Triaxial Deformation of the Goldwyer Gas Shale at In Situ Stress Conditions—Part I: Anisotropy of Elastic and Mechanical Properties
The evolution of shale’s mechanical properties with confining pressure, temperature, and mineral composition directly influences fracture closure besides the effect of in situ stress variation across lithologies. We are the first to perform experimental study to characterize the mechanical propertie...
| Main Authors: | , , |
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| Format: | Journal Article |
| Language: | English |
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Springer Nature
2022
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| Online Access: | http://hdl.handle.net/20.500.11937/89527 |
| _version_ | 1848765236280033280 |
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| author | Manda, Partha Sarout, Joel Rezaee, Reza |
| author_facet | Manda, Partha Sarout, Joel Rezaee, Reza |
| author_sort | Manda, Partha |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The evolution of shale’s mechanical properties with confining pressure, temperature, and mineral composition directly influences fracture closure besides the effect of in situ stress variation across lithologies. We are the first to perform experimental study to characterize the mechanical properties of the Goldwyer gas shale formation located in the Canning Basin, Western Australia. We have performed constant strain rate multistage triaxial tests at in situ stress condition (confining pressure ≤ 22 MPa) on 15 samples of the Goldwyer gas shales with variable minerology, organic content, and heterogeneity. Deformation tests were conducted at room temperature and in drained conditions on cylindrical samples cored parallel (horizontal) and perpendicular (vertical) to the bedding plane. Both triaxial compressive strength (σTCS) and static young’s modulus E show a strong sensitivity to confining pressure and mineralogy, while only E shows a directional dependency, i.e., Eh > Ev. The internal friction coefficient µi in a plane parallel to the bedding is 0.72 ± 0.12, while it is only 0.58 ± 0.17 in the orthogonal direction. Both σTCS and E are significantly lower when larger fractions of weak mineral constituents are present (clays or organic matter). We observe that the Young’s modulus of most vertical samples is best approximated by Reuss’s bound, whereas that of horizontal samples is best approximated by Hill’s average of Voigt and Reuss bounds. The most prospective G-III unit of the Goldwyer shale formation (depth > 1510 m) is semi-brittle to brittle, making it suitable for future development. |
| first_indexed | 2025-11-14T11:32:02Z |
| format | Journal Article |
| id | curtin-20.500.11937-89527 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:32:02Z |
| publishDate | 2022 |
| publisher | Springer Nature |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-895272023-01-18T07:09:24Z Triaxial Deformation of the Goldwyer Gas Shale at In Situ Stress Conditions—Part I: Anisotropy of Elastic and Mechanical Properties Manda, Partha Sarout, Joel Rezaee, Reza Science & Technology Technology Physical Sciences Engineering, Geological Geosciences, Multidisciplinary Engineering Geology Triaxial deformation Young's modulus Compressive strength Anisotropy Brittleness Goldwyer gas shale WAVE VELOCITIES STRENGTH ROCKS RESERVOIR CREEP CLAY BRITTLENESS PRESSURE BEHAVIOR SYSTEMS The evolution of shale’s mechanical properties with confining pressure, temperature, and mineral composition directly influences fracture closure besides the effect of in situ stress variation across lithologies. We are the first to perform experimental study to characterize the mechanical properties of the Goldwyer gas shale formation located in the Canning Basin, Western Australia. We have performed constant strain rate multistage triaxial tests at in situ stress condition (confining pressure ≤ 22 MPa) on 15 samples of the Goldwyer gas shales with variable minerology, organic content, and heterogeneity. Deformation tests were conducted at room temperature and in drained conditions on cylindrical samples cored parallel (horizontal) and perpendicular (vertical) to the bedding plane. Both triaxial compressive strength (σTCS) and static young’s modulus E show a strong sensitivity to confining pressure and mineralogy, while only E shows a directional dependency, i.e., Eh > Ev. The internal friction coefficient µi in a plane parallel to the bedding is 0.72 ± 0.12, while it is only 0.58 ± 0.17 in the orthogonal direction. Both σTCS and E are significantly lower when larger fractions of weak mineral constituents are present (clays or organic matter). We observe that the Young’s modulus of most vertical samples is best approximated by Reuss’s bound, whereas that of horizontal samples is best approximated by Hill’s average of Voigt and Reuss bounds. The most prospective G-III unit of the Goldwyer shale formation (depth > 1510 m) is semi-brittle to brittle, making it suitable for future development. 2022 Journal Article http://hdl.handle.net/20.500.11937/89527 10.1007/s00603-022-02936-2 English http://creativecommons.org/licenses/by/4.0/ Springer Nature fulltext |
| spellingShingle | Science & Technology Technology Physical Sciences Engineering, Geological Geosciences, Multidisciplinary Engineering Geology Triaxial deformation Young's modulus Compressive strength Anisotropy Brittleness Goldwyer gas shale WAVE VELOCITIES STRENGTH ROCKS RESERVOIR CREEP CLAY BRITTLENESS PRESSURE BEHAVIOR SYSTEMS Manda, Partha Sarout, Joel Rezaee, Reza Triaxial Deformation of the Goldwyer Gas Shale at In Situ Stress Conditions—Part I: Anisotropy of Elastic and Mechanical Properties |
| title | Triaxial Deformation of the Goldwyer Gas Shale at In Situ Stress Conditions—Part I: Anisotropy of Elastic and Mechanical Properties |
| title_full | Triaxial Deformation of the Goldwyer Gas Shale at In Situ Stress Conditions—Part I: Anisotropy of Elastic and Mechanical Properties |
| title_fullStr | Triaxial Deformation of the Goldwyer Gas Shale at In Situ Stress Conditions—Part I: Anisotropy of Elastic and Mechanical Properties |
| title_full_unstemmed | Triaxial Deformation of the Goldwyer Gas Shale at In Situ Stress Conditions—Part I: Anisotropy of Elastic and Mechanical Properties |
| title_short | Triaxial Deformation of the Goldwyer Gas Shale at In Situ Stress Conditions—Part I: Anisotropy of Elastic and Mechanical Properties |
| title_sort | triaxial deformation of the goldwyer gas shale at in situ stress conditions—part i: anisotropy of elastic and mechanical properties |
| topic | Science & Technology Technology Physical Sciences Engineering, Geological Geosciences, Multidisciplinary Engineering Geology Triaxial deformation Young's modulus Compressive strength Anisotropy Brittleness Goldwyer gas shale WAVE VELOCITIES STRENGTH ROCKS RESERVOIR CREEP CLAY BRITTLENESS PRESSURE BEHAVIOR SYSTEMS |
| url | http://hdl.handle.net/20.500.11937/89527 |