EXHIBIT 4(d)

                           FOURTH AMENDMENT
                                  TO
                            NOTE AGREEMENT

     This FOURTH AMENDMENT TO NOTE AGREEMENT (this "Amendment") dated
as of December 31, 1993 is among SANTA FE ENERGY RESOURCES, INC., a
Delaware corporation (the "Company"), and the entities identified on
the signature pages hereof as the holders (the "Required Holders") of
at least 51% of the aggregate principal amount of the Company's senior
promissory notes (the "Notes") outstanding, which were issued in seven
series in the aggregate principal amount of $365,000,000 pursuant to
the Note Agreement, dated as of March 31, 1990, among the Company and
the original Purchasers of the Notes, as amended by the First
Amendment to Note Agreement dated as of November 1, 1990, the Second
Amendment to Note Agreement dated as of September 1, 1991 and the
Third Amendment to Note Agreement dated as of November 1, 1992 (as so
amended, the "Agreement"). All capitalized terms defined in the
Agreement and not otherwise defined herein shall have the same
meanings herein as in the Agreement.

                         PRELIMINARY STATEMENT

     The Company and the Required Holders have agreed, upon the terms
and conditions specified herein, to amend the Agreement as hereinafter
set forth.

     NOW THEREFORE, in consideration of the premises and other good
and valuable consideration, the receipt and sufficiency of which are
hereby acknowledged by the parties hereto, the Company and the
Required Holders hereby agree as follows:

                                  -1-

          SECTION 1.  AMENDMENT TO PARAGRAPH 5A OF THE AGREEMENT.
     The final paragraph of Paragraph 5A is hereby amended by
inserting the following sentence immediately before the final sentence
of said paragraph:
 
          "Together with each delivery of financial statements
          required by clause (i) or (ii) above, the Company will
          deliver to each holder a pro forma statement of operations
          of the Company and its Restricted Subsidiaries for the same
          fiscal period as such financial statements that assumes that
          the impairments of oil and gas properties taken by the
          Company and its Restricted Subsidiaries in the fourth
          quarter of 1993 in the amount of up to $100 million as
          reflected in the Company's consolidated financial statements
          for the year ended December 31, 1993, shall not have
          occurred and a calculation in reasonable detail showing the
          determination of Consolidated Net Earnings and Unimpaired
          Consolidated Net Earnings for such fiscal period."

          SECTION 2.  AMENDMENT TO PARAGRAPH 6A OF THE AGREEMENT. 
Paragraph 6A is hereby amended by amending the definition of
Consolidated Net Earnings Available for Restricted Payments and
Restricted Investments contained in such Paragraph by replacing the
term "Consolidated Net Earnings" in each place where it appears in
such definition with the term "Unimpaired Consolidated Net Earnings". 

          SECTION 3.  AMENDMENT TO PARAGRAPH 6B(1) OF THE AGREEMENT. 
Paragraph 6B(1) is hereby amended by inserting the following phrase
before the comma at the end of clause (vi) of said Paragraph:

          "and shall not secure any portion of the Company's or any
          Restricted Subsidiary's Debt representing any advance (other
          than advances with respect to the Adobe Debt) made to the
          Company or any of its Restricted Subsidiaries, other than
          advances the proceeds of which are paid solely to the Person
          (or any successor or assignee of such Person) which is the
          acquiree in such acquisition or that is providing such
          construction, development or improvement". 

                                  -2-

          SECTION 4.  AMENDMENTS TO PARAGRAPH 6B(2) OF THE AGREEMENT.

          (a) Paragraph 6B(2) is hereby amended by inserting the
     following phrase at the beginning of clause (iii)(c) of said
     Paragraph:

          "(1) for any such creation, incurrence or assumption
          occurring prior to December 31, 1998, Priority Debt (other
          than Existing Priority Debt) shall not exceed the lesser of
          (A)(I) 40% of Consolidated Net Tangible Assets minus (II)
          Existing Priority Debt and (B) 33% of Consolidated Net
          Tangible Assets, and (2) for any such creation, incurrence
          or assumption occurring on or after December 31, 1998,
          Priority Debt shall not exceed 33% of Consolidated Net
          Tangible Assets, and,".

          (b) Paragraph 6B(2) is hereby further amended by inserting
     the following phrase at the beginning of clause (iv)(c) of said
     Paragraph:

          "(1) for any such creation, incurrence or assumption
          occurring prior to December 31, 1998, Priority Debt (other
          than Existing Priority Debt) shall not exceed the lesser of
          (A)(I) 40% of Consolidated Net Tangible Assets minus (II)
          Existing Priority Debt and (B) 33% of Consolidated Net
          Tangible Assets, and (2) for any such creation, incurrence
          or assumption occurring on or after December 31, 1998,
          Priority Debt shall not exceed 33% of Consolidated Net
          Tangible Assets, and,".

          SECTION 5.  AMENDMENTS TO PARAGRAPH 10 OF THE AGREEMENT.

          (a) Paragraph 10 is hereby amended by adding thereto in
     alphabetical order the following definitions:

                   "ADOBE DEBT" at any time shall mean with respect to
          the Debt of the Company incurred as of May 20, 1992, in
          connection with the merger of Adobe Resources Corporation
          into the Company, as such Debt may have been or hereafter
          may be renewed, extended or otherwise modified, the maximum
          principal amount of such Debt that can be outstanding at
          such time, but only to the extent that such amount is equal
          to or less than (i) $90,000,000, at any time during the
          period from and including December 31, 1993, to and
          including December 30, 1994, (ii) $72,000,000, at any time
          during the period from and including December 31, 1994, to
          and including December 30, 1995, (iii) $54,000,000, at any
          time during the period from and including December 31, 1995,
          to and including December 30, 1996, (iv) $36,000,000, at any
          time during the period from and including December 31, 1996,
          to and 

                                  -3-

          including December 30, 1997, (v) $18,000,000, at any time
          during the period from and including December 31, 1997, to
          and including December 30, 1998, and (vi) $0.00 at any time
          thereafter.

                   "EXISTING PRIORITY DEBT" at any time shall mean, to
          the extent that it is otherwise Priority Debt, an amount
          equal to the sum of (i) the Adobe Debt at such time, (ii)
          the outstanding principal amount of Debt under the Springing
          Lien Agreement at such time, and (iii) the outstanding
          principal amount of Debt under those certain Credit
          Agreements of Petrolera Santa Fe S.A., dated as of June 25,
          1991 and April 28, 1992, at such time. 

                   "HADSON" shall mean Hadson Corporation, a Delaware
          corporation, and any successor corporation thereto. 

                   "HADSON STOCK" shall mean, to the extent held
          continuously by the Company or any of its Restricted
          Subsidiaries after the merger of SFER Pipeline, Inc. into
          the Company, (i) any of the 2,080,000 shares of the Senior
          Cumulative Preferred Stock, Series A, par value $.01 per
          share, of Hadson and the 10,395,665 shares of the common
          stock, par value $.01 per share of Hadson, acquired by the
          Company or any of its Subsidiaries on or before January 31,
          1994, (ii) any stock acquired by virtue of one or more stock
          splits or recapitalizations involving such common stock or
          Senior Cumulative Preferred Stock and not involving any
          additional economic consideration on the part of the Company
          or any of its Subsidiaries, and (iii) any dividend paid on
          such common stock or Senior Cumulative Preferred Stock
          solely in the capital stock of Hadson.

                   "PRIORITY DEBT" at any time shall mean an amount
          equal to the sum of (without duplication) the amount of all
          Special Debt outstanding at such time and the amount of all
          Debt of the Company and its Restricted Subsidiaries
          outstanding at such time that is secured by one or more
          Liens permitted under clause 6B(1)(iv), (v), (vi), (vii),
          (viii), (ix), (x), (xi) or (xii).

                   "UNIMPAIRED CONSOLIDATED NET EARNINGS" for any
          period shall mean the amount of Consolidated Net Earnings
          for such period except that with respect to the oil and gas
          properties impairments taken by the Company and its
          Restricted Subsidiaries in the fourth quarter of 1993 in the
          amount of up to $100 million as reflected in the Company's
          consolidated financial statements for the year ended
          December 31, 1993:
 
                   (i) for any calculation of "Unimpaired Consolidated
              Net Earnings" for any fiscal period of the Company and
              its Restricted Subsidiaries ending on or after December
              31, 1993, 
                                  -4-

              the net earnings of the Company and its Restricted
              Subsidiaries shall not be reduced by the amount of such
              oil and gas properties impairments; and

                   (ii) for any such calculation for any fiscal period
              of the Company and its Restricted Subsidiaries ending on
              or after December 31, 1993, the depreciation, depletion
              and amortization expenses of the Company and its
              Restricted Subsidiaries shall be calculated on a pro
              forma basis as if such oil and gas properties
              impairments had never occurred.

          (b) Paragraph 10 is hereby further amended by deleting the
     phrase "but not including in gross revenues any dividends,
     distributions or other payments received by the Company and its
     Restricted Subsidiaries from the Special Subsidiary" in its
     entirety from the definition of "Consolidated Net Earnings" in
     such Paragraph and replacing said phrase with the following
     phrase:

              "but not including in gross revenues any dividends,
              distributions or other payments received by the Company
              or any of its Restricted Subsidiaries in connection with
              the Hadson Stock, unless received in the form of cash,
              or any dividends, distributions or other payments
              received by the Company or any of its Restricted
              Subsidiaries from the Special Subsidiary".

          (c) Paragraph 10 is hereby further amended by inserting the
     following phrase at the end of clause (A)(5) of the definition of
     "Consolidated Net Tangible Assets" in such paragraph immediately
     prior to the period in such clause:

              "(other than Restricted Investments in the capital stock
              of Hadson)".

          (d) Paragraph 10 is hereby further amended by deleting
     clause (x) of the definition of "Restricted Investment" in such
     Paragraph and replacing said clause with the following two
     clauses:

              "(x) Investments in the Hadson Stock, or

                                  -5-

          (xi) Investments not otherwise permitted hereunder in an
          aggregate principal amount not to exceed $10,000,000."

          SECTION 6.  CONDITIONS OF EFFECTIVENESS.  This Amendment
shall become effective when, and only when the Company and the
Required Holders shall have executed a counterpart hereof and
delivered the same to the Company.

          SECTION 7.  REFERENCE TO THE AGREEMENT AND EFFECT ON THE
NOTES AND OTHER DOCUMENTS EXECUTED PURSUANT TO THE AGREEMENT.

          (a) Upon the effectiveness of this Amendment, each reference
     in the Agreement to "this Agreement," "hereunder," "herein,"
     "hereof" or words of like import shall mean and be a reference to
     the Agreement, as affected and amended hereby.

          (b) Upon the effectiveness of this Amendment, each reference
     in the Notes and the other documents and agreements delivered or
     to be delivered pursuant to the Agreement shall mean and be a
     reference to the Agreement, as affected and amended hereby.

          (c) The Agreement, as amended and modified by the amendment
     referred to above, shall remain in full force and effect and is
     hereby ratified and confirmed.

          SECTION 8.  EXECUTION IN COUNTERPARTS.  This Amendment may
be executed in any number of counterparts and by different parties
hereto in separate counterparts, each of which when so executed and
delivered shall be deemed to be an original and all of which taken
together shall constitute but one and the same instrument.

                                  -6-

          SECTION 9.  GOVERNING LAW.  THIS AMENDMENT SHALL BE
CONSTRUED AND ENFORCED IN ACCORDANCE WITH, AND THE RIGHTS OF THE
PARTIES SHALL BE GOVERNED BY, THE LAWS OF THE STATE OF TEXAS AND THE
UNITED STATES OF AMERICA.


          SECTION 10.  HEADINGS.  Section headings in this Amendment
are included herein for convenience of reference only and shall not
constitute a part of this Amendment for any other purpose.

                                  -7-

     IN WITNESS WHEREOF, the parties hereto have caused this Amendment
to be executed effective as of the date first stated herein, by their
respective officers thereunto duly authorized.

                                   SANTA FE ENERGY RESOURCES, INC.

                                   By:    MICHAEL J. ROSINSKI
                                   Name:  Michael J. Rosinski
                                   Title: Vice President and
                                          Chief Financial Officer

                                   REQUIRED HOLDERS:

                                   ALLSTATE INSURANCE COMPANY

                                   By:
                                   Name:
                                   Title:

                                   AMERICAN ENTERPRISE LIFE
                                   INSURANCE COMPANY

                                   By:
                                   Name:
                                   Title:

                                  -8-

                                   AMERICAN GENERAL LIFE
                                   INSURANCE COMPANY

                                   By:
                                   Name:
                                   Title:

                                   AMERICAN GENERAL LIFE
                                   INSURANCE COMPANY OF
                                   DELAWARE

                                   By:
                                   Name:
                                   Title:

                                   CENTRAL LIFE ASSURANCE
                                   COMPANY

                                   By:
                                   Name:
                                   Title:

                                   COVENANT LIFE ASSURANCE
                                   COMPANY

                                   By:    William Blair & Company,
                                            Agent

                                   By:
                                   Name:
                                   Title:

                                  -9-

                                   EQUITABLE VARIABLE LIFE
                                   INSURANCE COMPANY

                                   By:
                                   Name:
                                   Title:


                                   THE EQUITABLE LIFE ASSURANCE
                                   SOCIETY OF THE UNITED STATES

                                   By:
                                   Name:
                                   Title:

                                   THE EQUITABLE OF COLORADO, INC.

                                   By:
                                   Name:
                                   Title:

                                   FARM BUREAU LIFE INSURANCE
                                   COMPANY

                                   By:    RICHARD D. WARMING
                                   Name:  Richard D. Warming
                                   Title: VP-Chief Investment
                                            Officer
                                 -10-

                                   FARM FAMILY LIFE INSURANCE
                                   COMPANY

                                   By:
                                   Name:
                                   Title:

                                   FARM FAMILY MUTUAL INSURANCE
                                   COMPANY

                                   By:
                                   Name:
                                   Title:

                                   FBL INSURANCE COMPANY

                                   By:    RICHARD D. WARMING
                                   Name:  Richard D. Warming
                                   Title: VP-Chief Investment
                                            Officer

                                   GENERAL AMERICAN LIFE
                                   INSURANCE COMPANY

                                   By:
                                   Name:
                                   Title:

                                 -11-

                                   GREAT-WEST LIFE & ANNUITY
                                   INSURANCE COMPANY

                                   By:    DAVID SULLIVAN
                                   Name:  David Sullivan
                                   Title: Vice President
                                          Private Placement
                                            Investments

                                   By:    WAYNE T. HOFFMANN
                                   Name:  Wayne T. Hoffmann
                                   Title: Vice President
                                          Private Placement
                                            Investments

                                   IDS LIFE INSURANCE COMPANY

                                   By:
                                   Name:
                                   Title:

                                   KANSAS PUBLIC EMPLOYEES
                                   RETIREMENT SYSTEM

                                   By:    The Boston Safe Deposit
                                          and Trust Company, Agent

                                   By:
                                   Name:
                                   Title:

                                 -12-

                                   KEYPORT LIFE INSURANCE CO.

                                   By:    Stein Roe & Farnham
                                          Incorporated, as Agent

                                   By:    RICHARD A. HEGWOOD
                                   Name:  Richard A. Hegwood
                                   Title: Vice President

                                   MASSACHUSETTS MUTUAL LIFE
                                   INSURANCE COMPANY

                                   By:    RICHARD C. MORRISON
                                   Name:  Richard C. Morrison
                                   Title: Vice President

                                   MELLON SECURITY TRUST

                                   By:
                                   Name:
                                   Title:

                                   MERRIL LYNCH LIFE INSURANCE
                                   COMPANY

                                   By:    DAVID M. DUNFORD
                                   Name:  David M. Dunford
                                   Title: Senior Vice President

                                 -13-

                                   MODERN WOODMEN OF AMERICAN

                                   By:
                                   Name:
                                   Title:

                                   THE MUTUAL BENEFIT LIFE
                                   INSURANCE COMPANY

                                   By:
                                   Name:
                                   Title:

                                   OHIO CASUALTY INSURANCE
                                   COMPANY

                                   By:
                                   Name:
                                   Title:

                                   OHIO LIFE INSURANCE COMPANY

                                   By:
                                   Name:
                                   Title:

                                 -14-

                                   PAN-AMERICAN LIFE INSURANCE
                                   COMPANY

                                   By:
                                   Name:
                                   Title:

                                   PRINCIPAL MUTUAL LIFE
                                   INSURANCE COMPANY

                                   By:    STEPHEN G. SKRIVANEK
                                   Name:  Stephen G. Skrivanek
                                   Title: Counsel

                                   By:    CLINT WOODS
                                   Name:  Clint Woods
                                   Title: Counsel

                                   PROVIDENT LIFE AND ACCIDENT
                                   INSURANCE COMPANY

                                   By:
                                   Name:
                                   Title:

                                   PROVIDENT NATIONAL ASSURANCE
                                   COMPANY

                                   By:
                                   Name:
                                   Title:

                                 -15-

                                   THE PRUDENTIAL INSURANCE
                                   COMPANY OF AMERICA

                                   By:    PruCapital Management,
                                            Inc., Agent

                                   By:    STEVEN ARNOLD
                                   Name:  Steven Arnold
                                   Title: Vice President

                                   SECURITY MUTUAL LIFE INSURANCE
                                   COMPANY OF NEW YORK

                                   By:
                                   Name:
                                   Title:

                                   SMA LIFE ASSURANCE COMPANY

                                   By:    SCOTT C. HYNEY
                                   Name:  Scott C. Hyney
                                   Title: Assistant Treasurer

                                   STATE MUTUAL LIFE ASSURANCE
                                   COMPANY OF AMERICA

                                   By:    SCOTT C. HYNEY
                                   Name:  Scott C. Hyney
                                   Title: Assistant Treasurer

                                 -16-

                                   SUN LIFE ASSURANCE COMPANY OF
                                   CANADA (U.S.)

                                   By:    L. BROCK THOMSON
                                   Name:  L. Brock Thomson
                                   Title: Treasurer

                                   SUN LIFE INSURANCE AND ANNUITY
                                   COMPANY OF NEW YORK

                                   By:    L. BROCK THOMSON
                                   Name:  L. Brock Thomson
                                   Title: Treasurer


                                   THE TRAVELERS INDEMNITY
                                   COMPANY

                                   By:    JOHN GILSENAN
                                   Name:  John Gilsenan
                                   Title: 2nd Vice President

                                   THE TRAVELERS INSURANCE
                                   COMPANY

                                   By:    JOHN GILSENAN
                                   Name:  John Gilsenan
                                   Title: 2nd Vice President

                                 -17-

                                   UNITED OF OMAHA LIFE INSURANCE
                                   COMPANY

                                   By:
                                   Name:
                                   Title:

                                   USG ANNUITY & LIFE COMPANY

                                   By:
                                   Name:
                                   Title:

                                   WEST AMERICAN INSURANCE
                                   COMPANY

                                   By:
                                   Name:
                                   Title:

                                 -18-