Communication Dans Un Congrès Année : 2017

Hydro-mechanical feed-back coupling in a full-filled fractured rock

Rachid Ababou
Israel Cañamón
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  • PersonId : 1358460
Alain Millard
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  • PersonId : 1147267
Tawfik Rajeh
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  • IdRef : 234789557

Résumé

We address Hydro-Mechanical (H-M) feed-back coupling in a fluid-filled fractured rock, whereby the hydraulic conductivity of the fractured rock is modified by its deformation. We present an upscaled description of this coupling based on previous work on tensorial macro-permeability (Kij) of fractured rock. The H-M feed-back coupling effects are expressed for the 2D case with fractures as straight line cracks, and for the 3D case with fractures as planar disc cracks. We assume at first that the deformable rock matrix remains impervious: feed-back effects are then due solely to crack deformation, while the effect of matrix deformation on Kij is neglected. The resulting tensorial H-M sensitivity coefficients, (K′ijkl) and (Φ′kl), are expressed explicitly. Extensions of this work are indicated in the conclusive section, e.g.: strain of the permeable porous matrix; thermal expansion; and combining all types of H-M couplings (stress/pressure/fluid production coupling, as well as feed-back coupling).
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Dates et versions

hal-04490155 , version 1 (05-03-2024)

Identifiants

  • HAL Id : hal-04490155 , version 1

Citer

Rachid Ababou, Israel Cañamón, Manuel Marcoux, Alain Millard, Tawfik Rajeh. Hydro-mechanical feed-back coupling in a full-filled fractured rock. 6th BIOT Conference on Poromechanics, Jul 2017, Paris, France. ⟨hal-04490155⟩
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