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首页> 外文期刊>Computers & geosciences >3D geomodelling combining implicit surfaces and Voronoi-based remeshing: A case study in the Lorraine Coal Basin (France)
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3D geomodelling combining implicit surfaces and Voronoi-based remeshing: A case study in the Lorraine Coal Basin (France)

机译：结合隐含曲面和基于Voronoi的网格划分的3D地理建模：以法国洛林盆地为例

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摘要

In this paper we demonstrate how recent geomodelling techniques can be combined and used to build a 3D geological model on a real case study: the former coal mine of Merlebach (France), that is targeted to be exploited for low-temperature geothermal energy production. From geological maps, cross-sections, borehole and mine exploitation data, we build a 3D model in which are identified the rocks and infrastructures having significantly different permeabilities. First, a structural model of the main geological interfaces in our area of interest (2 horizons and 13 faults) is built with classical geomodelling techniques. Then, we propose to model by surfaces the 71 irregularly stacked, very close and very thin, sub-vertical coal beds. To ease their construction, we use an implicit method which represents 3D surfaces as isovalues of a scalar field defined in a 3D tetrahedral grid of the area. The corresponding triangulated surfaces are remeshed with a recently proposed method based on Voronoi diagrams so that the exploited parts of the coal beds, now filled by sand, can be computed. The 3D surface-based geological model, in which infrastructures can be inserted as piecewise lines, can be volumetrically meshed. It is available for download as supplemental material, as well as a volumetric grid.
机译：在本文中，我们演示了如何结合最新的地理建模技术，并在一个真实的案例研究中将其用于建立3D地质模型：原Merlebach煤矿（法国），其目标是用于低温地热能源生产。从地质图，横断面，钻孔和矿山开采数据，我们建立了一个3D模型，在其中识别出渗透率明显不同的岩石和基础设施。首先，使用经典的地理建模技术建立了我们感兴趣的区域（2个层位和13个断层）主要地质界面的结构模型。然后，我们建议对71个不规则堆积，非常紧密且非常薄的亚垂直煤层进行表面建模。为了简化其构造，我们使用隐式方法将3D表面表示为在该区域的3D四面体网格中定义的标量场的等值。用最近提出的基于Voronoi图的方法对相应的三角表面进行修整，以便可以计算出现在被沙子填充的煤层的开采部分。可以在体积上划分网格，其中可以将基础结构作为分段线插入的基于3D表面的地质模型。它可以作为补充材料以及体积网格下载。

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  • 来源
    《Computers & geosciences》 |2015年第4期|29-43|共15页
  • 作者

    Pauline Collon; Wendy Steckiewicz-Laurent; Jeanne Pellerin; Gautier Laurent; Guillaume Caumon; Guillaume Reichart; Laurent Vaute;

  • 作者单位

    GeoRessources UMR7359, Universite de Lorraine, CNRS, CREGU, ENSG, 2 rue du doyen Marcel Roubault, TSA 70605, 54518 Vandceuvre-les-Nancy Cedex, France;

    GeoRessources UMR7359, Universite de Lorraine, CNRS, CREGU, ENSG, 2 rue du doyen Marcel Roubault, TSA 70605, 54518 Vandceuvre-les-Nancy Cedex, France,BRGM, 1 avenue du Parc de Brabois, 54500 Vandoeuvre-les-Nancy, France;

    GeoRessources UMR7359, Universite de Lorraine, CNRS, CREGU, ENSG, 2 rue du doyen Marcel Roubault, TSA 70605, 54518 Vandceuvre-les-Nancy Cedex, France;

    GeoRessources UMR7359, Universite de Lorraine, CNRS, CREGU, ENSG, 2 rue du doyen Marcel Roubault, TSA 70605, 54518 Vandceuvre-les-Nancy Cedex, France,School of Earth, Atmosphere and Environment, Monash University, PO Box 28E, Victoria, Australia;

    GeoRessources UMR7359, Universite de Lorraine, CNRS, CREGU, ENSG, 2 rue du doyen Marcel Roubault, TSA 70605, 54518 Vandceuvre-les-Nancy Cedex, France;

    GeoRessources UMR7359, Universite de Lorraine, CNRS, CREGU, ENSG, 2 rue du doyen Marcel Roubault, TSA 70605, 54518 Vandceuvre-les-Nancy Cedex, France,BRGM, 1 avenue du Parc de Brabois, 54500 Vandoeuvre-les-Nancy, France;

    BRGM, 1 avenue du Parc de Brabois, 54500 Vandoeuvre-les-Nancy, France;

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  • 正文语种 eng
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  • 关键词

    Geomodelling; 3D surface-based model; Implicit modelling; Surface remeshing; Post-mining; Geothermics;

    机译：地理建模;基于3D曲面的模型;隐式建模;表面重塑;采矿后;地热学;

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