Chesapeake Energy 2010 Annual Report Download - page 60

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We engaged four third-party engineering firms to prepare portions of our reserves estimates comprising
approximately 78% of our estimated proved reserves (by volume) at year-end 2010. The portion of our
estimated proved reserves prepared by each of our third-party engineering firms as of December 31, 2010 is
presented below.
% Prepared
(by Volume) Principal Properties
Netherland, Sewell & Associates, Inc. ....... 58% Barnett Shale
Fayetteville Shale
Haynesville Shale
Mid-Continent (portions)
Permian and Delaware Basins
Ark-La-Tex (portions)
Lee Keeling and Associates, Inc. ........... 7% Mid-Continent
South Texas/ Texas Gulf Coast (portions)
Eagle Ford Shale
Data and Consulting Services, Division of
Schlumberger Technology Corporation .... 7% Marcellus Shale
Other Appalachian Basin
Ryder Scott Company, L.P. ................ 6% Mid-Continent (portions)
Copies of the reports issued by the engineering firms are filed with this report as Exhibits 99.1 - 99.4. The
qualifications of the technical person at each of these firms primarily responsible for overseeing his firm’s
preparation of the company’s reserve estimates are set forth below.
Netherland, Sewell & Associates, Inc.:
• over 28 years of practical experience in petroleum engineering and in the estimation and evaluation of
reserves
• a registered professional engineer in the state of Texas
• Bachelor of Science Degree in Petroleum Engineering
Lee Keeling and Associates, Inc.:
• over 45 years of practical experience in petroleum engineering and in the estimation and evaluation of
reserves
• a certified professional engineer in the state of Oklahoma
• Bachelor of Science Degree in Petroleum Engineering
Data and Consulting Services, Division of Schlumberger Technology Corporation:
• over 20 years of practical experience in petroleum geology and in the estimation and evaluation of
reserves
• registered professional geologist license in the commonwealth of Pennsylvania
• certified petroleum geologist of the American Association of Petroleum Geologists
• Bachelor of Science Degree in Geological Sciences
Ryder Scott Company, L.P.:
• over 30 years of practical experience in the estimation and evaluation of reserves
• registered professional engineer in the state of Texas
• Bachelor of Science Degree in Electrical Engineering
• member in good standing of the Society of Petroleum Engineers and the Society of Petroleum
Evaluation Engineers
14