三维重磁人机交互解释的剖面成体建模方法

Method of Building 3D Geological Model from Sections during Gravity & Magnetic Interactive Interpretation

由于重磁异常人机交互解释过程中三维地质体模型的构建和编辑操作在二维计算机屏幕上很困难,给物探解释人员带来很大的不便。该文提出了一种将各个剖面上多边形连接成体的建模方法,给出了该地质体模型的正演计算方法,并用VC 6.0与OpenGL在开发的三维重磁正反演解释系统中进行了实现。借助该方法,重磁解释人员可方便地编辑地质体模型并且可直观地进行三维显示,从而提高人机交互解释的效率。

A method of constructing geological models from sections during the process of 3D interactive interpretation for gravi ty and magnetic anomalies is presented. The method takes into account the different types of sections and the convenience of models＇ modification. After describing the steps of the method, the forward computation approach and the data structure of the model are discussed. This method is applied into 3D interactive gravity ~ magnetic anomalies interpretation platform which is realized by VCq-＋ 6.0 and OpenGL. Using this system, the magnetic data is inversed from one zone in Puxiong,Yunnan Province. The result gives the interpreter some useful information for inferring the existence of metallic ore in the deep. The main features of the method are the interpreter can edit the geological models easily and the system can give them a visual 3D shape.