A New Explicit Sequentially Coupled Technique for Chemo-Thermo-Poromechanical Modelling and Simulation in Shale Formations

A new explicit sequentially coupled technique for chemo-thermo-poromechanical problems in shale formations is developed. Simultaneously solving the flow and geomechanics equations a single step computationally expensive with consequent limitations on computations involving well or reservoir-scale geometries. The newly developed solution sequence involves temperature field within porous system. This followed by computation of chemical activity constrained previously computed field. pore pressure then coupling thermal effects but without consideration volumetric strains. geomechanical effect strain, stress tensors, associated displacement vectors fluid subsequently explicitly single-step post-processing operation. By increasing borehole to 20 MPa, it observed that rock velocities concurrently increase 50%. However, wellbore activities shows only slight fluid. In chemo-thermo-poroelasticity steady-state simulation, maximum displacements recorded Hmin Hmax are 0.00633 m 0.0035 m, respectively, 2D 0.21 3D simulation. transient values gradually over time corresponding decrease pore-fluid velocity. comparison this work partial two-way scheme commercial simulator test cases was carried out. differences between temperatures, values, 0.33%, 0.7%, 0%, respectively. analysed results, therefore, indicate comparatively accurate more efficient than running full scheme.