摘要
通过对沁水盆地水动场的分析,认为左权地区属弱径区;主要含水层与煤层的水力联系较弱,对煤层气成藏影响不大,大气降水对煤层气具有封堵作用,也有利于煤层气的保存。根据沁水盆地上石炭统—下二叠统泥页岩厚度统计,总的来看,沁水盆地含煤段泥岩相当发育;15号煤层的顶底板岩石的封闭性能好,为煤层气富集和开采的有利地区。
Through hydrodynamic field analysis in the Qinshui Basin, considered that the Zuoquan area belongs to weak runoff area and has no major impact to CBM deposit forming, while the atmospheric precipitation has plugging effect to CBM and in favor of CBM preservation. According to Qinshui Basin Upper Carboniferous to Lower Permian mudstone and shale thickness statistics, as a whole, mudstone is considerable developed in the basin＇s coal-bearing sector; No.15 coal roof and floor have good plugging performances, thus an area propitious to CBM enrichment and mining.
出处
《中国煤炭地质》
2008年第B09期40-43,共4页
Coal Geology of China
关键词
煤层气成藏条件
构造应力场
水动力场
盖层
封闭性能
高家庄区
CBM deposit forming condition
tectonic stress field
hydrodynamic field
cap rock
plugging performance
Gaojiazhuang
