FIELD: oil and gas industry.
SUBSTANCE: invention refers to oil and gas industry and is designed for study of rock samples, selected from a porous medium crushed in a natural or artificial way. Porosity of studied rock fragments is measured by means of testing pressure of helium or any other gas in accordance with a known procedure. The chamber of fragments, containing the above said rock fragments, is connected to a reservoir of a known volume containing helium under a known pressure. At a balance of pressures the value of a hard volume can be calculated. Also mass of these fragments and circumflex volume of the studied rock fragments is measured. Combining in a certain way these measurements porosity as well as density of the studied rock samples is determined. Then their permeability is evaluated by means of drowning these fragments into liquid and connecting chamber with liquid initially contained in a special reservoir under a certain pressure to compress gas which is contained in pores of studied rock. By means of modeling of variations of volume of liquid supplied into the chamber and by means of the iterative correction the values of the said physic parameters are evaluated.
EFFECT: upgraded accuracy and simplicity of rock permeability and porosity evaluation.
14 cl, 13 dwg
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