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                                                                    EXHIBIT 4(i)


                              CERTIFICATE OF TRUST
                                       OF
                       ANADARKO PETROLEUM CAPITAL TRUST I

         This Certificate of Trust is being executed as of February 9, 2001 for
the purposes of organizing a business trust pursuant to the Delaware Business
Trust Act, 12 Del. C. Sections 3801 et seq. (the "Act").

         The undersigned hereby certifies as follows:

         1.  Name. The name of the business trust is "Anadarko Petroleum Capital
Trust I" (the "Trust").

         2.  Delaware Trustee. The name and business address of the Delaware
resident trustee of the Trust meeting the requirements of Section 3807 of the
Act are as follows:

                           The Bank of New York (Delaware)
                           White Clay Center, Route 273
                           Newark, Delaware 19711

         3.  Effectiveness. This Certificate of Trust shall be effective
immediately upon filing in the Office of the Secretary of State of the State of
Delaware.


         IN WITNESS WHEREOF, the undersigned, being a trustee of the Trust, has
duly executed this Certificate of Trust as of the date and year first above
written.

                                       THE BANK OF NEW YORK (DELAWARE)
                                       not in its individual capacity but solely
                                       as a trustee of the Trust


                                       By: /s/ Michael Santino
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                                           Name:    Michael Santino, SVP
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                                           Title:
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