Abstract:

 Accuracy assessment and error correction of 3D geological models has become a bottleneck that restricted the development and application of 3D geological modeling. Based on the review of the present situation and development trends in 3D geological modeling, we introduced a general research framework for the accuracy assessment, error detection and dynamic correction in 3D geological structure modeling. To evaluate the accuracy of 3D geological structure models, we proposed to establish the general theoretical model, the practical operating model oriented to the given geologic body and the 3D distribution model of spatial uncertainty for geologic structure, respectively. The research should focus on the influence of geologic features and 3D modeling approaches on the accuracy of 3D geological models, should solve the accuracy assessment problem that induced by the interpolation error of the popular geologic surface and the extrapolation error of special geologic entity. Two approaches for error correction of 3D geological structure models, called the originaldatabased method and interimmodelbased method, are presented. To implement those approaches, the visual interactive technique of modeling data and 3D model was adopted. This research laid a foundation to build the theory and method system for accuracy assessment and error correction in 3D geological models, and also is helpful in improving the 3D modeling techniques under complicated geologic conditions.

Key words:

Key words: 3D geological modeling; structure model; accuracy assessment; error correction; complex geologic body