[Ryder Scott Letterhead]


                                                                    EXHIBIT 23.1


               Consent of Ryder Scott Company Petroleum Engineers


As independent petroleum engineers, we hereby consent to the incorporation by
reference in this registration statement of our Firm's review of the proved oil
and gas reserve quantities of Apache Corporation as of January 1, 2002, and to
all references to our Firm included in this registration statement.


                                          /s/ Ryder Scott Company, L.P.
                                          Ryder Scott Company, L.P.


Houston, Texas
July 30, 2002