Exhibit 23.3 CONSENT OF INDEPENDENT PETROLEUM ENGINEERS AND GEOLOGISTS --------------------------------------------------------- We hereby consent to the incorporation by reference in this Registration Statement on Form S-3 of our reports dated March 13, 1997, March 14, 1997, and April 8, 1997, that were utilized in aggregate as a basis for United Meridian Corporation's Form 10-K for the year ended December 31, 1996, and to all references to our Firm included in this Registration Statement. NETHERLAND, SEWELL & ASSOCIATES, INC. By: /s/ DANNY D. SIMMONS -------------------------------- Danny D. Simmons Senior Vice President Houston, Texas May 27, 1997