西南石油大学学报（自然科学版）2016，Vol.38Issue(4)：27-36,10.DOI:10.11885/j.issn.1674-5086.2014.11.07.01
乌石凹陷东区古近系断裂系统与油气成藏
Palaeogene Fault System and Hydrocarbon Accumulation in East Wushi Sag
摘要
Abstract
Paleogene complex fault system has always been a key factor in the success of oil and gas exploration in East Wushi Sag. In this article the time of faults movement,their classification and the structural evolution are studied. The results show that the evolution of East Wushi sag can be divided into weak rifting stage in Paleocene-Early Eocene,strong rifting stage in Middle-Late Eocene and strike-slip weak stretching stage in Oligocene. Besides,3 sets of fault systems can be recognized:the early fault system formed in Changliu Formation to Liushagang Section 3 Formation sedimentary stage(T100 T86),the late fault system formed during Liushagang Section 2 Formation to Weizhou Formation sedimentary stage(T83 T60)and succession fault system formed in all the Palaeogene time(T100 T86). In addition,stretching structure,strike-slip structure and inversion structure have been found in study area. While the tectonic controls on the distribution of source rock and the filling evolution of sediment systems has been discussed,as well as the fault activity impacts on the trap formation,distribution,and the accumulation of hydrocarbon. Based on the analysis of the elements of reservoir formation,the central uplift and the north tilted fault block are the favorable prospecting areas. And the research has some guidance and reference value for the future oil and gas exploration,target evaluation and preference,and geological research.关键词
乌石凹陷/断裂系统/构造演化/构造样式/油气成藏Key words
Wushi Sag/fault system/tectonic evolution/structure style/hydrocarbon accumulation分类
能源科技引用本文复制引用
胡德胜,邓勇,张建新,左倩媚,何卫军..乌石凹陷东区古近系断裂系统与油气成藏[J].西南石油大学学报（自然科学版）,2016,38(4):27-36,10.基金项目
“十二五”国家重大专项课题（2011ZX05023006004）。 （）
