Abstract
The influence of the elastic and hydrodynamic properties of a rock on the time attenuation coef� ficient of an acoustic wave, which is reflected from the borehole wall, is considered using the methods of the mechanics of saturated porous media. The calculations were performed for a system consisting of an acoustic logging tool of a finite with a finite diameter, a fluidfilled borehole, and a porous permeable rock. The per� formed simulation showed that in rocks with a low hydrodynamic permeability, the acousticreverberation time is determined by the acoustic impedance of the borehole wall (product of the rock density and the lon� gitudinalwave velocity in it). In the case of rocks wi th a permeability of about several hundred millidarcy, the time signal's attenuation coefficient substantially depends on the rock's permeability.
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