Measuring Ultrasonic Characterisation to Determine the Impact of Toc and the Stress Field on Shale Gas Anisotropy
While the majority of natural gas is produced from conventional sources, there is significant growth from unconventional sources, including shale-gas reservoirs. To produce gas economically, candidate shale typically requires a range of characteristics, including a relatively high total organic carb...
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| Format: | Journal Article |
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Australian Petroleum Production and Exploration Association
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/17993 |
| _version_ | 1848749617669210112 |
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| author | Altowairqi, Y. Rezaee, M. Reza Urosevic, Milovan Delle Piane, C. |
| author_facet | Altowairqi, Y. Rezaee, M. Reza Urosevic, Milovan Delle Piane, C. |
| author_sort | Altowairqi, Y. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | While the majority of natural gas is produced from conventional sources, there is significant growth from unconventional sources, including shale-gas reservoirs. To produce gas economically, candidate shale typically requires a range of characteristics, including a relatively high total organic carbon (TOC) content, and it must be gas mature. Mechanical and dynamic elastic properties are also important shale characteristics that are not well understood as there have been a limited number of investigations of well-preserved samples. In this study, the elastic properties of shale samples are determined by measuring wave velocities. Arrays of ultrasonic transducers are used to measure five independent wave velocities, which are used to calculate the elastic properties of the shale. The results indicated that for the shale examined in this research, P- and S-wave velocities vary depending on the isotropic stress conditions with respect to the fabric and TOC content. It was shown that the isotropic stress significantly impacts velocity. In addition, S-wave anisotropy was significantly affected by increasing stress anisotropy. Stress orientation, with respect to fabric orientation, was found to be an important influence on the degree of anisotropy of the dynamic elastic properties in the shale. Furthermore, the relationship between acoustic impedance (AI) and TOC was established for all the samples. |
| first_indexed | 2025-11-14T07:23:47Z |
| format | Journal Article |
| id | curtin-20.500.11937-17993 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:23:47Z |
| publishDate | 2013 |
| publisher | Australian Petroleum Production and Exploration Association |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-179932017-05-30T08:04:36Z Measuring Ultrasonic Characterisation to Determine the Impact of Toc and the Stress Field on Shale Gas Anisotropy Altowairqi, Y. Rezaee, M. Reza Urosevic, Milovan Delle Piane, C. stress conditions total organic content (TOC) ultrasonic waves lithology acoustic impedance (AI) Shale anisotropy While the majority of natural gas is produced from conventional sources, there is significant growth from unconventional sources, including shale-gas reservoirs. To produce gas economically, candidate shale typically requires a range of characteristics, including a relatively high total organic carbon (TOC) content, and it must be gas mature. Mechanical and dynamic elastic properties are also important shale characteristics that are not well understood as there have been a limited number of investigations of well-preserved samples. In this study, the elastic properties of shale samples are determined by measuring wave velocities. Arrays of ultrasonic transducers are used to measure five independent wave velocities, which are used to calculate the elastic properties of the shale. The results indicated that for the shale examined in this research, P- and S-wave velocities vary depending on the isotropic stress conditions with respect to the fabric and TOC content. It was shown that the isotropic stress significantly impacts velocity. In addition, S-wave anisotropy was significantly affected by increasing stress anisotropy. Stress orientation, with respect to fabric orientation, was found to be an important influence on the degree of anisotropy of the dynamic elastic properties in the shale. Furthermore, the relationship between acoustic impedance (AI) and TOC was established for all the samples. 2013 Journal Article http://hdl.handle.net/20.500.11937/17993 Australian Petroleum Production and Exploration Association fulltext |
| spellingShingle | stress conditions total organic content (TOC) ultrasonic waves lithology acoustic impedance (AI) Shale anisotropy Altowairqi, Y. Rezaee, M. Reza Urosevic, Milovan Delle Piane, C. Measuring Ultrasonic Characterisation to Determine the Impact of Toc and the Stress Field on Shale Gas Anisotropy |
| title | Measuring Ultrasonic Characterisation to Determine the Impact of Toc and the Stress Field on Shale Gas Anisotropy |
| title_full | Measuring Ultrasonic Characterisation to Determine the Impact of Toc and the Stress Field on Shale Gas Anisotropy |
| title_fullStr | Measuring Ultrasonic Characterisation to Determine the Impact of Toc and the Stress Field on Shale Gas Anisotropy |
| title_full_unstemmed | Measuring Ultrasonic Characterisation to Determine the Impact of Toc and the Stress Field on Shale Gas Anisotropy |
| title_short | Measuring Ultrasonic Characterisation to Determine the Impact of Toc and the Stress Field on Shale Gas Anisotropy |
| title_sort | measuring ultrasonic characterisation to determine the impact of toc and the stress field on shale gas anisotropy |
| topic | stress conditions total organic content (TOC) ultrasonic waves lithology acoustic impedance (AI) Shale anisotropy |
| url | http://hdl.handle.net/20.500.11937/17993 |