【摘要】 通过岩心观察和测井曲线分析确定岩石、岩相类型,结合测井相、骨架剖面微相及地震微相分析,对扶余油层4个砂层组的沉积微相展布及演化规律进行系统的研究。结果表明:扶余油层为曲流河、曲流河三角洲沉积体系,主要发育河床滞留沉积、点砂坝、河漫滩、水下分流河道与河口砂坝等沉积微相,其中曲流河道和水下分流河道砂体较发育,为物性较好的储集相带;伴随湖侵水体逐渐加深,河道逐渐由条带到开阔,砂体由零星到连片分布,河道弯曲逐渐萎缩,沉积相带由河流相过渡到河湖交互相。更多还原

【Abstract】 Through core observation and well-logging curve analysis,the types of the rock and lithofacies were determined.And combined with logging facies,matrix section microfacies and seismic microfacies analysis,sedimentary microfacies through-going and evolution laws of four sand formations for Fuyu oil-bearing layer were systematically studied.The results show that the reservoirs belong to meandering river-delta facies deposit,and it is further divided into some microfacies including gravel lag-deposit of in-channel,bar point,fluviatile flood-plain,underwater distributary channel and river mouth bar.The meandering river and distributary channel sandbody have the best reservoir property.In addition,the sedimentary facies changes from fluvial facies to river-delta facies with the lake transgression,the meandering river channel becomes much more broad and straight,and the sandbody changes from scattered spread to regional distribution.更多还原