三维地质断层信息空间形态可视化方法仿真

Simulation of Spatial Shape Visualization Method of 3D Geological Fault Information

针对当前方法在对断距较大或较小的地质断层进行三维可视化建模时存在较大局限性,且建模结果与实际情况误差较大的问题,提出了基于虚拟钻井的三维地质断层信息空间形态可视化建模方法.方法将地质断层横截面视为厚度为零的空间几何曲面,在获取地质断层信息基础上,采用三角网来描述地质断层特征的空间分布,对地质断层横截面进行数据拟合,并对地质断层横截面网格进行插值拟合;采用NURBS曲面对上述通过插值计算得到的地质断层横截面网格进行进一步处理,可以获得逼近真实研究区域的地层曲面,并通过对地质断层横截面和地层面分割、调整、相互贯穿处理和交切判断生成最终的三维地质断层信息空间形态可视化模型.选取某实验区地质体作为研究对象,通过采集相关数据建立实验区域地质断层信息空间形态可视化模型,结果表明,所提方法降低了建模复杂度,提高了可视化建模的准确性,缩小了与实际情况之间的误差.

This article puts forward a visualization modeling method of spatial form of three-dimensional geological fault information based on virtual drilling. This method regarded the intersecting surface of geological fault as the spatial geometric surface with zero thickness. On the basis of geological fault information,the triangular network was used to describe the spatial distribution of geological fault features. Moreover,our method fitted the data of intersecting surface of geological fault and interpolated the mesh of intersecting surface of geological fault. The method used NURBS surface to further process above mesh of intersecting surface of geological fault obtained by interpolation,so that the stratum curved surface approaching the real research area was obtained. On the basis of this,the final three - dimensional visualization model of spatial form of geological fault information was generated by segmentation,adjustm ent,interpenetration and intersection judgment for the intersecting surface and stratum surface of geological fault. Taking a geological body in a simulation area as the research object,we could build the visualization model of spatial form of geological fault information in the simulation area by collecting relevant data. The results show that the proposed method reduces the modeling complexity,improves the accuracy of visualization modeling and reduces the error between the actual situation and the proposed method.