Abstract: CH-2 area is located in beach area of Dagang Oilfield, where the special geological environmental results in difficulty in data acquisition and only a few wells scatter. To build model on this condition, this paper puts forward the geological modeling idea based on seismic data. It mainly depends on the three-dimensional seismic data and the predicting results of logging reconstruction and constrained inversion, using stochastic modeling, to predict distribution of reservoir sand bodies between wells and variation of reservoir properties, and to establish high-precision three-dimensional geological model of reservoir. This approach greatly reduces uncertainty of cross-well reservoir prediction and risk in development, and simultaneously provides good reference for precise reservoir evaluation in similar work area.