Explicit use of the Biot coefficient in predicting shear-wave velocity of water-saturated sediments
Geophysical Prospecting
By: M. W. Lee
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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.
| 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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