DEM-LBM simulation of stress-dependent absolute and relative permeabilities in porous media

In this work, stress-dependent absolute and relative permeabilites in porous media are studied using the discrete element method lattice Boltzmann method. The change of permeability porosity during compaction is found follow a power-law relation. homogeneous pack agreement with prediction Carman-Kozeny equation. Porosity exponent increased due to existence vugs but decreased fractures. Relative permeability, on other hand, not only affected by pore structure compacted media, also properties fluids rock surface. Our simulations indicate that wetting phase increases slightly increasing stress, formation more continuous pathways. non-wetting phase, however, either or decreases depending viscosity ratio capillary number. It lubrication effects play an important role stress sensitivity permeability.