METHOD OF DETERMINATION OF MODIFIED FUNCTIONS OF RELATIVE PHASE PERMEABILITY FOR NONUNIFORM LAYER POROUS MEDIA Russian patent published in 1996 - IPC

FIELD: study of processes of multi-phase filtration of liquids, displacement processes, in particular, (displacement of oil from porous media by displacement agent) accompanied by determination of modified functions of relative phase permeabilities for nonuniform layer porous media. SUBSTANCE: average saturation by displacement agent, as well as average relative phase permeabilities of displacement agent and relative phase permeability of liquid being displaced are calculated according to permeability, porosity, power, saturation with bonded displacement agent and limiting saturation by displacement agent are determined for each interlayer; then modified functions of relative phase permeabilities are determined through determination of relationship between calculated average magnitudes of relative phase pemeability f displacement agent and relative phase permeability of liquid being displaced and average magnitudes of saturation by displacement agent. To enhanced reliability, viscosities of liquid being displaced and displacement agent, as well as their relative phase permeabilities are additionally determined relative phase permeabilities are additionally determined throughout entire range of change of permeability; average magnitudes of saturation by displacement agent and relative phase permeability of displacement agent and liquid being displaced are calculated according to results of mathematical modelling of filtration in nonuniform layer porous medium taking into account experimental data determined additionally. EFFECT: enhanced reliability. 3 dwg, 1 tbl