川中蓬莱地区须家河组二段天然气富集规律  

Law of Natural Gas Enrichment in Second Member of Xujiahe Formation of Penglai Area, Central Sichuan Basin

作　　者：唐松 曹勤明 吕正祥[2,3] 

机构地区：[1]中国石油西南油气田分公司川中油气矿,四川遂宁 [2]成都理工大学能源学院,四川成都 [3]成都理工大学,“油气藏地质及开发工程”国家重点实验室,四川成都

出　　处：《地球科学前沿（汉斯）》2019年第3期129-137,共9页Advances in Geosciences

摘　　要：川中蓬莱地区上三叠统须家河组天然气储量丰富,勘探开发效果较好。须二段储层结构复杂,天然气富集规律尚不明晰,制约着下一步的勘探工作。本文从储层研究入手,通过物性、岩石学、孔隙结构特征等结合钻井勘探结果,对须二段储层结构及天然气富集规律进行综合分析,明确了控制天然气富集的主要地质要素。须二段储层超致密,孔隙结构复杂,储集空间主要为粒内溶孔。砂体、断层以及裂缝对天然气富集具有较强的控制作用。砂体规模决定了气藏的储量;断层影响生储盖组合,是成藏的关键因素;裂缝的发育程度控制有效储渗体的分布范围。There are abundant natural gas reserves of the Upper Triassic Xujiahe Formation of Penglai area,central Sichuan basin.Good exploration and development results have been achieved.The complex structure of reservoirs and the unclear natural gas enrichment law restrict the next exploration.It was started with reservoir,to analyze the reservoir structure and the natural gas enrichment law by physical property,petrological characteristics,pore structure and existing drilling exploration results.The controlling elements of the hydrocarbon accumulation were clarified by these ways in study area.The reservoirs in the second member of Xujiahe formation are tight sandstones with complex pore structure.The type of reservoir’s pore space is mainly intragranular dissolution pore.The natural gas enrichment is controlled by sand body,faults and fractures.The sand body scale determines the reserves of gas reservoirs.Faults affect source-reservoir-cap assemblage,which are the key factors of forming reservoirs.The distribution of effective reservoirs is controlled by the fracture growth level.

关 键 词：川中 上三叠统 须家河组 致密储层 天然气富集 

分 类 号：P61[天文地球—矿床学]