通过对姬塬油田西湾井区10口井的岩心观察、粒度分析、沉积构造特征分析及100口井的平面展布、剖面分析、单井相分析、查明该研究区域为三角洲前缘亚相沉积,对沉积微相进行进一步细分研究,表明该研究区域主要发育水下分流河道,其次为水下分支河道边缘以及河口坝。 Through the core observation, grain size analysis, sedimentary structural characteristics analysis and the plane distribution, section analysis and single-well facies analysis of 10 wells in Xiyuan well of Jiyuan Oilfield, it was found that the study area is the delta front The sedimentary microfacies of the sedimentary microfacies are further subdivided, which shows that the study area mainly develops underwater distributary channel, followed by the edge of underwater branch channel and estuary dam.