TY - GEN
T1 - Rock stiffness and permeability during crack opening and closure
T2 - 5th Biot Conference on Poromechanics, BIOT 2013
AU - Arson, C.
AU - Pereira, J. M.
PY - 2013/11/15
Y1 - 2013/11/15
N2 - A micro-macro model is proposed to study opening and closure of parallel crack planes in a porous rock. Pore Size Distributions (PSDs) of natural pores and cracks are updated with volumetric fractions, defined as distinct components of volumetric deformation. Deformation components depend on total deformation and on the crack density tensor (damage). The expression of the free energy postulated in the model allows capturing damage-induced anisotropy of stiffness. A unilateral condition of damage is introduced to account for stiffness recovery in compression. The permeability tensor is related to PSDs by combining Darcy's law and Hagen-Poiseuille flow equation. The model captures Planar Transverse Isotropy (PTI) induced by crack openings in both stiffness and permeability and predicts the evolution of two partial porosities (natural and damage-induced). The model will be used to model the damaged zone around underground cavities, faults and hydraulic fractures.
AB - A micro-macro model is proposed to study opening and closure of parallel crack planes in a porous rock. Pore Size Distributions (PSDs) of natural pores and cracks are updated with volumetric fractions, defined as distinct components of volumetric deformation. Deformation components depend on total deformation and on the crack density tensor (damage). The expression of the free energy postulated in the model allows capturing damage-induced anisotropy of stiffness. A unilateral condition of damage is introduced to account for stiffness recovery in compression. The permeability tensor is related to PSDs by combining Darcy's law and Hagen-Poiseuille flow equation. The model captures Planar Transverse Isotropy (PTI) induced by crack openings in both stiffness and permeability and predicts the evolution of two partial porosities (natural and damage-induced). The model will be used to model the damaged zone around underground cavities, faults and hydraulic fractures.
UR - https://www.scopus.com/pages/publications/84887351109
U2 - 10.1061/9780784412992.266
DO - 10.1061/9780784412992.266
M3 - Conference contribution
AN - SCOPUS:84887351109
SN - 9780784412992
T3 - Poromechanics V - Proceedings of the 5th Biot Conference on Poromechanics
SP - 2270
EP - 2279
BT - Poromechanics V - Proceedings of the 5th Biot Conference on Poromechanics
Y2 - 10 July 2013 through 12 July 2013
ER -