Applying two-grid method on unstructured tetrahedra to study fault stability and surface deformation in multiphase geomechanics

Abstract

In an earlier work, we introduced the two-grid method for unstructured tetrahedra applied to staggered solution of coupled flow and poromechanics and demonstrated its accuracy for the benchmark Mandel’s problem. In this work, we employ the two-grid method to study surface deformation and fault stability in a field scale carbon storage project.