冀中坳陷古近系沉积构造特征与油气分布规律  

Sedimentary Structural Characteristics and Hydrocarbon Distributed Rules of Jizhong Depression

作　　者：张文朝[1] 杨德相[1] 陈彦均[1] 钱铮[1] 张超文[1] 刘会纺[1] 

机构地区：[1]华北油田分公司勘探开发研究院,河北任丘062552

出　　处：《地质学报》2008年第8期1103-1112,共10页Acta Geologica Sinica

摘　　要：依据冀中坳陷的沉积构造演化特征、地层发育和油气成藏特点,把冀中坳陷划分出12个凹陷和7个凸起。认为冀中坳陷古近纪经历了5个沉积演化阶段,发育两大成湖期和多种类型的储集体,形成了东西分带、南北分区的沉积构造格局。认为东西分带的沉积格局控制东富西贫的油气分布特点,源岩母质类型控制南油北气的分布特点,洼槽类型控制油气资源潜力和油气勘探前景,次级构造带控制油气藏类型、油气贫富程度和油气聚集带形成,以古潜山为主体的复式油气聚集带是油气聚集的主要形式。最终指出,冀中坳陷具有较大的油气资源潜力和良好的油气勘探前景,深化老区勘探是华北油田找油的必由之路。Based on the characteristics of sedimentary structural evolution, stratigraphic development and reservoir features of Jizhong depression, the study divides the Jizhong depression into 12 subbasins and 7 domes. Also, the Jizhong depression underwent 5 sedimentary evolutionary phases, resulting in the formation of two lacustrine lakes and multiple cumulative reservoirs. This formation further set up a pattern of EW-zonation and NS division of sedimentary structure, which is believed to control distribution of oil and gas. Source rock controls the NS distribution of hydrocarbon, while trough controls potential and exploration prospect of hydrocarbon resources. Secondary structural zones play an important role in type, richness and accumulation of hydrocarbon reservoirs. Compound hydrocarbon cumulative zone with ancient buried hill as its major body is the ideal place for hydrocarbon accumulation. It is concluded that the Yizhong depression is of exploration potential for hydrocarbon, and further exploration in this area is the only way to find hydrocarbon resources in North China.

关 键 词：冀中坳陷 构造单元 沉积构造特征 油气藏 复式油气聚集带 勘探前景 

分 类 号：P618.13[天文地球—矿床学]