鄂尔多斯盆地奥陶系储层演化与油气运聚  

THE EVOLUTION OF ORDOVICIAN RESERVOIR AND MOVEMENT-GATHERING OF OIL-GAS IN ORDOS BASIN

作　　者：王欣[1] 李振宏[1] 郑聪斌[1] 

机构地区：[1]长庆油田公司勘探开发研究院,陕西西安710021

出　　处：《天然气地球科学》2006年第1期114-118,共5页Natural Gas Geoscience

基　　金：国家重点基础研究发展规划"973"项目"鄂尔多斯盆地古生界大中型气田形成富集规律与有利勘探区带/目标优选"(编号:2001CB209104-5)资助

摘　　要：鄂尔多斯盆地奥陶系沉积时期处于“三隆二鞍一坳陷”的古构造格局,3个隆起共同控制着奥陶系的沉积体系,同时也控制着有利储层的最初展布状态。奥陶系沉积之后,鄂尔多斯盆地经历了长达1.3亿年的沉积间断,形成了广泛发育的风化壳岩溶储层。本溪期-早中三叠世,奥陶系顶面始终处于“中部隆、东西坳”的构造面貌,在中部隆起与东部坳陷之间存在一陡坡带,这一陡坡带对岩溶储层的后期演化具有决定性作用。晚三叠世,奥陶系顶面处于西北高、东南低的构造格局,最初生成的油气向盆地西北方向运移。中侏罗世,盆地东部逐步抬升,奥陶系顶面构造格局主要表现为东部高、西部低,生成的油气主要向盆地东部运移,早期生成的油气进行重新调整。The palaeo-structrual pattern of Ordovieian are three uplifts and two neks and one depress in Ordos basin. Three uplifts control together sedimentary system of Ordovician, at the same time control the development of the original reservoir. After sedimentary of Ordovician, sedimentary are interrupted about a hundred million years , karst reservoir developed widely. From benxi formation to middle Trias, the upand-down configurations of Ordovician weathered crust peak are very steady, namely high in the middle and bellow in the east. There are a abrupt slope between uplift and depress, it is important to evolution of karst reservoir. Irate trias, the up and-down configurations of Ordovician weathered crust peak are high on the west-north and low on the east south, oil gas moved to west-north. The middle Jurassic, the up-anddown configurations of Ordovician weathered crust peak are high on the east and low on the west, oil-gas adjusted again, moved to east.

关 键 词：鄂尔多斯盆地 奥陶系 沉积体系 构造界面 储层 油气运聚 

分 类 号：TE122.2[石油与天然气工程—油气勘探]