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SEISMIC WAVE PROPAQATION IN TRANSVERSELY ISOTROPIC POROUS MEDIA

LIU YIN-BIN;LI YOU-MING;WU RU-SHAN(Institute of Geophysics,Academia Sinica,Beijing 100101)  
Rased onthe generallzed Biot's theory in antisotroplc porous media the charac teristic equations of the seimic wave propagation in transversely isotropic porous media were derived.It is shown that in the porous media there are four kinds of dlspersive and attenuative waves (two quasi-longitudinal waves, one quasi-shear wave, and one pure shear wave).In this essay, the analytical velocity formulas for four kinds of waves were derived.The numerical calculated curves of dispersion and attenuation is similar to the result which Schmitt (1989) gave by homogenlzation theories. The coupling coefficients (or transform coefficients) among the kinds of seismic wave propagation are alsopresented.
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