Abstract: Big emotion well oilfield is located in the southern songliao basin in the central depression area in the middle of the changling sag, is the jilin oil field. Have a super Yi Dun Ji large lithologic reservoir group of reserve scale, because of the oil-bearing series is more; the workload is huge, to the objective interval in sedimentary facies sedimentary origin! The study of sedimentary structure characteristics and the lithology combination characteristics Low, thus unable to on the sedimentation rule of the work area of the whole system and comprehensive research, become the region the bottle neck of lithologic reservoir exploration and development.