牛庄洼陷砂岩透镜体成藏关键因素与富集条件研究  

Key Hydrocarbon Accumulation Factors and Enrichment Conditions of the Sandstone Lenses in Niuzhuang Sag

作　　者：刘明洁 季永承[1,2] 刘震 张旺[5] 渠芳 Liu Mingjie;Ji Yongcheng;Liu Zhen;Zhang Wang;Qu Fang(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500,China;Southwest Petroleum University,Chengdu,Sichuan 610500,China;China University of Petroleum(Beijing),Beijing 102249,China;State Key Laboratory of Petroleum Resources and Prospecting,Beijing 102249,China;Chinese Academy of Sciences,Beijing 100029,China)

机构地区：[1]油气藏地质及开发工程国家重点实验室,四川成都610500 [2]西南石油大学,四川成都610500 [3]中国石油大学(北京),北京102249 [4]油气资源与探测国家重点实验室,北京102249 [5]中国科学院,北京100029

出　　处：《特种油气藏》2020年第1期40-46,共7页Special Oil & Gas Reservoirs

基　　金：国家自然科学基金“成岩体系演化对致密砂岩储层流体-岩石相互作用的控制”（41872154）、“孔隙性砂岩地层中变形带非均质性研究”（41602157）、“砂岩储层致密过程定量研究”（41502147）

摘　　要：针对牛庄洼陷洼槽带浊积砂岩体油气成藏与富集区域存在较大差异的问题,从断层输导、成藏期储层古孔隙度及砂体-断层配置关系入手,对区内沙三中亚段砂体成藏与富集规律进行分析。研究结果表明:仅被单断层切穿的砂体油气无法成藏,只有同时被2条或多条断层切穿的砂体才能使油气有效成藏。具备成藏条件的砂岩透镜体,其成藏期古孔隙度越大越有利于油气富集。因此,至少被2条断层切穿且成藏期古孔隙度较大的砂岩体是研究区的有利勘探目标。该研究成果可为牛庄洼陷洼槽带砂岩透镜体进一步勘探提供理论指导。In order to clarify the great differences in hydrocarbon accumulation and enrichment zones of the turbidite sandstones in the Niuzhuang Sag zone,the sandbody hydrocarbon accumulation and enrichment patterns in the sub-member of middle Shahejie Formation were analyzed from fault conduction,paleo-porosity during hydrocarbon accumulation and sandbody-fault configuration.Result shows that it is incapable of hydrocarbon accumulation for the sandbody cut through with single fault.The sandbody shows an effective hydrocarbon accumulation only when it is cut through by two or more faults.The paleo-porosity during hydrocarbon accumulation period is favorable to the hydrocarbon enrichment for the sandstone lens with well hydrocarbon accumulation conditions.Therefore,the sandbodies with relatively high paleo-porosity and cut through by two or more faults are considered as the favorable exploration targets in this area.This research could provide certain theoretical guidance for the further exploration and sandstone lenses in Niuzhuang Sag.

关 键 词：砂岩透镜体 成藏关键因素 古孔隙度 富集条件 断层 沙三中亚段 牛庄洼陷 

分 类 号：TE122[石油与天然气工程—油气勘探]