Astronomy and Astrophysics – Astronomy
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009geoji.177..603m&link_type=abstract
Geophysical Journal International, Volume 177, Issue 2067, pp. 603-608.
Astronomy and Astrophysics
Astronomy
2
Permeability And Porosity, Interface Waves, Seismic Attenuation, Wave Propagation
Scientific paper
The Frenkel-Biot theory is used to study a propagation of Stoneley elastic wave at the boundary of two fluid-saturated porous media. The velocity and attenuation of the Stoneley surface wave are determined. I show that the dispersion equation coincides with the equation for the Stoneley wave at the interface of two elastic half-spaces in the low-frequency range. Numerical examples of calculations are presented for two important cases: two different fluids lying in the same viscoelastic skeleton (gas-water interface) and two poroelastic half-spaces with different porosity and permeability containing the same fluid. To take into account the absorption in the solid matrix, I use well-known Stoll's model. Our calculation results have shown that the Stoneley wave absorption is determined by the energy dissipation in the solid matrix for consolidated rocks. As the frequency is increased, hydrodynamic effects connected with the presence of a movable fluid in the pores begin to play a significant role.
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