Document:

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                                                                   EXHIBIT 10.55

                          CRUDE OIL PURCHASE AGREEMENT

                              DATED MARCH 14, 2000

                                     BETWEEN

                        SOUTHERN PRODUCER SERVICES, L.P.,
                                   AS "BUYER"

                                       AND

                           TRANSTEXAS GAS CORPORATION,
                                   AS "SELLER"

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                          CRUDE OIL PURCHASE AGREEMENT

This CRUDE OIL PURCHASE AGREEMENT (herein called "this Agreement") is entered
into as of March 14, 2000, by and between TransTexas Gas Corporation (herein
called the "Seller") and Southern Producer Services, L.P. (herein called the
"Buyer"), and shall govern the terms and conditions whereby Seller shall sell,
and Buyer shall purchase, certain crude oil and/or condensate (herein
collectively called "Crude Oil"). Buyer and Seller are sometimes referred to
singularly as "Party" and collectively as "Parties". Certain capitalized terms
used herein are defined as set forth in Exhibit A hereto or as otherwise
indicated.

                              W I T N E S S E T H:

         WHEREAS, Seller has heretofore filed for protection under Chapter 11 of
the Bankruptcy Code in Case No. 99-21550 in the United States Bankruptcy Court
(herein called the "Court") for the Southern District of Texas (Corpus Christi
Division), entitled "In re: TransTexas Gas Corporation, et. al." (herein called
the "Bankruptcy Case");

         WHEREAS, pursuant to the Bankruptcy Case, the Court has issued an order
(herein called the "Bankruptcy Order") granting Seller's motion for permission
to (1) sell the Production Payment (as hereinafter defined) and enter into and
deliver to Grantee (as hereinafter defined) the Conveyance (as hereinafter
defined) and other ancillary marketing, transportation and processing agreements
and (2) amend or amend and restate and affirm certain existing marketing,
transportation and processing agreements with third parties in order to
relinquish certain of Seller's capacity under such existing marketing,
transportation and processing agreements as is required for Buyer to market,
transport and/or process the Production Payment hydrocarbons that Buyer and Fund
V (as hereinafter defined) and Fund VI (as hereinafter defined) own or control
and such other volumes of hydrocarbons as Buyer shall purchase from Seller or
other third parties;

         WHEREAS, pursuant to the Bankruptcy Order, Seller and Grantee have
entered into that certain Production Payment Conveyance (herein, as from time to
time amended, restated or otherwise modified, called the "Conveyance"), dated as
of March 14, 2000, from and by Seller, as grantor, and Buyer, TCW Portfolio No.
15555 DR V Sub-Custody Partnership, L.P. (herein called "Fund V") and TCW DR VI
Investment Partnership, L.P. (herein called "Fund VI") (in such capacity, Fund
VI together with Buyer and Fund V, collectively called the "Grantee"), whereby
Seller has granted, bargained, sold, conveyed, assigned, transferred, set over
and delivered to Grantee a term overriding royalty interest (herein called the
"Production Payment") in the Subject Interests (as defined in the Conveyance and
herein so called);

         WHEREAS, pursuant to the terms of the Conveyance, production from the
Subject Interests shall be dedicated to the Grantee as (1) at fifty percent
(50%) from March 1, 2000 until 9:00 a.m., Central Time, on September 1, 2000,
(2) at sixty-two percent (62%) from 9:00 a.m., Central Time, on September 1,
2000 until 9:00 a.m., Central Time, on March 1, 2001 and (3) seventy percent

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(70%) from and after 9:00 a.m., Central Time, on March 14, 2001 until the
Termination Time (herein called the "Dedication Percentage");

         WHEREAS, pursuant to the Bankruptcy Order, Seller and Grantee have
entered into that certain Purchase Agreement (herein, as from time to time
amended, restated, supplemented or otherwise modified, called the "Purchase
Agreement"), dated as of March 1, 2000, between Seller and Grantee and TCW Asset
Management Company, as agent on behalf of Fund V and Fund VI (herein called the
"Funds Agent"), whereby Seller has sold the first component of the Production
Payment to Grantee pursuant to the Conveyance, and Grantee has purchased the
same from Seller;

         WHEREAS, the Grantee and Buyer have entered into that certain
Production Sales Agreement (as defined in the Purchase Agreement and herein, as
from time to time amended, restated, supplemented or otherwise modified, called
the "Production Sales Agreement"), dated as of March 14, 2000 pursuant to which
Buyer has agreed to purchase, and Grantee has agreed to sell, Grantee's interest
in the Production Payment hydrocarbons; and

         WHEREAS, subject to the terms and conditions hereinafter set forth,
Buyer desires to purchase certain quantities of Crude Oil from Seller and Seller
desires to sell such quantities of Crude Oil to Buyer;

         NOW, THEREFORE, in consideration of the premises and of the mutual
covenants hereinafter set forth, the Parties hereto covenant and agree as
follows:

1. QUANTITY: Seller agrees to sell and Buyer agrees to purchase, subject to the
other provisions of this Agreement, one hundred percent (100%) of the Crude Oil
that Seller owns, controls or has the authority to sell pursuant to the
Conveyance (as such Exhibit may from time to time be amended, restated,
supplemented or otherwise modified) and that is capable of being transported to
Buyer's Purchaser under contracts with Buyer's Transporters (herein called the
"Marketed Volumes"). Seller hereby agrees to sell to Buyer, and Buyer hereby
agrees to purchase from Seller, upon the terms of this Agreement, all of the
Marketed Volumes.

2. QUALITY: The Marketed Volumes delivered shall meet the Quality Specifications
then in effect for such Crude Oil as established by the Buyer's Transporter
and/or Buyer's Purchaser receiving such Marketed Volumes. Quality, quantity and
gravity of Crude Oil delivered hereunder, shall be determined in accordance with
the terms of the relevant Buyer's Sales Contract or Buyer's Transporter's
contract concerning such Marketed Volumes. In the event that such Buyer's Sales
Contract or Buyer's Transporter's contract fails to specify such terms, quality,
quantity and gravity shall be determined in accordance with generally accepted
industry practices in effect at the time and place of delivery to Buyer, or
Buyer's designee, using the latest A.S.T.M. or A.P.I. test methods, with volumes
being corrected to 60 degrees Fahrenheit temperature in accordance with the
latest A.S.T.M. test methods and the latest edition of A.P.I. volume correction
tables, and full deductions being made for all basic sediment and water and
other impurities. In the event Seller tenders or causes to be tendered Crude Oil
not meeting the Quality Specifications, without prejudice to any

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other remedy, Buyer may (to the extent it is able to do so under its own sales
and transportation agreements) accept delivery subject to a reduction in Net
Price as provided in the definition of such term to compensate Buyer for the
reasonable charges resulting therefrom, otherwise Buyer, or Buyer's designee,
may elect not to accept delivery.

3. DELIVERY LOCATION: Seller shall sell and deliver or cause to be delivered all
Crude Oil to Buyer, or to Buyer's designee, at Seller's Delivery Point. In the
event Seller delivers or causes to be delivered Crude Oil at any other delivery
point, Buyer may (to the extent it is able to do so under its own sales and
transportation agreements) accept delivery subject to a reduction in Net Price
as provided in the definition of such term to compensate Buyer for the
reasonable charges resulting therefrom, otherwise Buyer, or Buyer's designee,
may elect not to accept delivery.

4. TITLE AND RISK OF LOSS: Title to all Crude Oil sold hereunder shall pass to
Buyer at the Seller's Delivery Point for such Crude Oil described in Paragraph 3
of this Agreement. As between the Parties hereto, Buyer shall be deemed in
possession of and solely liable and responsible for said Crude Oil after its
delivery at the Buyer's Delivery Points and Seller shall be deemed in possession
of and solely liable and responsible for said Crude Oil at all times prior to
such delivery. Each Party shall indemnify and defend the other Party for and
save it harmless from, any and all losses, costs, expenses, damages, injuries,
or liabilities caused by the Crude Oil in its possession to the extent not due
to or contributed to by the negligent act or omission of the other Party. In the
event and to the extent Seller discharges in full, in immediately available
funds, any obligation under the indemnity to Buyer pursuant to this Paragraph 4,
Buyer, to the extent it is able to do so under its own transportation,
processing and sales agreements, agrees to assign to Seller any rights of
indemnification running in favor of Buyer under any such agreement; provided,
however, if Buyer is unable to assign such rights to Seller, Buyer shall,
pursuant to written instructions of Seller and agreement by Seller to reimburse
Buyer for any related costs and expenses therewith, diligently pursue any
remedies running in favor of Buyer at the sole cost and expense of Seller. Buyer
agrees to apply any sums so obtained on behalf of Seller pursuant to any of
Buyer's transportation, processing or sales agreements as an addition to the Net
Price, net of any costs and expenses of Buyer not previously reimbursed by
Seller. The provisions of this Paragraph 4 shall survive the termination of this
Agreement.

5. INDEMNITY:

(a)      In consideration of the execution and delivery of this Agreement by the
         Buyer, the Seller hereby indemnifies, exonerates and holds the Buyer
         and each of its respective officers, directors, employees and agents
         (herein, collectively, called the "Indemnified Parties") free and
         harmless from and against any and all actions, causes of action, suits,
         losses, costs, liabilities, damages and expenses (including, without
         limitation, reasonable attorney's fees and disbursements) incurred in
         connection therewith (irrespective of whether any such Indemnified
         Party is a Party to the action for which indemnification hereunder is
         sought), excluding any portion of such actions, causes of action,
         suits, losses, costs, liabilities, damages and expenses (including,
         without limitation, attorney's fees and disbursements)

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         resulting from the gross negligence or wilful misconduct of any
         Indemnified Party (herein collectively called the "Indemnified
         Amounts"), incurred by the Indemnified Parties or any of them as a
         result of, or arising out of, or relating to (1) Buyer's Marketing
         Agreements or (2) this Agreement. IT IS UNDERSTOOD BY THE PARTIES
         HERETO THAT THE INDEMNITIES BY SELLER IN FAVOR OF THE BUYER IN THIS
         AGREEMENT SHALL BE APPLICABLE NOTWITHSTANDING THAT ANY INDEMNIFIED
         AMOUNT OTHERWISE COVERED BY THIS AGREEMENT ARE ATTRIBUTABLE TO THE
         NEGLIGENCE (OTHER THAN GROSS NEGLIGENCE OR WILFUL MISCONDUCT) OF BUYER
         (WITHOUT REGARD TO WHETHER SUCH NEGLIGENCE IS SOLE, JOINT, CONCURRENT,
         ACTIVE OR PASSIVE), ANY PRE-EXISTING CONDITION OR DEFECT OR ANY FORM
         OF STRICT LIABILITY.

(b)      In the event that Buyer incurs, owes or is liable for any Indemnified
         Amount under Clause (a) above, Seller shall pay such Indemnified Amount
         by wire transfer of immediately available funds to Buyer within five
         (5) days following Buyer's written demand therefor. In addition to, and
         not in limitation of the foregoing, Buyer is hereby authorized at any
         time and from time to time, without notice to Seller, to setoff and
         apply any and all sums held and any other sums at any time owing to or
         for the credit or the account of Seller against any and all sums owing
         to Buyer (including, without limitation, reasonable attorney's fees and
         disbursements and any Indemnified Amount), together with interest on
         such amounts at the Agreed Rate until paid in full, irrespective of
         whether or not Buyer will have made any demand under this Agreement.
         Buyer agrees promptly to notify Seller after any such setoff and
         application. The rights of the Buyer under this Section are in addition
         to other rights and remedies (including, without limitation, other
         rights of setoff) which Buyer may have. The provisions of Clauses (a)
         and (b) of this Paragraph 5 shall survive the termination of this
         Agreement.

6.       PRICE AND NET PRICE:

(a)      The Price per Barrel of Crude Oil on which the Net Price shall be
         determined shall be the Price per Barrel of Crude Oil paid to Buyer by
         the relevant Buyer's Purchaser for such Crude Oil delivered hereunder
         during each applicable calendar Month from each field listed in Exhibit
         B hereto.

(b)      As described in Paragraph 9 below, Buyer will pay the Net Price to
         Seller for all Marketed Volumes delivered to Buyer and subsequently
         delivered to the relevant Buyer's Purchaser and accepted and paid for
         by such Buyer's Purchaser hereunder.

7.       INVOICES AND ACCOUNTING CORRESPONDENCE: Invoices and any other notices
or documentation shall be mailed or telecopied to the following addresses:

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SELLER:                                        BUYER:

TransTexas Gas Corporation                     Southern Producer Services, L.P.
1300 North Sam Houston Parkway East            1200 Smith Street
Suite 310                                      Suite 2890
Houston, TX 77032-2949                         Houston, Texas 77251-1188
Attention: Revenue Accounting                  Attention: Ron Franklin
Telephone No.: (281) 987-8600                  Telephone No.: (713) 276-1916
Fax No.: (281) 986-8855                        Fax No.:  (713) 276-1990

8. DELIVERY PERIOD: Subject to the other terms and provisions hereof, deliveries
hereunder shall commence with respect to production from and after 9:00 A.M. on
March 1, 2000, and shall continue for a primary term equal to the greater of (a)
three (3) years or (b) a period equal to the term of the Production Payment
(herein called the "Delivery Period") and Month to Month thereafter until
terminated by Buyer and Seller upon the giving of written notice to the other
Party of its intention to terminate this Agreement at least thirty (30) Days
prior to the end of the primary term or an extension thereof; provided, however,
Buyer may terminate this Agreement, in full or in part, at any time upon the
giving of thirty (30) days notice of such termination to Seller, which
termination shall be effective as of the first Day of the Month following the
expiration of such thirty (30) Day notice period. Conclusion of the Delivery
Period shall not affect the accrued rights and obligations of the Parties.

9. STATEMENTS AND PAYMENT:

(a)      Payment of the Net Price by Buyer to Seller is due no later than two
         (2) Business Days following the twenty-fifth (25th) Day of the Month
         following the Month of delivery via wire transfer in immediately
         available funds to the banks and accounts from time to time specified
         by Seller in writing. As of the date hereof, Buyer shall make payment
         to Seller as follows:

                           Bank of New York
                           48 Wall Street
                           New York, New York
                           ABA #021-000-018
                           For the Account of GMAC Commercial Credit LLC
                           Acct. #809-0653-114
                           For further credit to Account #904200

         Payment shall be made against the following documents: Seller's invoice
         and a copy of Buyer's, or its designee's, carrier's receipt of such
         Crude Oil; provided, however, Buyer is hereby authorized at any time
         and from time to time, without notice to Seller, to setoff and apply
         any and all sums held and any other sums at any time owing to or for
         the credit or the account of Seller against any and all sums owing to
         Buyer (including, without limitation, reasonable attorney's fees and
         disbursements), together with interest on such amounts at the

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         Agreed Rate until paid in full, irrespective of whether or not Buyer
         will have made any demand under this Agreement. Buyer agrees promptly
         to notify Seller after any such setoff and application. The rights of
         the Buyer under this Section are in addition to other rights and
         remedies (including, without limitation, other rights of setoff) which
         Buyer may have. If the payment due date falls on a Saturday, Sunday,
         Monday or any Day which is a banking holiday in Houston, Texas, Los
         Angeles, California or Atlanta, Georgia, payment will be made on the
         following Business Day.

(b)      Buyer and Seller shall each have the right to examine, at reasonable
         times, and upon five (5) Business Days prior written notice, the books,
         records, charts, and electronic data of the other to the extent
         reasonably necessary to substantiate the accuracy in all material
         respects of any statement, payment, charge or computation made pursuant
         to this Agreement. Subsequent to any statement having been paid, if any
         overpayment or underpayment in any form whatsoever shall be found,
         Seller shall refund the amount of any overpayment received by Seller,
         and Buyer shall pay the amount of any underpayment due Seller, within
         thirty (30) Days after final determination thereof; provided however,
         no retroactive adjustments will be made for any overpayment or
         underpayment beyond (i) with respect to overpayments or underpayments
         arising under or related to any of Buyer's Marketing Agreements, the
         applicable period for retroactive adjustments provided in such Buyer's
         Marketing Agreements and (ii) with respect to overpayments or
         underpayments arising under or related to this Agreement, a period
         twenty-four (24) Months from the date of any such overpayment or
         underpayment, as the case may be. The provisions of this Clause (b)
         shall survive the termination of this Agreement.

10.      FORCE MAJEURE:

(a)      In the event either Party is rendered unable, wholly or in part, by
         force majeure to carry out its obligations under this Agreement, except
         for the obligations to make payments hereunder, it is agreed that the
         obligations of the Parties, so far as they are affected by such force
         majeure, shall be suspended during the continuance of any inability so
         caused, but for no longer period, and such force majeure shall, so far
         as economically possible, be remedied with all reasonable dispatch.
         Each Party shall give notice and reasonably full particulars of such
         force majeure to the other Party, orally as soon as practicable and
         followed in writing or by electronic transmission within a reasonable
         time after the occurrence of the force majeure relied on.

(b)      The term "force majeure", as employed herein, shall mean acts of God;
         strikes, lockouts or other industrial disturbances; acts of the public
         enemy, wars, blockades, insurrections, civil disturbances and riots,
         and epidemics; landslides, lightning, earthquakes, fires, storms,
         hurricanes and threats of hurricanes, floods and washouts; arrests,
         orders, requests, directives, restraints and requirements of the
         government and governmental agencies, either federal or state, civil
         and military; any application of governmental conservation or
         curtailment rules and regulations; outages (including, without
         limitation, planned or

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         unplanned shutdowns) or failure of any of Buyer's Transporter, Buyer's
         Separator/Stabilizer or Buyer's Purchaser if caused by an event of
         force majeure with respect to such party; explosions, breakage or
         accident to machinery, equipment or lines of pipe; outages (including,
         without limitation, planned or unplanned shutdowns) of equipment,
         machinery or lines of pipe for inspection, maintenance or repair;
         freezing of wells or lines of pipe; premature, partial or entire
         failure of natural gas or crude oil wells, gas or crude oil supply or
         depletion of gas or crude oil reserves; any of the foregoing events or
         circumstances to the extent such event or circumstance affects Seller's
         treating plant, if any or Galveston Bay's Winnie Facility; and other
         causes of a similar nature not reasonably within the control of the
         Party claiming suspension. It is understood and agreed that the
         settlement of strikes or lockouts shall be entirely within the
         discretion of the Party having the difficulty, and that the above
         reasonable dispatch shall not require the settlement of strikes or
         lockouts by acceding to the demand of opposing Party when such course
         is inadvisable or inappropriate in the discretion of the Party having
         the difficulty. Force majeure shall likewise include (i) in those
         instances where either Party hereto is required to obtain servitudes,
         right-of-way grants, permits or licenses to enable such Party to
         fulfill its obligations hereunder, the inability of such Party to
         acquire, or the delays on the part of such Party in acquiring, at
         reasonable cost and after the exercise of reasonable diligence, such
         servitudes, right-of-way grants, permits or licenses; and (ii) in those
         instances where either Party hereto is required to furnish materials
         and supplies for the purpose of constructing or maintaining facilities
         or is required to secure permits or permissions from any governmental
         agency to enable such Party to fulfill its obligations hereunder, the
         inability of such Party to acquire or the delays on the part of such
         Party in acquiring, at reasonable cost and after the exercise of
         reasonable diligence, such materials and supplies, permits and
         permissions.

(c)      The term "force majeure" specifically excludes the following
         occurrences or events: the loss, interruption, or curtailment of
         interruptible transportation on any transporter of Buyer necessary to
         make or take delivery of crude oil hereunder, unless and to the extent
         the same event also curtails firm transportation at the same point; and
         loss of markets. Price changes due to market conditions or economics
         associated with the purchase and sale of crude oil quantities purchased
         and delivered hereunder shall not be considered events of "force
         majeure".

11. WARRANTY: Seller hereby warrants good title to the Crude Oil delivered by
Seller to Buyer and the right to sell the same free and clear from all liens
(excluding liens arising under Section 9.319 of the Uniform Commercial Code as
enacted in the State of Texas, as such may be amended from time to time, and any
successor statute of similar import), encumbrances and adverse claims. Seller
further warrants that Crude Oil delivered shall not be contaminated by chemicals
foreign to virgin Crude Oil (except as required for operational purposes, to the
extent, and only to the extent, permitted under any of Buyer's Marketing
Agreements), including, but not limited to, chlorinated and/or oxygenated
hydrocarbons and lead. Seller agrees to pay, or cause to be paid, or deliver in
kind to the parties entitled thereto all royalties, overriding royalties or like
charges, if any, assessed against the Crude Oil or the value thereof. Seller
shall protect, defend, indemnify and hold

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Buyer and Buyer's Purchaser harmless from and against all suits, actions, debts,
accounts, damages, costs, losses and expenses (including attorney's fees)
arising from or out of any adverse claims of any nature, including royalty
claims, of any and all persons to or against the Crude Oil. In the event any
adverse claim of any character whatsoever is asserted in respect to any of the
Crude Oil, Buyer may suspend its obligations to pay for Crude Oil hereunder and
suspend payments up to the amount of such claim without interest until such
claim has been finally determined, as security for the performance of Seller's
obligations with respect to such claim, or until Seller shall have furnished a
bond to Buyer, or Buyer's designee, in an amount and with securities
satisfactory to Buyer, or Buyer's designee. The provisions of this Section 11
shall survive the termination of this Agreement.

12. TAXES: The Price under this agreement includes full reimbursement for, and
the Seller is liable for and shall pay, cause to be paid or reimburse Buyer,
Buyer's Transporter, Buyer's Purchaser and Buyer's Separator/Stabilizer, if such
party has paid, any ad valorem, property, occupation, severance, production,
extraction, first use, first or subsequent purchase, conservation, gathering,
pipeline, utility, gross production, gross receipts, gross income, oil revenue,
oil import, privilege, sales, use, consumption, Btu, energy, excise, lease,
transaction and any other taxes, governmental charges, assessments, licenses,
fees or permits, or increase thereon, other than taxes based on net income or
net worth (herein collectively called "Taxes") applicable to the Crude Oil sold
hereunder imposed, assessed or collected at or prior to Buyer's Delivery Point.
Seller shall indemnify, defend and hold Buyer, Buyer's Purchaser, Buyer's
Separator/Stabilizer and Buyer's Transporter harmless from any liability against
all such Taxes. The Price does not include reimbursement for, and the Buyer is
liable for and shall pay, cause to be paid or reimburse Seller if Seller has
paid, any Taxes applicable to the Crude Oil sold hereunder imposed, assessed or
collected after Buyer's Delivery Point. Buyer shall indemnify, defend and hold
Seller harmless from any liability against all such Taxes. Notwithstanding the
foregoing, Buyer, as first purchaser of the Marketed Volumes, shall withhold
from the Net Price payable to Seller for such Marketed Volumes, such amounts
imposed, assessed or owing in respect of severance or gross production taxes or
taxes of similar import assessed against the Crude Oil or the value thereof
(herein collectively called "Severance Taxes") and Buyer shall pay or cause to
be paid on behalf of Seller such Severance Taxes withheld, to the relevant
governmental authority to whom such Severance Taxes are owing. In the event that
Buyer fails to pay when due such sums as are actually withheld by Buyer on
behalf of Seller in respect of Severance Taxes, Buyer hereby indemnifies,
exonerates and holds the Seller and each of its respective officers, directors,
employees and agents (herein called the "Seller Indemnified Parties") free and
harmless from and against any and all actions, causes of action, suits, losses,
costs, liabilities, damages and expenses incurred therewith, excluding any
portion of such actions, causes of action, suits, losses, costs, liabilities,
damages and expenses resulting from the gross negligence or wilful misconduct of
any Seller Indemnified Party and including reasonable attorney's fees and
disbursements, incurred by the Seller Indemnified Parties or any of them as a
result of Buyer's failure to pay such Severance Taxes when due.

Both Parties shall use reasonable efforts to administer this agreement and
implement the provisions thereof in accordance with their intent to minimize or
reduce Taxes. Upon request, a Party shall provide the other Party a certificate
of exemption or other reasonably satisfactory evidence of

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exemption from any Taxes, and each Party agrees to cooperate with the other
Party in obtaining any such exemption. The provisions of this Section 12 shall
survive the termination of this Agreement; provided, however, the indemnities
running in favor of the Seller Indemnified Parties shall survive the termination
of this Agreement for only three (3) Months.

13. NON-PERFORMANCE:

(a)      In the event that either Party (herein called the "Non-Performing
         Party") shall (i) make an assignment or any general arrangement for the
         benefit of creditors; (ii) file a petition or otherwise commence,
         authorize or acquiesce in the commencement of a proceeding or cause
         under any bankruptcy or similar law for the protection of creditors or
         have such petition filed or proceeding commenced against it; (iii)
         otherwise become bankrupt or insolvent; (iv) be unable to pay its debts
         as they fall due; (v) fail to make, when due, any payment required
         under this Agreement if such failure is not remedied within two (2)
         Business Days after written notice of such failure is given by the
         Party to whom the payment is owed, provided the payment is not the
         subject of a good faith dispute; (vi) fail to perform any covenant set
         forth in this Agreement (other than an obligation to make payment or
         obligations that are otherwise specifically defined herein as a
         separate Default), and such failure is not excused by force majeure or
         cured within fifteen (15) Days after written notice thereof by the
         Party to whom the covenant is owed (herein, collectively, called a
         "Default"), the other Party (herein called the "Performing Party") may
         at its option (without waiving any other remedy for breach hereof): (i)
         immediately suspend the Performing Party's performance of its
         obligations hereunder, (ii) upon three (3) Days' notice in writing to
         the Non-Performing Party specifying wherein the Default has occurred,
         indicate the Non-Performing Party's election to establish a date on
         which this Agreement will terminate (herein called "Early Termination
         Date"), and (iii) withhold any payments due hereunder; provided,
         however, that upon the occurrence of any Default listed in sub-clauses
         (i) - (iv) of this Clause (a) of this Paragraph 13 for any Party, this
         Agreement shall automatically terminate, without notice, as if an Early
         Termination Date has been immediately declared. The Parties agree that
         this contract constitutes a "forward contract" for purposes of Section
         556 of the U.S. Bankruptcy Code.

(b)      Upon the occurrence of a Designated Event (as defined in the Purchase
         Agreement) and the exercise by Grantee, either on its own behalf or
         through any agent or representative, of any remedy pursuant to Section
         4.6 of the Purchase Agreement or Article V of the Conveyance, Buyer
         may, at its option (without waiving any other remedy for breach
         hereof), immediately suspend the performance of its obligations
         hereunder and withhold any payments due hereunder.

(c)      In the case of a Default, notwithstanding the termination of this
         Agreement pursuant to Clause (a) of this Paragraph 13, each Party
         reserves to itself all rights, setoffs, counterclaims, and other
         remedies and/or defenses, consistent with the provision of Paragraph
         14, which such Party is or may be entitled to assert arising from or
         out of this Agreement, and all

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         obligations to make payments hereunder that are outstanding at the time
         of such default may be off-set against each other, setoff, or recouped
         therefrom.

14. LIABILITIES: NOTWITHSTANDING ANYTHING TO THE CONTRARY CONTAINED HEREIN,
NEITHER PARTY SHALL BE LIABLE OR OTHERWISE RESPONSIBLE TO THE OTHER PARTY FOR
PUNITIVE, SPECIAL, CONSEQUENTIAL, OR INCIDENTAL DAMAGES OR FOR LOST PROFITS
WHICH ARISE OUT OF OR RELATE TO THIS AGREEMENT OR THE PERFORMANCE OR BREACH
THEREOF.

15. ASSIGNMENT: This Agreement shall inure to and be binding upon the successors
and assigns of the assigning Parties. The rights of either party under this
Agreement may be transferred or assigned in whole or in part, but any such
transfer or assignment shall be expressly made subject to the provisions of this
Agreement; provided, further, that (a) no such transfer or assignment shall be
binding on the other Party until the transferring Party has provided to such
other Party a copy of the fully executed instrument of transfer, (b) any such
assignee shall agree in writing to be bound by the terms and conditions hereof,
(c) in the case of an assignment or transfer by Buyer such transfer or
assignment (i) shall relieve the Buyer of responsibility and liability for any
obligations and liabilities arising under the terms of this Agreement after the
effective date of the transfer and (ii) shall be to (X) a Person, the unsecured
long term debt (or if such Person has no outstanding long term debt, its
corporate rating or if such Person has no corporate rating, the long term debt
of such Person's parent or if such Person's parent has no outstanding long term
debt, its parent's corporate rating) of which is rated at least BBB by Standard
& Poor's or Baa2 by Moody's Investors Service, Inc., (Y) a Person who is a
Buyer's Purchaser, or (Z) such Person as Seller shall consent to, which consent
shall not be unreasonably withheld and (d) in the case of Seller, Seller may not
assign or transfer this Agreement without the prior written consent of Buyer,
which consent shall not be unreasonably withheld; provided however, Buyer hereby
consents to the assignment by Seller of Seller's right to money due or to become
due to GMAC Commercial Credit LLC under that certain Third Amended and Restated
Accounts Receivable Management and Security Agreement, dated on or about March
15, 2000, by and between Seller and GMAC Commercial Credit LLC.

16. CHOICE OF LAW: THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED, ENFORCED
AND PERFORMED IN ACCORDANCE WITH THE LAWS OF THE STATE OF TEXAS WITHOUT REGARD
TO THE PRINCIPLES OF CONFLICT OF LAWS. THE PARTIES AGREE THAT THIS AGREEMENT
SHALL BE DEEMED TO HAVE BEEN MADE IN TEXAS. THE PARTIES AGREE THAT THE UNITED
NATIONS CONVENTION ON CONTRACTS FOR THE INTERNATIONAL SALE OF GOODS 1980 SHALL
NOT APPLY TO, OR GOVERN, THIS AGREEMENT.

17. WAIVER OF JURY TRIAL: SELLER AND BUYER HEREBY KNOWINGLY, VOLUNTARILY AND
INTENTIONALLY WAIVE THEIR RESPECTIVE RIGHTS TO A TRIAL BY JURY IN RESPECT OF ANY
LITIGATION BASED HEREON, OR ARISING OUT OF, UNDER, OR IN CONNECTION WITH, THIS
AGREEMENT, OR ANY COURSE OF CONDUCT, COURSE OF DEALING, STATEMENTS (WHETHER
VERBAL OR

                                       10

<PAGE>   12

WRITTEN) OR ACTIONS OF THE SELLER OR THE BUYER. EACH OF THE SELLER AND THE BUYER
ACKNOWLEDGES AND AGREES THAT IT HAS RECEIVED FULL AND SUFFICIENT CONSIDERATION
FOR THIS PROVISION AND THAT THIS PROVISION IS A MATERIAL INDUCEMENT FOR SUCH
PARTY'S ENTERING INTO THE PRODUCTION PAYMENT DOCUMENTS AND THIS AGREEMENT.

18.      SUBMISSION TO JURISDICTION:

(a)      ANY LITIGATION BASED HEREON, OR ARISING OUT OF, UNDER, OR IN CONNECTION
         WITH, THIS AGREEMENT, OR ANY COURSE OF CONDUCT, COURSE OF DEALING,
         STATEMENTS (WHETHER VERBAL OR WRITTEN) OR ACTIONS OF THE BUYER OR THE
         SELLER MAY BE BROUGHT AND MAINTAINED IN THE COURTS OF THE STATE OF
         TEXAS OR IN THE UNITED STATES DISTRICT COURT FOR THE SOUTHERN DISTRICT
         OF TEXAS; PROVIDED, HOWEVER, THAT ANY SUIT SEEKING ENFORCEMENT AGAINST
         ANY PROPERTY MAY BE BROUGHT, AT THE BUYER'S OPTION, IN THE COURTS OF
         ANY JURISDICTION WHERE SUCH PROPERTY MAY BE FOUND. THE SELLER HEREBY
         EXPRESSLY AND IRREVOCABLY SUBMITS TO THE JURISDICTION OF THE COURTS OF
         THE STATE OF TEXAS AND OF THE UNITED STATES DISTRICT COURT FOR THE
         SOUTHERN DISTRICT OF TEXAS FOR THE PURPOSE OF ANY SUCH LITIGATION AS
         SET FORTH ABOVE. THE SELLER FURTHER IRREVOCABLY CONSENTS TO THE SERVICE
         OF PROCESS BY REGISTERED MAIL, POSTAGE PREPAID, OR BY PERSONAL SERVICE
         WITHIN OR WITHOUT THE STATE OF TEXAS. THE SELLER HEREBY EXPRESSLY AND
         IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY LAW, ANY
         OBJECTION WHICH IT MAY HAVE OR HEREAFTER MAY HAVE TO THE LAYING OF
         VENUE OF ANY SUCH LITIGATION BROUGHT IN ANY SUCH COURT REFERRED TO
         ABOVE AND ANY CLAIM THAT ANY SUCH LITIGATION HAS BEEN BROUGHT IN AN
         INCONVENIENT FORUM. TO THE EXTENT THAT THE SELLER HAS OR HEREAFTER MAY
         ACQUIRE ANY IMMUNITY FROM JURISDICTION OF ANY COURT OR FROM ANY LEGAL
         PROCESS (WHETHER THROUGH SERVICE OR NOTICE, ATTACHMENT PRIOR TO
         JUDGMENT, ATTACHMENT IN AID OF EXECUTION OR OTHERWISE) WITH RESPECT TO
         ITSELF OR ITS PROPERTY, THE SELLER HEREBY IRREVOCABLY WAIVES SUCH
         IMMUNITY IN RESPECT OF ITS OBLIGATIONS UNDER THIS AGREEMENT.

(b)      The Parties agree that a final judgment by any court in the
         above-designated jurisdiction covered by this Agreement shall be
         conclusive and may be enforced in other jurisdictions in any manner
         provided by law.

(c)      The Parties hereby waive any claim that a judgment obtained in the
         above-designated jurisdiction is invalid or unenforceable.

                                       11

<PAGE>   13

19. No amendment to any Buyer's Marketing Agreement shall be effective for
purposes of this Agreement unless Seller (a) has consented in writing to such
amendment, which consent shall not be unreasonably withheld or (b) is deemed to
have consented to such amendment pursuant to the terms of this Agreement.

20. This Agreement may be executed in any number of counterparts and by
different parties hereto on separate counterparts, each of which when so
executed and delivered shall be deemed to be an original, but all of which shall
taken together constitute one and the same instrument. Any signature delivered
by a party by facsimile transmission shall be deemed to be an original hereto.

                            [Signature pages follow]

                                       12

<PAGE>   14

         IN WITNESS WHEREOF, Buyer and Seller have executed and delivered this
Agreement as of the date first written above.

                                       BUYER:
                                       -----

                                       SOUTHERN PRODUCER SERVICES, L.P.

                                       By:  SC Ashwood Holdings, Inc.,
                                            as its general partner

                                       By:
                                          ------------------------------------
                                       Name:     David W. Stewart
                                       Title:    Vice President

                                       SELLER:
                                       ------

                                       TRANSTEXAS GAS CORPORATION

                                       By:
                                          ------------------------------------
                                       Name:     Ed Donahue
                                       Title:    Vice President

ACKNOWLEDGED AND AGREED TO:

GMAC COMMERCIAL CREDIT LLC

By:
   ----------------------------
Name:
Title:<PAGE>   1
                                                                   EXHIBIT 10.56

                            NATURAL GAS TREATING AND
                          CONDENSATE HANDLING AGREEMENT

                                     BETWEEN

                      GALVESTON BAY PROCESSING CORPORATION,
                                 AS "PROCESSOR"

                                       AND

                        SOUTHERN PRODUCER SERVICES, L.P.,
                                   AS "OWNER"

                                 March 14, 2000

<PAGE>   2

             NATURAL GAS TREATING AND CONDENSATE HANDLING AGREEMENT

         THIS NATURAL GAS TREATING AND CONDENSATE HANDLING AGREEMENT (herein
called this "Agreement"), made and entered into as of this 14th day of March,
2000, by and between Galveston Bay Processing Corporation, a Delaware
corporation (herein called "Processor") and Southern Producer Services, L.P.
(herein called "Owner"), a Delaware limited partnership, sets forth the terms
and conditions of the separation, stabilization and handling of liquid
hydrocarbons (herein called "Condensate"), the treating and dehydration of
natural gas (herein called "Gas") for the removal and disposal of CO(2), H(2)S,
water and other impurities (the CO(2), H(2)S, water and other impurities from
such Gas herein, collectively called "By-Products"), to be performed by
Processor at Processor's facility (herein called the "Winnie Facility"), located
at Winnie, Jefferson County, Texas, as more fully described in Exhibit B,
attached hereto and made a part hereof.

                                   WITNESSETH:

         WHEREAS, TransTexas Gas Corporation (herein called "TransTexas"), a
Delaware corporation and 100% owner of Processor, and Processor have heretofore
entered into that certain Natural Gas Treating and Condensate handling Agreement
dated as of October 18, 1998, whereby Processor has agreed to separate,
stabilize and handle certain volumes of liquid hydrocarbons of TransTexas and
treat and dehydrate certain volumes of natural Gas of TransTexas;

         WHEREAS, TransTexas has heretofore filed for protection under Chapter
11 of the Bankruptcy Code in Case No. 99-21550 in the United States Bankruptcy
Court (herein called the "Court") for the Southern District of Texas (Corpus
Christi Division), entitled "In re: TransTexas Gas Corporation, et. al." (herein
called the "Bankruptcy Case");

         WHEREAS, pursuant to the Bankruptcy Case, the Court has issued an order
(herein called the "Bankruptcy Order") granting TransTexas' motion for
permission to (1) sell the Production Payment (as hereinafter defined) and enter
into and deliver to Grantee (as hereinafter defined) the Conveyance (as
hereinafter defined) and other ancillary marketing, transportation and
processing agreements and (2) amend or amend and restate and affirm certain
existing marketing, transportation and processing agreements with third parties
in order to relinquish certain of TransTexas' capacity under such existing
marketing, transportation and processing agreements as is required for Owner to
market, transport and/or process the Production Payment hydrocarbons that Owner
and Fund V (as hereinafter defined) and Fund VI (as hereinafter defined) own or
control and such other volumes of hydrocarbons as Owner shall purchase from
TransTexas or other third parties;

         WHEREAS, pursuant to the Bankruptcy Order, TransTexas and Grantee have
entered into that certain Production Payment Conveyance (herein, as from time to
time amended, restated or otherwise modified, called the "Conveyance"), dated as
of March 14, 2000, from and by TransTexas, as grantor, and Owner, TCW Portfolio
No. 15555 DR V Sub-Custody Partnership, L.P. (herein called "Fund V") and TCW DR
VI Investment Partnership, L.P. (herein called "Fund VI") (in such

<PAGE>   3

capacity, Fund VI together with Owner and Fund V, called the "Grantee"), whereby
TransTexas has granted, bargained, sold, conveyed, assigned, transferred, set
over and delivered to Grantee a term overriding royalty interest (herein called
the "Production Payment") in the Subject Interests (as defined in the Conveyance
and herein so called);

         WHEREAS, pursuant to the terms of the Conveyance, production from the
Subject Interests shall be dedicated to the Grantee as (1) at fifty percent
(50%) from March 1, 2000 until 9:00 a.m., Central Time, on September 1, 2000,
(2) at sixty-two percent (62%) from 9:00 a.m., Central Time, on September 1,
2000 until 9:00 a.m., Central Time, on March 1, 2001 and (3) seventy percent
(70%) from and after 9:00 a.m., Central Time, on March 14, 2001 until the
Termination Time (herein called the "Dedication Percentage");

         WHEREAS, pursuant to the Bankruptcy Order, TransTexas and Grantee have
entered into that certain Purchase Agreement (as defined in the Purchase
Agreement and herein, as from time to time amended, restated, supplemented or
otherwise modified, called the "Purchase Agreement"), dated as of March 14,
2000, between TransTexas and Grantee and TCW Asset Management Company, as agent
on behalf of Fund V and Fund VI (herein called the "Funds Agent"), whereby
TransTexas has sold the first component of the Production Payment to Grantee
pursuant to the Conveyance, and Grantee has purchased the same from TransTexas;

         WHEREAS, the Grantee and Owner have entered into that certain
Production Sales Agreement (as defined in the Purchase Agreement and herein, as
from time to time amended, restated, supplemented or otherwise modified, called
the "Production Sales Agreement"), dated as of March 14, 2000, pursuant to which
Owner has agreed to purchase, and Grantee has agreed to sell, Grantee's interest
in the Production Payment hydrocarbons;

         WHEREAS, TransTexas and Owner have entered into those certain
TransTexas Marketing Agreements (as defined in the Purchase Agreement and
herein, as from time to time amended, restated supplemented or otherwise
modified, called the "TransTexas Marketing Agreements"), dated as of March 14,
2000, whereby TransTexas has agreed to sell and Owner has agreed to purchase,
those net volumes of hydrocarbons produced from the Subject Interests that
TransTexas owns, controls or has the right to sell and which have not been made
subject to the Production Payment and Conveyance;

         WHEREAS, Owner desires Processor to separate, stabilize and handle all
volumes of Condensate, and dehydrate and treat all volumes of Gas, that Owner
owns or controls and delivers to Processor; and

         WHEREAS, Processor agrees, subject to the terms of this Agreement, to
accept all volumes of Condensate and Gas which Owner owns or controls and
delivers to Processor at Processor's Winnie Facility and to cause such
Condensate to be separated, stabilized and handled and to dehydrate and treat
such Gas for benefit of Owner;

                                        2

<PAGE>   4

         NOW, THEREFORE, in consideration of the premises and mutual covenants
herein set forth, Processor and Owner hereby agree and covenant as follows:

                                    ARTICLE I
                                   DEFINITIONS

1.1      The following terms (whether or not underscored) when used in this
         Agreement, including its preamble, recitals, exhibits and schedules
         shall have the following meanings (such definitions to be equally
         applicable to the singular and plural forms thereof):

         The term "Agreement" is defined in the Preamble.

         The term "Agreed Rate" is defined in the Conveyance.

         The term "Bankruptcy Case" is defined in the second recital.

         The term "Bankruptcy Order" is defined in the third recital.

         The term "By-Products" is defined in the preamble.

         The term "CERCLA" means the Comprehensive Environmental Response,
         Compensation and Liability Act of 1980, as amended.

         The term "Condensate" is defined in the preamble.

         The term "Conveyance" is defined in the fourth recital.

         The term "Court" is defined in the second recital.

         The term "Dedication Percentage" is defined in the fifth recital

         The term "Eagle Bay Field" is defined in the Purchase Agreement.

         The term "Environmental Laws" means all applicable federal, state or
         local statutes, laws, ordinances, codes, rules, regulations and
         guidelines (including consent decrees and administrative orders)
         relating to public health and safety and protection of the environment,
         including, without limitation, CERCLA and RCRA.

         The term "force majeure" is defined in Section 10.3.

         The term "Fund V" is defined in the fourth recital.

         The term "Fund VI" is defined in the fourth recital.

                                        3

<PAGE>   5

         The term "Funds Agent" is defined in the sixth Recital.

         The term "Gas" is defined in the Preamble.

         The term "Grantee" is defined in the fourth recital.

         The term "Grantor" is defined in the fourth recital.

         The term "Hazardous Materials" means (a) any "hazardous substance," as
         defined by CERCLA; (b) any "hazardous waste," as defined by the
         Resource Conservation and Recovery Act, as amended (herein called
         "RCRA"); or (c) any pollutant or contaminant or hazardous, dangerous or
         toxic chemical, material or substance within the meaning of any other
         applicable federal, state or local law, regulation, ordinance or
         requirement (including consent decrees and administrative orders)
         relating to or imposing liability or standards of conduct concerning
         any hazardous, toxic or dangerous waste, substance or material, all as
         amended or hereafter amended.

         The term "Indemnified Amounts" is defined in Section 7.2.

         The term "Indemnified Party" is defined in Section 7.2.

         The term "Owner" is defined in the preamble.

         The term "Person" means an individual, corporation, partnership,
         limited liability company, association, joint stock company, trust or
         trustee thereof, estate or executor thereof, unincorporated
         organization or joint venture, court or governmental unit or any agency
         or subdivision thereof, or any other legally recognizable entity.

         The term "Production Payment" is defined in the fourth recital.

         The term "Processor" is defined in the preamble.

         The term "Production Sales Agreement" is defined in the seventh
         recital.

         The term "Purchase Agreement" is defined in sixth recital

         The term "RCRA" is defined in the definition of the term "Hazardous
         Material".

         The term "Subject Interests" is defined in the fourth recital.

         The term "Termination Time" is defined in the Conveyance.

         The term "TransTexas" is defined in the first recital.

                                        4

<PAGE>   6

         The term "TransTexas Marketing Agreements" is defined in the eighth
         recital.

         The term "TransTexas Party" means TransTexas, each subsidiary of
         TransTexas (including, without limitation, Processor) any Person of
         which TransTexas is at the time in question a Subsidiary and any other
         Subsidiary of any such Person.

         The term "Winnie Facility" is defined in the preamble.

1.2      All references herein to any document or instrument refer to the same
         as from time to time amended, supplemented, restated or otherwise
         modified.

1.3      Unless the context of this Agreement clearly requires otherwise, (a)
         pronouns, wherever used herein, and of whatever gender, shall include
         natural persons and corporations and associations of every kind and
         character, (b) the singular shall include the plural and the plural
         shall include the singular wherever and as often as may be appropriate,
         (c) the word "includes" or "including" shall mean "including without
         limitation", and (d) the words "hereof", "herein", "hereunder", and
         similar terms in this Agreement shall refer to this Agreement as a
         whole and not any particular section or article in which such words
         appear. The section, article and other headings in this Agreement are
         for reference purposes and shall not control or affect the construction
         of this Agreement or the interpretation hereof in any respect. Article,
         section, subsection, schedule and exhibit references are to this
         Agreement unless otherwise specified.

                                   ARTICLE II
                        TREATING AND DEHYDRATION OF GAS,
                      SEPARATION AND HANDLING OF CONDENSATE

2.1      Owner has entered or will enter into various agreements relating to the
         purchase of Gas and Condensate and the transportation, processing
         and/or sales of Gas and Condensate that Owner owns, controls or has the
         right to sell. Owner has or will have the right under said agreements
         to bring such Gas and Condensate into Processor's facility at Winnie,
         Texas (herein called the "Winnie Facility") for separation and
         stabilization of such Condensate, the dehydration and treatment of such
         Gas and for the removal of By-Products therefrom and to accept
         redelivery of such dehydrated and treated Gas into the Centana
         Intrastate Pipeline Company's ("CIPCO") pipeline connected to the
         Winnie Facility (or such other pipeline as Owner may designate from
         time to time), and to accept redelivery of such separated and
         stabilized Condensate into the Sun Pipeline Company's (herein called
         "Sun") pipeline connected to the Winnie Facility (or such other
         pipeline as Owner may designate from time to time).

2.2      Processor agrees to receive daily, subject to all the provisions of
         this Agreement, all of the Gas and Condensate that Owner may deliver or
         cause to be delivered to the Winnie Facility,

                                        5

<PAGE>   7

         which Gas and Condensate is produced from the Subject Interests.
         Processor shall cause such Condensate to be separated from the
         associated Gas and water, stabilized, and stored, if required, on
         behalf of Owner, and Processor shall deliver the stabilized Condensate
         to Owner, or its designee, at the tailgate of the Winnie Facility at
         the interconnection to Sun's pipeline at Meter Stations Number 900, 901
         and 902 (or such other pipeline as Owner may designate from time to
         time), all subject to Article III hereof. Processor shall also
         dehydrate and treat Owner's Gas stream for the removal of water,
         hydrogen sulfide and carbon dioxide and deliver such treated Gas to
         Owner, or its designee downstream of the tailgate of the Winnie
         Facility at the interconnection to CIPCO's pipeline at Meter Stations
         Number 77565- 01, 77565-02 and 77567-01 (or such other pipeline as
         Owner may designate from time to time), or at other delivery points as
         may be mutually agreed to by Processor and Owner from time to time. The
         separation, stabilization, dehydration and treatment of said Condensate
         and Gas shall be performed by Processor and shall meet the delivery
         specifications (including, without limitation, as to chemical
         composition, water content, and delivery pressures) set by each of the
         pipeline transporters or purchasers currently receiving Owner's volumes
         of Gas and Condensate at the tailgate of the Winnie Facility. Processor
         shall remove the associated water and By-Products from Owner's
         Condensate and Gas and shall dispose of said associated water and
         By-Products in accordance with all rules, regulations, and laws as may
         be required by any governmental authorities.

2.3      To induce Owner to enter into this Agreement, the Purchase Agreement,
         the Conveyance, the TransTexas Marketing Agreements and the Production
         Sales Agreement, Processor covenants and agrees that until the
         termination of this Agreement, the Purchase Agreement, the Conveyance,
         the TransTexas Marketing Agreements and the Production Sales Agreement:

         (a)      Processor will not cause or permit the Winnie Facility to be
                  in violation of any Environmental Laws pertaining thereto or
                  do anything or permit anything to be done which will subject
                  the Winnie Facility to any remedial obligations under any
                  Environmental Laws pertaining thereto, and Processor will
                  promptly notify Owner in writing of any existing, pending or,
                  threatened investigation or inquiry by any private party or
                  governmental authority in connection with any Environmental
                  Laws. Processor will take all steps necessary to determine
                  that no Hazardous Materials are disposed of or otherwise
                  released or being released on or to the Winnie Facility in
                  violation of any Environmental Laws. Processor will not cause
                  or permit the disposal or other release of any Hazardous
                  Materials on or to the Winnie Facility in violation of any
                  Environmental Law and covenants and agrees to remove or
                  remediate any Hazardous Materials on the Winnie Facility;

         (b)      Processor will at all times be a corporation validly existing
                  and in good standing under the laws of its state of
                  incorporation and duly qualified to do business and in good
                  standing in the State of Texas;

                                        6

<PAGE>   8

         (c)      Processor will at all times obtain and possess (or cause to be
                  obtained and possessed) all material consents, permits,
                  approvals, authorizations and waivers necessary under any
                  contract, indenture, instrument or agreement binding on or
                  affecting Processor or the Winnie Facility or under any
                  provision of law, rule, regulation, order, writ, judgment,
                  decree, determination or award binding on or affecting the
                  Processor, in order to permit the performance by Processor of
                  this Agreement;

         (d)      Processor will not, without the prior written consent of the
                  Owner (which consent shall not be unreasonably withheld),
                  enter into any agreement selling, transferring or encumbering
                  the Winnie Facility; provided, however, that any such
                  agreement shall expressly provide that the parties thereto
                  agree to be bound by all of the terms of this Agreement;
                  provided further that nothing herein shall be deemed to
                  prohibit mortgages, security interests or similar encumbrances
                  on the real or personal property owned by Processor, nor any
                  exercise of remedies by the mortgagee or secured party
                  thereunder so long as any mortgage, security agreement or
                  similar agreement encumbering the Winnie Facility expressly
                  provides that the parties thereto (and any purchaser at
                  foreclosure) agree to be bound by all of the terms of this
                  Agreement;

         (e)      Processor will file all tax returns which are required to be
                  filed by it and will pay or provide for the payment before the
                  same becomes delinquent all taxes due pursuant to such returns
                  or pursuant to any assessment received by Processor;

         (f)      Processor will furnish to Owner, promptly upon receipt and in
                  any event not later than ten (10) days following such receipt,
                  any information concerning any actions, suits or proceedings
                  by or before any court, arbitrator or any governmental
                  commission, board, bureau or other administrative agency
                  pending or threatened, against Processor, any subsidiary of
                  Processor or the Winnie Facility that could reasonably be
                  expected to have a material adverse effect on Processor,
                  including, without limitation, any foreclosure proceedings;

         (g)      Processor will cause the Winnie Facility to be maintained and
                  continuously operated for the dehydration and treatment of
                  Gas, the stabilization and separation of Condensate, the
                  removal of By-Products and the disposal of water in a good and
                  workmanlike manner and in a manner so as to meet the delivery
                  specifications (including, without limitation, as to chemical
                  composition, water content, and delivery pressure) set by each
                  of the current pipeline transporters or purchasers receiving
                  Owner's volumes of Gas and Condensate at the tailgate of the
                  Winnie Facility as would a prudent operator, all in accordance
                  with generally accepted standards and practices, applicable
                  agreements and in material compliance with all applicable
                  federal, state and local laws, rules and regulations
                  (including, without limitation, all Environmental Laws);

                                        7

<PAGE>   9

         (h)      Processor will give prompt notice to the Owner of any default,
                  including, without limitation, any notice of any default
                  received by the Processor on or subsequent to the date of this
                  Agreement, under any instrument or agreement relating to the
                  Winnie Facility to which the Processor is a party or by which
                  the Processor is bound, which default could reasonably be
                  expected to have a material adverse effect on Processor; and

         (i)      Processor will not sell, transfer or encumber or create any
                  mortgage, pledge, title retention lien, or other lien,
                  encumbrance or security interest with respect to any of the
                  Condensate or Gas of Owner.

                                   ARTICLE III
                        ALLOCATION OF GAS AND CONDENSATE

3.1      Condensate and Gas shall be allocated to Owner, or Owner's designee, on
         the same basis as Owner's ownership portion of the total stream flowing
         through the Winnie Facility. Condensate measurement by Sun (or Sun's
         successor or permitted assign) will be used by Processor for all
         Condensate fees provided for under this Agreement. Owner agrees to
         accept Sun's Condensate measurement for the appropriate allocation of
         its tailgate Condensate volumes. Gas measured by Tejas Ship Channel,
         LLC at the applicable meters will be used by Processor for all Gas fees
         provided for under this Agreement; however, Owner agrees to accept
         CIPCO's (or CIPCO's successor or permitted assign) Gas measurement for
         the appropriate allocation of its tailgate Gas volumes. The pro-rata
         volume of water produced as a By-Product of the dehydration and
         treatment of Owner's portion of the Gas relative to total volume of
         water produced as a By-Product of the dehydration and treatment of the
         total stream of Gas flowing through the Winnie Facility as measured by
         Processor or Processor's agent at the Winnie Facility, will be used for
         the application of disposal fees for such water under this Agreement.

3.2      Should conditions exist at any time that in Processor's reasonable and
         prudent judgment, exercised in good faith, create a capacity bottleneck
         or unsafe operating situation as to pipeline pressure or any other
         operating condition at the Winnie Facility, Processor shall have the
         option to request that TransTexas (with a copy of such notice
         simultaneously delivered to Owner) restrict the production from
         TransTexas' wells. TransTexas agrees that it shall immediately comply,
         to the fullest extent reasonably possible, with Processor's request and
         restrict production until such time that, in Processor's reasonable and
         prudent judgment, exercised in good faith, the capacity bottleneck or
         unsafe conditions no longer exist. In the event Owner's Gas and
         Condensate is restricted due to capacity bottleneck or unsafe pipeline
         pressure, Owner will have the right to take and sell its Gas and
         Condensate by whatever means Owner deems prudent. If Owner continues to
         deliver all or a portion of its Gas and Condensate to Processor's
         Winnie Facility while the facility is experiencing a capacity
         bottleneck, subject to and as further clarified in the subsequent
         sentences in this

                                        8

<PAGE>   10

         Section 3.2, Owner will be allocated a pro-rata portion of the capacity
         of the facility in the same relationship that Owner's deliverability
         bears to the total deliverability of all shippers having the right to
         move that production through the Winnie Facility. As of the date
         hereof, Schedule 3.2 hereto is a true and correct list of persons
         having a right to move production through Processor's Winnie Facility,
         which right is based on such persons percentage of ownership or control
         of the Eagle Bay Field (as defined in the Purchase Agreement), and the
         volumetric allocation of each such person with respect to Gas,
         Condensate and produced water. Processor agrees to give priority in
         allocating capacity, to the extent permitted by law and applicable
         contracts existing prior to March 1, 2000, first to volumes of Gas,
         Condensate and water produced from the Subject Interests (as defined in
         the Conveyance) and then to volumes of Gas, Condensate and water
         produced from wells other than the Subject Interests. Processor further
         agrees that any agreement to stabilize, separate, dehydrate or treat
         additional volumes of Gas or Condensate at Processor's Winnie Facility
         (other than those described on Schedule 3.2 to this Agreement), shall
         be of no force and effect unless such agreement is expressly made
         subject to the terms of this Section 3.2 concerning the first priority
         rights of Owner.

                                   ARTICLE IV
                               BILLING AND PAYMENT

4.1      On or before the tenth (10th) day of each month, Processor shall tender
         to Owner a statement for the actual service rendered (including the
         costs of disposal of water produced as a By- Product of dehydration and
         treatment of Owner's Gas as referenced in Sec. 5.3 below) during the
         preceding month if actual data is available. If actual data is not
         available, billing will be on an estimated basis and such estimate will
         be adjusted to actual totals on the billing immediately following
         receipt of such actual data.

4.2      Owner shall pay Processor by wire transfer, to any banks and accounts
         from time to time specified by Seller in writing, no later than the
         thirtieth (30th) day of the month following the month in which such
         actual services were provided; provided, however, Owner shall not be
         required to pay any such invoice earlier than twenty (20) days
         following receipt of such invoice, according to instructions on the
         invoice.

4.3      Should Owner fail to pay the amount of any bill tendered by Processor
         when such amount is due, interest shall accrue thereon until paid, at
         the lesser of (i) the then-effective prime rate of interest established
         from time to time by Wells Fargo Bank, Houston, Texas, plus five
         percent (5%) or (ii) the Agreed Rate, computed on an annualized basis
         and compounded monthly, not to exceed the maximum rate of interest
         permitted by applicable law.

4.4      In the event of an overbilling error, the amount of such error shall be
         adjusted within thirty (30) days after discovery of such error,
         provided that the claim of such error was made within two (2) years
         from the date such bill was received by Owner.

                                        9

<PAGE>   11

4.5      Owner shall have the right to examine during normal business hours, the
         books and records of Processor to the extent necessary to verify the
         accuracy of any bill tendered for services performed under this
         Agreement.

                                    ARTICLE V
                               RATES FOR SERVICES

5.1      For the Condensate separation, stabilization, storage and distribution
         services provided by Processor at its Winnie Facility, Owner shall pay
         to Processor a fee of $1.20 per stabilized barrel for Owner's portion
         of the Condensate allocation referenced in Articles II and III above
         that is actually stabilized, treated and delivered to and accepted by
         Owner or Owner's designee.

5.2      For the Gas dehydration and treating performed by Processor at its
         Winnie Facility, Owner shall pay Processor a fee of $.175 per Mcf for
         Owner's portion of the Gas measured at the applicable meter referenced
         in Article III above and actually delivered to and accepted by Owner or
         Owner's designee.

5.3      Owner shall pay to Processor a disposal fee of $1.00 per barrel for
         Owner's portion of any water produced as a By-Product of the
         dehydration and treatment of Owner's Gas and measured and disposed of
         by Processor at the Winnie Facility.

                                   ARTICLE VI
                                      TERM

         This Agreement shall be effective as of March 1, 2000, and shall remain
in full force and effect for a term equal to the greater of (i) the term of the
Production Payment or (ii) the TransTexas Marketing Agreements.

                                   ARTICLE VII
                           LIABILITIES AND INDEMNITIES

7.1      Each party shall protect, indemnify and save the other party hereto
         harmless from and against all claims, demands and causes of action of
         every kind and character for injury to or death of the indemnifying
         party's own employees or invitees, and for all damage or loss of
         property of indemnifying party's own employees, arising directly or
         indirectly out of the performance by the indemnifying party of this
         Agreement from any cause, other than injury, death or damage caused by
         gross negligence or willful misconduct of the other party. Employees of
         contractors or subcontractors of Owner shall be considered invitees of
         Owner. Employees of contractors or subcontractors of Processor shall be
         considered invitees of Processor.

                                       10

<PAGE>   12

         Notwithstanding anything herein to the contrary, Owner assumes all risk
         and agrees to protect, indemnify and save Processor harmless from and
         against all costs, expenses, claims, demands and causes of action for
         personal injury, death or property damage, excluding costs, expenses,
         claims, demands and causes of action arising directly or indirectly out
         of the gross negligence or wilful misconduct of Processor, in
         connection with exercise of Owner's rights under Section 10.5.

7.2      In addition to, and without limiting any other rights or remedies which
         Owner and each Grantee may have hereunder or under applicable law, the
         Processor hereby agrees to indemnify Owner, each Grantee and each of
         their respective officers, directors, employees, members, agents and
         representative s (herein collectively the "Indemnified Parties" or
         individually an "Indemnified Party") and to exonerate, and hold each
         Indemnified Party harmless from and against, any and all actions,
         causes of action, suits, costs, expenses, damages, losses, claims,
         liabilities (including, but not limited to, fines, penalties and
         interest) and related costs and expenses (irrespective of whether any
         Indemnified Party is a party to the action for which indemnification is
         sought), including attorneys' fees and expenses incurred by any
         Indemnified Party in enforcing Processor's obligations hereunder (all
         of the foregoing being collectively referred to as the "Indemnified
         Amounts") awarded against or incurred by any Indemnified Party arising
         out of, relating to or as a result of, any one or more of the following
         occurring after scheduled deliveries to Processor's Winnie Facility and
         prior to redelivery of treated volumes at the tailgate of Processor's
         Winnie Facility to Owner or Owner's designee: (i) any Environmental Law
         applicable to Processor or any of its properties or the Winnie
         Facility, including without limitation, the treatment or disposal of
         Hazardous Materials on or at any of the properties owned or operated by
         Processor, (ii) the presence, use, release, storage, treatment or
         disposal of Hazardous Materials on or at any of the properties owned or
         operated by Processor, (iii) any other environmental, health or safety
         condition in connection with this Agreement or the Winnie Facility,
         (iv) failure to deliver Gas or Condensate which meets the delivery
         specifications set by any of Owner's current pipeline transporters or
         purchasers receiving volumes at the tailgate of Processor's Winnie
         Facility or (v) failure to pay any taxes, governmental charges,
         assessments or other costs or expenses applicable to the dehydration
         and treatment of Gas and the stabilization and separation of Condensate
         delivered by Owner to Processor; provided, however, that (except as
         specifically otherwise provided herein) the Processor shall not be
         obligated to indemnify any Indemnified Party for any Indemnified Amount
         to the extent that a court of competent jurisdiction determines that
         such Indemnified Amount resulted from the gross negligence or willful
         misconduct of such Indemnified Party; but in no event will this
         restrict or limit the obligations undertaken hereunder to the other
         Indemnified Parties if such other Indemnified Parties are not jointly,
         concurrently or derivatively liable for such gross negligence or
         willful misconduct. THE INDEMNITIES BY THE PROCESSOR IN FAVOR OF THE
         INDEMNIFIED PARTIES IN THIS SECTION 7.2 SHALL BE APPLICABLE
         NOTWITHSTANDING THAT AN INDEMNIFIED AMOUNT OTHERWISE COVERED BY THIS
         SECTION 7.2 IS ATTRIBUTABLE TO THE NEGLIGENCE (OTHER THAN GROSS
         NEGLIGENCE OR WILLFUL MISCONDUCT) OF AN

                                       11

<PAGE>   13

         INDEMNIFIED PARTY (WHETHER SUCH NEGLIGENCE IS SOLE, JOINT, CONCURRENT,
         ACTIVE OR PASSIVE), ANY PRE-EXISTING CONDITION OR DEFECT OR ANY FORM OF
         STRICT LIABILITY.

         If any action or proceeding is brought against any Indemnified Party
         with respect to which indemnity may be sought from the Processor
         pursuant to this Section 7.2, or any Indemnified Party receives notice
         from any potential claimant that such Indemnified Party reasonably
         believes will result in the commencement against such Indemnified Party
         of any such action or proceeding, such Indemnified Party shall, as
         promptly as practicable after receiving notice thereof, give notice to
         the Processor of the commencement of such action or proceeding or of
         the existence of any such claim (and furnish the Processor with copies
         of any summons or other legal process received by such Indemnified
         Party and other documents and information in the possession of such
         Indemnified Party as to the nature and basis of the claim); provided
         that no failure to give or delay in giving such notice or such
         documents and information shall relieve the Processor from any of its
         indemnification obligations hereunder.

         Any amount payable under the indemnification provisions of this Section
         7.2 shall be paid by the Processor to Owner for the account of the
         appropriate Indemnified Party within thirty (30) days following such
         Indemnified Party's demand therefor given in writing to the Processor
         with a copy to Owner. The obligations of the Processor to indemnify the
         Indemnified Parties pursuant to this Section 7.2 shall survive the
         termination of this Agreement.

7.3      Processor agrees with Owner that Gas and Condensate delivered hereunder
         by Owner is delivered as is and without any representations or
         warranties of any kind. Processor further agrees with Owner that Owner
         and each of its respective officers, directors, employees, members,
         agents and representatives shall not be liable to any TransTexas Party
         for any costs, expenses, damages, losses, claims, liabilities
         (including, but not limited to, attorney's fees, fines, penalties and
         interest) of any kind arising from or in any way related to (including,
         without limitation, failure to deliver Gas or Condensate and delivery
         of Gas or Condensate which fails to meet any specification of
         Processor) the delivery of or stabilization, dehydration, treatment or
         separation of, Owner's Gas or Condensate at Processor's Winnie
         Facility.

                                  ARTICLE VIII
                         REPRESENTATIONS AND WARRANTIES

8.1      The Processor is a corporation duly organized, validly existing and in
         good standing under the laws of the State of Delaware, is duly
         qualified to do business and is in good standing under the laws of the
         State of Texas and in each other state where its failure to be so
         qualified or in good standing would have a material adverse effect on
         its ability to perform its obligations hereunder or to make any payment
         required hereunder and the Processor has the

                                       12

<PAGE>   14

         corporate power to enter into and perform this Agreement and to perform
         its obligations hereunder.

8.2      The making and performance by the Processor of this Agreement have been
         duly authorized by all necessary corporate action and will not (a)
         violate any provision of its certificate of incorporation or by-laws,
         or any provision of law applicable to the Processor or by which it or
         its property may be bound, (b) result in the breach of or constitute a
         default or require any consent (other than any consent previously
         obtained) under, or result in the creation of any security interest,
         lien, charge or encumbrance upon any property or assets of the
         Processor pursuant to any indenture, agreement or instrument to which
         the Processor is a party or by which the Processor's property or
         business is bound, which breach, default or lack of consent could have
         a material adverse effect on the Processor's ability to perform its
         obligations hereunder or (c) require any license, consent or approval
         of any governmental agency or regulatory authority, other than
         licenses, consents and approvals that have previously been obtained.
         This Agreement has been duly executed and delivered by the Processor
         and constitutes its legal, valid and binding obligation, enforceable in
         accordance with its terms, except as such enforceability may be limited
         by (a) bankruptcy, insolvency, reorganization, moratorium or similar
         laws of general applicability affecting the enforcement of creditor's
         rights and (b) the application of general principles of equity
         (regardless of whether such enforceability is considered in a
         proceeding in equity or at law).

8.3      The Owner is a limited partnership duly organized, validly existing and
         in good standing under the laws of the State of Delaware, is duly
         qualified to do business and is in good standing under the laws of the
         State of Texas as a foreign limited partnership and in each other state
         where its failure to be so qualified or in good standing would have a
         material adverse effect on its ability to perform its obligations
         hereunder or to make any payment required hereunder and the Owner has
         the partnership power to enter into and perform this Agreement and to
         perform its obligations hereunder.

8.4      The making and performance by the Owner of this Agreement have been
         duly authorized by all necessary partnership action and will not (a)
         violate any provision of its certificate of limited partnership,
         partnership agreement, or any other document chartering Owner or
         governing its business activities, or any provision of law applicable
         to the Owner or by which it or its property may be bound, (b) result in
         the breach of or constitute a default or require any consent (other
         than any consent previously obtained) under, or result in the creation
         of any security interest, lien, charge or encumbrance upon any property
         or assets of the Owner pursuant to any indenture, agreement or
         instrument to which the Owner is a party or by which the Owner's
         property or business is bound, which breach, default or lack of consent
         would have a material adverse effect on the Owner's ability to perform
         its obligations hereunder or (c) require any license, consent or
         approval of any governmental agency or regulatory authority, other than
         licenses, consents and approvals that have previously been obtained.
         This Agreement has been duly executed and delivered by the Owner and
         constitutes its legal, valid and binding obligation, enforceable in
         accordance with its terms,

                                       13

<PAGE>   15

         except as such enforceability may be limited by (a) bankruptcy,
         insolvency, reorganization, moratorium or similar laws of general
         applicability affecting the enforcement of creditor's rights and (b)
         the application of general principles of equity (regardless of whether
         such enforceability is considered in a proceeding in equity or at law).

8.5      Attached hereto as Exhibit B are true and correct meets and bounds
         descriptions for the Winnie Facility.

                                   ARTICLE IX
                                     NOTICES

         All notices, requests, statements, or other communications provided for
(other than billing invoices) shall be in writing and shall be deemed to have
been properly served when sent by mail or telecopy to the address of the parties
hereto, which are as follows:

PROCESSOR

All Notices:                   Galveston Bay Processing Corporation
                               1300 North Sam Houston Parkway East, Suite 340
                               Houston, Texas  77032-2949
                               Attention: Contract Administration
                               Telephone:       (281) 987-8600
                               Facsimile:       (281) 986-8840

OWNER

All Notices:                   Southern Producer Services, L.P.
                               1200 Smith Street, Suite 2890
                               Houston, Texas  77002
                               Attention: David W. Stewart
                               Telephone:       (713) 276-1902
                               Facsimile:       (713) 276-1990

         Either party may change the above address upon written notification to
the other party.

                                    ARTICLE X
                                  MISCELLANEOUS

10.1     THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH
         THE LAWS OF THE STATE OF TEXAS WITHOUT REGARD TO THE PRINCIPLES OF
         CONFLICT OF LAWS.

                                       14

<PAGE>   16

10.2     This Agreement shall inure to and be binding upon the successors and
         assigns of the assigning Parties. The rights of Owner under this
         Agreement may be transferred or assigned in whole or in part, but any
         such transfer or assignment shall be expressly made subject to the
         provisions of this Agreement; provided, however, that (a) no such
         transfer or assignment shall be binding on Processor until the Owner
         has provided to Processor a copy of the fully executed instrument of
         transfer; (b) any such assignee shall agree in writing to be bound by
         the terms and conditions hereof; and (c) such transfer or assignment
         shall relieve the Owner of responsibility and liability for any
         obligations and liabilities arising under the terms of this Agreement
         after the effective date of the transfer.

10.3     The term "force majeure", as employed herein, shall mean acts of God;
         strikes, lockouts or other industrial disturbances; acts of the public
         enemy, wars, blockades, insurrections, civil disturbances and riots,
         and epidemics; landslides, lightning, earthquakes, fires, storms,
         hurricanes and threats of hurricanes, floods and washouts; arrests,
         orders, requests, directives, restraints and requirements of the
         government and governmental agencies, either federal or state, civil
         and military; any application of governmental conservation or
         curtailment rules and regulations; outages (including, without
         limitation, planned or unplanned shutdowns) or failure with respect to
         any third party transporting or processing Gas and/or Condensate for
         Owner or purchasing Gas and/or Condensate from Owner if caused by an
         event of force majeure with respect to such third party; explosions,
         breakage or failure of machinery, equipment or lines of pipe; outages
         (including, without limitation, planned or unplanned shutdowns) of
         equipment, machinery or lines of pipe for inspection, maintenance or
         repair; freezing of wells or lines of pipe; premature, partial or
         entire failure of natural Gas wells, Gas supply or depletion of Gas
         reserves; any of the foregoing events or circumstances to the extent
         such event or circumstance affects Processor's treating plant, if any;
         and other causes of a similar nature not reasonably within the control
         of the party claiming suspension. Force majeure shall likewise include
         (a) in those instances where either party hereto is required to obtain
         servitudes, right-of-way grants, permits or licenses to enable such
         party to fulfill its obligations hereunder, the inability of such party
         to acquire, or the delays on the part of such party in acquiring, at
         reasonable cost and after the exercise of reasonable diligence, such
         servitudes, right-of-way grants, permits or licenses; and (b) in those
         instances where either party hereto is required to furnish materials
         and supplies for the purpose of constructing or maintaining facilities
         or is required to secure permits or permissions from any governmental
         agency to enable such party to fulfill its obligations hereunder, the
         inability of such party to acquire or the delays on the part of such
         party in acquiring, at reasonable cost and after the exercise of
         reasonable diligence, such materials and supplies, permits and
         permissions.

10.4     It is understood and agreed that the settlement of strikes or lockouts
         shall be entirely within the discretion of the party having the
         difficulty, and the above-requirement of the use of diligence in
         restoring normal operating conditions shall not require the settlement
         of strikes or lockouts by acceding to the terms of the opposing party
         when such course is inadvisable in the discretion of the party having
         the difficulty.

                                       15

<PAGE>   17

10.5     Owner or its designee shall have access to Processor's facilities, upon
         at least 24 hours prior notice to Processor when such notice is
         practicable, to examine all pertinent equipment utilized in connection
         with Processor's operations at its Winnie Facility.

10.6     This Agreement contains the entire agreement between the parties with
         respect to the subject matter hereof, and there are no agreements,
         modifications, conditions or understandings, oral or written, expressed
         or implied, pertaining to the subject matter hereof which are not
         contained therein.

10.7     The Parties stipulate and agree that this Agreement shall be deemed and
         considered for all purposes as prepared through the joint effort of the
         Parties and shall not be construed against one Party or the other as a
         result of the preparation, submittal or other event of negotiation,
         drafting or execution hereof.

10.8     Modifications of this Agreement shall be or become effective only upon
         the due and mutual execution of appropriate supplemental agreements or
         amendments hereto by duly authorized representatives of the respective
         Parties.

10.9     The headings and subheadings contained in this Agreement are used
         solely for convenience and do not constitute a part of the Agreement
         between the Parties nor should they be used to aid in any manner in
         construing this Agreement.

10.10    ANY LITIGATION BASED HEREON, OR ARISING OUT OF, UNDER, OR IN CONNECTION
         WITH, THIS AGREEMENT, OR ANY COURSE OF CONDUCT, COURSE OF DEALING,
         STATEMENTS (WHETHER VERBAL OR WRITTEN) OR ACTIONS OF OWNER OR THE
         PROCESSOR MAY BE BROUGHT AND MAINTAINED IN THE COURTS OF THE STATE OF
         TEXAS OR IN THE UNITED STATES DISTRICT COURT FOR THE SOUTHERN DISTRICT
         OF TEXAS; PROVIDED, HOWEVER, THAT ANY SUIT SEEKING ENFORCEMENT AGAINST
         ANY PROPERTY MAY BE BROUGHT, AT OWNER'S OPTION, IN THE COURTS OF ANY
         JURISDICTION WHERE SUCH PROPERTY MAY BE FOUND. THE PROCESSOR HEREBY
         EXPRESSLY AND IRREVOCABLY SUBMITS TO THE JURISDICTION OF THE COURTS OF
         THE STATE OF TEXAS AND OF THE UNITED STATES DISTRICT COURT FOR THE
         SOUTHERN DISTRICT OF TEXAS FOR THE PURPOSE OF ANY SUCH LITIGATION AS
         SET FORTH ABOVE. THE PROCESSOR FURTHER IRREVOCABLY CONSENTS TO THE
         SERVICE OF PROCESS BY REGISTERED MAIL, POSTAGE PREPAID, OR BY PERSONAL
         SERVICE WITHIN OR WITHOUT THE STATE OF TEXAS. THE PROCESSOR HEREBY
         EXPRESSLY AND IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY
         LAW, ANY OBJECTION WHICH IT MAY HAVE OR HEREAFTER MAY HAVE TO THE
         LAYING OF VENUE OF ANY SUCH LITIGATION BROUGHT IN ANY SUCH COURT
         REFERRED TO ABOVE AND ANY CLAIM THAT ANY SUCH LITIGATION HAS BEEN
         BROUGHT IN AN

                                       16

<PAGE>   18

         INCONVENIENT FORUM. TO THE EXTENT THAT THE PROCESSOR HAS OR HEREAFTER
         MAY ACQUIRE ANY IMMUNITY FROM JURISDICTION OF ANY COURT OR FROM ANY
         LEGAL PROCESS (WHETHER THROUGH SERVICE OR NOTICE, ATTACHMENT PRIOR TO
         JUDGMENT, ATTACHMENT IN AID OF EXECUTION OR OTHERWISE) WITH RESPECT TO
         ITSELF OR ITS PROPERTY, THE PROCESSOR HEREBY IRREVOCABLY WAIVES SUCH
         IMMUNITY IN RESPECT OF ITS OBLIGATIONS UNDER THIS AGREEMENT.

10.11    PROCESSOR, OWNER AND EACH INDEMNIFIED PARTY HEREBY KNOWINGLY,
         VOLUNTARILY AND INTENTIONALLY WAIVE THEIR RESPECTIVE RIGHTS TO A TRIAL
         BY JURY IN RESPECT OF ANY LITIGATION BASED HEREON, OR ARISING OUT OF,
         UNDER, OR IN CONNECTION WITH, THIS AGREEMENT, OR ANY COURSE OF CONDUCT,
         COURSE OF DEALING, STATEMENTS (WHETHER VERBAL OR WRITTEN) OR ACTIONS OF
         OWNER, THE INDEMNIFIED PARTY OR THE PROCESSOR. EACH OF THE PROCESSOR,
         THE INDEMNIFIED PARTY AND OWNER ACKNOWLEDGES AND AGREES THAT IT HAS
         RECEIVED FULL AND SUFFICIENT CONSIDERATION FOR THIS PROVISION AND THAT
         THIS PROVISION IS A MATERIAL INDUCEMENT FOR SUCH PARTY'S ENTERING INTO
         THIS AGREEMENT AND THE TRANSTEXAS MARKETING AGREEMENTS.

10.12    This Agreement may be executed in any number of counterparts and by
         different parties hereto on separate counterparts, each of which when
         so executed and delivered shall be deemed to be an original, but all of
         which shall together constitute one and the same instrument. Any
         signature delivered by a party by facsimile transmission shall be
         deemed to be an original hereto.

10.13    The terms and provisions of this Agreement shall be deemed to be
         covenants running with the land and shall be binding upon and inure to
         the benefit of the parties and their respective successors and assigns,
         including, without limitation, all subsequent owners of all or any
         portion of the Winnie Facility.

                            [Signature pages follow]

                                       17

<PAGE>   19

         IN WITNESS WHEREOF, the parties have caused this Agreement to be
executed by their duly authorized officers as of the date first written above.

GALVESTON BAY PROCESSING                     SOUTHERN PRODUCER SERVICES, L.P.
CORPORATION
                                             By:   SC Ashwood Holdings, Inc., as
                                                   general partner

By:                                          By:
   -------------------------------               -------------------------------
Name:                                        Name:    Dave W. Stewart
Title:                                       Title:   Vice President

ACKNOWLEDGED AND AGREED TO:
TRANSTEXAS GAS CORPORATION

By:
   -------------------------------
Name:   Ed Donahue
Title:  Vice President

                                       S-1

<PAGE>   20

STATE OF TEXAS                    )
                                  )
COUNTY OF _______                 )

         The foregoing instrument was acknowledged before me on this ____ day of
_____________, 2000, by __________________, the ____________________ of
GALVESTON BAY PROCESSING CORPORATION, a Delaware corporation, on behalf of such
corporation.

         Witness my hand and official seal.

                                             -----------------------------------
                                             Notary Public

                                             Residing at _________ County, Texas

My commission expires:

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

                                       S-2

<PAGE>   21

STATE OF TEXAS                    )
                                  )
COUNTY OF ________                )

         The foregoing instrument was acknowledged before me on this ____ day of
_____________, 2000, by David W. Stewart, the Vice President of SC Ashwood
Holdings, Inc., a Delaware corporation, the general partner of Southern
Producers Services, L.P., on behalf of such corporation.

         Witness my hand and official seal.

                                             -----------------------------------
                                             Notary Public

                                             Residing at _________ County, Texas

My commission expires:

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

                                       S-3

<PAGE>   22

STATE OF TEXAS                    )
                                  )
COUNTY OF ________                )

         The foregoing instrument was acknowledged before me on this ____ day of
_____________, 2000, by Ed Donahue, the Vice President of TransTexas Gas
Corporation, a Delaware corporation, on behalf of such corporation.

         Witness my hand and official seal.

                                             -----------------------------------
                                             Notary Public

                                             Residing at _________ County, Texas

My commission expires:

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

                                       S-4

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