Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the Registration Statement (Form S-8) pertaining to the 2011 Omnibus Equity Compensation Plan of Apache Corporation of our reports dated February 28, 2011, 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) , as amended by Amendment No. 1 to its Annual Report on Form 10-K/A, for the year ended December 31, 2010, filed with the Securities and Exchange Commission.

/s/ Ernst & Young LLP  

Houston, Texas
June 29, 2011