Investigation on Hydration and Deformation Characteristics of Shale Using X-ray Computed Tomography
The physical and mechanical properties of shale are significant for completion engineering and fracturing design for shale oil and gas production. To further study the water effect and the deformation characteristics of shale, some cylindrical specimens were soaked at three periods (0, 20, and 60 da...
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| Format: | Article |
| Language: | English |
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Wiley
2022-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2022/4370907 |
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| author | Yong-Ting Duan Xiao Li Bo Zheng Bai-Cun Yang |
| author_facet | Yong-Ting Duan Xiao Li Bo Zheng Bai-Cun Yang |
| author_sort | Yong-Ting Duan |
| collection | DOAJ |
| description | The physical and mechanical properties of shale are significant for completion engineering and fracturing design for shale oil and gas production. To further study the water effect and the deformation characteristics of shale, some cylindrical specimens were soaked at three periods (0, 20, and 60 days), the in situ uniaxial compression tests were conducted, and the CT technique was used at different hydration and loading stages. Based on the CT results, the image gray variance value in each hydration specimen was extracted; the evolution results show that the water imbibition has a significant influence on the structure of shale in the early soaking stage, and the influence degree is more evident in the external region. Moreover, the water influence on the mechanical property of shale was analyzed by comparing the failure characteristics of specimens with and without hydration; the CT results show that the hydration treatment affects the failure mode of shale. In addition, a new method based on the CT image was proposed to calculate the lateral strain; the evolution of the axial stress-strain curve reveals that the expansion phenomena exist before failure, and the evolution process includes four stages. At last, the differences in the deformation degree were discussed by analyzing the volumetric strain at different CT scanning layers; the results reflect the expansion or compression degree along with the specimen height. Those conclusions can help us further understand the water effect and the deformation characteristics of shale oil and gas reservoirs. |
| format | Article |
| id | doaj-art-bd53c09b86934709a861debe7f81938f |
| institution | Kabale University |
| issn | 1468-8123 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-bd53c09b86934709a861debe7f81938f2025-02-03T05:53:40ZengWileyGeofluids1468-81232022-01-01202210.1155/2022/4370907Investigation on Hydration and Deformation Characteristics of Shale Using X-ray Computed TomographyYong-Ting Duan0Xiao Li1Bo Zheng2Bai-Cun Yang3Key Laboratory of Ministry of Education on Safe Mining of Deep Metal MinesKey Laboratory of Shale Gas and GeoengineeringKey Laboratory of Shale Gas and GeoengineeringSchool of Resources and Civil EngineeringThe physical and mechanical properties of shale are significant for completion engineering and fracturing design for shale oil and gas production. To further study the water effect and the deformation characteristics of shale, some cylindrical specimens were soaked at three periods (0, 20, and 60 days), the in situ uniaxial compression tests were conducted, and the CT technique was used at different hydration and loading stages. Based on the CT results, the image gray variance value in each hydration specimen was extracted; the evolution results show that the water imbibition has a significant influence on the structure of shale in the early soaking stage, and the influence degree is more evident in the external region. Moreover, the water influence on the mechanical property of shale was analyzed by comparing the failure characteristics of specimens with and without hydration; the CT results show that the hydration treatment affects the failure mode of shale. In addition, a new method based on the CT image was proposed to calculate the lateral strain; the evolution of the axial stress-strain curve reveals that the expansion phenomena exist before failure, and the evolution process includes four stages. At last, the differences in the deformation degree were discussed by analyzing the volumetric strain at different CT scanning layers; the results reflect the expansion or compression degree along with the specimen height. Those conclusions can help us further understand the water effect and the deformation characteristics of shale oil and gas reservoirs.http://dx.doi.org/10.1155/2022/4370907 |
| spellingShingle | Yong-Ting Duan Xiao Li Bo Zheng Bai-Cun Yang Investigation on Hydration and Deformation Characteristics of Shale Using X-ray Computed Tomography Geofluids |
| title | Investigation on Hydration and Deformation Characteristics of Shale Using X-ray Computed Tomography |
| title_full | Investigation on Hydration and Deformation Characteristics of Shale Using X-ray Computed Tomography |
| title_fullStr | Investigation on Hydration and Deformation Characteristics of Shale Using X-ray Computed Tomography |
| title_full_unstemmed | Investigation on Hydration and Deformation Characteristics of Shale Using X-ray Computed Tomography |
| title_short | Investigation on Hydration and Deformation Characteristics of Shale Using X-ray Computed Tomography |
| title_sort | investigation on hydration and deformation characteristics of shale using x ray computed tomography |
| url | http://dx.doi.org/10.1155/2022/4370907 |
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