Abstract: Wangji Oilfield,a complex reservoir dominated by lithology and faults,is located at North-east part of northern slope in Beiyang depression.At later stage of oilfield development,water injection and remaining oil development is inefficient,lacking of cognition of reservoir and water-oil relation.Considering that sedimentary fatties has a control effect to reservoir and fluid movement,this paper makes analysis of sedimentary characteristics of corning wells including lithology,grain size,reservoir petrology and log feature,then carries out studies on distribution of sedimentary microfacies from the plane and profile,which has an important leading meaning to fine geological modeling and development adjustment of remaining oil.