Abstract: The paper studies Ng²⁺³ sand sets, Ng⁴ sand sets, Ng⁵ sand sets, Ng⁶ sand sets, Ng^下 sand sets, and member of Kenxi Area in Zhanhua depression. It analyzes the sedimentary microfacies, and proves this zone can be divided into seven sedimentary microfacies: retention sediment, sand bar sediment, bend sand bar sediment, spontaneous bank sediment, burst fan sediment, sloping over sediment, and floodplain lake sediment. The reservoir is mainly made of channel full sediment, channel margin sediment,and floodplain sediment and the distribution of reservoir in this zone is dispersed, and the condition of reservoir formation is not ideal.