Velocity of sound as a function of bubble distribution in gas‐bearing sediments | Zendy

Kepkay P. E. | Zendy; Cooke R. C. | Zendy

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Velocity of sound as a function of bubble distribution in gas‐bearing sediments

Author(s) -

Kepkay P. E.,

Cooke R. C.

Publication year - 1978

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/gl005i012p01071

Subject(s) - bubble , volume (thermodynamics) , volume fraction , geology , porosity , sediment , gas bubble , sound (geography) , mechanics , bearing (navigation) , mineralogy , thermodynamics , geotechnical engineering , physics , geomorphology , astronomy

The velocity of sound in a water‐saturated sediment is controlled by the distribution of interstitial microbubbles (no greater than 60 µm in diameter) rather than simply by total gas volume. A continuously increasing gas volume fraction in the sediment is accompanied by a discontinuous decrease of compressional wave velocity, and the overall velocity reduction is only 11% at a gas volume fraction of 0.18. Neither of these observations agrees with the predictions of either emulsion theory or theory for a fluid‐saturated porous solid when modified to describe gas‐bearing sediments.

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