Shengli Oil Field,the exploration of oil and gas in deeply buried strata has become the main direction of searching reserves,but a great breakthrough has not been made owing to the lower study degree.So it is very necessary to make a foundational study aiming at Kongdian Formation instead of old thought.In this paper,the seismic reflection corresponding to Kongdian Formation in DongyingHuimin Sag is regarded as an integral seismic sequence from the view of seismic stratigraphy,that can be divided into three subsequences corresponding to the three members of the formation.According to the characteristics of seismic reflection such as amplitude,continuity,interior structures and exterior shapes,seven seismic facies,including medium amplitude medium continuity and parallel or subparallel sheet facies,disorderly filling facies,disorderly progradation facies,hummocky facies,weak amplitude and medium continuity wedge facies,weakvariable amplitude and poor continuity wedge facies,and broom progradation facies,are recognized from the seismic reflection corresponding to Member 2 of Kongdian Formation which is prospective for oil and gas exploration.The sedimentary facies in the lake environment,including semideepdeep lake subfacies,shallow lake and shore subfacies,fandelta and subaqueous alluvial fan, etc., are identified from seismic facies.The favorable areas are identified.Some depositional areas of semideepdeep lake are found to be the important target regions.Some beneficial advices are proposed for further exploration.