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Book Chapter

Seismic Waves—Numerical Investigations

Published:
January 01, 2000

Abstract

Numerical studies can point the way for experiments and indicate the sort of data that analysts of field data should be expecting. One explanation for anisotropy in sedimentary sections arises directly out of the effects of layering on long wavelength seismic signals. This theory can be extended to predict the shapes of transmitted wavefronts in transversely isotropic media, as was shown in the 1982 paper, ‘Computed waveforms in transversely isotropic media.’ Attenuation again receives special attention in ‘Computing seismic speeds and attenuation in rocks with partial gas saturation’ (1975), which notes that shear-wave amplitudes are less affected by partial gas saturation than are P-waves. This observation has been the driving force in the popularity of 4-C offshore surveys to see beneath gas cloud ‘wipe-out’ zones on regular P-wave seismic sections by exploiting the ability of mode-converted waves (P-down, S-up) to propagate successfully through zones that would severely attenuate P-waves.

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Contents

Society of Exploration Geophysicists Geophysics Reprint Series

Seismic Wave Propagation: Collected Works of J. E. White

J. E. White
J. E. White
Professor Emeritus, Colorado School of Mines
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Society of Exploration Geophysicists
Volume
21
ISBN electronic:
9781560802471
Publication date:
January 01, 2000

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