EXHIBIT 23.11

       CONSENT OF INDEPENDENT PETROLEUM ENGINEERS AND GEOLOGISTS

         We hereby consent to the incorporation by reference in the joint
proxy statement/prospectus constituting part of the St. Mary Land &
Exploration Company registration statement on Form S-4 (Registration No.
333-_______) of data derived from our reserve report dated April 9, 1999
relating to the oil and gas reserves of King Ranch Energy, Inc. at December
31, 1998. We also consent to the reference to our firm under the caption
"Experts" and elsewhere in such joint proxy statement/prospectus.


                                       NETHERLAND SEWELL & ASSOCIATES, INC.

                                       By:  /s/ Frederic D. Sewell
                                          -----------------------------------
                                          Frederic D. Sewell


Dallas, Texas
August 17, 1999