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通过对志丹油田旦八区大量岩心的观察及90多口井的单井沉积相、剖面相、平面相的分析研究,认为该区长3油组为一套三角洲平原沉积,可见到分流河道、天然堤和河漫沼泽三个微相.对研究区沉积微相展布特征进行了研究.结果表明,有利储集体为分流河道砂体,受沉积微相展布控制。
Through the observation of a large number of cores in Zhidan area of Zhidan Oilfield and the analysis of single well sedimentary facies, profile facies and planar facies in more than 90 wells, it is considered that the No.3 oil group in this area is a set of deltaic sediments, showing distributary channel , Natural dike and river diffuse swamps.The characteristics of sedimentary microfacies distribution in the study area have been studied.The results show that the favorable reservoirs are distributary channel sand bodies controlled by sedimentary microfacies distribution.