Multirate Mass Transfer Approach for Double‐Porosity Poroelasticity in Fractured Media

Natural and anthropogenic fractured aquifers reservoirs are dual porosity matrix-fracture systems, where the fracture network provides highly–conductive flow pathways low–permeability matrix stores most of fluid. The coupling between mechanical deformation in media is often modeled using classical theory dual-porosity poroelasticity (DPP), based on Barenblatt's hypothesis pressure equilibrium inside rock blocks. Equilibrium can be expected if blocks small diffusion time comparable to scales along fractures. In practice, may large enough so that long, breaks down. Here, we study nonequilibrium effects coupled media. We compare analytical predictions modeling results heterogeneous porous theoretical analysis a nonequilibrium, model. use this (a) Reveal limitations DPP formulations. (b) Obtain scalings for drainage displacement highly heterogeneous, (c) Identify what behavior expect regarding deformation. observe strong tailing fluid fluxes land subsidence cannot captured by approach or single effective medium approach. show from multirate model high-fidelity models agree, even reproduce observed effects.