Sedimentary Microfacies of the First Member of Shahejie Formation in Pucheng Oilfield,Dongpu Sag of Bohaiwan Basin

According to the research on the core and well logging data of the first member of Shahejie Formation,this paper analyzes the sedimentary characteristics and distribution of the sedimentary microfacies of the area.Delta facies and lake facies are developed in the research area.The delta facies developed subsea river channel,mouth bar,distal bar,frontal sand sheet and predelta mud microfacies;Lake facies developed shallow-lake beach sand,shallow-lake sandbar and shallow-lake mud microfacies.The sedimentary mode and the sedimentary characteristics are established on the basis of considering the macrocosmic depositional setting and the microcosmic sedimentary characteristics.