影响鸡西盆地煤层气赋存的地质因素  被引量:13

Impact of Jixi Basin coalbed methane occurrence of geological factors

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作  者:杜维甲[1] 

机构地区:[1]辽宁工程技术大学资源与环境工程学院,辽宁阜新123000

出  处:《辽宁工程技术大学学报(自然科学版)》2009年第2期189-191,共3页Journal of Liaoning Technical University (Natural Science)

基  金:国家自然科学基金资助项目(50374042)

摘  要:为了掌握鸡西盆地煤层气赋存的影响因素和规律,利用鸡西盆地钻井资料、瓦斯解吸资料、矿井瓦斯涌出量、瓦斯突出事故资料和大量样品测试资料,通过对盆地煤层煤化程度、埋藏深度、储层特征及地质构造分析,得出鸡西盆地内煤层埋藏较深、煤化程度高、生气量较大,煤层储层以微小孔为主、渗透率相对较差、不利于煤层气运移,瓦斯压力接近静水压力、围岩封闭条件较好、节理不发育、故煤层含气量大;构造对煤层气的赋存的影响主要表现在:一级构造单元中的隆起部位不利于煤层气富集,坳陷部位有利于煤层气富集,若坳陷内次级背斜核部缺失穆棱组上部地层含气量小,反之则变大。该成果对鸡西盆地煤层气开发具有一定的参考价值和指导意义。In order to grasp the influencing factor and the rule of coalbed methane in Jixi basin, this article makes use of the material in Jixi basin. Through the analysis of some factors in Jixi basin, this article arrives at the conclusions in Jixi basin as follows: the burial depth is deep, the coaled methane reservoir is preserved by micro eyelet primarily so it is not advantage for the coal bed methane to make the migration. The coal bed air content is big. The structure that make influence to the coal bed methane is mainly to display in those: in the first-level tectonic element, the bulge spot is not advantage for the coal bed methane to concentrate, if in the depression on the secondary arch core flaw mulling group, the stratum air content is small. This achievement has certain reference value and the guiding sense to the development in Jixi basin coalbed methane.

关 键 词:鸡西盆地 煤层气 控制因素 

分 类 号:TD84[矿业工程—煤矿开采]

 

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