三维可视化在CSAMT勘探中的应用

CSAMT法是一种强有力的地球物理勘探手段,具有测量迅速、探测深度大、信噪比高等优点,已被广泛应用于金属矿、油气田、地下水、以及地热田的勘探中.在CSAMT勘探资料解释方面,传统的二维电阻率断面很难清晰、直观地揭示3D(三维)地电结构的分布特征,为此应加强3D可视化应用技术的研究.本文详细的介绍了3D可视化的建模过程,将3D构造的建模分为空间曲面剖分、空间曲面拟合插值、空间曲面拓扑关系生成、3D结构网格剖分、属性建模等过程.并以一个CSAMT勘探实例,展现出3D可视化方法技术的突出优势.三维可视化可以多角度、多层面展现地下3D电性结构的分布特征,使我们更加清晰、直观地了解3D地质体的空间范围与几何形态.

The application of 3D visualization in CSAMT exploration

CSAMT is a powerful geophysical method,because it possesses the advantage of rapid operation,big probing depth range,high signal-to-noise ratio.It has been widely used in lots of exploration fields,such as metal,oil and gas,groundwater,geothermal exploration.The traditional two-dimensional resistivity profiles in CSAMT exploration is difficult to show the characteristics of the real three-dimensional distribution of ground resistivity.So we should strengthen the application of 3D visualization.This article describes the modeling of three-dimensional visualization in detail,that can be divided into space surface fitting interpolation,surface physiccal processes,generating of surface topological relationships,three-dimensional mesh generation formation,property modeling and so on.And an instance of CSAMT exploration show the power of 3D visualization.Visualization can be a multi-angle,many details,multi-means show the distribution of underground resistivity,thereby making us more intuitive and detailed understanding of the distribution of geological and hierarchical situation,an accurate grasp of the scope of the distribution of anomalous body.