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综合分析研究区各类相标志资料——岩心、古生物、电测曲线资料,判定延气2井区山2段为三角洲前缘沉积,识别出水下分流河道、分流间湾、间湾沼泽等沉积微相。水下分流河道为研究区最主要的储集体,是山2段油气勘探及开发的优势相带,其主体呈南北向和北东-南西向展布,其中山2-3亚段水下分流河道砂最发育,厚度大,且横向分布稳定,连片性好。
Comprehensively analyzing the data of all kinds of facies markers-core, palaeontology and electric measuring curve in the study area, it is determined that the second member of Shan 2 in Yanchang 2 well is the deposition of delta front, and the sediments of underwater distributary channel, shunt bay and inter bay breeze are identified Micro-phase. The submarine distributary channel is the most important reservoir in the study area and is the dominant facies belt for exploration and development of the second member of the Shan 2 Member. Its main body is distributed in north-south and north-east-south directions. The most developed river sand, thick, and the horizontal distribution of stability, continuity is good.