长治区块煤层气赋存特征及控气因素

wf(2016)

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Abstract
沁水盆地长治区块现处于开发初期,煤层气资源条件较好,产能潜力大。依据现有地质资料和测试数据,对该区块煤层气赋存特征及控气因素进行了分析,认为区内煤储层吸附、解吸能力强,吸附时间短,但储层渗透率低。区块内含气量自东北到西南逐渐降低,主要受控于埋深、顶板厚度和地质构造条件,表现为:随埋深和顶板泥岩厚度的增加含气量降低;正断层附近煤层含气量随远离断层面而升高,同一断层上盘较下盘更利于煤层气封存,向斜轴部含气量高于翼部,背斜构造则反之。
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Key words
Changzhi block,CBM,reservoir physical property,gas-controlling factor
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