The sedimentary macro-facies characteristics of Xin'an village group in FangZheng fault area of YiShu graben

According to core,seismic,well log and logging data,utilizing the principles and methods of sequence stratigraphy and sedimentology to identify the sedimentary micro-facies characteristics of Xin'an village group in Fangzheng fault area of yishu graben.The result shows that the main type of the sedimentary micro-facies developed in Xin'an village group of Fangzheng area is distributary channels,underwater distributary channels,river mouth bars,sand sheets,shore-shallow lacustrine sandy beach bar and mud bar.Along the edge of the northwest fault to the midst of the fault,it has transition from fan deltaic plain subfacies,fan deltaic front subfacies to lacustrine facies in the plane,parts of the region has developed sublacustrine fan.Along the southeast fault to the middle has developed deltaic front subfacies and lacustrine facies,deltaic facies has developed in the north and lacustrine facies developd in the south.