FUNDING AGREEMENT FOR TIER I DEVELOPMENT PROJECT




                                         AMONG




                           HONDO MAGDALENA OIL & GAS LIMITED




                                OPON DEVELOPMENT COMPANY




                                          AND





                            AMOCO COLOMBIA PETROLEUM COMPANY





                                      May 5, 1995

















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                    FUNDING AGREEMENT FOR TIER I DEVELOPMENT PROJECT

        This Agreement made as of the 5th day of May, 1995 among Amoco Colombia
        Petroleum Company (hereinafter referred to as "AMOCO"), a company
        incorporated in Delaware, U.S.A., having offices at 200 Randolph Drive,
        Chicago, Illinois 60601; Hondo Magdalena Oil & Gas Limited, (hereinafter
        called "HONDO"), a company duly organized and existing under the laws of
        the Island of Jersey, Channel Islands, having its principal office at
        410 East College Boulevard, Roswell, New Mexico 88201, U.S.A.; and Opon
        Development Company, (hereinafter called "ODC"), a partnership duly
        formed and existing under the laws of the State of Colorado, U.S.A.,
        having its principal offices at 1675 Broadway, Suite 1050, Denver,
        Colorado 80202, hereinafter called a Party or the Parties. 

                                       WITNESSETH

        A.   WHEREAS, as of this date, AMOCO holds a sixty percent (60%)
             undivided participating interest, ODC holds a ten percent (10%)
             undivided participating interest, and HONDO holds a thirty percent
             (30%) undivided participating interest in the Opon Association
             Contract with Empresa Colombiana de Petroleos ("Ecopetrol"), in the
             Republic of Colombia ("the Opon Association Contract"). 

        B.   WHEREAS, AMOCO, HONDO and ODC have entered into appropriate Farmout
             and Operating Agreements dated August 9, 1993 providing for their
             respective right and obligations to conduct operations under the
             Opon Association Contract. 

        C.   WHEREAS, HONDO, ODC and AMOCO have discussed the possibility of
             Amoco providing assistance with funding HONDO's and ODC's
             proportionate share of the proposed Budget for the expenditures
             necessary to complete the Tier I Development Project as defined
             herein and AMOCO is prepared to extend financing to ODC and HONDO
             subject to the terms and conditions established in this Agreement. 

        NOW THEREFORE, in consideration of the mutual promises contained herein
        the Parties agree as follows: 

        1.   AMOCO will pay HONDO's and ODC's proportionate share of
             expenditures incurred for the proposed seismic programs, pipeline,
             treating facilities, buildings and other construction expenditures
             associated with the Tier I Development Project and operating
             expenses including overhead, during the period of October 1, 1994
             to the date one year after the date of first production and sales
             through the pipeline ("First Production") from the Opon Field as
             provided herein. The Tier I Development Project are those works and
             related expenditures defined in Exhibit A attached hereto. 

        2.   During the period up to the date of First Production, HONDO and ODC
             will have the option to reimburse AMOCO for all spending described
             in Paragraph 1 above, made on their behalf for the Tier I
             Development Project (including their share of any expenditures made
             by AMOCO on behalf of Ecopetrol's interest in the Tier I
             Development Project) plus an equity premium equivalent to one and

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             sixty-seven one-hundredths percent (1.67%) interest compounded
             monthly (twenty-two percent (22%) annualized interest) before tax
             on all such expenditures incurred through the date of reimbursement
             to AMOCO from the time funds are disbursed on HONDO and ODC's
             behalf. If HONDO and ODC reimburse AMOCO during the period up to
             the date of First Production, HONDO and ODC shall pay AMOCO any
             equity premiums to which AMOCO is entitled and any sums advanced by
             AMOCO pursuant to this Agreement in cash. After Amoco has been
             reimbursed according to the terms of this paragraph, Hondo and ODC
             will assume full responsibility for funding their shares of all
             future Tier I Development Project expenses under the terms of the
             Joint Operating Agreement among AMOCO, HONDO and ODC dated August
             9, 1993. 

        3.   During the period from the date of First Production through the
             365th day after the date of First Production, HONDO and ODC will
             have the option to reimburse AMOCO for all spending, described in
             Paragraph 1 above, made on their behalf for the Tier I Development
             Project (including their share of any expenditures made by AMOCO on
             behalf of Ecopetrol's interest in the Tier I Development Project)
             plus an equity premium  equivalent to one and sixty-seven
             one-hundredths percent (1.67%) interest compounded monthly
             (twenty-two percent (22%) annualized interest) before tax on all
             such expenditures incurred through the date of reimbursement to
             AMOCO from the time funds are disbursed on HONDO's and ODC's
             behalf. If HONDO and ODC reimburse AMOCO during the period after
             the date of First Production through the 365th day after the date
             of First Production, HONDO and ODC shall pay AMOCO any equity
             premiums to which AMOCO is entitled and/or any sums advanced by
             AMOCO pursuant to this Agreement in cash. Any outstanding balance
             of sums advanced by AMOCO and premium due to AMOCO shall be reduced
             by, and until any outstanding balance has been reimbursed AMOCO
             shall be entitled to, (i) HONDO's and ODC's share of production
             revenues from sales of the first 80 mmcfd natural gas and
             corresponding condensate and natural gas liquids from the Opon
             Structure as defined in Exhibit D, (ii) HONDO's and ODC's share of
             all tariff revenues pertaining to that first 80 mmcfgd received by
             AMOCO as Operator of the Opon Association Contract Area from
             transporters of gas through the Tier I Development Project
             pipeline, and (iii) HONDO's and ODC's share of Ecopetrol's
             reimbursement pertaining to the Tier I Development Project, as
             revenues are received. After Amoco has been reimbursed according to
             the terms of this paragraph, Hondo and ODC will assume full
             responsibility for funding their shares of all future Tier I
             Development Project expenses under the terms of the Joint Operating
             Agreement among AMOCO, HONDO and ODC dated August 9, 1993 and
             revisions to that Operating Agreement. 

        4.   From the date of First Production through the 90th day of
             production, HONDO and ODC will have the option to reimburse AMOCO
             for all spending, described in Paragraph 1 above, made on their
             behalf for the Tier I Development Project (excluding their share of
             any expenditures made by AMOCO on behalf of Ecopetrol's interest in
             the Tier I Development Project) plus an equity premium equivalent
             to twenty-five percent (25%) of all such expenditures incurred

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             through the date of reimbursement to AMOCO. If HONDO and ODC
             reimburse AMOCO during the period from the date of First Production
             through the 90th day of production, HONDO and ODC shall pay AMOCO
             any equity premiums to which AMOCO is entitled and any sums
             advanced by AMOCO pursuant to this Agreement in cash. The sum of
             all expenditures made by AMOCO on behalf of HONDO and ODC and
             premium due to AMOCO shall be reduced by, and until any outstanding
             balance has been reimbursed AMOCO shall be entitled to, (i) HONDO's
             and ODC's share of production revenues from sales of the first 80
             mmcfd natural gas and corresponding condensate and natural gas
             liquids from the Opon Structure as defined in Exhibit D, (ii)
             HONDO's and ODC's share of all tariff revenues pertaining to the
             first 80 mmcfgd received by AMOCO as Operator of the Opon
             Association Contract Area from transporters of gas through the Tier
             I Development Project pipeline as of the date of reimbursement, and
             (iii) HONDO's and ODC's share of Ecopetrol's reimbursement
             pertaining to the Tier I Development Project. After Amoco has been
             reimbursed according to the terms of this paragraph, Hondo and ODC
             will assume full responsibility for funding their shares of all
             future Tier I Development Project expenses under the terms of the
             Joint Operating Agreement among AMOCO, HONDO and ODC dated August
             9, 1993. 

        5.   If after 365 days past the date of First Production HONDO and ODC
             have not reimbursed AMOCO for all Tier I Development Project
             expenditures plus any equity premium as stated above, HONDO and ODC
             will reimburse AMOCO as follows. The total expenditures made on
             behalf of HONDO and ODC (including their share of any expenditures
             made by AMOCO on behalf of Ecopetrol's interest in the Tier I
             Development Project) shall be computed on the date of First
             Production. The balance referred to in this paragraph shall be
             increased after the date of First Production by (a) any additional
             expenditures on behalf of HONDO and ODC to the extent such
             expenditures exceed revenues during the month of expenditure, and
             (b) an equity premium equivalent to one and sixty-seven
             one-hundredths percent (1.67%) interest compounded monthly
             (twenty-two percent (22%) annualized interest) before tax from the
             time funds are disbursed. Such balance shall be similarly decreased
             by (a) any revenues (including any tariffs or reimbursements from
             Ecopetrol) before tax net of royalties and expenditures
             attributable to HONDO's and ODC's interest, in the first 80 mmcfd
             natural gas and corresponding condensate and natural gas liquids
             produced from the Opon Structure defined in Exhibit D, and (b) any
             partial payments made by HONDO and ODC. Such increases and
             decreases shall be applied to such balance as they occur. On the
             366th day after the date of First Production such balance shall
             then be subject to a 100% equity premium. Until such balance plus a
             100% equity premium has been reimbursed to AMOCO on an after-tax
             basis as defined in Paragraph 6, AMOCO shall be entitled to HONDO's
             and ODC's share of production revenues from sales of the first 80
             mmcfd natural gas and corresponding condensate and natural gas
             liquids from the Opon Structure defined on Exhibit D, HONDO's and
             ODC's share of all tariff revenues received by Amoco as operator of
             the Opon Association Contract Area from transporters of gas through
             the Tier I Development Project pipeline attributable to the above

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             mentioned first 80 mmcfgd, and HONDO's and ODC's share of Ecopetrol
             reimbursements to the Association. 

        6.   The after-tax payback of expenditures and premium described in the
             above Paragraph 5 will be calculated using only production revenue,
             transportation tariffs, and expenditures associated with the first
             tranche of 80 mmcfd gross gas sales from the Opon Structure as
             defined in Exhibit D. Such after-tax payback shall be calculated by
             applying Colombian taxes to AMOCO's Colombian taxable income under
             Colombian law that would result from a calculation using only
             HONDO's and ODC's proportionate share of the revenue from
             production and transportation tariffs associated with the first
             tranche of 80 mmcfd gross gas sales from the Opon Structure as
             defined in Exhibit D and the expenditures made on the behalf of
             HONDO and ODC. In the event such revenues are available, HONDO and
             ODC have the option to apply revenues associated with production in
             excess of the first tranche of 80 mmcfd gross gas sales to the
             payback of the Tier I Development Project in the same manner as
             above. 
                                            
        7.   AMOCO's funding of ODC's and HONDO's proportionate share of
             expenditures as provided herein, shall be secured by HONDO's and
             ODC's respective share of the first 80 mmcfd natural gas and
             corresponding condensate and natural gas liquids production from
             the Opon Structure as defined in Exhibit D.

        8.   HONDO and ODC hereby cast their affirmative vote under the Opon
             Association Contract and that certain Operating Agreement among
             AMOCO, HONDO and ODC dated August 9, 1993, to declare commerciality
             of the field once the Opon #4 Well has been drilled and tested. The
             Parties shall meet to mutually agree on an acceptable development
             program to be presented to Ecopetrol.    

        9.   The Parties agree and hereby incorporate the following change to
             the Joint Operating Agreement among HONDO, ODC and AMOCO:

             (a)  The provisions contained in Article 14.2 of the Joint
                  Operating Agreement and Clause 14(m) of the Farmout Agreement
                  among the Parties are deleted hereby. For United States
                  Federal Income Tax purposes, this Agreement and the operations
                  under this Agreement, the Farmout and Joint Operating
                  Agreements are regarded as a partnership, the parties hereby
                  elect to be included in the application of all of the
                  provisions of Sub-Chapter K, Chapter 1, Sub-Title A of the
                  United States Internal Revenue Code of 1986, as amended. 
                  AMOCO as Operator is authorized and directed to execute for
                  each Party such evidence of this election as may be required
                  by the Internal Revenue Service.  No party shall give any
                  notice or take any other action inconsistent with the election
                  made hereby. The tax partnership created pursuant to this
                  Agreement shall be regulated pursuant to terms and conditions
                  established by a Tax Partnership Agreement that the Parties
                  shall promptly negotiate in good faith, and attach to this
                  Agreement as Exhibit C.


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             (b)  Except for the foregoing modification contained herein, the
                  remaining provision of the Farmout and Joint Operating
                  Agreements among AMOCO, HONDO and ODC shall remain in full
                  force and effect.

             (c)  Also, since the Parties desire to introduce some additional
                  changes to the Joint Operating Agreement among AMOCO, HONDO
                  and ODC, the parties shall meet as soon as possible to
                  negotiate in good faith such changes.

        10.  The Parties shall immediately negotiate and enter into a mutually
             acceptable Lifting Agreement to produce and sell the hydrocarbons
             (including natural gas liquids and condensate) produced from the
             field under the Opon Association Contract. However, until the time
             when the Parties execute such Lifting Agreement, AMOCO shall have
             the right to lift and sell, domestically or internationally,
             HONDO's and ODC's share of hydrocarbons including natural gas
             liquids and condensate produced from the Opon Field, at El Centro
             Gas Processing Plant and/or other facilities and account therefor.
             Thereafter, the Parties shall comply with the provisions of such
             Lifting Agreement. 

        11.  The Parties shall be reimbursed by Ecopetrol pursuant to the terms
             of the Association Contract, first for the Parties' costs,
             expenditures and overhead for the Tier I Development Project as
             established in this Agreement. 

        12.  HONDO and ODC hereby cast their affirmative vote to AMOCO's
             proposed Budget for the expenditures necessary to complete the Tier
             I Development Project which is attached herein as Exhibit B to this
             Agreement. 

        13.  Each of the Parties may separately exercise the alternative options
             described in Paragraphs 2, 3 and 4, without reference to the
             actions taken by the other Parties. The obligations of the Parties
             are several and not joint. 

        14.  The choice of law and dispute resolution provisions of the Farmout
             and Joint Operating Agreement among HONDO, ODC and AMOCO shall
             apply to this Agreement and as applicable the remaining provisions
             of such Agreements.

        15.  This Agreement is contingent upon the Parties executing a
             Memorandum of Understanding with Ecopetrol to proceed with the
             construction of the pipeline from the Opon Field to Ecopetrol's
             refinery in Barrancabermeja, Colombia and the corresponding gas
             processing facilities which are part of the Tier I Development
             Project as described herein. Therefore, this  Agreement shall
             become effective on the date the Parties execute such Memorandum of
             Understanding with Ecopetrol.

        16.  AMOCO, HONDO and ODC each, respectively, as to its own interests
             represent and warrant to the others that they have the power and
             authority to enter into and perform the obligations undertaken by
             them under this Agreement and their doing so will not violate, nor

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             constitute a default or breach under, any law, contract, loan
             arrangement, corporate authority or restriction applicable to each
             of them or to which each of them is a party and the persons
             executing this Agreement on their behalf are legally authorized to
             do so. 

        17.  Payments in kind and production revenue reimbursements as
             contemplated herein shall follow the principals of the Joint
             Operating Agreement. Any reimbursement in currency under this
             Agreement shall be made in U.S. Dollars. 

        18.  AMOCO will provide to HONDO and ODC monthly statements showing
             disbursements made and equity premium accrued for the Tier I
             Development Program. 

        19.  Where revenues are used to reduce any outstanding balance pursuant
             to this Agreement, it is the intent of the Parties to deduct excise
             taxes actually paid before reducing such outstanding balance. 






































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        THIS AGREEMENT may be executed in counterparts each of which when
        executed and delivered shall be an original but all of which together
        shall constitute one and the same instrument. 

        IN WITNESS WHEREOF, this Agreement has been executed by the duly
        authorized representatives of the Parties as of the day of and year
        first above written. 

        HONDO MAGDALENA OIL & GAS LIMITED

        By:     /s/ C.B. McDaniel            
             ---------------------------------
                C. B. McDanlel

        Title: General Counsel and Assistant Secretary

        Date:   May 5, 1995
             ---------------------------------

        AMOCO COLOMBIA PETROLEUM COMPANY

        By:     /s/ T.W. Melson
             ---------------------------------  

        Title:  Attorney In Fact 
             ---------------------------------

        Date:   May 5, 1995
             ---------------------------------


        OPON DEVELOPMENT COMPANY

        BY:    /s/ Douglas K. Childs 
             ---------------------------------

        Title: President of Childs Petroleum Corporation, 
               General Partner Chase Petroleum Ltd., General 
               Partner of Chase Opon Ltd., Managing General 
               Partner of Opon Development Company. 

        Date:  May 5, 1995
             ---------------------------------













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                                       EXHIBIT A
                               TIER I DEVELOPMENT PROJECT

        The Tier I Development comprises all expenditures related to the
        construction and operation of facilities required to make gas sales into
        the local Colombian gas market. These facilities include field flowlines
        and production treating facilities, a pipeline to Barrancabermeja,
        upgrade of gas processing facilities at Ecopetrol's El Centro plant, and
        construction of a permanent warehouse and personnel housing at the field
        location. All expenditures for geological and geophysical work,
        including 2D and 3D seismic surveys, are also included in the Tier I
        Development Project. The Tier I Development Project includes: 

        Flowlines and pipeline to Barrancabermeja (16" pipeline via El Centro) 

        El Centro processing equipment and storage upgrades 

        Opon Field treating facilities 

        Geological and geophysical work programs 

        Other construction, including field warehouse and housing 

        Operating expenses, including overhead 
































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