Applicability of velocity-stress relationships based on the dual porosity concept to isotropic porous rocks
Exponential increase of seismic velocities with effective stress has usually been explained by presence of pores with a broad distribution of aspect ratios. More recently, a stress-related closure of soft pores with a narrow distribution of compliances (e.g. grain contacts) has been suggested to be...
| Main Authors: | , , , |
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| Format: | Journal Article |
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Blackwell Publishing Ltd
2010
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| Online Access: | http://hdl.handle.net/20.500.11937/24721 |
| _version_ | 1848751508220280832 |
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| author | Pervukhina, M. Gurevich, Boris Dewhurst, D. Siggins, A. |
| author_facet | Pervukhina, M. Gurevich, Boris Dewhurst, D. Siggins, A. |
| author_sort | Pervukhina, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Exponential increase of seismic velocities with effective stress has usually been explained by presence of pores with a broad distribution of aspect ratios. More recently, a stress-related closure of soft pores with a narrow distribution of compliances (e.g. grain contacts) has been suggested to be sufficient to explain such exponential stress dependency. This theoretical interpretation has been verified here using laboratory measurements on dry sandstones. On the basis of these experimental data, linear dependency of elastic compressibility on soft porosity and exponential decay of soft porosity and elastic compressibility with effective stress up to 60 MPa is confirmed. Soft porosity, estimated from the fitting coefficients of elastic compressibilities, is on the same order of magnitude but slightly lower than obtained from strain measurements. The results confirm applicability of the previously proposed stress sensitivity model and provide justification for using this approach to model stress dependency of elastic properties. |
| first_indexed | 2025-11-14T07:53:50Z |
| format | Journal Article |
| id | curtin-20.500.11937-24721 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:53:50Z |
| publishDate | 2010 |
| publisher | Blackwell Publishing Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-247212017-09-13T15:55:52Z Applicability of velocity-stress relationships based on the dual porosity concept to isotropic porous rocks Pervukhina, M. Gurevich, Boris Dewhurst, D. Siggins, A. Geomechanics Elasticity and anelasticity Microstructure Exponential increase of seismic velocities with effective stress has usually been explained by presence of pores with a broad distribution of aspect ratios. More recently, a stress-related closure of soft pores with a narrow distribution of compliances (e.g. grain contacts) has been suggested to be sufficient to explain such exponential stress dependency. This theoretical interpretation has been verified here using laboratory measurements on dry sandstones. On the basis of these experimental data, linear dependency of elastic compressibility on soft porosity and exponential decay of soft porosity and elastic compressibility with effective stress up to 60 MPa is confirmed. Soft porosity, estimated from the fitting coefficients of elastic compressibilities, is on the same order of magnitude but slightly lower than obtained from strain measurements. The results confirm applicability of the previously proposed stress sensitivity model and provide justification for using this approach to model stress dependency of elastic properties. 2010 Journal Article http://hdl.handle.net/20.500.11937/24721 10.1111/j.1365-246X.2010.04535.x Blackwell Publishing Ltd unknown |
| spellingShingle | Geomechanics Elasticity and anelasticity Microstructure Pervukhina, M. Gurevich, Boris Dewhurst, D. Siggins, A. Applicability of velocity-stress relationships based on the dual porosity concept to isotropic porous rocks |
| title | Applicability of velocity-stress relationships based on the dual porosity concept to isotropic porous rocks |
| title_full | Applicability of velocity-stress relationships based on the dual porosity concept to isotropic porous rocks |
| title_fullStr | Applicability of velocity-stress relationships based on the dual porosity concept to isotropic porous rocks |
| title_full_unstemmed | Applicability of velocity-stress relationships based on the dual porosity concept to isotropic porous rocks |
| title_short | Applicability of velocity-stress relationships based on the dual porosity concept to isotropic porous rocks |
| title_sort | applicability of velocity-stress relationships based on the dual porosity concept to isotropic porous rocks |
| topic | Geomechanics Elasticity and anelasticity Microstructure |
| url | http://hdl.handle.net/20.500.11937/24721 |