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Drilled core holes key to coalbed methane project. C. Willis. OGJ, 6 March 1995, 93(10), 73--75.

Details are given of an efficient system of drilling core holes for data followed by drilling, fracing, and producing gas wells which has helped develop economic quantities of coalbed methane. The Drunkards Wash project is described, and the coring programme, drilling operations, completion practices, and production operations are outlined.
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