Research on the Stability and Treatments of Natural Gas Storage Caverns With Different Shapes in Bedded Salt Rocks
Because of complex geo-conditions, many caverns by solution mining in bedded salt rocks have different irregular shapes. To verify the feasibility of using irregular-shaped caverns for underground gas storage (UGS), four typical cavern-shapes are selected, and the stability of each type is evaluated...
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| Format: | Article |
| Language: | English |
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IEEE
2020-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/8962071/ |
| _version_ | 1818732864989036544 |
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| author | Wei Liu Zhixin Zhang Jinyang Fan Deyi Jiang Jaak J. K. Daemen |
| author_facet | Wei Liu Zhixin Zhang Jinyang Fan Deyi Jiang Jaak J. K. Daemen |
| author_sort | Wei Liu |
| collection | DOAJ |
| description | Because of complex geo-conditions, many caverns by solution mining in bedded salt rocks have different irregular shapes. To verify the feasibility of using irregular-shaped caverns for underground gas storage (UGS), four typical cavern-shapes are selected, and the stability of each type is evaluated and compared by using the numerical simulation methods. The simulation results show that the UGS salt cavern with irregular wall shape has the lowest volume shrinkage and displacement of the wall rock, but larger plastic zones appear in their overhanging and concave parts. Ellipsoid-shape cavern has the best stability. Cylinder-shape cavern and cuboid-shape cavern have the poorest stability. In these two types of caverns, large deformations occur in the roof and sidewall, which pose a great potential of inducing collapse in the wall rock. By comparison of the stability characteristics in different positions of the wall rock, we found that the roof shape has a much greater influence than the sidewall on the stability of a cavern. The roof must be designed as an arch to improve cavern stability. Treatments to improve the stability of irregularly shaped caverns by changing operational pressure and utilization way or by modifying the caverns' shape are also discussed. So, this study not only determined the stability state of different shaped caverns for gas storage in bedded salt rocks, but also provides the ways to modify the irregular-shaped caverns for storage applications. |
| first_indexed | 2024-12-17T23:40:21Z |
| format | Article |
| id | doaj.art-6ff279c846164f128ccd00d4e3101e63 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-17T23:40:21Z |
| publishDate | 2020-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-6ff279c846164f128ccd00d4e3101e632022-12-21T21:28:27ZengIEEEIEEE Access2169-35362020-01-018189951900710.1109/ACCESS.2020.29670788962071Research on the Stability and Treatments of Natural Gas Storage Caverns With Different Shapes in Bedded Salt RocksWei Liu0https://orcid.org/0000-0003-0475-1023Zhixin Zhang1Jinyang Fan2Deyi Jiang3Jaak J. K. Daemen4State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, ChinaState Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, ChinaState Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, ChinaState Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, ChinaEarth and Environmental Science, Nevada University–Reno, Reno, NV, USABecause of complex geo-conditions, many caverns by solution mining in bedded salt rocks have different irregular shapes. To verify the feasibility of using irregular-shaped caverns for underground gas storage (UGS), four typical cavern-shapes are selected, and the stability of each type is evaluated and compared by using the numerical simulation methods. The simulation results show that the UGS salt cavern with irregular wall shape has the lowest volume shrinkage and displacement of the wall rock, but larger plastic zones appear in their overhanging and concave parts. Ellipsoid-shape cavern has the best stability. Cylinder-shape cavern and cuboid-shape cavern have the poorest stability. In these two types of caverns, large deformations occur in the roof and sidewall, which pose a great potential of inducing collapse in the wall rock. By comparison of the stability characteristics in different positions of the wall rock, we found that the roof shape has a much greater influence than the sidewall on the stability of a cavern. The roof must be designed as an arch to improve cavern stability. Treatments to improve the stability of irregularly shaped caverns by changing operational pressure and utilization way or by modifying the caverns' shape are also discussed. So, this study not only determined the stability state of different shaped caverns for gas storage in bedded salt rocks, but also provides the ways to modify the irregular-shaped caverns for storage applications.https://ieeexplore.ieee.org/document/8962071/Natural gas storagebedded salt rockcavern roofcavern stability analysismodifying cavern shape |
| spellingShingle | Wei Liu Zhixin Zhang Jinyang Fan Deyi Jiang Jaak J. K. Daemen Research on the Stability and Treatments of Natural Gas Storage Caverns With Different Shapes in Bedded Salt Rocks IEEE Access Natural gas storage bedded salt rock cavern roof cavern stability analysis modifying cavern shape |
| title | Research on the Stability and Treatments of Natural Gas Storage Caverns With Different Shapes in Bedded Salt Rocks |
| title_full | Research on the Stability and Treatments of Natural Gas Storage Caverns With Different Shapes in Bedded Salt Rocks |
| title_fullStr | Research on the Stability and Treatments of Natural Gas Storage Caverns With Different Shapes in Bedded Salt Rocks |
| title_full_unstemmed | Research on the Stability and Treatments of Natural Gas Storage Caverns With Different Shapes in Bedded Salt Rocks |
| title_short | Research on the Stability and Treatments of Natural Gas Storage Caverns With Different Shapes in Bedded Salt Rocks |
| title_sort | research on the stability and treatments of natural gas storage caverns with different shapes in bedded salt rocks |
| topic | Natural gas storage bedded salt rock cavern roof cavern stability analysis modifying cavern shape |
| url | https://ieeexplore.ieee.org/document/8962071/ |
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