Abstract：Dongying Formation at east slope reservoir of Chengdao offshore oil-field of Shengli Oilfield imbeds deeply,its facies change quickly and usually have little difference of velocity with enclosed rock.So it is difficult to identify and calibrate single sandstone based on available 3D seismic data.And the distribution of reservoir cannot be found.In this paper we present our interior interface identification of Dongying formation cycle combined with drilling,logging and seismic data.Dongying formation cycle is divided into four sequences: S1,S2,S3 and S4.According to seismic wave group characteristics of sedimentary facies in Dongying formation,the paper reviews reservoir prediction based on seismic combined with geological information.The main procedures include sequence classification and interpretation,seismic faices interpretation,sedimentary body time window definition,reservoir prediction by clustering analysis without well controlled,and reservoir plane prediction with well controlled.With these integrated approach,good results are achieved in reservoir prediction in this area.
