三维地质结构模型精度评估理论与误差修正方法研究

三维地质模型精度评估与误差修正问题已成为制约三维地质模拟技术深入发展应用的瓶颈。在综合国内外研究现状与发展趋势的基础上,提出了三维地质结构模型精度评估、误差检测、动态修正的总体研究框架。在模型精度评估方面,提出分别构建三维地质结构模型精度评估的一般理论模型、面向特定地质体的实际操作模型和地质结构构造不确定性的三维空间分布模型的研究思路,指出应重点研究地质实体自身特性、三维地质建模方法对三维地质结构模型精度的影响,解决由一般地质界面的内插误差和特殊地质体的外推误差引起的精度评估问题。在模型误差修正方面,提出基于建模初始数据的模型误差修正方法和基于建模中间结果的模型误差修正方法,在具体实现时,引入“数据 模型的可视化交互技术”。这些研究成果为建立一套完整的三维地质结构模型精度评估与误差修正的理论体系和方法体系奠定了基础,有助于完善复杂地质条件下三维地质模拟的方法与技术。

Theory of accuracy assessment and methods for error correction in 3D geological structure models.

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.