基于地质统计学法的三维储量估算系统研究与应用

Realization and Application of 3D Reserves Estimation System Based on Geostatistics

在介绍地质统计学和三维地质建模知识的基础上,提出系统的设计思路:根据原始采样数据及边界品位在勘探剖面上构建二维轮廓线,在三维环境下通过交互式操作生成矿体实体模型;构建块体模型并用实体模型进行约束,标记矿体内的块体;用克里格品位估值算法对矿体内的块体赋品位值;最后统计计算储量。其中用到的关键技术包括变差函数自动拟合算法、交互式轮廓线拼接算法以及块体模型约束中用到的OBB树技术。该系统已经对某矿区数据进行了储量试算,结果与勘探报告一致。

On the basis of the theories of geostatistics and 3D geological modeling, the authors propose a designing model of 3D reservoir estimation system, that is constructing 2D contour lines on the prospecting line sections of the mineral body on the basis of the original data and the edge grade at first, and then establishing the orebody solid model through the contour mosaic calculation method; thirdly, defining the block model and constraining it using the orebody solid model; after the creation of the 3D block model, applying kriging interpolation to interpolate space attribute of the geological body; finally, computing the reserve estimation. The key techniques used in this system are the arithmetic of varigram auto fitting, the contour mosaic calculation method and the OBB tree technique in constraining block model. The system has been conducted in a real mineral area, and the result agrees with the actual reserves of the mine.