Anomalous waveforms observed in laboratory-formed gas hydrate-bearing and ice-bearing sediments
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Abstract
Acoustic transmission measurements of compressional, P, and shear, S, wave velocities rely on correctly identifying the P- and S-body wave arrivals in the measured waveform. In cylindrical samples for which the sample is much longer than the acoustic wavelength, these body waves can be obscured by high-amplitude waveform features arriving just after the relatively small-amplitude P-body wave. In this study, a normal mode approach is used to analyze this type of waveform, observed in sediment containing gas hydrate or ice. This analysis extends an existing normal-mode waveform propagation theory by including the effects of the confining medium surrounding the sample, and provides guidelines for estimating S-wave velocities from waveforms containing multiple large-amplitude arrivals.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Anomalous waveforms observed in laboratory-formed gas hydrate-bearing and ice-bearing sediments |
| Series title | Journal of the Acoustical Society of America |
| DOI | 10.1121/1.3552877 |
| Volume | 129 |
| Issue | 4 |
| Year Published | 2011 |
| Language | English |
| Publisher | Acoustical Society of America |
| Description | 14 p. |
| First page | 1707 |
| Last page | 1720 |
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