EXHIBIT 23.1 CONSENT OF INDEPENDENT AUDITORS We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 Registration Nos. (333-91247, 333-95071, 333-52324, 33-22493, 33-25807, 33-26024, as amended in Registration No. 2-97533, 33-33626, 33-46518, 33-53973, 333-02029, 333-32603, 333-40565, 333-60081 and 333-90906) and on Form S-3 Registration Nos. (33-54477, 333-24999, 333-52213, 333-83163, 333-36032, 333-61600 and 333-87170) of Burlington Resources Inc. of our report dated February 25, 2004 relating to the financial statements, which appears in this Form 10-K. /s/ PRICEWATERHOUSECOOPERS LLP Houston, Texas February 26, 2004