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基于对沉积序列中岩性及组合、沉积构造与结构、古生物特征、粒度分析、自然电位划分相等一系沉积相标志的研究,并结合区域地质背景,认为西峰油田董志区属于浅水三角洲沉积相,共识别出河口砂坝、水下分流河道、远砂坝、水下天然堤及分流间湾4种微相。长81期的主要沉积微相是水下分流河道,预测长81储层物性好于长82的。
Based on the study of lithofacies and assemblages, sedimentary structures and structures, palaeontology, grain size analysis and equal potential facies sign of a series of sedimentary facies in the sedimentary sequence, and combining with the regional geological background, it is concluded that Dongzhi area of Xifeng oil field belongs to shallow water delta sedimentary facies , Identified a total of four microfacies of estuary sand bar, underwater distributary channel, far sand bar, underwater natural dike and shunt bay. The main sedimentary microfacies of Chang-81 are underwater distributary channels, and the physical properties of Chang 81 reservoirs are better than that of Chang-82.