从区域地质资料出发，利用岩石颜色、结构、沉积构造、砂体形态以及沉积层序等岩心相标志， 结合测井曲线形态特征，研究靖安油田长2₁³ 地层的沉积微相。研究表明，工区目的层是一套辫状河下三角洲平原亚相沉积，发育有水下分流河道、水下分流河道间湾、水下天然堤以及水下决口扇等沉积微相，指出水下分流河道微相砂体是本区占主导地位的骨架砂体，为进一步勘探和开发目的层提供了地质线索。

Based on the regional geologic background, the rock color and texture, sedimentary structure, sand body distribution and sedimentary sequence combining with logging curves are applied to study the sedimentary microfacies of Chang 2₁³ in Jing’an Oilfield. The result shows that the target stratum in the study area is a suit of braided deltaic plain, consisting of underwater distributary channel, interdistributary bay, natural levee and crevasse splay, and that the underwater distributary channel sand bodies constitute the dominated reservoir, which provides geological foundation for the further exploration and development in the target stratum.