This excerpt taken from the CHK 8-K filed Nov 1, 2005.
Consent of Independent Consultants
As independent oil and gas consultants, Schlumberger Data & Consulting Services hereby consents to the incorporation by reference in this Registration Statement on Form 8-K, to be filed with the Securities and Exchange Commission on or about November 1, 2005, of information from our reserve report dated February 12, 2005, entitled Reserve and Economic Audit of Proved Reserves of Certain Columbia Natural Resources, LLC Oil & Gas Properties as of December 31, 2004.
/s/ Joseph H. Frantz Jr.
Consulting Services Operations Manager, P.E.
October 31, 2005