Ultrasonic moduli for fluid-saturated rocks: Mavko-Jizba relations rederived and generalized
Mavko and Jizba propose a quantitative model for squirt dispersion of elastic-wave velocities between seismic and ultrasonic frequencies in granular rocks. Their central results are the expressions for the so-called unrelaxed frame bulk and shear moduli computed under an assumption that the stiff po...
| Main Authors: | , , |
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| Format: | Journal Article |
| Published: |
Society of Exploration Geophysics
2009
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| Online Access: | http://hdl.handle.net/20.500.11937/38956 |
| _version_ | 1848755459647864832 |
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| author | Gurevich, Boris Makarynska, D Pervukhina, M. |
| author_facet | Gurevich, Boris Makarynska, D Pervukhina, M. |
| author_sort | Gurevich, Boris |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Mavko and Jizba propose a quantitative model for squirt dispersion of elastic-wave velocities between seismic and ultrasonic frequencies in granular rocks. Their central results are the expressions for the so-called unrelaxed frame bulk and shear moduli computed under an assumption that the stiff pores are drained (or dry) but the soft pores are filled with fluid. Mavko-Jizba expressions are limited to liquid-saturated rocks but become inaccurate when the fluid-bulk modulus is small (e.g., for gas-saturated rocks). We have derived new expressions for unrelaxed moduli of fluid-saturated porous rocks using Sayers-Kachanov discontinuity formalism. The derived expressions generalize the established Mavko-Jizba relations to gas-saturated rocks, reduce to Mavko-Jizba results when the pore fluid is liquid, and yield dry moduli when fluid-bulk modulus tends to zero. We tested this by comparing our model and the model of Mavko and Jizba against laboratory measurements on a sample of Westerly granite. |
| first_indexed | 2025-11-14T08:56:39Z |
| format | Journal Article |
| id | curtin-20.500.11937-38956 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:56:39Z |
| publishDate | 2009 |
| publisher | Society of Exploration Geophysics |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-389562017-09-13T15:59:56Z Ultrasonic moduli for fluid-saturated rocks: Mavko-Jizba relations rederived and generalized Gurevich, Boris Makarynska, D Pervukhina, M. Mavko and Jizba propose a quantitative model for squirt dispersion of elastic-wave velocities between seismic and ultrasonic frequencies in granular rocks. Their central results are the expressions for the so-called unrelaxed frame bulk and shear moduli computed under an assumption that the stiff pores are drained (or dry) but the soft pores are filled with fluid. Mavko-Jizba expressions are limited to liquid-saturated rocks but become inaccurate when the fluid-bulk modulus is small (e.g., for gas-saturated rocks). We have derived new expressions for unrelaxed moduli of fluid-saturated porous rocks using Sayers-Kachanov discontinuity formalism. The derived expressions generalize the established Mavko-Jizba relations to gas-saturated rocks, reduce to Mavko-Jizba results when the pore fluid is liquid, and yield dry moduli when fluid-bulk modulus tends to zero. We tested this by comparing our model and the model of Mavko and Jizba against laboratory measurements on a sample of Westerly granite. 2009 Journal Article http://hdl.handle.net/20.500.11937/38956 10.1190/1.3123802 Society of Exploration Geophysics fulltext |
| spellingShingle | Gurevich, Boris Makarynska, D Pervukhina, M. Ultrasonic moduli for fluid-saturated rocks: Mavko-Jizba relations rederived and generalized |
| title | Ultrasonic moduli for fluid-saturated rocks: Mavko-Jizba relations rederived and generalized |
| title_full | Ultrasonic moduli for fluid-saturated rocks: Mavko-Jizba relations rederived and generalized |
| title_fullStr | Ultrasonic moduli for fluid-saturated rocks: Mavko-Jizba relations rederived and generalized |
| title_full_unstemmed | Ultrasonic moduli for fluid-saturated rocks: Mavko-Jizba relations rederived and generalized |
| title_short | Ultrasonic moduli for fluid-saturated rocks: Mavko-Jizba relations rederived and generalized |
| title_sort | ultrasonic moduli for fluid-saturated rocks: mavko-jizba relations rederived and generalized |
| url | http://hdl.handle.net/20.500.11937/38956 |