沁水盆地榆社-武乡区块煤系页岩气储层特征评价Assessment of Coal Measures Shale Gas Reservoir Features in Yushe-Wuxiang Block,Qinshui Basin
魏书宏,申有义,杨晓东
摘要(Abstract):
通过对沁水盆地榆社-武乡区块石炭-二叠系山西组-太原组富有机质泥页岩展布特征、地球化学特征以及储层特征进行分析认为,研究区富有机质泥页岩十分发育,连续性较好。TOC含量集中分布于1.5%~2.5%,干酪根以III型为主,热演化程度为高成熟—过成熟阶段,为好-优质的烃源岩。泥页岩矿物成分以黏土矿物和石英为主,黏土矿物主要为高岭石和伊蒙混层。页岩孔隙类型以黏土矿物粒间孔和有机质孔最为发育。泥页岩具有良好的吸附性能,页岩比表面积和孔隙体积有很好的正相关关系,表明研究区页岩具有较好的储集性能。优选的山西组-太原组页岩气有利区分布于研究区的北部及中部偏南一带,有利区内泥页岩累计厚度均在50m以上,TOC含量大于2%,构造较为简单,埋深适中,有利于页岩气的勘探与开发。
关键词(KeyWords): 煤系;页岩气;储层特征;沁水盆地
基金项目(Foundation): 山西省煤基重点科技攻关项目(MQ2014-02)
作者(Author): 魏书宏,申有义,杨晓东
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