Multi-scale Coupled Processes Modeling of Fractures as Porous, Interfacial and Granular Systems from Rock Images with the Numerical Manifold Method

Abstract The greatest challenges of rigorously modeling coupled hydro-mechanical processes in fractured rocks at different scales are associated with computational geometry. In addition, selections continuous or discontinuous models, physical laws, and coupling priorities based on geometric features determine the applicability a numerical model for certain type problem. this study, we present our multi-scale capabilities that have been developed manifold method analyzing rocks. Based their features, fractures modeled as continua—finite-thickness porous zones, discontinua—discontinuous interfaces microscale asperities granular systems. Different governing equations, priorities, approaches addressing fracture intersections shearing then applied to describe these. We these models simulate using realistic geometry obtained from rock images scales. first calculated single demonstrated impacts shearing. network rough fractures, demonstrating contact dynamics contribute significantly geometric, multi-physical evolution systems where not mineral filled. For discrete network, demonstrates can major impact stress pore pressure distribution. Lastly, complex system deformation band, band dominate dynamics, structural system.