Occidental Petroleum (OXY) S-3ASR Automatic shelf registration

Exhibt 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the use of our reports dated February 24, 2022, with respect to the consolidated financial statements and financial statement schedule II – valuation and qualifying accounts of Occidental Petroleum Corporation, and the effectiveness of internal control over financial reporting, incorporated herein by reference and to the reference to our firm under the heading “Experts” in the prospectus.

/s/ KPMG LLP

Houston, Texas

July 29, 2022