Failure mechanism of cavitation-induced shear of the plugging layer in high-temperature high-pressure fractured gas reservoirs in the Tazhong block, NW China
To profoundly understand the plugging layer failure behavior of high-temperature high-pressure fractured gas reservoirs in the Tazhong block, the failure characteristics of high-temperature high-pressure fractured gas reservoirs were studied and analyzed based on the combination of reservoir charact...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Bulletin of Geological Science and Technology
2022-07-01
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| Series: | 地质科技通报 |
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| Online Access: | https://dzkjqb.cug.edu.cn/en/article/doi/10.19509/j.cnki.dzkq.2021.0059 |
| _version_ | 1827329987005382656 |
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| author | Xiaoming Su Ruoning Wu Changju Zhao Qiren Wang Yuan Yuan Hanqiao Xiong |
| author_facet | Xiaoming Su Ruoning Wu Changju Zhao Qiren Wang Yuan Yuan Hanqiao Xiong |
| author_sort | Xiaoming Su |
| collection | DOAJ |
| description | To profoundly understand the plugging layer failure behavior of high-temperature high-pressure fractured gas reservoirs in the Tazhong block, the failure characteristics of high-temperature high-pressure fractured gas reservoirs were studied and analyzed based on the combination of reservoir characteristics, fluid properties and the microscaled physical structure of the plugging layer. The concept of cavitation-induced shear failure is proposed, and the physical model of cavitation-induced shear failure is established. The cavitation-induced shear failure process of the plugging layer is systematically studied with the aid of granular material mechanics and liquid bridge theory. In addition, laboratory experiments of reversed pressure-bearing were carried out based on the principle of reversed cavitation. Results show that the cavitation-induced shear failure of the fractured sealing layer is a special kind of failure modes of the plugging layerin gas reservoirs. This process can be divided into three steps: viscosity reduction because of gas diffusion, cavitation-induced shear stripping and fluids displacement mismatch shearing destructions. In addition, the experimental results show that the plugging layer with a positive pressure of 6 MPa has different shear failure resistances for different fluids. With the displacement medium changing from liquid to gas, the reversed pressure-bearing value of the plugging layer decreases from 2.0 MPa (22 min) and 2.5 MPa (30 min) to 1.5 MPa (10 min) and 1.0 MPa (12 min), respectively. The comprehensive shear resistance is reduced by approximately 50%, indicating that gas has different destructive ability and destructive mechanism compared to liquid. |
| first_indexed | 2024-03-07T15:49:10Z |
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| id | doaj.art-2aa561b256e445198bcae2203d10c2be |
| institution | Directory Open Access Journal |
| issn | 2096-8523 |
| language | zho |
| last_indexed | 2024-03-07T15:49:10Z |
| publishDate | 2022-07-01 |
| publisher | Editorial Department of Bulletin of Geological Science and Technology |
| record_format | Article |
| series | 地质科技通报 |
| spelling | doaj.art-2aa561b256e445198bcae2203d10c2be2024-03-05T03:00:12ZzhoEditorial Department of Bulletin of Geological Science and Technology地质科技通报2096-85232022-07-01414212910.19509/j.cnki.dzkq.2021.0059dzkjtb-41-4-21Failure mechanism of cavitation-induced shear of the plugging layer in high-temperature high-pressure fractured gas reservoirs in the Tazhong block, NW ChinaXiaoming Su0Ruoning Wu1Changju Zhao2Qiren Wang3Yuan Yuan4Hanqiao Xiong5Lanzhou City University, Lanzhou 730070, ChinaExploration and Development Technology Research Center, Yanchang Oil Field Co. Ltd., Yan'an Shaanxi 716000, ChinaEngineering and Technology Research Institute of SINOPEC Northwest Oil Field Branch, Urumqi 830011, ChinaSouthwest Branch, SINOPEC Shengli Petroleum Engineering Co. Ltd., Deyang Sichuan 618000, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chendu 610500, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chendu 610500, ChinaTo profoundly understand the plugging layer failure behavior of high-temperature high-pressure fractured gas reservoirs in the Tazhong block, the failure characteristics of high-temperature high-pressure fractured gas reservoirs were studied and analyzed based on the combination of reservoir characteristics, fluid properties and the microscaled physical structure of the plugging layer. The concept of cavitation-induced shear failure is proposed, and the physical model of cavitation-induced shear failure is established. The cavitation-induced shear failure process of the plugging layer is systematically studied with the aid of granular material mechanics and liquid bridge theory. In addition, laboratory experiments of reversed pressure-bearing were carried out based on the principle of reversed cavitation. Results show that the cavitation-induced shear failure of the fractured sealing layer is a special kind of failure modes of the plugging layerin gas reservoirs. This process can be divided into three steps: viscosity reduction because of gas diffusion, cavitation-induced shear stripping and fluids displacement mismatch shearing destructions. In addition, the experimental results show that the plugging layer with a positive pressure of 6 MPa has different shear failure resistances for different fluids. With the displacement medium changing from liquid to gas, the reversed pressure-bearing value of the plugging layer decreases from 2.0 MPa (22 min) and 2.5 MPa (30 min) to 1.5 MPa (10 min) and 1.0 MPa (12 min), respectively. The comprehensive shear resistance is reduced by approximately 50%, indicating that gas has different destructive ability and destructive mechanism compared to liquid.https://dzkjqb.cug.edu.cn/en/article/doi/10.19509/j.cnki.dzkq.2021.0059high-temperature high-pressurefractured gas reservoirplugging layer failurecavitation-induced shear failurereversed pressure-bearing |
| spellingShingle | Xiaoming Su Ruoning Wu Changju Zhao Qiren Wang Yuan Yuan Hanqiao Xiong Failure mechanism of cavitation-induced shear of the plugging layer in high-temperature high-pressure fractured gas reservoirs in the Tazhong block, NW China 地质科技通报 high-temperature high-pressure fractured gas reservoir plugging layer failure cavitation-induced shear failure reversed pressure-bearing |
| title | Failure mechanism of cavitation-induced shear of the plugging layer in high-temperature high-pressure fractured gas reservoirs in the Tazhong block, NW China |
| title_full | Failure mechanism of cavitation-induced shear of the plugging layer in high-temperature high-pressure fractured gas reservoirs in the Tazhong block, NW China |
| title_fullStr | Failure mechanism of cavitation-induced shear of the plugging layer in high-temperature high-pressure fractured gas reservoirs in the Tazhong block, NW China |
| title_full_unstemmed | Failure mechanism of cavitation-induced shear of the plugging layer in high-temperature high-pressure fractured gas reservoirs in the Tazhong block, NW China |
| title_short | Failure mechanism of cavitation-induced shear of the plugging layer in high-temperature high-pressure fractured gas reservoirs in the Tazhong block, NW China |
| title_sort | failure mechanism of cavitation induced shear of the plugging layer in high temperature high pressure fractured gas reservoirs in the tazhong block nw china |
| topic | high-temperature high-pressure fractured gas reservoir plugging layer failure cavitation-induced shear failure reversed pressure-bearing |
| url | https://dzkjqb.cug.edu.cn/en/article/doi/10.19509/j.cnki.dzkq.2021.0059 |
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