中央凸起变质岩古潜山内幕油气成藏条件  

HYDROCARBON RESERVOIR FORMING CONDITIONS WITHIN METAMORPHIC BURIED HILLS IN CENTRAL RISE

作　　者：王占忠[1] 

机构地区：[1]辽河油田分公司勘探开发研究院,辽宁盘锦124010

出　　处：《大庆石油地质与开发》2011年第4期9-13,共5页Petroleum Geology & Oilfield Development in Daqing

基　　金：中国石油天然气股份有限公司重点科技攻关项目“辽河探区有利预探区带综合评价和目标优选”（060105-2）资助.

摘　　要：以勘探程度较低的辽河坳陷中央凸起太古界变质岩潜山带为研究对象，总结了变质岩古潜山内幕油藏多层次分布特征。从潜山内幕储隔层岩性识别、构造特征、烃源岩、供油“窗口”、封盖体系等方面分析了古潜山内幕油藏形成的条件和主控因素，建立了变质岩古潜山内幕成藏模式。分析结果认为：裂缝发育受构造活动和优势岩性双重因素控制，变质岩古潜山存在多种岩性组合，可形成储隔层交替分布，古潜山侧向供油“窗口”是其内幕成藏的关键，供油“窗口”的幅度决定了纵深方向含油气范围。By focusing on the Archaeozoic metamorphic buried hill belt with low-degree prospecting in central rise of Liaohe Depression, the distribution characteristics of multileveled interior oil reservoirs in the hills are summarized , the oil reservoir forming conditions and main controlling factors of the hills are analyzed from the aspects of the lithologic identification of reservoirs and barriers, tectonic properties, source rocks of hydrocarbon, oil ＂window＂, sealing system and so on. And moreover, the reservoir forming model is established. The charging analyses re- suits show that, the development of fractures is jointly controlled by tectonic movements and dominant lithology. The alternate distribution of reservoirs and barriers is results from the existence of various lithologic combinations in metamorphic buried hills ; and furthermore the lateral oil charging ＂ window＂ is the key to the formation of interior reservoirs and its size determinates the vertical range of oil and gas pools.

关 键 词：变质岩 构造运动 裂缝性储集层 古潜山内幕油藏 中央凸起 辽河坳陷 

分 类 号：TE122.1[石油与天然气工程—油气勘探]