AGREEMENT

                                      BETWEEN

                       ATLAS PETROLEUM INTERNATIONAL LIMITED

                                        AND

                           SUMMIT PARTNERS MANAGEMENT CO.


                                    RELATING TO:

                             OIL PROSPECTING LICENSE 75

                            FEDERAL REPUBLIC OF NIGERIA






                                  TABLE OF CONTENTS


                                                                  
ARTICLE 1                                                             2
     1.0 DEFINITIONS                                                  2

ARTICLE 2                                                             4
      2.0 TERM                                                        4

ARTICLE 3                                                             5
     3.0 ASSIGNMENT                                                   5

ARTICLE 4                                                             6
     4.0 GOVERNMENT APPROVAL                                          6

ARTICLE 5                                                             7
     5.0 REPRESENTATIONS AND WARRANTIES; INDEMNITY                    7

ARTICLE 6                                                             9
     6.0 SUMMIT'S OBLIGATIONS                                         9

ARTICLE 7                                                             10
     7.0 PRODUCTION, TAXES AND ROYALTIES                              10

ARTICLE 8                                                             12
      8.0 CONDITIONS PRECEDENT                                        12

ARTICLE 9                                                             14
     9.0 OTHER AGREEMENTS/LEGISLATION                                 14

ARTICLE 10                                                            19
     10.0 FORCE MAJEURE                                               19

ARTICLE 11                                                            20
     11.0 ASSIGNMENT                                                  20

ARTICLE 12                                                            21
     12.0 GOVERNING LAW, ARBITRATION AND LIABILITIES                  21

ARTICLE 13                                                            24
     13.0 NOTICIES                                                    24

ARTICLE 14                                                            25
     14.0 CONFIDENTIALITY                                             25

ARTICLE 15                                                            27
     5.0 MISCELLANEOUS                                                27


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                                  AGREEMENT

       THIS AGREEMENT, made and entered into this l7th day of July, 1992,
between ATLAS PETROLEUM INTERNATIONAL LIMITED, a corporation organized and
existing under the laws of the Federal Republic of Nigeria (hereinafter
referred to as "ATLAS"), and SUMMIT PARTNERS MANAGEMENT CO., a corporation
organized and existing under the laws of the State of Texas, United States of
America (hereinafter referred to as "SUMMIT").

                              W I T N E S S E T H

WHEREAS, ATLAS has been awarded an Oil Prospecting License covering Block 75
in the Federal Republic of Nigeria, a copy of which is attached to this
Agreement as EXHIBIT "A" (hereinafter referred to as the "OPL"); and

       WHEREAS, ATLAS has agreed to assign to SUMMIT an undivided thirty
percent (30%) interest in the OPL; and

       WHEREAS, SUMMIT desires to acquire from ATLAS an undivided thirty
percent (30%) interest in the OPL for the consideration and upon the terms
and conditions contained herein; and

       WHEREAS, the OPL has been awarded to ATLAS on condition that ATLAS
shall be the Operator of the License Area (as hereinafter defined), which
condition shall further be spelled out in the Operating Agreement (as
hereinafter defined).

       NOW, THEREFORE, in consideration of the mutual covenants and promises
set forth below, the Parties do hereby agree as follows:

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ARTICLE 1

1.0 DEFINITIONS

1.1 "AFFILIATE" shall mean, with respect to a Party, a corporation or other
entity that controls or is controlled by such Party or a corporation or other
entity which controls or is controlled by a corporation or other entity which
controls such Party directly or indirectly. For purposes hereof, "control"
shall mean ownership by one corporation or other entity of more than
twenty-five percent (25%) of the voting rights of the other corporation or
other entity.

1.2 "AGREEMENT" shall mean this Agreement between ATLAS and SUMMIT relating
to the OPL.

1.3 "APPROVAL DATE" shall mean the date on which the Assignment is approved
by the Government.

1.4 "THE 30% INTEREST" shall mean the undivided thirty percent (30%) interest
in the OPL to be assigned by ATLAS to SUMMIT hereunder.

1.5 "ASSIGNMENT" shall mean that certain instrument to be executed by ATLAS
and SUMMIT whereby ATLAS assigns The 30% Interest to SUMMIT, which shall be
substantially in the form set forth in EXHIBIT "B" .

1.6 "ASSIGNMENT DATE" shall mean the date on which ATLAS assigns The 30%
Interest to SUMMIT.

1.7 "DOLLARS" or "US$" shall mean the currency of the United States of
America.

1.8 "ECODRILL CONTRACT" shall mean that certain Agreement dated February 7,
1992 between ATLAS and Ecodrill U.S. Inc., covering the OPL.

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1.9 "EXPLORATION COSTS" shall mean Petroleum Costs as such term is defined in
the Operating Agreement.

1.10 "FORCE MAJEURE" shall be as defined in Article 10 below.

1.11 "Government" shall mean the Government of the Federal Republic of
Nigeria.

1.12 "INTERIM MANAGEMENT COMMITTEE" shall be as defined in Article 9.3 below.

1.13 "LICENSE AREA" shall mean that geographical area covered by the OPL, as
more particularly outlined and described in the schedules attached to the OPL
and as reduced from time to time in accordance with the provisions of
Petroleum Decree 1969 and the Petroleum (Drilling and Production) Regulations
1969, as amended. The License Area is shown on EXHIBIT "C" attached to this
Agreement.

1.14 "MANAGEMENT COMMITTEE" shall be as defined in Article 9.2(d) below.

1.15 "MPMR" shall mean the Ministry of Petroleum and Mineral Resources.

1.16 "OIL MINING LEASE" shall mean an Oil Mining Lease resulting from the OPL
obtained in accordance with the laws of the Federal Republic of Nigeria.

1.17 "OPERATING AGREEMENT" shall mean the Joint Operating Agreement to be
entered into between ATLAS and SUMMIT to govern the conduct of petroleum
operations under the OPL and any Oil Mining Leases resulting therefrom, using
the document attached as EXHIBIT "D" as the basis for negotiations.

1.18 "PARTICIPATING INTEREST" shall mean the undivided interest held at any
given time by ATLAS and, after approval of the Assignment by the Government,
by SUMMIT in and to the OPL, the License Area and the Operating Agreement.

1.19 "PARTY" OR "PARTIES" shall mean ATLAS and/or SUMMIT, individually or
jointly, as the text may require.

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1.20 "PAYOUT" shall mean that point in time when SUMMIT has been paid out of
revenues attributable to the sale of Hydrocarbons produced from the License
Area, after deducting its proportionate share of Royalties and Petroleum
Profits Tax, an amount equal to one hundred percent (100%) of the costs and
expenses paid by SUMMIT pursuant to the terms of this Agreement. After Payout
has occurred, there shall be no reversion to a "before Payout" status.

1.21 "PETROLEUM PROFITS TAX" shall mean the tax imposed upon the sale of
Hydrocarbons under the Petroleum Profits Tax Act of 1959, as amended.

1.22 "ROYALTIES" shall be as defined in Article 7.1(a) below.

1.23 All terms, other than the foregoing terms, which are not defined in this
Agreement but which are defined in the Operating Agreement shall have the
same meaning as expressed in the Operating Agreement.

ARTICLE 2

2.0    TERM

2.1 This Agreement shall be effective as of the date first written above and,
except as otherwise provided in this Agreement, shall continue until the
occurrence of Payout. Thereafter, the rights, duties and obligations of the
Parties with respect to the OPL and the License Area shall be governed by the
terms and provisions of the Operating Agreement.

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ARTICLE 3

3.0 ASSIGNMENT

       3.1    (a)    Subject to the conditions of this Agreement and in exchange
                     for the consideration set forth in Article 6 below, ATLAS
                     hereby agrees to assign The 30% Interest to SUMMIT.

              (b)    Subject to the conditions of this Agreement, SUMMIT hereby
                     agrees to accept such assignment of The 30% Interest and to
                     perform its obligations as set forth in Article 6 below.

       3.2    The Assignment shall be free of all liens, claims, mortgages and
              encumbrances and shall be thirty percent (30%) of one hundred
              percent (100%) of ATLAS' interests in data, materials, equipment
              and other assets now owned or hereafter acquired pertaining to or
              in connection with the OPL (hereinafter referred to as the
              "Assets").

       3.3     The Assignment shall be executed contemporaneously with the
              execution of this Agreement. The Assignment shall be subject to
              approval by the Government and will become effective as of the
              Approval Date. Between the Parties, the Assignment and this
              Agreement shall be effective as of the Assignment Date, and ATLAS
              and SUMMIT shall be bound by this Agreement and shall fully
              perform all of their respective obligations under this Agreement,
              pending approval of the Assignment by the Government, in
              accordance with and subject to the terms of this Agreement.

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       3.4    AFTER THE APPROVAL OF THE ASSIGNMENT, the RESPECTIVE PARTICIPATING
              INTERESTS OF THE PARTIES in THE OPL SHALL be AS FOLLOWS:



              COMPANY              PARTICIPATING INTEREST
              -------              ----------------------
                                
              ATLAS                       70%

              SUMMIT                      30%


              THE DISPROPORTIONATE SHARING OF REVENUES CONTEMPLATED BY ARTICLE
              7.1(e) SHALL in NO WAY AFFECT THE PARTIES' OWNERSHIP OF THEIR
              RESPECTIVE PARTICIPATING INTEREST SHARES in THE OPL.

ARTICLE 4

4.0 GOVERNMENT APPROVAL

       4.1    As soon as reasonably possible following the execution of the
       Assignment, ATLAS shall submit the Assignment to the Government
       requesting approval of the Assignment. ATLAS shall promptly provide
       SUMMIT with satisfactory evidence of the submission of the Assignment to
       the Government. In addition, ATLAS shall keep SUMMIT fully informed with
       respect to the status of such approval and shall promptly advise SUMMIT
       of any communications to or from the Government relating to the
       Assignment. ATLAS agrees to use good faith and reasonable efforts and to
       perform all reasonable and required acts in order to obtain the
       Government's approval of the Assignment.

       4.2    ATLAS shall bear and pay any and all benefit, stamp, transfer and
       documentary taxes, filing, registration, recording and notary fees or
       similar costs assessed by the Government in connection with the
       Assignment, and ATLAS agrees to indemnify and hold SUMMIT harmless from
       any such taxes, fees or other costs relating to the Assignment.

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ARTICLE 5

5.0 REPRESENTATIONS AND WARRANTIES; INDEMNITY

       5.1    ATLAS hereby represents and warrants that:

              (a)    Its corporate entity has been duly formed and currently
                     exists in good standing under the laws of the Federal
                     Republic of Nigeria and that it has full power and
                     authority to execute and deliver, and to complete its
                     obligations under, this Agreement; and the person or
                     persons signing this Agreement and the Assignment on behalf
                     of ATLAS has the authority to do so.

              (b)    As of the date of this Agreement and as of the Approval
                     Date, the OPL will be valid and in full force and effect in
                     all respects, without variance or amendment. Prior to the
                     Approval Date, without the prior written approval of SUMMIT
                     (which approval SUMMIT shall not delay or withhold
                     unreasonably), ATLAS shall not amend, surrender or withdraw
                     from the OPL.

              (c)    To the best of its knowledge, no act or omission of or
                     affecting ATLAS or affecting the OPL has occurred or will
                     occur prior to the Approval Date which would entitle the
                     Government to revoke or modify the OPL.

              (d)    All of the obligations contained in the OPL requiring
                     performance on or before the Assignment Date have been
                     fully and timely performed by ATLAS.

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              (e)    As of the Assignment Date, The 30% Interest will have good
                     and defensible title and will not be subject to any
                     material adverse contractual obligations, or any mortgages,
                     pledges, liens, burdens or other encumbrances created by
                     ATLAS and there is no agreement to create the same.

              (f)    There are no outstanding lawsuits or other proceedings and
                     there has been no judgment or award given or made by any
                     court, tribunal or governmental agency which relates to or
                     is connected with or relating to the OPL and, to the best
                     of its knowledge, there are no outstanding claims which
                     would affect the OPL or The 30% Interest being assigned to
                     SUMMIT pursuant to this Agreement.

              (g)    No payments were made or will be made, or consideration
                     given or will be given to obtain the OPL in violation of
                     Nigerian law or which would be in violation of the laws of
                     the United States of America or the State of  Texas, if
                     such payments were made or such consideration were given by
                     SUMMIT.

              (h)    As of the Assignment Date, ATLAS will be the sole legal and
                     beneficial owner of The 30% Interest with the right to
                     sell, transfer and assign the full legal and beneficial
                     ownership of The 30% Interest to SUMMIT.

              (i)    The Ecodrill Contract has terminated by its own terms and
                     is no longer in force effect with respect to any part of
                     the OPL.

              (j)    ATLAS shall indemnify and hold SUMMIT harmless from any
                     costs, expenses, claims, demands, actions or other
                     liability which SUMMIT may incur as a result of the failure
                     of any of the representations and/or the breach of any of
                     the warranties contained in this Article 5.1, including
                     without limitation those claims, demands or actions that
                     may be made by Ecodrill U.S., Inc. arising out of the
                     previous Ecodrill Contract.



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       5.2     SUMMIT hereby represents and warrants that:

              (a)    Its corporate entity has been duly formed and currently
                     exists in good standing under the laws of the State of
                     Texas and that it has full power and authority to execute
                     and deliver, and to complete its obligations under, this
                     Agreement; and the person or persons signing this Agreement
                     and the Assignment on behalf of SUMMIT has the authority to
                     do so.

              (b)    The execution and delivery of this Agreement by SUMMIT is
                     authorized by sufficient corporate action and, on the
                     Assignment Date, SUMMIT will have all necessary corporate
                     power and authority to execute and accept the Assignment.

              (c)    SUMMIT has the ability to meet all of its financial
                     obligations hereunder.

              (d)    SUMMIT has not gone into liquidation, made an assignment
                     for the benefit of creditors, declared or been declared
                     bankrupt or insolvent by a competent court or had a
                     receiver appointed in respect of the whole or any part of
                     its assets and has no plans to do so.

ARTICLE 6

6.0 SUMMIT'S OBLIGATIONS

       6.1    For and in consideration of receiving The 30% Interest from ATLAS,
              after SUMMIT has moved a drilling rig into the License Area and is
              set to commence actual drilling but prior to commencement of
              actual drilling, SUMMIT shall pay to ATLAS the sum of us Dollars
              One Million (US$1,000,000.00); provided, however, that SUMMIT
              shall have no obligation hereunder to make such payment until all
              of the conditions precedent set forth in Article 8.1 have been
              fully satisfied (or waived by SUMMIT and ATLAS has obtained the
              clearance of all necessary approvals, permits, etc.

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       6.2    Prior to Payout, and subject to the terms of Article 7, SUMMIT
              shall bear and pay the following costs and expenses:

              a.     All Exploration Costs incurred for the Joint Account on the
                     License Area;

              b.     In the event of a Commercial Discovery of Hydrocarbons, all
                     costs of all wells incurred on any Oil Mining Lease(s)
                     resulting from the OPL; and

              c.     All operating costs incurred on said Oil Mining Lease(s).

       6.3    After Payout, all costs and expenses attributable to the License
              Area shall be borne and paid by the Parties according to their
              respective Participating Interests in accordance with the terms
              and provisions of the Operating Agreement.

ARTICLE 7

7.0 PRODUCTONS, TAXES AND ROYALTIES

7.1 Upon evidence of the successful completion of a commercially viable well on
the License Area and the sale of Hydrocarbons produced therefrom, revenues from
the sale of Hydrocarbons shall be applied and/or distributed in the following
manner and order of priority:

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              (a)    Payment of royalties and other obligations to the MPMR
                     pursuant to the terms of the OPL and/or any Oil Mining
                     Leases resulting therefrom ("Royalties");

              (b)    Payment of Petroleum Profits Taxes and any other taxes
                     charged to the Parties, whether attributable to operations
                     on the License Area or to the Hydrocarbons sold therefrom;

              (c)    Payment of all actual ongoing costs, fees and expenses of
                     any kind whatsoever, including but not limited to general
                     administrative and overhead costs and interest expense,
                     incurred in connection with (i) the exploration,
                     development, operation or maintenance of the OPL and the
                     License Area for the production of Hydrocarbons, and (ii)
                     the lifting, handling, gathering, producing, treating,
                     storing, marketing or transporting of Hydrocarbons from the
                     OPL/Oil Mining Leases and the License Area (such costs,
                     fees and expenses are hereinafter referred to as "Costs");

              (d)    Distribution into a reserve fund such funds as may be
                     necessary to pay anticipated future Costs, the amount of
                     such reserve to be established and/or adjusted from time to
                     time by the Management Committee; and

              (e)    Any remaining revenues shall be distributed to the Parties
                     as follows:

                     (i)    Until Payout, ATLAS shall receive forty percent
                            (40%) and SUMMIT shall receive sixty percent (60%)
                            of such remaining revenues; and

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                     (ii)   After Payout, ATLAS shall receive seventy percent
                            (70%) and SUMMIT shall receive thirty percent (30% )
                            of all revenues in accordance with the terms and
                            provisions of the Operating Agreement.

       7.2    Prior to Payout, neither Party shall have the right to take in
              kind any of the Hydrocarbons produced from any and all Oil Mining
              Leases resulting from the OPL. All such production shall be
              marketed and sold under the direction of the Management Committee
              in accordance with the terms of the Operating Agreement. Royalties
              and Petroleum Profits Taxes shall be allocated to the Parties in
              the same proportion as revenues are being allocated to them under
              Article 7.1 (e) above.

       7.3    After Payout, ATLAS and SUMMIT shall each be entitled to take and
              receive their respective Participating Interest shares of all
              Hydrocarbons produced from any and all Oil Mining Leases resulting
              from the OPL in accordance with the terms and provisions of the
              Operating Agreement.

       7.4    After Payout, ATLAS and SUMMIT shall separately pay Royalties and
              Petroleum Profits Tax on the share of Hydrocarbons actually
              received by each Party.

ARTICLE 8

8.0 CONDITIONS PRECEDENT

       8.1    SUMMIT's obligation to make any payments or the performance by
              SUMMIT of its other obligations under this Agreement shall be
              subject to the prior satisfaction of the following conditions:

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              (a)    Execution and delivery of the Assignment by ATLAS to SUMMIT
                     and approval of such Assignment by the Government;

              (b)    Recording of the OPL and the Assignment from ATLAS to
                     SUMMIT in the appropriate records;

              (c)    Appropriate action by the Government acceptable to SUMMIT's
                     to legally permit and authorize SUMMIT to own up to a
                     thirty percent (30%) interest in the OPL and any resulting
                     Oil Mining Lease(s) and to share in any Hydrocarbons
                     produced therefrom and the revenues from the sale of such
                     Hydrocarbons;

              (d)    Assurances satisfactory to SUMMIT by the Government that
                     SUMMIT and its successors and assigns may freely export and
                     sell their share of Hydrocarbons produced from any Oil
                     Mining Lease(s) resulting from the OPL and may retain
                     abroad the proceeds of such sales; and

              (e)    The negotiation and execution of a mutually acceptable
                     Operating Agreement between ATLAS and SUMMIT in accordance
                     with the provisions of Article 9.1 and 9.2 below.

       8.2    If any of the conditions set forth in Article 8.1 have not been
              satisfied in the sole opinion of SUMMIT or waived in writing by
              SUMMIT within a period of thirty (30) days from the date of this
              Agreement, SUMMIT shall have the right and option, but not the
              obligation, to terminate this Agreement by giving written notice
              to ATLAS. In any event, failure by ATLAS to satisfy such
              conditions relieves SUMMIT of its obligations hereunder until such
              conditions are satisfied by ATLAS or waived by SUMMIT.

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ARITCLE 9

9.0 OTHER AGREEMENTS/LEGISLATION

       9.1    The activities of the Parties in the License Area shall be
              governed by the terms of the OPL and the Operating Agreement. The
              Parties shall use their best efforts to negotiate and execute the
              Operating Agreement within thirty (30) days after the date of this
              Agreement. If the Operating Agreement has not been executed within
              that period, SUMMIT and ATLAS each shall have the right and
              option, but not the obligation, to elect to terminate this
              Agreement. In any event, SUMMIT shall be relieved of its
              obligations hereunder until the Operating Agreement has been
              executed.

       9.2    The Operating Agreement shall include, among other things, the
              following provisions:

              (a)    ATLAS shall be the Operator of the License Area on behalf
                     of ATLAS and SUMMIT.

              (b)    ATLAS, as Operator of the License Area, shall delegate to
                     SUMMIT the authority under the Operating Agreement to
                     obtain or provide services and technical and operational
                     expertise necessary or appropriate for the conduct of
                     operations on the License Area, including without
                     limitation the recruitment of necessary experts and
                     technical personnel. The Patties will use good faith
                     efforts to employ Nigerian personnel and companies to the
                     extent the same are available and qualified, and the
                     Patties shall vigorously pursue transfer of technology
                     until the number of expatriate personnel is reduced to the
                     barest minimum in compliance with Nigerian law.

              (c)    The Parties shall enter into a mutually agreeable initial
                     work program in compliance with the terms of the OPL,
                     pursuant to which the Parties will conduct operations on
                     the License Area, including without limitation geological
                     and geophysical operations, seismic studies, drilling and
                     completion operations, seismic studies and any other
                     necessary or appropriate operations in connection with the
                     License Area.

              (d)    ATLAS and SUMMIT shall form a management committee (the
                     "Management Committee") which shall serve as the decision-
                     making body for the Parties. The Management Committee,
                     which shall consist of seven members, shall exercise
                     overall supervision and control of all

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                     matters pertaining to the License Area. Each Party shall
                     appoint three representatives to serve on the Management
                     Committee. In addition, until Payout, SUMMIT shall be
                     entitled to appoint one additional representative who must
                     be approved by ATLAS, and after Payout ATLAS will be
                     entitled to appoint such additional representative. The
                     representatives shall be authorized to attend, represent
                     and exercise the rights, powers and authorities of, and
                     bind the Patties with respect to any matter within the
                     authority or power of the Management Committee. Any member
                     of the Management Committee may delegate its voting
                     authority to any other member.

              (e)    The Management Committee shall, among other things, have
                     the authority to do the following:

                     (i)    approve plans for the exploration of the License
                            Area, the drilling and completion of wells thereon
                            and the production of Hydrocarbons therefrom; and

                     (ii)   approve a regularly prepared budget to govern
                            activities with respect to the License Area;
                            provided, however, that any such budget must be
                            unanimously approved by the Management Committee.

              (f)    The positions of Managing Director, Operations Manager,
                     Financial Director and Financial Controller shall be
                     established and their duties, authority and
                     responsibilities shall be fully described in the Operating
                     Agreement. The Managing Director and the Operations Manager
                     shall manage, administer and operate all day-to-day
                     business and affairs on the License Area. ATLAS shall be
                     entitled to appoint the Managing Director and SUMMIT shall
                     be entitled to appoint the Operations Manager.

              (g)    Prior to Payout, SUMMIT shall be entitled to appoint the
                     Financial Director and ATLAS shall be entitled to appoint
                     the Financial Controller. After Payout, such Financial
                     Director shall be appointed by ATLAS and the Financial
                     Controller shall be appointed by SUMMIT. The Financial
                     Director shall establish the primary banking relationship
                     for the Parties with a Swiss bank such as Union Bank of
                     Switzerland, or such other bank as the Financial Director
                     may from time to time select with the approval

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                     of the Management Committee. All transactions with respect
                     to the License Area shall be conducted in Dollars, except
                     to the extent otherwise required under the OPL.

              (h)    For the period during which both ATLAS and SUMMIT own an
                     interest in the License Area, (i) SUMMIT agrees that
                     neither it nor any of its Affiliates shall enter into the
                     Oil and Gas Business in the Federal Republic of Nigeria;
                     and (ii) ATLAS agrees that neither it nor any of its
                     Affiliates shall acquire any right or interest in the Oil
                     and Gas Business in the Federal Republic of Nigeria unless
                     ATLAS or its Affiliates first offer to SUMMIT the right to
                     acquire an undivided thirty percent (30%) of such right or
                     interest to be acquired by ATLAS in the Oil and Gas
                     Business. ATLAS shall promptly notify SUMMIT in writing of
                     each and every proposed acquisition and SUMMIT shall have
                     thirty (30) days after receipt of each notice within which
                     to elect to participate in the acquisition described in
                     such notice. For purposes hereof, "Oil and Gas Business"
                     means (i) the acquisition and ownership of any oil and gas
                     properties or interests of any kind whatsoever ("Oil and
                     Gas Interests"); (ii) the exploration, development or
                     operation of Oil and Gas Interests; (iii) the marketing,
                     gathering, compression, treating or processing of oil and
                     gas production; or (iv) the transportation of oil and gas
                     production.

       9.3    In the case of a conflict between the provisions of this
              Agreement and the Operating Agreement, except as otherwise
              specifically provided in the Operating Agreement, the provisions
              of this Agreement shall govern as between the Parties.

       9.4    To facilitate the orderly conduct of operations on the License
              Area under the OPL pending the execution of the Operating
              Agreement, the Parties shall establish an interim management
              committee (the "Interim Management Committee") upon execution of
              this Agreement which shall serve as the decision-making body for
              the Parties until execution of the Operating Agreement. The
              Interim Management Committee shall exercise overall supervision
              and control of all matters pertaining to the License Area. Each
              Party shall appoint one representative to serve on the Interim
              Management Committee. Each representative

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              shall be deemed authorized to attend, represent and exercise the
              rights, powers and authorities of, and bind that Party with
              respect to any matter within the authority or power of the Interim
              Management Committee.

       9.5    Either member of the Interim Management Committee may convene a
              meeting of the Interim Management Committee upon three (3) days'
              advance written notice. Proposals for activities on the License
              Area shall be in writing and shall, to be effective, be approved
              by all members of the Interim Management Committee.

       9.6    ATLAS shall obtain all necessary or appropriate licenses, permits
              or other official (or unofficial) clearances to permit the
              exploration and development of the License Area (OPL 75) and the
              marketing of Hydrocarbons therefrom, including without limitation
              (a) approvals from the MPMR and other necessary or appropriate
              governmental agencies to ensure that production from the License
              Area participates pro rata under any production or sales
              limitation imposed by OPEC or any like organization, and (b) an
              oil allocation contract for the benefit of the Parties, where
              possible.

ARTICLE 10

10.0 FORCE MAJEURE

       10.1   No Party hereto shall be liable for any failure to perform, or
              delay in performing, any of its obligations hereunder, other than
              its obligations to pay money, to the extent that such performance
              has been delayed, prevented or otherwise hindered by an event of
              "Force Majeure." For purposes hereof, the term "Force Majeure"
              shall include, but not limited to, hostilities, restraints of
              rulers or people, revolution, civil commotion, strike, labor
              disturbances, epidemic, accident, fire, lightning, f1ood, wind,
              storm, earthquake, explosion, blowout, crater, blockade or
              embargo, lack of or failure of transportation facilities or any
              law, proclamation, regulation or ordinance, demand or requirement
              of any government or any government agency having or claiming to
              have jurisdiction over the Parties hereto, or any act of God, or
              any other act of Government, act of omission of supplier or any
              other cause, whether of the same or different nature, existing or
              future, that is beyond the control and without the fault or
              negligence of the Party assessing benefit of this Article.


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       10.2   If Force Majeure causes a suspension of an obligation of any
              Party, that Party shall give notice as soon as reasonably possible
              to the other Party stating the date and extent of the suspension
              and the nature of the Force Majeure. Any Party whose obligation
              has been suspended shall take all reasonable steps to remove the
              Force Majeure situation and shall resume the performance of that
              obligation as soon as reasonably possible after the removal of the
              Force Majeure and shall so notify the other Party. Force Majeure
              as to one obligation is not, PER SE, Force Majeure as to any other
              obligations.

       10.3   The settlement of strikes and lockouts shall be entirely within
              the discretion of the affected Party, and the requirement that
              Force Majeure shall be remedied with all reasonable dispatch,
              shall not require the settlement of strikes or lockouts by
              acceding to the demands of the opposing party when such a course
              is deemed inadvisable in the discretion of the affected Party.

ARTICLE 11

11.0 ASSIGNMENT

       11.1   Neither Party may assign, transfer or otherwise dispose of all
              its rights or obligations hereunder, except to an Affiliate,
              without the prior written consent of the other Party. Any assignee
              or successor shall be bound by the terms of this Agreement, and
              any assignment shall be subject to any required approvals by the
              MPMR. In the event a Party makes an assignment to an Affiliate,
              the Party shall promptly notify the other Party of such
              assignment.

       11.2   At any time after the earlier to occur of (a) the date which is
              ninety (90) days after completion or abandonment of three (3)
              wells drilled on the License Area, and (b) December 31, 1993,
              SUMMIT shall have the option to withdraw from this Agreement and
              reassign its Participating Interest to ATLAS (or its designee) and
              thereafter SUMMIT shall have no further rights or obligations
              hereunder; provided, however, that SUMMIT shall be entitled to
              continue to receive its Participating Interest share of revenues
              attributable to the sale of Hydrocarbons from wells drilled on the
              License Area prior to the date of its election to reassign.

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       11.3   In the event that SUMMIT elects to reassign its Participating
              Interest to ATLAS(or its designee) pursuant to Article 11.2 above,
              ATLAS hereby agrees to accept such reassignment and to protect,
              indemnify and hold SUMMIT harmless from and against any and all
              costs, expenses and liabilities arising after the date of SUMMIT's
              election to reassign in connection with the License Area, whether
              under the OPL, any Oil Mining Lease resulting therefrom, this
              Agreement, the Operating Agreement, or otherwise. SUMMIT hereby
              agrees to protect, indemnify and hold ATLAS harmless from and
              against any and all costs and expenses arising from obligations
              contracted for by SUMMIT prior to the date of SUMMIT's election to
              reassign.

ARTICLE 12

12.0 GOVERNING LAW, ARBITRATION AND LIABILITIES

       12.1   This Agreement shall be governed by and construed in accordance
              with the laws of the Federal Republic of Nigeria, except such
              provisions hereof which would require the application of the laws
              of another jurisdiction. For purposes of enforcing any arbitration
              award rendered pursuant to the provisions of Article 12.2 below,
              (a) SUMMIT hereby appoints the Secretary of State of the State of
              Texas in Austin, Texas, as its agent for service of process and
              hereby waives any claim of lack of jurisdiction of the courts of
              Texas over SUMMIT or any award, and agrees that any such award
              shall be enforceable in Texas; and (b) ATLAS hereby appoints the
              Attorney General of the Federal Republic of Nigeria as its
              agent for service of process and hereby waives any claim of lack
              of jurisdiction of the courts of the Federal Republic of Nigeria
              over ATLAS or any such award, and agrees that any such award shall
              be enforceable in the Federal Republic of Nigeria.

       12.2   Any dispute arising out of or relating to this Agreement,
              including any question regarding its existence, validity or
              termination, shall be settled before an arbitration committee
              composed of two arbitrators, one to be appointed by ATLAS and one
              to be appointed by SUMMIT, in accordance with the Rules of
              Reconciliation and Arbitration of the International Chamber of
              Commerce, and judgment upon the award rendered by the arbitrators
              may be entered in any court having jurisdiction thereof. The place
              of

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              arbitration shall be Geneva, Switzerland, and all proceedings
              shall be conducted in the English language. A dispute shall be
              deemed to have arisen when any Party gives notice to the other
              Party to that effect.

       12.3   Notwithstanding any other provisions of this Agreement, in no
              event shall any Party be liable to the other Party for loss of
              prospective profits, or special, indirect or consequential
              damages, in connection with this Agreement or with respect to any
              operations related thereto.

       12.4   Subject to the other provisions of this Agreement, the OPL, any
              Oil Mining Lease resulting therefrom, the Operating Agreement, the
              Participating Interests of the Parties shall be owned and held
              severally and not jointly or collectively, in undivided interests,
              and each Party waives for itself, and for and on behalf of its
              successors and assigns, all rights of partition.

       12.5   Each Party is solely and individually responsible for any and all
              taxes which may become due with respect to that Party's earnings
              or income resulting from the operations contemplated under this
              Agreement, as well as from any other source (including its own
              depreciation and amortization policy); provided that each Party
              shall indemnify, defend and hold harmless each other Party from
              and against any loss, cost or liability arising from that Party's
              obligations.

       12.6   The obligations and liabilities of the Parties are several and
              not joint.

       12.7   It is the intention of the Parties that this Agreement shall not
              be regarded as a partnership, and the Parties agree that the
              Agreement shall not be construed to create the relationship
              between the Parties of a tax partnership. Each Party acknowledges
              that there is no obligation to jointly compute or report any item
              of income, gain, loss, credit or deduction. All items of income,
              gain, loss, credit or deduction derived by each Party under the
              Agreement may and shall be separately determined for their
              separate accounts without the requirement or necessity for
              computing partnership income or loss. Each Party elects exclusion
              from the application of all of the provisions of Subchapter K,
              Chapter 1, Subtitle A of the United States Internal Revenue Code
              of 1986, as amended (the "Code"). SUMMIT is authorized, after due
              consultation with ATLAS, to execute and file on behalf of each
              Party the elections, statements and related documents with
              appropriate officers of the United States Internal Revenue Service
              which may be

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              necessary and desirable under the provisions of Section 761 of
              the Code and the regulations thereunder to perfect exclusion from
              the provisions of Subchapter K.

ARTICLE 13

13.0 NOTICES

       13.1   Any notice to be given hereunder shall be in writing and may be
              delivered by hand, sent by certified or registered mail or
              transmitted by cable or facsimile to the relevant address get
              forth below, or such other address as may be communicated by the
              relevant Party to the other Party from time to time. Any notice,
              communication or delivery hereunder shall  be deemed to have been
              duly made when personally delivered to, or when a cable or
              facsimile bas been received at, the address indicated below; or if
              mailed, when received by the Party charged with such notice at the
              address indicated below.

       13.2   The relevant addresses for all notices shall be as follows:

              If to ATLAS :

              Atlas Petroleum International Limited
              No. IB Ibiyinka Olorunibe Close
               Off Ahmodu Ojikuta Street
              Victoria Island
              Lagos
              Nigeria
              Attention: Alhaji Ndanusa
              Telephone No.: (234)(1)615296
              Facsimile No.: (234)(1)615689

              If to SUMMIT:
              Summit Partners Management Co.
              2200 Ross Avenue, Suite 4300E, LB170
              Dallas, Texas 75201 U.S.A.
              Attention: Don V. Ingram
              Telephone No.: (214) 220-4300
              Facsimile No.: (214) 220-4349

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ARTICLE 14

14.0 CONFIDENTIALITY

       14.1   Upon execution of this Agreement, SUMMIT shall be entitled to all
              data and information developed with respect to the OPL or the
              License Area. In this regard, ATLAS shall make available to
              SUMMIT: (a) copies of all decrees, permits, licenses, contracts,
              agreements and any other documents relating to the OPL or the
              License Area, including any English translations of the same: (b)
              all geological and geophysical data, maps, models, interpretations
              and other technical data relating to the OPL or the License Area;
              and any work programs and/or budgets relating to the OPL or the
              License Area which have been submitted to the Government, together
              any and all correspondence or other communications with Government
              regarding the same.

       14.2   The Parties agree to keep the terms of this Agreement,
              commercial, contractual and financial information with respect to
              or pertaining to the OPL or the License Area, as well as all data
              and information referred to in Article 14.1 (hereinafter referred
              to as the "Information"), strictly confidential and shall not
              disclose the information to any third party other than an
              Affiliate, or its attorneys, or agencies delegated by the Federal
              Republic of Nigeria, without the prior written consent of the
              other Party and, when the OPL or applicable Nigerian laws so
              requires, the Government.

       14.3   The obligation of confidentiality in Article 14.2 shall not apply
              to:

              (a)    Information which becomes available to any Party or its
                     respective Affiliates from a third party as a matter of
                     right without restriction of disclosure;

              (b)    Information which is, or which becomes, part of the public
                     domain; and

              (c)    Information requested by governmental, judicial or
                     financial authorities under the laws, rules or regulations
                     of the United States of America or the Federal Republic of
                     Nigeria.

       14.4   Nothing in Article 14.2 shall prevent a Party from disclosing
              Information to:

              (a)    Employees, Affiliates, consultants, contractors and
                     sub-contractors to the extent required for the efficient
                     conduct of operations on the License Area, provided such
                     Information is disclosed on terms which provide for the
                     Information to be treated as confidential by the recipient
                     and, in the

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                     case of disclosures to consultants, contractors and
                     sub-contractors, the Party making disclosure obtains
                     form such individuals or entities prior to making
                     disclosure a written confidentiality undertaking no less
                     restrictive than the obligation of the disclosing Party
                     under Article 14.1;

              (b)    Any bank or financial institution from which a Party may
                     seek financing, after receiving from it a confidentiality
                     agreement; and

              (c)    Any recognized stock exchange upon whicl1 the shares of the
                     disclosing Party, or an Affiliate, are listed, provided
                     that the Party is required to reveal such Information by
                     applicable Jaw or regulation, and to shareholders to the
                     extent a Party must disclose Information in an annual or
                     periodic report.

ARTICLE 15

15.0 MISCELLANEOUS

       15.1   The captions and headings for the Articles of this Agreement are
              made for convenience only and shall not be interpreted or
              construed so as to limit or in any way or change the substantive
              provisions of any part of this Agreement.

       15.2   None of the rights, requirements or provisions of this Agreement
              shall be deemed to have been waived by any Party by reason of such
              Party's failure to enforce any right or remedy granted it
              hereunder or to take advantage of any default, and each Party
              shall at all times hereunder have the right to require the strict
              compliance of the other Parties to the provisions of this
              Agreement.

       15.3   Except as otherwise provided herein, this Agreement constitutes
              the entire understanding of the Parties with respect to the
              subject matter hereof and supersedes all prior negotiations and
              agreements, whether oral or written, of the Parties.

       15.4   The Parties acknowledge that SUMMIT is subject to the laws of the
              United States of America and the Parties agree to use their best
              efforts to ensure that no actions under this Agreement or the
              Operating Agreement shall be taken or permittes which are in
              contravention of such laws.

       15.5   Each Party shall do all such further acts and execute and deliver
              all such further documents, as shall be reasonably required, in
              order to fully perform and carry out this Agreement.

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       15.6   This Agreement shall inure to the benefit of, shall bind, and
              shall be enforceable by and against each Party and its respective
              successors and assigns.

       15.7   Each of the Parties represents and warrants to the other that it
              has not made any arrangement or in any way incurred any liability
              for a finder's fee or any other remuneration to a broker, finder
              or agent whereby the other Party hereto might become liable for
              any such fee or other remuneration, and if any such fee or any
              remuneration becomes payable by any Party hereto as a result of
              any arrangements made by the other Party, the Party which has made
              such arrangement agrees to protect, defend, indemnify and hold
              hann1ess the other Party hereto to the full extent of such
              liability.

IN WITNESS WHEREOF, the duly authorized representatives of the Parties hereto
have executed this Agreement in triplicate originals on the day, month and year
first written above.


SUMMIT PARTNERS MANAGEMENT CO.

By: Don V. Ingram, President              By: Scott C. Larsen, Senior Vice
                                              President


ATLAS PETROLEUM INTERNATIONAL LIMITED

By: Prince Arthur Eze, Chairman           By: Alhaji Ndanusa, Vice Chairman

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Exhibit "A"

[copy of letter dated March 27, 1991 from the Nigerian Minister of Petroleum
Resources to The Group Chairman, Atlas Petroleum Int. Ltd. Re : Grant of Oil
Prospecting License:  Authorization to Commence Operation in OPL 75]





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EXHIBIT "B" ASSIGNMENT

FOR GOOD AND VALUABLE CONSIDERATION, ATLAS PETROLEUM INTERNATIONAL LIMITED,
being a corporation organized and existing under the laws of the Federal
Republic of Nigeria ("ATLAS"), hereby assigns to SUMMIT PARTNERS MANAGEMENT
CO., a corporation organized and existing under the laws of the State of
Texas ("SUMMIT"), an undivided thirty percent (30% ) interest in and to the
rights, privileges, benefits, duties, burdens and obligations in and under
Oil Prospecting License 75, dated March 27, 1991, hereinafter the "OPL ".
After Government approval of this Assignment, the parties to the OPL and
their interests shall be as follows:



COMPANY                     PARTICIPATING INTEREST
- -------                     ----------------------
                         
SUMMIT                             30%

ATLAS                              70%


This Assignment shall become effective as of the date signed, subject to the
written consent and approval of the Minister of Petroleum and Mineral
Resources.

IN WITNESS WHEREOF, the parties have executed this Assignment on this 17th
day of July, 1992, but effective as of the date set forth above.

SUMMIT PARTNERS MANAGEMENT CO.

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

Don V. Ingram, President                   Scott C. Larsen, Senior Vice
                                           President

ATLAS PETROLEUM INTERNATIONAL LIMITED

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

Prince Arthur Eze, Chairman                  Alhaji Ndanusa, Vice Chairman

APPROVED on this            day of                      1992.

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

Title:
   ----------------------------



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