Document:

<PAGE>
                                                                    EXHIBIT 10.2

                               BANK OF TEXAS, N.A.
                          5956 Sherry Lane, Suite 1100
                               Dallas, Texas 75225

September 23, 2002

TOREADOR RESOURCES CORPORATION
TOREADOR EXPLORATION & PRODUCTION INC.
TOREADOR ACQUISITION CORPORATION
TORMIN, INC.
4809 Cole Avenue, Suite 108
Dallas, Texas 75205

         Re:      Fourth Amendment to Loan Agreement

Ladies and Gentlemen:

         This letter (this "Amendment") amends the loan agreement dated February
16, 2001, among TOREADOR RESOURCES CORPORATION, a Delaware corporation, TOREADOR
EXPLORATION & PRODUCTION INC., a Texas corporation, TOREADOR ACQUISITION
CORPORATION, a Delaware corporation, and TORMIN, INC., a Delaware corporation
(collectively "Borrowers"), and BANK OF TEXAS, NATIONAL ASSOCIATION ("Bank"), a
national banking association, as amended by the First Amendment dated November
8, 2001, a Second Amendment dated May 9, 2002, and a Third Amendment dated
August 1, 2002 (the "Loan Agreement"). Capitalized terms below have the meanings
assigned in the Loan Agreement.

1. Borrowing Base, Tranches, and Rates. (a) Effective as of the date of this
Amendment, Bank has set the Borrowing Base at $19,375,000.00, and the MCR will
continue at $150,000 per month, until reset by Bank in connection with the next
redetermination of the Borrowing Base. The next scheduled redetermination of the
Borrowing Base will be March 1, 2003.

                  (b) Subsection (a) of Section 1 of the Loan Agreement is
amended to eliminate the tranches and to modify the interest rates and thus to
read as follows:

                  "(a) Subject to the terms and conditions set forth in the Loan
         Agreement

<PAGE>

Toreador Resources Corporation, et al
September 23, 2002
Page 2 of 5

         and the other agreements, instruments, and documents executed and
         delivered in connection with the Loan Agreement (collectively the "Loan
         Documents"), Bank agrees to make a revolving loan in the face amount of
         $75,000,000.00 to Borrowers (the "Revolving Loan") on the terms set
         forth in the Revolving Promissory Note attached as Exhibit A to this
         Amendment (the "Revolving Note"), for the purposes set forth in the
         Loan Agreement. All amounts owed on the Revolving Loan shall bear
         interest from the date advanced until paid or until default or maturity
         at a fluctuating rate equal to the sum of the Stated Rate (as defined
         below), plus one percent (1.0%), but subject to the default rate set
         forth in the Revolving Note. The "Stated Rate" shall be equal to the
         greater of (i) the rate of interest per annum then most recently
         established by JP MORGAN CHASE BANK as its "prime rate" on commercial
         loans, or (ii) the sum of the rate of interest, then most recently
         published by The Wall Street Journal as the "federal funds" rate for
         reserves traded among commercial banks for overnight use, plus one half
         of one percent (0.5 %), both as published in the Money Rates section of
         The Wall Street Journal."

                  (c) Subsection (b) of Section 1 of the Loan Agreement is
amended to change the Borrowing Base and to eliminate the tranches and thus to
read as follows:

                           "(b) Subject to the terms and conditions of the Loan
         Agreement, Borrowers may borrow, repay, and reborrow on a revolving
         basis from time to time during the period commencing on the date hereof
         and continuing through 11:00 a.m. (Dallas, Texas time) on February 16,
         2006 (the "Termination Date"), such amounts as Borrowers may request
         under the Revolving Loan; provided, however, the total principal amount
         outstanding at any time shall not exceed the lesser of (i) the
         aggregate sums permitted under the Borrowing Base, which is set at
         $19,375,000.00 as of the date of this Amendment, or (ii) $75,000,000.
         All sums advanced under the Revolving Loan, together with all accrued
         but unpaid interest thereon, shall be due and payable in full on the
         Termination Date."

                  (d)      Notwithstanding any provisions to the contrary in the
                           Loan Agreement or the Revolving Note, until Bank
                           agrees otherwise in writing, all amounts owed on the
                           Revolving Note shall be treated as a "Stated Rate
                           Balance" as defined in the Revolving Note and shall
                           bear interest from the date advanced until paid or
                           until default or maturity at a fluctuating rate equal
                           to the sum of the Stated Rate, plus one percent
                           (1.0%), but subject to the default rate set forth in
                           the Revolving Note.

2. Collateral. (a) As security for the Notes, Borrowers previously executed the
Security Documents. Borrowers ratify and confirm the Security Documents,
acknowledge that they are valid, subsisting, and binding, and agree that the
Security Documents secure payment of the Notes and Loans.

<PAGE>

Toreador Resources Corporation, et al
September 23, 2002
Page 3 of 5

                  (b) As additional security for the Notes, Toreador Exploration
& Production Inc. will execute and deliver a Deed of Trust and Security
Agreement in Proper Form, covering oil and gas properties located in Meade
County, Kansas. This additional deed of trust will constitute one of the
"Security Documents" as defined in the Loan Agreement.

3. Conditions Precedent. (a) The obligation of Bank to make any further advance
on the Revolving Loan is subject to Borrower's satisfaction, in Bank's sole
discretion, of the following conditions precedent:

                           (1) the negotiation, execution, and delivery of Loan
Documents in Proper Form, including, but not limited to, the following:

                                    (i)      this Amendment;

                                    (ii)     Revolving Note;

                                    (iii)    Borrowing Resolutions; and

                                    (iv)     the Kansas Deed of Trust.

                           (2) satisfactory evidence that Bank holds perfected
liens and security interests in all collateral for the Loans, subject to no
other liens or security interests.

                           (3) there being no order or injunction or other
pending or threatened litigation in which there is a reasonable possibility, in
Bank's judgment, of a decision which could materially adversely affect the
ability of Borrowers to perform under the Loan Documents.

                           (4) Bank shall have completed and approved a review
of title to, and the status of the environmental condition of, Borrower's oil
and gas properties, and the results of such review shall be acceptable to Bank
in its sole discretion.

                           (5) Bank's receipt and review, with results
satisfactory to Bank and its counsel, of information regarding litigation, tax,
accounting, insurance, pension liabilities (actual or contingent), real estate
leases, material contracts, debt agreements, property ownership, and contingent
liabilities of Borrowers and any subsidiaries.

                  (b) Bank will not be obligated to make any advance on the
Loans, if, prior to the time that a loan or advance is made, (i) there has been
any material adverse change in any Borrowers' financial condition since the
most-recent financial statements furnished to Bank, (ii) any representations or
warranties made by any Borrowers in the Loan Agreement or the other Loan
Documents is untrue or incorrect as of the date of the advance or loan, (iii)
Bank has not received all Loan Documents appropriately executed

<PAGE>

Toreador Resources Corporation, et al
September 23, 2002
Page 4 of 5

by Borrowers and all other proper parties, (iv) Bank has requested that
Borrowers execute additional loan or security documents and those documents have
not yet been properly executed, delivered, and recorded, or (v) an Event of
Default has occurred.

4. Confirmations. Borrowers hereby represent to Bank that all representations
and warranties of Borrowers set forth in Section 5 of the Loan Agreement are
true and correct as of the date of execution of this Amendment; and that
Borrowers are in compliance as of the date of execution of this Amendment with
all covenants set forth in Section 6 of the Loan Agreement, all financial
covenants set forth in Section 7 of the Loan Agreement, and all reporting
requirements set forth in Section 8 of the Loan Agreement.

5. Validity and Defaults. The Loan Agreement, as amended, remains in full force
and effect. Borrowers acknowledge that the Loan Agreement, the Notes, and the
Security Documents are valid, subsisting, and binding upon Borrowers; no uncured
breaches or defaults exist under the Loan Agreement, as amended; and no event
has occurred or circumstance exists which, with the passing of time or giving of
notice, will constitute a default or breach under the Loan Agreement, as
amended. Borrowers ratify the Loan Agreement, as amended.

6. Fax Provision. This Amendment and the related Loan Documents may be executed
in counterparts, and Bank is authorized to attach the signature pages from the
counterparts to copies for Bank and Borrowers and filing counterparts. At Bank's
option, this Amendment and the related Loan Documents may also be executed by
Borrowers in remote locations with signature pages faxed to Bank. Borrowers
agree that the faxed signatures are binding upon Borrowers, and Borrowers
further agree to promptly deliver the original signatures for this Amendment and
the related Loan Documents by overnight mail or expedited delivery. It will be
an Event of Default if they fail to promptly deliver all required original
signatures.

7. Captions. Captions are for convenience only and should not be used in
interpreting this Amendment.

8. Final Agreement. (a) In connection with the Loans, Borrowers and Bank have
executed and delivered this Amendment and the Loan Documents (collectively the
"Written Loan Agreement").

                  (b) It is the intention of Borrowers and Bank that this
paragraph be incorporated by reference into each of the Loan Documents.
Borrowers and Bank each warrant and represent that their entire agreement with
respect to the Loans is contained within the Written Loan Agreement, and that no
agreements or promises have been made by, or exist by or among, Borrowers and
Bank that are not reflected in the Written Loan Agreement.

                  (c)      THE LOAN AGREEMENT, AS AMENDED, REPRESENTS THE
FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF
PRIOR, CONTEMPORANEOUS, OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES. THERE ARE
NO UNWRITTEN AGREEMENTS BETWEEN THE PARTIES.

<PAGE>

Toreador Resources Corporation, et al
September 23, 2002
Page 5 of 5

         If the foregoing correctly sets forth your understanding of our
agreement, please sign and return one copy of this letter.

                                         Yours very truly,

                                         BANK OF TEXAS, NATIONAL ASSOCIATION

                                         By:  /s/ Timothy E. Merrell
                                              ---------------------------------
                                              Timothy E. Merrell,
                                              Senior Vice President

Agreed on this 23rd day of September, 2002:

BORROWERS:

TOREADOR RESOURCES CORPORATION

By:      /s/ Douglas W. Weir
         --------------------------------------
         Douglas W. Weir, Vice President

TOREADOR EXPLORATION & PRODUCTION INC.

By:      /s/ Douglas W. Weir
         --------------------------------------
         Douglas W. Weir, Vice President

TOREADOR ACQUISITION CORPORATION

By:      /s/ Douglas W. Weir
         --------------------------------------
         Douglas W. Weir, Vice President

TORMIN, INC.

By:      /s/ Douglas W. Weir
         --------------------------------------
         Douglas W. Weir, Vice President

Exhibits:

A - Revolving Note<PAGE>
                                                                    EXHIBIT 10.3

                           THIS AGREEMENT MADE AS OF
                           THE 28th DAY OF JUNE, 2002

BETWEEN:

                     TULLOW PAKISTAN (DEVELOPMENTS) LIMITED
                   (hereinafter referred to as the "Creditor")

                                     --and--

                         TOREADOR RESOURCES CORPORATION
                    (hereinafter referred to as the "Debtor")

         WHEREAS the Creditor has commenced proceedings against Trans-Dominion
Energy Corporation and others in Action No. 9901-16339; in the Court of Queen's
Bench of Alberta, Judicial Centre of Calgary, (the "Action");

         AND WHEREAS Trans-Dominion Energy Corporation subsequently amalgamated
with Madison Oil Company to form the amalgamated corporation Madison Oil
Company;

         AND WHEREAS Madison Oil Company subsequently amalgamated with Toreador
Resources Corporation, a body corporate having a place of business in the City
or Dallas, in the State of Texas, United States of America, to form the
amalgamated corporation Toreador Resources Corporation, the "Debtor" herein;

         AND WHEREAS the Creditor and the Debtor have agreed to terms of
compromise of the matters in dispute in the Action, as set out herein;

         NOW THEREFORE in consideration of the covenants set out herein the
parties hereto covenant and agree as follows:

<PAGE>
                                      -2-

1.       The matters set forth in the preamble to this Agreement, above, are
         acknowledged to be true.

2.       The Debtor shall pay to Macleod Dixon LLP, in trust for the Creditor
         the sum of FIFTY THOUSAND DOLLARS ($50,000.00) in United States funds
         at the time of execution of this Agreement, which funds shall be
         releaseable from trust immediately.

3.       The Debtor shall pay to the Creditor the further sum of THREE HUNDRED
         AND FIFTY THOUSAND DOLLARS ($350,000.00) in United States funds no
         later than February 3, 2003. Such funds shall be paid to Macleod Dixon
         LLP (Attention: Andrew R. Robertson) ("counsel for the Creditor") in
         trust under trust conditions providing that it shall not be released to
         the Creditor until a Discontinuance of Action No. 9901-16339 has been
         filed at the Court of Queen's Bench of Alberta and the executed Release
         described below bas been provided to the Debtor's counsel.

4.       Upon the receipt, no later than February 3, 2003, by counsel for the
         Creditor of the funds required herein to be paid, the Creditor shall
         instruct such legal counsel to file promptly a Discontinuance of Action
         in the Action and deliver promptly to Code Hunter LLP (Attention: David
         de Vlieger) a filed copy of the said Discontinuance and an executed
         Release in the form attached hereto as SCHEDULE "A". The Debtor shall
         instruct Code Hunter LLP to consent to the said Discontinuance without
         costs payable to any party.

5.       In the event that the Debtor does not pay the funds requited on or
         before February 3, 2003, then the parties agree that the Creditor may
         discontinue the Action as against Karak Petroleum Pakistan Ltd. and
         thereafter the proceedings in the Action shall continue according to
         the schedule set out on the draft Consent Order attached hereto as
         SCHEDULE "B", and the Debtor and Creditor hereby instruct their legal
         counsel to consent irrevocably, immediately upon execution of this
         Agreement, to the said Consent Order and that the Consent Order shall
         be held by counsel for the Creditor until February 4, 2003 on the
         following terms:

<PAGE>
                                      -3-

         (a)      If the sum of THREE HUNDRED AND FIFTY THOUSAND DOLLARS
                  ($350,000.00) (as well as the initial FIFTY THOUSAND DOLLARS
                  ($50,000) (U.S. Funds) is not paid on or before February 3,
                  2003, the Order may be presented to the Court for signature
                  and entry, and

         (b)      If the said sum is paid on or before February 3, 2003, then
                  the Order shall not be used.

6.       If the Creditor discontinues the Action as against Karak Petroleum
         Pakistan Ltd., such discontinuance shall be without prejudice to the
         respective legal positions of the parties to this Agreement.

7.       This Agreement shall be governed by the laws of Alberta and, as
         applicable, the laws of Canada.

         IN WITNESS WHEREOF the parties have executed this Agreement, in
counterpart and by facsimile, as of the date first set out above.

                     TULLOW PAKISTAN (DEVELOPMENTS) LIMITED

                             Per: /s/ Graham Martin, Director
                                  ---------------------------------------------

                             TOREADOR RESOURCES CORPORATION

                             Per: /s/ G. Thomas Graves III, President and CEO
                                  ---------------------------------------------

<PAGE>

                                  SCHEDULE "A"

                                     RELEASE

         KNOW ALL PERSONS BY THESE PRESENTS that TULLOW PAKISTAN (DEVELOPMENTS)
LIMITED, being a body corporate incorporated in Jersey, Channel Islands, having
its registered office at Channel House, Green Street, St. Helier, Jersey in the
City of London, in the United Kingdom of Great Britain and Northern Ireland, for
and in consideration of the sum of FOUR HUNDRED THOUSAND DOLLARS ($400,000.00)
in United States Currency, paid by or on behalf of TOREADOR RESOURCES
CORPORATION, the receipt and sufficiency whereof being hereby acknowledged, does
hereby remise and release, and does forever discharge TOREADOR RESOURCES
CORPORATION, as well as TRANS-DOMINION ENERGY CORPORATION and TRANS-DOMINION
HOLDING LTD. as well as their successors and assigns (collectively referred to
herein as the "RELEASEES"), of and from all actions, causes of action, suits,
debts, dues, sums of money, claims and demands whatsoever at law or in equity
which it ever had, or now has, or which it, or its successors or assigns
hereafter can, shall, or may have against the RELEASEES, or any of them, in
relation to any matter or matters or claims whatsoever, including any matter or
matters or claims which arise out of or are in any way connected with:

         (a)      the matters referred to and alleged in the pleadings filed in
                  Action Number 9901-16339 in the Court of Queen's Bench of
                  Alberta, Judicial Centre of Calgary,

         (b)      that Joint Operating Agreement made the 21st day of July, 1987
                  between Ranger Oil Limited, Sabre Petroleum Limited and Oil &
                  Gas Development Corporation, as amended and assigned.

         TULLOW PAKISTAN (DEVELOPMENTS) LIMITED acknowledges that the taking of
this Release shall not be construed as an admission of any liability on the part
of any of the RELEASEES.

         IN WITNESS WHEREOF the undersigned has executed this Release by its
officer duly authorized in that behalf as of this ___th day of ___________,
200_.

                     TULLOW PAKISTAN (DEVELOPMENTS) LIMITED

                     Per:
                             ----------------------------------------

<PAGE>

                                  SCHEDULE "B"

                                                           Action No. 9901-16339

                    IN THE COURT OF QUEEN'S BENCH OF ALBERTA
                           JUDICIAL CENTRE OF CALGARY

BETWEEN:

                     TULLOW PAKISTAN (DEVELOPMENTS) LIMITED

                                                                       Plaintiff

                                      -and-

         TRANS-DOMINION ENERGY CORPORATION, TRANS-DOMINION HOLDING LTD.
                        AND KARAK PETROLEUM PAKISTAN LTD.

                                                                      Defendants

BEFORE THE HONOURABLE             )   At the Courthouse, in the City of Calgary,
JUSTICE                           )   in the Province of Alberta, on _________,
IN CHAMBERS                       )   the ___ day of _________, 2003

                                  CONSENT ORDER

         UPON the application of Counsel for the Plaintiff; AND UPON noting the
consent endorsed thereon by Counsel for the Defendant, Trans-Dominion Energy
Corporation and Trans-Dominion Holding Ltd.; AND UPON BEING ADVISED that the
Defendant, Karak Petroleum Pakistan Ltd., is in bankruptcy proceedings in the
Isle of Man, British Isles; IT IS HEREBY ORDERED as follows:

<PAGE>

1.       The Defendant Trans-Dominion Energy Corporation shall provide answers
         to all undertakings given by its representative at Examinations for
         Discovery no later than Friday, February 14, 2003.

2.       Examinations for Discovery by both Plaintiff and Defendants on matters
         arising out of undertakings shall be completed on or before March 31,
         2003.

3.       A pre-trial conference shall be arranged for the first date following
         March 31, 2003 as is convenient to the Court's schedule as well as
         counsel for the Plaintiff and the Defendant, Trans-Dominion Energy
         Corporation and Trans-Dominion Holding Ltd.

4.       The Plaintiff's discontinuance of its claim against Karak Petroleum
         Pakistan Ltd. shall be without prejudice to its claim against the
         remaining Defendants.

5.       The parties are given leave to return to the Court for any further
         Order as may be necessary to achieve the expeditious trial of this
         matter.

                                    -----------------------------------------
                                    J.C.Q.B.A

Entered this ___ day of ____________, 2002

-----------------------------------------
Clerk of the Court

CONSENTED TO this __day of July, 2002.

MACLEOD DIXON LLP

Per:
         -----------------------------------
         Andrew R. Robertson
         Solicitors for the Plaintiff

CODE HUNTER LLP

Per:
         -----------------------------------
         David de Vlieger
         Solicitors for the Defendants,
         Trans-Dominion Energy Corporation
         and Trans-Dominion Holding Ltd.

<PAGE>

Action No. 9901-16339
--------------------------------------------------------------------------------

                          IN THE COURT OF QUEEN'S BENCH
                                   OF ALBERTA
                           JUDICIAL CENTRE OF CALGARY

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

BETWEEN:

                                 TULLOW PAKISTAN
                             (DEVELOPMENTS) LIMITED

                                                                       Plaintiff

                                      -and-

                              TRANS-DOMINION ENERGY
                           CORPORATION, TRANS-DOMINION
                                  HOLDING LTD.
                               AND KARAK PETROLEUM
                                  PAKISTAN LTD.

                                                                      Defendants

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

                                  CONSENT ORDER

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

                                Macleod Dixon LLP
                             Barristers & Solicitors
                           3700, 400 - Third Avenue SW
                            Calgary, Alberta T2P 4H2

                               Andrew R. Robertson
                               Telephone: 267-8287
                              Telecopier: 264-5973

                                 File No. 169951

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