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Changement d'échelle dans les modèles hydromécaniques couplés des réservoirs fracturés

Abstract : This study aims at providing a better description of the coupling effects between deformation and flow for the simulation of the production of fractured reservoirs. The modification of the initial equilibrium state of stress in the reservoir, due to hydrocarbon extraction and /or fluid injection, may lead both the porous matrix and the fracture network to suffer deformation. As the fractures usually constitute the preferentially flow pathways, their deformation may considerably affect the recovery of the resources in place. Simulations of fractured reservoir usually make use of homogenized and simplified description referred to "double porosity" model and assume a non-deformable fractured medium. We first develop a generalization of these models to the case of double porosity defolmable media building a fully homogenized hydromechanical model. Then, we both investigate estimations of the poromechanical coefficients for fractured media based on experimental behaviour laws of fractures and present a methodology for the actualization of the fracture permeability. In the framework of the industrial simulation of fractured reservoirs, a poromechanical simulator based on these results and a reservoir simulator are sequentially combined to satisfy the set of equations of mechanical equilibrium and flow. In this study, hydromechanical simulations reproduce the impact of the fracture closure and/or re-opening on recovery efficiency during primary and secondary production schemes of fractured reservoirs
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Rémy Marmier. Changement d'échelle dans les modèles hydromécaniques couplés des réservoirs fracturés. Autre. Institut National Polytechnique de Lorraine, 2007. Français. ⟨NNT : 2007INPL059N⟩. ⟨tel-01752825⟩

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