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Modélisation du comportement hydromécanique d’un versant calcaire poreux et fracturé. Impact de simplifications géométriques et d’une homogénéisation des propriétés hydromécaniques sur la qualité des prédictions

Abstract : This paper presents a numerical analysis of in situ well injection and pumping experiments carried out at the Coaraze Laboratory site with simultaneous fluid pressure and rock deformation measurements in boreholes. The Coaraze site is a small fractured and porous carbonate reservoir (decametric scale) that outcrops 30 km north of Nice. We have developed three-dimensional numerical approaches to simulate the hydromechanical behavior of major fractures and the surrounding equivalent continuous and porous medium that represents the intact rock and the other fractures. We have particularly focused on evaluation of the impact of geometrical simplifications and upscaling on the quality of the prediction of the reservoir hydromechanical behavior during hydraulic experiments. Including in the model a few “key” fractures that have important roles in fluid flow and deformation are shown to be as efficient as performing an upscaling of the fracture network.
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https://hal-ineris.archives-ouvertes.fr/ineris-01854310
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Submitted on : Monday, August 6, 2018 - 3:56:43 PM
Last modification on : Monday, October 12, 2020 - 11:10:22 AM

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Alain Thoraval, Frédéric Cappa, Yves Guglielmi. Modélisation du comportement hydromécanique d’un versant calcaire poreux et fracturé. Impact de simplifications géométriques et d’une homogénéisation des propriétés hydromécaniques sur la qualité des prédictions. Revue française de Géotechnique, 2016, pp.art. 3. ⟨10.1051/geotech/2016007⟩. ⟨ineris-01854310⟩

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