Abstract

In this paper we have studied the influence of rock elastic properties, porosity and permeability on the reverberation of acoustic waves in a borehole drilled in a poroelastic formation. The modeling has shown that in the case of low permeability rocks the time of acoustical reverberation is determined by the seismic impedance of borehole wall (Vpρ), where Vp is the compressional wave velocity of the rock and ρ is the rock density. In the case of permeable rocks the time of borehole acoustic reverberation depends on their permeability. The results obtained demonstrate the feasibility of the considered sonic log modification to estimate the rock permeability.

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