE>
<CAPTION>
PERIOD                                     CASH DISTRIBUTIONS PAID              COMPENSATION PAID
- ------                                     -----------------------              -----------------
<S>                                        <C>                                  <C>
Year Ended December 31, 1994
Year Ended December 31, 1993
Year Ended December 31, 1992
Six Months Ended June 30, 1995
</TABLE>

         None of the compensation paid or cash distributions made to the
Managing General Partner by the Partnership would have been paid by the
Partnership during the periods set forth above if the Exchange Offer had been
in effect during such period.  It is anticipated that substantially all of the
assets of the Partnership will be sold to Goldking immediately following
consummation of the Exchange Offer.  If such sale is consummated, Benton will
receive cash proceeds of approximately $930,865 for the sale of the working
interest in the Umbrella Point Field as of June 30, 1995, and subject to
adjustments.  If all Investors in the Partnership elect to receive cash in lieu
of Common Stock in connection with the Exchange, Benton will receive no cash
proceeds from the sale.


                                       14
<PAGE>   302

                        CASH DISTRIBUTIONS TO INVESTORS

         The following table sets forth the cash distributions paid to
Investors for during each of the years in the five year period ended December
31, 1994, and during the six months ended June 30, 1995.  All of the
distributions represent a return of capital, unless noted.

<TABLE>
<CAPTION>
1990               1991               1992               1993              1994               1995
- ----               ----               ----               ----              ----               ----
<S>                <C>                <C>                <C>               <C>                <C>
$0                 $500               $762               $400              $66                $0
</TABLE>




         For additional financial information concerning the Partnership and
Benton, see "Information Concerning the 1990-1 Partnership - Selected
Historical Financial Data" and "Unaudited Pro Forma Financial Information"
contained in the Prospectus.





                                       15
<PAGE>   303
PROSPECTUS SUPPLEMENT
1991-1 PARTNERSHIP

                              SUBJECT TO COMPLETION
                              DATED OCTOBER 3, 1995

                                 EXCHANGE OFFER

                OF AN AGGREGATE OF 26,772 SHARES OF COMMON STOCK
     AND WARRANTS TO PURCHASE AN AGGREGATE OF 108,500 SHARES OF COMMON STOCK

                            FOR PARTNERSHIP UNITS IN

               BENTON OIL & GAS COMBINATION PARTNERSHIP 1991-1,
                        L.P. (281.8182 PARTNERSHIP UNITS)

                                  -------------
                                 EXCHANGE RATIO:

    95 SHARES OF COMMON STOCK AND 385 WARRANTS PER 1991-1 PARTNERSHIP UNIT

         This Supplement accompanies a Prospectus (the "Prospectus") and is
being furnished to the Investors ("Investors") in the Benton Oil & Gas
Combination Partnership 1991-1, L.P., a California limited partnership (the
"Partnership") in connection with the offer by Benton Oil and Gas Company, a
Delaware corporation and the managing general partner of the Partnership
("Benton," or "Company," or "Managing General Partner") to exchange shares of
Common Stock, $.01 par value of Benton ("Common Stock") and Warrants
("Warrants") to purchase shares of Common Stock of Benton (the "Exchange Offer")
for all of the right, title and interest to units of Partnership interest in the
Partnerships ("Partnership Units") held by Investors, at the exchange rate
outlined below. Benton has offered to exchange shares of Common Stock and
Warrants for all of the right, title and interest to units of partnership
interest in the Benton Oil & Gas Combination Partnership 1989-1, L.P. (the
"1989-1 Partnership") and the Benton Oil & Gas Combination Partnership 1990-1,
L.P. (the "1990-1 Partnership") on the terms and at the exchange rates set forth
in the Prospectus. A separate supplement has been prepared for each of the
Partnerships. THE EFFECTS OF THE EXCHANGE OFFER MAY BE DIFFERENT FOR INVESTORS
IN THE VARIOUS PARTNERSHIPS. UPON RECEIPT OF A WRITTEN REQUEST BY AN INVESTOR OR
HIS REPRESENTATIVE WHO HAS BEEN DESIGNATED IN WRITING, A COPY OF ANY SUPPLEMENT
WILL BE TRANSMITTED PROMPTLY, WITHOUT CHARGE, BY BENTON. ANY SUCH REQUEST SHOULD
BE FORWARDED TO THE ATTENTION OF TONI L. JACKSON, BENTON OIL AND GAS COMPANY,
1145 EUGENIA PLACE, SUITE 200, CARPENTERIA, CALIFORNIA 93013.

         Benton is offering to exchange shares of Common Stock and Warrants to
owners of Partnership Units in the 1991-1 Partnership (the "1991-1 Units") on
the basis of $5,000.00 original investment on the terms and in the amounts set
forth herein. The Warrants to be issued in connection with the Exchange Offer
are exercisable at a price of $11.00 per share and will expire three years form
the date of issuance. For detailed information regarding the determination of
the Total Exchange Values for each of the Partnerships, see "Determination of


                                       1
<PAGE>   304

Exchange Value." On October 2, 1995, the last reported sales price of the Common
Stock, as reported on NASDAQ National Market, was $11.13.

         In connection with the Exchange Offer, Benton is submitting a Proposal
to Investors in the Partnership to amend the Partnership Agreement to provide
for the transfer of all of the assets and liabilities of the Partnership to
Benton as of the December 31, 1994 Effective Date in exchange for Common Stock
and Warrants in the amounts set forth herein and the pro rata distribution of
such consideration in liquidation of the Partnership. Each Investor who tenders
his Partnership Units pursuant to the Exchange Offer will, by that tender,
consent to the Proposal.

         ADOPTION OF THE PROPOSAL REQUIRES THE CONSENT OF INVESTORS OF THE
PARTNERSHIP HOLDING 75% OF THE PARTNERSHIP UNITS. IF INVESTORS IN THE
PARTNERSHIP HOLDING NOT LESS THAN 75% OF THE PARTNERSHIP UNITS ACCEPT THE
EXCHANGE OFFER AND CONSENT TO THE PROPOSAL, ALL NON-DISSENTING HOLDERS OF UNITS
IN THE PARTNERSHIP WILL BE BOUND BY THE TERMS OF THE EXCHANGE AND PROPOSAL AND
WILL RECEIVE THE NUMBER OF SHARES OF COMMON STOCK AND WARRANTS DESCRIBED HEREIN.
A SIMILAR EXCHANGE OFFER AND PROPOSAL IS BEING OFFERED TO INVESTORS IN TWO OTHER
PARTNERSHIPS. EACH OF THE EXCHANGE OFFERS TO THE PARTNERSHIPS IS INDEPENDENT OF
THE EXCHANGE OFFER TO THE OTHER PARTNERSHIPS. THE EXCHANGE WILL ONLY BE
CONSUMMATED FOR THE PARTNERSHIP IF THE PROPOSAL HAS BEEN APPROVED BY THE
INVESTORS. BENTON OIL AND GAS COMPANY, IN ADDITION TO BEING MANAGING GENERAL
PARTNER OF THE THREE PARTNERSHIPS, OWNS 2.812 1991-1 UNITS AND WILL VOTE SUCH
UNITS THE SAME AS A MAJORITY OF INVESTORS VOTE THEIR UNITS. INVESTORS WILL
RECEIVE THE CONSIDERATION SET FORTH HEREIN, AND THE RESPECTIVE PARTNERSHIP WILL
BE DISSOLVED.

         ASSUMING CONSUMMATION OF THE EXCHANGE OFFER, ALL OF THE INVESTORS IN
THE PARTNERSHIP, WHETHER OR NOT THEY TENDER THEIR UNITS AND THUS VOTE IN FAVOR
OF THE PROPOSAL, WILL RECEIVE THE SAME NUMBER OF SHARES OF COMMON STOCK AND
WARRANTS AS THEY WOULD HAVE RECEIVED HAD THEY TENDERED THEIR PARTNERSHIP UNITS
AND THE PARTNERSHIP WILL BE DISSOLVED.

         THE EXCHANGE OFFER INVOLVES VARIOUS RISKS THAT SHOULD BE CONSIDERED BY
INVESTORS. SEE "RISK FACTORS AND MATERIAL CONSIDERATIONS," BEGINNING ON PAGE 4
OF THIS SUPPLEMENT. IN PARTICULAR, INVESTORS SHOULD CONSIDER THE FOLLOWING
FACTORS:

           -   INVESTORS HAD RECEIVED CASH DISTRIBUTIONS FROM THE PARTNERSHIP,
               BUT WILL RECEIVE NO CASH DISTRIBUTIONS OR DIVIDENDS IN THE
               FORESEEABLE FUTURE FROM BENTON.

           -   THE MARKET PRICE OF THE COMMON STOCK COULD DECLINE BELOW THE
               MARKET PRICE USED FOR CALCULATION OF THE EXCHANGE RATES, EXPOSING
               INVESTORS TO A REDUCED RETURN ON THEIR INVESTMENT.

           -   THE EXCHANGE VALUE OF THE PARTNERSHIP UNITS WAS DETERMINED BY
               BENTON, WHICH HAS INHERENT CONFLICTS OF INTEREST, AND MAY NOT
               REFLECT THE VALUE OF THE NET ASSETS OF THE PARTNERSHIP IF SOLD TO
               AN UNAFFILIATED THIRD PARTY IN AN ARM'S LENGTH TRANSACTION.

           -   BENTON HAS ATTRIBUTED A PRESENT VALUE TO THE WARRANTS, USING THE
               BLACK-SCHOLES OPTION PRICING MODEL. HOWEVER, THE ACTUAL VALUE,
               IF ANY, A HOLDER MAY REALIZE 


                                       2

<PAGE>   305



               FROM THE WARRANTS WILL DEPEND ON THE EXCESS OF THE MARKET PRICE
               OF THE COMMON STOCK OVER THE EXERCISE PRICE OF THE WARRANT ON THE
               DATE THE WARRANT IS EXERCISED.

           -   BENTON'S DETERMINATIONS OF THE EXCHANGE VALUES WERE BASED
               PRIMARILY ON THE ESTIMATED PRESENT VALUE OF THE PARTNERSHIP'S
               PROVED OIL AND GAS RESERVES, WHICH INVOLVES MANY UNCERTAINTIES
               AND COULD RESULT IN AN UNDERVALUATION OF PARTNERSHIP UNITS.
               ALTHOUGH SUPPORTED BY AN INDEPENDENT OFFER FOR THE PURCHASE OF
               SUBSTANTIALLY ALL OF THE ASSETS OF THE PARTNERSHIP, THERE CAN BE
               NO ASSURANCE THAT THE EXCHANGE VALUE REPRESENTS THE VALUE THE
               PARTNERSHIP COULD RECEIVE IN THE SALE OF THE ASSETS OF THE
               PARTNERSHIP.

           -   THE ALTERNATIVES OF CONTINUING THE PARTNERSHIP OR LIQUIDATING ITS
               ASSETS COULD POTENTIALLY BE MORE BENEFICIAL TO INVESTORS THAN THE
               EXCHANGE OFFER.

           -   NO INDEPENDENT REPRESENTATIVE WAS ENGAGED TO REPRESENT THE
               UNAFFILIATED INVESTORS IN NEGOTIATING THE TERMS OF THE EXCHANGE
               OFFER, WHICH MAY BE INFERIOR TO THOSE THAT COULD HAVE BEEN
               NEGOTIATED BY AN INDEPENDENT REPRESENTATIVE.

           -   INVESTORS HAVE NO DISSENTER'S RIGHTS IN THE EXCHANGE OFFER, OTHER
               THAN LIMITED DISSENTERS' RIGHTS FOR CALIFORNIA RESIDENTS, AND
               THEREFORE CANNOT ELECT TO RECEIVE CASH FOR THEIR PARTNERSHIP
               UNITS.

           -   OWNERSHIP OF COMMON STOCK MAY INVOLVE GREATER RISK THAN AN
               INVESTMENT IN THE PARTNERSHIP UNITS BECAUSE OF BENTON'S BROADER
               OPERATIONS, INCLUDING FOREIGN OPERATIONS, AND ITS USE OF DEBT TO
               FINANCE ONGOING OPERATIONS.

           -   FUTURE EQUITY OFFERINGS BY BENTON COULD POTENTIALLY BE DILUTIVE
               TO INVESTORS HOLDING COMMON STOCK OR WARRANTS.

         The Exchange may be withdrawn at any time prior to its scheduled
expiration date if Benton reasonably determines that a material change affecting
the Partnership or the Company has occurred. THE EXCHANGE WILL ONLY BE
CONSUMMATED IF THE PROPOSAL HAS BEEN APPROVED BY THE INVESTORS. The assets and
liabilities of the Partnership, if the Proposal is approved and the Exchange
Offer is accepted, will be transferred to Benton effective as of December 31,
1994 (the "Effective Date").

THE EXCHANGE OFFER EXPIRES AT 5:00 P.M. PACIFIC TIME ON ____________, 1995
UNLESS EXTENDED.

             ------------------------------------------------------
THE SHARES OF COMMON STOCK AND WARRANTS TO BE ISSUED IN CONNECTION WITH THE
EXCHANGE HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND EXCHANGE
COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE ACCURACY
OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL
OFFENSE.

               THE DATE OF THIS SUPPLEMENT IS ____________, 1995.


                                       3

<PAGE>   306

The information contained in this Supplement is being provided to Investors in
the Benton Oil & Gas Combination Partnership 1991-1, L.P. (the "Partnership").
The information contained in this Supplement is not intended to be a complete
description of all matters covered in the Prospectus, and Investors are
encouraged to review all information set forth in the Prospectus.

                    RISK FACTORS AND MATERIAL CONSIDERATIONS

         The Exchange Offer. In addition to the information included in this
Supplement and the Prospectus, the Investors should carefully consider the
following factors in determining whether to accept the Exchange Offer and
consent to the Proposal. The risk factors summarized below are described in
further detail elsewhere in the Prospectus at "Risk Factors and Material
Considerations," beginning at page 34.

         Lack of Arm's Length Negotiations and Uncertainties in the Method of
         Determining Exchange Values. The Exchange Value was determined by
         Benton, based in part on an offer for the purchase of substantially all
         of the assets of the Partnership from an unaffiliated third party
         (Goldking Trinity Bay Corp.), but may not reflect the actual value of
         the net assets of the Partnership. The primary assets of the
         Partnership considered by Benton when determining the Exchange Value
         were the proved oil and gas reserves of the Partnership (the "Proved
         Reserves") and the present value of associated future net cash flow as
         of December 31, 1994, as well as the offer to purchase the Umbrella
         Point Field by Goldking, described herein and in the Prospectus. There
         are many uncertainties inherent in estimating quantities of Proved
         Reserves, and the present value attributed to the Partnership's Proved
         Reserves may be less than the future net cash flows actually received
         from the Partnership's interest in its wells. In that event, the use of
         this valuation methodology will have resulted in an undervaluation of
         the Partnership Units. See "Method of Determining Exchange Values."

         Potential Decline in Market Price of Common Stock. Access to an active
         trading market by exchanging Investors may result in a relatively large
         number of shares of Common Stock offered for sale immediately after the
         Closing Date. This may tend to lower the market price for the Common
         Stock. Future market conditions in the oil and gas industry in general
         or the effect of the conditions on Benton in particular could also
         adversely affect the market price of the Common Stock and thus the
         value of the Warrants. There can be no assurance regarding the
         potential appreciation in the market price of the Common Stock. Any
         decline in the market price of the Common Stock could reduce the
         Investor's return on investment or increase the loss on the Investor's
         original investment.

         Potential Benefits of Alternatives to the Exchange. The alternatives to
         the Exchange Offer are the continuation of the Partnership or the
         liquidation of the Partnership's assets and distribution of the
         liquidation proceeds to Investors, either of which could potentially be


                                       4

<PAGE>   307

         more beneficial to Investors than the Exchange by avoiding the risks
         associated with ownership of Benton Common Stock and, in the case of a
         liquidation of the Partnership, by providing an immediate cash return
         to Investors. See "Recommendation of the Managing General Partner --
         Managing General Partner's Determination that Exchange Offer is Fair --
         Alternatives to the Exchange" contained in the Prospectus.

         Lack of Independent Representatives for Investors; No Fairness Opinion.
         No independent representative was selected or hired to represent the
         interests of the Investors in negotiating the terms of the Exchange
         Offer. The Exchange Values and other terms of the Exchange Offer may
         therefore be inferior to those that could have been negotiated by an
         independent representative. Benton did not retain an independent third
         party to render an opinion regarding the fairness of the terms of the
         Exchange Offer to the Investors.

         Limited Dissenters' Rights. Investors who are California residents and
         who oppose the Proposal will have limited dissenters' rights. Other
         Investors who oppose the Proposal will have no dissenters' rights or
         appraisal rights, and therefore, no option to receive cash based on a
         separate appraisal of the Partnership assets in lieu of the Common
         Stock and Warrants based on the Exchange Values determined by Benton.
         The Managing General Partner could have provided all Investors with
         appraisal rights in structuring the Exchange Offer but elected not to
         do so, primarily because such rights are not provided for in the
         Partnership Agreements. The absence of these rights limit the options
         that would otherwise be available to Investors opposing the Exchange
         Offer.

         Effect of Dissenters' Rights on California Investors. Investors
         residing in California will be afforded limited dissenters' rights in
         accordance with the requirements for roll-up transactions under the
         California Code. By voting against the Proposal, Investors in the State
         of California will be deemed to exercise their dissenters' rights and
         will receive the number of shares of Common Stock and Warrants equal to
         the Exchange Value of their interests divided by the closing price of
         the Common Stock on the NASDAQ - National Market during the twenty days
         immediately after the Closing Date. If that average price is lower than
         the Exchange Price, dissenting California Investors will receive more
         shares of Common Stock than they would otherwise receive in the
         Exchange Offer. If, however, the average price is higher than the
         Exchange Price, a dissenting California Investor would receive fewer
         shares of Common Stock and Warrants. California Investors hold a
         substantial portion of the interests in the Partnership, and the impact
         of the exercise of dissenters' rights could materially increase the
         number of shares of Common Stock issued by Benton in connection with
         the Exchange Offer.

         Conflicts of Interest of Benton. Benton is the Managing General Partner
         of the Partnership and its determination of the Exchange Value involves
         an inherent conflict of interest. As Managing General Partner, Benton
         owes fiduciary duties to the Investors in the Partnership. In addition,
         it owes a duty to its stockholders. While Benton believes that it has
         fulfilled these obligations in its determination of the Exchange Value,
         which is supported, in part, by a reserve report audited by an
         independent petroleum engineer, no degree of objectivity or
         professional competence can eliminate the inherent conflict of


                                       5

<PAGE>   308

         interest. See "Recommendations of the Managing General Partner --
         Fiduciary Duties of Benton" contained in the Prospectus.

         Benton Dividend Policy. Benton's policy is to retain its earnings to
         support the growth of Benton's business. Accordingly, the Board of
         Directors of Benton has never declared cash dividends on its Common
         Stock and does not plan to do so in the foreseeable future.
         Furthermore, the terms of Benton's debt agreements prohibit Benton from
         paying cash dividends on its Common Stock. Thus, upon consummation of
         the Exchange, Investors will no longer receive cash distributions and
         it is unlikely that cash dividends will be paid on the Benton Common
         Stock at any time in the foreseeable future.

         No Fractional Shares. No fractional shares will be issued in connection
         with the Exchange Offer. An Investor who would otherwise be entitled to
         a fractional share of Common Stock will be paid cash in lieu of such
         fractional shares. Warrants issued in connection with the Exchange
         Offer will be rounded to the nearest whole number of Warrants and no
         fractional interest will be issued.

         Risks Associated with Ownership of Common Stock of Benton. In addition
to the information included in this Supplement and the Prospectus, the Investors
should carefully consider the following factors related to Benton in determining
whether to accept the Exchange Offer. The risk factors summarized below are
described in further detail in the Prospectus at "Risk Factors and Material
Considerations."

         Losses From Benton's Operations. The historical financial data for
         Benton reflects net losses and decreased revenues for the years ended
         December 31, 1992 and 1993. Benton's ability to maintain its financing
         arrangements, produce its oil and gas reserves and service its debt
         obligations would be adversely affected by a lack of profitability.

         Foreign Operations. Almost all of Benton's oil and gas revenues and
         Proved Reserves are attributable to its operations in Venezuela and
         Russia. Benton's Venezuelan and Russian operations are subject to
         political, economic and other uncertainties inherent in the development
         of foreign properties.

         Properties Under Development. A substantial amount of Benton's Proved
         Reserves are undeveloped and require development activities and/or are
         proved developed behind-pipe or shut-in and require additional
         development activities. As a result, Benton will require substantial
         capital expenditures to develop all of its Proved Reserves.

         Engineers' Estimates of Reserves and Future Net Revenue. This
         Prospectus contains, and incorporates by reference, estimates of
         Benton's and the Partnerships' oil and gas reserves and future net
         revenues therefrom. Estimates of commercially recoverable oil and gas
         and the future net cash flows derived therefrom are based upon a number
         of variable factors and assumptions. Estimates to some degree are
         speculative and estimates of the commercially recoverable reserves of
         oil and natural gas, and the future net cash flows therefrom, prepared
         by different engineers or by the same engineer at different


                                       6

<PAGE>   309



         times, may vary substantially. The difficulty of making precise
         estimates is accentuated because most of Benton's Proved Reserves were
         non-producing at December 31, 1994.

         Development of Additional Reserves. Benton's future success may also
         depend upon its ability to find or acquire additional oil and gas
         reserves that are economically recoverable. There can be no assurance
         that Benton will be able to discover additional commercial quantities
         of oil and gas, or that Benton will be able to continue to acquire
         interests in underdeveloped oil and gas fields and enhance production
         and reserves therefrom.

         Partnership Litigation. Certain limited partners in Benton's oil and
         gas limited partnerships, including the Partnerships that are the
         subject of this Exchange Offer, filed suit against Benton and others
         alleging breaches of contract, fiduciary duty and fraud. This suit has
         been voluntarily dismissed, subject to an agreement among the parties
         to arbitrate the issues and claims which were the subject of the claim.
         See "The Exchange Offer and Proposal -- Litigation and Related
         Matters."

         In addition, Investors in partnerships which were sponsored by a third
         party have sued Benton on the theory that since it provided oil and gas
         drilling prospects to those partnerships and operated substantially all
         of their properties, it was responsible for alleged violations of
         securities laws in connection with the offer and sale of interests,
         contractual breach of fiduciary duty and fraud. See "The Exchange Offer
         and Proposal --Litigation and Related Matters."

         Retention and Attraction of Key Personnel. Benton depends to a large
         extent on the abilities and continued participation of certain key
         employees, the loss of whose services could have a material adverse
         effect on Benton's business.

         Regulation. The oil and gas industry is subject to broad and frequently
         changing regulations that could adversely affect the operations of
         Benton.

         In spite of the foregoing risks, Benton initiated and proposed the
Exchange Offer and recommends adoption of the Proposal by the Partnership to
enable Benton to acquire the assets and liabilities of the Partnership and to
provide Investors with the potential benefits summarized in the Prospectus under
the caption "Reasons for the Exchange Offer."

          MANAGING GENERAL PARTNER'S DETERMINATION THAT EXCHANGE OFFER
                                     IS FAIR

         THE MANAGING GENERAL PARTNER OF THE PARTNERSHIP HAS DETERMINED THAT THE
EXCHANGE IS FAIR AND IS IN THE BEST INTERESTS OF THE PARTNERSHIP AND ITS
PARTNERS AND HAS RECOMMENDED THAT THE PARTNERS OF THE PARTNERSHIP TENDER THEIR
PARTNERSHIP UNITS AND CONSENT TO THE PARTNERSHIP PROPOSAL. THE EXCHANGE OFFER IS
NOT CONDITIONED UPON ACCEPTANCE AND APPROVAL BY ALL OF THE PARTNERSHIPS AND THE
MANAGING GENERAL PARTNER BELIEVES THAT THE OFFER IS FAIR TO ALL


                                       7

<PAGE>   310


INVESTORS, REGARDLESS OF WHICH OR THE NUMBER OF PARTNERSHIPS WHICH ACCEPT THE
EXCHANGE OFFER FOR THE REASONS SET FORTH BELOW.

                  General. The Managing General Partner has analyzed the terms
of the Exchange Offer, the consideration and value offered to the Investors in
exchange for their Partnership Units and the value of consideration an Investor
could expect to receive under various alternatives to the Exchange. In
determining that the Exchange Offer is fair to the Investors, the Managing
General Partner considered that the Investors who do not accept the Exchange
Offer or who do not elect to receive cash in lieu of Benton Common Stock will
receive Common Stock and Warrants of Benton, and could receive cash if the
Partnership was continued or liquidated. However, the Managing General Partner
believes that because an Investor may elect to receive cash in lieu of Common
Stock if the sale to Goldking is consummated, the Investors will receive
consideration in excess of the alternatives to the Exchange if the Exchange
Offer is accepted. The Managing General Partner's analysis of the consideration
an Investor could receive under the alternatives to the Exchange are discussed
below. The Managing General Partner believes that those Investors who receive
Benton Common Stock will have access to a public trading market if such Investor
elects to liquidate his investment for cash. The average daily trading volume
for the Benton Common Stock on the NASDAQ National Market for the 30 trading
days ended September 27, 1995 was 259,000 shares. The Managing General Partner
believes that since the maximum aggregate number of shares of Benton Common
Stock that will be issued in the Exchange Offer for all three Partnerships is
171,880, the issuance will have no material effect on the market value of the
Benton Common Stock, and may allow all Investors receiving shares of Benton
Common Stock in connection with the Exchange Offer and liquidation of the
Partnerships to liquidate their investment in the market.

         Alternatives to the Exchange. The Managing General Partner's analysis
of the most probable results of continuing the Partnership indicate that, while
continuing the Partnership would avoid the risks associated with the ownership
of Common Stock in Benton, Investors will receive potentially greater values by
participating in the Exchange than the values they would derive from this
alternative. Benton estimates that continuing the 1990-1 Partnership under
market and operating conditions prevailing in 1994 would likely generate
decreasing annual distributions of $61 per 1991-1 Unit in 1995, $83 in 1996, $40
in 1997, and $0 in 1998. Benton estimates that the remaining economic life of
the 1991-1 Partnership is 2.5 years. Benton believes that the Partnership will
have no residual value in its assets at the end of the economic life of the
Partnership.

         The Managing General Partner also believes that, while liquidating the
Partnership would provide an immediate cash return and avoid the risks
associated with owning Benton Common Stock, the Exchange will provide Investors
with greater values than they would likely receive in liquidation of the
Partnership. Benton's liquidation analysis reflects an estimated liquidation
value of approximately $240,998 of the 1991 - 1 Partnership, or $855 per Unit.
Benton received an independent offer from Goldking to purchase the Partnership's
interest in the Umbrella Point Field (which represents 88.0% of the total Proved
Reserves of the Partnership) for an estimated total purchase price in cash of
$185,282 as of June 30, 1995, subject to adjustments. This


                                       8

<PAGE>   311



estimated purchase price would represent potential cash distributions to the
Investors equal to $657 per Unit. Benton's liquidation analysis is based on the
anticipated proceeds from the sale of the Umbrella Point Field to Goldking, plus
working capital for the Partnership at June 30, 1995, less estimated general and
administrative costs involved in liquidation of the Partnership. For purposes of
determining the general and administrative costs to the Partnership, Benton
estimated that general and administrative expenses would approximate the general
and administrative expenses incurred by the Partnership during the year ended
December 31, 1994.

         The following table summarizes the results of Benton's liquidation
analysis in comparison to the Exchange Values for the Partnership Units
determined by Benton. The table also includes valuation data derived from
Benton's analysis of continuing the Partnership. Benton did not undertake its
continuation analysis for the purpose of valuing the Partnership, but solely to
illustrate the likelihood of decreasing distributions based on oil and gas
prices at December 31, 1994. However, because SEC disclosure standards for roll
up transactions require a comparison of the value of the consideration offered
in the transaction with the value of the consideration estimated for each
alternative to the transaction, the tables also reflect the results of extending
Benton's continuation analysis for the balance of the estimated life of the
Partnership's Proved Reserves, and discounting the projected stream of
distributions to present value at the same 10% discount rate used in Benton's
liquidation analysis to account for the timing of cash flows as well as
production and concentration risks.

<TABLE>
<CAPTION>
VALUATION METHOD                                           TOTAL                VALUE PER
- ----------------                                       INVESTOR VALUE(1)      1991 - 1 UNIT
                                                       -----------------      -------------
<S>                                                    <C>                    <C>
Exchange Value .....................................       $692,349               $2,457
Liquidation value estimated by Benton ..............        240,998                  855
Value of Proved Reserves at December 31,                                               
    1994 (2) .......................................        210,445                  747                                 

Continuation analysis by Benton assuming
    natural gas prices of $1.63 per Mcf and oil
    prices of $15.94 per Bbl(3) ....................         47,072                  167
</TABLE>


(1) The Exchange Value and liquidation value attribute no value to Managing
    General Partners' interests. The continuation analysis assumes continued
    distributions to the Managing General Partner pursuant to the terms of the
    Partnership Agreement.

(2) Based on the Partnership's December 31, 1994 reserve report prepared by the
    Company and audited by Huddleston. The reserves are valued as of December 31
    of each year, based on oil and gas prices as of that date. Market prices for
    both oil and natural gas are subject to a significant degree of variation,
    and this variation will effect the calculation of future net cash flows by
    the Partnership at any specific date.

(3) The assumed natural gas and oil prices are the prices used for preparation
    of the Partnership's reserve report at December 31, 1994. The continuation
    analysis was calculated based upon Benton's estimate of the remaining
    economic life of the Partnership, estimated to be 2.5 years.


                                       9

<PAGE>   312



         The actual amount that Investors would receive if the Partnership
continued its operations would depend on production levels, which cannot be
predicted with certainty. In addition, the actual amount that Investors would
receive under either of the alternatives to the Exchange would depend on future
oil and gas prices. To the extent that future prices for those commodities are
materially higher or lower than the pricing assumptions made by the Managing
General Partner, those fluctuations would likely have a similar effect on the
operating results, distribution rates and market value of the Partnership Units,
largely negating the effect of price changes on a comparison between the
Exchange and either alternative of continuing the Partnership or liquidating its
assets. In addition, Benton believes that liquidating the Partnership would
deprive Investors of the opportunity to benefit from any future upturn in oil
and gas prices.

         For a more detailed discussion of the bases for the Managing General
Partner's determination that the Exchange Offer is fair to Investors, see
"Recommendation of the Managing General Partner" contained at page 65 of the
Prospectus.

                         DETERMINATION OF EXCHANGE VALUE

         Components of the Exchange Value. The most significant assets
considered by Benton in determining the Exchange Value of the Units were the
anticipated net proceeds from the sale of the Umbrella Point Field and Proved
Reserves of the Partnership. The Exchange Values represent the sum of (i) the
estimated cash proceeds from the anticipated sale of Umbrella Point Field to
Goldking, (ii) the estimated present value of future net cash flows from the
Proved Reserves of the Partnership as of December 31, 1994, discounted at 10%
per year and calculated without escalation of prices and costs, as reflected in
the reserve report for the Partnership as of that date prepared by Benton and
audited by Huddleston & Co., Inc., independent petroleum engineers
("Huddleston"), (iii) the tax-basis balances of equipment as of December 31,
1994 and the net book value of current assets and liabilities (reflected on the
unaudited balance sheet) of the Partnership as of June 30, 1995, and (iv) the
value of General Intangibles. These components represent all of the assets and
liabilities of the Partnership and were determined as of the year end and June
30, 1995 to conform with the SEC reporting requirements for reserve information
and unaudited financial information, respectively. Since the year-end reserve
information is audited, the Exchange Values were derived from that information.

         In determining the Exchange Value, Benton considered the total
distributions paid to date to participants in the Partnership. For the
Partnership, and each of the other Partnerships, Benton assigned a Total
Exchange Value to the Partnership which, based upon certain assumptions
described herein, and in addition to the distributions paid to date, would
provide Investors with consideration valued at 100% of their initial
contribution to the Partnership. See " -- General Intangibles" for a discussion
of the assumptions used by Benton. The estimated cash proceeds from the sale of
the working interest in the Umbrella Point Field to Goldking and the value of
other tangible assets of the Partnership are attributable to shares of Benton
Common Stock, or cash if the Investor makes the cash election described herein.
The remaining dollar value is referred to herein as General Intangibles.
Pursuant to the Exchange Offer, value attributed to General Intangibles will be
distributed to Investors in the form of Warrants.


                                       10

<PAGE>   313

         The number of shares of Common Stock and Warrants to be issued pursuant
to the Exchange Offer has been determined relative to a Total Exchange Value
assigned to the Partnership aggregating $692,349. The number of shares of Common
Stock offered in exchange for Partnership Units has been determined by dividing
the Exchange Value of the tangible assets by a Common Stock price of $11.00,
subject to rounding adjustments. The Common Stock price is based upon the
average closing price of the Common Stock on the NASDAQ National Market for the
20 trading days immediately preceding September 12, 1995 and will not reflect
any subsequent increase or decrease in the market price for the Common Stock
after that date, except to the extent required by dissenters' rights for
California residents. The number of Warrants to be assigned to the Partnership
was determined by dividing the estimated value of the General Intangibles of the
Partnership by the estimated present value per Warrant. Benton has used the
Black-Scholes option pricing model to calculate the present value of the
Warrants, which yielded a value of $3.64 per Warrant. The Warrants are
exercisable at a price of $11.00 per share and will expire three years from the
date of issuance.

         The following unaudited table sets forth (i) the components of the
Exchange Values of the Units and (ii) the Exchange Value per Unit held by an
Investor. This information was compiled by Benton from the Partnership's reserve
report as of December 31, 1994 (a summary of which is included in Exhibit B to
this Prospectus) and the Partnership's tax records for the year ended December
31, 1994 and financial statements for the six months ended June 30, 1995.

         The following table sets forth each of the Exchange Value components,
estimated on an interim basis.

                                             EXCHANGE VALUE COMPONENTS

<TABLE>
<S>                                                                           <C>     
         Estimated Cash Proceeds - Umbrella Point Field .................     $185,282
         Present value of Proved Reserves of other properties (SEC PV 10)       23,856
         Cash ...........................................................       82,547
         Intercompany receivable -- Benton Oil and Gas Company ..........        3,169
         Value of equipment .............................................        2,555
         General Intangibles ............................................      394,940
                                                                              --------
         Exchange Value .................................................     $692,349
                                                                              ========
</TABLE>


         Anticipated Sales Proceeds. In July 1995, Benton, on behalf of the
Partnership, and Goldking executed an agreement whereby Goldking will purchase a
2.83% working interest in the Umbrella Point Field from the Partnership, subject
to approval of the participants of the Partnership. Upon execution of the
agreement, Goldking made an earnest money deposit in favor of the Partnership in
the amount of $2,824, included as current assets of the Partnership (the
"Deposit"). Subject to closing adjustments and excluding the Deposit, as of June
30, 1995 the Partnership's estimated cash proceeds from the sale would be
$185,282, or $657 per 1991 - 1 Unit. Benton has made this Exchange Offer in
contemplation of such sale, but the Exchange Offer is not conditioned upon
consummation of such sale.


                                       11
<PAGE>   314

         Proved Reserves. The calculation of the present value of the 1991 - 1
Partnership's Proved Reserves for the purpose of determining the Exchange Value
complies with the rules and regulations of the SEC relating to the calculation
of the present value of future net cash flows determined as of December 31, 1994
attributable to proved oil and gas reserves for disclosure and financial
reporting purposes. The regulations governing these reserves do not permit the
use of escalated prices and costs except in accordance with existing contractual
arrangements, and the resulting SEC PV 10 calculations may overestimate or
underestimate the actual future cash flows from the production and sale of oil
and gas and, consequently, the present value thereof.

         The gross quantities of Proved Reserves attributable to the 1991 - 1
Partnership's interest in its wells, together with the estimated present value
of those reserves, were estimated on an SEC PV 10 basis as of December 31, 1994
in a reserve report prepared by Benton and audited by Huddleston. A summary of
the report and a copy of the audit letter, setting forth the criteria and
assumptions used in evaluating the 1991 - 1 Partnership's Proved Reserves, are
included in Exhibit B.

         There are numerous uncertainties inherent in estimating quantities of
Proved Reserves. Huddleston audited the data and computations used by Benton's
petroleum engineer in their evaluation of the total Proved Reserves attributable
to all of the wells in which the 1991 - 1 Partnership had an interest as of
December 31, 1994. Estimates by other independent petroleum engineers could vary
from Benton's estimates and could result in higher or lower valuations.

         The estimates of the 1991 - 1 Partnership's future gross revenues
attributable to its estimated Proved Reserves as of December 31, 1994 were
calculated based on natural gas and crude oil prices in effect on that date.
Those prices had a weighted average of $1.63 per Mcf for natural gas and $15.94
per Bbl for oil.

         Future operating and development costs were based on the 1991 - 1
Partnership's operating and development costs as of December 31, 1994 and were
used without escalation. Future severance (production) and ad valorem (property)
taxes were calculated using rates prevailing at December 31, 1994. The estimated
future gross revenues, future operating and development costs and production
taxes were allocated to the 1991 - 1 Partnership in accordance with its interest
in oil and gas properties, taking into account applicable reversionary and
overriding royalty interests.

         The present values of the estimated net cash flows attributable to the
1991 - 1 Partnership's Proved Reserves of other properties were calculated by
discounting the future net cash flows to present value at the rate of 10% per
year, as prescribed by SEC regulations covering reserve reporting for financial
disclosure purposes. The discount factor is intended to reflect the timing of
future net cash flows. No further discount or risk adjustment was applied.
Present value, regardless of the discount rate used, is materially affected by
assumptions as to timing of future production, which may prove to have been
inaccurate.

         Other Assets and Liabilities. The tax-basis balances of the 1991 - 1
Partnership's equipment, excluding Umbrella Point Field equipment, aggregated
$2,555 at December 31, 

                                       12
<PAGE>   315

1994, and the net book value of its current assets and liabilities as of June
30, 1995 reflect a balance of $85,716, excluding property held for sale. The
equipment value and current net assets are based upon the 1991 - 1 Partnership's
1994 year-end tax accounting records and June 30, 1995 unaudited financial
statements, respectively, maintained in accordance with the applicable
provisions of the 1991 - 1 Partnership Agreement.

         Benton believes that valuing the 1991 - 1 Partnership's equipment
(comprised of oil and gas production and transportation facilities) at its tax-
basis balances is favorable to the sellers of the producing properties since
many purchasers in transactions evaluated by Benton, as part of its on-going
involvement in the production area, allocate nominal value to well equipment on
the theory that its salvage value at the end of the commercial lives of acquired
wells will approximate the cost of plugging and abandoning the wells. Benton
believes that the original cost of the equipment less the deductions computed
through 1994 year end for tax purposes represents a reasonable approximation of
the fair market value of the equipment to Benton. Benton also believes that
valuing the current assets and liabilities of the 1991 - 1 Partnership
(comprised of cash and intercompany receivable) at their book value as of June
30, 1995 is appropriate to reflect the fair market value of these items, which
are expected to be collected and paid to Benton, to the extent outstanding, in
the stated amounts reflected in the 1991 - 1 Partnership's unaudited balance
sheet as of that date.

         General Intangibles. In determining the value attributed to General
Intangibles, Benton evaluated the success to date of the 1991 - 1 Partnership,
total consideration paid to date to the participants and the value to Benton of
dissolving and liquidation the 1991 - 1 Partnership so that Benton can focus on
its current operations and reduce the administrative burdens associated with
operating the Partnership. Based upon Benton's evaluation of historical
administrative costs for the 1991-1 Partnership, Benton estimates that the
administrative costs for operating the Partnership will be approximately $30,000
per year. From inception through September 1995, the 1991-1 Partnership has made
cash distributions to participants aggregating $338,182, or $1,200 per 1991 - 1
Unit. In forming the Partnership, Benton sold an aggregate of $1,409,091 in
1991-1 Units. Benton acknowledges the concerns raised by the Investors in the
1991 - 1 Partnership with regard to operations of the Partnership, the lack of
success and thus the disappointing returns on investment by the Investors.
Because many of the Investors are or were stockholders of Benton, Benton desires
to maintain a good relationship with these stockholders, many of whom have been
strong supporters of Benton from inception, and Benton desires to avoid future
claims against it by participants relating to the management of the Partnership.
See "The Exchange Offer and Proposal -- Litigation and Related Matters."
Assuming that the Investor in the 1991 - 1 Partnership elects to hold his or her
shares of Common Stock and exercises his or her Warrants at the end of the
three-year term, and the market price of the Common Stock is at or above
approximately $16.75 per share, Benton believes that the Investors in the 1991 -
1 Partnership, will have received consideration in the form of cash
distributions, Common Stock and Warrants in excess of the initial investment in
the 1991 - 1 Partnership, without regard to any tax benefits received by the
participants. On October 2, 1995, the last sales price of the Benton Common
Stock on NASDAQ National Market was $11.13 per share. The assumed market price
of the Common Stock of $16.75 per share discussed above represents a 34%
increase in the market value of the Benton Common Stock during the three year
term of the Warrants. There can be no assurance that the market price 


                                       13
<PAGE>   316

of the Benton Common Stock will increase or that such price will be achieved.
The value of the General Intangibles of the Partnership is not subject to
valuation by third parties since the General Intangibles do not represent actual
assets of the Partnership. Benton believes that the participants in the
Partnership will not receive any value for the General Intangibles in any
alternative to the Exchange.

         Subsequent Adjustments. The Exchange Values will not be adjusted to
reflect changes after December 31, 1994 in the present value of the estimated
future net cash flows attributable to the 1991 - 1 Partnership's Proved
Reserves. No adjustments will be made to the Exchange Values on account of
changes in demand for or costs or prices of oil and gas that differ from the
assumptions employed or other market related events after December 31, 1994,
although those could affect the value of the 1991 - 1 Units.

                  COMPENSATION PAID TO MANAGING GENERAL PARTNER

         The following table sets forth the amount of compensation paid, and
cash distributions made, to the Managing General Partner and its affiliates by
the Partnership for each of the last three fiscal years and the six months ended
June 30, 1995.

<TABLE>
<CAPTION>
PERIOD                                         CASH DISTRIBUTIONS PAID                   COMPENSATION PAID
- ------                                         -----------------------                   -----------------
<S>                                            <C>                                       <C>
Year Ended December 31, 1994
Year Ended December 31, 1993
Year Ended December 31, 1992
Six Months Ended June 30, 1995
</TABLE>

         None of the compensation paid or cash distributions made to the
Managing General Partner by the Partnership would have been paid by the
Partnership during the periods set forth above if the Exchange Offer had been in
effect during such period. It is anticipated that substantially all of the
assets of the Partnership will be sold to Goldking immediately following
consummation of the Exchange Offer. If such sale is consummated, Benton will
receive cash proceeds of approximately $185,282 for the sale of the working
interest in the Umbrella Point Field as of June 30, 1995, and subject to
adjustments. If all Investors in the Partnership elect to receive cash in lieu
of Common Stock in connection with the Exchange, Benton will receive no cash
proceeds from the sale.

                         CASH DISTRIBUTIONS TO INVESTORS

         The following table sets forth the cash distributions paid to Investors
for during each of the years in the five year period ended December 31, 1994,
and during the six months ended June 30, 1995. All of the distributions
represent a return of capital, unless noted.



                                       14
<PAGE>   317

<TABLE>
<CAPTION>
1990                   1991                  1992                  1993                  1994                  1995
- ----                   ----                  ----                  ----                  ----                  ----
<S>                    <C>                   <C>                   <C>                   <C>                   <C>
N/A                    $100                  $400                  $400                  $300                  $0
</TABLE>


         For additional financial information concerning the Partnership and
Benton, see "Information Concerning the 1991-1 Partnership - Selected Historical
Financial Data" and "Unaudited Pro Forma Financial Information" contained in the
Prospectus.


                                       15

<PAGE>   1

                                                                   EXHIBIT 2.1

                            ASSET PURCHASE AGREEMENT


                                     BETWEEN


             BENTON OIL & GAS COMBINATION PARTNERSHIP 1989-1, L.P.,
                        A CALIFORNIA LIMITED PARTNERSHIP

                                     SELLER

                                       AND

                           GOLDKING TRINITY BAY CORP.

                                    PURCHASER


                          FOR THE SELLER'S INTEREST IN

                             THE PROPERTIES KNOWN AS


                              UMBRELLA POINT FIELD


                                 JUNE 30, 1995


<PAGE>   2


                            ASSET PURCHASE AGREEMENT

         This ASSET PURCHASE AGREEMENT (this "Agreement") dated as of June 30,
1995 by and between Goldking Trinity Bay Corp., a Texas corporation,
("Purchaser") and Benton Oil & Gas Combination Partnership 1989-1, L.P., a
California limited partnership ("Seller");

                              W I T N E S S E T H:

         WHEREAS, Seller owns the working interest and net revenue interest set
forth opposite such Seller's name on Schedule 1.2.2;

         WHEREAS, Seller desires to sell to Purchaser the Transferred Assets,
and Purchaser desires to purchase from Seller the Transferred Assets, upon the
terms and subject to the conditions hereinafter set forth; and

         NOW, THEREFORE, in consideration of the premises and of the respective
representations, warranties, covenants, agreements and conditions contained
herein, the parties hereto hereby agree as follows.

                                    ARTICLE I
                                PURCHASE AND SALE

         Unless defined elsewhere in this Agreement, all capitalized terms used
herein shall have the respective meanings given them in Appendix A hereto, which
is incorporated herein by reference and shall be deemed to be a part of this
Agreement for all purposes.

         1.1. CONVEYANCE AND TRANSFER OF TRANSFERRED ASSETS. Seller and
Purchaser hereby agree that, at the Closing, upon the terms and subject to the
conditions of this Agreement, Seller shall convey, transfer and assign to
Purchaser, the Transferred Assets.

              For purposes of this Agreement, the term "Transferred Assets"
shall mean all of each Seller's right, title and interest in certain oil and gas
properties located in Galveston Bay, including all of each Seller's right, title
and interest in and to the following assets:

              (a)     All of the oil and gas leases, oil, gas and mineral leases
         as described in Exhibit A attached hereto and incorporated herein
         (collectively referred to hereinafter as the "Leases" and individually
         as a "Lease"), and the leasehold estates created thereby, and the fee,
         mineral, royalty and overriding royalty interests, net profits
         interests, payments out of production and other real property interests
         described in Exhibit A, together with each and every kind and character
         of right, title, claim or interest that Seller has in and to the lands
         covered thereby, even though the interests of Seller therein may be
         incorrectly described, stated or limited on Exhibit A (collectively the
         "Properties", or singularly, a "Property"), together with all of each
         Seller's right, title and interest in and to all the property and
         rights incident thereto, including without limitation all of Seller's
         right, title and interest in and to:

                      (i)      the rights, privileges, benefits and powers
                  conferred upon the holder of any Property with respect to the
                  use and occupation of the surface of, and the subsurface
                  depths under, the land covered by such Property that may be
                  necessary, convenient or incidental to the possession and
                  enjoyment of such Property;


                                       1
<PAGE>   3


                           (ii)      the rights in any pooled, communitized or
                  unitized acreage included in whole or in part in any Property,
                  including all production from the unit, pool or communitized
                  area allocated to any such Property, and all interests in any
                  wells within the unit, pool or communitized area allocated to
                  such Property, whether such unit or pool production comes from
                  wells located within or without the areas covered by a
                  Property; and

                           (iii)     all tenements, hereditaments and 
                  appurtenances belonging to such Properties;

                  (b) All of each Seller's right, title and interest in and to
         the rights-of-way, easements, servitudes, permits, licenses,
         franchises, certificates of public convenience and necessity and
         similar rights and privileges, and other rights and interests in land
         primarily owned or used in connection with the Properties;

                  (c) All of each Seller's right, title and interest in and to
         all real, personal and mixed property and fixtures located at the
         Closing on the Properties or the aforesaid rights-of-way, easements and
         other related properties, or primarily used or held for use in
         connection with the ownership, management, development, exploration or
         operation of the Transferred Assets, including without limitation all
         of each Seller's right, title and interest in and to all wells, well
         equipment, platforms, pipes, valves, boilers, compressors, separators,
         heaters, dehydrators, gauges, meters and other measuring equipment,
         regulators, extractors, communication equipment, gas gathering systems,
         casing, tubing, pipelines, power lines, fuel lines, generators, pumps,
         motors, buildings, storage tanks and facilities, improvements,
         fittings, machinery, equipment (including, without limitation, personal
         computers and related peripheral equipment located in the field and
         software that is legally transferable without cost), supplies, spare
         parts, materials and inventories, other than inventories of
         Hydrocarbons in storage tanks or other facilities above the pipeline
         connection to each such storage tank or facility, and in gas pipelines
         downstream from the delivery point sales meters on such pipelines
         existing as of the Effective Time;

                  (d) All of each Seller's right, title and interest in and to
         all contracts, agreements, leases, and/or other arrangements, presently
         owned or acquired as a result of any agreement in existence prior to
         the Closing, including all causes of action pursuant thereto, to the
         extent used in connection with the ownership, management, development,
         exploration or operation of the Transferred Assets, including without
         limitation, all gas purchase and sale agreements, crude purchase and
         sale agreements, natural gas liquids purchase and sale agreements,
         farmin or farmout agreements, exchange agreements, bottom hole
         agreements, dry hole agreements, acreage contribution agreements,
         support agreements, seismic agreements, exploration agreements, joint
         venture agreements, operating agreements, unit agreements, pooling and
         communitization agreements, orders or declarations, balancing
         agreements, gas and natural gas liquids processing agreements,
         gathering and transportation agreements, construction and operation
         agreements, options, liens, security interests, vendor financing
         agreements, surface leases, subleases and leases of equipment or
         facilities to the extent used or primarily useful in connection with
         the ownership, management, development, exploration or operation of the
         Transferred Assets and reasonably separable from Seller's other
         material rights in the contracts not used in connection with the
         Transferred Assets; provided, however, that no insurance 


                                       2
<PAGE>   4

         contract or other insurance arrangement shall be included in the 
         Transferred Assets (collectively, the "Contracts");

                  (e) All of each Seller's right, title and interest in and to
         all Hydrocarbons produced from or attributable to, the Properties and
         proceeds attributable thereto, at and after the Effective Time (subject
         to the provision of Section 1.3); provided, however, that all
         Hydrocarbons in storage tanks and other facilities above the pipeline
         connection to each such storage tank or facility, or in gas pipelines
         downstream from the delivery point sale meters on such pipelines at the
         Effective Time, shall remain the property of Seller; and

                  (f) All of each Seller's right, title and interest in and to
         all property and rights incident or attributable to the foregoing
         interests, including, without limitation all of each Seller's right,
         title and interest in and to:

                           (i) subject to the limitations of Section 13.2.8,
                  originals (or, to the extent that originals are not available,
                  copies) of all books, records, files, contracts, muniments of
                  title, reports, surveys and similar documents or materials,
                  including computer tapes, disks and data with respect to any
                  of the foregoing records, that relate to the foregoing
                  interests, including without limitation, the purchase,
                  exchange, operation, administration, sale or marketing
                  thereof, or that constitute evidence of ownership thereof, to
                  the extent such records are reasonably separable from Seller's
                  corporate records, and excluding work product of Seller's
                  legal counsel (other than title opinions) and documents
                  relating to the negotiation and consummation of the
                  transactions contemplated by this Agreement (collectively, the
                  "Records");

                           (ii) (A) the proprietary geological, geophysical and
                  seismic data, materials and information (the "Proprietary
                  Data"), (B) the non-proprietary geological, geophysical and
                  seismic data, materials and information the transfer of which
                  is not prohibited by any copyright or validly existing third
                  party agreement, that is transferable to Purchaser without
                  payment of a transfer fee or other consideration, (C) the
                  maps, interpretations, records and other technical information
                  related to or based upon the Proprietary Data and not related
                  to or based upon the Non-Proprietary Data (the "Proprietary
                  Information") and (D) the maps, interpretations, records and
                  other technical information related to or based upon any
                  combination of the Proprietary Data and the Non-Proprietary
                  Data (the "Combined Information" and collectively, the
                  "Evaluation Data"); and

                           (iii) all division orders, purchase orders, invoices,
                  storage or warehouse receipts, bills of lading and
                  certificates of title to the extent the same are attributable
                  or relate to any of the Transferred Assets, and all documents,
                  instruments, general intangibles and chattel paper primarily
                  related to any of the Transferred Assets (other than the
                  bonds, letters of credit and guarantees posted with
                  governmental agencies, which are expressly reserved by Seller)
                  and all estimated prepayments of royalty obligations of Seller
                  with any federal or state authorities that are directly
                  related to the Transferred Assets and that are transferable to
                  Purchaser;

                                       3
<PAGE>   5


provided, however, that the Transferred Assets shall not include (i) any rights
and causes of action by Seller to receive amounts (or rights to production from
the Properties prior to the Effective Time) pursuant to the Retained Liabilities
and (ii) rights and causes of action with respect to the Lawsuits and the facts
and circumstances giving rise to such Lawsuits as retained by Seller and more
particularly described in Section 14.

         1.2.     PURCHASE PRICE AND PURCHASE PRICE ALLOCATION.

         1.2.1. PURCHASE PRICE. The aggregate purchase price (the "Purchase
Price") for the Transferred Assets shall be THREE HUNDRED SEVENTY-SEVEN THOUSAND
SIXTY-TWO DOLLARS ($377,062)) subject to adjustments as set forth in Section
1.3., of which FOUR THOUSAND NINE HUNDRED TWENTY-NINE DOLLARS ($4,929) ("Initial
Payment") shall be paid to the Seller in immediately available funds upon
delivery to Purchaser by Seller of counterparts of this Agreement executed by
Seller. At the Closing, the Purchase Price, less the amount of the Initial
Payment (the "Cash at Closing") and as adjusted as provided in the Purchase
Price Adjustment Certificate described in Section 1.3.2, shall be paid to Seller
by wire transfer in federal or otherwise immediately available funds.
Simultaneously therewith, Seller shall execute and deliver, effective as of the
Effective Time, the Instruments of Transfer.

         1.2.2. PURCHASE PRICE ALLOCATION. The Purchase Price shall be allocated
among the types and classes of assets constituting the Transferred Assets as set
forth on a schedule to be provided by Purchaser and Seller at Closing.

         1.3.   ADJUSTMENTS TO PURCHASE PRICE.

         1.3.1. ADJUSTMENTS. In addition to any adjustments pursuant to Article
VI, the Cash at Closing shall be adjusted as follows:

                  (i)      The Cash at Closing shall be increased by the 
                  following:

                           (a) An agreed upon amount representing the value of
                  all merchantable oil in storage above the pipeline connection
                  at the Effective Time that is credited to the Properties;

                           (b) Solely to the extent related to the Transferred
                  Assets, the amount of (I) all actual direct operating
                  expenditures, (2) all capital expenditures and (3) all costs
                  and expenses that are incurred by Seller in connection with,
                  or are otherwise allocable to, the operation of the
                  Transferred Assets under the terms of the joint operating
                  agreement during the period of time after the Effective Time;

                           (c) The amount of any Taxes that have been paid by
                  Seller on or prior to the Closing that are attributable to the
                  time after the Effective Time and for which Purchaser is
                  liable pursuant to Article VIII.

                  (ii)     The Cash at Closing shall be decreased by the 
                  following:

                                       4
<PAGE>   6


                           (a) The proceeds that are received by, or payable to,
                  Seller or any other person and that are attributable to the
                  operation of the Transferred Assets for the period of time
                  between the Effective Time and the Closing; and

                           (b) Any amount agreed upon by Purchaser and Seller as
                  the value of any Title Defects, less any amount agreed upon by
                  Purchasers and Seller as the value of any Title Benefits.

         1.3.2. CLOSING ESTIMATE. At least three (3) business days prior to the
Closing Date, Seller on behalf of Seller, shall estimate the Purchase Price
Adjustment Amount and deliver to Purchaser a certificate of an officer of Seller
setting forth in reasonable detail the calculation thereof. The Cash at Closing
shall be adjusted as set forth in such certificate. The Purchase Price
Adjustment Certificate shall include a computation of any reduction in the
Purchase Price caused by the failure of one or more Seller's to deliver on the
Closing Date their respective interests in the Transferred Assets.

         1.3.3. PURCHASE PRICE ADJUSTMENT CERTIFICATE. As soon as reasonably
practicable, and in any event within sixty (60) days following the Closing Date,
Seller shall deliver to Purchaser the Purchase Price Adjustment Certificate.
Within thirty (30) days after delivery of the Purchase Price Adjustment
Certificate, Purchaser shall notify Seller on behalf of Seller, whether
Purchaser agrees or disagrees with the determination of the Purchase Price
Adjustment Amount set forth in the Purchase Price Adjustment Certificate. If
Purchaser disagrees with such determination, representatives of Purchaser and
Seller shall meet and endeavor to resolve their differences regarding the
determination of the Purchase Price Adjustment Amount. If the representatives of
Purchaser and Seller are unable to agree upon such determination of the Purchase
Price Adjustment Amount within twenty (20) business days after Purchaser's
receipt of such notification, Seller shall select an independent accounting firm
from a list of three (3) such firms provided by Purchaser, which firm shall
audit the Purchase Price Adjustment Certificate and determine the Purchase Price
Adjustment Amount. The decision of such independent accounting firm shall be
binding on Seller and Purchaser, and the fees and expenses of such independent
accounting firm shall be borne one-half by Seller and one-half by Purchaser.

         1.3.4. PAYMENT OF PURCHASE PRICE ADJUSTMENT AMOUNT. If the Purchase
Price Adjustment Amount as finally determined pursuant to Section 1.3.3 is a
smaller upward adjustment or a larger downward adjustment than that estimated
pursuant to Section 1.3.2, Seller shall pay to Purchaser the amount of such
excess plus interest thereon at the Agreed Interest Rate from (and including)
the Closing Date to (but excluding) the date of payment. If the Purchase Price
Adjustment Amount as finally determined pursuant to Section 1.3.3 is a larger
upward adjustment or a smaller downward adjustment than that estimated pursuant
to Section 1.3.2, Purchaser shall pay to Seller the amount of such deficiency
plus interest thereon at the Agreed Interest Rate from (and including) the
Closing Date to (but excluding) the date of payment. Any payments contemplated
by this Section 1.3.4 shall be made by wire transfer in federal or other
immediately available funds on or before the fifth business day following the
final determination of the amount thereof.

         1.4. RETAINED RIGHTS AND CLAIMS. Notwithstanding any provision herein
to the contrary, Transferred Assets shall not include any rights or claims of
Seller with respect to the facts and circumstances giving rise to those certain
proceedings collectively referred to as the "Lawsuits" and filed:


                                       5
<PAGE>   7

         In the Matter of the Libel and Petition of Exxon Corporation, as Owner
         of the M/V "Bobcat" and Williamson Boat Works, as Charterer of the M/V
         "Bobcat," her engines tackle, apparel. etc., in a cause of exoneration
         from or limitation of liability; C.A. No. C-91-203, United States
         District Court for the Southern District of Texas, Corpus Christi
         Division; and

         French Production Incorporated v. Exxon Corporation d/b/a Exxon Company
         USA. Williamson Boat Works and Captain B.J. Shirley; No. 91-040865,
         District Court of Harris County, Texas, 295th

         Judicial District.

         1.5.     LIABILITIES ASSUMED AND RETAINED.

         1.5.1. ASSUMED LIABILITIES. Purchaser shall assume and agree to pay,
perform and discharge in the ordinary course of business, only those
liabilities, debts or obligations of Seller that are set forth below (the
"Assumed Liabilities"):

                           (i) all liabilities and obligations of or relating to
                  the Transferred Assets accruing after the Effective Time;

                           (ii) all liabilities and obligations that accrue
                  after the Effective Time, pursuant to the Leases that have
                  been properly consented to and assigned; and

                           (iii) all liabilities and obligations that accrue
                  after the Effective Time, pursuant to the Contracts that have
                  been properly consented to and assigned.

         1.5.2 RETAINED LIABILITIES. Except for the Assumed Liabilities,
Purchaser shall not assume and Seller shall retain and agree to pay, perform and
discharge in the ordinary course of business all liabilities, debts or
obligations of any nature that arise out of or result from any occurrence,
transaction or event occurring prior to the Closing Date relating to the
operation, ownership or use of the Transferred Assets, whether accrued,
absolute, contingent or otherwise, whether due or to become due, including
without limitation any such liability of Seller related to the Lawsuits (the
"Retained Liabilities"); provided however, that Retained Liabilities shall not
include any liability accruing after the Effective Time based on the violation
or alleged violation of any statute, ordinance, rule, regulation, order or other
law of any state, federal, county, local or other governmental subdivision, due
to any occurrence, transaction or event occurring prior to the Effective Time,
which occurrence, transaction or event was not a violation of any laws existing
as of the Effective Time. The Retained Liabilities shall include any liabilities
with respect to the facts and circumstances giving rise to the Lawsuits.

                                   ARTICLE II
                                   THE CLOSING

         2.1. CLOSING. The Closing shall take place at the offices of Purchaser,
in Houston, Texas at 9:00 a.m. on December 31, 1995 or such earlier or later
date as provided hereafter.

         2.2. INSTRUMENTS OF TRANSFER. Seller shall execute and deliver at
Closing the Bill of Sale, Conveyance and Assignment, the form of which is
attached as Exhibit "B" and any other instruments of 


                                       6
<PAGE>   8

transfer sufficient to convey to Purchaser the Transferred Assets, including 
without limitation the following (the "Instruments of Transfer"):

                  (a)       any personal property included in the Transferred 
                            Assets;

                  (b)       the Leases, assignment of leasehold interests;

                  (c)       the Contracts; and

                  (d)       the Properties.

                                   ARTICLE III
                    REPRESENTATIONS AND WARRANTIES OF SELLER

         Seller hereby represents, warrants and covenants as follows:

         3.1. ORGANIZATION AND GOOD STANDING. Seller is a partnership duly
organized, validly existing and in good standing under the laws of its
jurisdiction of formation and has all requisite power and authority to own and
lease the properties and assets it owns and leases and to carry on its business
as such business is conducted.

         3.2. SUBSIDIARIES. No Seller has any Subsidiaries that own any of the
Transferred Assets.

         3.3. AUTHORITY; AUTHORIZATION OF AGREEMENT. Seller at closing will have
all requisite power and authority to execute and deliver this Agreement, the
Instruments of Transfer and each of the other agreements and documents
contemplated, to consummate the transactions contemplated hereby and thereby and
to perform all the terms and conditions to be performed by it. The execution and
delivery of this Agreement, the Instruments of Transfer and each of the other
agreements and documents contemplated, the performance of all the terms and
conditions to be performed by Seller and the consummation of the transactions
contemplated hereby and thereby will be duly authorized and approved by the
partners of Seller. This Agreement, the Instruments of Transfer and each of the
other agreements and documents contemplated, have been duly executed and
delivered by each Seller and constitutes the valid and binding obligation of
each Seller, enforceable against such Seller in accordance with its terms,
except as such enforceability may be limited by bankruptcy, insolvency or other
laws relating to or affecting the enforcement of creditors' rights generally and
general principles of equity (regardless of whether such enforceability is
considered in a proceeding in equity or at law).

         3.4. NO VIOLATIONS. Subject to Article VIII(7)2.4., this Agreement, the
Instruments of Transfer and each of the other agreements and documents
contemplated hereby or thereby, and the execution and delivery hereof by Seller
does not, and the fulfillment and compliance with the terms and conditions
hereof and thereof and the consummation of the transactions contemplated hereby
and thereby will not:

                  (i) conflict with, or require the consent of any Person under,
         any of the terms, conditions or provisions of the partnership agreement
         of the Seller;


                                       7
<PAGE>   9

                  (ii) violate any provision of the Code, the NGA or the NGPA,
         or require any filing, consent, authorization or approval under, any
         Legal Requirement applicable to or binding upon Seller, other than the
         consent to the transfer and assignment of Leases by the General Land
         Office of the State of Texas, which consent Seller shall obtain as soon
         as possible following the Closing;

                  (iii) conflict with, result in a breach of, constitute a
         default under (without regard to requirements of notice or the lapse of
         time or both), accelerate or permit the acceleration of the performance
         required by, or require any consent, authorization or approval under,
         (a) any mortgage, indenture, loan, credit agreement or other agreement
         or instrument evidencing indebtedness for borrowed money or any
         Contract to which Seller is a party or by which Seller is bound or to
         which any of its properties are subject or (b) any Lease to which
         Seller is a party or by which it is bound or to which any of its
         properties are subject; or

                  (iv) result in the creation or imposition of any Encumbrance
         upon the Transferred Assets;

which violation, breach or Encumbrance with respect to the matters specified in
clauses (ii) through (iv) of this Section 3.4 have had or would reasonably be
expected to have a Material Adverse Effect.

         3.5. NO DEFAULT. Seller is not in default under, and no condition
exists that with notice or lapse of time or both would constitute a default
under, (i) any mortgage, indenture, loan, credit agreement or other agreement or
instrument evidencing indebtedness for borrowed money or (ii) any Contract or
Lease to which Seller is a party or by which Seller is bound or to which any of
the Transferred Assets is subject.

         3.6. ABSENCE OF CERTAIN CHANGES. Since the Effective Time, there has
not been any material damage, destruction or loss to, or of, the Transferred
Assets, that has not been covered by insurance.

         3.7. TAXES. All returns, statements and reports with respect to Taxes
that are required to be filed by Seller on or before the Closing have been (or
will have been by the Closing) timely filed with the appropriate Governmental
Authorities and all such Taxes shown thereon as due have been (or will have been
by the Closing) paid or deposited.

         3.8. DEFENSIBLE TITLE. Seller has, and will have at the Closing Date,
Defensible Title to the Oil and Gas Interests. Each Seller represents as to
itself only that it is transferring 100% of its interest in the Transferred
Assets and that by, through and under it, no event has occurred and no
conveyance has been made that would cause such Seller's interest in the
Transferred Assets to be less than the Warranted Interest. Each Seller, as to
itself only, represents and warrants that it owns the Warranted Interest;
provided that the representation and warranty contained in this sentence shall
terminate at Closing. Purchaser's exclusive remedy for any breach of the
warranties set forth in this Section 3.8 shall be the remedy provided in Article
VI.

         3.9. LEASES. With respect to the Leases:

                  (i) the Leases have been maintained according to their terms,
         in compliance with the agreements to which the Leases are subject,
         during the period in which Seller has owned an interest in such Leases;

                  (ii) Seller has made or caused to be made all payments,
         including royalties, delay rentals and shut-in royalties (due in
         respect of the Leases thereunder), during the period in which 


                                       8
<PAGE>   10

         Seller has owned an interest in such Leases and no amounts of such 
         payments due during such period are now being held in suspense;

                  (iii) to the Knowledge of Seller, no other Party to any Lease
         is in breach or default with respect to any of its obligations
         thereunder;

                  (iv) there has not occurred any event, fact or circumstance
         which with the lapse of time or the giving of notice, or both, would
         constitute such a breach or default on behalf of the Seller or, to the
         Knowledge of Seller, with respect to any other parties; and

                  (v) neither Seller nor, to the Knowledge of Seller, any other
         party to any Lease has given or threatened to give notice of any action
         to terminate, cancel, rescind or procure a judicial reformation of any
         Lease or any provisions thereof.

         3.10.    ENVIRONMENTAL MATTERS.

                  (a) To the Knowledge of Seller, since, May 19, 1989, the date
         that Seller closed the acquisition of its interest in the Properties,:

                           (i) the use of the Transferred Assets has been
                  limited to the conduct of oil and gas exploration and
                  production operations and related activities;

                           (ii) Seller has not received notice that any
                  Governmental Authority has commenced any investigation or
                  inquiry regarding failure of the Transferred Assets and/or the
                  operations conducted thereon to comply with Environmental Laws
                  or any notice under the Comprehensive Environmental Response,
                  Compensation, and Liability Act, or any state or local laws;

                           (iii) Except for the disposal of salt water produced
                  from the wells located on the Leases using practices
                  consistent with those customarily used by the oil and gas
                  industry operating in the Gulf Coast area, the Transferred
                  Assets have not been used for the generation, storage or
                  disposal of Hazardous Substances or as a landfill or other
                  waste disposal site for Hazardous Substances, in any manner
                  that would constitute a violation of the Environmental Laws by
                  such person; and

                           (iv) Seller has not installed and has not discovered,
                  on the Lands, any underground storage tanks other than the
                  ordinary underground pipeline systems used in the conduct of
                  oil and gas operations on the Transferred Assets.

                  (b) To the Knowledge of Seller:

                           (i) the Transferred Assets and the operations
                  conducted thereon are not the subject of any existing,
                  unfulfilled administrative or judicial orders, decrees,
                  judgments, license or permit conditions, or other directives,
                  under any Environmental Law, except as listed on Schedule
                  3.10;

                           (ii) no equipment or other personal property or
                  improvements owned or used on the Transferred Assets contain
                  asbestos in such amount, concentration or level that would
                  constitute a violation of Environmental Laws, except as listed
                  on Schedule 3.10;

                           (iii) no equipment or other personal property or
                  improvements owned or used on the Transferred Assets contain
                  any polychlorinated biphenyls in such amount, 


                                       9
<PAGE>   11

                  concentration or level that would constitute a violation of 
                  Environmental Laws, except as listed on Schedule 3.10;

                           (iv) no equipment or other personal property or
                  improvements owned or used on the Transferred Assets contain
                  any naturally occurring radioactive material in such amount,
                  concentration or level that would constitute a violation of
                  Environmental Laws, except as listed on Schedule 3.10;

                           (v) except for violations that would not have a
                  Material Adverse Effect on the Transferred Assets or the
                  operations being conducted thereon, such operations conducted
                  thereon are not in violation of, or non-compliance with, any
                  Environmental Laws, nor are they the subject of any activities
                  under the Comprehensive Environmental Response, Compensation,
                  and Liability Act, or analogous state or local laws; and

                           (vi) neither the execution of this Agreement nor the
                  consummation of the transactions contemplated by this
                  Agreement will violate any Environmental Law or require the
                  consent or approval of any agency charged with enforcing any
                  Environmental Law.

                  (c) Notwithstanding any contrary provision in this Agreement
         or any document or instrument delivered with respect to this Agreement,

                           (i) Seller makes no representation or warranty with
                  respect to compliance with any Environmental Law of any kind
                  except as provided in this Section 3.10;

                           (ii) All representations and warranties contained in
                  this Section 3.10 are qualified by the knowledge of Seller and
                  Purchaser that the Environmental Protection Agency has not
                  issued permits for the discharge of salt water and other
                  materials from oil and gas exploration and production
                  facilities such as those that are included in the Transferred
                  Assets and that located in the Gulf Coast area, that until
                  recently the Environmental Protection Agency had not provided
                  any written guidance as to the procedures required for
                  application for such permits and that the operator of the
                  Transferred Assets, like other operators of oil and gas
                  exploration and production facilities in the Gulf Coast area,
                  has not been able to obtain such permit; and

                           (iii) All representations and warranties contained in
                  this Section 3.10 shall terminate at the end of the
                  Environmental Indemnity Period, following which the Purchaser
                  agrees not to institute any action or claim for a breach of
                  such representation or warranty; provided, however, that the
                  expiration of the Environmental Indemnity Period shall be
                  extended as to any bona fide claim with respect to the breach
                  of such representation or warranty, solely to the extent that
                  Purchaser asserted such claim according to the procedures
                  provided in Section 10.5 and Section 10.6, if the Purchaser
                  shall have transmitted the Claim Notice with respect to such
                  claim to the Seller prior to the expiration of such
                  Environmental Indemnity Period.

         3.11. OPERATIONS AND EXPENDITURES. With respect to the joint, unit or
other operating agreements affecting the Transferred Assets, there are no
outstanding calls or payments under authorities for expenditures concerning any
single expenditure to be made by Seller in excess of $5,000 that are due or
which Seller has committed to make and that have not been made, except as set
forth on Schedule 3.11 annexed to this Agreement.

         3.12. CONTRACTS. All of the Contracts are set forth on Exhibit "A" to
this Agreement.


                                       10
<PAGE>   12

         3.13. TAX PARTNERSHIPS. Except as disclosed on Schedule 3.13 annexed to
this Agreement, none of the Transferred Assets are subject to a tax partnership,
except Seller's partnership agreement.

         3.14. FULL DISCLOSURE. No representation or warranty by Seller in this
Article III, in any schedule or exhibit to this Agreement, or in any certificate
or document furnished or to be furnished by Seller on the Closing Date, contains
or will contain any untrue statement of a material fact, or omits or will omit
to state a material fact necessary to make the statements contained therein not
misleading.

                                   ARTICLE IV
                   REPRESENTATIONS AND WARRANTIES OF PURCHASER

         Except as otherwise disclosed in this Agreement, Purchaser hereby
represents and warrants that:

         4.1. ORGANIZATION AND GOOD STANDING. Purchaser is a corporation duly
organized, validly existing and in good standing under the laws of its
jurisdiction of incorporation.

         4.2. CORPORATE AUTHORITY; AUTHORIZATION OF AGREEMENT. Purchaser has all
requisite corporate power and authority to execute and deliver this Agreement,
to consummate the transactions contemplated hereby and to perform all the terms
and conditions hereof to be performed by it. The execution and delivery of this
Agreement by Purchaser, the performance by Purchaser of all the terms and
conditions hereof to be performed by it and the consummation of the transactions
contemplated hereby will have been duly authorized and approved by the Board of
Directors of Purchaser. This Agreement has been duly executed and delivered by
Purchaser and constitutes the valid and binding obligation of Purchaser,
enforceable against it in accordance with its terms, except as such
enforceability may be limited by bankruptcy, insolvency or other laws relating
to or affecting the enforcement of creditors' rights generally and general
principles of equity (regardless of whether such enforceability is considered in
a proceeding in equity or at law).

         4.3. NO VIOLATIONS. This Agreement and the execution and delivery
hereof by Purchaser do not, and the fulfillment and compliance with the terms
and conditions hereof and the consummation of the transactions contemplated
hereby will not:

                  (i) conflict with, or require the consent of any Person under,
         any of the terms, conditions or provisions of the certificate of
         incorporation or bylaws of Purchaser;

                  (ii) violate any provision of, or require any filing, consent,
         authorization or approval under, any Legal Requirement applicable to or
         binding upon Purchaser (assuming receipt of all routine governmental
         consents typically received after consummation of transactions of the
         nature contemplated by this Agreement);

                  (iii) conflict with, result in a breach of, constitute a
         default under (without regard to requirements of notice or the lapse of
         time or both), accelerate or permit the acceleration of the performance
         required by, or require any consent, authorization or approval under
         (a) any mortgage, indenture, loan, credit agreement or other agreement
         or instrument evidencing indebtedness for borrowed money to which
         Purchaser is a party or by which Purchaser is bound or to which any of
         its properties is subject or (b) any lease, license, contract or other
         agreement or instrument to which Purchaser is a party or by which it is
         bound or to which any of its properties is subject; or


                                       11
<PAGE>   13

                  (iv) result in the creation or imposition of any Encumbrance
         upon the assets of Purchaser;

which violation, breach or encumbrance with respect to the matters specified in
clauses (ii) through (iv) of this Section 4.3 might reasonably be expected to
have a material adverse effect on the business, financial condition or results
of operations of Purchaser, taken as a whole.

         4.4. LITIGATION. There is no action, suit, proceeding or governmental
investigation or inquiry pending, or, to the Knowledge of Purchaser, threatened
against Purchaser or its subsidiaries or any of their respective properties that
might delay, prevent or hinder the consummation of the transactions contemplated
hereby.

                                    ARTICLE V

                       ADDITIONAL AGREEMENTS AND COVENANTS

         5.1. COVENANTS OF SELLER. Seller covenants and agrees with Purchaser as
follows:

         5.1.1. CERTAIN CHANGES. Except as may be expressly permitted by this
Agreement or set forth in any Schedule hereto, from the date hereof until the
Closing, without first obtaining the written consent of Purchaser (which consent
will not be unreasonably withheld), Seller will not:

                  (i) enter into, assign, terminate or amend in any material
         respect any Contract or Lease;

                  (ii) sell, lease or otherwise dispose of any of the
         Transferred Assets;

                  (iii) purchase, lease or otherwise acquire any property of any
         kind whatsoever other than in the ordinary course of business;
         provided, however, that no such action involving an expenditure of
         $5,000 or more by Seller shall be taken by Seller without Purchaser's
         prior written consent;

                  (iv) mortgage, encumber or pledge any of the Transferred
         Assets;

                  (v) operate the Transferred Assets except diligently and in
         the usual, regular and ordinary manner, consistent with past practices;
         or

                  (vi) commit itself to do any of the foregoing.

         5.1.2. OPERATION OF PROPERTIES. Except as may be expressly permitted
hereunder or as set forth in any Schedule hereto, from the date hereof until the
Closing, without first obtaining the written consent of Purchaser (which consent
will not be unreasonably withheld), Seller will not:

                  (i) waive any right of material value relating to any of the
         Transferred Assets;

                  (ii) release or abandon any material part of any of the
         Transferred Assets;


                                       12
<PAGE>   14


                  (iii) convey, farm out or otherwise dispose of Transferred
         Assets with a fair market value exceeding either $5,000 on an
         individual basis or $5,000 in the aggregate;

                  (iv) commence or consent to any material operations on any
         Property that it has not previously committed to and that may be
         expected to cost Seller in excess of $5,000 (except for emergency
         operations, in which case Seller shall promptly notify Purchaser and
         from the date of Purchaser's response to such notice Seller shall once
         again be subject to the limitations contained in this clause (iv));

                  (v) enter into, modify or terminate any Contracts or Lease; or

                  (vi) commit itself to do any of the foregoing;

provided, however, that nothing contained in this Section 5.1.2 or elsewhere in
this Agreement shall limit the rights of Seller to produce, consume and sell
Hydrocarbons from the Properties in the ordinary course of business and to
comply with requirements of the NGA, the NGPA and any rules or regulations
issued thereunder.

         5.1.3. CERTAIN COVENANTS WITH RESPECT TO THE TRANSFERRED ASSETS. Except
as may otherwise be expressly provided herein, Seller will, from the date hereof
to the Closing, unless otherwise consented to in writing by Purchaser (which
consent will not be unreasonably withheld):

                  (i) promptly notify Purchaser of the receipt of any written
         notice or written claim or written threat of notice or claim of which
         Seller becomes aware relating to any default or breach under, or of any
         termination or cancellation or written threat of termination or
         cancellation of, any of the Leases, Properties or Material Contracts;

                  (ii) promptly notify Purchaser of any loss of or damage to any
         portion of the Transferred Assets exceeding $5,000 in amount;

                  (iii) cause to be paid all rentals, shut-in royalties, minimum
         royalties and other payments that are necessary to maintain in force
         its rights in and to the Properties, and pay timely all costs and
         expenses incurred by it in connection with the Properties, except such
         costs and expenses as are being contested in good faith; and

                  (iv) as to the Properties, use its Best Efforts to maintain
         and operate the Properties in accordance with all applicable Legal
         Requirements (to the extent consistent with customary practices in the
         oil and gas industry), in accordance with the Contracts relating
         thereto, and in substantially the same manner that Seller hereto has
         operated such properties.

         5.1.4. ACCESS. Seller will afford to Purchaser and its authorized
representatives upon reasonable notice, reasonable access from the date hereof
until the Closing Date, during normal business hours, to its personnel,
financial data properties, books and records which are related to the
Transferred Assets to the extent that such access and disclosure would not
unreasonably interfere with the normal operation of the business of Seller or
violate the terms of any agreement by which Seller is bound or any applicable
Legal Requirement; provided, however, that the confidentiality of any data or
information so acquired shall be maintained by Purchaser and its representatives
in accordance with Section 5.2.4.


                                       13
<PAGE>   15


         5.1.5. BEST EFFORTS. Seller will use its Best Efforts to obtain the
satisfaction of the conditions to Closing set forth in Section 7.1.

         5.1.6. PUBLIC ANNOUNCEMENTS. Except for communications with its
partners, Seller shall not issue any public announcement or statement with
respect to the transactions contemplated hereby except upon the consent of
Purchaser or upon the advice of counsel that such announcement or statement is
legally required; provided, however, that Seller shall, if practical under the
circumstances, consult with Purchaser prior to issuing any such public
announcement or statement.

         5.1.7. PERMISSIONS. Seller will cooperate with Purchaser and take all
action reasonably necessary (i) to obtain all such permissions, approvals and
consents by Governmental Authorities and others as may be required to consummate
the transactions contemplated in this Agreement and (ii) to obtain the transfer
to Purchaser of any and all operating rights held by Seller.

         5.2. COVENANTS OF PURCHASER. Purchaser covenants and agrees with Seller
as follows:

         5.2.1. BEST EFFORTS. Purchaser will use its Best Efforts to obtain the
satisfaction of the conditions to Closing set forth in Section 7.2.

         5.2.2. PUBLIC ANNOUNCEMENTS. Purchaser shall not issue any public
announcement or statement with respect to the transactions contemplated hereby
except upon the consent of Seller or upon the advice of counsel that such
announcement or statement is legally required; provided, however, that Purchaser
shall, if practical under the circumstances, consult with Seller prior to
issuing any such public announcement or statement.

         5.2.3. CONFIDENTIAL INFORMATION. In the event that this Agreement is
terminated or, if not terminated, until the Closing, the confidentiality of any
data or information received by Purchaser regarding the business and assets of
Seller shall be maintained by Purchaser and its representatives in accordance
with the Confidentiality Agreement that was executed by Purchaser.

         5.2.4. USE OF TRADE NAMES. After the Closing, Purchaser shall not use
any logos, trademarks or trade names belonging to Seller, and will, as soon as
reasonably practicable after the Closing, remove any such trade names from all
signs or labels on the Transferred Assets.

                                   ARTICLE VI
                           INSPECTION OF TITLE MATTERS

         6.1. TITLE DEFECTS.

                  (a) Any Encumbrances that individually or in the aggregate
         with other defects could cause the title of Seller in any Property
         described in Exhibit A to be less than Defensible Title shall be a
         title defect ("Title Defect"). Purchaser shall be entitled to the
         remedies set forth in Section 6.3 for any matter that constitutes a
         Title Defect even though Purchaser could, but for this provision, after
         Closing obtain indemnification for such matter pursuant to Section
         10.2.


                                       14
<PAGE>   16

                  (b) Any circumstances or condition that could operate to cause
         (i) the Net Revenue Interest of Seller to increase above that set forth
         on Exhibit A without an increase in the Working Interest of Seller, or
         (ii) the Working Interest of Seller to decrease below that set forth on
         Exhibit A without a decrease in the Net Revenue Interest of Seller,
         shall be a title benefit ("Title Benefit").

         6.2. NOTICE OF TITLE DEFECTS AND TITLE BENEFITS.

                  (a) From time to time during the period from the date of
         execution of this Agreement until seven (7) days prior to the Closing
         Date (the "Title Examination Period"), Purchaser shall have the right
         (but not the obligation) to notify Seller of any Title Defect of which
         Purchaser becomes aware, providing in such notice a reasonably detailed
         description of such Title Defect. If the Closing Date is extended
         beyond the Closing Date stated herein in accordance with the provisions
         hereof, then the Title Examination Period shall be extended for a
         similar and parallel length of time. With respect to each notice of a
         Title Defect given during such period, Seller may, but shall have no
         obligation to, attempt to cure such Title Defect prior to Closing.
         Purchaser's failure to give notice of a Title Defect shall not impair
         Purchaser's rights under any express warranty or indemnification made
         by Seller under this Agreement or the Instruments of Transfer.

                  (b) From time to time during the Title Examination Period,
         Purchaser shall notify Seller of any Title Benefits of which Purchaser
         becomes aware and Seller shall have the right (but not the obligation)
         to notify Purchaser of any Title Benefit of which they become aware.
         The value of any such Title Benefits shall be mutually agreed upon by
         Purchaser and Seller, taking into consideration the allocated value of
         the Property (asset forth on allocation of the Purchase Price) subject
         to the Title Benefit, the portion of the Property subject to the Title
         Benefit, the legal effect of the Title Benefit and the anticipated
         economic effect of the Title Benefit over the life of the Property
         subject to such Title Benefit.

         6.3. REMEDIES FOR TITLE DEFECTS. In the event that any Title Defects is
not cured on or before Closing, Purchaser may, at its own election, (a) waive
such Title Defect, (b) elect to terminate this Agreement pursuant to Section
9.1, or (c) reduce the Purchase Price by an amount mutually agreed upon by
Purchaser and Seller as being the value of such Title Defect, taking into
consideration the allocated value of the Property subject to the Title Defect,
the portion of the Property subject to the Title Defect, the legal effect of the
Title Defect on the Property and the liability of Purchaser relative to the
allocated liabilities related to the Property and/or whether the Title Defect is
applicable to a portion of the Property that is not encumbered by the allocated
liability, and the anticipated economic effect of the Title Defect over the life
of the Property subject to the Title Defect (including the potential amount of
reduction of discounted present net worth of net future cash flow on account of
such Title Defect), subject to offset for the value of Title Benefits. If the
parties are unable to agree as to the amount of any adjustment under Section 6.3
(c), either party may terminate this Agreement. Notwithstanding anything to the
contrary in this Section 6.3, in no event shall the reduction in the Purchase
Price for all Title Defects affecting any Property exceed the allocated value of
such Property.

         6.4. SELLER'S WARRANTY OF TITLE. The Conveyances shall contain a
special warranty of title whereby Seller binds and obligates itself, its
successors and assigns, to warrant and forever defend unto Purchaser, its
successors and assigns, title to the Properties and other tangible Transferred
Assets against all persons lawfully claiming or to claim the same or any part
thereof by, through or under Seller, but not 



                                       15
<PAGE>   17

otherwise, together with full subrogation of Purchaser, to the extent that
Seller is entitled to grant such subrogation, to all representations and
warranties of any predecessors of Seller in title.

                                   ARTICLE VII
                              CONDITIONS TO CLOSING

         7.1. CONDITIONS TO THE OBLIGATIONS OF PURCHASER. The obligations of
Purchaser to proceed with the Closing contemplated hereby are subject to the
satisfaction on or prior to the Closing of all of the following conditions, any
one or more of which may be waived, in whole or in part, in writing by
Purchaser:

         7.1.1. COMPLIANCE. Except as otherwise contemplated or permitted
herein, the representations and warranties made herein by Seller shall be
correct at and as of the Closing as though such representations and warranties
were made at and as of the Closing, and Seller shall have complied with all the
covenants and other agreements hereof required by this Agreement to be performed
by it at or prior to the Closing.

         7.1.2. OFFICER'S CERTIFICATES. Purchaser shall have received
certificates, dated the Closing Date, of an executive officer of Seller
certifying as to the matters specified in Section 7.1.1.

         7.1.3. NO ORDERS. The Closing hereunder shall not violate any order or
decree of any Governmental Authority having competent jurisdiction over the
transactions contemplated by this Agreement; provided, however, that if such
order or decree is a temporary restraining order or other ex parte order or
decree and all other conditions precedent to Closing have been satisfied or
waived, the Closing Date shall be extended to a date five (5) business days
subsequent to the date on which such temporary restraining order or other ex
parte order or decree ceases to be in effect.

         7.1.4. CONSENTS TO ASSIGNMENTS. Seller shall have delivered to
Purchaser satisfactory consents to the assignment of the Leases and Contracts.

         7.1.5. TITLE OPINION. Purchaser shall have received within ten (10)
business days prior to Closing a title opinion, in a form reasonably
satisfactory to Purchaser, from Purchaser's special title opinion counsel
relating to the Transferred Assets.

         7.1.6. DAMAGE TO TRANSFERRED ASSETS. Purchaser's obligation to purchase
the Seller's interest in the Transferred Assets is conditioned upon the absence
of any material damage, destruction or loss to, or of, the platform, platform
equipment, pipelines, tankage or related surface equipment, included as part of
the Transferred Assets, that has not been covered by insurance.

         7.1.7. FRENCH CLOSING. Purchaser's obligation to purchase the Seller's
interest in Transferred Assets is conditioned upon Purchaser's closing on the
purchase of at least seventy-five percent (75%) of the Working Interest in the
Leases pursuant to that certain Asset Purchase Agreement between Purchaser and
Pelham, Inc., et al., dated May 15, 1995.


                                       16
<PAGE>   18


         7.2. CONDITIONS TO THE OBLIGATIONS OF SELLER. The obligation of Seller
to proceed with the Closing contemplated hereby is subject to the satisfaction
on or prior to the Closing of all of the following conditions, any one or more
of which may be waived, in whole or in part, in writing by Seller:

         7.2.1. COMPLIANCE. Except for such breaches of representations or
warranties by and covenants of Purchaser made herein as would not have a
material adverse effect on the business, financial condition and results of
operations of Purchaser, taken as a whole, the representations and warranties
made herein by Purchaser shall be correct at and as of the Closing as though
such representations and warranties were made at and as of the Closing, and
Purchaser shall have complied with all the covenants and other agreements
required by this Agreement to be performed by it at or prior to the Closing.

         7.2.2. OFFICER'S CERTIFICATE. Seller shall have received a certificate
dated the Closing Date of an executive officer of Purchaser, certifying as to
the matters specified in Section 7.2.1.

         7.2.3. NO ORDERS. The Closing hereunder shall not violate any order or
decree of any Governmental Authority having competent jurisdiction over the
transactions contemplated by this Agreement; provided, however, that if such
order or decree is a temporary restraining order or other ex parte order or
decree and all other conditions precedent to Closing have been satisfied or
waived, the Closing Date shall be extended to a date five (5) business days
subsequent to the date on which the temporary restraining order or such other ex
parte order or decree ceases to be in effect.

         7.2.4. APPROVAL BY PARTNERS. Seller shall have received the affirmative
vote of at least 75% of the Seller's partners to ratify and approve this
Agreement and the transactions contemplated hereby.

                                  ARTICLE VIII
                                   TAX MATTERS

         8.1.     LIABILITY FOR TAXES.

         8.1.1. SELLER. Seller shall be liable for (i) all Taxes for any taxable
period ending on or before the Effective Time, (ii) any income taxes which are
imposed on the gain recognized by Seller on the sale of the Transferred Assets
pursuant to this Agreement, (iii) the portion that is determined as described in
Section 8.1.4, of any Taxes (other than Taxes described in clause (ii) above)
for any taxable period beginning before and ending after the Effective Time and
that is allocable to the portion of such period occurring on or before the
Effective Time (the "Seller Period") and (iv) any sales, use, transfer or
similar taxes arising from the transactions contemplated in this Agreement.

         8.1.2. PURCHASER. Purchaser shall be liable for all Taxes attributable
to the Transferred Assets and arising after the Effective Time.

         8.1.3. INDEMNITY. Seller shall indemnify and hold Purchaser harmless
from any liability for amounts for which Seller is liable pursuant to Section
8.1.1. Purchaser shall indemnify and hold Seller harmless from any liability for
amounts for which Purchaser is liable pursuant to Section 8.1.2. The amount of
any indemnity under this Section 8.1.3 shall include any additional amount
necessary to indemnify the recipient of the indemnity payment against any taxes
imposed, and any attorneys' fees or other litigation costs incurred, in
connection with such indemnity payment.



                                       17
<PAGE>   19

         8.1.4. AD VALOREM TAXES. Whenever it is necessary for purposes of
Section 8.1.1 to determine the portion of any Taxes for a taxable period
beginning before and ending after the Effective Time, which portion is allocable
to the Seller Period, the determination shall be made for ad valorem Taxes, on a
per diem basis and for other Taxes, on the assumption that the Seller Period
constitutes a separate taxable period and by taking into account the actual
taxable events occurring during such period (except that exemptions, allowances
and deductions for a taxable period beginning before and ending after the
Effective Time that are calculated on an annual or periodic basis, such as the
deduction for depreciation, shall be apportioned to the Seller Period on a per
diem basis).

         8.1.5. REFUNDS. If any Seller or Purchaser or any affiliate of a Seller
or Purchaser receives (whether by payment, credit, offset or otherwise) a refund
in respect of any Taxes for which the other party is liable under Section 8.1.1
or 8.1.2, the party receiving such refund shall, within thirty (30) days after
receipt of such refund, remit it to the party liable for the Taxes with respect
to which the refund was received. The parties shall cooperate with each other in
taking all necessary steps to claim any such refund.

         8.1.6. ADJUSTMENT. For purposes of this Section 8.1, the amount of any
downward adjustment to the Purchase Price pursuant to Section 1.3.1(ii)(b) shall
be treated as a payment by Seller of ad valorem taxes imposed with respect to
the Transferred Assets for 1994.

         8.2. COOPERATION AN EXCHANGE OF INFORMATION. Seller or Purchaser will
provide, or cause to be provided, to the other party copies of all
correspondence received from any taxing authority by such party or any of its
affiliates in connection with the liability for Taxes for any period for which
such other party is or may be liable under Section 8.1.1 or 8.1.2. The parties
will provide each other with such cooperation and information as they may
reasonably request of each other in preparing or filing any return, amended
return or claim for refund, in determining a liability or a right to refund or
in conducting any audit or other proceeding in respect of Taxes imposed on the
parties or their respective affiliates. The parties and their affiliates will
preserve and retain all returns, schedules, work papers and other documents
relating to any such returns, claims, audits or other proceedings until the
expiration of the statutory period of limitations (with regard to waivers and
extensions) of the taxable periods to which such documents relate and until the
final determination of any payments which may be required with respect to such
periods under this Agreement and shall make such documents available to
representatives of the other party upon reasonable notice and at reasonable
times, it being understood that such representatives shall be entitled to make
copies of any such books and records as they shall deem necessary. Seller or
Purchaser further agree to permit representatives of the other party to meet
with employees of such party on a mutually convenient basis in order to enable
such representatives to obtain additional information and explanations of any
documents provided pursuant to this Section 8.2. Seller or Purchaser shall make
available to the representatives of the other party at the then current
administrative headquarters of such party sufficient work space and facilities
to perform the activities described in the two preceding sentences. Any
information obtained pursuant to this Section 8.2 shall be kept confidential,
except as may be otherwise necessary in connection with the filing of returns or
claims for refund or in conducting any audit or other proceeding. Each party
shall provide the cooperation and information required by this Section 8.2 at
its own expense.

         8.3. PAYMENT OF TAXES.

         8.3.1. PAYMENT. All Taxes shall be paid by the party that, on the date
that such Taxes are required to be paid, is legally responsible to pay such
Taxes.



                                       18
<PAGE>   20

         8.3.2. TIME OF PAYMENT. Except as otherwise provided in this Article
VIII or in Section 1.3, any amount to which a party is entitled under this
Article VIII shall be promptly paid to such party by the party obligated to make
such payment following written notice to the party so obligated that the Taxes
to which such amount relates are due and that provides details supporting the
calculation of such amount.

         8.4. SURVIVAL OF OBLIGATIONS. The obligations of the parties set forth
in this Article VIII shall be unconditional and absolute and shall remain in
effect without limitation as to time.

         8.5. CONFLICT. In the event of a conflict between the provisions of
this Article VIII and any other provisions of this Agreement, the provisions of
this Article VIII shall control.

                                  ARTICLE NINE
                                   TERMINATION

         9.1. GROUNDS FOR TERMINATION. This Agreement may be terminated at any
time prior to the Closing:

                  (i) by the mutual written agreement of Seller and Purchaser;

                  (ii) by Seller or Purchaser, if the consummation of the
         transactions contemplated hereby would violate any nonappealable final
         order, decree or judgment of any Governmental Authority having
         competent jurisdiction enjoining, restraining or otherwise preventing
         the consummation of this Agreement or the transactions contemplated
         hereby; provided, however, that a party shall not be allowed to
         exercise any right of termination pursuant to this Section 9.1(ii) if
         the event giving rise to such right shall be due to the negligent or
         willful failure of such party to perform or observe in any material
         respect any of the covenants or agreements set forth herein to be
         performed or observed by such party;

                  (iii) by Purchaser or Seller if the Closing shall not have
         occurred prior to 5:00 p.m., December 31, 1995; provided, that the
         Closing was not delayed as a result of the negligent or willful failure
         of the terminating party's obligation to perform hereunder;

                  (iv) by Seller or Purchaser if the non-terminating party has
         breached its representations and warranties, defaulted in the
         performance of its covenants or not satisfied its conditions to
         Closing;

                  (v) by Purchaser, or by Seller, as provided in Section 6.3; or

                  (vi) by Seller, if there is a breach of any representation or
         warranty under Section 3.10 and the cost of curing such breach would
         exceed $500,000 and such breach is not waived by Purchaser.

         9.2. EFFECT OF TERMINATION. The following provisions shall apply in the
event of a termination of this Agreement:



                                       19
<PAGE>   21

         9.2.1. NO LIABILITY. If this Agreement is terminated as permitted under
Section 9.1 (i), (ii), (iii), (v) or (vi), such termination shall be without
liability of any party to this Agreement or any affiliate, shareholder,
director, officer, employee, agent or representative of such party and Seller
shall return to Purchaser the Initial Payment. In such event, the representation
contained in the second sentence of Section 4.2 shall be of no effect.

         9.2.2. PURCHASER'S LIABILITY. If this Agreement is terminated by
Seller, as permitted under Section 9.1 (iv), Seller shall retain the Initial
Payment, as Seller's sole remedy, and Purchaser shall have no further obligation
to Seller for failure to close the transaction.

         9.2.3. SELLER'S LIABILITY. If this Agreement is terminated by
Purchaser, as permitted under Section 9.1 (iv), Purchaser's sole remedy shall be
the right to seek specific performance of Seller's obligation to sell to
Purchaser the Transferred Assets in complete satisfaction of any other damages,
thereby sustained or incurred by Purchaser.

         9.2.4. SURVIVAL. Notwithstanding the foregoing, the provisions of this
Article IX and Section 5.2.3 shall survive any termination of this Agreement.

                                    ARTICLE X
                     EXTENT AND SURVIVAL OF REPRESENTATIONS
                         AND WARRANTIES; INDEMNIFICATION

         10.1. SCOPE OF REPRESENTATIONS OF SELLER. Except as and to the extent
expressly set forth herein, Seller makes no representations or warranties
whatsoever, and disclaim all liability and responsibility for any
representation, warranty, statement or information made or communicated (orally
or in writing) to Purchaser (including, but not limited to, any opinion,
information or advice that may have been provided to Purchaser by any affiliate,
officer, stockholder, director, employee, agent, consultant or representative of
Seller, any petroleum engineer or engineering firm, Seller's counsel or any
other agent, consultant or representative). Without limiting the generality of
the foregoing, except as and to the extent expressly set forth herein and in the
Instruments of Transfer, Seller makes no representations or warranties as to (i)
the title to any of the properties of Seller, (ii) the amounts of Hydrocarbon
reserves attributable to such properties or (iii) any geological or other
interpretations or economic evaluations. Purchaser acknowledges and affirms that
it has had full access to the records of Seller and the information contained
in, or made available or provided with respect to materials contained in, the
records of Seller, and that Purchaser has made its own independent
investigation, analysis and evaluation of the Transferred Assets, (including its
own estimate and appraisal of the extent and value of Seller's Hydrocarbon
reserves). Notwithstanding the foregoing, to the Knowledge of Seller, the
information contained in the records of Seller and information otherwise made
available or furnished in writing to Purchaser by Seller with respect to the
Transferred Assets does not contain any untrue statement of a material fact or
omit to state any material fact that would make such information not false or
misleading.

         10.2. INDEMNIFICATION OF PURCHASER. Seller agrees (i) to indemnify
Purchaser against, and hold Purchaser harmless from, any loss. damage or expense
(including reasonable attorneys' fees) sustained by Purchaser arising out of or
resulting from any inaccuracy in or breach of any of the representations,
warranties or covenants made by Seller in this Agreement, (ii) to pay, perform,
fulfill and discharge all costs, expenses and liabilities incurred in connection
with the Transferred Assets prior 


                                       20
<PAGE>   22

to the Closing Date with respect to the ownership or operation of the
Transferred Assets prior to the Closing Date and (iii) to indemnify, defend and
hold Purchaser harmless from and against any and all claims, losses, damages,
costs, expenses, causes of action and judgments of any kind or character with
respect to all liabilities, including the Retained Liabilities, arising out of
or in connection with the ownership or operation of the Transferred Assets prior
to the Closing Date, including, without limitation, any interest, penalty and
other costs and expenses incurred in connection therewith or the defense thereof
(provided that any loss, damage or expense sustained by Purchaser arising out of
or resulting from any breach or violation of Section 3.10 shall be governed by
Section 10.4); provided, however, that Purchaser shall not be entitled to assert
rights of indemnification under this Section 10.2 or Section 10.4 unless and
until the aggregate of all such losses exceeds $25,000 (it being understood that
such losses shall accumulate until such time or times as the aggregate of all
such losses exceeds $25,000, whereupon Purchaser shall be entitled to
indemnification under this Section 10.2 or Section 10.4 for any such losses);
and provided, further, that the maximum aggregate of all losses for which
Purchaser shall be entitled to indemnification by any Seller, whether under this
Section 10.2, Section 10.4 or otherwise, shall not exceed such Seller's share of
the Purchase Price.

         10.3. INDEMNIFICATION OF SELLER. Purchaser agrees (i) to indemnify
Seller against, and hold Seller harmless from, any loss, damage or expense
(including reasonable attorneys' fees) sustained by Seller arising out of or
resulting from any inaccuracy in or breach of any of the representations,
warranties or covenants made by Purchaser in this Agreement, (ii) to pay,
perform, fulfill and discharge all costs, expenses and liabilities incurred from
and after the Closing Date with respect to the ownership or operation of the
Transferred Assets from and after the Closing Date and (iii) to indemnify,
defend and hold Seller harmless from and against any and all claims, losses,
damages, costs, expenses, causes of action and judgments of any kind or
character with respect to all liabilities to third parties arising out of or in
connection with the ownership or operation of the Transferred Assets from and
after the Closing Date, including, without limitation, any interest, penalty and
other costs and expenses incurred in connection therewith or the defense thereof
(provided that any loss, damage or expense sustained by Seller arising out of or
resulting from any breach or violation of Article VIII shall be governed by
those provisions); provided, however, that Seller shall not be entitled to
assert rights of indemnification under this Section 10.3 unless and until the
aggregate of all such losses exceeds $25,000 (it being understood that such
losses shall accumulate until such time or times as the aggregate of all such
losses exceeds $25,000, whereupon Seller shall be entitled to indemnification
under this Section 10.3 for any such losses).

         10.4. ENVIRONMENTAL INDEMNITY.

                  (a) Subject to the financial limitations regarding the
         indemnity of Seller described in Section 10.2, Seller agrees, during
         the Environmental Indemnity Period, to indemnify and save Purchaser
         harmless from and against, and to reimburse Purchaser with respect to,
         any and all claims, demands, losses, damages, liabilities, causes of
         action, judgments, penalties, costs and expenses (including, without
         limitation, reasonable legal fees and expenses, clean-up costs and
         disbursements) accrued or incurred by Purchaser at any time and from
         time to time, during the Environmental Indemnity Period by reason of
         (i) the breach of any representation or warranty of Seller as set forth
         in Section 3.10, (ii) any violation with respect to or affecting the
         Transferred Assets on or before the Closing Date of any Environmental
         Laws in effect on or before the Closing Date, (iii) the clean-up of the
         Transferred Assets required under Environmental Laws for any activities
         prior to the Closing Date, (iv) any act, omission, event or
         circumstance existing or occurring on or prior to the Closing Date
         (including without limitation, the presence on the 



                                       21
<PAGE>   23

         Properties of Hazardous Substances or the presence off site of
         Hazardous Substances generated on the Properties, on or prior to the
         Closing Date) that result from or that are in connection with the
         ownership, construction, occupancy, operation, use and/or maintenance
         of the Properties, regardless of whether the act, omission, event or
         circumstance constituted a violation of any Environmental Laws at the
         time of its existence or occurrence, and (v) any and all claims or
         proceedings (whether brought by private party or Governmental
         Authority) for bodily injury, property damage, abatement or
         remediation, environmental damage or impairment or any other injury or
         damage resulting from or relating to any Hazardous Substances located
         upon the Properties prior to the Closing Date. Seller shall also
         indemnify and hold Purchaser harmless from and against any liability,
         loss, cost or expense, including reasonable attorneys' fees and
         expenses, arising from or relating to the imposition or recording of a
         lien on the Properties in connection with any contamination of the
         Properties or pursuant to any Environmental Laws in the event only that
         such contamination occurred prior to the Closing Date. Seller shall
         also hold harmless and indemnify Purchaser from any liability incurred
         by Purchaser arising out of regulatory action or third-party claims
         with respect to contamination of the Properties or offsite locations
         that occurred prior to the Closing Date.

                  (b) Notwithstanding anything contained in this Agreement to
         the contrary, the indemnities in this Section 10.4 shall survive the
         Closing Date only until the end of the Environmental Indemnity Period,
         and shall be limited in scope only to any activities discovered after
         the Closing Date but before the end of the Environmental Indemnity
         Period that occurred before the Closing Date. For all purposes with
         respect to the Transferred Assets, Purchaser agrees that it shall have
         the burden of proof that any alleged activities, violations, events or
         conditions occurred before the Closing Date.

                  (c) Seller shall have the right to control any action for
         which indemnity is required under this Section 10.4 through counsel of
         its choice, subject to Purchaser's consent, which shall not be
         unreasonably withheld or delayed, provided, however, at Purchaser's
         option, Purchaser may participate in such action and appoint its own
         counsel. If Seller does not notify Purchaser in writing of its intent
         to control such action within thirty (30) days (or five (5) days less
         than such lesser time as may be required to respond to such claims)
         after receipt by Seller of written notice of such claims, Purchaser
         shall have the right to undertake the control, conduct or settlement of
         such claims through its own counsel at Seller's expense and may settle
         such matter without Seller's consent at its sole expense. In the event
         any proposed settlement includes non-monetary relief, including
         clean-up, Purchaser may agree to such clean-up and settle such matter
         only with the consent of Seller, which consent shall not be
         unreasonably withheld or delayed; provided, however, if Seller fails to
         respond to such a notification by Purchaser regarding such non-monetary
         relief within ten (10) days after Purchaser's notification to Seller,
         Seller shall be deemed to have consented to such non-monetary relief.

                  (d) Purchaser agrees that the rights and remedies provided in
         this Section 10.4 shall be the exclusive rights and remedies available
         to it for any matter within the scope of Section 10.4 and that the
         general indemnification provisions of Section 10.2 and any other rights
         or remedies of Purchaser with respect to the Seller for any matter
         within the scope of Section 10.4, whether provided in this Agreement,
         at law or in equity, shall not be applicable and are hereby waived.
         Nothing in this Section 10.4 or elsewhere in this Agreement shall limit
         or impair any rights or remedies of Purchaser against any third party
         under any Environmental Laws, including, without limitation, any rights
         of contribution or indemnification available hereunder.


                                       22
<PAGE>   24

                  (e) Any indemnification provided in this Section 10.4 shall
         terminate at the end of the Environmental Indemnity Period, following
         which the Purchaser agrees not to institute any action or claim for
         indemnification or other recovery with respect to the matter within the
         scope of Section 10.4; provided, however, that the expiration of the
         Environmental Indemnity Period shall be extended as to any bona fide
         claim for indemnification within the scope or Section 10.4, solely to
         the extent that Purchaser asserted such claim according to the
         procedures provided in Section 10.5 and Section 10.6, if the Purchaser
         shall have transmitted the Claim Notice with respect to such claim to
         the Seller prior to the expiration of such Environmental Indemnity
         Period.

         10.5. SURVIVAL. The representations and warranties set forth in this
Agreement (other than those set forth in Article VIII) shall survive until the
second anniversary of the Closing Date, following which date none of the parties
may bring any action or present any claim for a breach of such representations
and warranties; provided, however, that there shall be no termination of any
representation or warranty as to which a bona fide claim has been asserted if
the Indemnified Party shall have transmitted the Claim Notice with respect
thereto prior to the anniversary of the Closing Date. The representations and
warranties set forth in 3.8.2 shall remain terminate in accordance with the
terms of Article VIII.

         10.6. INDEMNIFICATION PROCEDURES. All claims for indemnification under
this Agreement (other than claims for indemnification under Article VIII) shall
be asserted and resolved as follows:

         10.6.1. NOTICE. An Indemnified Party shall promptly (i) notify an
Indemnifying Party of any Third-Party Claim asserted against the Indemnified
Party and (ii) transmit to the Indemnifying Party a Claim Notice relating to
such Third-Party Claim, a copy of all papers served with respect to such claim
(if any), an estimate of the amount of damages attributable to the Third-Party
Claim and the basis of the Indemnified Party's request for indemnification under
this Agreement. During the Election Period, an Indemnifying Party shall notify
an Indemnified Party (a) whether the Indemnifying Party disputes its potential
liability to the Indemnified Party under this Article X with respect to such
Third-Party Claim and (b) whether an Indemnifying Party desires, at the sole
cost and expense of such Indemnifying Party, to defend the Indemnified Party
against such Third-Party Claim.

         10.6.2. DEFENSE BY INDEMNIFYING PARTY. If an Indemnifying Party
notifies an Indemnified Party within the Election Period that the Indemnifying
Party does not dispute its potential liability to the Indemnified Party under
this Article X and that the Indemnifying Party elects to assume the defense of
the Third-Party Claim, then the Indemnifying Party shall have the right to
defend, at its sole cost and expense, such Third-Party Claim by all appropriate
proceedings, which proceedings shall be prosecuted diligently by the
Indemnifying Party to a final conclusion or settled at the discretion of the
Indemnifying Party in accordance with this Section 10.6.2. The Indemnifying
Party shall have full control of such defense and proceedings, including any
compromise or settlement thereof; provided, however, that any settlement
entailing non-monetary consideration must be approved, in advance, by the
Indemnified Party, which approval shall not be unreasonably delayed or withheld.
The Indemnified Party is hereby authorized, at the sole cost and expense of the
Indemnifying Party (but only if the Indemnified Party is actually entitled to
indemnification hereunder or if the Indemnifying Party assumes the defense with
respect to the Third-Party Claim), to file, during the Election Period, any
motion, answer or other pleadings which the Indemnified Party shall deem
necessary or appropriate to protect its interests or those of the Indemnifying
Party and not prejudicial to the Indemnifying Party (it being understood and
agreed that if an Indemnified Party takes any such action that is prejudicial
and conclusively causes a 



                                       23
<PAGE>   25

final adjudication adverse to the Indemnifying Party, the Indemnifying Party
shall be relieved of its obligations hereunder with respect to such Third-Party
Claim). If requested by the Indemnifying Party, the Indemnified Party agrees, at
the sole cost and expense of the Indemnifying Party, to cooperate with the
Indemnifying Party and its counsel in contesting any Third-Party Claim that the
Indemnifying Party elects to contest, including, without limitation, the making
of any related counterclaim against the person asserting the Third-Party Claim
or any cross-complaint against any person. The Indemnified Party may participate
in, but not control, any defense or settlement of any Third-Party Claim
controlled by the Indemnifying Party pursuant to this Section 10.6, and shall
bear its own costs and expenses with respect to any such participation.

         10.6.3. DEFENSE BY INDEMNIFIED PARTY. If an Indemnifying Party fails to
notify an Indemnified Party within the Election Period that the Indemnifying
Party elects to defend the Indemnified Party pursuant to Section 10.6.2, or if
the Indemnifying Party elects to defend the Indemnified Party pursuant to
Section 10.2 but fails diligently and promptly to prosecute or settle the
Third-Party Claim, then the Indemnified Party shall have the right to defend, at
the sole cost and expense of the Indemnifying Party, the Third-Party Claim by
all appropriate proceedings, which proceedings shall be diligently prosecuted by
the Indemnified Party to a final conclusion or settled. The Indemnified Party
shall have full control of such defense and proceedings; and provided, however,
that without the Indemnifying Party's consent, which consent shall not be
unreasonably delayed or withheld, the Indemnified Party shall not be authorized
by the Indemnifying Party to enter into any compromise or settlement of such
Third Party Claim on any non-monetary basis; and provided further, however, that
if requested by the Indemnified Party, the Indemnifying Party shall, at the sole
cost and expense of the Indemnifying Party, cooperate with the Indemnified Party
and its counsel in contesting any Third-Party Claim that the Indemnified Party
is contesting, or, if appropriate and related to the Third-Party Claim in
question, in making any counterclaim against the person asserting the
Third-Party Claim or any cross-complaint against any person. Notwithstanding the
foregoing, if the Indemnifying Party has delivered a written notice to the
Indemnified Party to the effect that the Indemnifying Party disputes its
potential liability to the Indemnified Party under this Article X and if such
dispute is resolved in favor of the Indemnifying Party by a final, nonappealable
order of a court of competent jurisdiction, the Indemnifying Party shall not be
required to bear the costs and expenses of the Indemnified Party's defense
pursuant to this Section 10.6 or of the Indemnifying Party's participation
therein at the Indemnified Party's request, and the Indemnified Party shall
reimburse the Indemnifying Party in full for all costs and expenses of such
litigation. The Indemnifying Party may participate in, but not control, any
defense or settlement controlled by the Indemnified Party pursuant to this
Section 10.6, and the Indemnifying Party shall bear its own costs and expenses
with respect to any such participation.

         10.6.4. OTHER CLAIMS. In the event any Indemnified Party should have a
claim against any Indemnifying Party hereunder that does not involve a
Third-Party Claim, the Indemnified Party shall transmit to the Indemnifying
Party an Indemnity Notice with respect to such claim. If the Indemnifying Party
does not notify the Indemnified Party in writing within Sixty (60) days from its
receipt of the Indemnity Notice that the Indemnifying Party disputes such claim,
the claim specified by the Indemnified Party in the Indemnity Notice shall be
deemed a liability of the Indemnifying Party hereunder. If the Indemnifying
Party has timely disputed such claim, as provided above, such dispute shall be
resolved by binding arbitration.

         10.7. TAX BENEFITS, INSURANCE PROCEEDS AND INDEMNIFICATION PAYMENTS. In
determining the amount of any loss, liability or expense for which an
Indemnified Party is entitled to indemnification under this Article X, the gross
amount thereof will be reduced by any correlative insurance proceeds, if 


                                       24
<PAGE>   26

any, realized or to be realized by such Indemnified Party, and such correlative
insurance benefit shall be net of any insurance premium that becomes due as a
result of such claim.

         10.8. TAX ON INDEMNIFICATION PAYMENTS. After taking into account any
adjustment required by Section 10.6, the amount of each payment by an
Indemnifying Party under Section 10.2 and Section 10.3 shall include any
additional amount necessary to indemnify the Indemnified Party against any taxes
imposed in connection with such payment.

                                   ARTICLE XI
                                     BROKERS

         Seller has retained Reid Investments Inc. to assist and advise it in
connection with the transactions contemplated by this Agreement Seller will be
responsible for any fees payable to Reid. Purchaser and Seller represent to the
other that, except as set forth in the preceding sentence, neither has, directly
or indirectly, employed any broker, finder or intermediary in connection with
such transactions that might be entitled to a fee or commission for which the
other party shall have any obligation or responsibility upon the execution of
this Agreement or the consummation of such transactions.

                                   ARTICLE XII
                                    EXPENSES

         Except as specifically provided herein, all legal and other costs and
expenses in connection with this Agreement and the transactions contemplated
hereby shall be paid by the party that incurred such costs and expenses.

                                  ARTICLE XIII
                             NOTICES; MISCELLANEOUS

         0.1. NOTICES. All notices and other communications given hereunder
shall be in writing and shall be deemed given if delivered personally, including
delivery by a nationally recognized courier service, or mailed by registered or
certified mail, return receipt requested, to the parties at the following
addresses:

                             (i) If to Purchaser, to:

                                    Goldking Trinity Bay Corp.
                                    1221 McKinney
                                    Suite 1800
                                    Houston, Texas  77010
                                    Attention:  Leonard C. Tallerine, Jr.

                             With a copy to:

                                    Looper, Reed, Mark & McGraw
                                    9 East Greenway Plaza
                                    Suite 1717
                                    Houston, Texas  77046
                                    Attention:  Mark Licata


                                       25
<PAGE>   27

                             (ii) If to Seller to:

                                    Benton Oil & Gas Combination 
                                      Partnership 1989-1, L.P.
                                    c/o Benton Oil & Gas Company
                                    1145 Eugenia Place
                                    Carpeneria, California  93013

         13.2. MISCELLANEOUS.

         13.2.1. EXCLUSIVE AGREEMENT. This Agreement supersedes all prior
written or oral agreements between the parties with respect to the transactions
contemplated herein, and is intended as a complete and exclusive statement of
the terms of the agreement between the parties with respect to the transactions
contemplated herein.

         13.2.2. CHOICE OF LAW; CHOICE OF FORUM; AMENDMENTS; HEADINGS. This
Agreement shall be governed by the internal laws of the State of Texas, without
giving effect to principles of conflicts of laws. This Agreement may not be
changed or terminated orally. The headings contained in this Agreement are for
reference purposes only and shall not affect in any way the meaning or
interpretation of this Agreement. Terms such as "herein," "hereby," "hereto" and
"hereof" refer to this Agreement as a whole. The term "include" and derivatives
thereof are used in an illustrative sense and not a limitative sense.

         13.2.3. ASSIGNMENTS AND THIRD PARTIES. No party hereto shall assign
this Agreement or any part hereof without the prior written consent of the other
parties; provided, however, that Purchaser shall be authorized to assign this
Agreement provided that no such assignment shall release Purchaser from any of
its obligations under this Agreement. Except as otherwise provided herein, this
Agreement shall be binding upon and inure to the benefit of the parties hereto
and their respective successors and permitted assigns. Nothing in this Agreement
shall entitle any Person, other than the parties hereto or their respective
permitted successors and assigns, to any claim, cause of action, remedy or right
of any kind.

         13.2.4. SUBSEQUENT FILINGS. Effective at the Closing Date, Purchaser
shall file with General Land Office of the State of Texas and with such other
Governmental Authorities such notices or certificates as are necessary to
reflect the sale of the Transferred Assets to Purchaser.

         13.2.5. SEVERABILITY. If any term or other provision of this Agreement
is invalid, illegal or incapable of being enforced by any rule of law or public
policy, all other conditions and provisions of this Agreement shall nevertheless
remain in full force and effect so long as the economic or legal substance of
the transactions contemplated hereby is not affected in any manner materially
adverse to any party. Upon any binding determination that any term or other
provision is invalid, illegal or incapable of being enforced, the parties shall
negotiate in good faith to modify this Agreement so as to effect the original
intent of the parties as closely as possible in an acceptable and legally
enforceable manner, to the end that the transactions contemplated hereby may be
completed to the extent possible.

         13.2.6. COUNTERPARTS. This Agreement may be executed in any number of
counterparts, each of which shall be deemed to be an original and all of which
together shall constitute but one and the same agreement.


                                       26
<PAGE>   28


         13.2.7. FURTHER ASSURANCES.

                  (i) The parties each agree to deliver or cause to be delivered
         to the others on the Closing Date, and at such other times thereafter
         as shall be reasonably requested, any additional instrument that the
         other may reasonably request for the purpose of carrying out this
         Agreement.

                  (ii) After the Closing, Seller and Purchaser shall, and shall
         cause their affiliates to, execute, acknowledge and deliver all such
         further conveyances, transfer orders, division orders, notices,
         assumptions, releases and acquittances, and such other instruments, and
         shall take such further actions as may be necessary or appropriate to
         assure fully to Purchaser, its successors or assigns, all of the
         Transferred Assets intended to be conveyed to Purchaser by the
         Instruments of Transfer pursuant to this Agreement, and to assure fully
         to Seller and its affiliates and its successors and assigns, the
         assumption of the liabilities and obligations intended to be assumed by
         Purchaser pursuant to this Agreement.

         13.2.8. PRESERVATION OF BOOKS AND RECORDS. For a period of seven (7)
years (five (5) years with respect to geophysical data related to the
Transferred Assets) after the Closing Date, Purchaser and Seller (if and to the
extent Seller has retained any of the hereinafter described records not
delivered to Purchaser at Closing) shall (i) preserve and retain the corporate,
accounting, legal, auditing and other books and records that relate to the
conduct of Seller's businesses and operations prior to the Closing Date
(including, but not limited to, any documents relating to any governmental or
non-governmental actions, suits, proceedings or investigations arising out of
the conduct of the business and operations of Seller prior to the Closing Date
and including, but not limited to, all financial statements and other data and
information necessary or desirable for Purchaser to comply with their public
reporting requirements) and (ii) make such books and records available at their
then current administrative headquarters to the other party and its officers,
employees, agents and affiliates upon reasonable notice and at reasonable times,
it being understood that such other party shall be entitled to make and retain
copies of any such books and records as it shall deem necessary. Purchaser and
Seller agree to permit representatives of the other party to meet with its
employees on a mutually convenient basis in order to enable such other party to
obtain additional information and explanations of any materials provided
pursuant to this Section 13.2.8.

              -the remainder of this page left blank intentionally-

                                       27
<PAGE>   29


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

PURCHASER:                      GOLDKING TRINITY BAY CORP.

                                By:________________________________________
                                Name:______________________________________
                                Title:_____________________________________


SELLER:

                                BENTON OIL & GAS COMBINATION
                                PARTNERSHIP 1991-1, L.P.

                                By:  BENTON OIL AND GAS COMPANY,
                                     Managing General Partner

                                By:________________________________________
                                Name:______________________________________
                                Title:_____________________________________


                                       29
<PAGE>   30
                                                                      APPENDIX A


                                   Definitions

         Capitalized terms used in this Agreement shall have the meanings
ascribed to them in this Appendix A unless such terms are defined elsewhere in
this Agreement:

         Agreed Interest Rate: Ten percent (10%) per year.

         Best Efforts: A party's best efforts in accordance with reasonable
commercial practices and without the incurrence of unreasonable expense.

         Claim Notice: A written notice delivered by an Indemnified Party to an
Indemnifying Party pursuant to Section 10.6.1 describing in reasonable detail
the nature of a Third-Party Claim that could give rise to a right of
indemnification under this Agreement.

         Claimed Interest Additions: The Interest Additions claimed by Seller on
the list to be submitted to Purchaser within thirty (30) days after the date of
this Agreement pursuant to Section 6.3.

         Closing: The closing of the transactions contemplated by this
Agreement.

         Closing Date: The date of the Closing.

         Code: The Internal Revenue Code of 1986, as amended.

         Data Rooms: The data rooms prepared by Seller to provide information to
Persons considering the acquisition of the Transferred Assets.

         Defensible Title: Such title to the Transferred Interests, free and
clear of all Encumbrances other than Permitted Encumbrances, that is deducible
of record and free from reasonable doubt to the end that a prudent person
engaged in the business of the ownership, development and operation of producing
oil and gas properties, with knowledge of all the facts and the legal bearing of
such facts and the commercial effect of such facts on the continued control and
operation of the Transferred Assets, would be willing to accept such title.

         Effective Time: The effective time of the transfer of the Transferred
Assets to Purchaser, which shall be deemed to be 7:00 a.m., Houston, Texas time,
on January 1, 1995.

         Election Period: The 30-day period following receipt by an Indemnifying
Party of a Claim Notice.

         Encumbrance: Any mortgage, lien, security interest, pledge, charge,
encumbrance, claim, limitation, preferential right to purchase, consent to
assignment, irregularity, burden or defect or any other claim that Seller does
not own the Warranted Interest.

         Entity: A corporation, partnership, joint venture, trust or
unincorporated organization or association or other entity.

         Environmental Laws: All federal, state and local laws relating to the
protection of human health and safety or the environment, including but not
limited to the federal Comprehensive Environmental Response, Compensation, and
Liability Act, the Resource Conservation and Recovery Act, the Safe 


                                   Appendix A
                                     Page 1
<PAGE>   31

Drinking Water Act, the Toxic Substances Control Act, the Clean Water Act, the
Coastal Zone Management Act, the Endangered Species Act, the Oil and the
Hazardous Materials Transportation Act, all as amended, and all analogous state
and local laws.

         Environmental Indemnity Period: The period beginning on the Closing
Date and ending two (2) years after the Closing Date.

         Governmental Authority: The United States of America, any state,
commonwealth, territory or possession thereof and any political subdivision of
any of the foregoing, including but not limited to courts, departments,
commissions, boards, bureaus, agencies or other instrumentalities.

         Hazardous Substance: Any substance or material now or hereafter defined
as a "hazardous substance", "hazardous material", "hazardous waste",
"contaminant", or "pollutant" under any environmental laws, including but not
limited to Section 1.01 of the Comprehensive Environmental Response,
Compensation and Liability Act, 4-2 U.S.C.A 9601.

         Hydrocarbons: Oil, gas, minerals (including but not limited to sulfur)
and other gaseous and liquid hydrocarbons or any combination thereof.

         Indemnified Party: A party claiming indemnification under this
Agreement (other than a claim for indemnification under Section 10.4, Article VI
or Article VIII).

         Indemnifying Party: A party from whom indemnification under this
Agreement (other than indemnification under Section 10.4, Article VI or Article
VIII) is sought.

         Indemnity Notice: A written notice from an Indemnified Party to an
Indemnifying Party with respect to a claim for indemnification under this
Agreement (other than indemnification under Section 10.4, Article VI or Article
VIII) not involving a Third-Party Claim, which notice shall describe in detail
the nature of the claim and set forth an estimate of the amount of damages
attributable to such claim and the basis of the Indemnified Party's request for
such indemnification.

         Initial Payment: The initial payment of the Purchase Price in the
amount of FOUR THOUSAND NINE HUNDRED TWENTY-NINE DOLLARS ($4,929), paid by
Purchaser to Seller, on the date this Agreement was executed.

         Knowledge: The actual knowledge of each executive officer of Seller
(assuming such Seller is a corporation, and if not, a Person in a similar
capacity) after reasonable inquiry, or Purchaser, as the case may be.

         Leases: As defined in the Instruments of Transfer.

         Legal Requirement: Any law, statute, ordinance, decree, requirement,
order, judgment, rule or regulation of, including the terms of any license or
permit issued by, any Governmental Authority.

         Material Adverse Effect: Any material adverse effect on or with respect
to the Transferred Assets or on the business, operations, prospects or condition
of the Transferred Assets, taken as a whole.

         Net Revenue Interest: The interest (expressed as a percentage) of
Seller in and to Hydrocarbons produced from or allocated to a Property after
deducting all applicable Production Burdens.

         NGA: The Natural Gas Act of 1938.

         NGPA: The Natural Gas Policy Act of 1978.

                                   Appendix A
                                     Page 2

<PAGE>   32

         Permitted Encumbrances: Any or all of the following:

         (i) encumbrances that arise under operating agreements to secure
payment of amounts not yet delinquent and are of a type and nature customary in
the oil and gas industry;

         (ii) encumbrances that arise as a result of pooling and unitization
agreements, and production sales contracts securing the payment of amounts not
yet delinquent;

         (iii) consents to assignment by Governmental Authorities (a) that are
obtained on or prior to the Closing Date or (b) that are customarily obtained
after the consummation of transactions of the nature contemplated by this
Agreement;

         (iv) conventional rights of reassignment obligating Seller to reassign
its interest in any portion of the Properties to a third party in the event it
intends to release or abandon such interest prior to the expiration of the
primary term or other termination of such interest;

         (v) easements, rights-of-way, servitudes, permits, surface leases,
surface use restrictions and other surface uses and impediments on, over or in
respect of any of the Properties that are not such as to interfere materially
with the operation, value or use of any of the Properties;

         (vi) such Title Defects and Environmental Defects as Purchaser has
expressly waived in writing;

         (viii) such Title Defects for which Purchaser failed to give timely
notice according to Section 6.2;

         (ix) such Environmental Defects (to the extent the Purchaser has
Knowledge of such Environmental Defect) for which Purchaser failed to give
timely notice according to Section 6.2 or for which Purchaser failed to provide
written information as required by Section 6.2;

         (x) rights reserved to or vested in any municipality or governmental,
tribal, statutory or public authority to control or regulate any of the
Properties in any manner, and all applicable laws, rules and orders of any
municipality or governmental or tribal authority;

         (xi) all production burdens that do not operate to (A) reduce the Net
Revenue Interest below the Warranted Interest or (B) increase the Working
Interest above the Warranted Interest;

         (xii) the preferential purchase rights for which waivers have been
obtained prior to the Closing Date;

         (xiii) the terms and conditions of the Contracts, insofar and only
insofar as the Contracts do not operate to (A) reduce the Net Revenue Interest
of Seller below that set forth on Exhibit A hereto, (B) increase the Working
Interest of Seller above that set forth on Exhibit A hereto without a
proportionate increase in the Net Revenue Interest of Seller;

         (xiv) any other Encumbrance affecting any portion of a Transferred
Asset that individually does not materially adversely affect the operation,
value or use of any such Transferred Asset; and

         (xv) solely during the period prior to the Closing, any Encumbrance
that is released on or before Closing.

         Person: shall mean a corporation, an association, a partnership, an
organization, a business, an individual, a government or political subdivision
thereof, or a governmental agency.

                                   Appendix A
                                     Page 3
<PAGE>   33


         Production Burdens: All royalty interests, overriding royalty
interests, production payments, net profits interests or other similar interests
that constitute a burden on, are measured by or are payable out of the
production of Hydrocarbons or the proceeds realized from the sale or other
disposition thereof.

         Purchase Price Adjustment Amount: The net adjustment to the Purchase
Price to be made pursuant to Section 1.3.1.

         Purchase Price Adjustment Certificate: A statement of the Purchase
Price Adjustment Amount (specifying whether the Purchase Price is to be
increased or decreased by such amount), which shall be certified by an officer
of Seller.

         Seller's Affiliate: Any person that directly or indirectly, through one
or more intermediaries, controls, is controlled by or is under common control
with, such Seller.

         Subsidiary: shall mean, as to a Person, any other Person (a) more than
50% of the outstanding voting stock of which is held, directly or indirectly, by
such Person, or (b) over which such Person has the power, directly or
indirectly, to designate a majority of the directors thereof (if such other
Person is a corporation) or the individuals exercising similar functions (if
such other Person is unincorporated).

         Third-Party Claim: A third-party claim asserted against an Indemnified
Party that could give rise to a right of indemnification under this Agreement
(other than a right of indemnification under Section 10.4, Article VI or Article
VIII).

         Transferred Assets: As defined in Section 1.1.

         Warranted Interests: Those interests whereby a Seller is (i) entitled
to receive not less than the "Net Revenue Interest" set forth on Exhibit A
hereto of all oil, gas and associated liquid and gaseous Hydrocarbons produced,
saved and marketed from the Properties, without reduction, throughout the
productive life of such Properties and (ii) obligated to bear the percentage of
the costs and expenses related to the maintenance, development and operation of
the Properties in an amount not greater than the "Working Interest" set forth on
Exhibit A hereto, without increase, throughout the productive life of such
Properties, except increases that result in a proportionate increase in such
Seller's Net Revenue Interest and increases that results from contribution
requirements with respect to defaulting co-owners.

         Working Interest: The interest (expressed as a percentage) of a Seller
in any Transferred Asset before giving effect to any applicable Production
Burdens and the percentage of all costs and expenses associated with the
exploration, development and operation of such Transferred Asset required to be
borne by such Seller.

                                   Appendix A
                                     Page 4
<PAGE>   34



                                 SCHEDULE 1.2.1

                         INDIVIDUAL INTEREST VALUATIONS

<TABLE>
<CAPTION>
                                                   WORKING              NET REVENUE            PURCHASE
SELLER                                             INTEREST             INTEREST               PRICE
<S>                                                <C>                  <C>                    <C>        
Benton Oil & Gas Combination                       4.928910%            4.115640%              $377,062.00
Partnership 1989- 1, L. P.,
a California limited partnership
</TABLE>

<PAGE>   35

                 BILL OF SALE, CONVEYANCE AND PARTIAL ASSIGNMENT

STATE OF TEXAS             Section.
                           Seciton.
COUNTY OF CHAMBERS         Section.

         This Bill of Sale, Conveyance and Partial Assignment is from BENTON OIL
& GAS COMBINATION PARTNERSHIP 1989-1, L.P., a California limited partnership,
whose mailing address is 1145 Eugenia Place, Carpinteria, California
("Grantor"), to GOLDKING TRINITY BAY CORP., a Texas corporation ("Grantee"),
whose mailing address is 1221 McKinney, Suite 1800, Houston, Texas 77002.

                                       I.

         NOW, THEREFORE, for and in consideration of Ten and No/100 Dollars
($10.00) and other good and valuable consideration, the receipt and sufficiency
of which are hereby acknowledged, Grantor has granted, bargained, sold,
transferred, assigned and conveyed, and by these presents does hereby grant,
bargain, sell, transfer, assign and convey unto Grantee, its successors and
assigns, subject to the hereinafter stated exceptions, restrictions, covenants
and conditions, all of Grantor's interest in and to the following described
properties, to-wit:

         (a)      The leasehold estate created by each of the Oil, Gas and
                  Mineral Leases listed and described in Exhibit "A", which is
                  annexed hereto and incorporated herein for all purposes, such
                  leases being hereinafter sometimes referred to as "Subject
                  Leases";

         (b)      All payments out of production, overriding royalty interests,
                  carried interests, reversionary interests, and all other
                  rights and interests, incident to, or held and owned by
                  Grantor in connection with the Subject Leases, save and except
                  the overriding royalty excepted and reserved herein below by
                  Grantor;

         (c)      All oil, gas, condensate, casinghead gas and other related
                  hydrocarbon substances produced and saved subsequent to the
                  Effective Date of this conveyance from lands covered and
                  affected by the Subject Leases. (The interest described under
                  subparagraphs (a) and (b) above, and this subparagraph (c) are
                  hereinafter sometimes collectively referred to as "Subject
                  Properties");

         (d)      All personal property and facilities located on lands covered
                  by the Subject Leases or the Subject Interests, or both,
                  incident to or held and used in connection with the Subject
                  Interests, including, but not limited to, all tanks, tanks
                  batteries, gas plants, disposal facilities, buildings,
                  structures, platforms, field separators and liquid extractors,
                  treators, dehydrators, compressors, pumps, pumping units,
                  valves, fittings, machinery and parts, engines, boilers,
                  meters, apparatus, implements, tools, appliances, cables,
                  wires, towers, casing, tubing and rods, gathering lines or
                  other pipelines, field gathering systems and any and all other
                  fixtures and equipment of every type and description to the
                  extent that the same are used or held in connection with the
                  ownership or operation of the Subject Interests;

         (e)      All oil, natural gas or water source wells, whether producing,
                  operating, shut-in, or temporarily abandoned; all types of
                  injection wells; and all equipment used or held by Grantor in
                  connection with the production of oil, gas, condensate,
                  casinghead gas and other related hydrocarbon substances from
                  or attributable to lands covered by the Subject Leases;


                                       1
<PAGE>   36

         (f)      All tenements, appurtenances, surface leases, easements,
                  permits, licenses, servitudes, or rights-of-way in any way
                  appertaining, belonging, affixed and used in connection with,
                  or incident to, the ownership and operation of the Subject
                  Interest, including, but not limited to, those tenements,
                  appurtenances, surface leases, easements, permits, licenses,
                  servitudes or rights-of-way listed and described in Exhibit
                  "B", annexed hereto and incorporated herein for all purposes;

         (g)      All leases, options, rights of first refusal, orders,
                  contracts, operating agreements, bottom-hole agreements,
                  farmin/farmout agreements, acreage contribution agreements,
                  unit agreements, processing agreements, maintenance
                  agreements, purchase and sale agreements for gas, oil or other
                  minerals, and other agreements and instruments to the extent
                  that same relate, appertain, belong or are in any way
                  incidental to the ownership of the Subject Interests by
                  Grantor, including, but not limited to, those listed and
                  described in Exhibit "C", annexed hereto and incorporated
                  herein for all purposes;

         (h)      All lease files, land files, well files, abstracts, title
                  opinions, title curative, accounting records, royalty payment
                  records, seismic records and surveys, gravity maps, electric
                  logs, contracts, correspondence, microfiche lists, geological
                  and geophysical maps, pressure date and decline curves,
                  graphical production curves and other geological or
                  geophysical data, records and other documents and records of
                  every kind and description which relate to and are possessed
                  by Grantor in connection with the Subject Interests, to the
                  extent and as provided for or limited by that certain Purchase
                  and Sale Agreement dated effective April 1, 1989 by and
                  between Grantor and Texaco Producing Inc.; and

         (i)      Any and all monies held by any individual, partnership, or
                  corporate entity, whether or not such monies are held in
                  escrow, payable to either Texaco Producing Inc. or Grantor, or
                  both, for oil, gas condensate, casinghead gas or other related
                  hydrocarbon substance produced and saved from or attributable
                  to the Subject Leases and purchased by such individual,
                  partnership or corporate entity subsequent to the Effective
                  Date of this conveyance.

               The interests described under subparagraphs (a) through (i)
hereinabove are herein sometimes collectively referred to as "Subject
Interests".

                                       II.

         This Bill of Sale, Conveyance and Assignment is made by Grantor and
accepted by Grantee subject to the following:

         (a)      All terms, conditions and obligations contained and provided
                  for in the Subject Leases;

         (b)      The terms and conditions of all existing orders, rules,
                  regulations and ordinances of any federal, state or other
                  governmental agency that are applicable or related to the
                  Subject Interests;

         (c)      The terms and conditions of the Purchase and Sale Agreement,
                  dated the same date as this conveyance instrument, by and
                  between Grantor, as a Seller and Grantee as the Purchaser,
                  concerning the Subject Interests; and

         (d)      Grantee accepting the Subject Interest in its "as is, where
                  is" condition; Grantor disclaiming any and all liability
                  arising in connection with any environmental matters,
                  including, without limitation, any presence of naturally
                  occurring radio-active material on the property; and Grantee
                  expressly waiving the provisions of Chapter XVII, Subchapter
                  E, Sections 17.41 through 17.63, inclusive, except Section
                  17.555 which is 


                                       2
<PAGE>   37
                  not waived, of Vernon's Texas Code Annotated, Business and
                  Commerce Code. In addition, there are no warranties or
                  representations, either express or implied, as to the quality
                  or quantity of the hydrocarbon reserves, if any, attributable
                  to the interest conveyed herein or the ability of the property
                  to produce hydrocarbons.

         TO HAVE AND TO HOLD all and singular the Subject Interest, as
hereinabove described, unto Grantee, its successors and assigns, and Grantor,
for itself, its successors and assigns, does hereby WARRANT AND FOREVER DEFEND,
all and singular, title to the Subject Interests, free from all liens, claims,
assessments and encumbrances, other than the existing burdens, unto Grantee,
Grantee's successors and assigns, against every person lawfully claiming or to
claim the same, or any part hereof, BY, THROUGH OR UNDER GRANTOR, BUT NOT
OTHERWISE. The reference herein to the "existing burdens" is for the purpose of
protecting Grantor on Grantor's warranties, and shall not create, nor constitute
a recognition of any rights in third parties. Grantor grants unto Grantee full
power and right of substitution and subrogation in and to all covenants and
warranties by others heretofore given or made in respect of the Subject
Interests.

                                      III.

The provisions hereof shall inure to the benefit of and be binding upon the
parties hereto, their respective legal representatives, successors and assigns.

         IN TESTIMONY WHEREOF, this Conveyance is executed on the dates and at
the places indicated in the respective acknowledgments below, but is stipulated
herein to be effective as of 7:00 a.m., C.D.S.T., the 1st day of January, 1995.

GRANTOR:                                BENTON OIL & GAS COMBINATION
                                        PARTNERSHIP 1989-1, L.P.



                                        By: _______________________________


                                       3
<PAGE>   38



                                [acknowledgments]



                                       4

<PAGE>   1

                                                                   EXHIBIT 2.2

                           ASSET PURCHASE AGREEMENT

                                    BETWEEN


             BENTON OIL & GAS COMBINATION PARTNERSHIP 1990-1, L.P.,
                        A CALIFORNIA LIMITED PARTNERSHIP


                                     SELLER


                                       AND

                           GOLDKING TRINITY BAY CORP.

                                    PURCHASER


                          FOR THE SELLER'S INTEREST IN

                             THE PROPERTIES KNOWN AS


                              UMBRELLA POINT FIELD


                                  JUNE 30, 1995


<PAGE>   2

                            ASSET PURCHASE AGREEMENT

This ASSET PURCHASE AGREEMENT (this "Agreement") dated as of June 30, 1995 by
and between Goldking Trinity Bay Corp., a Texas corporation, ("Purchaser") and
Benton Oil & Gas Combination Partnership 1990-1, L.P., a California limited
partnership ("Seller");

                              W I T N E S S E T H:

           WHEREAS, Seller owns the working interest and net revenue interest
set forth opposite such Seller's name on Schedule 1.2.2;

           WHEREAS, Seller desires to sell to Purchaser the Transferred Assets,
and Purchaser desires to purchase from Seller the Transferred Assets, upon the
terms and subject to the conditions hereinafter set forth; and

           NOW, THEREFORE, in consideration of the premises and of the
respective representations, warranties, covenants, agreements and conditions
contained herein, the parties hereto hereby agree as follows

                                    ARTICLE I
                                PURCHASE AND SALE

         Unless defined elsewhere in this Agreement, all capitalized terms used
herein shall have the respective meanings given them in Appendix A hereto, which
is incorporated herein by reference and shall be deemed to be a part of this
Agreement for all purposes.

         1.1 CONVEYANCE AND TRANSFER OF TRANSFERRED ASSETS. Seller and Purchaser
hereby agree that, at the Closing, upon the terms and subject to the conditions
of this Agreement, Seller shall convey, transfer and assign to Purchaser, the
Transferred Assets.

         For purposes of this Agreement, the term "Transferred Assets" shall
mean all of each Seller's right, title and interest in certain oil and gas
properties located in Galveston Bay, including all of each Seller's right, title
and interest in and to the following assets:

                  (a) All of the oil and gas leases, oil, gas and mineral leases
         as described in Exhibit A attached hereto and incorporated herein
         (collectively referred to hereinafter as the "Leases" and individually
         as a "Lease"), and the leasehold estates created thereby, and the fee,
         mineral, royalty and overriding royalty interests, net profits
         interests, payments out of production and other real property interests
         described in Exhibit A, together with each and every kind and character
         of right, title, claim or interest that Seller has in and to the lands
         covered thereby, even though the interests of Seller therein may be
         incorrectly described, stated or limited on Exhibit A (collectively the
         "Properties", or singularly, a "Property"), together with all of each
         Seller's right, title and interest in and to all the property and
         rights incident thereto, including without limitation all of Seller's
         right, title and interest in and to:

                           (i) the rights, privileges, benefits and powers
                  conferred upon the holder of any Property with respect to the
                  use and occupation of the surface of, and the subsurface
                  depths under, the land covered by such Property that may be
                  necessary, convenient or incidental to the possession and
                  enjoyment of such Property;


<PAGE>   3

                           (ii) the rights in any pooled, communitized or
                  unitized acreage included in whole or in part in any Property,
                  including all production from the unit, pool or communitized
                  area allocated to any such Property, and all interests in any
                  wells within the unit, pool or communitized area allocated to
                  such Property, whether such unit or pool production comes from
                  wells located within or without the areas covered by a
                  Property; and

                           (iii) all tenements, hereditaments and appurtenances
                  belonging to such Properties;

                  (b) All of each Seller's right, title and interest in and to
         the rights-of-way, easements, servitudes, permits, licenses,
         franchises, certificates of public convenience and necessity and
         similar rights and privileges, and other rights and interests in land
         primarily owned or used in connection with the Properties;

                  (c) All of each Seller's right, title and interest in and to
         all real, personal and mixed property and fixtures located at the
         Closing on the Properties or the aforesaid rights-of-way, easements and
         other related properties, or primarily used or held for use in
         connection with the ownership, management, development, exploration or
         operation of the Transferred Assets, including without limitation all
         of each Seller's right, title and interest in and to all wells, well
         equipment, platforms, pipes, valves, boilers, compressors, separators,
         heaters, dehydrators, gauges, meters and other measuring equipment,
         regulators, extractors, communication equipment, gas gathering systems,
         casing, tubing pipelines, power lines, fuel lines, generators, pumps,
         motors, buildings, storage tanks and facilities, improvements,
         fittings, machinery, equipment (including, without limitation, personal
         computers and related peripheral equipment located in the field and
         software that is legally transferable without cost), supplies, spare
         parts, materials and inventories, other than inventories of
         Hydrocarbons in storage tanks or other facilities above the pipeline
         connection to each such storage tank or facility, and in gas pipelines
         downstream from the delivery point sales meters on such pipelines
         existing as of the Effective Time;

                  (d) All of each Seller's right, title and interest in and to
         all contracts, agreements, leases, and/or other arrangements, presently
         owned or acquired as a result of any agreement in existence prior to
         the Closing, including all causes of action pursuant thereto, to the
         extent used in connection with the ownership, management, development,
         exploration or operation of the Transferred Assets, including without
         limitation, all gas purchase and sale agreements, crude purchase and
         sale agreements, natural gas liquids purchase and sale agreements,
         farmin or farmout agreements, exchange agreements bottom hole
         agreements, dry hole agreements, acreage contribution agreements,
         support agreements, seismic agreements, exploration agreements, joint
         venture agreements, operating agreements, unit agreements, pooling and
         communitization agreements, orders or declarations, balancing
         agreements, gas and natural gas liquids processing agreements,
         gathering and transportation agreements, construction and operation
         agreements, options, liens, security interests, vendor financing
         agreements, surface leases, subleases and leases of equipment or
         facilities to the extent used or primarily useful in connection with
         the ownership, management, development, exploration or operation of the
         Transferred Assets and reasonably separable from Seller's other
         material rights in the contracts not used in connection with the
         Transferred Assets; provided, however, that no insurance 


                                       2
<PAGE>   4

         contract or other insurance arrangement shall be included in the
         Transferred Assets (collectively, the "Contracts");

                  (e) All of each Seller's right, title and interest in and to
         all Hydrocarbons produced from or attributable to, the Properties and
         proceeds attributable thereto, at and after the Effective Time (subject
         to the provision of Section 1.3); provided, however, that all
         Hydrocarbons in storage tanks and other facilities above the pipeline
         connection to each such storage tank or facility, or in gas pipelines
         downstream from the delivery point sale meters on such pipelines at the
         Effective Time, shall remain the property of Seller; and

                  (f) All of each Seller's right, title and interest in and to
         all property and rights incident or attributable to the foregoing
         interests, including, without limitation all of each Seller's right,
         title and interest in and to:

                           (i) subject to the limitations of Section 13.2.8,
                  originals (or, to the extent that originals are not available,
                  copies) of all books, records, files, contracts, muniments of
                  title, reports, surveys and similar documents or materials,
                  including computer tapes, disks and data with respect to any
                  of the foregoing records, that relate to the foregoing
                  interests, including without limitation, the purchase,
                  exchange, operation, administration, sale or marketing
                  thereof, or that constitute evidence of ownership thereof, to
                  the extent such records are reasonably separable from Seller's
                  corporate records, and excluding work product of Seller's
                  legal counsel (other than title opinions) and documents
                  relating to the negotiation and consummation of the
                  transactions contemplated by this Agreement (collectively, the
                  "Records");

                           (ii)(A) the proprietary geological, geophysical and
                  seismic data, materials and information (the "Proprietary
                  Data"), (B) the non-proprietary geological, geophysical and
                  seismic data, materials and information the transfer of which
                  is not prohibited by any copyright or validly existing third
                  party agreement, that is transferable to Purchaser without
                  payment of a transfer fee or other consideration, (C) the
                  maps, interpretations, records and other technical information
                  related to or based upon the Proprietary Data and not related
                  to or based upon the Non-Proprietary Data (the "Proprietary
                  Information") and (D) the maps, interpretations, records and
                  other technical information related to or based upon any
                  combination of the Proprietary Data and the Non-Proprietary
                  Data (the "Combined Information" and collectively, the
                  "Evaluation Data"); and

                           (iii) all division orders, purchase orders, invoices,
                  storage or warehouse receipts, bills of lading and
                  certificates of title to the extent the same are attributable
                  or relate to any of the Transferred Assets, and all documents,
                  instruments, general intangibles and chattel paper primarily
                  related to any of the Transferred Assets (other than the
                  bonds, letters of credit and guarantees posted with
                  governmental agencies, which are expressly reserved by Seller)
                  and all estimated prepayments of royalty obligations of Seller
                  with any federal or state authorities that are directly
                  related to the Transferred Assets and that are transferable to
                  Purchaser;

provided, however, that the Transferred Assets shall not include (i) any rights
and causes of action by Seller to receive amounts (or rights to production from
the Properties prior to the Effective Time) pursuant to the Retained Liabilities
and (ii) rights and causes of action with respect to the Lawsuits and 


                                       3
<PAGE>   5

the facts and circumstances giving rise to such Lawsuits as retained by Seller
and more particularly described in Section 1.4.

         1.2. PURCHASE PRICE AND PURCHASE PRICE ALLOCATION.

         1.2.1 PURCHASE PRICE. The aggregate purchase price (the "Purchase
Price") for the Transferred Assets shall be ONE MILLION EIGHTY-FIVE THOUSAND SIX
HUNDRED SEVENTY-FIVE DOLLARS ($1,085,675) subject to adjustments as set forth in
Section 1.3., of which FOURTEEN THOUSAND ONE HUNDRED NINETY-TWO DOLLARS
($14,192) ("Initial Payment") shall be paid to the Seller in immediately
available funds upon delivery to Purchaser by Seller of counterparts of this
Agreement executed by Seller at the Closing, The Purchase Price, less the amount
of the Initial Payment (the "Cash at Closing") and as adjusted as provided in
the Purchase Price Adjustment Certificate described in Section 1 3.2, shall be
paid to Seller by wire transfer in federal or otherwise immediately available
funds. Simultaneously therewith, Seller shall execute and deliver, effective as
of the Effective Time, the Instruments of Transfer.

         1.2.2 PURCHASE PRICE ALLOCATION. The Purchase Price shall be allocated
among the types and classes of assets constituting the Transferred Assets as set
forth on a schedule to be provided by Purchaser and Seller at Closing.

         1.3 ADJUSTMENTS TO PURCHASE PRICE.

         1.3.1. ADJUSTMENTS. In addition to any adjustments pursuant to Article
VI, the Cash at Closing shall be adjusted as follows:

                           (i) The Cash at Closing shall be increased by the
                  following:

                                    (a) An agreed upon amount representing the
                           value of all merchantable oil in storage above the
                           pipeline connection at the Effective Time that is
                           credited to the Properties;

                                    Solely to the extent related to the
                           Transferred Assets, the amount of (1) all actual
                           direct operating expenditures, (2) all capital
                           expenditures and (3) all costs and expenses that are
                           incurred by Seller in connection with, or are
                           otherwise allocable to, the operation of the
                           Transferred Assets under the terms of the joint
                           operating agreement during the period of time after
                           the Effective Time;

                                    The amount of any Taxes that have been paid
                           by Seller on or prior to the Closing that are
                           attributable to the time after the Effective Time and
                           for which Purchaser is liable pursuant to Article
                           VIII.

                           (ii) The Cash at Closing shall be decreased by the
                  following:

                                    (a) The proceeds that are received by, or
                           payable to, Seller or any other person and that are
                           attributable to the operation of the Transferred
                           Assets for the period of time between the Effective
                           Time and the Closing; and


                                       4
<PAGE>   6

                                    (b) Any amount agreed upon by Purchaser and
                           Seller as the value of any Title Defects, less any
                           amount agreed upon by Purchasers and Seller as the
                           value of any Title Benefits.

         1.3.2 CLOSING ESTIMATE. At least three (3) business days prior to the
Closing Date, Seller on behalf of Seller, shall estimate the Purchase Price
Adjustment Amount and deliver to Purchaser a certificate of an officer of Seller
setting forth in reasonable detail the calculation thereof. The Cash at Closing
shall be adjusted as set forth in such certificate. The Purchase Price
Adjustment Certificate shall include a computation of any reduction in the
Purchase Price caused by the failure of one or more Seller's to deliver on the
Closing Date their respective interests in the Transferred Assets.

         1.3.3 PURCHASE PRICE ADJUSTMENT CERTIFICATE. As soon as reasonably
practicable, and in any event within sixty (60) days following the Closing Date,
Seller shall deliver to Purchaser the Purchase Price Adjustment Certificate.
Within thirty (30) days after delivery of the Purchase Price Adjustment
Certificate, Purchaser shall notify Seller on behalf of Seller, whether
Purchaser agrees or disagrees with the determination of the Purchase Price
Adjustment Amount set forth in the Purchase Price Adjustment Certificate. If
Purchaser disagrees with such determination, representatives of Purchaser and
Seller shall meet and endeavor to resolve their differences regarding the
determination of the Purchase Price Adjustment Amount. If the representatives of
Purchaser and Seller are unable to agree upon such determination of the Purchase
Price Adjustment Amount within twenty (20) business days after Purchaser's
receipt of such notification, Seller shall select an independent accounting firm
from a list of three (3) such firms provided by Purchaser, which firm shall
audit the Purchase Price Adjustment Certificate and determine the Purchase Price
Adjustment Amount. The decision of such independent accounting firm shall be
binding on Seller and Purchaser, and the fees and expenses of such independent
accounting firm shall be borne one-half by Seller and one-half by Purchaser.

         1.3.4 PAYMENT OF PURCHASE PRICE ADJUSTMENT AMOUNT. If the Purchase
Price Adjustment Amount as finally determined pursuant to Section 1.3.3 is a
smaller upward adjustment or a larger downward adjustment than that estimated
pursuant to Section 1.3.2, Seller shall pay to Purchaser the amount of such
excess plus interest thereon at the Agreed Interest Rate from (and including)
the Closing Date to (but excluding) the date of payment. If the Purchase Price
Adjustment Amount as finally determined pursuant to Section 1.3.3 is a larger
upward adjustment or a smaller downward adjustment than that estimated pursuant
to Section 1.3.2, Purchaser shall pay to Seller the amount of such deficiency
plus interest thereon at the Agreed Interest Rate from (and including) the
Closing Date to (but excluding) the date of payment. Any payments contemplated
by this Section 1.3.4 shall be made by wire transfer in federal or other
immediately available funds on or before the fifth business day following the
final determination of the amount thereof.

         1.4 RETAINED RIGHTS AND CLAIMS. Notwithstanding any provision herein to
the contrary, Transferred Assets shall not include any rights or claims of
Seller with respect to the facts and circumstances giving rise to those certain
proceedings collectively referred to as the "Lawsuits" and filed:

                  In the Matter of the Libel and Petition of Exxon Corporation,
                  as Owner of the M/V "Bobcat," and Williamson Boat Works, as
                  Charterer of the M/V "Bobcat," her engines tackle, apparel,
                  etc., in a cause of exoneration from or limitation of
                  liability; C.A. No. C-91-203, United States District Court for
                  the Southern District of Texas, Corpus Christi Division; and

                                       5
<PAGE>   7


                  French Production Incorporated v. Exxon Corporation d/b/a
                  Exxon Company USA, Williamson Boat Works and Captain B.J.
                  Shirley; No. 91-040865, District Court of Harris County,
                  Texas, 295th Judicial District.

         1.5 LIABILITIES ASSUMED AND RETAINED.

         1.5.1 ASSUMED LIABILITIES. Purchaser shall assume and agree to pay,
perform and discharge in the ordinary course of business, only those
liabilities, debts or obligations of Seller that are set forth below (the
"Assumed Liabilities"):

                  (i) all liabilities and obligations of or relating to the
         Transferred Assets accruing after the Effective Time:

                  (ii) all liabilities and obligations that accrue after the
         Effective Time, pursuant to the Leases that have been properly
         consented to and assigned; and

                  (iii) all liabilities and obligations that accrue after the
         Effective Time, pursuant to the Contracts that have been properly
         consented to and assigned.

         1.5.2 RETAINED LIABILITIES. Except for the Assumed Liabilities,
Purchaser shall not assume and Seller shall retain and agree to pay, perform and
discharge in the ordinary course of business all liabilities, debts or
obligations of any nature that arise out of or result from any occurrence,
transaction or event occurring prior to the Closing Date relating to the
operation, ownership or use of the Transferred Assets, whether accrued,
absolute, contingent or otherwise, whether due or to become due, including
without limitation any such liability of Seller related to the Lawsuits (the
"Retained Liabilities"); provided however, that Retained Liabilities shall not
include any liability accruing after the Effective Time based on the violation
or alleged violation of any statute, ordinance, rule, regulation, order or other
law of any state, federal, county, local or other governmental subdivision, due
to any occurrence, transaction or event occurring prior to the Effective Time,
which occurrence, transaction or event was not a violation of any laws existing
as of the Effective Time. The Retained Liabilities shall include any liabilities
with respect to the facts and circumstances giving rise to the Lawsuits.

                                   ARTICLE II
                                   THE CLOSING

         2.1 CLOSING. The Closing shall take place at the offices of Purchaser,
in Houston, Texas at 9:00 a.m. on December 31, 1995 or such earlier or later
date as provided hereafter.

         2.2 INSTRUMENTS OF TRANSFER. Seller shall execute and deliver at
Closing the Bill of Sale, Conveyance and Assignment, the form of which is
attached as Exhibit "B" and any other instruments of transfer sufficient to
convey to Purchaser the Transferred Assets, including without limitation the
following (the "Instruments of Transfer"):

                  (a) any personal property included in the Transferred Assets;

                  (b) the Leases, assignment of leasehold interests;

                  (c) the Contracts; and


                                       6
<PAGE>   8

                  (d) the Properties.

                                   ARTICLE III
                    REPRESENTATIONS AND WARRANTIES OF SELLER

         Seller hereby represents, warrants and covenants as follows:

         3.1 ORGANIZATION AND GOOD STANDING. Seller is a partnership duly
organized, validly existing and in good standing under the laws of its
jurisdiction of formation and has all requisite power and authority to own and
lease the properties and assets it owns and leases and to carry on its business
as such business is conducted.

         3.2 SUBSIDIARIES. No Seller has any Subsidiaries that own any of the
Transferred Assets.

         3.3 AUTHORITY; AUTHORIZATION OF AGREEMENT. Seller at closing will have
all requisite power and authority to execute and deliver this Agreement, the
Instruments of Transfer and each of the other agreements and documents
contemplated, to consummate the transactions contemplated hereby and thereby and
to perform all the terms and conditions to be performed by it. The execution and
delivery of this Agreement, the Instruments of Transfer and each of the other
agreements and documents contemplated, the performance of all the terms and
conditions to be performed by Seller and the consummation of the transactions
contemplated hereby and thereby will be duly authorized and approved by the
partners of Seller. This Agreement, the Instruments of Transfer and each of the
other agreements and documents contemplated, have been duly executed and
delivered by each Seller and constitutes the valid and binding obligation of
each Seller, enforceable against such Seller in accordance with its terms,
except as such enforceability may be limited by bankruptcy, insolvency or other
laws relating to or affecting the enforcement of creditors' rights generally and
general principles of equity (regardless of whether such enforceability is
considered in a proceeding in equity or at law).

         3.4 NO VIOLATIONS. Subject to Article VII (7) 2.4., this Agreement, the
Instruments of Transfer and each of the other agreements and documents
contemplated hereby or thereby, and the execution and delivery hereof by Seller
does not, and the fulfillment and compliance with the terms and conditions
hereof and thereof and the consummation of the transactions contemplated hereby
and thereby will not:

                  (i) conflict with, or require the consent of any Person under,
         any of the terms, conditions or provisions of the partnership agreement
         of the Seller;

                  (ii) violate any provision of the Code, the NGA or the NGPA,
         or require any filing, consent, authorization or approval under, any
         Legal Requirement applicable to or binding upon Seller, other than the
         consent to the transfer and assignment of Leases by the General Land
         Office of the State of Texas, which consent Seller shall obtain as soon
         as possible following the Closing;

                  (iii) conflict with, result in a breach of, constitute a
         default under (without regard to requirements of notice or the lapse of
         time or both), accelerate or permit the acceleration of the performance
         required by, or require any consent, authorization or approval under,
         (a) any mortgage, indenture, loan, credit agreement or other agreement
         or instrument evidencing 


                                       7
<PAGE>   9

         indebtedness for borrowed money or any Contract to which Seller is a
         party, or by which Seller is bound or to which any of its properties
         are subject or (b) any Lease to which Seller is a party or by which it
         is bound or to which any of its properties are subject; or

                  (iv) result in the creation or imposition of any Encumbrance
         upon the Transferred Assets;

which violation, breach or Encumbrance with respect to the matters specified in
clauses (ii) through (iv) of this Section 3.4 have had or would reasonably be
expected to have a Material Adverse Effect.

         3.5 NO DEFAULT. Seller is not in default under, and no condition exists
that with notice or lapse of time or both would constitute a default under, (i)
any mortgage, indenture, loan, credit agreement or other agreement or instrument
evidencing indebtedness for borrowed money or (ii) any Contract or Lease to
which Seller is a party or by which Seller is bound or to which any of the
Transferred Assets is subject.

         3.6 ABSENCE OF CERTAIN CHANGES. Since the Effective Time, there has not
been any material damage, destruction or loss to, or of, the Transferred Assets,
that has not been covered by insurance.

         3.7 TAXES. All returns, statements and reports with respect to Taxes
that are required to be filed by Seller on or before the Closing have been (or
will have been by the Closing) timely filed with the appropriate Governmental
Authorities and all such Taxes shown thereon its due have been (or will have
been by the Closing) paid or deposited.

         3.8 DEFENSIBLE TITLE. Seller has, and will have at the Closing Date,
Defensible Title to the Oil and Gas Interests. Each Seller represents as to
itself only that it is transferring 100% of its interest in the Transferred
Assets and that by, through and under it, no event has occurred and no
conveyance has been made that would cause such Seller's interest in the
Transferred Assets to be less than the Warranted Interest. Each Seller, as to
itself only, represents and warrants that it owns the Warranted Interest;
provided that the representation and warranty contained in this sentence shall
terminate at Closing. Purchaser's exclusive remedy for any breach of the
warranties set forth in this Section 3.8 shall be the remedy provided in Article
VI.

         3.9 LEASES. With respect to the Leases:

                  (i) the Leases have been maintained according to their terms,
         in compliance with the agreements to which the Leases are subject,
         during the period in which Seller has owned an interest in such Leases;

                  (ii) Seller has made or caused to be made all payments,
         including royalties, delay rentals and shut-in royalties (due in
         respect of the Leases thereunder), during the period in which Seller
         has owned an interest in such Leases and no amounts of such payments
         due during such period are now being held in suspense;

                  (iii) to the Knowledge of Seller, no other Party to any Lease
         is in breach or default with respect to any of its obligations
         thereunder;


                                       8
<PAGE>   10

                  (iv) there has not occurred any event, fact or circumstance
         which with the lapse of time or the giving of notice, or both, would
         constitute such a breach or default on behalf of the Seller or, to the
         Knowledge of Seller, with respect to any other parties; and

                  (v) neither Seller nor, to the Knowledge of Seller, any other
         party to any Lease has given or threatened to give notice of any action
         to terminate, cancel, rescind or procure a judicial reformation of any
         Lease or any provisions thereof.

         3.10 ENVIRONMENTAL MATTERS.

                  (a) To the Knowledge of Seller, since, May 19, 1989, the date
that Seller closed the acquisition of its interest in the Properties,:

                           (i) the use of the Transferred Assets has been
                  limited to the conduct of oil and gas exploration and
                  production operations and related activities;

                           (ii) Seller has not received notice that any
                  Governmental Authority has commenced any investigation or
                  inquiry regarding failure of the Transferred Assets and/or the
                  operations conducted thereon to comply with Environmental Laws
                  or any notice under the Comprehensive Environmental Response,
                  Compensation, and Liability Act, or any state or local laws;

                           (iii) Except for the disposal of salt water produced
                  from the wells located on the Leases using practices
                  consistent with those customarily used by the oil and gas
                  industry operating in the Gulf Coast area, the Transferred
                  Assets have not been used for the generation, storage or
                  disposal of Hazardous Substances or as a landfill or other
                  waste disposal site for Hazardous Substances, in any manner
                  that would constitute a violation of the Environmental Laws by
                  such person; and

                           (iv) Seller has not installed and has not discovered,
                  on the Lands, any underground storage tanks other than the
                  ordinary underground pipeline system used in the conduct of
                  oil and gas operations on the Transferred Assets.

                  (b) To the Knowledge of Seller:

                           (i) the Transferred Assets and the operations
                  conducted thereon are not the subject of any existing,
                  unfulfilled administrative or judicial orders, decrees,
                  judgments, license or permit conditions, or other directives,
                  under any Environmental Law, except as listed on Schedule
                  3.10;

                           (ii) equipment or other personal property or
                  improvements owned or used on the Transferred Assets contain
                  asbestos in such amount, concentration or level that would
                  constitute a violation of Environmental Laws, except as listed
                  on Schedule 3.10;

                           (iii) no equipment or other personal property or
                  improvements owned or used on the Transferred Assets contain
                  any polychlorinated biphenyls in such amount, 


                                       9
<PAGE>   11

                  concentration or level that would constitute a violation of
                  Environmental Laws, except as listed on Schedule 3.10;

                           (iv) no equipment or other personal property or
                  improvements owned or used on the Transferred Assets contain
                  any naturally occurring radioactive material in such amount,
                  concentration or level that would constitute a violation of
                  Environmental Laws, except as listed on Schedule 3.10;

                           (v) except for violations that would not have a
                  Material Adverse Effect on the Transferred Assets or the
                  operations being conducted thereon, such operations conducted
                  thereon are not in violation of, or non-compliance with, any
                  Environmental Laws, nor are they the subject of any activities
                  under the Comprehensive Environmental Response, Compensation,
                  and Liability Act, or analogous state or local laws; and

                           (vi) neither the execution of this Agreement nor the
                  consummation of the transactions contemplated by this
                  Agreement will violate any Environmental Law or require the
                  consent or approval of any agency charged with enforcing any
                  Environmental Law.

                  (c) Notwithstanding any contrary provision in this Agreement
or any document or instrument delivered with respect to this Agreement,

                           (i) Seller makes no representation or warranty with
                  respect to compliance with any Environmental Law of any kind
                  except as provided in this Section 3.10;

                           (ii) All representations and warranties contained in
                  this Section 3.10 are qualified by the knowledge of Seller and
                  Purchaser that the Environmental Protection Agency has not
                  issued permits for the discharge of salt water and other
                  materials from oil and gas exploration and production
                  facilities such as those that are included in the Transferred
                  Assets and that located in the Gulf Coast area, that until
                  recently the Environmental Protection Agency had not provided
                  any written guidance as to the procedures required for
                  application for such permits and that the operator of the
                  Transferred Assets, like other operators of oil and gas
                  exploration and production facilities in the Gulf Coast area,
                  has not been able to obtain such permit; and

                           (iii) All representations and warranties contained in
                  this Section 3.10 shall terminate at the end of the
                  Environmental Indemnity Period, following which the Purchaser
                  agrees not to institute any action or claim for a breach of
                  such representation or warranty; provided, however, that the
                  expiration of the Environmental Indemnity Period shall be
                  extended as to any bona fide claim with respect to the breach
                  of such representation or warranty, solely to the extent that
                  Purchaser asserted such claim according to the procedures
                  provided in Section 10.5 and Section 10.6, if the Purchaser
                  shall have transmitted the Claim Notice with respect to such
                  claim to the Seller prior to the expiration of such
                  Environmental Indemnity Period.

         3.11 OPERATIONS AND EXPENDITURES. With respect to the joint, unit or
other operating agreements affecting the Transferred Assets, there are no
outstanding calls or payments under authorities for expenditures concerning any
single expenditure to be made by Seller in excess of $5,000 that are due 


                                       10
<PAGE>   12


or which Seller has committed to make and that have not been made, except as set
forth on Schedule 3.11 annexed to this Agreement.

         3.12 CONTRACTS. All of the Contracts are set forth on Exhibit "A" to
this Agreement.

         3.13 TAX PARTNERSHIPS. Except as disclosed on Schedule 3.13 annexed to
this Agreement, none of the Transferred Assets are subject to a tax partnership,
except Seller's partnership agreement.

         3.14 FULL DISCLOSURE. No representation or warranty by Seller in this
Article III, in any schedule or exhibit to this Agreement, or in any certificate
or document furnished or to be furnished by Seller on the Closing Date, contains
or will contain any untrue statement of a material fact, or omits or will omit
to state a material fact necessary to make the statements contained therein not
misleading.

                                   ARTICLE IV
                   REPRESENTATIONS AND WARRANTIES OF PURCHASER

         Except as otherwise disclosed in this Agreement, Purchaser hereby
represents and warrants that:

         4.1 ORGANIZATION AND GOOD STANDING. Purchaser is a corporation duly
organized, validly existing and in good standing under the laws of its
jurisdiction of incorporation.

         4.2 CORPORATE AUTHORITY; AUTHORIZATION OF AGREEMENT. Purchaser has all
requisite corporate power and authority to execute and deliver this Agreement,
to consummate the transactions contemplated hereby and to perform all the terms
and conditions hereof to be performed by it. The execution and delivery of this
Agreement by Purchaser, the performance by Purchaser of all the terms and
conditions hereof to be performed by it and the consummation of the transactions
contemplated hereby will have been duly authorized and approved by the Board of
Directors of Purchaser. This Agreement has been duly executed and delivered by
Purchaser and constitutes the valid and binding obligation of Purchaser,
enforceable against it in accordance with its terms, except as such
enforceability may be limited by bankruptcy, insolvency or other laws relating
to or affecting the enforcement of creditors' rights generally and general
principles of equity (regardless of whether such enforceability is considered in
a proceeding in equity or at law).

         4.3 NO VIOLATIONS. This Agreement and the execution and delivery hereof
by Purchaser do not, and the fulfillment and compliance with the terms and
conditions hereof and the consummation of the transactions contemplated hereby
will not:

                           (i) conflict with, or require the consent of any
                  Person under, any of the terms, conditions or provisions of
                  the certificate of incorporation or bylaws of Purchaser;

                           (ii) violate any provision of, or require any filing,
                  consent, authorization or approval under, any Legal
                  Requirement applicable to or binding upon Purchaser (assuming
                  receipt of all routine governmental consents typically
                  received after consummation of transactions of the nature
                  contemplated by this Agreement);


                                       11
<PAGE>   13

                           (iii) conflict with, result in a breach of,
                  constitute a default under (without regard to requirements of
                  notice or the lapse of time or both), accelerate or permit the
                  acceleration of the performance required by, or require any
                  consent, authorization or approval under (a) any mortgage,
                  indenture, loan, credit agreement or other agreement or
                  instrument evidencing indebtedness for borrowed money to which
                  Purchaser is a party or by which Purchaser is bound or to
                  which any of its properties is subject or (b) any lease,
                  license, contract or other agreement or instrument to which
                  Purchaser is a party or by which it is bound or to which any
                  of its properties is subject; or

                           (iv) result in the creation or imposition of any
                  Encumbrance upon the assets of Purchaser;

which violation, breach or encumbrance with respect to the matters specified in
clauses (ii) through (iv) of this Section 4.3 might reasonably be expected to
have a material adverse effect on the business, financial condition or results
of operations of Purchaser, taken as a whole.

         4.4 LITIGATION. There is no action, suit, proceeding or governmental
investigation or inquiry pending, or, to the Knowledge of Purchaser, threatened
against Purchaser or its subsidiaries or any of their respective properties that
might delay, prevent or hinder the consummation of the transactions contemplated
hereby.

                                    ARTICLE V
                       ADDITIONAL AGREEMENTS AND COVENANTS

         5.1 COVENANTS OF SELLER. Seller covenants and agrees with Purchaser as
follows:

         5.1.1 CERTAIN CHANGES. Except as may be expressly permitted by this
Agreement or set forth in any Schedule hereto, from the date hereof until the
Closing, without first obtaining the written consent of Purchaser (which consent
will not be unreasonably withheld), Seller will not:

                           (i) enter into, assign, terminate or amend in any
                  material respect any Contract or Lease;

                           (ii) sell, lease or otherwise dispose of any of the
                  Transferred Assets;

                           (iii) purchase, lease or otherwise acquire any
                  property of any kind whatsoever other than in the ordinary
                  course of business; provided, however, that no such action
                  involving an expenditure of $ 5,000 or more by Seller shall be
                  taken by Seller without Purchaser's prior written consent;

                           (iv) mortgage, encumber or pledge any of the
                  Transferred Assets;

                           (v) operate the Transferred Assets except diligently
                  and in the usual, regular and ordinary manner, consistent with
                  past practices; or

                           (vi) commit itself to do any of the foregoing.


                                       12
<PAGE>   14


         5.1.2 OPERATION OF PROPERTIES. Except as may be expressly permitted
hereunder or as set forth in any Schedule hereto, from the date hereof until the
Closing without first obtaining the Written consent of Purchaser (which consent
will not be unreasonably withheld), Seller will not:

                           (i) waive any right of material value relating to any
                  of the Transferred Assets;

                           (ii) release or abandon any material part of any of
                  the Transferred Assets;

                           (iii) convey, farm out or otherwise dispose of
                  Transferred Assets with a fair market value exceeding either 
                  $5,000 on an individual basis or $5,000 in the aggregate;

                           (iv) commence or consent to any material operations
                  on any Property that it has not previously committed to and
                  that may be expected to cost Seller in excess of $5,000
                  (except for emergency operations, in which case Seller shall
                  promptly notify Purchaser and from the date of Purchaser's
                  response to such notice Seller shall once again be subject to
                  the limitations contained in this clause (iv));

                           (v) enter into, modify or terminate any Contracts or
                  Lease; or

                           (vi) commit itself to do any of the foregoing;

provided, however, that nothing contained in this Section 5.1.2 or elsewhere in
this Agreement shall limit the rights of Seller to produce, consume and sell
Hydrocarbons from the Properties in the ordinary course of business and to
comply with requirements of the NGA, the NGPA and any rules or regulations
issued thereunder.

         5.1.3 CERTAIN COVENANTS WITH RESPECT TO THE TRANSFERRED ASSETS. Except
as may otherwise be expressly provided herein, Seller will, from the date hereof
to the Closing, unless otherwise consented to in writing by Purchaser (which
consent will not be unreasonably withheld):

                           (i) promptly notify Purchaser of the receipt of any
                  written notice or written claim or written threat of notice or
                  claim of which Seller becomes aware relating to any default or
                  breach under, or of any termination or cancellation or written
                  threat of termination or cancellation of, any of the Leases,
                  Properties or Material Contracts;

                           (ii) promptly notify Purchaser of any loss of or
                  damage to any portion of the Transferred Assets exceeding 
                  $5,000 in amount;

                           (iii) cause to be paid all rentals shut-in royalties,
                  minimum royalties and other payments that are necessary to
                  maintain in force its rights in and to the Properties, and pay
                  timely all costs and expenses incurred by it in connection
                  with the Properties, except such costs and expenses as are
                  being contested in good faith; and

                           (iv) as to the Properties, use its Best Efforts to
                  maintain and operate the Properties in accordance with all
                  applicable Legal Requirements (to the extent consistent with
                  customary practices in the oil and gas industry), in
                  accordance with the Contracts 


                                       13
<PAGE>   15

                  relating thereto, and in substantially the same manner that
                  Seller hereto has operated such properties.

         5.1.4 ACCESS. Seller will afford to Purchaser and its authorized
representatives upon reasonable notice, reasonable access from the date hereof
until the Closing Date, during normal business hours, to its personnel,
financial data properties, books and records which are related to the
Transferred Assets to the extent that such access and disclosure would not
unreasonably interfere with the normal operation of the business of Seller or
violate the terms of any agreement by which Seller is bound or any applicable
Legal Requirement; provided, however, that the confidentiality of any data or
information so acquired shall be maintained by Purchaser and its representatives
in accordance with Section 5.2.4.

         5.1.5 BEST EFFORTS. Seller will use its Best Efforts to obtain the
satisfaction of the conditions to Closing set forth in Section 7.1.

         5.1.6 PUBLIC ANNOUNCEMENTS. Except for communications with its
partners, Seller shall not issue any public announcement or statement with
respect to the transactions contemplated hereby except upon the consent of
Purchaser or upon the advice of counsel that such announcement or statement is
legally required; provided, however, that Seller shall, if practical under the
circumstances, consult with Purchaser prior to issuing any such public
announcement or statement.

         5.1.7 PERMISSIONS. Seller will cooperate with Purchaser and take all
action reasonably necessary (i) to obtain all such permissions, approvals and
consents by Governmental Authorities and others as may be required to consummate
the transactions contemplated in this Agreement and (ii) to obtain the transfer
to Purchaser of any and all operating rights held by Seller.

         5.2 COVENANTS OF PURCHASER. Purchaser covenants and agrees with Seller
as follows:

         5.2.1 BEST EFFORTS. Purchaser will use its Best Efforts to obtain the
satisfaction of the conditions to Closing set forth in Section 7.2.

         5.2.2 PUBLIC ANNOUNCEMENTS. Purchaser shall not issue any public
announcement or statement with respect to the transactions contemplated hereby
except upon the consent of Seller or upon the advice of counsel that such
announcement or statement is legally required; provided, however, that Purchaser
shall, if practical under the circumstances, consult with Seller prior to
issuing any such public announcement or statement.

         5.2.3 CONFIDENTIAL INFORMATION. In the event that this Agreement is
terminated or, if not terminated, until the Closing, the confidentiality of any
data or information received by Purchaser regarding the business and assets of
Seller shall be maintained by Purchaser and its representatives in accordance
with the Confidentiality Agreement that was executed by Purchaser.

         5.2.4 USE OF TRADE NAMES. After the Closing, Purchaser shall not use
any logos, trademarks or trade names belonging to Seller, and will, a soon as
reasonably practicable after the Closing, remove any such trade names from all
signs or labels on the Transferred Assets.


                                       14
<PAGE>   16

                                   ARTICLE VI
                           INSPECTION OF TITLE MATTERS

         6.1      TITLE DEFECTS.

                  (a) Any Encumbrances that individually or in the aggregate
         with other defects could cause the title of Seller in any Property
         described in Exhibit A to be less than Defensible Title shall be a
         title defect ("Title Defect"). Purchaser shall be entitled to the
         remedies set forth in Section 6.3 for any matter that constitutes a
         Title Defect even though Purchaser could but for this provision, after
         Closing obtain indemnification for such matter pursuant to Section
         10.2.

                  (b) Any circumstances or condition that could operate to cause
         (i) the Net Revenue Interest of Seller to increase above that set forth
         on Exhibit A without an increase in the Working Interest of Seller, or
         (ii) the Working Interest of Seller to decrease below that set forth on
         Exhibit A without a decrease in the Net Revenue Interest of Seller,
         shall be a title benefit ("Title Benefit").

         6.2 NOTICE OF TITLE DEFECTS AND TITLE BENEFITS.

                  (a) From time to time during the period from the date of
         execution of this Agreement until seven (7) days prior to the Closing
         Date (the "Title Examination Period"), Purchaser shall have the right
         (but not the obligation) to notify Seller of any Title Defect of which
         Purchaser becomes aware, providing in such notice a reasonably detailed
         description of such Title Defect. If the Closing Date is extended
         beyond the Closing Date stated herein in accordance with the provisions
         hereof, then the Title Examination Period shall be extended for a
         similar and parallel length of time. With respect to each notice of a
         Title Defect given during such period, Seller may, but shall have no
         obligation to, attempt to cure such Title Defect prior to Closing.
         Purchaser's failure to give notice of a Title Defect shall not impair
         Purchaser's rights under any express warranty or indemnification made
         by Seller under this Agreement or the Instruments of Transfer.

                  (b) From time to time during the Title Examination Period,
         Purchaser shall notify Seller of any Title Benefits of which Purchaser
         becomes aware and Seller shall have the right (but not the obligation)
         to notify Purchaser of any Title Benefit of which they become aware.
         The value of any such Title Benefits shall be mutually agreed upon by
         Purchaser and Seller, taking into consideration the allocated value of
         the Property (as set forth on allocation of the Purchase Price) subject
         to the Title Benefit, the portion of the Property subject to the Title
         Benefit, the legal effect of the Title Benefit and the anticipated
         economic effect of the Title Benefit over the life of the Property
         subject to such Title Benefit.

         6.3 REMEDIES FOR TITLE DEFECTS. In the event that any Title Defects is
not cured on or before Closing, Purchaser may. at its own election, (a) waive
such Title Defect, (b) elect to terminate this Agreement pursuant to Section
9.1, or (c) reduce the Purchase Price by an amount mutually agreed upon by
Purchaser and Seller as being the value of such Title Defect, taking into
consideration the allocated value of the Property subject to the Title Defect,
the portion of the Property subject to the Title Defect, the legal effect of the
Title Defect on the Property and the liability of Purchaser relative to the
allocated liabilities related to the Property and/or whether the Title Defect is
applicable to a portion of the Property that is not encumbered by the allocated
liability, and the anticipated economic effect of the Title Defect 


                                       15
<PAGE>   17

over the life of the Property subject to the Title Defect (including the
potential amount of reduction of discounted present net worth of net future cash
flow on account of such Title Defect), subject to offset for the value of Title
Benefits. If the parties are unable to agree as to the amount of any adjustment
under Section 6.3 (c), either party may terminate this Agreement.
Notwithstanding anything to the contrary in this Section 6.3, in no event shall
the reduction in the Purchase Price for all Title Defects affecting any Property
exceed the allocated value of such Property.

         6.4 SELLER'S WARRANTY OF TITLE. The Conveyances shall contain a special
warranty of title whereby Seller binds and obligates itself, its successors and
assigns, to warrant and forever defend unto Purchaser, its successors and
assigns, title to the Properties and other tangible Transferred Assets against
all persons lawfully claiming or to claim the same or any part thereof by,
through or under Seller, but not otherwise, together with full subrogation of
Purchaser, to the extent that Seller is entitled to grant such subrogation, to
all representations and warranties of any predecessors of Seller in title.

                                   ARTICLE VII
                              CONDITIONS TO CLOSING

         7.1 CONDITIONS TO THE OBLIGATIONS OF PURCHASER. The obligations of
Purchaser to proceed with the Closing contemplated hereby are subject to the
satisfaction on or prior to the Closing of all of the following conditions, any
one or more of which may be waived, in whole or in part, in writing by
Purchaser:

         7.1.1 COMPLIANCE. Except as otherwise contemplated or permitted herein,
the representations and warranties made herein by Seller shall be correct at and
as of the Closing as though such representations and warranties were made at and
as of the Closing, and Seller shall have complied with all the covenants and
other agreements hereof required by this Agreement to be performed by it at or
prior to the Closing.

         7.1.2 OFFICER'S CERTIFICATES. Purchaser shall have received
certificates, dated the Closing Date, of an executive officer of Seller
certifying as to the matters specified in Section 7.1.1.

         7.1.3 NO ORDERS. The Closing hereunder shall not violate any order or
decree of any Governmental Authority having competent jurisdiction over the
transactions contemplated by this Agreement; provided, however, that if such
order or decree is a temporary restraining order or other ex parte order or
decree and all other conditions precedent to Closing have been satisfied or
waived, the Closing Date shall be extended to a date five (5) business days
subsequent to the date on which such temporary restraining order or other ex
parte order or decree ceases to be in effect.

         7.1.4 CONSENTS TO ASSIGNMENTS. Seller shall have delivered to Purchaser
satisfactory consents to the assignment of the Leases and Contracts.

         7.1.5 TITLE OPINION. Purchaser shall have received within ten (10)
business days prior to Closing a title opinion in a form reasonably satisfactory
to Purchaser, from Purchaser's special title opinion counsel relating to the
Transferred Assets.

         7.1.6 DAMAGE TO TRANSFERRED ASSETS. Purchaser's obligation to purchase
the Seller's interest in the Transferred Assets is conditioned upon the absence
of any material damage, destruction or loss to,


                                       16
<PAGE>   18

or of, the platform, platform equipment pipelines, tankage or related surface
equipment, included as part of the Transferred Assets that has not been covered
by insurance.

         7.1.7 FRENCH CLOSING. Purchaser's obligation to purchase the Seller's
interest in Transferred Assets is conditioned upon Purchaser's closing on the
purchase of at least seventy-five percent (75%) of the Working Interest in the
Leases pursuant to that certain Asset Purchase Agreement between Purchaser and
Pelham, Inc., et al., dated May 15, 1995.

         7.2 CONDITIONS TO THE OBLIGATIONS OF SELLER. The obligation of Seller
to proceed with the Closing contemplated hereby is subject to the satisfaction
on or prior to the Closing of all of the following conditions, any one or more
of which may be waived, in whole or in part, in writing by Seller:

         7.2.1 COMPLIANCE. Except for such breaches of representations or
warranties by and covenants of Purchaser made herein as would not have a
material adverse effect on the business, financial condition and results of
operations of Purchaser, taken as a whole, the representations and warranties
made herein by Purchaser shall be correct at and as of the Closing as though
such representations and warranties were made at and as of the Closing, and
Purchaser shall have complied with all the covenants and other agreements
required by this Agreement to be performed by it at or prior to the Closing.

         7.2.2 OFFICER'S CERTIFICATE. Seller shall have received a certificate
dated the Closing Date of an executive officer of Purchaser, certifying as to
the matters specified in Section 7.2.1.

         7.2.3 NO ORDERS. The Closing hereunder shall not violate any order or
decree of any Governmental Authority having competent jurisdiction over the
transactions contemplated by this Agreement; provided, however, that if such
order or decree is a temporary restraining order or other ex parte order or
decree and all other conditions precedent to Closing have been satisfied or
waived, the Closing Date shall be extended to a date five (5) business days
subsequent to the date on which the temporary restraining order or such other ex
parte order or decree ceases to be in effect.

         7.2.4 APPROVAL BY PARTNERS. Seller shall have received the affirmative
vote of at least 75% of the Seller's partners to ratify and approve this
agreement and the transactions contemplated hereby.

                                  ARTICLE VIII
                                   TAX MATTERS

         8.1      LIABILITY FOR TAXES.

         8.1.1 SELLER. Seller shall be liable for (i) all Taxes for any taxable
period ending on or before the Effective Time, (ii) any income taxes which are
imposed on the gain recognized by Seller on the sale of the Transferred Assets
pursuant to this Agreement, (iii) the portion that is determined as described in
Section 8.1.4, of any Taxes (other than Taxes described in clause (ii) above)
for any taxable period beginning before and ending after the Effective Time and
that is allocable to the portion of such period occurring on or before the
Effective Time (the "Seller Period") and (iv) any sales, use, transfer or
similar taxes arising from the transactions contemplated in this Agreement.


                                       17
<PAGE>   19

         8.1.2 PURCHASER. Purchaser shall be liable for all Taxes attributable
to the Transferred Assets and arising after the Effective Time.

         8.1.3 INDEMNITY. Seller shall indemnify and hold Purchaser harmless
from any liability for amounts for which Seller is liable pursuant to Section
8.1.1. Purchaser shall indemnify and hold Seller harmless from any liability for
amounts for which Purchaser is liable pursuant to Section 8.1.2. The amount of
any indemnity under this Section 8.1.3 shall include any additional amount
necessary to indemnify the recipient of the indemnity payment against any taxes
imposed, and any attorneys' fees or other litigation costs incurred, in
connection with such indemnity payment.

         8.1.4 AD VALOREM TAXES. Whenever it is necessary for purposes of
Section 8.1.1 to determine the portion of any Taxes for a taxable period
beginning before and ending after the Effective Time, which portion is allocable
to the Seller Period, the determination shall be made for ad valorem Taxes, on a
per diem basis and for other Taxes, on the assumption that the Seller Period
constitutes a separate taxable period and by taking into account the actual
taxable events occurring during such period (except that exemptions, allowances
and deductions for a taxable period beginning before and ending after the
Effective Time that are calculated on an annual or periodic basis, such as the
deduction for depreciation, shall be apportioned to the Seller Period on a per
diem basis).

         8.1.5 REFUNDS. If any Seller or Purchaser or any affiliate of a Seller
or Purchaser receives (whether by payment, credit, offset or otherwise) a refund
in respect of any Taxes for which the other party is liable under Section 8.1.1
or 8.1.2, the party receiving such refund shall, within thirty (30) days after
receipt of such refund, remit it to the party liable for the Taxes with respect
to which the refund was received. The parties shall cooperate with each other in
taking all necessary steps to claim any such refund.

         8.1.6 ADJUSTMENT. For purposes of this Section 8.1, the amount of any
downward adjustment to the Purchase Price pursuant to Section 1.3.1(ii)(b) shall
be treated as a payment by Seller of ad valorem taxes imposed with respect to
the Transferred Assets for 1994.

         8.2 COOPERATION AND EXCHANGE OF INFORMATION. Seller or Purchaser will
provide, or cause to be provided, to the other party copies of all
correspondence received from any taxing authority by such party or any of its
affiliates in connection with the liability for Taxes for any period for which
such other party is or may be liable under Section 8.1.1 or 8.1.2. The parties
will provide each other with such cooperation and information as they may
reasonably request of each other in preparing or filing any return, amended
return or claim for refund, in determining a liability or a right to refund or
in conducting any audit or other proceeding in respect of Taxes imposed on the
parties or their respective affiliates. The parties and their affiliates will
preserve and retain all returns, schedules, work papers and other documents
relating to any such returns, claims, audits or other proceedings until the
expiration of the statutory period of limitations (with regard to waivers and
extensions) of the taxable periods to which such documents relate and until the
final determination of any payments which may be required with respect to such
periods under this Agreement and shall make such documents available to
representatives of the other party upon reasonable notice and at reasonable
times, it being understood that such representatives shall be entitled to make
copies of any such books and records as they shall deem necessary. Seller or
Purchaser further agree to permit representatives of the other party to meet
with employees of such party on a mutually convenient basis in order to enable
such representatives to obtain additional information and explanations of any
documents provided pursuant to this Section 8.2. Seller or Purchaser shall make
available to the representatives of the other party at the then current
administrative 


                                       18
<PAGE>   20

headquarters of such party sufficient work space and facilities to perform the
activities described in the two preceding sentences. Any information obtained
pursuant to this Section 8.2 shall be kept confidential, except as may be
otherwise necessary in connection with the filing of returns or claims for
refund or in conducting any audit or other proceeding. Each party shall provide
the cooperation and information required by this Section 8.2 at its own expense.

         8.3 PAYMENT OF TAXES.

         8.3.1 PAYMENT. All Taxes shall be paid by the party that, on the date
that such Taxes are required to be paid, is legally responsible to pay such
Taxes.

         8.3.2 TIME OF PAYMENT. Except as otherwise provided in this Article
VIII or in Section 1.3, any amount to which a party is entitled under this
Article VIII shall be promptly paid to such party by the party obligated to make
such payment following written notice to the party so obligated that the Taxes
to which such amount relates are due and that provides details supporting the
calculation of such amount.

         8.4 SURVIVAL OF OBLIGATIONS. The obligations of the parties set forth
in this Article VIII shall be unconditional and absolute and shall remain in
effect without limitation as to time.

         8.5 CONFLICT. In the event of a conflict between the provisions of this
Article VIII and any other provisions of this Agreement, the provisions of this
Article VIII shall control.

                                   ARTICLE IX
                                   TERMINATION

         9.1 GROUNDS FOR TERMINATION. This Agreement may be terminated at any
time prior to the Closing:

                           (i) by the mutual written agreement of Seller and
                  Purchaser;

                           (ii) by Seller or Purchaser, if the consummation of
                  the transactions contemplated hereby would violate any
                  nonappealable final order, decree or judgment of any
                  Governmental Authority having competent jurisdiction
                  enjoining, restraining or otherwise preventing the
                  consummation of this Agreement or the transactions
                  contemplated hereby; provided, however, that a party shall not
                  be allowed to exercise any right of termination pursuant to
                  this Section 9.1(ii) if the event giving rise to such right
                  shall be due to the negligent or willful failure of such party
                  to perform or observe in any material respect any of the
                  covenants or agreements set forth herein to be performed or
                  observed by such party;

                           (iii) by Purchaser or Seller if the Closing shall not
                  have occurred prior to 5:00 p.m., December 31, 1995; provided,
                  that the Closing was not delayed as a result of the negligent
                  or willful failure of the terminating party's obligation to
                  perform hereunder;

                           (iv) by Seller or Purchaser if the non-terminating
                  party has breached its representations and warranties,
                  defaulted in the performance of its covenants or not satisfied
                  its conditions to Closing;


                                       19
<PAGE>   21


                           (v) by Purchaser, or by Seller, as provided in
                  Section 6.3; or

                           (vi) by Seller, if there is a breach of any
                  representation or warranty under Section 3.10 and the cost of
                  curing such breach would exceed $500,000 and such breach is
                  not waived by Purchaser.

         9.2 EFFECT OF TERMINATION. The following provisions shall apply in the
event of a termination of this Agreement:

         9.2.1 NO LIABILITY. If this Agreement is terminated as permitted under
Section 9.1 (i), (ii), (iii), (v) or (vi), such termination shall be without
liability of any party to this Agreement or any affiliate, shareholder,
director, officer, employee, agent or representative of such party and Seller
shall return to Purchaser the Initial Payment. In such event, the representation
contained in the second sentence of Section 4.2 shall be of no effect.

         9.2.2 PURCHASER'S LIABILITY. If this Agreement is terminated by Seller,
as permitted under Section 9.1 (iv), Seller shall retain the Initial Payment, as
Seller's sole remedy, and Purchaser shall have no further obligation to Seller
for failure to close the transaction.

         9.2.3 SELLER'S LIABILITY. If this Agreement is terminated by Purchaser,
as permitted under Section 9.1 (iv), Purchaser's sole remedy shall be the right
to seek specific performance of Seller's obligation to sell to Purchaser the
Transferred Assets in complete satisfaction of any other damages, thereby
sustained or incurred by Purchaser.

         9.2.4 SURVIVAL. Notwithstanding the foregoing, the provisions of this
Article IX and Section 5.2.3 shall survive any termination of this Agreement.

                                    ARTICLE X
                     EXTENT AND SURVIVAL OF REPRESENTATIONS
                         AND WARRANTIES; INDEMNIFICATION

         10.1 SCOPE OF REPRESENTATIONS OF SELLER. Except as and to the extent
expressly set forth herein, Seller makes no representations or warranties
whatsoever, and disclaim all liability and responsibility for any
representation, warranty, statement or information made or communicated (orally
or in writing) to Purchaser (including, but not limited to, any opinion,
information or advice that may have been provided to Purchaser by any affiliate,
officer, stockholder, director, employee, agent, consultant or representative of
Seller, any petroleum engineer or engineering firm, Seller's counsel or any
other agent, consultant or representative). Without limiting the generality of
the foregoing, except as and to the extent expressly set forth herein and in the
Instruments of Transfer, Seller makes no representations or warranties as to (i)
the title to any of the properties of Seller, (ii) the amounts of Hydrocarbon
reserves attributable to such properties or (iii) any geological or other
interpretations or economic evaluations. Purchaser acknowledges and affirms that
it has had full access to the records of Seller and the information contained
in, or made available or provided with respect to materials contained in, the
records of Seller, and that Purchaser has made its own independent
investigation, analysis and evaluation of the Transferred Assets, (including its
own estimate and appraisal of the extent and value of Seller's Hydrocarbon
reserves). Notwithstanding the foregoing, to the Knowledge of Seller, the
information contained in the records of Seller and information otherwise made
available or furnished in writing to Purchaser by Seller with respect to the
Transferred Assets does not contain any untrue 


                                       20
<PAGE>   22

statement of a material fact or omit to state any material fact that would make
such information not false or misleading.

         10.2 INDEMNIFICATION OF PURCHASER. Seller agrees (i) to indemnify
Purchaser against, and hold Purchaser harmless from. any loss. damage or expense
(including reasonable attorneys' fees) sustained by Purchaser arising out of or
resulting from any inaccuracy in or breach of any of the representations,
warranties or covenants made by Seller in this Agreement, (ii) to pay, perform,
fulfill and discharge all costs, expenses and liabilities incurred in connection
with the Transferred Assets prior to the Closing Date with respect to the
ownership or operation of the Transferred Assets prior to the Closing Date and
(iii) to indemnify, defend and hold Purchaser harmless from and against any and
all claims, losses, damages, costs, expenses, causes of action and judgments of
any kind or character with respect to all liabilities, including the Retained
Liabilities, arising out of or in connection with the ownership or operation of
the Transferred Assets prior to the Closing Date, including, without limitation,
any interest, penalty and other costs and expenses incurred in connection
therewith or the defense thereof (provided that any loss, damage or expense
sustained by Purchaser arising out of or resulting from any breach or violation
of Section 3.10 shall be governed by Section 10.4); provided, however, that
Purchaser shall not be entitled to assert rights of indemnification under this
Section 10.2 or Section 10.4 unless and until the aggregate of all such losses
exceeds $25,000 (it being understood that such losses shall accumulate until
such time or times as the aggregate of all such losses exceeds $25,000,
whereupon Purchaser shall be entitled to indemnification under this Section 10.2
or Section 10.4 for any such losses); and provided, further, that the maximum
aggregate of all losses for which Purchaser shall be entitled to indemnification
by any Seller, whether under this Section 10.2, Section 10.4 or otherwise, shall
not exceed such Seller's share of the Purchase Price.

         10.3 INDEMNIFICATION OF SELLER. Purchaser agrees (i) to indemnify
Seller against, and hold Seller harmless from, any loss, damage or expense
(including reasonable attorneys' fees) sustained by Seller arising out of or
resulting from any inaccuracy in or breach of any of the representations,
warranties or covenants made by Purchaser in this Agreement, (ii) to pay,
perform, fulfill and discharge all costs, expenses and liabilities incurred from
and after the Closing Date with respect to the ownership or operation of the
Transferred Assets from and after the Closing Date and (iii) to indemnify,
defend and hold Seller harmless from and against any and all claims, losses,
damages, costs, expenses, causes of action and judgments of any kind or
character with respect to all liabilities to third parties arising out of or in
connection with the ownership or operation of the Transferred Assets from and
after the Closing Date, including, without limitation, any interest, penalty and
other costs and expenses incurred in connection therewith or the defense thereof
(provided that any loss, damage or expense sustained by Seller arising out of or
resulting from any breach or violation of Article VIII shall be governed by
those provisions); provided. however, that Seller shall not be entitled to
assert rights of indemnification under this Section 10.3 unless and until the
aggregate of all such losses exceeds $25,000 (it being understood that such
losses shall accumulate until such time or times as the aggregate of all such
losses exceeds $25,000, whereupon Seller shall be entitled to indemnification
under this Section 10.3 for any such losses).

         10.4     ENVIRONMENTAL INDEMNITY.

                  (a) Subject to the financial limitations regarding the
         indemnity of Seller described in Section 10.2, Seller agrees, during
         the Environmental Indemnity Period, to indemnify and save Purchaser
         harmless from and against, and to reimburse Purchaser with respect to,
         any and all claims, demands, losses, damages, liabilities, causes of
         action, judgments, penalties, costs and 


                                       21
<PAGE>   23

         expenses (including, without limitation, reasonable legal fees and
         expenses, clean-up costs and disbursements) accrued or incurred by
         Purchaser at any time and from time to time, during the Environmental
         Indemnity Period by reason of (i) the breach of any representation or
         warranty of Seller as set forth in Section 3.10, (ii) any violation
         with respect to or affecting the Transferred Assets on or before the
         Closing Date of any Environmental Laws in effect on or before the
         Closing Date, (iii) the clean-up of the Transferred Assets required
         under Environmental Laws for any activities prior to the Closing Date,
         (iv) any act, omission, event or circumstance existing or occurring on
         or prior to the Closing Date (including without limitation, the
         presence on the Properties of Hazardous Substances or the presence off
         site of Hazardous Substances generated on the Properties, on or prior
         to the Closing Date) that result from or that are in connection with
         the ownership, construction, occupancy, operation, use and/or
         maintenance of the Properties, regardless of whether the act, omission,
         event or circumstance constituted a violation of any Environmental Laws
         at the time of its existence or occurrence, and (v) any and all claims
         or proceedings (whether brought by private party or Governmental
         Authority) for bodily injury, property damage, abatement or
         remediation, environmental damage or impairment or any other injury or
         damage resulting from or relating to any Hazardous Substances located
         upon the Properties prior to the Closing Date. Seller shall also
         indemnify and hold Purchaser harmless from and against any liability,
         loss, cost or expense, including reasonable attorneys' fees and
         expenses, arising from or relating to the imposition or recording of a
         lien on the Properties in connection with any contamination of the
         Properties or pursuant to any Environmental Laws in the event only that
         such contamination occurred prior to the Closing Date. Seller shall
         also hold harmless, and indemnify Purchaser from any liability incurred
         by Purchaser arising out of regulatory action or third-party, claims
         with respect to contamination of the Properties or offsite locations
         that occurred prior to the Closing Date.

                  (b) Notwithstanding anything contained in this Agreement to
         the contrary, the indemnities in this Section 10.4 shall survive the
         Closing Date only until the end of the Environmental Indemnity Period,
         and shall be limited in scope only to any activities discovered after
         the Closing Date but before the end of the Environmental Indemnity
         Period that occurred before the Closing Date. For all purposes with
         respect to the Transferred Assets, Purchaser agrees that it shall have
         the burden of proof that any alleged activities, violations, events or
         conditions occurred before the Closing Date.

                  (c) Seller shall have the right to control any action for
         which indemnity is required under this Section 10.4 through counsel of
         its choice, subject to Purchaser's consent, which shall not be
         unreasonably withheld or delayed, provided, however, at Purchaser's
         option, Purchaser may participate in such action and appoint its own
         counsel. If Seller does not notify Purchaser in writing of its intent
         to control such action within thirty (30) days (or five (5) days less
         than such lesser time as may be required to respond to such claims)
         after receipt by Seller of written notice of such claims, Purchaser
         shall have the right to undertake the control, conduct or settlement of
         such claims through its own counsel at Seller's expense and may settle
         such matter without Seller's consent at its sole expense. In the event
         any proposed settlement includes non-monetary relief, including
         clean-up, Purchaser may agree to such clean-up and settle such matter
         only with the consent of Seller, which consent shall not be
         unreasonably withheld or delayed; provided, however, if Seller fails to
         respond to such a notification by Purchaser regarding such non-monetary
         relief within ten (10) days after Purchaser's notification to Seller,
         Seller shall be deemed to have consented to such non-monetary relief.


                                       22
<PAGE>   24


                  (d) Purchaser agrees that the rights and remedies provided in
         this Section 10.4 shall be the exclusive rights and remedies available
         to it for any matter within the scope of Section 10.4 and that the
         general indemnification provisions of Section 10.2 and any other rights
         or remedies of Purchaser with respect to the Seller for any matter
         within the scope of Section 10.4, whether provided in this Agreement,
         at law or in equity, shall not be applicable and are hereby waived.
         Nothing in this Section 10.4 or elsewhere in this Agreement shall limit
         or impair any rights or remedies of Purchaser against any third party
         under any Environmental Laws, including, without limitation, any rights
         of contribution or indemnification available hereunder.

                  (e) Any indemnification provided in this Section 10.4 shall
         terminate at the end of the Environmental Indemnity Period, following
         which the Purchaser agrees not to institute any action or claim for
         indemnification or other recovery with respect to the matter within the
         scope of Section 10.4; provided, however, that the expiration of the
         Environmental Indemnity Period shall be extended as to any bona fide
         claim for indemnification within the scope or Section 10.4, solely to
         the extent that Purchaser asserted such claim according to the
         procedures provided in Section 10.5 and Section 10.6, if the Purchaser
         shall have transmitted the Claim Notice with respect to such claim to
         the Seller prior to the expiration of such Environmental Indemnity
         Period.

         10.5 SURVIVAL. The representations and warranties set forth in this
Agreement (other than those set forth in Article VIII) shall survive until the
second anniversary of the Closing Date, following which date none of the parties
may bring any action or present any claim for a breach of such representations
and warranties; provided, however, that there shall be no termination of any
representation or warranty as to which a bona fide claim has been asserted if
the Indemnified Party shall have transmitted the Claim Notice with respect
thereto prior to the anniversary of the Closing Date. The representations and
warranties set forth in 3.8.2 shall remain terminate in accordance with the
terms of Article VIII shall terminate in accordance with the terms of Article
VIII.

         10.6 INDEMNIFICATION PROCEDURES. All claims for indemnification under
this Agreement (other than claims for indemnification under Article VIII) shall
be asserted and resolved as follows:

         10.6.1 NOTICE. An Indemnified Party shall promptly (i) notify an
Indemnifying Party of any Third-Party Claim asserted against the Indemnified
Party and (ii) transmit to the Indemnifying Party a Claim Notice relating to
such Third-Party Claim, a copy of all papers served with respect to such claim
(if any), an estimate of the amount of damages attributable to the Third-Party
Claim and the basis of the Indemnified Party's request for indemnification under
this Agreement. During the Election Period, an Indemnifying Party shall notify
an Indemnified Party (a) whether the Indemnifying Party disputes its potential
liability to the Indemnified Party under this Article X with respect to such
Third-Party Claim and (b) whether an Indemnifying Party desires, at the sole
cost and expense of such Indemnifying Party, to defend the Indemnified Party
against such Third-Party Claim.

         10.6.2 DEFENSE BY INDEMNIFYING PARTY. If an Indemnifying Party notifies
an Indemnified Party within the Election Period that the Indemnifying Party does
not dispute its potential liability to the Indemnified Party under this Article
X and that the Indemnifying Party elects to assume the defense of the
Third-Party Claim, then the Indemnifying Party shall have the right to defend,
at its sole cost and expense, such Third-Party Claim by all appropriate
proceedings, which proceedings shall be prosecuted diligently by the
Indemnifying Party to a final conclusion or settled at the discretion of the
Indemnifying Party in accordance with this Section 10.6.2. The Indemnifying
Party shall have full control of such 



                                       23
<PAGE>   25

defense and proceedings, including any compromise or settlement thereof;
provided, however, that any settlement entailing non-monetary consideration must
be approved, in advance, by the Indemnified Party, which approval shall not be
unreasonably delayed or withheld. The Indemnified Party is hereby authorized, at
the sole cost and expense of the Indemnifying Party (but only if the Indemnified
Party is actually entitled to indemnification hereunder or if the Indemnifying
Party assumes the defense with respect to the Third-Party Claim), to file,
during the Election Period, any motion, answer or other pleadings which the
Indemnified Party shall deem necessary or appropriate to protect its interests
or those of the Indemnifying Party and not prejudicial to the Indemnifying Party
(it being understood and agreed that if an Indemnified Party takes any such
action that is prejudicial and conclusively causes a final adjudication adverse
to the Indemnifying Party, the Indemnifying Party shall be relieved of its
obligations hereunder with respect to such Third-Party Claim). If requested by
the Indemnifying Party, the Indemnified Party agrees, at the sole cost and
expense of the Indemnifying Party, to cooperate with the Indemnifying Party and
its counsel in contesting any Third-Party Claim that the Indemnifying Party
elects to contest, including, without limitation, the making of any related
counterclaim against the person asserting the Third-Party Claim or any
cross-complaint against any person. The Indemnified Party may participate in,
but not control, any defense or settlement of any Third-Party Claim controlled
by the Indemnifying Party pursuant to this Section 10.6, and shall bear its own
costs and expenses with respect to any such participation.

         10.6.3 DEFENSE BY INDEMNIFIED PARTY. If an Indemnifying Party fails to
notify an Indemnified Party within the Election Period that the Indemnifying
Party elects to defend the Indemnified Party pursuant to Section 10.6.2, or if
the Indemnifying Party elects to defend the Indemnified Party pursuant to
Section 10.2 but fails diligently and promptly to prosecute or settle the
Third-Party Claim, then the Indemnified Party shall have the right to defend, at
the sole cost and expense of the Indemnifying Party, the Third-Party Claim by
all appropriate proceedings, which proceedings shall be diligently prosecuted by
the Indemnified Party to a final conclusion or settled. The Indemnified Party
shall have full control of such defense and proceedings; and provided, however,
that without the Indemnifying Party's consent, which consent shall not be
unreasonably delayed or withheld, the Indemnified Party shall not be authorized
by the Indemnifying Party to enter into any compromise or settlement of such
Third Party Claim on any non-monetary basis; and provided further, however, that
if requested by the Indemnified Party, the Indemnifying Party shall, at the sole
cost and expense of the Indemnifying Party, cooperate with the Indemnified Party
and its counsel in contesting any Third-Party Claim that the Indemnified Party
is contesting, or, if appropriate and related to the Third-Party Claim in
question, in making any counterclaim against the person asserting the
Third-Party Claim or any cross-complaint against any person. Notwithstanding the
foregoing, if the Indemnifying Party has delivered a written notice to the
Indemnified Party to the effect that the Indemnifying Party disputes its
potential liability to the Indemnified Party under this Article X and if such
dispute is resolved in favor of the Indemnifying Party by a final, nonappealable
order of a court of competent jurisdiction, the Indemnifying Party shall not be
required to bear the costs and expenses of the Indemnified Party's defense
pursuant to this Section 10.6 or of the Indemnifying Party's participation
therein at the Indemnified Party's request, and the Indemnified Party shall
reimburse the Indemnifying Party in full for all costs and expenses of such
litigation. The Indemnifying Party may participate in, but not control, any
defense or settlement controlled by the Indemnified Party pursuant to this
Section 10.6, and the Indemnifying Party shall bear its own costs and expenses
with respect to any such participation.

         10.6.4 OTHER CLAIMS. In the event any Indemnified Party should have a
claim against any Indemnifying Party hereunder that does not involve a
Third-Party Claim, the Indemnified Party shall transmit to the Indemnifying
Party an Indemnity Notice with respect to such claim. If the Indemnifying 


                                       24
<PAGE>   26

Party does not notify the Indemnified Party in writing within sixty (60) days
from its receipt of the Indemnity Notice that the Indemnifying Party disputes
such claim, the claim specified by the Indemnified Party in the Indemnity Notice
shall be deemed a liability of the Indemnifying Party hereunder. If the
Indemnifying Party has timely disputed such claim, as provided above, such
dispute shall be resolved by binding arbitration.

         10.7 TAX BENEFITS, INSURANCE PROCEEDS AND INDEMNIFICATION PAYMENTS. In
determining the amount of any loss, liability or expense for which an
Indemnified Party is entitled to indemnification under this Article X, the gross
amount thereof will be reduced by any correlative insurance proceeds, if any,
realized or to be realized by such Indemnified Party, and such correlative
insurance benefit shall be net of any insurance premium that becomes due as a
result of such claim.

         10.8 TAX ON INDEMNIFICATION PAYMENTS. After taking into account any
adjustment required by Section 10.6, the amount of each payment by an
Indemnifying Party under Section 10.2 and Section 10.3 shall include any
additional amount necessary to indemnify the Indemnified Party against any taxes
imposed in connection with such payment.

                                   ARTICLE XI
                                     BROKERS

         Seller has retained Reid Investments Inc. to assist and advise it in
connection with the transactions contemplated by this Agreement Seller will be
responsible for any fees payable to Reid. Purchaser and Seller represent to the
other that, except as set forth in the preceding sentence, neither has, directly
or indirectly, employed any broker, finder or intermediary in connection with
such transactions that might be entitled to a fee or commission for which the
other party shall have any obligation or responsibility upon the execution of
this Agreement or the consummation of such transactions.

                                   ARTICLE XII
                                    EXPENSES

         Except as specifically provided herein, all legal and other costs and
expenses in connection with this Agreement and the transactions contemplated
hereby shall be paid by the party that incurred such costs and expenses.

                                  ARTICLE XIII
                             NOTICES; MISCELLANEOUS

         13.1 NOTICES. All notices and other communications given hereunder
shall be in writing and shall be deemed given if delivered personally, including
delivery by a nationally recognized courier service, or mailed by registered or
certified mail, return receipt requested, to the parties at the following
addresses:


                                       25
<PAGE>   27

                           (i) If to Purchaser, to:

                           Goldking Trinity Bay Corp.
                           1221 McKinney
                           Suite 1800
                           Houston, Texas 77010

                           Attention: Leonard C. Tallerine, Jr.

                           With a copy to:

                           Looper, Reed, Mark & McGraw
                           9 East Greenway Plaza
                           Suite 1717
                           Houston, Texas 77046

                           Attention: Mark Licata

                           (ii) If to Seller to:

                           Benton Oil & Gas Combination Partnership 1990-1, L.P.
                           c/o Benton Oil & Gas Company
                           1145 Eugenia Place
                           Carpinteria, California 93013

                           Attention: Clarence Cottman

         13.2 MISCELLANEOUS.

         13.2.1 EXCLUSIVE AGREEMENT. This Agreement supersedes all prior written
or oral agreements between the parties with respect to the transactions
contemplated herein, and is intended as a complete and exclusive statement of
the terms of the agreement between the parties with respect to the transactions
contemplated herein.

         13.2.2 CHOICE OF LAW; CHOICE OF FORUM; AMENDMENTS; HEADINGS. This
Agreement shall be governed by the internal laws of the State of Texas, without
giving effect to principles of conflicts of laws. This Agreement may not be
changed or terminated orally. The headings contained in this Agreement are for
reference purposes only and shall not affect in any way the meaning or
interpretation of this Agreement. Terms such as "herein," "hereby," "hereto" and
"hereof" refer to this Agreement as a whole. The term "include" and derivatives
thereof are used in an illustrative sense and not a limitative sense.

         13.2.3 ASSIGNMENTS AND THIRD PARTIES. No party hereto shall assign this
Agreement or any part hereof without the prior written consent of the other
parties; provided, however, that Purchaser shall be authorized to assign this
Agreement provided that no such assignment shall release Purchaser from any of
its obligations under this Agreement. Except as otherwise provided herein, this
Agreement shall be binding upon and inure to the benefit of the parties hereto
and their respective successors and permitted assigns. Nothing in this Agreement
shall entitle any Person, other than the parties hereto or their respective
permitted successors and assigns, to any claim, cause of action, remedy or right
of any kind.


                                       26
<PAGE>   28

         13.2.4 SUBSEQUENT FILINGS. Effective at the Closing Date, Purchaser
shall file with General Land Office of the state of Texas and with such other
Governmental Authorities such notices or certificates as are necessary to
reflect the sale of the Transferred Assets to Purchaser.

         13.2.5 SEVERABILITY. If any term or other provision of this Agreement
is invalid, illegal or incapable of being enforced by any rule of law or public
policy, all other conditions and provisions of this Agreement shall nevertheless
remain in full force and effect so long as the economic or legal substance of
the transactions contemplated hereby is not affected in any manner materially
adverse to any party. Upon any binding determination that any term or other
provision is invalid, illegal or incapable of being enforced, the parties shall
negotiate in good faith to modify this Agreement so as to effect the original
intent of the parties as closely as possible in an acceptable and legally
enforceable manner, to the end that the transactions contemplated hereby may be
completed to the extent possible.

         13.2.6 COUNTERPARTS. This Agreement may be executed in any number of
counterparts, each of which shall be deemed to be an original and all of which
together shall constitute but one and the same agreement.

         13.2.7 FURTHER ASSURANCES.

                           (i) The parties each agree to deliver or cause to be
                  delivered to the others on the Closing Date, and at such other
                  times thereafter as shall be reasonably requested, any
                  additional instrument that the other may reasonably request
                  for the purpose of carrying out this Agreement

                           (ii) After the Closing, Seller and Purchaser shall,
                  and shall cause their affiliates to, execute, acknowledge and
                  deliver all such further conveyances, transfer orders,
                  division orders, notices, assumptions, releases and
                  acquittances, and such other instruments, and shall take such
                  further actions as may be necessary or appropriate to assure
                  fully to Purchaser, its successors or assigns, all of the
                  Transferred Assets intended to be conveyed to Purchaser by the
                  Instruments of Transfer pursuant to this Agreement, and to
                  assure fully to Seller and its affiliates and its successors
                  and assigns, the assumption of the liabilities and obligations
                  intended to be assumed by Purchaser pursuant to this
                  Agreement.

         13.2.8 PRESERVATION OF BOOKS AND RECORDS. For a period of seven (7)
years (five (5) years with respect to geophysical data related to the
Transferred Assets) after the Closing Date, Purchaser and Seller (if and to the
extent Seller has retained any of the hereinafter described records not
delivered to Purchaser at Closing) shall (i) preserve and retain the corporate,
accounting, legal, auditing and other books and records that relate to the
conduct of Seller's businesses and operations prior to the Closing Date
(including, but not limited to, any documents relating to any governmental or
non-governmental actions, suits, proceedings or investigations arising out of
the conduct of the business and operations of Seller prior to the Closing Date
and including, but not limited to, all financial statements and other data and
information necessary or desirable for Purchaser to comply with their public
reporting requirements) and (ii) make such books and records available at their
then current administrative headquarters to the other party and its officers,
employees, agents and affiliates upon reasonable notice and at reasonable times,
it being understood that such other party shall be entitled to make and retain
copies of any such books and records as it shall deem necessary. Purchaser and
Seller agrees to permit representatives of the other party to meet with its
employees on a mutually convenient basis in order to enable such other party 


                                       27
<PAGE>   29

to obtain additional information and explanations of any materials provided
pursuant to this Section 13.2.8.

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

PURCHASER:                          GOLDKING TRINITY BAY CORP.

                                    By:______________________________________
                                    Name:____________________________________
                                    Title:___________________________________


SELLER:                             BENTON OIL & GAS COMBINATION
                                    PARTNERSHIP 1990-1, L.P.


                                    By:______________________________________
                                    Name:____________________________________
                                    Title:___________________________________




                                       28
<PAGE>   30
                                                                      APPENDIX A

                                   Definitions

         Capitalized terms used in this Agreement shall have the meanings
ascribed to them in this Appendix A unless such terms are defined elsewhere in
this Agreement:

         Agreed Interest Rate: Ten percent (10%) per year.

         Best Efforts: A party's best efforts in accordance with reasonable
commercial practices and without the incurrence of unreasonable expense.

         Claim Notice: A written notice delivered by an Indemnified Party to an
Indemnifying Party pursuant to Section 10.6.1 describing in reasonable detail
the nature of a Third-Party Claim that could give rise to a right of
indemnification under this Agreement.

         Claimed Interest Additions: The Interest Additions claimed by Seller on
the list to be submitted to Purchaser within thirty (30) days after the date of
this Agreement pursuant to Section 6.3.

         Closing: The closing of the transactions contemplated by this 
Agreement.

         Closing Date: The date of the Closing.

         Code: The Internal Revenue Code of 1986, as amended.

         Data Rooms: The data rooms prepared by Seller to provide information to
Persons considering the acquisition of the Transferred Assets.

         Defensible Title: Such title to the Transferred Interests, free and
clear of all Encumbrances other than Permitted Encumbrances, that is deducible
of record and free from reasonable doubt to the end that a prudent person
engaged in the business of the ownership, development and operation of producing
oil and gas properties, with knowledge of all the facts and the legal bearing of
such facts and the commercial effect of such facts on the continued control and
operation of the Transferred Assets, would be willing to accept such title.

         Effective Time: The effective time of the transfer of the Transferred
Assets to Purchaser, which shall be deemed to be 7:00 a.m., Houston, Texas time,
on January 1, 1995.

         Election Period: The 30-day period following receipt by an Indemnifying
Party of a Claim Notice.

         Encumbrance: Any mortgage, lien, security interest, pledge, charge,
encumbrance, claim, limitation, preferential right to purchase, consent to
assignment, irregularity, burden or defect or any other claim that Seller does
not own the Warranted Interest.

         Entity: A corporation, partnership, joint venture, trust or
unincorporated organization or association or other entity.

         Environmental Laws: All federal, state and local laws relating to the
protection of human health and safety or the environment, including but not
limited to the federal Comprehensive Environmental 

                                   Appendix A
                                     Page 1
<PAGE>   31

Response, Compensation, and Liability Act, the Resource Conservation and
Recovery Act, the Safe Drinking Water Act, the Toxic Substances Control Act, the
Clean Water Act, the Coastal Zone Management Act, the Endangered Species Act,
the Oil and the Hazardous Materials Transportation Act, all as amended, and all
analogous state and local laws.

         Environmental Indemnity Period: The period beginning on the Closing
Date and ending two (2) years after the Closing Date.

         Governmental Authority: The United States of America, any state,
commonwealth, territory or possession thereof and any political subdivision of
any of the foregoing, including but not limited to courts, departments,
commissions, boards, bureaus, agencies or other instrumentalities.

         Hazardous Substance: Any substance or material now or hereafter defined
as a "hazardous substance", "hazardous material", "hazardous waste",
"contaminant", or "pollutant" under any environmental laws, including but not
limited to Section 1.01 of the Comprehensive Environmental Response,
Compensation and Liability Act, 4-2 U.S.C.A. 9601.

         Hydrocarbons: Oil, gas, minerals (including but not limited to sulfur)
and other gaseous and liquid hydrocarbons or any combination thereof.

         Indemnified Party: A party claiming indemnification under this
Agreement (other than a claim for indemnification under Section 10.4, Article VI
or Article VIII).

         Indemnifying Party: A party from whom indemnification under this
Agreement (other than indemnification under Section 10.4, Article VI or Article
VIII) is sought.

         Indemnity Notice: A written notice from an Indemnified Party to an
Indemnifying Party with respect to a claim for indemnification under this
Agreement (other than indemnification under Section 10.4, Article VI or Article
VIII) not involving a Third-Party Claim, which notice shall describe in detail
the nature of the claim and set forth an estimate of the amount of damages
attributable to such claim and the basis of the Indemnified Party's request for
such indemnification.

         Initial Payment: The initial payment of the Purchase Price in the
amount of FOURTEEN THOUSAND ONE HUNDRED NINETY-TWO DOLLARS ($14,192), paid by
Purchaser to Seller, on the date this Agreement was executed.

         Knowledge: The actual knowledge of each executive officer of Seller
(assuming such Seller is a corporation, and if not, a Person in a similar
capacity) after reasonable inquiry, or Purchaser, as the case may be.

         Leases: As defined in the Instruments of Transfer.

         Legal Requirement: Any law, statute, ordinance, decree, requirement,
order, judgment, rule or regulation of, including the terms of any license or
permit issued by, any Governmental Authority.

         Material Adverse Effect: Any material adverse effect on or with respect
to the Transferred Assets or on the business, operations, prospects or condition
of the Transferred Assets, taken as a whole.

         Net Revenue Interest: The interest (expressed as a percentage) of
Seller in and to Hydrocarbons produced from or allocated to a Property after
deducting all applicable Production Burdens.

                                   Appendix A
                                     Page 2
<PAGE>   32

         NGA: The Natural Gas Act of 1938.

         NGPA: The Natural Gas Policy Act of 1978.

         Permitted Encumbrances: Any or all of the following:

                  (i) encumbrances that arise under operating agreements to
         secure payment of amounts not yet delinquent and are of a type and
         nature customary in the oil and gas industry;

                  (ii) encumbrances that arise as a result of pooling and
         unitization agreements, and production sales contracts securing the
         payment of amounts not yet delinquent;

                  (iii) consents to assignment by Governmental Authorities (a)
         that are obtained on or prior to the Closing Date or (b) that are
         customarily obtained after the consummation of transactions of the
         nature contemplated by this Agreement;

                  (iv) conventional rights of reassignment obligating Seller to
         reassign its interest in any portion of the Properties to a third party
         in the event it intends to release or abandon such interest prior to
         the expiration of the primary term or other termination of such
         interest;

                  (v) easements, rights-of-way, servitudes, permits, surface
         leases, surface use restrictions and other surface uses and impediments
         on, over or in respect of any of the Properties that are not such as to
         interfere materially with the operation, value or use of any of the
         Properties;

                  (vi) such Title Defects and Environmental Defects as Purchaser
         has expressly waived in writing;

                  (viii) such Title Defects for which Purchaser failed to give
         timely notice according to Section 6.2;

                  (ix) such Environmental Defects (to the extent the Purchaser
         has Knowledge of such Environmental Defect) for which Purchaser failed
         to give timely notice according to Section 6.2 or for which Purchaser
         failed to provide written information as required by Section 6.2;

                  (x) rights reserved to or vested in any municipality or
         governmental, tribal, statutory or public authority to control or
         regulate any of the Properties in any manner, and all applicable laws,
         rules and orders of any municipality or governmental or tribal
         authority;

                  (xi) all production burdens that do not operate to (A) reduce
         the Net Revenue Interest below the Warranted Interest or (B) increase
         the Working Interest above the Warranted Interest;

                  (xii) the preferential purchase rights for which waivers have
         been obtained prior to the Closing Date;

                  (xiii) the terms and conditions of the Contracts, insofar and
         only insofar as the Contracts do not operate to (A) reduce the Net
         Revenue Interest of Seller below that set forth on Exhibit A hereto,
         (B) increase the Working Interest of Seller above that set forth on
         Exhibit A hereto without a proportionate increase in the Net Revenue
         Interest of Seller;

                                   Appendix A
                                     Page 3
<PAGE>   33

                  (xiv) any other Encumbrance affecting any portion of a
         Transferred Asset that individually does not materially adversely
         affect the operation, value or use of any such Transferred Asset; and

                  (xv) solely during the period prior to the Closing, any
         Encumbrance that is released on or before Closing.

         Person: shall mean a corporation, an association, a partnership, an
organization, a business, an individual, a government or political subdivision
thereof, or a governmental agency.

         Production Burdens: All royalty interests, overriding royalty
interests, production payments, net profits interests or other similar interests
that constitute a burden on, are measured by or are payable out of the
production of Hydrocarbons or the proceeds realized from the sale or other
disposition thereof.

         Purchase Price Adjustment Amount: The net adjustment to the Purchase
Price to be made pursuant to Section 1.3.1.

         Purchase Price Adjustment Certificate: A statement of the Purchase
Price Adjustment Amount (specifying whether the Purchase Price is to be
increased or decreased by such amount), which shall be certified by an officer
of Seller.

         Seller's Affiliate: Any person that directly or indirectly, through one
or more intermediaries, controls, is controlled by or is under common control
with, such Seller.

         Subsidiary: shall mean, as to a Person, any other Person (a) more than
50% of the outstanding voting stock of which is held, directly or indirectly, by
such Person, or (b) over which such Person has the power, directly or
indirectly, to designate a majority of the directors thereof (if such other
Person is a corporation) or the individuals exercising similar functions (if
such other Person is unincorporated).

         Third-Party Claim: A third-party claim asserted against an Indemnified
Party that could give rise to a right of indemnification under this Agreement
(other than a right of indemnification under Section 10.4, Article VI or Article
VIII).

         Transferred Assets: As defined in Section 1.1.

         Warranted Interests: those interests whereby a Seller is (i) entitled
to receive not less than the "Net Revenue Interest" set forth on Exhibit A
hereto of all oil, gas and associated liquid and gaseous Hydrocarbons produced,
saved and marketed from the Properties, without reduction, throughout the
productive life of such Properties and (ii) obligated to bear the percentage of
the costs and expenses related to the maintenance, development and operation of
the Properties in an amount not greater than the "Working Interest" set forth on
Exhibit A hereto, without increase, throughout the productive life of such
Properties, except increases that result in a proportionate increase in such
Seller's Net Revenue Interest and increases that results from contribution
requirements with respect to defaulting co-owners.

         Working Interest: The interest (expressed as a percentage) of a Seller
in any Transferred Asset before giving effect to any applicable Production
Burdens and the percentage of all costs and expenses associated with the
exploration, development and operation of such Transferred Asset required to be
borne by such Seller.

                                   Appendix A
                                     Page 4
<PAGE>   34


                                 SCHEDULE 1.2.1

                         INDIVIDUAL INTEREST VALUATIONS

<TABLE>
<CAPTION>
                                              WORKING            NET REVENUE         PURCHASE
SELLER                                        INTEREST           INTEREST            PRICE
<S>                                           <C>                <C>                 <C>          
Benton Oil & Gas Combination                  14.191819%         11.850164%          $1,085,675.00
Partnership 1990-1-L.P.,
a California limited partnership
</TABLE>


<PAGE>   35

                 BILL OF SALE, CONVEYANCE AND PARTIAL ASSIGNMENT

STATE OF TEXAS     )
                   )
COUNTY OF CHAMBERS )

         This Bill of Sale, Conveyance and Partial Assignment is from BENTON OIL
& GAS COMBINATION PARTNERSHIP 1990-1, L.P., a California limited partnership,
whose mailing address is 1145 Eugenia Place, Carpinteria, California
("Grantor"), to GOLDKING TRINITY BAY CORP., a Texas corporation ("Grantee"),
whose mailing address is 1221 McKinney, Suite 1800, Houston, Texas 77002.

                                       I.

         NOW, THEREFORE, for and in consideration of Ten and No/100 Dollars
($10.00) and other good and valuable consideration, the receipt and sufficiency
of which are hereby acknowledged, Grantor has granted, bargained, sold,
transferred, assigned and conveyed, and by these presents does hereby grant,
bargain, sell, transfer, assign and convey unto Grantee, its successors and
assigns, subject to the hereinafter stated exceptions, restrictions, covenants
and conditions, all of Grantor's interest in and to the following described
properties, to-wit:

         (a)      the leasehold estate created by each of the Oil, Gas and
                  Mineral Leases listed and described in Exhibit "A", which is
                  annexed hereto and incorporated herein for all purposes, such
                  leases being hereinafter sometimes referred to as "Subject
                  Leases";

         (b)      All payments out of production, overriding royalty interests,
                  carried interests, reversionary interests, and all other
                  rights and interests incident to, or held and owned by Grantor
                  in connection with the Subject Leases, save and except the
                  overriding royalty excepted and reserved herein below by
                  Grantor;

         (c)      All oil, gas, condensate, casinghead gas and other related
                  hydrocarbon substances produced and saved subsequent to the
                  Effective Date of this conveyance from lands covered and
                  affected by the Subject Leases. (The interest described under
                  subparagraphs (a) and (b) above, and this subparagraph (c) are
                  hereinafter sometimes collectively referred to as "Subject
                  Properties");

         (d)      All personal property and facilities located on lands covered
                  by the Subject Leases or the Subject Interests, or both,
                  incident to or held and used in connection with the Subject
                  Interests, including, but not limited to, all tanks, tank
                  batteries, gas plants, disposal facilities, buildings,
                  structures, platforms, field separators and liquid extractors,
                  treators, dehydrators, compressors, pumps, pumping units,
                  valves, fittings, machinery and parts, engines, boilers,
                  meters, apparatus, implements, tools, appliances, cables,
                  wires, towers, casing, tubing and rods, gathering lines or
                  other pipelines, field gathering systems and any and all other
                  fixtures and equipment of every type and description to the
                  extent that the same are used or held in connection with the
                  ownership or operation of the Subject Interests;


                                       1
<PAGE>   36

         (e)      All oil, natural gas or water source wells, whether producing,
                  operating, shut-in, or temporarily abandoned; all types of
                  injection wells; and all equipment used or held by Grantor in
                  connection with the production of oil, gas, condensate,
                  casinghead gas and other related hydrocarbon substances from
                  or attributable to lands covered by the Subject Leases;

         (f)      All tenements, appurtenances, surface leases, easements,
                  permits, licenses, servitudes, or rights-of-way in any way
                  appertaining, belonging, affixed and used in connection with,
                  or incident to, the ownership and operation of the Subject
                  Interests, including, but not limited to, those tenements,
                  appurtenances, surface leases, easements, permits, licenses,
                  servitudes or rights-of-way listed and described in Exhibit
                  "B", annexed hereto and incorporated herein for all purposes;

         (g)      All leases, options, rights of first refusal, orders,
                  contracts, operating agreements, bottom-hole agreements,
                  farmin/farmout agreements, acreage contribution agreements,
                  unit agreements, processing agreements, maintenance
                  agreements, purchase and sale agreements for gas, oil or other
                  minerals, and other agreements and instruments to the extent
                  that same relate, appertain, belong or are in any way
                  incidental to the ownership of the Subject Interests by
                  Grantor, including, but not limited to, those listed and
                  described in Exhibit "C", annexed hereto and incorporated
                  herein for all purposes;

         (h)      All lease files, land files, well files, abstracts, title
                  opinions, title curative, accounting records, royalty payment
                  records, seismic records and surveys, gravity maps, electric
                  logs, contracts, correspondence, microfiche lists, geological
                  and geophysical maps, pressure date and decline curves,
                  graphical production curves and other geological or
                  geophysical data, records and other documents and records of
                  every kind and description which relate to and are possessed
                  by Grantor in connection with the Subject Interests, to the
                  extent and as provided for or limited by that certain Purchase
                  and Sale Agreement dated effective April 1, 1989 by and
                  between Grantor and Texaco Producing Inc.; and

         (i)      Any and all monies held by any individual, partnership, or
                  corporate entity, whether or not such monies are held in
                  escrow, payable to either Texaco Producing Inc. or Grantor, or
                  both, for oil, gas condensate, casinghead gas or other related
                  hydrocarbon substance produced and saved from or attributable
                  to the Subject Leases and purchased by such individual,
                  partnership or corporate entity subsequent to the Effective
                  Date of this conveyance.

The interests described under subparagraph (a) through (i) hereinabove are
herein sometimes collectively referred to as "Subject Interests".

                                       II.

         This Bill of Sale, Conveyance and Assignment is made by Grantor and
accepted by Grantee subject to the following:


                                       2
<PAGE>   37

         (a)      All the terms, conditions and obligations contained and
                  provided for in the Subject Leases;

         (b)      The terms and conditions of all existing orders, rules,
                  regulations and ordinances of any federal, state or other
                  governmental agency that are applicable or related to the
                  Subject Interests;

         (c)      The terms and conditions of the Purchase and Sale Agreement,
                  dated the same date as this conveyance instrument, by and
                  between Grantor, as a Seller and Grantee as the Purchaser,
                  concerning the Subject Interests; and

         (d)      Grantee accepting the Subject Interest in its "as is, where
                  is" condition; Grantor disclaiming any and all liability
                  arising in connection with any environmental matters,
                  including, without limitation, any presence of naturally
                  occurring radioactive material on the property; and Grantee
                  expressly waiving the provisions of Chapter XVII, Subchapter
                  E, Sections 17.41 through 17.63, inclusive, except Section
                  17.555 which is not waived, of Vernon's Texas Code Annotated,
                  Business and Commerce Code. In addition, there are no
                  warranties or representations, either express or implied, as
                  to the quality or quantity of the hydrocarbon reserves, if
                  any, attributable to the interest conveyed herein or the
                  ability of the property to produce hydrocarbons.

         TO HAVE AND TO HOLD all and singular the Subject Interest, as
hereinabove described, unto Grantee, its successors and assigns, and Grantor,
for itself, its successors and assigns, does hereby WARRANT AND FOREVER DEFEND,
all and singular, title to the Subject Interests, free from all liens, claims,
assessments and encumbrances, other than the existing burdens, unto Grantee,
Grantee's successors and assigns, against every person lawfully claiming or to
claim the same, or any part hereof, BY, THROUGH OR UNDER GRANTOR, BUT NOT
OTHERWISE. The reference herein to the "existing burdens" is for the purpose of
protecting Grantor on Grantor's warranties, and shall not create, nor constitute
a recognition of any rights in third parties. Grantor grants unto Grantee full
power and right of substitution and subrogation in and to all covenants and
warranties by others heretofore given or made in respect of the Subject
Interests.

                                      III.

         The provisions hereof shall inure to the benefit of and be binding upon
the parties hereto, their respective legal representatives, successors and
assigns.

         IN TESTIMONY WHEREOF, this Conveyance is executed on the dates and at
the places indicated in the respective acknowledgments below, but is stipulated
herein to be effective as of 7:00 a.m., C.D.S.T., the 1st day of January, 1995.

GRANTOR:                              BENTON OIL & GAS COMBINATION
                                      PARTNERSHIP 1990-1, L.P.

                                      By:________________________________


                                       3
<PAGE>   38


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


PURCHASER:                            GOLDKING TRINITY BAY CORP.



                                      By:__________________________________
                                      Name:________________________________
                                      Title:_______________________________




                                       4
<PAGE>   39


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

Seller:                                BENTON OIL & GAS COMBINATION
                                       PARTNERSHIP 1990-1, L.P.


                                       By:_____________________________________

                                       Name:___________________________________

                                       Title:__________________________________


                                       5

<PAGE>   40


                               [acknowledgements]


                                       6

<PAGE>   1
                                                                     EXHIBIT 2.3


                            ASSET PURCHASE AGREEMENT


                                     BETWEEN


             BENTON OIL & GAS COMBINATION PARTNERSHIP 1991-1, L.P.,
                        A CALIFORNIA LIMITED PARTNERSHIP


                                     SELLER


                                       AND


                           GOLDKING TRINITY BAY CORP.

                                    PURCHASER


                          FOR THE SELLER'S INTEREST IN
                             THE PROPERTIES KNOWN AS


                              UMBRELLA POINT FIELD


                                   JUNE 30, 1995


<PAGE>   2


                            ASSET PURCHASE AGREEMENT

         This ASSET PURCHASE AGREEMENT (this "Agreement") dated as of June 30,
1995 by and between Goldking Trinity Bay Corp., a Texas corporation,
("Purchaser") and Benton Oil & Gas Combination Partnership 1991-1, L.P., a
California limited partnership ("Seller");

                              W I T N E S S E T H:

         WHEREAS, Seller owns the working interest and net revenue interest set
forth opposite such Seller's name on Schedule 1.2.2;

         WHEREAS, Seller desires to sell to Purchaser the Transferred Assets.
and Purchaser desires to purchase from Seller the Transferred Assets, upon the
terms and subject to the conditions hereinafter set forth; and

         NOW, THEREFORE, in consideration of the premises and of the respective
representations, warranties, covenants, agreements and conditions contained
herein, the parties hereto hereby agree as follows.

                                    ARTICLE I
                                PURCHASE AND SALE

         Unless defined elsewhere in this Agreement, all capitalized terms used
herein shall have the respective meanings given them in Appendix A hereto, which
is incorporated herein by reference and shall be deemed to be a part of this
Agreement for all purposes.

         1.1. CONVEYANCE AND TRANSFER OF TRANSFERRED ASSETS. Seller and
Purchaser hereby agree that, at the Closing, upon the terms and subject to the
conditions of this Agreement, Seller shall convey, transfer and assign to
Purchaser, the Transferred Assets.

                  For purposes of this Agreement, the term "Transferred Assets"
shall mean all of each Seller's right, title and interest in certain oil and gas
properties located in Galveston Bay, including all of each Seller's right, title
and interest in and to the following assets:

                  (a) All of the oil and gas leases, oil, gas and mineral leases
         as described in Exhibit A attached hereto and incorporated herein
         (collectively referred to hereinafter as the "Leases" and individually
         as a "Lease"), and the leasehold estates created thereby, and the fee,
         mineral, royalty and overriding royalty interests, net profits
         interests, payments out of production and other real property interests
         described in Exhibit A, together with each and every kind and character
         of right, title, claim or interest that Seller has in and to the lands
         covered thereby, even though the interests of Seller therein may be
         incorrectly described, stated or limited on Exhibit A (collectively the
         "Properties", or singularly, a "Property"), together with all of each
         Seller's right, title and interest in and to all the property and
         rights incident thereto, including without limitation all of Seller's
         right, title and interest in and to:

                           (i) the rights, privileges, benefits and powers
                  conferred upon the holder of any Property with respect to the
                  use and occupation of the surface of, and the subsurface
                  depths under, the land covered by such Property that may be
                  necessary, convenient or incidental to the possession and
                  enjoyment of such Property;

                           (ii) the rights in any pooled, communitized or
                  unitized acreage included in whole or in part in any Property,
                  including all production from the unit, pool or communitized
                  area allocated to any such Property, and all interests in any
                  wells within the unit, pool or communitized area allocated to
                  such Property, whether such unit or pool 


<PAGE>   3

                  production comes from wells located within or without the
                  areas covered by a Property; and

                           (iii) all tenements, hereditaments and appurtenances
                  belonging to such Properties;

                  (b) All of each Seller's right, title and interest in and to
         the rights-of-way, easements. servitudes, permits, licenses,
         franchises, certificates of public convenience and necessity and
         similar rights and privileges, and other rights and interests in land
         primarily owned or used in connection with the Properties;

                  (c) All of each Seller's right, title and interest in and to
         all real, personal and mixed property and fixtures located at the
         Closing on the Properties or the aforesaid rights-of-way, easements and
         other related properties, or primarily used or held for use in
         connection with the ownership, management, development, exploration or
         operation of the Transferred Assets, including without limitation all
         of each Seller's right, title and interest in and to all wells, well
         equipment, platforms, pipes, valves, boilers, compressors, separators,
         heaters, dehydrators, gauges, meters and other measuring equipment,
         regulators, extractors, communication equipment, gas gathering systems,
         casing, tubing, pipelines, power lines, fuel lines, generators, pumps,
         motors, buildings, storage tanks and facilities, improvements,
         fittings, machinery, equipment (including, without limitation, personal
         computers and related peripheral equipment located in the field and
         software that is legally transferable without cost), supplies, spare
         parts, materials and inventories, other than inventories of
         Hydrocarbons in storage tanks or other facilities above the pipeline
         connection to each such storage tank or facility, and in gas pipelines
         downstream from the delivery point sales meters on such pipelines
         existing as of the Effective Time;

                  (d) All of each Seller's right, title and interest in and to
         all contracts, agreements, leases, and/or other arrangements, presently
         owned or acquired as a result of any agreement in existence prior to
         the Closing, including all causes of action pursuant thereto, to the
         extent used in connection with the ownership, management, development,
         exploration or operation of the Transferred Assets, including without
         limitation, all gas purchase and sale agreements, crude purchase and
         sale agreements, natural gas liquids purchase and sale agreements,
         farmin or farmout agreements, exchange agreements, bottom hole
         agreements, dry hole agreements, acreage contribution agreements,
         support agreements, seismic agreements, exploration agreements, joint
         venture agreements, operating agreements, unit agreements, pooling and
         communitization agreements, orders or declarations, balancing
         agreements, gas and natural gas liquids processing agreements,
         gathering and transportation agreements, construction and operation
         agreements, options, liens, security, interests, vendor financing
         agreements, surface leases, subleases and leases of equipment or
         facilities to the extent used or primarily useful in connection with
         the ownership, management, development, exploration or operation of the
         Transferred Assets and reasonably separable from Seller's other
         material rights in the contracts not used in connection with the
         Transferred Assets; provided, however, that no insurance contract or
         other insurance arrangement shall be included in the Transferred Assets
         (collectively, the "Contracts");

                  (e) All of each Seller's right, title and interest in and to
         all Hydrocarbons produced from or attributable to, the Properties and
         proceeds attributable thereto, at and after the Effective Time (subject
         to the provision of Section 1.3); provided, however, that all
         Hydrocarbons in storage tanks and other facilities above the pipeline
         connection to each such storage tank or facility, or in gas pipelines
         downstream from the delivery point sale meters on such pipelines at the
         Effective Time, shall remain the property of Seller; and


                                       2
<PAGE>   4


                  (f) All of each Seller's right, title and interest in and to
         all property and rights incident or attributable to the foregoing
         interests, including, without limitation all of each Seller's right.
         title and interest in and to:

                           (i) subject to the limitations of Section 13.2.8,
                  originals (or, to the extent that originals are not available,
                  copies) of all books, records, files, contracts, muniments of
                  title, reports, surveys and similar documents or materials,
                  including computer tapes, disks and data with respect to any
                  of the foregoing records, that relate to the foregoing
                  interests, including without limitation, the purchase,
                  exchange, operation, administration, sale or marketing
                  thereof, or that constitute evidence of ownership thereof, to
                  the extent such records are reasonably separable from Seller's
                  corporate records, and excluding work product of Seller's
                  legal counsel (other than title opinions) and documents
                  relating to the negotiation and consummation of the
                  transactions contemplated by this Agreement (collectively, the
                  "Records");

                           (ii) (A) the proprietary geological, geophysical and
                  seismic data, materials and information (the "Proprietary
                  Data"), (B) the non-proprietary geological, geophysical and
                  seismic data, materials and information the transfer of which
                  is not prohibited by any copyright or validly existing third
                  party agreement, that is transferable to Purchaser without
                  payment of a transfer fee or other consideration, (C) the
                  maps, interpretations, records and other technical information
                  related to or based upon the Proprietary Data and not related
                  to or based upon the Non-Proprietary Data (the "Proprietary
                  Information") and (D) the maps, interpretations, records and
                  other technical information related to or based upon any
                  combination of the Proprietary Data and the Non-Proprietary
                  Data (the "Combined Information" and collectively, the
                  "Evaluation Data"); and

                           (iii) all division orders, purchase orders, invoices,
                  storage or warehouse receipts, bills of lading and
                  certificates of title to the extent the same are attributable
                  or relate to any of the Transferred Assets, and all documents,
                  instruments, general intangibles and chattel paper primarily
                  related to any of the Transferred Assets (other than the
                  bonds, letters of credit and guarantees posted with
                  governmental agencies, which are expressly reserved by Seller)
                  and all estimated prepayments of royalty obligations of Seller
                  with any federal or state authorities that are directly
                  related to the transferred Assets and that are transferable to
                  Purchaser; provided, however, that the Transferred Assets
                  shall not include (i) any rights and causes of action by
                  Seller to receive amounts (or rights to production from the
                  Properties prior to the Effective Time) pursuant to the
                  Retained Liabilities and (ii) rights and causes of action with
                  respect to the Lawsuits and the facts and circumstances giving
                  rise to such Lawsuits as retained by Seller and more
                  particularly described in Section 1.4.

         1.2. PURCHASE PRICE AND PURCHASE PRICE ALLOCATION.

         1.2.1. PURCHASE PRICE. The aggregate purchase price (the "Purchase
Price") for the Transferred Assets shall be TWO HUNDRED SIXTEEN THOUSAND
NINETY-THREE DOLLARS ($216,093) subject to adjustments as set forth in Section
1.3, of which TWO THOUSAND EIGHT HUNDRED TWENTY-FOUR DOLLARS ($2,824) ("Initial
Payment") shall be paid to the Seller in immediately available funds upon
delivery to Purchaser by Seller of counterparts of this Agreement executed by
Seller. At the Closing, the Purchase Price, less the amount of the Initial
Payment (the "Cash at Closing") and as adjusted as provided in the Purchase
Price Adjustment Certificate described in Section 1.3 2, shall be paid to Seller
by wire transfer in federal or otherwise immediately available funds.
Simultaneously therewith, Seller shall execute and deliver, effective as of the
Effective Time, the Instruments of Transfer.


                                       3
<PAGE>   5

         1.2.2. PURCHASE PRICE ALLOCATION. The Purchase Price shall be allocated
among the types and classes of assets constituting the Transferred Assets as set
forth on a schedule to be provided by Purchaser and Seller at Closing.

         1.3. ADJUSTMENTS TO PURCHASE PRICE.

         1.3.1. ADJUSTMENTS. In addition to any adjustments pursuant to Article
VI, the Cash at Closing shall be adjusted as follows:

                  (i) The Cash at Closing shall be increased by the following:

                           (a) An agreed upon amount representing the value of
                  all merchantable oil in storage above the pipeline connection
                  at the Effective Time that is credited to the Properties;

                           (b) Solely to the extent related to the Transferred
                  Assets, the amount of (1) all actual direct operating
                  expenditures, (2) all capital expenditures and (3) all costs
                  and expenses that are incurred by Seller in connection with,
                  or are otherwise allocable to, the operation of the
                  Transferred Assets under the terms of the joint operating
                  agreement during the period of time after the Effective Time;

                           (c) The amount of any Taxes that have been paid by
                  Seller on or prior to the Closing that are attributable to the
                  time after the Effective Time and for which Purchaser is
                  liable pursuant to Article VIII.

                           (ii) The Cash at Closing shall be decreased by the
                  following:

                           (a) The proceeds that are received by, or payable to,
                  Seller or any other person and that are attributable to the
                  operation of the Transferred Assets for the period of time
                  between the Effective Time and the Closing; and

                           (b) Any amount agreed upon by Purchaser and Seller as
                  the value of any Title Defects, less any amount agreed upon by
                  Purchasers and Seller as the value of any Title Benefits.

         1.3.2. CLOSING ESTIMATE. At least three (3) business days prior to the
Closing Date, Seller on behalf of Seller, shall estimate the Purchase Price
Adjustment Amount and deliver to Purchaser a certificate of an officer of Seller
setting forth in reasonable detail the calculation thereof. The Cash at Closing
shall be adjusted as set forth in such certificate. The Purchase Price
Adjustment Certificate shall include a computation of any reduction in the
Purchase Price caused by the failure of one or more Seller's to deliver on the
Closing Date their respective interests in the Transferred Assets.

         1.3.3. PURCHASE PRICE ADJUSTMENT CERTIFICATE. As soon as reasonably
practicable, and in any event within sixty (60) days following the Closing Date,
Seller shall deliver to Purchaser the Purchase Price Adjustment Certificate.
Within thirty (30) days after delivery of the Purchase Price Adjustment
Certificate, Purchaser shall notify Seller on behalf of Seller, whether
Purchaser agrees or disagrees with the determination of the Purchase Price
Adjustment Amount set forth in the Purchase Price Adjustment Certificate. If
Purchaser disagrees with such determination, representatives of Purchaser and
Seller shall meet and endeavor to resolve their differences regarding the
determination of the Purchase Price Adjustment Amount. If the representatives of
Purchaser and Seller are unable to agree upon such determination of the Purchase
Price Adjustment Amount within twenty (20) business days after Purchaser's
receipt of such notification, Seller shall select an independent accounting firm
from a list of three (3) such firms provided by Purchaser, which firm shall
audit the Purchase Price Adjustment Certificate and determine the Purchase Price
Adjustment Amount. The decision of such independent 


                                       4
<PAGE>   6

accounting firm shall be binding on Seller and Purchaser, and the fees and
expenses of such independent accounting firm shall be borne one-half by Seller
and one-half by Purchaser.

         1.3.4. PAYMENT OF PURCHASE PRICE ADJUSTMENT AMOUNT. If the Purchase
Price Adjustment Amount as finally determined pursuant to Section 1.3.3 is a
smaller upward adjustment or a larger downward adjustment than that estimated
pursuant to Section 1.3.2, Seller shall pay to Purchaser the amount of such
excess plus interest thereon at the Agreed Interest Rate from (and including)
the Closing Date to (but excluding) the date of payment. If the Purchase Price
Adjustment Amount as finally determined pursuant to Section 1.3.3 is a larger
upward adjustment or a smaller downward adjustment than that estimated pursuant
to Section 1.3.2, Purchaser shall pay to Seller the amount of such deficiency
plus interest thereon at the Agreed Interest Rate from (and including) the
Closing Date to (but excluding) the date of payment. Any payments contemplated
by this Section 1.3.4 shall be made by wire transfer in federal or other
immediately available funds on or before the fifth business day following the
final determination of the amount thereof.

         1.4. RETAINED RIGHTS AND CLAIMS. Notwithstanding any provision herein
to the contrary, Transferred Assets shall not include any rights or claims of
Seller with respect to the facts and circumstances giving rise to those certain
proceedings collectively referred to as the "Lawsuits" and filed:

         In the Matter of the Libel and Petition of Exxon Corporation. as Owner
         of the M/V "Bobcat," and Williamson Boat Works, as Charterer of the M/V
         "Bobcat," her engines tackle, apparel, etc., in a cause of exoneration
         from or limitation of liability; C.A. No. C-91-203, United States
         District Court for the Southern District of Texas, Corpus Christi
         Division; and

         French Production Incorporated v. Exxon Corporation d/b/a Exxon Company
         USA. Williamson Boat Works and Captain B.J. Shirley; No. 91-040865,
         District Court of Harris County, Texas, 295th Judicial District.

         1.5. LIABILITIES ASSUMED AND RETAINED.

         1.5 1. ASSUMED LIABILITIES. Purchaser shall assume and agree to pay,
perform and discharge in the ordinary course of business, only those
liabilities, debts or obligations of Seller that are set forth below (the
"Assumed Liabilities"):

                  (i) all liabilities and obligations of or relating to the
         Transferred Assets accruing after the Effective Time;

                  (ii) all liabilities and obligations that accrue after the
         Effective Time, pursuant to the Leases that have been properly
         consented to and assigned; and

                  (iii) all liabilities and obligations that accrue after the
         Effective Time, pursuant to the Contracts that have been properly
         consented to and assigned.

         1.5.2. RETAINED LIABILITIES. Except for the Assumed Liabilities,
Purchaser shall not assume and Seller shall retain and agree to pay, perform and
discharge in the ordinary course of business all liabilities, debts or
obligations of any nature that arise out of or result from any occurrence,
transaction or event occurring prior to the Closing Date relating to the
operation, ownership or use of the Transferred Assets, whether accrued,
absolute, contingent or otherwise, whether due or to become due, including
without limitation any such liability of Seller related to the Lawsuits (the
"Retained Liabilities"); provided however, that Retained Liabilities shall not
include any liability accruing after the Effective Time based on the violation
or alleged violation of any statute, ordinance, rule, regulation, order or other
law of any state, federal, county, local or other governmental subdivision, due
to any occurrence, 


                                       5
<PAGE>   7

transaction or event occurring prior to the Effective Time, which occurrence,
transaction or event was not a violation of any laws existing as of the
Effective Time. The Retained Liabilities shall include any liabilities with
respect to the facts and circumstances giving rise to the Lawsuits.

                                   ARTICLE II
                                   THE CLOSING

         2.1. CLOSING. The Closing shall take place at the offices of Purchaser,
in Houston, Texas at 9:00 a.m on December 31, 1995 or such earlier or later date
as provided hereafter.

         2.2. INSTRUMENTS OF TRANSFER. Seller shall execute and deliver at
Closing the Bill of Sale, Conveyance and Assignment, the form of which is
attached as Exhibit "B" and any other instruments of transfer sufficient to
convey to Purchaser the Transferred Assets, including without limitation the
following (the "Instruments of Transfer"):

                  (a) any personal property included in the Transferred Assets;

                  (b) the Leases, assignment of leasehold interests;

                  (c) the Contracts; and

                  (d) the Properties.

                                   ARTICLE III
                    REPRESENTATIONS AND WARRANTIES OF SELLER

         Seller hereby represents, warrants and covenants as follows:

         3.1. ORGANIZATION AND GOOD STANDING. Seller is a partnership duly
organized, validly existing and in good standing under the laws of its
jurisdiction of formation and has all requisite power and authority to own and
lease the properties and assets it owns and leases and to carry on its business
as such business is conducted.

         3.2. SUBSIDIARIES. No Seller has any Subsidiaries that own any of the
Transferred Assets;

         3.3. AUTHORITY; AUTHORIZATION OF AGREEMENT. Seller at closing will have
all requisite power and authority to execute and deliver this Agreement, the
Instruments of Transfer and each of the other agreements and documents
contemplated, to consummate the transactions contemplated hereby and thereby and
to perform all the terms and conditions to be performed by it. The execution and
delivery of this Agreement, the Instruments of Transfer and each of the other
agreements and documents contemplated, the performance of all the terms and
conditions to be performed by Seller and the consummation of the transactions
contemplated hereby and thereby will be duly authorized and approved by the
partners of Seller. This Agreement, the Instruments of Transfer and each of the
other agreements and documents contemplated, have been duly executed and
delivered by each Seller and constitutes the valid and binding obligation of
each Seller, enforceable against such Seller in accordance with its terms,
except as such enforceability may be limited by bankruptcy, insolvency or other
laws relating to or affecting the enforcement of creditors' rights generally and
general principles of equity (regardless of whether such enforceability is
considered in a proceeding in equity or at law).

         3.4. NO VIOLATIONS. Subject to Article VII(7) 2.4., this Agreement, the
Instruments of Transfer and each of the other agreements and documents
contemplated hereby or thereby, and the execution and delivery hereof by Seller
does not, and the fulfillment and compliance with the terms and conditions
hereof and thereof and the consummation of the transactions contemplated hereby
and thereby will not:


                                       6
<PAGE>   8


                  (i) conflict with, or require the consent of any Person under,
         any of the terms, conditions or provisions of the partnership agreement
         of the Seller;

                  (ii) violate any provision of the Code, the NGA or the NGPA,
         or require any filing, consent, authorization or approval under, any
         Legal Requirement applicable to or binding upon Seller, other than the
         consent to the transfer and assignment of Leases by the General Land
         Office of the State of Texas, which consent Seller shall obtain as soon
         as possible following the Closing;

                  (iii) conflict with, result in a breach of, constitute a
         default under (without regard to requirements of notice or the lapse of
         time or both), accelerate or permit the acceleration of the performance
         required by, or require any consent, authorization or approval under,
         (a) any mortgage, indenture, loan, credit agreement or other agreement
         or instrument evidencing indebtedness for borrowed money or any
         Contract to which Seller is a party or by which Seller is bound or to
         which any of its properties are subject or (b) any Lease to which
         Seller is a party or by which it is bound or to which any of its
         properties are subject; or

                  (iv) result in the creation or imposition of any Encumbrance
         upon the Transferred Assets;

which violation, breach or Encumbrance with respect to the matters specified in
clauses (ii) through (iv) of this Section 3.4 have had or would reasonably be
expected to have a Material Adverse Effect.

         3.5. NO DEFAULT. Seller is not in default under, and no condition
exists that with notice or lapse of time or both would constitute a default
under, (i) any mortgage, indenture, loan, credit agreement or other agreement or
instrument evidencing indebtedness for borrowed money or (ii) any Contract or
Lease to which Seller is a party or by which Seller is bound or to which any of
the Transferred Assets is subject.

         3.6. ABSENCE OF CERTAIN CHANGES. Since the Effective Time, there has
not been any material damage, destruction or loss to, or of, the Transferred
Assets, that has not been covered by insurance.

         3.7. TAXES. All returns, statements and reports with respect to Taxes
that are required to be filed by Seller on or before the Closing have been (or
will have been by the Closing) timely filed with the appropriate Governmental
Authorities and all such Taxes shown thereon as due have been (or will have been
by the Closing) paid or deposited.

         3.8. DEFENSIBLE TITLE. Seller has, and will have at the Closing Date,
Defensible Title to the Oil and Gas Interests. Each Seller represents as to
itself only that it is transferring 100% of its interest in the Transferred
Assets and that by, through and under it, no event has occurred and no
conveyance has been made that would cause such Seller's interest in the
Transferred Assets to be less than the Warranted Interest. Each Seller, as to
itself only, represents and warrants that it owns the Warranted Interest;
provided that the representation and warranty contained in this sentence shall
terminate at Closing. Purchaser's exclusive remedy for any breach of the
warranties set forth in this Section 3.8 shall be the remedy provided in Article
VI.

         3.9. LEASES. With respect to the Leases:

                  (i) the Leases have been maintained according to their terms,
         in compliance with the agreements to which the Leases are subject,
         during the period in which Seller has owned an interest in such Leases;

                  (ii) Seller has made or caused to be made all payments,
         including royalties, delay rentals and shut-in royalties (due in
         respect of the Leases thereunder), during the period in which 


                                       7
<PAGE>   9

         Seller has owned an interest in such Leases and no amounts of such
         payments due during such period are now being held in suspense;

                  (iii) to the Knowledge of Seller, no other Party to any Lease
         is in breach or default with respect to any of its obligations
         thereunder;

                  (iv) there has not occurred any event, fact or circumstance
         which with the lapse of time or the giving of notice, or both, would
         constitute such a breach or default on behalf of the Seller or, to the
         Knowledge of Seller, with respect to any other parties; and

                  (v) neither Seller nor, to the Knowledge of Seller, any other
         party to any Lease has given or threatened to give notice of any action
         to terminate, cancel, rescind or procure a judicial reformation of any
         Lease or any provisions thereof.

         3.10. ENVIRONMENTAL MATTERS.

         (a) To the Knowledge of Seller, since, May 19, 1989, the date that
Seller closed the acquisition of its interest in the Properties,:

                  (i) the use of the Transferred Assets has been limited to the
         conduct of oil and gas exploration and production operations and
         related activities;

                  (ii) Seller has not received notice that any Governmental
         Authority has commenced any investigation or inquiry regarding failure
         of the Transferred Assets and/or the operations conducted thereon to
         comply with Environmental Laws or any notice under the Comprehensive
         Environmental Response, Compensation, and Liability Act, or any state
         or local laws;

                  (iii) Except for the disposal of salt water produced from the
         wells located on the Leases using practices consistent with those
         customarily used by the oil and gas industry operating in the Gulf
         Coast area, the Transferred Assets have not been used for the
         generation, storage or disposal of Hazardous Substances or as a
         landfill or other waste disposal site for Hazardous Substances, in any
         manner that would constitute a violation of the Environmental Laws by
         such person; and

                  (iv) Seller has not installed and has not discovered, on the
         Lands, any underground storage tanks other than the ordinary
         underground pipeline systems used in the conduct of oil and gas
         operations on the Transferred Assets.

         (b) To the Knowledge of Seller:

                  (i) the Transferred Assets and the operations conducted
         thereon are not the subject of any existing, unfulfilled administrative
         or judicial orders, decrees, judgments, license or permit conditions,
         or other directives, under any Environmental Law, except as listed on
         Schedule 3.10;

                  (ii) no equipment or other personal property or improvements
         owned or used on the Transferred Assets contain asbestos in such
         amount, concentration or level that would constitute a violation of
         Environmental Laws, except as listed on Schedule 3.10;

                  (iii) no equipment or other personal property or improvements
         owned or used on the Transferred Assets contain any polychlorinated
         biphenyls in such amount, concentration or level that would constitute
         a violation of Environmental Laws, except as listed on Schedule 3.10;


                                       8
<PAGE>   10

                  (iv) no equipment or other personal property or improvements
         owned or used on the Transferred Assets contain any naturally occurring
         radioactive material in such amount, concentration or level that would
         constitute a violation of Environmental Laws, except as listed on
         Schedule 3.10;

                  (v) except for violations that would not have a Material
         Adverse Effect on the Transferred Assets or the operations being
         conducted thereon, such operations conducted thereon are not in
         violation of, or non-compliance with, any Environmental Laws, nor are
         they the subject of any activities under the Comprehensive
         Environmental Response, Compensation, and Liability Act, or analogous
         state or local laws; and

                  (vi) neither the execution of this Agreement nor the
         consummation of the transactions contemplated by this Agreement will
         violate any Environmental Law or require the consent or approval of any
         agency charged with enforcing any Environmental Law.

         (c) Notwithstanding any contrary provision in this Agreement or any
document or instrument delivered with respect to this Agreement,

                  (i) Seller makes no representation or warranty with respect to
         compliance with any Environmental Law of any kind except as provided in
         this Section 3.10;

                  (ii) All representations and warranties contained in this
         Section 3.10 are qualified by the knowledge of Seller and Purchaser
         that the Environmental Protection Agency has not issued permits for the
         discharge of salt water and other materials from oil and gas
         exploration and production facilities such as those that are included
         in the Transferred Assets and that located in the Gulf Coast area, that
         until recently the Environmental Protection Agency had not provided any
         written guidance as to the procedures required for application for such
         permits and that the operator of the Transferred Assets, like other
         operators of oil and gas exploration and production facilities in the
         Gulf Coast area, has not been able to obtain such permit; and

                  (iii) All representations and warranties contained in this
         Section 3.10 shall terminate at the end of the Environmental Indemnity
         Period, following which the Purchaser agrees not to institute any
         action or claim for a breach of such representation or warranty;
         provided, however, that the expiration of the Environmental Indemnity
         Period shall be extended as to any bona fide claim with respect to the
         breach of such representation or warranty, solely to the extent that
         Purchaser asserted such claim according to the procedures provided in
         Section 10.5 and Section 10.6, if the Purchaser shall have transmitted
         the Claim Notice with respect to such claim to the Seller prior to the
         expiration of such Environmental Indemnity Period.

         3.11. OPERATIONS AND EXPENDITURES. With respect to the joint, unit or
other operating agreements affecting the Transferred Assets, there are no
outstanding calls or payments under authorities for expenditures concerning any
single expenditure to be made by Seller in excess of $5,000 that are due or
which Seller has committed to make and that have not been made, except as set
forth on Schedule 3.11 annexed to this Agreement.

         3.12. CONTRACTS. All of the Contracts are set forth on Exhibit "A" to
this Agreement.

         3.13. TAX PARTNERSHIPS. Except as disclosed on Schedule 3.13 annexed to
the Agreement, none of the Transferred Assets are subject to a tax partnership,
except Seller's partnership agreement.

         3.14. FULL DISCLOSURE. No representation or warranty by Seller in this
Article III, in any schedule or exhibit to this Agreement, or in any certificate
or document furnished or to be furnished by Seller on the Closing Date, contains
or will contain any untrue statement of a material fact, or omits or will omit
to state a material fact necessary to make the statements contained therein not
misleading.

                                       9
<PAGE>   11


                                   ARTICLE IV
                   REPRESENTATIONS AND WARRANTIES OF PURCHASER

         Except as otherwise disclosed in this Agreement, Purchaser hereby
represents and warrants that:

         4.1. ORGANIZATION AND GOOD STANDING. Purchaser is a corporation duly
organized, validly existing and in good standing under the laws of its
jurisdiction of incorporation.

         4.2. CORPORATE AUTHORITY; AUTHORIZATION OF AGREEMENT. Purchaser has all
requisite corporate power and authority to execute and deliver this Agreement,
to consummate the transactions contemplated hereby and to perform all the terms
and conditions hereof to be performed by it. The execution and delivery of this
Agreement by Purchaser, the performance by Purchaser of all the terms and
conditions hereof to be performed by it and the consummation of the transactions
contemplated hereby will have been duly authorized and approved by the Board of
Directors of Purchaser. This Agreement has been duly executed and delivered by
Purchaser and constitutes the valid and binding obligation of Purchaser,
enforceable against it in accordance with its terms, except as such
enforceability may be limited by bankruptcy, insolvency or other laws relating
to or affecting the enforcement of creditors' rights generally and general
principles of equity (regardless of whether such enforceability is considered in
a proceeding in equity or at law).

         4.3. NO VIOLATIONS. This Agreement and the execution and delivery
hereof by Purchaser do not, and the fulfillment and compliance with the terms
and conditions hereof and the consummation of the transactions contemplated
hereby will not:

                  (i) conflict with, or require the consent of any Person under,
         any of the terms, conditions or provisions of the certificate of
         incorporation or bylaws of Purchaser;

                  (ii) violate any provision of, or require any filing, consent,
         authorization or approval under, any Legal Requirement applicable to or
         binding upon Purchaser (assuming receipt of all routine governmental
         consents typically received after consummation of transactions of the
         nature contemplated by this Agreement);

                  (iii) conflict with, result in a breach of, constitute a
         default under (without regard to requirements of notice or the lapse of
         time or both), accelerate or permit the acceleration of the performance
         required by, or require any consent, authorization or approval under
         (a) any mortgage, indenture, loan, credit agreement or other agreement
         or instrument evidencing indebtedness for borrowed money to which
         Purchaser is a party or by which Purchaser is bound or to which any of
         its properties is subject or (b) any lease, license, contract or other
         agreement or instrument to which Purchaser is a party or by which it is
         bound or to which any of its properties is subject; or

                  (iv) result in the creation or imposition of any Encumbrance
         upon the assets of Purchaser;

which violation, breach or encumbrance with respect to the matters specified in
clauses (ii) through (iv) of this Section 4.3 might reasonably be expected to
have a material adverse effect on the business, financial condition or results
of operations of Purchaser, taken as a whole.

         4.4. LITIGATION. There is no action, suit, proceeding or governmental
investigation or inquiry pending, or, to the Knowledge of Purchaser, threatened
against Purchaser or its subsidiaries or any of their respective properties that
might delay, prevent or hinder the consummation of the transactions contemplated
hereby.


                                       10
<PAGE>   12

                                    ARTICLE V
                       ADDITIONAL AGREEMENTS AND COVENANTS

         5.1. COVENANTS OF SELLER. Seller covenants and agrees with Purchaser as
follows:

         5.1.1. Certain Changes. Except as may be expressly permitted by this
Agreement or set forth in any Schedule hereto, from the date hereof until the
Closing, without first obtaining the written consent of Purchaser (which consent
will not be unreasonably withheld), Seller will not:

                  (i) enter into, assign, terminate or amend in any material
         respect any Contract or Lease;

                  (ii) sell, lease or otherwise dispose of any of the
         Transferred Assets;

                  (iii) purchase, lease or otherwise acquire any property of any
         kind whatsoever other than in the ordinary course of business;
         provided, however, that no such action involving an expenditure of
         $5,000 or more by Seller shall be taken by Seller without Purchaser's
         prior written consent;

                  (iv) mortgage, encumber or pledge any of the Transferred
         Assets;

                  (v) operate the Transferred Assets except diligently and in
         the usual, regular and ordinary manner, consistent with past practices;
         or

                  (vi)     commit itself to do any of the foregoing.

         5.1.2. OPERATION OF PROPERTIES. Except as may be expressly permitted
hereunder or as set forth in any Schedule hereto, from the date hereof until the
Closing, without first obtaining the written consent of Purchaser (which consent
will not be unreasonably withheld), Seller will not:

                  (i) waive any right of material value relating to any of the
         Transferred Assets;

                  (ii) release or abandon any material part of any of the
         Transferred Assets;

                  (iii) convey, farm out or otherwise dispose of Transferred
         Assets with a fair market value exceeding either $5,000 on an
         individual basis or $5,000 in the aggregate;

                  (iv) commence or consent to any material operations on any
         Property that it has not previously committed to and that may be
         expected to cost Seller in excess of $5,000 (except for emergency
         operations, in which case Seller shall promptly notify Purchaser and
         from the date of Purchaser's response to such notice Seller shall once
         again be subject to the limitations contained in this clause (iv));

                  (v) enter into, modify or terminate any Contracts or Lease; or

                  (vi) commit itself to do any of the foregoing;

provided, however, that nothing contained in this Section 5.1.2 or elsewhere in
this Agreement shall limit the rights of Seller to produce consume and sell
Hydrocarbons from the Properties in the ordinary course of business and to
comply with requirements of the NGA, the NGPA and any rules or regulations
issued thereunder.


                                       11
<PAGE>   13


         5.1.3. CERTAIN COVENANTS WITH RESPECT TO THE TRANSFERRED ASSETS. Except
as may otherwise be expressly provided herein, Seller will, from the date hereof
to the Closing, unless otherwise consented to in writing by Purchaser (which
consent will not be unreasonably withheld):

                  (i) promptly notify Purchaser of the receipt of any written
         notice or written claim or written threat of notice or claim of which
         Seller becomes aware relating to any default or breach under, or of any
         termination or cancellation or written threat of termination or
         cancellation of, any of the Leases, Properties or Material Contracts;

                  (ii) promptly notify Purchaser of any loss of or damage to any
         portion of the Transferred Assets exceeding $5,000 in amount;

                  (iii) cause to be paid all rentals, shut-in royalties, minimum
         royalties and other payments that are necessary to maintain in force
         its rights in and to the Properties, and pay timely all costs and
         expenses incurred by it in connection with the Properties, except such
         costs and expenses as are being contested in good faith; and

                  (iv) as to the Properties, use its Best Efforts to maintain
         and operate the Properties in accordance with all applicable Legal
         Requirements (to the extent consistent with customary practices in the
         oil and gas industry), in accordance with the Contracts relating
         thereto, and in substantially the same manner that Seller hereto has
         operated such properties.

         5.1.4. ACCESS. Seller will afford to Purchaser and its authorized
representatives upon reasonable notice, reasonable access from the date hereof
until the Closing Date, during normal business hours, to its personnel,
financial data properties, books and records which are related to the
Transferred Assets to the extent that such access and disclosure would not
unreasonably interfere with the normal operation of the business of Seller or
violate the terms of any agreement by which Seller is bound or any applicable
Legal Requirement; provided, however, that the confidentiality of any data or
information so acquired shall be maintained by Purchaser and its representatives
in accordance with Section 5.2.4.

         5.1.5. BEST EFFORTS. Seller will use its Best Efforts to obtain the
satisfaction of the conditions to Closing set forth in Section 7.1.

         5.1.6. PUBLIC ANNOUNCEMENTS. Except for communications with its
partners, Seller shall not issue any public announcement or statement with
respect to the transactions contemplated hereby except upon the consent of
Purchaser or upon the advice of counsel that such announcement or statement is
legally required; provided, however, that Seller shall, if practical under the
circumstances, consult with Purchaser prior to issuing any such public
announcement or statement.

         5.1.7. PERMISSIONS. Seller will cooperate with Purchaser and take all
action reasonably necessary (i) to obtain all such permissions approvals and
consents by Governmental Authorities and others as may be required to consummate
the transactions contemplated in this Agreement and (ii) to obtain the transfer
to Purchaser of any and all operating rights held by Seller.

         5.2. COVENANTS OF PURCHASER. Purchaser covenants and agrees with Seller
as follows:

         5.2.1. BEST EFFORTS. Purchaser will use its Best Efforts to obtain the
satisfaction of the conditions to Closing set forth in Section 7.2.

         5.2.2. PUBLIC ANNOUNCEMENTS. Purchaser shall not issue any public
announcement or statement with respect to the transactions contemplated hereby
except upon the consent of Seller or upon the advice of counsel that such
announcement or statement is legally required; provided, however, that Purchaser
shall, if practical under the circumstances, consult with Seller prior to
issuing any such public announcement or statement.


                                       12
<PAGE>   14


         5.2.3. CONFIDENTIAL INFORMATION. In the event that this Agreement is
terminated or, if not terminated, until the Closing, the confidentiality of any
data or information received by Purchaser regarding the business and assets of
Seller shall be maintained by Purchaser and its representatives in accordance
with the Confidentiality Agreement that was executed by Purchaser.

         5.2.4. USE OF TRADE NAMES. After the Closing, Purchaser shall not use
any logos, trademarks or trade names belonging to Seller, and will, a soon as
reasonably practicable after the Closing remove any such trade names from all
signs or labels on the Transferred Assets.

                                   ARTICLE VI
                           INSPECTION OF TITLE MATTERS

         6.1. TITLE DEFECTS.

                  (a) Any Encumbrances that individually or in the aggregate
         with other defects could cause the title of Seller in any Property
         described in Exhibit A to be less than Defensible Title shall be a
         title defect ("Title Defect"). Purchaser shall be entitled to the
         remedies set forth in Section 6.3 for any matter that constitutes a
         Title Defect even though Purchaser could, but for this provision, after
         Closing obtain indemnification for such matter pursuant to Section
         10.2.

                  (b) Any circumstances or condition that could operate to cause
         (i) the Net Revenue Interest of Seller to increase above that set forth
         on Exhibit A without an increase in the Working Interest of Seller, or
         (ii) the Working Interest of Seller to decrease below that set forth on
         Exhibit A without a decrease in the Net Revenue Interest of Seller,
         shall be a title benefit ("Title Benefit").

         6.2. NOTICE OF TITLE DEFECTS AND TITLE BENEFITS.

         (a) From time to time during the period from the date of execution of
this Agreement until seven (7) days prior to the Closing Date (the "Title
Examination Period"), Purchaser shall have the right (but not the obligation) to
notify Seller of any Title Defect of which Purchaser becomes aware, providing in
such notice a reasonably detailed description of such Title Defect. If the
Closing Date is extended beyond the Closing Date stated herein in accordance
with the provisions hereof, then the Title Examination Period shall be extended
for a similar and parallel length of time. With respect to each notice of a
Title Defect given during such period, Seller may, but shall have no obligation
to, attempt to cure such Title Defect prior to Closing. Purchaser's failure to
give notice of a Title Defect shall not impair Purchaser's rights under any
express warranty or indemnification made by Seller under this Agreement or the
Instruments of Transfer.

         (b) From time to time during the Title Examination Period, Purchaser
shall notify Seller of any Title Benefits of which Purchaser becomes aware and
Seller shall have the right (but not the obligation) to notify Purchaser of any
Title Benefit of which they become aware. The value of any such Title Benefits
shall be mutually agreed upon by Purchaser and Seller, taking into consideration
the allocated value of the Property (asset forth on allocation of the Purchase
Price) subject to the Title Benefit, the portion of the Property subject to the
Title Benefit, the legal effect of the Title Benefit and the anticipated
economic effect of the Title Benefit over the life of the Property subject to
such Title Benefit.

         6.3. REMEDIES FOR TITLE DEFECTS. In the event that any Title Defects is
not cured on or before Closing, Purchaser may, at its own election, (a) waive
such Title Defect, (b) elect to terminate this Agreement pursuant to Section
9.1, or (c) reduce the Purchase Price by an amount mutually agreed upon by
Purchaser and Seller as being the value of such Title Defect, taking into
consideration the allocated value of the Property subject to the Title Defect,
the portion of the Property subject to the Title Defect, the legal effect of the
Title Defect on the Property and the liability of Purchaser relative to the
allocated 


                                       13
<PAGE>   15

liabilities related to the Property and/or whether the Title Defect is
applicable to a portion of the Property that is not encumbered by the allocated
liability, and the anticipated economic effect of the Title Defect over the life
of the Property subject to the Title Defect (including the potential amount of
reduction of discounted present net worth of net future cash flow on account of
such Title Defect), subject to offset for the value of Title Benefits. If the
parties are unable to agree as to the amount of any adjustment under Section 6.3
(c), either party may terminate this Agreement. Notwithstanding anything to the
contrary in this Section 6.3, in no event shall the reduction in the Purchase
Price for all Title Defects affecting any Property exceed the allocated value of
such Property.

         6.4. SELLER'S WARRANTY OF TITLE. The Conveyances shall contain a
special warranty of title whereby Seller binds and obligates itself, its
successors and assigns, to warrant and forever defend unto Purchaser, its
successors and assigns, title to the Properties and other tangible Transferred
Assets against all persons lawfully claiming or to claim the same or any part
thereof by, through or under Seller, but not otherwise, together with full
subrogation of Purchaser, to the extent that Seller is entitled to grant such
subrogation, to all representations and warranties of any predecessors of Seller
in title.

                                   ARTICLE VII
                              CONDITIONS TO CLOSING

         7.1. CONDITIONS TO THE OBLIGATIONS OF PURCHASER. The obligations of
Purchaser to proceed with the Closing contemplated hereby are subject to the
satisfaction on or prior to the Closing of all of the following conditions, any
one or more of which may be waived, in whole or in part, in writing by
Purchaser:

         7.1.1. COMPLIANCE. Except as otherwise contemplated or permitted
herein, the representations and warranties made herein by Seller shall be
correct at and as of the Closing as though such representations and warranties
were made at and as of the Closing, and Seller shall have complied with all the
covenants and other agreements hereof required by this Agreement to be performed
by it at or prior to the Closing.

         7.1.2. OFFICER'S CERTIFICATES. Purchaser shall have received
certificates, dated the Closing Date, of an executive officer of Seller
certifying as to the matters specified in Section 7.1.1.

         7.1.3. NO ORDERS. The Closing hereunder shall not violate any order or
decree of any Governmental Authority having competent jurisdiction over the
transactions contemplated by this Agreement; provided, however, that if such
order or decree is a temporary restraining order or other ex parte order or
decree and all other conditions precedent to Closing have been satisfied or
waived, the Closing Date shall be extended to a date five (5) business days
subsequent to the date on which such temporary restraining order or other ex
parte order or decree ceases to be in effect.

         7.1.4. CONSENTS TO ASSIGNMENTS. Seller shall have delivered to
Purchaser satisfactory consents to the assignment of the Leases and Contracts.

         7.1.5. TITLE OPINION. Purchaser shall have received within ten (10)
business days prior to Closing a title opinion, in a form reasonably
satisfactory to Purchaser, from Purchaser's special title opinion counsel
relating to the Transferred Assets.

         7.1.6. DAMAGE TO TRANSFERRED ASSETS. Purchaser's obligation to purchase
the Seller's interest in the Transferred Assets is conditioned upon the absence
of any material damage, destruction or loss to, or of, the platform, platform
equipment, pipelines, tankage or related surface equipment, included as part of
the Transferred Assets, that has not been covered by insurance.

         7.1.7. FRENCH CLOSING. Purchaser's obligation to purchase the Seller's
interest in Transferred Assets is conditioned upon Purchaser's closing on the
purchase of at least seventy-five percent (75%) of 


                                       14
<PAGE>   16

the Working Interest in the Leases pursuant to that certain Asset Purchase
Agreement between Purchaser and Pelharn, Inc., et al., dated May 15, 1995.

         7.2. CONDITIONS TO THE OBLIGATIONS OF SELLER. The obligation of Seller
to proceed with the Closing contemplated hereby is subject to the satisfaction
on or prior to the Closing of all of the following conditions, any one or more
of which may be waived, in whole or in part, in writing by Seller:

         7.2.1. COMPLIANCE. Except for such breaches of representations or
warranties by and covenants of Purchaser made herein as would not have a
material adverse effect on the business, financial condition and results of
operations of Purchaser, taken as a whole, the representations and warranties
made herein by Purchaser shall be correct at and as of the Closing as though
such representations and warranties were made at and as of the Closing, and
Purchaser shall have complied with all the covenants and other agreements
required by this Agreement to be performed by it at or prior to the Closing.

         7.2.2. OFFICER'S CERTIFICATE. Seller shall have received a certificate
dated the Closing Date of an executive officer of Purchaser, certifying as to
the matters specified in Section 7.2.1.

         7.2.3. NO ORDERS. The Closing hereunder shall not violate any order or
decree of any Governmental Authority having competent jurisdiction over the
transactions contemplated by this Agreement; provided, however, that if such
order or decree is a temporary restraining order or other ex parte order or
decree and all other conditions precedent to Closing have been satisfied or
waived, the Closing Date shall be extended to a date five (5) business days
subsequent to the date on which the temporary restraining order or such other ex
parte order or decree ceases to be in effect.

         7.2.4. APPROVAL BY PARTNERS. Seller shall have received the affirmative
vote of at least 75% of the Seller's partners to ratify and approve this
agreement and the transactions contemplated hereby.

                                  ARTICLE VIII
                                   TAX MATTERS

         8.1. LIABILITY FOR TAXES.

         8.1.1. SELLER. Seller shall be liable for (i) all Taxes for any taxable
period ending on or before the Effective Time, (ii) any income taxes which are
imposed on the gain recognized by Seller on the sale of the Transferred Assets
pursuant to this Agreement, (iii) the portion that is determined as described in
Section 8.1.4, of any Taxes (other than Taxes described in clause (ii) above)
for any taxable period beginning before and ending after the Effective Time and
that is allocable to the portion of such period occurring on or before the
Effective Time (the "Seller Period") and (iv) any sales, use, transfer or
similar taxes arising from the transactions contemplated in this Agreement.

         8.1.2. PURCHASER. Purchaser shall be liable for all Taxes attributable
to the Transferred Assets and arising after the Effective Time.

         8.1.3. INDEMNITY. Seller shall indemnify and hold Purchaser harmless
from any liability for amounts for which Seller is liable pursuant to Section
8.1.1. Purchaser shall indemnify and hold Seller harmless from any liability for
amounts for which Purchaser is liable pursuant to Section 8.1.2. The amount of
any indemnity under this Section 8.1.3 shall include any additional amount
necessary to indemnify the recipient of the indemnity payment against any taxes
imposed, and any attorneys' fees or other litigation costs incurred, in
connection with such indemnity payment.

         8.1.4. AD VALOREM TAXES. Whenever it is necessary for purposes of
Section 8.1.1 to determine the portion of any Taxes for a taxable period
beginning before and ending after the Effective Time, which portion is allocable
to the Seller Period, the determination shall be made for ad valorem Taxes, on a
per diem basis and for other Taxes, on the assumption that the Seller Period
constitutes a separate 


                                       15
<PAGE>   17


taxable period and by taking into account the actual taxable events occurring
during such period (except that exemptions, allowances and deductions for a
taxable period beginning before and ending after the Effective Time that are
calculated on an annual or periodic basis, such as the deduction for
depreciation, shall be apportioned to the Seller Period on a per diem basis).

         8.1.5. REFUNDS. If any Seller or Purchaser or any affiliate of a Seller
or Purchaser receives (whether by payment. credit, offset or otherwise) a refund
in respect of any Taxes for which the other party is liable under Section 8.1.1
or 8.1.2, the party receiving such refund shall, within thirty (30) days after
receipt of such refund, remit it to the party liable for the Taxes with respect
to which the refund was received. The parties shall cooperate with each other in
taking all necessary steps to claim any such refund.

         8.1.6. ADJUSTMENT. For purposes of this Section 8.1, the amount of any
downward adjustment to the Purchase Price pursuant to Section 1.3.1(ii)(b) shall
be treated as a payment by Seller of ad valorem taxes imposed with respect to
the Transferred Assets for 1994.

         8.2. COOPERATION AND EXCHANGE OF INFORMATION. Seller or Purchaser will
provide, or cause to be provided, to the other party copies of all
correspondence received from any taxing authority by such party or any of its
affiliates in connection with the liability for Taxes for any period for which
such other party is or may be liable under Section 8.1.1 or 8.1.2. The parties
will provide each other with such cooperation and information as they may
reasonably request of each other in preparing or filing any return amended
return or claim for refund, in determining a liability or a right to refund or
in conducting any audit or other proceeding in respect of Taxes imposed on the
parties or their respective affiliates. The parties and their affiliates will
preserve and retain all returns, schedules, work papers and other documents
relating to any such returns, claims, audits or other proceedings until the
expiration of the statutory period of limitations (with regard to waivers and
extensions) of the taxable periods to which such documents relate and until the
final determination of any payments which may be required with respect to such
periods under this Agreement and shall make such documents available to
representatives of the other party upon reasonable notice and at reasonable
times, it being understood that such representatives shall be entitled to make
copies of any such books and records as they shall deem necessary. Seller or
Purchaser further agree to permit representatives of the other party to meet
with employees of such party on a mutually convenient basis in order to enable
such representatives to obtain additional information and explanations of any
documents provided pursuant to this Section 8.2. Seller or Purchaser shall make
available to the representatives of the other party at the then current
administrative headquarters of such party sufficient work space and facilities
to perform the activities described in the two preceding sentences. Any
information obtained pursuant to this Section 8.2 shall be kept confidential,
except as may be otherwise necessary in connection with the filing of returns or
claims for refund or in conducting any audit or other proceeding. Each party
shall provide the cooperation and information required by this Section 8.2 at
its own expense.

         8.3. PAYMENT OF TAXES.

         8.3.1. PAYMENT. All Taxes shall be paid by the party that, on the date
that such Taxes are required to be paid, is legally responsible to pay such
Taxes.

         8.3.2. TIME OF PAYMENT. Except as otherwise provided in this Article
VIII or in Section 1.3, any amount to which a party is entitled under this
Article VIII shall be promptly paid to such party by the party obligated to make
such payment following written notice to the party so obligated that the Taxes
to which such amount relates are due and that provides details supporting the
calculation of such amount.

         8.4. SURVIVAL OF OBLIGATIONS. The obligations of the parties set forth
in this Article VIII shall be unconditional and absolute and shall remain in
effect without limitation as to time.


                                       16
<PAGE>   18

         8.5. CONFLICT. In the event of a conflict between the provisions of
this Article VIII and any other provisions of this Agreement, the provisions of
this Article VIII shall control.

                                   ARTICLE IX
                                   TERMINATION

         9.1. GROUNDS FOR TERMINATION. This Agreement may be terminated at any
time prior to the Closing:

                  (i) by the mutual written agreement of Seller and Purchaser;

                  (ii) by Seller or Purchaser, if the consummation of the
         transactions contemplated hereby would violate any nonappealable final
         order, decree or judgment of any Governmental Authority having
         competent jurisdiction enjoining, restraining or otherwise preventing
         the consummation of this Agreement or the transactions contemplated
         hereby; provided, however, that a party shall not be allowed to
         exercise any right of termination pursuant to this Section 9.1(ii) if
         the event giving rise to such right shall be due to the negligent or
         willful failure of such party to perform or observe in any material
         respect any of the covenants or agreements set forth herein to be
         performed or observed by such party;

                  (iii) by Purchaser or Seller if the Closing shall not have
         occurred prior to 5:00 p.m., December 31, 1995; provided, that the
         Closing was not delayed as a result of the negligent or willful failure
         of the terminating party's obligation to perform hereunder;

                  (iv) by Seller or Purchaser if the non-terminating party has
         breached its representations and warranties, defaulted in the
         performance of its covenants or not satisfied its conditions to
         Closing;

                  (v) by Purchaser, or by Seller, as provided in Section 6.3; or

                  (vi) by Seller, if there is a breach of any representation or
         warranty under Section 3.10 and the cost of curing such breach would
         exceed $500,000 and such breach is not waived by Purchaser.

         9.2. EFFECT OF TERMINATION. The following provisions shall apply in the
event of a termination of this Agreement:

         9.2.1. NO LIABILITY. If this Agreement is terminated as permitted under
Section 9.1 (i), (ii), (iii), (v) or (vi), such termination shall be without
liability of any party to this Agreement or any affiliate, shareholder,
director, officer, employee, agent or representative of such party and Seller
shall return to Purchaser the Initial Payment. In such event, the representation
contained in the second sentence of Section 4.2 shall be of no effect.

         9.2.2. PURCHASER'S LIABILITY. If this Agreement is terminated by
Seller, as permitted under Section 9.1 (iv), Seller shall retain the Initial
Payment, as Seller's sole remedy, and Purchaser shall have no further obligation
to Seller for failure to close the transaction.

         9.2.3. SELLER'S LIABILITY. If this Agreement is terminated by
Purchaser, as permitted under Section 9.1 (iv), Purchaser's sole remedy shall be
the right to seek specific performance of Seller's obligation to sell to
Purchaser the Transferred Assets in complete satisfaction of any other damages,
thereby sustained or incurred by Purchaser.

         9.2.4. SURVIVAL. Notwithstanding the foregoing, the provisions of this
Article IX and Section 5.2.3 shall survive any termination of this Agreement.


                                       17
<PAGE>   19

                                    ARTICLE X
                     EXTENT AND SURVIVAL OF REPRESENTATIONS
                         AND WARRANTIES; INDEMNIFICATION

         10.1. SCOPE OF REPRESENTATIONS OF SELLER. Except as and to the extent
expressly set forth herein, Seller makes no representations or warranties
whatsoever, and disclaim all liability and responsibility for any
representation, warranty, statement or information made or communicated (orally
or in writing) to Purchaser (including, but not limited to, any opinion,
information or advice that may have been provided to Purchaser by any affiliate,
officer, stockholder, director, employee, agent, consultant or representative of
Seller, any petroleum engineer or engineering firm, Seller's counsel or any
other agent, consultant or representative). Without limiting the generality of
the foregoing, except as and to the extent expressly set forth herein and in the
Instruments of Transfer, Seller makes no representations or warranties as to (i)
the title to any of the properties of Seller, (ii) the amounts of Hydrocarbon
reserves attributable to such properties or (iii) any geological or other
interpretations or economic evaluations. Purchaser acknowledges and affirms that
it has had full access to the records of Seller and the information contained
in, or made available or provided with respect to materials contained in, the
records of Seller, and that Purchaser has made its own independent
investigation, analysis and evaluation of the Transferred Assets, (including its
own estimate and appraisal of the extent and value of Seller's Hydrocarbon
reserves). Notwithstanding the foregoing, to the Knowledge of Seller, the
information contained in the records of Seller and information otherwise made
available or furnished in writing to Purchaser by Seller with respect to the
Transferred Assets does not contain any untrue statement of a material fact or
omit to state any material fact that would make such information not false or
misleading.

         10 2. INDEMNIFICATION OF PURCHASER. Seller agrees (i) to indemnify
Purchaser against, and hold Purchaser harmless from, any loss, damage or expense
(including reasonable attorneys' fees) sustained by Purchaser arising out of or
resulting from any inaccuracy in or breach of any of the representations,
warranties or covenants made by Seller in this Agreement, (ii) to pay, perform,
fulfill and discharge all costs, expenses and liabilities incurred in connection
with the Transferred Assets prior to the Closing Date with respect to the
ownership or operation of the Transferred Assets prior to the Closing Date and
(iii) to indemnify, defend and hold Purchaser harmless from and against any and
all claims, losses, damages, costs, expenses, causes of action and judgments of
any kind or character with respect to all liabilities, including the Retained
Liabilities, arising out of or in connection with the ownership or operation of
the Transferred Assets prior to the Closing Date, including, without limitation,
any interest, penalty and other costs and expenses incurred in connection
therewith or the defense thereof (provided that any loss. damage or expense
sustained by Purchaser arising out of or resulting from any breach or violation
of Section 3.10 shall be governed by Section 10.4); provided, however, that
Purchaser shall not be entitled to assert rights of indemnification under this
Section 10.2 or Section 10.4 unless and until the aggregate of all such losses
exceeds $25,000 (it being understood that such losses shall accumulate until
such time or times as the aggregate of all such losses exceeds $25,000,
whereupon Purchaser shall be entitled to indemnification under this Section 10.2
or Section 10 4 for any such losses); and provided, further, that the maximum
aggregate of all losses for which Purchaser shall be entitled to indemnification
by any Seller, whether under this Section 10 2, Section 10.4 or otherwise, shall
not exceed such Seller's share of the Purchase Price.

         10.3. INDEMNIFICATION OF SELLER. Purchaser agrees (i) to indemnify
Seller against, and hold Seller harmless from, any loss, damage or expense
(including reasonable attorneys' fees) sustained by Seller arising out of or
resulting from any inaccuracy in or breach of any of the representations,
warranties or covenants made by Purchaser in this Agreement, (ii) to pay,
perform, fulfill and discharge all costs, expenses and liabilities incurred from
and after the Closing Date with respect to the ownership or operation of the
Transferred Assets from and after the Closing Date and (iii) to indemnify,
defend and hold Seller harmless from and against any and all claims, losses,
damages, costs, expenses, causes of action and judgments of any kind or
character with respect to all liabilities to third parties arising out of or in
connection with the ownership or operation of the Transferred Assets from and
after the Closing 


                                       18
<PAGE>   20

Date, including, without limitation, any interest, penalty and other costs and
expenses incurred in connection therewith or the defense thereof (provided that
any loss, damage or expense sustained by Seller arising out of or resulting from
any breach or violation of Article VIII shall be governed by those provisions);
provided, however, that Seller shall not be entitled to assert rights of
indemnification under this Section 10.3 unless and until the aggregate of all
such losses exceeds $25,000 (it being understood that such losses shall
accumulate until such time or times as the aggregate of all such losses exceeds
$25,000, whereupon Seller shall be entitled to indemnification under this
Section 10.3 for any such losses).

         10 4. ENVIRONMENTAL INDEMNITY.

         (a) Subject to the financial limitations regarding the indemnity of
Seller described in Section 10.2, Seller agrees, during the Environmental
Indemnity Period, to indemnify and save Purchaser harmless from and against, and
to reimburse Purchaser with respect to, any and all claims, demands, losses,
damages, liabilities, causes of action, judgments, penalties, costs and expenses
(including, without limitation, reasonable legal fees and expenses, clean-up
costs and disbursements) accrued or incurred by Purchaser at any time and from
time to time, during the Environmental Indemnity Period by reason of (i) the
breach of any representation or warranty of Seller as set forth in Section 3.10,
(ii) any violation with respect to or affecting the Transferred Assets on or
before the Closing Date of any Environmental Laws in effect on or before the
Closing Date, (iii) the clean-up of the Transferred Assets required under
Environmental Laws for any activities prior to the Closing Date, (iv) any act,
omission, event or circumstance existing or occurring on or prior to the Closing
Date (including without limitation, the presence on the Properties of Hazardous
Substances or the presence off site of Hazardous Substances generated on the
Properties, on or prior to the Closing Date) that result from or that are in
connection with the ownership, construction, occupancy, operation, use and/or
maintenance of the Properties, regardless of whether the act, omission, event or
circumstance constituted a violation of any Environmental Laws at the time of
its existence or occurrence, and (v) any and all claims or proceedings (whether
brought by private party or Governmental Authority) for bodily injury, property
damage, abatement or remediation, environmental damage or impairment or any
other injury or damage resulting from or relating to any Hazardous Substances
located upon the Properties prior to the Closing Date. Seller shall also
indemnify and hold Purchaser harmless from and against any liability, loss, cost
or expense, including reasonable attorneys' fees and expenses, arising from or
relating to the imposition or recording of a lien on the Properties in
connection with any contamination of the Properties or pursuant to any
Environmental Laws in the event only that such contamination occurred prior to
the Closing Date. Seller shall also hold harmless and indemnify Purchaser from
any liability incurred by Purchaser arising out of regulatory action or
third-party, claims with respect to contamination of the Properties or offsite
locations that occurred prior to the Closing Date.

         (b) Notwithstanding anything contained in this Agreement to the
contrary, the indemnities in this Section 10.4 shall survive the Closing Date
only until the end of the Environmental Indemnity Period, and shall be limited
in scope only to any activities discovered after the Closing Date but before the
end of the Environmental Indemnity Period that occurred before the Closing Date.
For all purposes with respect to the Transferred Assets, Purchaser agrees that
it shall have the burden of proof that any alleged activities, violations,
events or conditions occurred before the Closing Date.

         (c) Seller shall have the right to control any action for which
indemnity is required under this Section 10.4 through counsel of its choice,
subject to Purchaser's consent, which shall not be unreasonably withheld or
delayed, provided, however, at Purchaser's option, Purchaser may participate in
such action and appoint its own counsel. If Seller does not notify Purchaser in
writing of its intent to control such action within thirty (30) days (or five
(5) days less than such lesser time as may be required to respond to such
claims) after receipt by Seller of written notice of such claims, Purchaser
shall have the right to undertake the control, conduct or settlement of such
claims through its own counsel at Seller's expense and may settle such matter
without Seller's consent at its sole expense. In the event any proposed
settlement includes nonmonetary relief, including clean-up, Purchaser may agree
to such 


                                       19
<PAGE>   21

clean-up and settle such matter only with the consent of Seller, which consent
shall not be unreasonably withheld or delayed; provided, however, if Seller
fails to respond to such a notification by Purchaser regarding such non-monetary
relief within ten (10) days after Purchaser's notification to Seller, Seller
shall be deemed to have consented to such non-monetary relief.

         (d) Purchaser agrees that the rights and remedies provided in this
Section 10.4 shall be the exclusive rights and remedies available to it for any
matter within the scope of Section 10.4 and that the general indemnification
provisions of Section 10.2 and any other rights or remedies of Purchaser with
respect to the Seller for any matter within the scope of Section 10.4, whether
provided in this Agreement, at law or in equity, shall not be applicable and are
hereby waived. Nothing in this Section 10.4 or elsewhere in this Agreement shall
limit or impair any rights or remedies of Purchaser against any third party
under any Environmental Laws, including, without limitation, any rights of
contribution or indemnification available hereunder.

         (e) Any indemnification provided in this Section 10.4 shall terminate
at the end of the Environmental Indemnity Period, following which the Purchaser
agrees not to institute any action or claim for indemnification or other
recovery with respect to the matter within the scope of Section 10.4; provided,
however, that the expiration of the Environmental Indemnity Period shall be
extended as to any bona fide claim for indemnification within the scope or
Section 10.4, solely to the extent that Purchaser asserted such claim according
to the procedures provided in Section 10.5 and Section 10.6, if the Purchaser
shall have transmitted the Claim Notice with respect to such claim to the Seller
prior to the expiration of such Environmental Indemnity Period.

         10.5. SURVIVAL. The representations and warranties set forth in this
Agreement (other than those set forth in Article VIII) shall survive until the
second anniversary of the Closing Date, following which date none of the parties
may bring any action or present any claim for a breach of such representations
and warranties; provided, however, that there shall be no termination of any
representation or warranty as to which a bona fide claim has been asserted if
the Indemnified Party shall have transmitted the Claim Notice with respect
thereto prior to the anniversary of the Closing Date. The representations and
warranties set forth in 3.8.2 shall remain terminate in accordance with the
terms of Article VIII shall terminate in accordance with the terms of Article
VIII.

         10.6. INDEMNIFICATION PROCEDURES. All claims for indemnification under
this Agreement (other than claims for indemnification under Article VIII) shall
be asserted and resolved as follows:

         10 6.1. NOTICE. An Indemnified Party shall promptly (i) notify an
Indemnifying Party of any Third-Party Claim asserted against the Indemnified
Party and (ii) transmit to the Indemnifying Party a Claim Notice relating to
such Third-Party Claim, a copy of all papers served with respect to such claim
(if any), an estimate of the amount of damages attributable to the Third-Party
Claim and the basis of the Indemnified Party's request for indemnification under
this Agreement. During the Election Period, an Indemnifying Party shall notify
an Indemnified Party (a) whether the Indemnifying Party disputes its potential
liability to the Indemnified Party under this Article X with respect to such
Third-Party Claim and (b) whether an Indemnifying Party desires, at the sole
cost and expense of such Indemnifying Party, to defend the Indemnified Party
against such Third-Party Claim.

         10.6.2. DEFENSE BY INDEMNIFYING PARTY. If an Indemnifying Party
notifies an Indemnified Party within the Election Period that the Indemnifying
Party does not dispute its potential liability to the Indemnified Party under
this Article X and that the Indemnifying Party elects to assume the defense of
the Third-Party Claim, then the Indemnifying Party shall have the right to
defend, at its sole cost and expense, such Third-Party Claim by all appropriate
proceedings, which proceedings shall be prosecuted diligently by the
Indemnifying Party to a final conclusion or settled at the discretion of the
Indemnifying Party in accordance with this Section 10.6.2. The Indemnifying
Party shall have full control of such defense and proceedings, including any
compromise or settlement thereof; provided, however, that any settlement
entailing non-monetary consideration must be approved, in advance, by the
Indemnified 


                                       20
<PAGE>   22

Party, which approval shall not be unreasonably delayed or withheld. The
Indemnified Party is hereby authorized, at the sole cost and expense of the
Indemnifying Party (but only if the Indemnified Party is actually entitled to
indemnification hereunder or if the Indemnifying Party assumes the defense with
respect to the Third-Party Claim), to file, during the Election Period, any
motion, answer or other pleadings which the Indemnified Party shall deem
necessary or appropriate to protect its interests or those of the Indemnifying
Party and not prejudicial to the Indemnifying Party (it being understood and
agreed that if an Indemnified Party takes any such action that is prejudicial
and conclusively causes a final adjudication adverse to the Indemnifying Party,
the Indemnifying Party shall be relieved of its obligations hereunder with
respect to such Third-Party Claim). If requested by the Indemnifying Party, the
Indemnified Party agrees, at the sole cost and expense of the Indemnifying
Party, to cooperate with the Indemnifying Party and its counsel in contesting
any Third-Party Claim that the Indemnifying Party elects to contest, including,
without limitation, the making of any related counterclaim against the person
asserting the Third-Party Claim or any cross-complaint against any person. The
Indemnified Party may participate in, but not control, any defense or settlement
of any Third-Party Claim controlled by the Indemnifying Party pursuant to this
Section 10.6., and shall bear its own costs and expenses with respect to any
such participation.

         10 6.3. DEFENSE BY INDEMNIFIED PARTY. If an Indemnifying Party fails to
notify an Indemnified Party within the Election Period that the Indemnifying
Party elects to defend the Indemnified Party pursuant to Section 10.6.2, or if
the Indemnifying Party elects to defend the Indemnified Party pursuant to
Section 10..2 but fails diligently and promptly to prosecute or settle the
Third-Party Claim, then the Indemnified Party shall have the right to defend, at
the sole cost and expense of the Indemnifying Party, the Third-Party Claim by
all appropriate proceedings, which proceedings shall be diligently prosecuted by
the Indemnified Party to a final conclusion or settled. The Indemnified Party
shall have full control of such defense and proceedings; and provided, however,
that without the Indemnifying Party's consent, which consent shall not be
unreasonably delayed or withheld, the Indemnified Party shall not be authorized
by the Indemnifying Party to enter into any compromise or settlement of such
Third Party Claim on any non-monetary basis; and provided further, however, that
if requested by the Indemnified Party, the Indemnifying Party shall, at the sole
cost and expense of the Indemnifying Party, cooperate with the Indemnified Party
and its counsel in contesting any Third-Party Claim that the Indemnified Party
is contesting, or, if appropriate and related to the Third-Party Claim in
question, in making any counterclaim against the person asserting the
Third-Party Claim or any cross-complaint against any person. Notwithstanding the
foregoing, if the Indemnifying Party has delivered a written notice to the
Indemnified Party to the effect that the Indemnifying Party disputes its
potential liability to the Indemnified Party under this Article X and if such
dispute is resolved in favor of the Indemnifying Party by a final, nonappealable
order of a court of competent jurisdiction, the Indemnifying Party shall not be
required to bear the costs and expenses of the Indemnified Party's defense
pursuant to this Section 10.6 or of the Indemnifying Party's participation
therein at the Indemnified Party's request, and the Indemnified Party shall
reimburse the Indemnifying Party in full for all costs and expenses of such
litigation. The Indemnifying Party may participate in, but not control, any
defense or settlement controlled by the Indemnified Party pursuant to this
Section 10.6, and the Indemnifying Party shall bear its own costs and expenses
with respect to any such participation.

         10.6.4. OTHER CLAIMS. In the event any Indemnified Party should have a
claim against any Indemnifying Party hereunder that does not involve a
Third-Party Claim, the Indemnified Party shall transmit to the Indemnifying
Party an Indemnity Notice with respect to such claim. If the Indemnifying Party
does not notify the Indemnified Party in writing within Sixty (60) days from its
receipt of the Indemnity Notice that the Indemnifying Party disputes such claim,
the claim specified by the Indemnified Party in the Indemnity Notice shall be
deemed a liability of the Indemnifying Party hereunder. If the Indemnifying
Party has timely disputed such claim, as provided above, such dispute shall be
resolved by binding arbitration.

         10.7. TAX BENEFITS, INSURANCE PROCEEDS AND INDEMNIFICATION PAYMENTS. In
determining the amount of any loss, liability or expense for which an
Indemnified Party is entitled to indemnification 


                                       21
<PAGE>   23

under this Article X, the gross amount thereof will be reduced by any
correlative insurance proceeds, if any, realized or to be realized by such
Indemnified Party, and such correlative insurance benefit shall be net of any
insurance premium that becomes due as a result of such claim.

         10.8. TAX ON INDEMNIFICATION PAYMENTS. After taking into account any
adjustment required by Section 10.6, the amount of each payment by an
Indemnifying Party under Section 10.2 and Section 10.3 shall include any
additional amount necessary to indemnify the Indemnified Party against any taxes
imposed in connection with such payment.

                                   ARTICLE XI
                                     BROKERS

         Seller has retained Reid Investments Inc. to assist and advise it in
connection with the transactions contemplated by this Agreement Seller will be
responsible for any fees payable to Reid. Purchaser and Seller represent to the
other that, except as set forth in the preceding sentence, neither has, directly
or indirectly, employed any broker, finder or intermediary in connection with
such transactions that might be entitled to a fee or commission for which the
other party shall have any obligation or responsibility upon the execution of
this Agreement or the consummation of such transactions.

                                   ARTICLE XII
                                    EXPENSES

         Except as specifically provided herein, all legal and other costs and
expenses in connection with this Agreement and the transactions contemplated
hereby shall be paid by the party that incurred such costs and expenses.

                                  ARTICLE XIII
                             NOTICES; MISCELLANEOUS

         13.1. NOTICES. All notices and other communications given hereunder
shall be in writing and shall be deemed given if delivered personally, including
delivery by a nationally recognized courier service, or mailed by registered or
certified mail, return receipt requested, to the parties at the following
addresses:

                           (i)      If to Purchaser, to:

                                        Goldking Trinity Bay Corp.
                                        1221 McKinney
                                        Suite 1800
                                        Houston, Texas 77010

                                    Attention: Leonard C. Tallerine, Jr.

                                    With a copy to:

                                        Looper, Reed, Mark & McGraw
                                        9 East Greenway Plaza
                                        Suite 1717
                                        Houston, Texas 77046

                                        Attention: Mark Licata

                                       22
<PAGE>   24



                           (ii)     If to Seller to:

                                        Benton Oil & Gas Combination 
                                          Partnership 1991-1, L.P.
                                        c/o Benton Oil & Gas Company
                                        1145 Eugenia Place
                                        Carpinteria, Califomia 93013

                                        Attention: Clarence Cottman

         13.2. MISCELLANEOUS.

         13.2.1. EXCLUSIVE AGREEMENT. This Agreement supersedes all prior
written or oral agreements between the parties with respect to the transactions
contemplated herein, and is intended as a complete and exclusive statement of
the terms of the agreement between the parties with respect to the transactions
contemplated herein.

         13.2.2. CHOICE OF LAW; CHOICE OF FORUM; AMENDMENTS; HEADINGS. This
Agreement shall be governed by the internal laws of the State of Texas, without
giving effect to principles of conflicts of laws. This Agreement may not be
changed or terminated orally. The headings contained in this Agreement are for
reference purposes only and shall not affect in any way the meaning or
interpretation of this Agreement. Terms such as "herein," "hereby," "hereto" and
"hereof" refer to this Agreement as a whole. The term "include" and derivatives
thereof are used in an illustrative sense and not a limitative sense.

         13.2.3. ASSIGNMENTS AND THIRD PARTIES. No party hereto shall assign
this Agreement or any part hereof without the prior written consent of the other
parties; provided, however, that Purchaser shall be authorized to assign this
Agreement provided that no such assignment shall release Purchaser from any of
its obligations under this Agreement. Except as otherwise provided herein, this
Agreement shall be binding upon and inure to the benefit of the parties hereto
and their respective successors and permitted assigns. Nothing in this Agreement
shall entitle any Person, other than the parties hereto or their respective
permitted successors and assigns, to any claim, cause of action, remedy or right
of any kind.

         13.2.4. SUBSEQUENT FILINGS. Effective at the Closing Date, Purchaser
shall file with General Land Office of the state of Texas and with such other
Governmental Authorities such notices or certificates as are necessary to
reflect the sale of the Transferred Assets to Purchaser.

         13.2.5. SEVERABILITY. If any term or other provision of this Agreement
is invalid, illegal or incapable of being enforced by any rule of law or public
policy, all other conditions and provisions of this Agreement shall nevertheless
remain in full force and effect so long as the economic or legal substance of
the transactions contemplated hereby is not affected in any manner materially
adverse to any party. Upon any binding determination that any term or other
provision is invalid, illegal or incapable of being enforced, the parties shall
negotiate in good faith to modify this Agreement so as to effect the original
intent of the parties as closely as possible in an acceptable and legally
enforceable manner, to the end that the transactions contemplated hereby may be
completed to the extent possible.

         13.2.6. COUNTERPARTS. This Agreement may be executed in any number of
counterparts, each of which shall be deemed to be an original and all of which
together shall constitute but one and the same agreement.


                                       23
<PAGE>   25

         13.2.7. FURTHER ASSURANCES.

                  (i) The parties each agree to deliver or cause to be delivered
         to the others on the Closing Date, and at such other times thereafter
         as shall be reasonably requested, any additional instrument that the
         other may reasonably request for the purpose of carrying out this
         Agreement.

                  (ii) After the Closing, Seller and Purchaser shall, and shall
         cause their affiliates to, execute, acknowledge and deliver all such
         further conveyances, transfer orders, division orders, notices,
         assumptions, releases and acquittances, and such other instruments, and
         shall take such further actions as may be necessary or appropriate to
         assure fully to Purchaser, its successors or assigns, all of the
         Transferred Assets intended to be conveyed to Purchaser by the
         Instruments of Transfer pursuant to this Agreement, and to assure fully
         to Seller and its affiliates and its successors and assigns, the
         assumption of the liabilities and obligations intended to be assumed by
         Purchaser pursuant to this Agreement.

         13.2.8 PRESERVATION OF BOOKS AND RECORDS. For a period of seven (7)
years (five (5) years with respect to geophysical data related to the
Transferred Assets) after the Closing Date, Purchaser and Seller (if and to the
extent Seller has retained any of the hereinafter described records not
delivered to Purchaser at Closing) shall (i) preserve and retain the corporate,
accounting, legal, auditing and other books and records that relate to the
conduct of Seller's businesses and operations prior to the Closing Date
(including, but not limited to, any documents relating to any governmental or
non-governmental actions, suits, proceedings or investigations arising out of
the conduct of the business and operations of Seller prior to the Closing Date
and including, but not limited to, all financial statements and other data and
information necessary or desirable for Purchaser to comply with their public
reporting requirements) and (ii) make such books and records available at their
then current administrative headquarters to the other party and its officers,
employees, agents and affiliates upon reasonable notice and at reasonable times,
it being understood that such other party shall be entitled to make and retain
copies of any such books and records as it shall deem necessary. Purchaser and
Seller agrees to permit representatives of the other party to meet with its
employees on a mutually convenient basis in order to enable such other party to
obtain additional information and explanations of any materials provided
pursuant to this Section 13.2.8.

              -the remainder of this page left blank intentionally-

                                       24
<PAGE>   26



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


PURCHASER:                           GOLDKING TRINITY BAY CORP.

                                     By:___________________________________
                                     Name:_________________________________
                                     Title:________________________________


SELLER:                              BENTON OIL & GAS COMBINATION
                                     PARTNERSHIP 1991-1, L.P.

                                     By:   BENTON OIL AND GAS COMPANY,
                                           Managing General Partner

                                     By:___________________________________
                                     Name:_________________________________
                                     Title:________________________________



                                       25
<PAGE>   27
                                                                      APPENDIX A

                                   Definitions

         Capitalized terms used in this Agreement shall have the meanings
ascribed to them in this Appendix A unless such terms are defined elsewhere in
this Agreement:

         Agreed Interest Rate: Ten percent (10%) per year.

         Best Efforts: A party's best efforts in accordance with reasonable
commercial practices and without the incurrence of unreasonable expense.

         Claim Notice: A written notice delivered by an Indemnified Party to an
Indemnifying Party pursuant to Section 10.6.1 describing in reasonable detail
the nature of a Third-Party Claim that could give rise to a right of
indemnification under this Agreement.

         Claimed Interest Additions: The Interest Additions claimed by Seller on
the list to be submitted to Purchaser within thirty (30) days after the date of
this Agreement pursuant to Section 6 3.

         Closing: The closing of the transactions contemplated by this 
Agreement.

         Closing Date: The date of the Closing.

         Code: The Internal Revenue Code of 1986, as amended.

         Data Rooms: The data rooms prepared by Seller to provide information to
Persons considering the acquisition of the Transferred Assets

         Defensible Title: Such title to the Transferred Interests, free and
clear of all Encumbrances other than Permitted Encumbrances, that is deducible
of record and free from reasonable doubt to the end that a prudent person
engaged in the business of the ownership, development and operation of producing
oil and gas properties, with knowledge of all the facts and the legal bearing of
such facts and the commercial effect of such facts on the continued control and
operation of the Transferred Assets, would be willing to accept such title.

         Effective Time: The effective time of the transfer of the Transferred
Assets to Purchaser, which shall be deemed to be 7:00 a.m., Houston, Texas time,
on January 1, 1995.

         Election Period: The 30-day period following receipt by an Indemnifying
Party of a Claim Notice.

         Encumbrance: Any mortgage, lien, security interest, pledge, charge,
encumbrance, claim, limitation, preferential right to purchase, consent to
assignment, irregularity, burden or defect or any other claim that Seller does
not own the Warranted Interest.

         Entity: A corporation, partnership, joint venture, trust or
unincorporated organization or association or other entity.


                                   Appendix A
                                     Page 1
<PAGE>   28

         Environmental Laws: All federal, state and local laws relating to the
protection of human health and safety or the environment, including but not
limited to the federal Comprehensive Environmental Response, Compensation, and
Liability Act, the Resource Conservation and Recovery Act, the Safe Drinking
Water Act, the Toxic Substances Control Act, the Clean Water Act, the Coastal
Zone Management Act, the Endangered Species Act, the Oil and the Hazardous
Materials Transportation Act, all as amended, and all analogous state and local
laws.

         Environmental Indemnity Period: The period beginning on the Closing
Date and ending two (2) years after the Closing Date.

         Governmental Authority: The United States of America, any state,
commonwealth, territory or possession thereof and any political subdivision of
any of the foregoing, including but not limited to courts, departments,
commissions, boards, bureaus, agencies or other instrumentalities.

         Hazardous Substance: Any substance or material now or hereafter defined
as a "hazardous substance", "hazardous material", "hazardous waste",
"contaminant", or "pollutant" under any environmental laws, including but not
limited to Section 1.01 of the Comprehensive Environmental Response,
Compensation and Liability Act, 4-2 U.S.C.A. 9601.

         Hydrocarbons: Oil, gas, minerals (including but not limited to sulfur)
and other gaseous and liquid hydrocarbons or any combination thereof.

         Indemnified Party: A party claiming indemnification under this
Agreement (other than a claim for indemnification under Section 10.4, Article VI
or Article VIII).

         Indemnifying Party: A party from whom indemnification under this
Agreement (other than indemnification under Section 10.4, Article VI or Article
VIII) is sought.

         Indemnity Notice: A written notice from an Indemnified Party to an
Indemnifying Party with respect to a claim for indemnification under this
Agreement (other than indemnification under Section 10.4, Article VI or Article
VIII) not involving a Third-Party Claim, which notice shall describe in detail
the nature of the claim and set forth an estimate of the amount of damages
attributable to such claim and the basis of the Indemnified Party's request for
such indemnification.

         Initial Payment: The initial payment of the Purchase Price in the
amount of TWO THOUSAND EIGHT HUNDRED TWENTY-FOUR DOLLARS ($2,824), paid by
Purchaser to Seller, on the date this Agreement was executed.

         Knowledge: The actual knowledge of each executive officer of Seller
(assuming such Seller is a corporation, and if not, a Person in a similar
capacity) after reasonable inquiry, or Purchaser, as the case may be.

         Leases: As defined in the Instruments of Transfer.

         Legal Requirement: Any law, statute, ordinance, decree, requirement,
order, judgment rule or regulation of, including the terms of any license or
permit issued by, any Governmental Authority.

         Material Adverse Effect: Any material adverse effect on or with respect
to the Transferred Assets or on the business, operations, prospects or condition
of the Transferred Assets, taken as a whole.

                                  Appendix A
                                     Page 2

<PAGE>   29

         Net Revenue Interest: The interest (expressed as a percentage) of
Seller in and to Hydrocarbons produced from or allocated to a Property after
deducting all applicable Production Burdens.

         NGA: The Natural Gas Act of 1938.

         NGPA: The Natural Gas Policy Act of 1978.

         Permitted Encumbrances: Any or all of the following:

                  (i) encumbrances that arise under operating agreements to
         secure payment of amounts not yet delinquent and are of a type and
         nature customary in the oil and gas industry;

                  (ii) encumbrances that arise as a result of pooling and
         unitization agreements, and production sales contracts securing the
         payment of amounts not yet delinquent;

                  (iii) consents to assignment by Governmental Authorities (a)
         that are obtained on or prior to the Closing Date or (b) that are
         customarily obtained after the consummation of transactions of the
         nature contemplated by this Agreement;

                  (iv) conventional rights of reassignment obligating Seller to
         reassign its interest in any portion of the Properties to a third party
         in the event it intends to release or abandon such interest prior to
         the expiration of the primary term or other termination of such
         interest;

                  (v) easements, rights-of-way, servitudes, permits, surface
         leases, surface use restrictions and other surface uses and impediments
         on, over or in respect of any of the Properties that are not such as to
         interfere materially with the operation, value or use of any of the
         Properties;

                  (vi) such Title Defects and Environmental Defects as Purchaser
         has expressly waived in writing;

                  (viii) such Title Defects for which Purchaser failed to give
         timely notice according to Section 6.2;

                  (ix) such Environmental Defects (to the extent the Purchaser
         has Knowledge of such Environmental Defect) for which Purchaser failed
         to give timely notice according to Section 6.2 or for which Purchaser
         failed to provide written information as required by Section 6.2;

                  (x) rights reserved to or vested in any municipality or
         governmental, tribal, statutory or public authority to control or
         regulate any of the Properties in any manner, and all applicable laws,
         rules and orders of any municipality or governmental or tribal
         authority;

                  (xi) all production burdens that do not operate to (A) reduce
         the Net Revenue Interest below the Warranted Interest or (B) increase
         the Working Interest above the Warranted Interest;

                  (xii) the preferential purchase rights for which waivers have
         been obtained prior to the Closing Date;

                                  Appendix A
                                     Page 3
<PAGE>   30

                  (xiii) the terms and conditions of the Contracts, insofar and
         only insofar as the Contracts do not operate to (A) reduce the Net
         Revenue Interest of Seller below that set forth on Exhibit A hereto,
         (B) increase the Working Interest of Seller above that set forth on
         Exhibit A hereto without a proportionate increase in the Net Revenue
         Interest of Seller.

                  (xiv) any other Encumbrance affecting any portion of a
         Transferred Asset that individually does not materially adversely
         affect the operation, value or use of any such Transferred Asset; and

                  (xv) solely during the period prior to the Closing, any
         Encumbrance that is released on or before Closing.

         Person: shall mean a corporation, an association, a partnership, an
organization, a business, an individual, a government or political subdivision
thereof, or a governmental agency.

         Production Burdens: All royalty interests, overriding royalty
interests, production payments, net profits interests or other similar interests
that constitute a burden on, are measured by or are payable out of the
production of Hydrocarbons or the proceeds realized from the sale or other
disposition thereof.

         Purchase Price Adjustment Amount: The net adjustment to the Purchase
Price to be made pursuant to Section 1.3.1.

         Purchase Price Adjustment Certificate: A statement of the Purchase
Price Adjustment Amount (specifying whether the Purchase Price is to be
increased or decreased by such amount), which shall be certified by an officer
of Seller.

         Seller's Affiliate: Any person that directly or indirectly, through one
or more intermediaries, controls, is controlled by or is under common control
with, such Seller.

         Subsidiary: shall mean, as to a Person, any other Person (a) more than
50% of the outstanding voting stock of which is held, directly or indirectly, by
such Person, or (b) over which such Person has the power, directly or
indirectly, to designate a majority of the directors thereof (if such other
Person is a corporation) or the individuals exercising similar functions (if
such other Person is unincorporated).

         Third-Party Claim: A third-party claim asserted against an Indemnified
Party that could give rise to a right of indemnification under this Agreement
(other than a right of indemnification under Section 10.4, Article VI or Article
VIII).

         Transferred Assets: As defined in Section 1.1.

         Warranted Interests: those interests whereby a Seller is (i) entitled
to receive not less than the "Net Revenue Interest" set forth on Exhibit A
hereto of all oil, gas and associated liquid and gaseous Hydrocarbons produced,
saved and marketed from the Properties, without reduction, throughout the
productive life of such Properties and (ii) obligated to bear the percentage of
the costs and expenses related to the maintenance, development and operation of
the Properties in an amount not greater than the "Working Interest" set forth on
Exhibit A hereto, without increase, throughout the productive life of such
Properties, except increases that result in a proportionate increase in such
Seller's Net Revenue Interest and increases that results from contribution
requirements with respect to defaulting co-owners.


                                  Appendix A
                                     Page 4
<PAGE>   31

         Working Interest: The interest (expressed as a percentage) of a Seller
in any Transferred Asset before giving effect to any applicable Production
Burdens and the percentage of all costs and expenses associated with the
exploration, development and operation of such Transferred Asset required to be
borne by such Seller.


                                  Appendix A
                                     Page 5
<PAGE>   32




                                 SCHEDULE 1.2.1

                         INDIVIDUAL INTEREST VALUATIONS

<TABLE>
<CAPTION>
                                              WORKING            NET REVENUE         PURCHASE
         SELLER                               INTEREST           INTEREST            PRICE
<S>                                           <C>                <C>                 <C> 
         Benton Oil & Gas Combination         2.824751%          2.358666%           $216,093.00
         Partnership 1991 -1, L.P.,
         a California limited partnership
</TABLE>


                                  Appendix A
                                     Page 6
<PAGE>   33

                 BILL OF SALE, CONVEYANCE AND PARTIAL ASSIGNMENT

STATE OF TEXAS        )
                      )
COUNTY OF CHAMBERS    )

         This Bill of Sale, Conveyance and Partial Assignment is from BENTON OIL
& GAS COMBINATION PARTNERSHIP 1991-1 L.P., a California limited partnership,
whose mailing address is 1145 Eugenia Place, Carpinteria, California
("Grantor"), to GOLDKING TRINITY BAY CORP., a Texas corporation ("Grantee"),
whose mailing address is 1221 McKinney, Suite 1800, Houston, Texas 77002.

                                       I.

         NOW, THEREFORE, for and in consideration of Ten and No/100 Dollars
($10.00) and other good and valuable consideration, the receipt and sufficiency
of which are hereby acknowledged, Grantor has granted, bargained, sold,
transferred, assigned and conveyed, and by these presents does hereby grant,
bargain, sell, transfer, assign and convey unto Grantee, its successors and
assigns, subject to the hereinafter stated exceptions, restrictions, covenants
and conditions, all of Grantor's interest in and to the following described
properties, to-wit:

         (a)      the leasehold estate created by each of the Oil, Gas and
                  Mineral Leases listed and described in Exhibit "A", which is
                  annexed hereto and incorporated herein for all purposes, such
                  leases being hereinafter sometimes referred to as "Subject
                  Leases:'

         (b)      All payments out of production, overriding royalty interests,
                  carried interests, reversionary interests, and all other
                  rights and interests incident to, or held and owned by Grantor
                  in connection with the Subject Leases, save and except the
                  overriding royalty excepted and reserved hereinbelow by
                  Grantor;

         (c)      All oil, gas, condensate, casinghead gas and other related
                  hydrocarbon substances produced and saved subsequent to the
                  Effective Date of this conveyance from lands covered and
                  affected by the Subject Leases. (The interest described under
                  subparagraphs (a) and (b) above, and this subparagraph (c) are
                  hereinafter sometimes collectively referred to as "Subject
                  Properties");

         (d)      All personal property and facilities located on lands covered
                  by the Subject Leases or the Subject Interests, or both,
                  incident to or held and used in connection with the Subject
                  Interests, including, but not limited to, all tanks, tank
                  batteries, gas plants, disposal facilities, buildings,
                  structure, platforms, field separators and liquid extractors,
                  treators, dehydrators, compressors, pumps, pumping units,
                  valves, fittings, machinery and parts, engines, boilers,
                  meters, apparatus, implements, tools, appliances, cables,
                  wires, towers, casing, tubing and rods, gathering lines or
                  other pipelines, field gathering systems and any and all other
                  fixtures and equipment of every type and description to the
                  extent that the same are used or held in connection with the
                  ownership or operation of the Subject Interests;


<PAGE>   34

         (e)      All oil, natural gas or water source wells, whether producing,
                  operating, shut-in, or temporarily abandoned; all types of
                  injection wells; and all equipment used or held by Grantor in
                  connection with the production of oil, gas, condensate,
                  casinghead gas and other related hydrocarbon substances from
                  or attributable to lands covered by the Subject Leases;

         (f)      All tenements, appurtenances, surface leases, easements,
                  permits, licenses, servitudes, or rights-of-way in any way
                  appertaining, belonging, affixed and used in connection with,
                  or incident to, the ownership and operation of the Subject
                  Interests, including, but not limited to, those tenements,
                  appurtenances, surface leases, easements, permits, licenses,
                  servitudes or rights-of-way listed and described in Exhibit
                  "B", annexed hereto and incorporated herein for all purposes;

         (g)      All leases, options, rights of first refusal, orders,
                  contracts, operating agreements, bottom-hole agreements,
                  farmin/farmout agreements, acreage contribution agreements,
                  unit agreements, processing agreements, maintenance
                  agreements, purchase and sale agreements for gas, oil or other
                  minerals, and other agreements and instruments to the extent
                  that same relate, appertain, belong or are in any way
                  incidental to the ownership of the Subject Interests by
                  Grantor, including, but not limited to, those listed and
                  described in Exhibit "C", annexed hereto and incorporated
                  herein for all purposes;

         (h)      All lease files, land files, well files, abstracts, title
                  opinions, title curative, accounting records, royalty payment
                  records, seismic records and surveys, gravity maps, electric
                  logs, contracts, correspondence, microfiche lists, geological
                  and geophysical maps, pressure date and decline curves,
                  graphical production curves and other geological or
                  geophysical data, records and other documents and records of
                  every kind and description which relate to and are possessed
                  by Grantor in connection with the Subject Interests, to the
                  extent and as provided for or limited by that certain Purchase
                  and Sale Agreement dated effective April 1, 1989 by and
                  between Grantor and Texaco Producing Inc.; and

         (i)      Any and all monies held by any individual, partnership, or
                  corporate entity, whether or not such monies are held in
                  escrow, payable to either Texaco Producing Inc. or Grantor, or
                  both, for oil, gas condensate, casinghead gas or other related
                  hydrocarbon substance produced and saved from or attributable
                  to the Subject Leases and purchased by such individual,
                  partnership or corporate entity subsequent to the Effective
                  Date of this conveyance.

         The interests described under subparagraph (a) through (i) hereinabove
are herein sometimes collectively referred to as "Subject Interests".

                                       II.

         This Bill of Sale, Conveyance and Assignment is made by Grantor and
accepted by Grantee subject to the following:

         (a)      All the terms, conditions and obligations contained and
                  provided for in the Subject Leases;


                                       2
<PAGE>   35

         (b)      The terms and conditions of all existing orders, rules,
                  regulations and ordinances of any federal, state or other
                  governmental agency that are applicable or related to the
                  Subject Interests;

         (c)      The terms and conditions of the Purchase and Sale Agreement,
                  dated the same date as this conveyance instrument, by and
                  between Grantor, as a Seller and Grantee as the Purchaser,
                  concerning the Subject Interests; and

         (d)      Grantee accepting the Subject Interest in its "as is, where
                  is" condition; Grantor disclaiming any and all liability
                  arising in connection with any environmental matters,
                  including, without limitation, any presence of naturally
                  occurring radioactive material on the property; and Grantee
                  expressly waiving the provisions of Chapter XVII, Subchapter
                  E, Sections 17.41 through 17.63, inclusive, except Section
                  17.555 which is not waived, of Vernon's Texas Code Annotated,
                  Business and Commerce Code. In addition, there are no
                  warranties or representations, either express or implied, as
                  to the quality or quantity of the hydrocarbon reserves, if
                  any, attributable to the interest conveyed herein or the
                  ability of the property to produce hydrocarbons.

         TO HAVE AND TO HOLD all and singular the Subject Interest, as
hereinabove described, unto Grantee, its successors and assigns, and Grantor,
for itself, its successors and assigns, does hereby WARRANT AND FOREVER DEFEND,
all and singular, title to the Subject Interests, free from all liens, claims,
assessments and encumbrances, other than the existing burdens, unto Grantee,
Grantee's successors and assigns, against every person lawfully claiming or to
claim the same, or any part hereof, BY, THROUGH OR UNDER GRANTOR, BUT NOT
OTHERWISE. The reference herein to the "existing burdens" is for the purpose of
protecting Grantor on Grantor's warranties, and shall not create, nor constitute
a recognition of any rights in third parties. Grantor grants unto Grantee full
power and right of substitution and subrogation in and to all covenants and
warranties by others heretofore given or made in respect of the Subject
Interests.

                                      III.

         The provisions hereof shall inure to the benefit of and be binding upon
the parties hereto, their respective legal representatives, successors and
assigns.

         IN TESTIMONY WHEREOF, this Conveyance is executed on the dates and at
the places indicated in the respective acknowledgments below, but is stipulated
herein to be effective as of 7:00 a.m., C.D.S.T., the 1st day of January, 1995.

GRANTOR:                               BENTON OIL & GAS COMBINATION
                                       PARTNERSHIP 1991-1, L.P.

                                       By:_______________________________



                                       3
<PAGE>   36


                                [acknowledgments]










                                       4

<PAGE>   1
                                                                    EXHIBIT 5.1



               [EMENS, KEGLER, BROWN, HILL & RITTER LETTERHEAD]

                               October 3, 1995





Benton Oil and Gas Company
1145 Eugenia Place
Suite 200
Carpinteria, California  93013

Gentlemen:

  We have acted as counsel for Benton Oil and Gas Company (the "Company") in
connection with the registration under the Securities Act of 1933, as amended,
of up to 189,068 shares of common stock, $0.01 par value per share (the
"Shares"), and 651,610 Warrants to purchase shares of common stock (the
"Warrants"), and the 651,610 shares of Common Stock issuable upon exercise of
the Warrants to be offered to holders of partnership interests in the Benton
Oil & Gas Combination Partnership 1989-1 L.P., the Benton Oil & Gas Combination
Partnership 1990-1 L.P., and the Benton Oil & Gas Combination Partnership
1991-1 L.P. (the "Partnerships") in exchange for such partnership interests. In
this connection, we have examined the Certificate of Incorporation, the Bylaws
and the respective amendments thereto, the directors' and stockholders'
minutes, and the Registration Statement filed with the Securities and Exchange
Commission, and exhibits thereto, and such other documents that we have deemed  
necessary to the opinion hereinafter expressed.

  We are of the opinion that the Shares are validly authorized and upon their
issuance in exchange for partnership interests in the Benton Oil & Gas
Combination Partnership 1989-1 L.P., the Benton Oil & Gas Combination
Partnership 1990-1 L.P., and the Benton Oil & Gas Combination Partnership
1991-1 L.P. as contemplated by the Registration Statement, will be legally
issued, fully paid, and non-assessable.

  We are of the opinion that the Warrants are validly authorized and upon their
issuance in exchange for partnership interests in the Partnerships will be
legally issued.
<PAGE>   2
               [EMENS, KEGLER, BROWN, HILL & RITTER LETTERHEAD]


  We are of the opinion that the Shares to be issued upon exercise of the 
Warrants as contemplated by the Warrant Agreement will be validly authorized, 
legally issued, fully paid, and non-assessable. 

  We hereby consent to the reference to Emens, Kegler, Brown, Hill & Ritter
Co., L.P.A. appearing under the heading "Legal Matters" in the Registration
Statement and any amendments thereto and the Prospectus of the Company relating
to the proposed exchange of the Shares and Warrants. 

                               Very truly yours,

                               EMENS, KEGLER, BROWN, HILL & RITTER CO., L.P.A.


                              
                               By:  /s/ Jack A. Bjerke
                                   _______________________________________
                                    Jack A. Bjerke, Vice President

<PAGE>   1
                                                                Exhibit 8.1

                     EMENS, KEGLER, BROWN, HILL & RITTER
                                      
                       A Legal Professional Association
                       ATTORNEYS AND COUNSELORS AT LAW
                                CAPITOL SQUARE
                                  SUITE 1800
                             65 EAST STATE STREET
                          COLUMBUS, OHIO  43215-4294
                            _____________________




                               October 2, 1995



Benton Oil and Gas Company
Attention:  Gregory S. Grabar
1145 Eugenia Place, Suite 200
Carpinteria, California 93013

Re:     Form S-4 Registration Statement under Securities Act of 1933
        SEC File Number 33-61299-Federal Tax Consequences

Dear Mr. Grabar:

        We have acted as counsel to Benton Oil and Gas Company, a Delaware
corporation (the "Company"), in connection with the registration under the
Securities Act of 1933 of the Company's Common Stock and Warrants. In this
connection, we have examined the registration statement on Form S-4 (the
"Registration Statement"), including the proxy statement-prospectus which
forms a part of the Registration Statement (the "Prospectus") and such other
documents as we deem necessary for the purposes of this opinion.

        Based on the foregoing and subject to the limitations set forth herein,
it is our opinion that the description of federal income tax consequences
included in the Prospectus under the heading "Certain Federal Tax Consequences"
accurately sets forth the federal income tax consequences under existing law
relating to the Exchange to which such discussion refers.

        We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement.  In giving this consent, we do not admit that we are
within the category of persons whose consent is required by Section 7 of the
Securities Act of 1933, as amended.
                                        Sincerely yours,

                                        EMENS, KEGLER, BROWN, HILL & RITTER

                                        By: /s/ Jack A. Bjerke
                                            -------------------------------
                                            Jack A. Bjerke, Vice President      
                        
                

<PAGE>   1
                                                                   Exhibit 23.1
INDEPENDENT AUDITORS' REPORT

We consent to the use in this Registration Statement of Benton Oil and Gas
Company on Form S-4 of our reports dated March 31, 1995 relating to the
financial statements of Benton Oil and Gas Company, Benton Oil & Gas
Combination Partnership 1989 - 1, L.P., Benton Oil & Gas Combination
Partnership 1990 - 1, L.P. and Benton Oil & Gas Combination Partnership 1991 -
1, L.P., appearing in the Prospectus, which is a part of such Registration
Statement, and to the reference to us under the heading "Experts" in such
Prospectus.

Deloitte & Touche LLP

Deloitte & Touche LLP

Los Angeles, California
September 28, 1995

<PAGE>   1


                                                                Exhibit 23.3

                            Huddleston & Co., Inc.

                      Petroleum and Geological Engineers

                            1111 FANNIN-SUITE 1700

                            HOUSTON, TEXAS  77002
                              _________________

                                (713) 658-0248

                  CONSENT OF INDEPENDENT PETROLEUM ENGINEER
                  -----------------------------------------

Gentlemen:

        Huddleston & Co., Inc., hereby consents to the use of its name, use of  
its audit reports, and reference to it regarding its audit of the Benton Oil
and Gas Company reserve reports, prepared by Benton Oil and Gas Company, dated
March 8, 1995, included in Amendment No. 1 to the Form S-4 Registration
Statement, or included therein by reference to the Form 10-K for the year ended
December 31, 1994, of Benton Oil and Gas Company registering shares of its
common stock for exchange to holders of partnership interests in Benton Oil &
Gas Combination Partnership 1989-1, L.P., Benton Oil & Gas Combination
Partnership 1990-1, L.P., and Benton Oil & Gas Combination Partnership 1991-1,
L.P.

                                        HUDDLESTON & CO., INC.


                                        /s/ Peter D. Huddleston
                                        -------------------------------------
                                        Peter D. Huddleston, P.E.
                                        President

Date:  September 28, 1995

                                                


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