Study on the Prediction Method of Shear Wave Velocity in the Saling Formation
Saling Formation is a sedimentary unit developed at the top of the Sartu oil layer in the Songliao Basin of Daqing Oilfield,with a wide oil bearing area and abundant oil and gas resources.The Saling For-mation reservoir is tight,with poor physical properties and has not been utilized.In order to provide a good guidance for its the high-quality exploration and development,it is urgent to study the prediction method of shear wave velocity in Saling Formation.According to the distribution characteristics on the plane,Chan-gyuan area is divided into 5 blocks from south to north.Based on the Xmac log and full-wave acoustic log data of 67 wells,the linear relationship and quadratic polynomial relationship are fitted by the least square method,and the empirical formulas of the P-S wave velocity in different blocks are obtained.The correla-tion index of linear relationship fitting is smaller than that of quadratic polynomial relationship fitting,and the predicted value of quadratic polynomial relationship is closer to the measured value.The shear wave ve-locity can be predicted by applying the empirical formula of different fields,which compensates for the in-sufficient shear wave velocity data.Besides,it is meaningful to improve the interpretation accuracy of verti-cal stress and judge the fracture morphology after compression.
Changyuan areaSaling Formationempirical formula methodshear wave velocitycompres-sional wave velocity
国家科技期刊平台
NSTL
万方数据
