EXHIBIT 23.1



            CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM


We consent to the incorporation by reference in the Registration Statement (Form
S-8 Nos. 33-31407 and 33-63817) pertaining to the Apache Corporation 401(k)
Savings Plan of our report dated June 20, 2005, with respect to the financial
statements and schedule of the Apache Corporation 401(k) Savings Plan included
in this Annual Report (Form 11-K) for the year ended December 31, 2004.


                                                /s/ Ernst & Young LLP

Houston, Texas
June 23, 2005