现代地质Issue(5)：1032-1040,9.
辽河坳陷东、西部凹陷构造活动差异性对火山岩油气成藏的控制作用
Tectonic Activity Difference and Its Control on Hydrocarbon Accumulation of Volcanic Rock Reservoir in Eastern and Western Sags of Liaohe Depression
摘要
Abstract
The geological settings of Eastern Sag and Western Sag in Liaohe Depression are similar,but the volcanic reservoirs in Eastern Sag are much more abundant than that in Western Sag.According to the present research,mi-gration of the subsidence center and depocenter from West Sag to East Sag results in the diversities of tectonic evolu-tion between Western Sag and Eastern Sag,and finally leads to different reservoir accumulation conditions which are the key factors influencing oil accumulation in volcanics of Western Sag and Eastern Sag.Firstly,the oil and gas transporting system in Eastern Sag is better than that in Western Sag.Fault activities were different in the two sags.The fault systems in the Western Sag were active only in the early stage,while the fault systems in the East-ern Sag were active until the end of the Paleogene.Thus,the fault activity period could not match the accumula-tion period in Western Sag.Secondly,since the late Es4 stage,tectonic activities in Eastern Sag have become more intense than in Western Sag,and a lot of intrusive trachyte have developed in Eastern Sag.This kind of li-thology is easily reformed and then fissures generates,forming better reservoirs in Eastern Sag.Thirdly,different with Western Sag,in Eastern Sag volcanic rocks in Es3 stage are chiefly concordant intrusion along fault,distribu-ted as dikes,sills and laccolites,contacting directly with the source rocks which are convenient for oil migration.关键词
火山岩油气藏/油气富集/主控因素/构造活动差异/辽河坳陷Key words
volcanic rock reservoir/hydrocarbon accumulation/main controlling factor/tectonic activity difference/Liaohe Depression分类
能源科技引用本文复制引用
张江涛,吴智平,吕明针,于倩倩..辽河坳陷东、西部凹陷构造活动差异性对火山岩油气成藏的控制作用[J].现代地质,2014,(5):1032-1040,9.基金项目
国家科技重大专项大型油气田及煤层气开发（2011ZX05023-006-05）。 （）
