Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the reference to our firm under the caption “Experts” in this Registration Statement (Form S-3) and related Prospectus of Apache Corporation for the registration of common stock, preferred stock, depositary shares, common stock purchase contracts, common stock purchase units, senior debt securities, and subordinated debt securities and to the incorporation by reference therein of our reports dated February 28, 2008, with respect to the consolidated financial statements of Apache Corporation, and the effectiveness of internal control over financial reporting of Apache Corporation, included in its Annual Report (Form 10-K) for the year ended December 31, 2007, filed with the Securities and Exchange Commission.

Ernst & Young LLP

Houston, Texas
December 1, 2008