摘要
山西省沁水盆地石炭-二叠系含煤地层中暗色泥页岩广泛发育,通过整理以往钻孔资料、野外地质露头踏勘、钻孔岩心样品分析测试,分四个层段系统研究了沁水盆地页岩气储层的空间发育、有机地化及储层物性特征。结果表明:石炭-二叠系在研究区全区发育良好,具有厚度大、埋藏适中、有机质丰度高(TOC>1.5%)、热演化程度高(Ro平均为2.33%)、脆性矿物含量较高(平均34.5%)、含气性较好(平均0.90 m3/t)等特点,具备页岩气聚集成藏的有利地质条件,尤其是所划分的第Ⅱ层段大部分区域泥页岩厚度大于30 m,TOC含量分布均匀,页岩气富集特征最好。在此基础上,优选了沁水盆地石炭-二叠系页岩气有利区块,有利区潜在资源量达2.14×1012m3。
The dark argillutite is wide spread in Permo-Carboniferous coal-bearing strata in Qinshui Basin, Shanxi Province. Throughprevious drilling data review, field geological outcrop reconnaissance, drilling core sampling, sample analysis and test, systematicallystudied shale gas reservoir spatial development, organic geochemical and reservoir physical property features in Qinshui Basin in accor-dance with 4 sectors basis. The result has shown that Permo-Carboniferous is well developed in whole study area with features of largethickness, moderate buried depth, high organic matter abundance（TOC1.5%）, high thermal evolution degree（average Ro 2.33 %）,higher content of brittle minerals（average 34.5%） and better gas-bearing property（average 0.90 m3/t）. Thus have favorable geologicalcondition for shale gas accumulation and reservoiring. Especially, argillutite thickness in most area of the partitioned out sector II islarger than 30 m, TOC content well-distributed, shale gas enrichment features the best. On this basis, optimized Permo-Carboniferousshale gas favorable blocks in Qinshui Basin, and the potential resources can be 2.14×1012m3.
出处
《中国煤炭地质》
2016年第4期27-34,共8页
Coal Geology of China
基金
山西省煤炭可持续发展基金-山西省页岩气地质调查及评价项目(2156301)
关键词
石炭-二叠系
页岩气
资源潜力
沁水盆地
Permo-Carboniferous
shale gas
resource potential
Qinshui Basin
