Application of log rebuilding technique in constrain inversion

The log rebuilding is a valid technology in improving the seismic inversion result of log constrained inversion for the areas with small velocity differences between the reservoir and the neighboring rock. The log rebuilding of the log constrained inversion and the integrated reservoir description has been made in Chengdao, Shengli Oilfield, and the liability of reservoir description has been improved by adding geological information in the course of inversion.The inversion results,together with geology recognition, actual drilling and logging information, have been used to describe 6 sand bodies and predict 2 sand bodies in main hydrocarbon layers. The drilling and formation testing confirmed its buried depth, thickness and distribution range.