1 EXHIBIT 23.5 [NETHERLAND, SEWELL & ASSOCIATES, INC. LETTERHEAD] CONSENT OF INDEPENDENT PETROLEUM ENGINEERS AND GEOLOGISTS As independent oil and gas consultants, Netherland, Sewell & Associates, Inc. hereby consents to the references to our firm and to our reserve report dated December 31, 1997 in the Transition Report on Form 10-K of Chesapeake Energy Corporation incorporated by reference into the Prospectus constituting part of the Registration Statement on Form S-4 of Chesapeake Energy Corporation to be filed with the Securities and Exchange Commission on or about June 19, 1998. NETHERLAND, SEWELL & ASSOCIATES, INC. By: /s/ FREDERIC D. SEWELL ---------------------------------------- Frederic D. Sewell President Dallas, Texas June 19, 1998