COMSOL Formulation: Generally, for fluid flow system, the pressure distribution can be governed by the Darcy’s flow equation. Rock displacements can be measured from the “strains” mechanical governing equation. In this study both were coupled to check the combined effect from fluid flow and strain effect on the pressure distribution, total displacement and permeability changes observed. The geometry is simplified with 2D plot that contains three layers with the middle layer having a tighter permeability and was linked to the strain effects on both x and y directions as follows (23): The dimensions of each layer were: Nomenclature: K: permeability layer Width Height Thickness Kx: x-direction permeability 1 2000 1000 1 Ky: y-direction permeability K0: initial permeability 2 2000 100 1 Ex: x-direction strain 3 2000 1000 1 Ey: y-direction strain the figure 3.1 below shows this dimensions in a 2D view with pressure boundaries: Figure 3.1
COMSOL Formulation: Generally, for fluid flow system, the pressure distribution can be governed by the Darcy’s flow equation. Rock displacements “strains” can be measured from the mechanical governing equation. In this study both were coupled to check the combined effect from fluid flow and strain effect on the pressure distribution, total displacement and permeability changes observed. The geometry is simplified with 2D plot that contains three layers with the middle layer having a tighter permeability and was linked to the strain effects on both x and y directions as follows (23): The dimensions of each layer were: Nomenclature: layer Width Height Thickness 1 2000 1000 1 2 2000 100 1 3 2000 1000 1 K: permeability Kx: x-direction permeability Ky: y-direction permeability K0: initial permeability Ex: x-direction strain Ey: y-direction strain the figure 3.1 below shows this dimensions in a 2D view with pressure boundaries: Figure 3.1
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