Study of Sedimentary Facies of Gao III Reservoir Group from Jiangqiao to Pingyang Eara

To recognize clearly how is distributed regular of sand body of Gaotaizi reservoir in the West slope,and guide exploitation of reservoir,the study is that according to results of analysis of lots of core samples and logging data,and combine with logging facies,to study sedimentary facies of Gao Ⅲ reservoir group in Jiangqiao area,Alaxin area and Pingyang area(from Jiangqiao area to Pingyang area) of the west slope of Songliao Basin.Features and condition of growth of sedimentary facies of Gao Ⅲ reservoir group from Jiangqiao area to Pingyang area have been found out,recognizing that there are two subphases included delta front and shore-shallow lacustrine and eight sedimentary facies.shore-shallow lacustrine sand dam microfacies,shore-shallow lacustrine mixing beach microfacies,shore-shallow lacustrine mud,subaqueous distributary channel microfacies,river mouth bar microfacies,distal bar microfacies,delta front sheet sand microfacies,subaqueous interdistributary channel microfacies.Further Jiangqiao area to Pingyang area are controlled by qiqihaer soure and west yingtai source,sand body of delta front is relatively development;there isn't source supplied in Alaxin area,shore-shallow lacustrine relatively developed,thickness of sand body is rather thinner.Developing sand uplift piching traps and sand lens traps.