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煤层气吸附时间是煤层气生产的一个重要参数 ,它直接影响煤层气井的产气速度和产气高峰到来的早晚。通过对影响吸附时间的因素的分析 ,作者认为 :煤阶、灰分、温度、显微煤岩类型、割理发育程度及煤样粒度等参数是影响吸附时间长短的最重要的因素。我国主要煤层气盆地的吸附时间一般为 0 .17～ 2 7.42d。吸附时间对产量的敏感性表明 ,中国的煤层气吸附时间对煤层气单井产量影响不大。
CBM adsorption time is an important parameter of CBM production, which directly affects the gas production rate of CBM wells and the arrival of production gas sooner or later. By analyzing the factors affecting the adsorption time, the author thinks that the parameters of coal rank, ash content, temperature, micro-coal rock type, degree of cleavage development and coal particle size are the most important factors affecting the adsorption time. The adsorption time of the main CBM basins in China is generally from 0.17 to 2 7.42 days. The sensitivity of adsorption time to production shows that the adsorption time of CBM in China has little effect on the single well production of CBM.