... Abstract While there is significant evidence for healing in natural faults, geothermal reservoirs, and lab experiments, the thermal, hydraulic, mechanical, and chemical interactions that influence healing are poorly understood. We present preliminary results of triaxial slide-hold-slide...

... ABSTRACT: Characterization of rock permeability change during the fracture network evolution is critical to the design and assessment of geological storage facilities. Under geo-storage conditions, rock fractures propagate during damage processes and re-bond during healing. However, natural...

... of permeability increase from each reactivation, following the long hold periods, is critically dependent on the degree of fracture healing achieved in each pre-slip hold period. Shear dilation and permeability enhancement only results following a threshold repose period. Permeability enhances continuously...

... mechanisms (Hirata et al., 2014), is not included in this law. Therefore, the purpose of this paper is to develop a rational continuum constitutive model for sedimentary rocks based on critical state theory towards the prediction of the healing and decay effects of rock structure on both frictional...

... Abstract: In this study, we proposed a fabric-enriched Continuum Damage Mechanics model to investigate the coupled influence of damage and healing on the mechanical and transport properties of salt rock. In order to infer the form of fabric tensors, we carried out creep tests on granular...

... Abstract: A micro-macro chemo-mechanical model of damage and healing is proposed to predict the evolution of salt stiffness and deformation upon micro-crack propagation, opening, closure and rebonding, which is the result of pressure solution. We hypothesize that at a given grain contact...

... is a convenient damage indicator since it is directly accessible in the laboratory. On the other hand, it is well-known that rock salt can heal itself: Cracks can close due to viscous creep, and cohesion is restored by physicochemical processes on contact surfaces, such that over time, the damage induced by shear...

... Abstract This study aims to model anisotropic damage (i.e. increase of porosity and loss of stiffness) and healing (i.e. recovery of stiffness) in salt rock subject to microcrack initiation, propagation, and rebonding. We introduce enriched fabric tensors in a Continuum Damage Mechanics model...

... to microstructure changes are empirical. On the other hand, theoretical models of damage and healing disconnect thermodynamic variables from their physical meaning. The proposed model enriches the framework of Continuum Damage Mechanics (CDM) with fabric descriptors. In order to infer the form of fabric tensors...

... and significantly compromise security. In general, inelastic deformation in salt at conditions of geo-storage systems is dominated by isochoric dislocation processes, fluid-assisted Diffusive Mass Transfer (DMT), and dilatant micro-cracking. Rock healing is generally defined from the way it is measured...

... on implications for successful exploitation of fractured geothermal systems. hydraulic fracturing healing rate Upstream Oil & Gas strength Arma Usrm experiment geothermal reservoir friction granite healing mechanics Geophy evolution fracture deformation Reservoir Characterization shear...

... ABSTRACT: A continuum mechanics approach for treating damage healing is formulated as part of a constitutive model for describing coupled creep, fracture, and healing in rock salt. Formulation of the healing term is described and the constitutive model is evaluated against experimental data...