Seismogram synthesis for radially layered media using the generalized reflection/transmission coefficients method: Theory and applications to acoustic logging
- Univ. of Southern California, Los Angeles, CA (United States). Dept. of Earth Sciences
- Stanford Univ., CA (United States). Dept. of Geophysics
A new method based on generalized reflection and transmission coefficients is proposed to calculate the synthetic seismograms in radially multilayered media. This method can be used to efficiently simulate full waveform acoustic logs and crosswell seismic profiles in situations where one needs to consider borehole effects. The new formulation is tested by comparing the authors` numerical results with previous available work and shows excellent agreement. Because of the use of the normalized Hankel functions and the normalization factors, this new algorithm for computing seismograms is stable numerically even for high-frequency problems. To show the applicability of this new approach to full waveform sonic logging, they apply it to investigate the effects of complex invaded zones on the geometrical spreading and attenuation estimation for P-waves. They find that a damaged zone (its velocity is slower than the unperturbed formation velocity) exhibits a convergence effect on the P-waves, and a flushed zone (velocity is faster than the unperturbed formation velocity) exhibits a divergence effect on the P-waves.
- OSTI ID:
- 277615
- Journal Information:
- Geophysics, Vol. 61, Issue 4; Other Information: PBD: Jul-Aug 1996
- Country of Publication:
- United States
- Language:
- English
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