On the theory of acoustical emission accompanying gas filtration by partially fluid-saturated medium

The physical mechanism of acoustical emission accompanying gas filtration through a partially fluid-saturated porous medium (when capillary walls are wetted by liquid) is proposed. Spectrum characteristics of radiated elastic compression waves are calculated and the obtained results are plotted. The calculation data enable one to predict the percentage of the captured fluid mass in a real porous medium. Acoustical emission signals caused by gas filtration in a reservoir should be recorded by geophones located in bore holes and their spectra should be analyzed.