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Analyse méthodologique et caractérisation multi-échelle des systèmes de fractures à l’interface socle/couverture sédimentaire – application à la géothermie (bassin de Valence, SE France)

Abstract : The Valence basin is a graben located in the Rhodanian corridor which belongs to the ECRIS system, and is the subject of many studies due to its geothermal potential. In response to its a multiphase history, fracture networks of the basement and sedimentary cover which are targeted for geothermal exploitation show a complex organization. This study aims to characterize facture networks organization in the Valence basin. It is based on seismic and borehole data in the basin, as well as geological maps, digital elevation model (DEM) and outcrops on the Ardèche margin. Two methodological studies were developed to characterize the orientation and length distributions. These methods allowed to determine fracture network modelling parameters, and highlighted a structural heritage but also a detachment between the basement and the cover.
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  • HAL Id : tel-02466297, version 1

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Arezki Chabani. Analyse méthodologique et caractérisation multi-échelle des systèmes de fractures à l’interface socle/couverture sédimentaire – application à la géothermie (bassin de Valence, SE France). Géomorphologie. Université Paris sciences et lettres, 2019. Français. ⟨NNT : 2019PSLEM046⟩. ⟨tel-02466297⟩

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