Abstract: Seismic data are widely used in oil and gas exploration and development. By modeling the complex geological structure revealed by the seismic interpretation results through the three-dimensional (3D) visual query and display, we may effectively acquire the information for decision making in the process of marine oil and gas exploration and development. In this paper, we made a thorough study on the construction of 3D model and its visualization for some geological bodies in some key areas of China seas. A 3D geological modeling and visualization software based on Open Inventor platform is adopted, and the procedure to establish the model discussed. The application of the model indicates that the 3D model for geological bodies based upon interpreted seismic data has a high value in application.