Création et modification de modèles géologiques par champs de potentiel. Application au modèle GeoChron

Abstract : One of the first steps when a geological study area is modelled in three-dimensional geomodelling software is to build the fault network. This can be tedious and time-consuming when fault geometry and branching are complex and difficult to locate from sub-surface data. The process of creating a three-dimensional structural model from various data types was entirely automated by using an implicit representation of fault surfaces by level sets computed on a tetrahedral mesh. Fault branching is detected automatically and surfaces with coherent contact geometry are built. Using level sets for fault surfaces also enables easy editing of the fault network while maintaining the geological consistency of the model. A further tetrahedral mesh editing technique was developed during this PhD in order to modify mesh geometry close to faults. New information or interpretations or perturbations which represent geometrical uncertainty on faults can thus be integrated to the geological model
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Anne-Laure Tertois. Création et modification de modèles géologiques par champs de potentiel. Application au modèle GeoChron. Autre. Institut National Polytechnique de Lorraine, 2007. Français. ⟨NNT : 2007INPL032N⟩. ⟨tel-01752878⟩

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