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根据蠡县斜坡研究区古近系断层油气藏分布特征和含油气性特征,探讨了古近系断层油气藏成藏的主要控制因素。研究认为蠡县斜坡断层油气藏具有烃源岩、断裂、有利储集相带和输导体系联合控藏的特点。古近系油藏主要围绕生烃洼陷呈带状分布;发育于斜坡中外带的北东向早期断对油气主要起遮挡聚集作用,发育于斜坡中内带的北东向晚期断层对油气主要起输导作用,也有部分晚期断层聚集成藏;油气藏主要分布在三角洲前缘相和河流相砂体中;由斜坡中低部位的断层垂向输导通道和鼻状构造砂体横向输导通道组成的断层-砂体复合输导体系是蠡县斜坡中南部主要的油气输导体系类型。
According to the distribution characteristics and hydrocarbon-bearing characteristics of the Paleogene fault reservoirs in the Yixian slope research area, the main controlling factors for the hydrocarbon accumulation in the Paleogene fault reservoirs are discussed. The study shows that the slope fault reservoirs in Yixian County have the characteristics of joint control of source rocks, faults, favorable reservoir facies belts and transmission systems. The Paleogene reservoirs are mainly belt-shaped distribution around hydrocarbon generating depressions. The NE-trending early faults in the middle and late belt of the slope mainly obstruct the accumulation of oil and gas. The NE-trending late faults developed in the inner belts of the slope mainly influence the hydrocarbon And some late faults accumulate and accumulate. The oil and gas reservoirs are mainly distributed in the delta front facies and fluvial sand bodies. The vertical conduction channels and the nose-shaped sand bodies in the middle and lower parts of the slope transversally guide The fault-sand composite transport system composed of channels is the main type of oil and gas transport system in central-southern slope of Yixian slope.