Sedimentary characteristics of Xin'an village group's 3D seismic zone in Fangzheng fault depression

Using the cores from 6 wells,logging data,heavy minerals and 3D seismic data from Yishu graben section of Fangzheng fault depression,we have studied the sedimentary facies characteristics of Xin'an village group's oil display section in Fangzheng fault depression and found three sedimentary facies: Fan deltaic facies,lacustrine facies and lake-bottom fan facies,five sedimentary sub-facies: they are fan deltaic plain subfacies,fan deltaic front subfacies,front fan deltaic subfacies,shore-lacustrine subfacies,and half depth-lacustrine subfacies;nine sedimentary micro-facies: distributary channels,between-distributary channels,underwater distributary channels,river mouth bars,sand sheets,sandy beach bar and mud bar.