Compressibility and anisotropy effects in the processes of two-phase flow through a porous medium

Functions of the relative phase permeabilities which take into account the tensor nature of the relations between the absolute and phase permeabilities are constructed on the basis of experimental data. Problems of the displacement of gas by water and of water by gas in an orthotropic pore space are studied. The relative phase permeabilities obtained are compared with functions that depend only on the local saturation. The effect of the phase compressibility and the anisotropy of the absolute permeability tensor is considered.