[Letterhead of Ryder Scott Company, L.P.]

                                                                    EXHIBIT 23.1

                      CONSENT OF RYDER SCOTT COMPANY, L.P.

      As independent petroleum engineers, we hereby consent to the incorporation
by reference in this Form 10-K of Apache Offshore Investment Partnership to our
Firm's name and our Firm's review of the proved oil and gas reserve quantities
of Apache Offshore Investment Partnership as of January 1, 2006.

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

Houston, Texas
March 8, 2006