柳屯-海通集环洼带油气成藏条件及勘探潜力

柳屯一海通集洼陷是东濮凹陷继承性发育的第二大生油洼陷，生油岩厚度大、分布面积广、生油强度高．为柳屯一海通集环洼带和西部斜坡带油气藏形成与油气富集奠定了良好的资源基础；区内发育的多条Ⅲ级大断层及其配套、派生的次级断层都对不同层系的油气富集有明显的控制作用；由于靠近西部物源．所以具有多种类型的沉积体系和组合特征．储集砂体类型多．同时在洼陷内部深层存在高压异常带．其保存的有效储层有利于深层油气成藏；地层沉积稳定，砂泥岩成组性好．盖层条件优越；多种类型圈闭发育．油气保存条件好。通过对该区带油气成藏的地质条件的分析，认为西部断阶带一台阶、文西断层下降盘的反向屋脊带、刘庄构造带是下步勘探的主要方向和目标。

Oil and Gas Forming Conditions and Exploration Potential in Liuton-Haitongji Ring Depression Belt

Liuton-Haitongji Depression is the second large source depression of successional development of Dongpu Depression with big thickness of source rock, wide area of distribution, high strength of oil source, which is a good foundation of resources of Liuton-Haitongji depression belt and as well as hydrocarbon forming and enrichment in the west slope; oil and gas enrichment in different strata is obviously controlled by multiple grade II major faults and their matched and induced secondary faults. Because of the source to their west, they are multiple types of sedimentary systems and combination characteristics and many types of reservoir sandbodies. At the same times in the abnormal high pressure zone existed in the deep layer within the depression, the effective reservoir preservation is beneficial to deep hydrocarbon reservoir formation; deposition is stable in the stratum, composition property is good for sand-shale and cap rock condition is beneficial and multiple traps are developed. Conditions for oil and gas preservation is good. Through analysis of geologic conditions of hydrocarbon formation in the area, it is considered that the first step of the west fault-step belt, the reversed roof belt in the downsthrow of Wenxi fault, Liuzhuang structural belt are the main directions and targets for the next exploration.