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《Geological Journal of China Universities》 2003-03
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Geological Analysis of Production History in Coalbed Methane Wells

HE Wei-gang and YE Jian-ping ( Beijing Campus , China University of Mine Technology, Beijing 100083, China; China United Coalbed Methane Corporation Ltd., Beijing 100011, China)  
Production data of 25 coalbed methane wells of Jincheng, Lu'an, Jiaozuo and Tiefa coalfields are used in a comprehensive study on permeability, gas saturation, condition of reservoir pressure drop-off, underground water system and energy system of coalbed methane reservoir. Four types of typical production curve in coalbed methane wells are recognized. The author believe that necessary reservoir conductions of high production coalbed methane well are high permeability (0.5 mD), high specific value of critical desorption pressure and reservoir pressure ( 0.6) and high gas saturation ( 80 %). Variable combination between coal seam and stratum may control directly coalbed methane production.
【Fund】: 国家“十五”科技攻关项目(2001BA605A-07)资助
【CateGory Index】: P618.13
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