Document:

<PAGE>   1
                                                                   Exhibit 10.15

                              EMPLOYMENT AGREEMENT

This Agreement entered into as of the 31st day of January, 2000 (the "Effective
Date"), by and between Remington Oil and Gas Corporation (the "Company") and
James A. Watt (the "Executive").

WHEREAS, the Company desires to employ the Executive and the Executive desires
to be employed by the Company in the capacities and for the term and
compensation and subject to the terms and conditions hereinafter set forth, and

WHEREAS, the Board of Directors of the Company (the "Board") has determined that
it is essential and in the best interest of the Company and its stockholders to
retain the services of the Executive especially in the event of a threat or
occurrence of a Change of Control and to ensure his continued dedication and
efforts in such event without undue concern for his personal financial and
employment security; and

WHEREAS, in order to induce the Executive to remain in the employ of the Company
particularly in the event of a threat or an occurrence of a Change in Control,
the Company desires to enter into this Agreement with the Executive to provide
the Executive with certain benefits during the term of his employment before and
after a Change of Control and to provide the Executive with the Gross-Up Payment
(as hereinafter defined).

NOW, THEREFORE, in consideration of the respective agreements of the parties
contained herein, it is agreed as follows:

1.   TERM OF AGREEMENT. The Employment Term shall commence on the Effective Date
     and shall expire on the third anniversary of the Effective Date; provided,
     however, that on each anniversary of the Effective Date, the Employment
     Term shall be extended an additional one (1) year from such anniversary at
     the mutual written agreement of the Company and the Executive.

2.   EMPLOYMENT.

2.1  Subject to the provisions of Section 4 hereof, the Company agrees to
     continue to employ the Executive and the Executive agrees to remain in the
     employ of the Company during the Employment Term. During the Employment
     Term, the Executive shall be employed as the President and Chief Executive
     Officer of the Company or in such other senior executive capacity as may be
     mutually agreed to in writing by the parties. The Executive shall perform
     the duties, undertake the responsibilities and exercise the authority
     customarily performed, undertaken and exercised by persons situated in a
     similar executive capacity. He shall also promote, by entertainment or
     otherwise, the business of the Company.

2.2  During the Employment Term, excluding periods of vacation and sick leave to
     which the Executive is entitled, the Executive agrees to devote reasonable
     attention and time during normal business hours to the business and affairs
     of the Company to the extent necessary to discharge the responsibilities
     assigned to the Executive hereunder. The Executive may (1) serve on
     corporate, civil or charitable boards or committees, (2) manage personal
     investments, and (3) deliver lectures and teach at educational institutions
     or events so long as such activities do not significantly interfere with
     the performance of the Executive's duties hereunder. It is expressly
     understood and agreed that to the extent that any such activities have been
     conducted by the Executive prior to the Effective Date, the continued
     conduct of such activities (or the conduct of activities similar in nature
     and scope thereto) subsequent to the Effective Date shall not thereafter be
     deemed to interfere with the performance of the Executive's
     responsibilities to the Company.

3.   COMPENSATION

3.1  Base Salary. During the Employment Term, the Company agrees to pay or cause
     to be paid to the Executive an annual base salary of $270,000, and as may
     be increased from time to time at the discretion of the Board or its

<PAGE>   2

     designee, the Compensation Committee of the Board (the "Compensation
     Committee"), (hereinafter referred to as the "Base Salary"). Such Base
     Salary shall be payable in accordance with the Company's customary
     practices applicable to its executives.

3.2  Bonus. In addition to the Base Salary, the Executive shall be eligible to
     receive an annual performance bonus (the "Bonus"). The amount of the Bonus
     shall be targeted at 50% of the Base Salary, provided, however, that the
     amount of the Bonus may be increased or decreased at the discretion of the
     Board or the Compensation Committee following consultation with the
     Executive. Each Bonus shall be paid no later than the end of the third
     month of the fiscal year next following the fiscal year for which the Bonus
     is awarded, unless the Executive shall elect to defer the receipt of such
     Bonus.

3.3  Benefits. During the Employment Term, the Executive shall be entitled to
     participate in all employee, executive or key-employee benefit or incentive
     compensation plans maintained or established by the Company for the purpose
     of providing compensation and/or benefits to employees, executives or key
     employees, generally, including without limitation, all pension,
     retirement, profit sharing, savings, stock option, deferred compensation,
     restricted stock grants, medical, hospitalization, dental, life or travel
     accident insurance plans. Unless otherwise provided herein, the
     compensation and benefits hereunder, and the Executive's participation in
     such plans, practices and programs shall be on the same basis and terms as
     applicable to the other eligible participants in the particular plan,
     practice or program. No additional compensation provided under any such
     plans shall be deemed to modify or otherwise affect the terms of this
     Agreement or any of the Executive's entitlements hereunder.

3.4  Vacation and Sick Leave. During the Employment Term, at such reasonable
     times as the Board shall in its discretion permit, the Executive shall be
     entitled, without loss of pay, to absent himself voluntarily from the
     performance of his employment under this Agreement, provided that: (1) the
     Executive shall be entitled to four (4) weeks of annual paid vacation; such
     vacation to be taken in accordance with the policies of the Company in
     regard to vacation, and (2) the Executive shall be entitled to sick leave
     (without loss of pay) in accordance with the Company's policies in effect
     from time to time.

3.5  Fringe Benefits, Perquisites and Expenses. During the Employment Term, the
     Executive shall be entitled to all fringe benefits and perquisites
     generally made available by the Company to its executives; provided,
     however, even if not provided to all executives by the Company, the Company
     shall provide the Executive with a membership in a luncheon or petroleum
     club, memberships in appropriate professional associations, and an
     automobile allowance in an amount deemed appropriate by the Board or the
     Compensation Committee. The Executive shall be entitled to receive prompt
     reimbursement of all expenses reasonably incurred by him in connection with
     the performance of his duties hereunder or for promoting, pursuing or
     otherwise furthering the business or interest of the Company.

4.   TERMINATION

4.1  During the Employment Term, the Executive's employment hereunder may be
     terminated under the following circumstances:

(1)  Cause. The Company may terminate the Executive's employment for "Cause" by
     written notice to the Executive ("Notice of Termination"), which
     termination shall be effective upon the date of sending of such notice (the
     "Termination Date"), if the Executive, as determined by at least two-thirds
     (2/3rds) of the Board, not including the Executive who will not be entitled
     to vote on the issue in the event he is a member of the Board, (a) shall
     have been convicted of a felony or entered a plea of nolo contendre to a
     felony charge, (b) shall have been involved in any act of material fraud,
     theft, or other material misconduct detrimental to the best interests of
     the Company, (c) shall have engaged in gross negligence or willful
     misconduct with respect to his duties to the Company and as a result caused
     material harm to the Company, (d) shall have engaged in competitive
     behavior against the Company, misappropriated or aided in misappropriating
     a material opportunity of the Company, secured or attempted to secure a
     personal benefit not fully disclosed to and approved by a majority

<PAGE>   3

     of the Board in connection with any transaction of or on behalf of the
     Company, or (e) shall have failed to substantially perform his duties as
     set forth herein.

(2)  Disability. The Company may terminate the Executive's employment after
     having established the Executive's disability. For purposes of this
     Agreement, "Disability" means a physical or mental infirmity which impairs
     the Executive's ability to substantially perform his duties under this
     Agreement, which continues for a period of at least one hundred eighty
     (180) continuous days. The Executive shall be entitled to the compensation
     and benefits provided under this Agreement for any period during the
     Employment term and prior to the establishment of the Executive's
     Disability during which the Executive is unable to work due to a physical
     or mental infirmity. Notwithstanding anything contained in this Agreement
     to the contrary, until the Termination Date specified in the Notice of
     Termination (as each term is hereinafter defined) relating to the
     Executive's disability, the Executive shall be entitled to return to his
     position with the Company as set forth in this Agreement in which event no
     Disability of the Executive will be deemed to have occurred.

(3)  Good Reason. The Executive may terminate his employment for "Good Reason."
     For purposes of this Agreement, "Good Reason" shall mean the occurrence
     after a Change in Control of any of the following events or conditions
     described in Subsections (a) through (e) hereof: (a) any change in the
     Executive's title, position, duties or responsibilities that results in the
     Executive not having duties and responsibilities substantially equivalent
     to or greater than those the Executive had immediately prior to such
     change, (b) the assignment to the Executive of any duties or
     responsibilities which, in the Executive's reasonable judgment, are
     inconsistent with his status, title, position or responsibilities, (c) any
     removal of the Executive from or failure to reappoint or reelect him to any
     of such offices or positions, except in connection with the termination of
     his employment for Disability, Cause, as a result of his death, or by the
     Executive other than for Good Reason, (d) a reduction in the Executive's
     Base Salary, Bonus or any failure to pay the Executive any compensation or
     benefits to which he is entitled within ten (10) days of the date due, or
     (e) the Executive is required to perform a substantial portion of his
     duties and responsibilities required hereunder outside the Dallas/Fort
     Worth metropolitan area.

4.2  Upon termination of the Executive's employment during the Employment Term,
     the Executive shall be entitled to the following benefits:

(1)  If the Executive's employment with the Company is terminated (a) by the
     Company for Cause or Disability, (b) by reason of the Executive's death, or
     (c) by the Executive other than for Good Reason, the Company shall pay the
     Executive all amounts earned or accrued through the Termination Date,
     including Base Salary, reimbursement for reasonable and necessary expenses
     incurred by the Executive on behalf of the Company during the period ending
     on the Termination Date, and all unpaid accumulated and accrued benefits
     due under any benefit plan or program in which the Executive was a
     participant in accordance with the terms and conditions of such plan or
     program ("Accrued Compensation"). In addition to the foregoing, if the
     Executive's employment is terminated by the Company for Disability or by
     reason of the Executive's death, the Company shall pay the Executive or his
     beneficiaries an amount equal to his Bonus multiplied by a fraction the
     numerator of which is the number of days in such fiscal year through the
     Termination Date and the denominator of which is 365 ("Pro-Rata Bonus").
     The Executive's entitlement to any other compensation or benefits shall be
     determined in accordance with the Company's employee benefit plan,
     including stock option plans, and other applicable programs and practices
     then in effect.

(2)  If the Executive's employment is terminated by the Company for reasons
     other than change of control, Cause, Disability, or by reason of the
     Executive's death, the Executive will be entitled to the following: (a) the
     Company shall pay the Executive all Accrued Compensation and a Pro Rata
     Bonus, (b) the Company shall pay the Executive as severance pay and in lieu
     of any further compensation for periods subsequent to the Termination Date,
     in a single payment, an amount in cash equal to one (1) times the sum of
     the Executive's then current Base Salary, (c) the Company shall provide the
     Executive twelve (12) months of out placement services at the Company's
     sole expense, (d) for a term of one (1) year following the Termination
     Date, or until the Executive gains new employment with substantially
     similar benefits, the Company, at its expense, shall provide the Executive
     and his immediate family the same level of health benefits, including,
     without limitation, medical, dental, disability, and life insurance,
     provided the Executive and his immediate family at any time

<PAGE>   4

     within six (6) months of the Termination Date, and (e) all stock options
     granted the Executive will be immediately vested in accordance with any
     stock option agreements between the Executive and the Company currently in
     effect at the Termination Date.

(3)  If the Executive's employment is terminated by the Company within
     twenty-four (24) months after a change of control for reasons other than
     Cause, Disability, by reason of the Executive's death; or if the Executive
     terminates his employment with the Company for Good Reason, the Executive
     will be entitled to the following: (a) the Company shall pay the Executive
     all Accrued Compensation and a Pro Rata Target Bonus, (b) the Company shall
     pay the Executive as severance pay and in lieu of any further compensation
     for periods subsequent to the Termination Date, in a single payment, an
     amount in cash equal to two and ninety-nine one hundredths percent (2.99%)
     times the sum of (i) the Executive's then current Base Salary and (ii) the
     Targeted Bonus (not subject to reduction), (c) the Company shall provide
     the Executive twelve (12) months of out placement services at the Company's
     sole expense, (d) for a term of three (3) years following the Termination
     Date, or until the Executive gains new employment with substantially
     similar benefits, the Company, at its expense, shall provide the Executive
     and his immediate family the same level of health benefits, including,
     without limitation, medical, dental, disability, and life insurance,
     provided the Executive and his immediate family at any time within six (6)
     months of the Termination Date, and (e) all stock options granted the
     Executive will be immediately vested in accordance with any stock option
     agreements between the Executive and the Company currently in effect at the
     Termination Date.

4.3  The amounts provided for in Sections 4.2(1) and 4.2(2) of this Agreement
     shall be paid within five (5) working days after the Executive's
     Termination Date.

4.4  The Executive shall not be required to mitigate the amount of any payment
     provided for in this Agreement by seeking other employment or otherwise and
     no such payment shall be offset or reduced by the amount of any
     compensation or benefits provided the Executive in any subsequent
     employment except as provided in Section 4.2(2)(d).

4.5  The severance pay and benefits provided for in Sections 4.2(1) and 4.2(2)
     of this Agreement shall be in lieu of any other severance pay to which the
     Executive may be entitled under any Company severance plan, program or
     arrangement.

4.6  As used in this Agreement, the term "Change of Control" shall have the same
     meaning as ascribed to it in the Company's 1997 Stock Option Plan (Exhibit
     A) or as amended from time to time.

5.   EXCISE TAX PAYMENTS

5.1  In the event that any payment or benefit (within the meaning of Section
     280G of the Internal Revenue Code of 1986, as amended (the "Code") to the
     Executive or for his benefit paid or payable pursuant to the terms of this
     Agreement or otherwise arising out of his employment with the Company, or a
     change of ownership or effective control of the Company or of a substantial
     portion of its assets (a "Payment" or "Payments"), would be subject to
     excise tax imposed by Section 4999 of the Code or any interest or penalties
     are incurred by the Executive with respect to such excise tax (such excise
     tax, together with any such interest or penalties, are hereinafter
     collectively referred to as the "Excise Tax"), then the Executive will be
     entitled to receive an additional payment (the "Gross-Up Payment") in an
     amount such that after payment by the Executive of all applicable taxes,
     interest and penalties (other than interest and penalties due to the
     Executive's failure to timely file a tax return or pay taxes shown on his
     return) including any Excise Tax imposed upon the Gross-Up Payment, the
     Executive retains an amount of the Gross-Up Payment equal to the Excise Tax
     imposed upon the Payments.

5.2  The Company shall bear any expense necessary in determining whether a
     Gross-Up Payment is required pursuant to this Agreement. The Gross-Up
     Payment, if any, shall be paid by the Company to the Executive within five
     days of the Company's receipt of a determination from any accounting firm
     satisfactory to the Executive that such Gross-Up Payment is required.

<PAGE>   5

6.   CONFIDENTIAL INFORMATION. The Executive acknowledges and agrees that he
     will not, without the prior written consent of the Company, at any time
     during the Employment Term or for a period of three (3) years thereafter,
     except as may be required by any competent legal authority, use or disclose
     to any person, firm or other legal authority, any confidential records,
     secrets or information related to the Company or any of its subsidiaries.
     The Executive acknowledges and agrees that all information and secrets of
     the Company and/or its subsidiaries that he has acquired or may acquire,
     were received, or will be received in confidence and as a fiduciary of the
     Company. The Executive will exercise utmost diligence to protect and guard
     such information and secrets.

7.   SUCCESSORS AND ASSIGNS. This Agreement shall be binding upon and shall
     inure to the benefit of the Company, its successors and assigns and the
     Company shall require any successor or assign to expressly assume and agree
     to perform this Agreement in the same manner and to the same extent that
     the Company would be required to perform if no such succession or
     assignment had taken place. The term "Company" as used herein shall include
     such successors and assigns. The term "successors and assigns" as used
     herein shall mean a corporation or other entity acquiring all or
     substantially all the assets and the business of the Company (including
     this Agreement) whether by operation of law or otherwise. Neither this
     Agreement nor any right or interest hereunder shall be assignable or
     transferable by the Executive, his beneficiaries or legal representatives,
     except by will or by the laws of descent or distribution. This Agreement
     shall inure to the benefit of and be enforceable by the Executive's legal
     personal representative.

8.   NOTICE. For purposes of this Agreement, notices and all other
     communications provided for in this Agreement (including the Notice of
     Termination) shall be in writing and shall be deemed to have been duly
     given when personally delivered or sent certified mail, return receipt
     requested, postage prepaid, addressed to the respective addresses last
     given by each party to the other, provided, that all notices to the Company
     shall be directed to the Board with a copy to the Secretary of the Company.

9.   NON-EXCLUSIVITY OF RIGHTS. Nothing in this Agreement shall prevent or limit
     the Executive's continuing or future participation in any benefit, bonus,
     incentive or other plan or program provided by the Company or any of its
     subsidiaries and for which the Executive may qualify, nor shall anything
     herein limit or reduce such rights as the Executive may have under any
     other agreements with the Company or its subsidiaries. Amounts which are
     vested benefits or which the Executive is otherwise entitled to receive
     under any plan or program of the Company or any of its subsidiaries shall
     be payable in accordance with such plan or program, except as explicitly
     modified by this Agreement.

10.  SETTLEMENT OF CLAIMS. The Company's obligation to make the payments
     provided for in this Agreement and otherwise to perform its obligations
     hereunder shall not be affected by any circumstances, including without
     limitation, any set-off, counterclaim, defense, recoupment, or other right
     which the Company may have against the Executive or others.

11.  MISCELLANEOUS. No provision of this Agreement may be modified, waived or
     discharged unless such waiver, modification or discharge is agreed to in
     writing and signed by the Executive and the Company.

12.  GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED AND
     ENFORCED IN ACCORDANCE THE LAWS OF THE STATE OF DELAWARE WITHOUT GIVING
     EFFECT TO THE CONFLICT OF LAW PRINCIPLES THEREOF.

13.  SEVERABILITY. The provisions of this Agreement shall be deemed severable
     and the invalidity or unenforceability of any provision shall not affect
     the validity or enforceability of the other provisions hereof.

14.  WAIVER OF DEFAULT. Any waiver by either party of a breach of any provision
     in this Agreement shall not operate as or be construed as a waiver of any
     subsequent breach thereof.

<PAGE>   6

15.  ENTIRE AGREEMENT. This Agreement represents the entire agreement between
     the parties with respect to the subject matter hereof and supersedes any
     and all prior agreements and understandings with respect to such subject
     matter.

IN WITNESS WHEREOF, the parties hereto have duly executed this Agreement
effective as of the Effective Date.

                                            Remington Oil and Gas Corporation

                                            By:
                                                --------------------------------
                                            Title:
                                                  ------------------------------

                                            Executive:

                                            ------------------------------------
                                            James A. Watt

<PAGE>   7

                                    EXHIBIT A

         A "Change of Control" shall mean any of the following events:

         (i) a merger or consolidation to which the Company is a party if the
individuals and entities who were stockholders of the Company immediately prior
to the effective date of such merger or consolidation have beneficial ownership
(as defined in Rule 13d-3 under the Exchange Act) of less than 50% of the total
combined voting power for election of directors of the surviving corporation
following the effective date of such merger or consolidation;

         (ii) the acquisition or holding of direct or indirect beneficial
ownership (as defined under Rule 13d-3 of the Exchange Act) of securities of the
Company representing in the aggregate 30% or more of the total combined voting
power of the Company's then issued and outstanding voting securities by any
person, entity or group of associated persons or entities acting in concert,
other than S-Sixteen Holding Company, any employee benefit plan of the Company
or of any subsidiary of the Company, or any entity holding such securities for
or pursuant to the terms of any such plan, beginning from and after such time as
S-Sixteen Holding Company shall no longer have direct or indirect beneficial
ownership (as so defined) of securities of the Company representing in the
aggregate a larger percentage of the total combined voting power of the
Company's then issued and outstanding securities than that held by any other
person, entity or group;

         (iii)    the sale of all or substantially all of the assets
of the Company to any person or entity that is not a wholly owned
subsidiary of the Company; or

         (iv) the approval by the stockholders of the Company of any plan or
proposal for the liquidation of the Company or its material subsidiaries, other
than into the Company.<PAGE>   1
                                                                    EXHIBIT 10.7

                                AMENDMENT TO THE
                             GAS PURCHASE AGREEMENT
                                DATED MAY 3, 1994

     THIS AMENDMENT (the "July 1999 Amendment"), made and entered into as of the
1st day of July 1999, between Dominion Black Warrior Basin, Inc. ("Seller") and
Sonat Marketing Company L.P. ("Buyer").

                                   WITNESSETH

     WHEREAS, Buyer and Seller entered into a Gas Purchase Agreement dated May
3, 1994, as amended by Amendments dated April 1, 1996, May 16, 1996, and April
9, 1998 ("the 1994 Agreement"); and

     WHEREAS, Buyer and Seller desire to further amend the 1994 Agreement to
establish Floor and Ceiling Prices for a given quantity and a fixed price for an
equal quantity and related procedures to be effective during the calendar year
2000;

     NOW THEREFORE, in consideration of the premises and mutual covenants
contained herein, the parties hereby mutually understand and agree as follows:

         1. Section 2.1 of the 1994 Agreement shall be deleted in its entirety
and the following Section 2.1 substituted therefor:

         2.1 Subject to the terms and conditions hereinafter set forth,
         commencing on the Effective Date, Seller agrees to sell and deliver,
         and Buyer agrees to purchase and receive one hundred percent (100%) of
         the gas produced in the Field attributable to Seller's interest therein
         as described on Exhibit A hereto. On Revised Exhibit B attached hereto,
         Seller has designated for each month of the primary term hereof
         commencing on the Effective Date, the projected production for such
         month (the "Monthly Base Quantity"). Any gas produced during a month in
         excess of the Monthly Base Quantity shall be deemed the "Excess
         Quantity".

                                       1

<PAGE>   2

          2. Effective January 1, 2000 through December 31, 2000, Sections 4.1,
4.2 and 4.3 of the 1994 Agreement shall be deleted in its entirety and the
following Sections 4.1, 4.2 and 4.3 shall be substituted therefor:

          4.1 The price payable by Buyer for each MMBtu of Monthly Base quantity
          purchased hereunder during each month of the primary term hereof
          commencing on January 1, 2000 shall be divided into two categories, a
          Fixed Price Quantity and an Index Price Quantity, as described in
          Revised Exhibit D hereto. The price for each MMBtu of Fixed Price
          Quantity shall be $2.45 per MMBtu (the "Monthly Fixed Contract
          Price"). The price for each MMBtu of Index Price Quantity shall be the
          sum of (a) the price published in the price table dated the first
          (1st) day of the applicable month by Inside F.E.R.C.'s Gas Market
          Report for "Prices of Spot Gas Delivered to Pipelines" "Southern
          Natural Gas Co." "Louisiana" "Index" (the "Index Price") and (b) a
          Premium per MMBtu as described below (the "Monthly Index Contract
          Price"):

<TABLE>
<CAPTION>
                    Index Price                      Premium
                    ($/MMBtu)                       ($/MMBtu)
                    ---------                       ---------
<S>                                                     <C>
                    Below 2.00                          0.050
                    2.00 - 2.25                         0.060
                    2.26 - 2.50                         0.065
                    Above 2.50                          0.070
</TABLE>

          4.2 The above Section 4.1 notwithstanding, the Index Price component
          of the Monthly Index Contract Price payable during each month shall,
          in no event, be less than $2.20 per MMBtu (the "Floor Price"), nor
          more than $2.82 per MMBtu (the "Ceiling Price"); provided, however,
          that the Premium shall be based on the actual Index Price regardless
          whether such Index Price falls below the Floor Price.

          4.3 The price payable by Buyer for each MMBtu of Excess Quantity
          during the primary term hereof commencing on January 1, 2000 shall be
          the sum of the Index Price and $.02 per MMBtu (the "Excess Quantity
          Contract Price").

          3. Exhibit B is deleted in its entirety and the attached Revised
          Exhibit B is substituted therefor.

          4. Exhibit D is deleted in its entirety and the attached Revised
          Exhibit D is substituted therefor and is effective during the calendar
          year 2000 only.

                                       2

<PAGE>   3

          IN WITNESS WHEREOF, the parties hereto have executed this July 1999
          Amendment in duplicate originals as of date hereinabove first written.

         Witness:                           SONAT MARKETING COMPANY L.P.

                                            By   /s/ Edward J. Crenshaw
         --------------------------              -------------------------------
                                                 Edward J. Crenshaw
         --------------------------              Vice President - Marketing

         Witness:                           DOMINION BLACK WARRIOR BASIN, INC.

                                                 /s/ G.E. Lake, Jr.
                                                 -------------------------------
                                                 G.E. Lake, Jr.

                                       3

<PAGE>   4

                                REVISED EXHIBIT B
                               DATED JULY 1, 1999
                                     TO THE
                             GAS PURCHASE AGREEMENT
                                     BETWEEN
                       DOMINION BLACK WARRIOR BASIN, INC.
                                       AND
               SONAT MARKETING COMPANY L.P., SUCCESSOR-IN-INTEREST
                           TO SONAT MARKETING COMPANY
                                      DATED
                                   MAY 3, 1994

<TABLE>
<CAPTION>
             Month/Year                       Monthly Base Quantity
             ----------                       ---------------------
<S>                                          <C>
               Jun-94                              2,049,266
               Jul-94                              2,024,890
               Aug-94                              1,997,383
               Sep-94                              1,973,850
               Oct-94                              1,951,089
               Nov-94                              1,927,251
               Dec-94                              1,906,933
               Jan-95                              1,885,876
               Feb-95                              1,863,385
               Mar-95                              1,843,489
               Apr-95                              1,823,962
               May-95                              1,805,450
               Jun-95                              1,787,173
               Jul-95                              1,771,348
               Aug-95                              1,756,032
               Sep-95                              1,740,875
               Oct-95                              1,726,083
               Nov-95                              1,711,675
               Dec-95                              1,698,140
               Jan-96                              1,685,535
               Feb-96                              1,673,928
               Mar-96                              1,663,482
               Apr-96                              1,652,832
               May-96                              1,643,705
               Jun-96                              1,633,814
               Jul-96                              1,625,079
               Aug-96                              1,614,930
               Sep-96                              1,604,315
               Oct-96                              1,593,147
               Nov-96                              1,581,881
               Dec-96                              1,571,915
               Jan-97                              1,562,875
</TABLE>

                                       4

<PAGE>   5

<TABLE>
<CAPTION>

             Month/Year                     Monthly Base Quantity
             ----------                     ---------------------
<S>                                        <C>
               Feb-97                               1,554,163
               Mar-97                               1,540,578
               Apr-97                               1,525,042
               May-97                               1,510,269
               Jun-97                               1,494,454
               Jul-97                               1,477,976
               Aug-97                               1,461,398
               Sep-97                               1,444,593
               Oct-97                               1,427,214
               Nov-97                               1,408,676
               Dec-97                               1,389,533
               Jan-97                               1,368,701
               Feb-98                               1,342,469
               Mar-98                               1,319,441
               Apr-98                               1,296,269
               May-98                               1,272,573
               Jun-98                               1,249,204
               Jul-98                               1,225,774
               Aug-98                               1,201,433
               Sep-98                               1,178,126
               Oct-98                               1,154,755
               Nov-98                               1,131,388
               Dec-98                               1,109,349
               Jan-99                               1,198,000
               Feb-99                               1,171,000
               Mar-99                               1,136,000
               Apr-99                               1,140,000
               May-99                               1,106,000
               Jun-99                               1,094,000
               Jul-99                               1,096,000
               Aug-99                               1,071,000
               Sep-99                               1,053,000
               Oct-99                               1,045,000
               Nov-99                               1,007,000
               Dec-99                               1,008,000
               Jan-00                               1,200,000
               Feb-00                               1,200,000
               Mar-00                               1,200,000
               Apr-00                               1,200,000
               May-00                               1,150,000
               Jun-00                               1,150,000
               Jul-00                               1,150,000
               Aug-00                               1,150,000
</TABLE>

                                       5

<PAGE>   6

<TABLE>
<CAPTION>

              Month/Year                     Monthly Base Quantity
              ----------                     ---------------------
<S>                                         <C>
                Sep-00                               1,100,000
                Oct-00                               1,100,000
                Nov-00                               1,100,000
                Dec-00                               1,100,000
                Jan-01                               1,050,000
                Feb-01                               1,050,000
                Mar-01                               1,050,000
                Apr-01                               1,050,000
                May-01                               1,000,000
                Jun-01                               1,000,000
                Jul-01                               1,000,000
                Aug-01                               1,000,000
                Sep-01                                 950,000
                Oct-01                                 950,000
                Nov-01                                 950,000
                Dec-01                                 950,000
</TABLE>

                                       6

<PAGE>   7

                                REVISED EXHIBIT D
                               DATED JULY 1, 1999
                                     TO THE
                             GAS PURCHASE AGREEMENT
                                     BETWEEN
                       DOMINION BLACK WARRIOR BASIN, INC.
                                       AND
               SONAT MARKETING COMPANY L.P., SUCCESSOR-IN-INTEREST
                           TO SONAT MARKETING COMPANY
                                      DATED
                                   MAY 3, 1994

<TABLE>
<CAPTION>
                                  Fixed Price Quantities        Index Quantities
             Month/Year                  (MMBtu)                    (MMBtu)
             ----------           ----------------------        ----------------
<S>                               <C>                           <C>
               Jan-00                    600,000                    600,000
               Feb-00                    600,000                    600,000
               Mar-00                    600,000                    600,000
               Apr-00                    600,000                    600,000
               May-00                    575,000                    575,000
               Jun-00                    575,000                    575,000
               Jul-00                    575,000                    575,000
               Aug-00                    575,000                    575,000
               Sep-00                    550,000                    550,000
               Oct-00                    550,000                    550,000
               Nov-00                    550,000                    550,000
               Dec-00                    550,000                    550,000
</TABLE>

                                       7

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00006-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00006-of-00352.parquet"}]]