Linking the pressure dependency of elastic and electrical properties of porous rocks by a dual porosity model
Knowledge about the pressure dependency of elastic and electrical properties is important for a variety of geophysical applications. We present a technique to invert for the stiff and compliant porosity from velocity measurements made as a function of differential pressure on saturated sandstones. A...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
Blackwell Publishing Ltd
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/32809 |
| _version_ | 1848753766707232768 |
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| author | Han, T. Gurevich, Boris Pervukhina, M. Clennell, M. Zhang, J. |
| author_facet | Han, T. Gurevich, Boris Pervukhina, M. Clennell, M. Zhang, J. |
| author_sort | Han, T. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Knowledge about the pressure dependency of elastic and electrical properties is important for a variety of geophysical applications. We present a technique to invert for the stiff and compliant porosity from velocity measurements made as a function of differential pressure on saturated sandstones. A dual porosity concept is used for dry rock compressibility and a squirt model is employed for the pressure and frequency dependent elastic properties of the rocks when saturated. The total porosity obtained from inversion shows satisfactory agreement with experimental results. The electrical cementation factor was determined using the inverted porosity in combination with measured electrical conductivity. It was found that cementation factor increased exponentially with increasing differential pressure during isostatic loading. Elastic compressibility, electrical cementation factor and electrical conductivity of the saturated rocks correlate linearly with compliant porosity, and electrical cementation factor and electrical conductivity exhibit linear correlations with elastic compressibility of the saturated rocks under loading. The results show that the dual porosity concept is sufficient to explain the pressure dependency of elastic, electrical and joint elastic-electrical properties of saturated porous sandstones. |
| first_indexed | 2025-11-14T08:29:44Z |
| format | Journal Article |
| id | curtin-20.500.11937-32809 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:29:44Z |
| publishDate | 2016 |
| publisher | Blackwell Publishing Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-328092017-09-13T15:27:12Z Linking the pressure dependency of elastic and electrical properties of porous rocks by a dual porosity model Han, T. Gurevich, Boris Pervukhina, M. Clennell, M. Zhang, J. Knowledge about the pressure dependency of elastic and electrical properties is important for a variety of geophysical applications. We present a technique to invert for the stiff and compliant porosity from velocity measurements made as a function of differential pressure on saturated sandstones. A dual porosity concept is used for dry rock compressibility and a squirt model is employed for the pressure and frequency dependent elastic properties of the rocks when saturated. The total porosity obtained from inversion shows satisfactory agreement with experimental results. The electrical cementation factor was determined using the inverted porosity in combination with measured electrical conductivity. It was found that cementation factor increased exponentially with increasing differential pressure during isostatic loading. Elastic compressibility, electrical cementation factor and electrical conductivity of the saturated rocks correlate linearly with compliant porosity, and electrical cementation factor and electrical conductivity exhibit linear correlations with elastic compressibility of the saturated rocks under loading. The results show that the dual porosity concept is sufficient to explain the pressure dependency of elastic, electrical and joint elastic-electrical properties of saturated porous sandstones. 2016 Journal Article http://hdl.handle.net/20.500.11937/32809 10.1093/gji/ggw019 Blackwell Publishing Ltd unknown |
| spellingShingle | Han, T. Gurevich, Boris Pervukhina, M. Clennell, M. Zhang, J. Linking the pressure dependency of elastic and electrical properties of porous rocks by a dual porosity model |
| title | Linking the pressure dependency of elastic and electrical properties of porous rocks by a dual porosity model |
| title_full | Linking the pressure dependency of elastic and electrical properties of porous rocks by a dual porosity model |
| title_fullStr | Linking the pressure dependency of elastic and electrical properties of porous rocks by a dual porosity model |
| title_full_unstemmed | Linking the pressure dependency of elastic and electrical properties of porous rocks by a dual porosity model |
| title_short | Linking the pressure dependency of elastic and electrical properties of porous rocks by a dual porosity model |
| title_sort | linking the pressure dependency of elastic and electrical properties of porous rocks by a dual porosity model |
| url | http://hdl.handle.net/20.500.11937/32809 |