【摘要】 为查明淮南煤田煤系致密砂岩气赋存,通过测井解释成果分析,深入剖析了淮南煤田煤系砂岩气的含气性分布特征。研究结果表明:淮南煤田砂岩气主要赋存于二叠系煤系地层的粉砂岩中,不同钻孔显示砂岩气储层层数不等,潘三矿没有砂岩气储层,丁集矿致密砂岩气储层从含气层-气水同层-低产气层-气层的层数从4层到至9层,含气层数及富气差异程度明显,石炭系没有明显含气储层,没有砂岩气赋存;研究区二叠系砂岩气与煤系其它类型成因气存在5种共生组合关系:顶部页岩气向下运移形成砂岩气、底部煤层气向上运移形成砂岩气、顶底部页岩气向中间砂体运移形成砂岩气、顶部煤层气和底部页岩气向中间砂体运移形成砂岩气、底部页岩气向上运移形成砂岩气。更多还原

【Abstract】 To identify coal measures compact sandstone gas hosting in the Huainan coalfield,through well logging interpreted result analysis,thoroughly analyzed sandstone gas gas-bearing distribution features in the coalfield. The result has shown that the sandstone gas is mainly hosted in Permian coal measures siltstone; the reservoir layer number is different in boreholes. In the Panji No. 3 coalmine is without sandstone gas reservoir; while in the Dingji coalmine,compact sandstone gas reservoir gas-bearing layer—gas-water layer—low yield gas layer—gas layer series number is from 4 to 9,and differences on gas-bearing layer number and gas-rich properties are obvious. In the Carboniferous strata have no obvious gas-bearing reservoir,without sandstone gas hosted. In the study area Permian sandstone gas and coal measures other typed gases have existed 5 paragenetic associations: top shale gas migrating downward; bottom CBM migrating upward; top shale gas migrating toward middle sand mass; top CBM and bottom shale gas migrating toward middle sand mass and bottom shale gas migrating upward to form sandstone gas.更多还原