摘要
受区域构造运动影响,车镇凹陷多次发生构造抬升与沉积间断,目前保存6期主要的地层不整合。车镇凹陷具有"双元地质结构",决定了古近系与前古近系分别具有不同的断裂体系和油气成藏条件,广泛分布的燕山期不整合面对油气的聚集成藏具有重要控制作用。不整合可改善下伏地层的储集物性,作为油气侧向运移的通道,并形成地层圈闭,提供油气聚集的场所。车镇凹陷发育三种类型的地层油气藏,潜山油气藏(基岩油气藏)、削蚀油气藏和超覆油气藏分别发育于不同的含油气层系,具有不同的成藏特征和分布规律。削蚀油气藏和超覆油气藏具有较大的勘探潜力,是车镇凹陷重要的勘探方向。
Affected by teetogenesis,there were several struc- tural elevations and depositional breaks in Chezhen sag. At present,six periods of main stratigraphic unconformi- ties are preserved.For the different fracture systems and reservoir forming conditions between Trertiary system and pre-Tertiary system,Chezhen sag has binary geologic structure,and the hydrocarbon accumulation and reser- voir-forming were chiefly controlled by the widely dis- tributed Yanshan unconformity surface.The unconformi- ty may improve the reservoir physical property of the un- derlying formation,which can act as the channels of the hydrocarbon lateral transportation,form the stratigraphic traps and provide the location for the hydrocarbon accu- mulation.There are three types of stratigraphic hydrocar- bon reservoirs in Chezhen sag,namely the buried hill hy- drocarbon reservoir(the basement hydrocarbon reser- voir),the stripped hydrocarbon reservoir and the onlap hydrocarbon reservoir,separately developing in the differ- ent oil-bearing series and having different forming char- acteristics and distribntion rule of hydrocarbon reservoir. For the preferable exploration potential,the stratigraphic stripped hydrocarbon reservoirs and onlap hydrocarbon reservoirs should be the main exploration direction for Chezhen sag in the future.
出处
《石油地质与工程》
CAS
2007年第5期16-19,共4页
Petroleum Geology and Engineering
关键词
车镇凹陷
地层不整合
不整合面
地层油气藏
Chezhen sag
stratigraphic unconformity
unconformity surface
stratigraphic hydrocarbon reservoir
