Coupling effects of temperature, confining pressure, and pore pressure on permeability and average pore size of Longmaxi shale
Abstract The evolution due to temperature and pressure of shale reservoir permeability affects the productivity evaluation and development decision of shale gas reservoirs, which is very important for the exploration and development of unconventional gas reservoirs. This study analyzed the coupling...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2023-12-01
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| Series: | Deep Underground Science and Engineering |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/dug2.12047 |
| _version_ | 1797372434195677184 |
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| author | Xiaoyan Zhang Hongsen Li Xue Tan Guoliang Li Hua Jiang |
| author_facet | Xiaoyan Zhang Hongsen Li Xue Tan Guoliang Li Hua Jiang |
| author_sort | Xiaoyan Zhang |
| collection | DOAJ |
| description | Abstract The evolution due to temperature and pressure of shale reservoir permeability affects the productivity evaluation and development decision of shale gas reservoirs, which is very important for the exploration and development of unconventional gas reservoirs. This study analyzed the coupling effects of temperature (25, 50, and 75°C), effective stress (15 and 30 MPa), and pore pressure (0.5, 2.0, 4.0, and 8.0 MPa) on the permeability of the shale sample in the Longmaxi Formation. As the temperature and pressure increased, the apparent permeability exhibited a downward trend, and the absolute permeability decreased with the rise of temperature or effective stress. An in‐depth analysis of the gas slippage factors under the conditions of different temperature and pressure was conducted to evaluate the trend of the average pore width with temperature and pressure. The results were then verified by scanning electron microscopy (SEM). The results provide new insights into evaluating the permeability of the Longmaxi shale and can be used to enhance the gas recovery rate of deep shale gas reservoirs. |
| first_indexed | 2024-03-08T18:35:42Z |
| format | Article |
| id | doaj.art-6a2001ad2ca04350ad1e5d80c2653580 |
| institution | Directory Open Access Journal |
| issn | 2097-0668 2770-1328 |
| language | English |
| last_indexed | 2024-03-08T18:35:42Z |
| publishDate | 2023-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | Deep Underground Science and Engineering |
| spelling | doaj.art-6a2001ad2ca04350ad1e5d80c26535802023-12-29T11:56:13ZengWileyDeep Underground Science and Engineering2097-06682770-13282023-12-012435937010.1002/dug2.12047Coupling effects of temperature, confining pressure, and pore pressure on permeability and average pore size of Longmaxi shaleXiaoyan Zhang0Hongsen Li1Xue Tan2Guoliang Li3Hua Jiang4School of Mechanics and Civil Engineering China University of Mining and Technology Beijing ChinaSchool of Mechanics and Civil Engineering China University of Mining and Technology Beijing ChinaBGI Engineering Consultants Ltd Beijing ChinaKey Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics Chinese Academy of Sciences Beijing ChinaSchool of Mechanics and Civil Engineering China University of Mining and Technology Beijing ChinaAbstract The evolution due to temperature and pressure of shale reservoir permeability affects the productivity evaluation and development decision of shale gas reservoirs, which is very important for the exploration and development of unconventional gas reservoirs. This study analyzed the coupling effects of temperature (25, 50, and 75°C), effective stress (15 and 30 MPa), and pore pressure (0.5, 2.0, 4.0, and 8.0 MPa) on the permeability of the shale sample in the Longmaxi Formation. As the temperature and pressure increased, the apparent permeability exhibited a downward trend, and the absolute permeability decreased with the rise of temperature or effective stress. An in‐depth analysis of the gas slippage factors under the conditions of different temperature and pressure was conducted to evaluate the trend of the average pore width with temperature and pressure. The results were then verified by scanning electron microscopy (SEM). The results provide new insights into evaluating the permeability of the Longmaxi shale and can be used to enhance the gas recovery rate of deep shale gas reservoirs.https://doi.org/10.1002/dug2.12047absolute permeabilityapparent permeabilitygas slippage factorspore widthshale |
| spellingShingle | Xiaoyan Zhang Hongsen Li Xue Tan Guoliang Li Hua Jiang Coupling effects of temperature, confining pressure, and pore pressure on permeability and average pore size of Longmaxi shale Deep Underground Science and Engineering absolute permeability apparent permeability gas slippage factors pore width shale |
| title | Coupling effects of temperature, confining pressure, and pore pressure on permeability and average pore size of Longmaxi shale |
| title_full | Coupling effects of temperature, confining pressure, and pore pressure on permeability and average pore size of Longmaxi shale |
| title_fullStr | Coupling effects of temperature, confining pressure, and pore pressure on permeability and average pore size of Longmaxi shale |
| title_full_unstemmed | Coupling effects of temperature, confining pressure, and pore pressure on permeability and average pore size of Longmaxi shale |
| title_short | Coupling effects of temperature, confining pressure, and pore pressure on permeability and average pore size of Longmaxi shale |
| title_sort | coupling effects of temperature confining pressure and pore pressure on permeability and average pore size of longmaxi shale |
| topic | absolute permeability apparent permeability gas slippage factors pore width shale |
| url | https://doi.org/10.1002/dug2.12047 |
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