1 EXHIBIT 23.1 CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS As independent public accountants, we hereby consent to the incorporation by reference of our report included in this Form 10-K into Apache Corporation's previously filed Registration Statements on Form S-3 (Nos. 33-53129, 333-39973, 333-57785, 333-75633, 333-90147 and 333-32580), Form S-4 (No. 33-61669), and Form S-8 (Nos. 33-31407, 33-37402, 33-53442, 33-59721, 33-59723, 33-63817, 333-04059, 333-25201, 333-26255, 333-32557, 333-36131, 333-53961 and 333-31092). /s/ Arthur Andersen LLP ARTHUR ANDERSEN LLP Houston, Texas March 24, 2000