METHOD OF DETERMINING RELATIVE PHASE PERMEABILITIES Russian patent published in 2024 - IPC G01N15/08 

FIELD: oil, gas and coke-chemical industry.

SUBSTANCE: invention relates to oil and gas industry, in particular to methods for determining relative phase permeability of oil and gas reservoirs, including low-permeability terrigenous reservoirs, and can be used for design and development of deposits. Method of determining relative phase permeabilities, at which: performing tomography of core samples; performing hydrostatic weighing of core samples; saturating core samples with water while controlling water saturation by means of hydrostatic weighing; creating residual water saturation in core samples; saturating core samples with residual water with kerosene, wherein volume of extracted water is measured; saturating core samples with recombined gas-saturated equilibrium oil with a contrast agent, wherein the volume of the extracted water is measured, and the saturation value of the core samples is determined by X-ray radiation; performing filtration at least at two speeds of recombined gas-saturated equilibrium oil with a contrast agent, or recombined equilibrium gas, or a mixture thereof, wherein the pressure gradient is kept at a value not exceeding the maximum pressure achieved when creating residual water saturation in the core sample, wherein the saturation value of the core samples is determined by means of X-ray radiation; determining relative phase permeabilities taking into account end effects.

EFFECT: high accuracy of determining relative phase permeability in low-permeability rock samples.

20 cl, 3 dwg