一种基于TIN-CPG混合空间数据模型的精细三维地质模型构建方法

发布时间：2018-04-04 19:22

本文选题：不规则三角网(TIN)　切入点：角点网格(CPG)　出处：《岩土力学》2017年04期

【摘要】：精细三维地质模型的构建是实现地质体真三维可视化分析的难题之一。提出一种基于不规则三角网(TIN)和角点网格(CPG)的混合空间数据模型来构建三维精细地质模型的方法。首先建立基于TIN的构造-地层格架三维地质模型,然后进行TIN面元模型到CPG体元模型的转换,将基于TIN的构造-地层格架模型转换为基于CPG的精细网格体元地质模型,从而实现"表达上"精细三维地质模型的构建。在转换过程中首先要进行地层序列的定义,然后对空间格网进行划分,在此基础上计算格网中各个单元格的空间坐标和各个网格的有效性,并将计算结果存储为GRDECL格式文件,最后通过QuantyView3D系统读取该文件实现精细地质属性模型的展示。利用该方法对沿海某城市一个重点区域进行精细水文地质模型的构建,验证了其方法的可行性。
[Abstract]:The construction of fine three-dimensional geological model is one of the difficult problems to realize the true three-dimensional visualization analysis of geological body.A hybrid spatial data model based on irregular triangulation (tin) and corner grid (CPG) is proposed to construct 3D fine geological model.Firstly, the three-dimensional geological model of tectonic-stratigraphic framework based on TIN is established, then the transformation from TIN element model to CPG volume element model is carried out, and the structure-stratigraphic framework model based on TIN is transformed into a fine grid unit geological model based on CPG.In order to achieve the expression of fine three-dimensional geological model construction.In the process of transformation, the stratigraphic sequence should be defined first, then the spatial grid should be divided, and then the spatial coordinates of each cell in the grid and the validity of each grid should be calculated, and the result should be stored as a GRDECL format file.Finally, the fine geological attribute model is displayed by reading the file through QuantyView3D system.The method is used to construct a fine hydrogeological model for a key area of a coastal city, and the feasibility of the method is verified.
【作者单位】：南阳理工学院软件学院;中国地质大学(武汉)资源学院;中国地质大学(武汉)计算机学院;中国地质大学(武汉)教育部长江三峡库区地质灾害研究中心;
【基金】：国家高技术研究发展计划(863计划)(No.2008AA121602)~~
【分类号】：P628

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