METHOD FOR DETERMINING THE COMPLEX OF PETROPHYSICAL PROPERTIES OF A ROCK SAMPLE WHEN MODELING RESERVOIR CONDITIONS Russian patent published in 2022 - IPC G01N15/08 E21B49/00 

FIELD: mining industry.

SUBSTANCE: invention relates to the field of petrophysics and can be used to determine the complex of petrophysical properties of a rock sample. Essence: a dry rock sample is placed in a core holder, saturated with gas and a complex of its petrophysical properties is determined. The all-round pressure is increased to a value exceeding the pore pressure, and the pore pressure is increased to the value of the pore pressure in the reservoir under study. The complex of petrophysical properties of a dry sample is determined. At a constant value of the pore pressure corresponding to the magnitude of the pore pressure in the reservoir under study, the all-round pressure is gradually increased to a value corresponding to the magnitude of the all-round pressure in the reservoir under study. At each stage, the complex of petrophysical properties of a dry sample is determined. The pore and all-round pressure is reduced to atmospheric pressure and the sample is evacuated. The sample is saturated with a liquid corresponding to the composition of reservoir water, and the complex of its petrophysical properties is determined. The all-round pressure is increased to a value exceeding the pore pressure in the reservoir under study, and the pore pressure is increased to a value corresponding to the pore pressure in the reservoir under study. The complex of petrophysical properties of a sample saturated with liquid is determined. At a constant value of the pore pressure corresponding to the magnitude of the pore pressure in the reservoir under study, the all-round pressure is gradually increased to a value corresponding to the magnitude of the all-round pressure in the reservoir under study. At each stage, a complex of petrophysical properties of a sample saturated with liquid is determined.

EFFECT: increasing the reliability of determining the petrophysical properties of the sample when modeling reservoir conditions.

1 cl, 2 tbl