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本文综合砂岩岩石类型、岩心沉积结构、构造、古生物类型、沉积旋回特征、岩电组合特征、测井曲线特征等多种分析方法与技术手段的应用,对研究区延长组长7三角洲—湖相沉积体的沉积组成进行了系统分析,对研究区的沉积相进行了划分。砂体平面分布规律受控于沉积相带的横向展布,主要发育透镜体,在平面上形成一定规模的储集体,且储层非均质性强,主要沉积体系包含4种沉积亚相和9种沉积微相。
Based on the application of many analytical methods and technical means such as sandstone type, core sedimentary structure, structure, paleontology type, sedimentary cycle characteristics, lithological combination characteristics and logging curve characteristics, Sedimentary body sedimentary composition of a systematic analysis of the sedimentary facies of the study area were divided. The distribution of sandbody plane is controlled by the lateral distribution of sedimentary facies belt, mainly developing lens body, forming a certain size of reservoir in the plane and strong reservoir heterogeneity. The main sedimentary system contains 4 sedimentary subfacies and Nine kinds of sedimentary microfacies.