EXHIBIT 99.3

               STATEMENT UNDER OATH OF PRINCIPAL FINANCIAL OFFICER
        OF APACHE CORPORATION REGARDING FACTS AND CIRCUMSTANCES RELATING
                             TO EXCHANGE ACT FILINGS

I, Roger B. Plank, Executive Vice President and Chief Financial Officer of
Apache Corporation, state and attest that:

         (1) To the best of my knowledge, based upon a review of the covered
         reports of Apache Corporation (the "Company"), and, except as corrected
         or supplemented in a subsequent covered report:

             o    no covered report contained an untrue statement of a material
                  fact as of the end of the period covered by such report (or in
                  the case of a report on Form 8-K or definitive proxy
                  materials, as of the date on which it was filed); and

             o    no covered report omitted to state a material fact necessary
                  to make the statements in the covered report, in light of the
                  circumstances under which they were made, not misleading as of
                  the end of the period covered by such report (or in the case
                  of a report on Form 8-K or definitive proxy materials, as of
                  the date on which it was filed).

         (2) I have reviewed the contents of this statement with the Company's
         audit committee.

         (3) In this statement under oath, each of the following, if filed on or
         before the date of this statement, is a "covered report":

             o    Annual Report of the Company on Form 10-K for the year ended
                  December 31, 2001;

             o    all reports on Form 10-Q, all reports on Form 8-K and all
                  definitive proxy materials of the Company filed with the
                  Commission subsequent to the filing of the Form 10-K
                  identified above; and

             o    any amendments to any of the foregoing.


                                                    /s/ Roger B. Plank
                                                    ----------------------------
                                                    Roger B. Plank
                                                    Executive Vice President
                                                    and Chief Financial Officer


Subscribed and sworn to by Roger B. Plank before me this 12th day of August
2002.
                                                /s/ VALENCIA A. MCNEIL
                                                --------------------------------
                                                Notary Public
[SEAL]
My Commission Expires: April 16, 2006