柴达木盆地阿尔金山前东段输导体系及其控藏作用  

The transport system and its control on reservoir formation in the eastern front of the Altun Mountain,Qaidam Basin

作　　者：田光荣[1] 白亚东 裴明利[1] 李红哲[1] 孙秀建[1] 马峰[1] TIAN Guang-rong;BAI Ya-dong;PEI Ming-li;LI Hong-zhe;SUN Xiu-jian;MA Feng(Research Institute of Petroleum Exploration&Development-Northwest(NWGI),Lanzhou 730020,China)

机构地区：[1]中国石油勘探开发研究院西北分院,甘肃兰州730020

出　　处：《天然气地球科学》2020年第3期348-357,共10页Natural Gas Geoscience

基　　金：中国石油天然气股份有限公司重大科技专项“大中型岩性地层油气藏富集规律与关键技术研究”(编号:2016B-0301-1)资助。

摘　　要：柴达木盆地阿尔金山前东段供烃区位于南部的侏罗系生烃凹陷,源储距离较远,断裂和不整合是该区主要的输导体系,对油气成藏具有控制作用。断层输导性评价表明,近南北向断裂是该区主要的油源断裂,主要控制油气垂向运移,在成藏关键时期油源断层输导性控制油气差异成藏。"TR"不整合是该区最重要的区域角度不整合,可分为基岩不整合和侏罗系不整合2种类型,均发育3层结构,包括底砾岩层、风化残积层和半风化层,其中基岩风化残积层和半风化层具有较强的输导能力,主要控制油气的长距离横向运移。断裂和不整合配置关系可分为2种组合类型、3种组合样式,组合类型决定成藏模式,组合样式控制优势运移通道和油气富集。The eastern front of the Altun Mountain in the Qaidam Basin is located in the Jurassic hydrocarbon generation depression in the south of the basin,with a long distance between source and reservoir. The evaluation of fault conductivity shows that the near-north-south fault is the main oil source fault in this area,which mainly controls the vertical migration of oil and gas,and controls the differential accumulation of oil and gas in the key period of reservoir formation. The"TR"unconformity is the most important regional angle unconformity in this area,which can be divided into two types:Bedrock unconformity and Jurassic unconformity,all of which have three layers of structure,including bottom gravel layer,weathered residual layer and semi weathered layer. Among them,the weathered eluvium and the semi weathered layer of bedrock have strong transport ability,mainly controlling the long-distance lateral migration of oil and gas. The relationship between faults and unconformity can be divided into two types and three types of combination. The combination type determines the reservoir forming mode,and the combination type controls the dominant migration channel and hydrocarbon accumulation.

关 键 词：断裂 不整合结构 输导要素配置关系 优势通道 油气富集 

分 类 号：TE121.1[石油与天然气工程—油气勘探]