Application of Optimal Technique of Shear-wave Velocity Prediction based on Xu-White Model

With the development of reservoir exploration, complex reservoir in complicated geological conditions has been the important exploration target. Pre-stack elastic wave impedance inversion is the effective way to resolve complex reservoir lateral prediction problem. However, there is no shear wave velocity information which is necessary for restricting and calibrating the pre-stack elastic wave impedance inversion result in many areas. In this paper, an optimal technique and its workflow was obtained for shear wave velocity predication using P-wave velocity and conventional logging data. The pseudo-porosity and nonlinear optimal algorithm were applied into Xu-White model. The validity of this technique is demonstrated by comparing the prediction results with measured shear wave velocity in China Bohai Bay. Then the technique was applied to restrict and calibrate the predicted S-wave velocity in an area of Congo. Subsequently, the good results of reservoir prediction were obtained using pre-stack elastic wave impedance inversion.