METHOD TO DETERMINE VARIATIONS OF PARAMETERS OF POROUS MEDIUM UNDER ACTION OF POLLUTANT Russian patent published in 2015 - IPC G01V9/00 

FIELD: measurement equipment.

SUBSTANCE: emitter and receiver of acoustic waves are placed on opposite surfaces of a porous medium sample, first radiation is carried out over at least one part of the porous medium sample by acoustic waves, and speed of longitudinal acoustic waves propagation is measured, on the basis of porosity and nature of sample saturation they select empirical interconnection between speed of the longitudinal acoustic wave and porosity for this type of the porous medium, they perform a filtration experiment to pump pollutant solution via the porous medium sample, they perform the second radiation of the same part of the sample by acoustic waves and measure speed of propagation of longitudinal acoustic waves, and using selected empirical interconnection, they determine variation of porosity in this part of the porous medium sample, based on speeds of the longitudinal acoustic wave measured before and after pumping of the pollutant.

EFFECT: provision of possibility to determine variation of porous medium properties arising as a result of pollutant impact.

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