EXHIBIT 23.1 INDEPENDENT AUDITORS' CONSENT The Board of Directors and Stockholders Nuevo Energy Company We consent to incorporation by reference in the registration statements (Nos.333-107990 and 333-102627) on Form S-8, registration statement (No. 333-112027) on Form S-3, of Plains Exploration & Production Company of our report dated March 5, 2004, relating to the consolidated balance sheets of Nuevo Energy Company and subsidiaries as of December 31, 2003 and 2002 and the related consolidated statements of income, stockholders' equity, cash flows and comprehensive income for each of the years in the three-year period ended December 31, 2003, and the related financial statement schedule, which reports appear in the March 17, 2004 Form 8-K of Plains Exploration & Production Company. Our report dated March 5, 2004, contains an explanatory paragraph that states that the Company changed its method of accounting for derivative instruments effective January 1, 2001, its method of accounting for asset retirement obligations effective January 1, 2003, and its method of accounting for certain convertible subordinated debentures effective December 31, 2003. KPMG LLP Houston, Texas March 16, 2004