At present, the understanding of turbidite fan sedimentary system on reservoir physical property of upper Es3 member in Western Chezhen sub⁃sag is scarce, especially the indirect influence of different sedimentary microfacies on reservoir physical properties by controlling diagenesis lacks systematic and regular knowledge. Based on the study of the overall sedimentary characteristics and the data of reservoir physical properties, casting thin section identification, X⁃ray diffraction analysis and core routine analysis, this paper studies the influence of three main sedimentary microfacies types on reservoir physical properties of turbidite fan system in Chexi depression. The results show that study area developes 4 kinds of diagenesis including compact and pressure solution, cementation, dissolution, metasomatism. There are 3 kinds of sedimentary micro⁃facies including braided channel, interchannel, and slump turbidite fan. Besides, there is not only direct effect micro⁃facies on diagenesis, but also indirect effect though dominate the distribution of diagenesis. By comprehensive consideration, three favorable oil⁃bearing blocks have been selected.

By means of logging response analysis, reservoir comprehensive analysis and analytic hierarchy process, the deposition of meandering river in the lower reaches of Minghua Zhen group in the two Zhuang oilfield is studied. The control and influence on residual oil for different levels of meandering river reservoir architecture for single river channel, point bar and the inner configuration unit of point bar are analyzed through log response analyses, reservoir analyses and arrangement analyses method based on the research of meandering river reservoir architecture at extra-high water cut development period.