EXHIBIT 23.1

            CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Registration Statement
(Form S-8) pertaining to the Apache Corporation 2005 Share Appreciation Plan of
our reports dated March 11, 2005 with respect to the consolidated financial
statements of Apache Corporation, Apache Corporation management's assessment of
the effectiveness of internal control over financial reporting, and the
effectiveness of internal control over financial reporting of Apache
Corporation, included in the Annual Report on Form 10-K for the year ended
December 31, 2004, filed with the Securities and Exchange Commission.

                                             /s/ Ernst & Young LLP
                                             ERNST & YOUNG LLP

Houston, Texas
May 23, 2005