Modeling of coupled deformation and permeability evolution during fault reactivation induced by deep underground injection of CO2

摘要: The interaction between mechanical deformation and fluid flow in fault zones gives rise to a host of coupled hydromechanical processes fundamental instability, induced seismicity, associated migration. In this paper, we discuss these general describe three modeling approaches that have been considered analyze stress coupling fault-instability processes. First, models were tested investigate behavior using different approaches, including slip interface finite-thickness elements with isotropic or anisotropic elasto-plastic constitutive models. results investigation showed can be appropriately represented the least complex alternative, element plasticity. We utilized pragmatic approach strain-permeability model study effects on instability during deep underground injection CO2. demonstrated how such applied determine likelihood reactivation estimate loss CO2 from zone. It is shown shear-enhanced permeability initiated where intersects zone plays an important role propagating enhancement through overlying caprock.