Fully Coupled THM Formulations with two-phase fluid flow in naturally fractured media

A coupled formulation is developed, based on a dual-porosity model to simulate a naturally fractured aquifer under non-isothermal and two-phase fluid flow conditions.  Two-phase flow coupled to the deformation in a dual-porosity type media, and non-local equilibrium conditions are imposed for the energy transport between and among, respectively, two fluid and porous solid phases. Along and through them conductive and convective mechanisms may dominate. More importantly different physical parameters reflect different rock types and fracture characteristics are defined and interpreted so that the corresponding rock behaviors may be represented. Models and physical interpretations developed and proposed by different researchers are reviewed and compared. The model is applicable in reservoir simulation of naturally fractured formations with two-phase fluid flow,  safety design of co2 injection and sequestration, oil/gas storage injectivity or capacity evaluation, and heat extraction design in geothermal reservoir.