Based on the sedimentary conposition,tectonic evolution and basin simulation technology,the Carboniferous-Permian coalformed gas accumulation mode in Wen'an-Yangcun Slope,Jizhong Depression was analyzed.The results show that the coal seams and dark shale of the Benxi,Taiyuan and Shanxi Formations constitute valid source rocks.The reservoir distributes in the Carboniferous-Permian clastic sand and fine sand rocks,and the primary porosity is not developed,the reservoir space is dominated by secondary porosity.Coal seams,the purple mudstone and silty mudstone in the Shangshihezi Formation,Shiqianfeng Formation and Lower Triassic is the effective caprock.So there are valid source-reservoir-cap asemblages.The first hydrocarbon generation of the Carboniferous-Permian source rocks was in the late Triassic,and a limited amount of hydrocarbon was generated,no accumulation significance.The secondary hydrocarbon generation occurred in Shahejie Age,Paleogene when magma intrusion occurred and Neogene to now when plutonic metamorphism occurred,respectively.The structural traps in the area are mainly block faulted traps and anticline traps,which mainly formed in Kongdian Age to 1st member of Shahejie Age.The Oil-gas reservoir-forming conditions is good in Wen'an-Yangcun Slopes,and the storage conditions are controlling factors of the oil and gas reservoir.%基于沉积组合、构造演化和盆地模拟技术,分析了冀中坳陷文安-杨村斜坡石炭-二叠系煤成气成藏模式.结果表明:石炭-二叠系内部本溪组、太原组和山西组中煤层和暗色泥岩层构成有效烃源岩;储层分布于煤系砂岩-粉砂岩中,原生孔隙不发育,储集空间以次生孔隙为主;煤层、上石盒子组上部泥岩、石千峰组及下三叠统紫红色泥岩及粉砂质泥岩组成有效盖层,与储集层匹配形成储盖组合.石炭-二叠系烃源岩一次生烃发生在三叠纪末,生烃量有限,无成藏意义;二次生烃分别发生在古近纪沙河街岩浆热液侵入期和新近纪以来的深成变质作用发生期.区内圈闭主要为形成于孔店期-沙1期的断背斜和断块圈闭,成藏要素配置良好,保存条件是成藏主控因素.
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