摘要
利用钻井、高精度三维地震资料,结合地表露头,研究川西拗陷中段海相油气输导系统对油气运移、聚集的作用。川西拗陷中段海相不整合面输导系统主要存在于震旦系灯影组顶部桐湾期不整合面、二叠系底部加里东期不整合面、中二叠统顶部东吴期不整合面,中三叠统雷口坡组顶部印支期不整合面在部分地区存在。不整合面为油气侧向长距离运移提供了条件。断裂输导系统在中二叠统茅口组顶部最发育,雷口坡组顶部次之,灯影组顶部发育最少。断裂输导系统使天然气纵向长距离运移成为可能。天然气成藏可能与断裂输导系统的关系更为密切,深层形成的古油气藏在断裂输导系统的作用下沿断层向上运移至合适的储层内聚集形成次生油气藏。彭州雷口坡组气藏的形成可能就属于这种范畴。
The effect of marine conduit systems on petroleum migration and accumulation is studied by application of logging,high precision 3D seismic data and surface outcrops in the middle part of western Sichuan depression.The research shows that the marine unconformity surface conduit systems in the middle part of western Sichuan depression mainly exist at the top of the Upper Sinian Dengying Formation,the bottom of Permian,the top of the Middle Permian and in some regions,the top of the Middle Triassic Leikoupo Formation.It reveals that the unconformity surface conduit systems are responsible for the lateral migration of petroleum.Fault conduit systems are developed in Permian strata,Triassic Leikoupo Formation and the Upper Sinian Dengying Formation of Sinian and the fault conduit systems mainly control the longitudinal migration of petroleum.There is a closerelationship between the formation of marine petroleum accumulations and fault conduit systems.The petroleum from the ancient petroleum reservoirs formed in the deep layers are migrated to the appropriate shallow reservoirs through the fault conduit systems,forming secondary petroleum reservoirs,such as gas reservoirs in Leikoupo Formation at Pengzhou area.
出处
《成都理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2018年第1期68-80,共13页
Journal of Chengdu University of Technology: Science & Technology Edition
基金
"十三五"国家科技重大专项(2017ZX05005003-007)
中国石化前导性项目(P16109)
关键词
川西拗陷
输导系统
不整合面
沟源断裂
油气聚集
Sichuan Basin
conduit system
unconformity surface
fault
petroleum accumulation
