Explicit use of the Biot coefficient in predicting shear-wave velocity of water-saturated sediments

Geophysical Prospecting
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Abstract

Predicting the shear-wave (S-wave) velocity is important in seismic modelling, amplitude analysis with offset, and other exploration and engineering applications. Under the low-frequency approximation, the classical Biot-Gassmann theory relates the Biot coefficient to the bulk modulus of water-saturated sediments. If the Biot coefficient under in situ conditions can be estimated, the shear modulus or the S-wave velocity can be calculated. The Biot coefficient derived from the compressional-wave (P-wave) velocity of water-saturated sediments often differs from and is less than that estimated from the S-wave velocity, owing to the interactions between the pore fluid and the grain contacts. By correcting the Biot coefficients derived from P-wave velocities of water-saturated sediments measured at various differential pressures, an accurate method of predicting S-wave velocities is proposed. Numerical results indicate that the predicted S-wave velocities for consolidated and unconsolidated sediments agreewell with measured velocities. ?? 2006 European Association of Geoscientists & Engineers.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Explicit use of the Biot coefficient in predicting shear-wave velocity of water-saturated sediments
Series title Geophysical Prospecting
DOI 10.1111/j.1365-2478.2006.00524.x
Volume 54
Issue 2
Year Published 2006
Language English
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Geophysical Prospecting
First page 177
Last page 185
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