Mechanism and Prevention Technologies of Reservoir Gas Disaster in Abandoned Oil Well of Coal Mine
AbstractThe reservoir gas disaster has distinct characteristics and is a key factor that threatens the safe and green mining of coal mines in the costorage area of coal and petroleum resources. In order to solve the problem of prevention and control of reservoir gas disasters in coal...
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| Format: | Article |
| Language: | English |
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GeoScienceWorld
2022-12-01
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| Series: | Lithosphere |
| Online Access: | https://pubs.geoscienceworld.org/lithosphere/article/2022/Special%2013/6577339/619274/Mechanism-and-Prevention-Technologies-of-Reservoir |
| _version_ | 1797820257747861504 |
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| author | Yawu Shao Yonglu Suo Jiang Xiao Qiannan Li Tao Yang |
| author_facet | Yawu Shao Yonglu Suo Jiang Xiao Qiannan Li Tao Yang |
| author_sort | Yawu Shao |
| collection | DOAJ |
| description |
AbstractThe reservoir gas disaster has distinct characteristics and is a key factor that threatens the safe and green mining of coal mines in the costorage area of coal and petroleum resources. In order to solve the problem of prevention and control of reservoir gas disasters in coal mines, the characteristics of oil-bed gas disasters in abandoned oil wells in coal mines were analyzed, and the oil-bed gas disaster mechanism of abandoned oil wells without isolation coal pillars was revealed to study the scope of gas disasters around oil wells under the influence of production. The research shows that: (1) abandoned oil well reservoir gas disasters have the characteristics of high gas pressure, high concentration, large lateral influence area, wide vertical sweep range, and frequent disasters, which seriously threaten the safety and green mining of coal mines; (2) divide the reservoir gas disaster of abandoned oil wells into the high-pressure gas disaster in the well and the disaster in the surrounding oil-bed gas enrichment area; (3) according to the numerical simulation results that the maximum damage depth of the coal seam mining floor is 38.6 m and the seepage height of high-pressure oil-bed gas is 40 m, the safety factor k is introduced, and the reservoir gas sweeping range of the abandoned oil well is determined to be 95.4 m below the coal seam to the surface; (4) the comprehensive prevention and control technical scheme of oil-bed gas for controlling high-pressure oil-bed gas in wells by ground plugging and downhole injection and injection of diluent to control enriched areas was proposed, which successfully solved the problem of safe and efficient exploitation of Shuangma coal mine in Ningdong coalfield by abandoned oil wells. The research results provide effective solutions for the realization of green mining in many coal mines in the costorage area of coal and oil resources in China and have important application value for the prevention and control of dynamic disasters in the costorage area of resources. |
| first_indexed | 2024-03-13T09:35:49Z |
| format | Article |
| id | doaj.art-cf04e32f2ded4472ad648cced2c96e76 |
| institution | Directory Open Access Journal |
| issn | 1941-8264 1947-4253 |
| language | English |
| last_indexed | 2024-03-13T09:35:49Z |
| publishDate | 2022-12-01 |
| publisher | GeoScienceWorld |
| record_format | Article |
| series | Lithosphere |
| spelling | doaj.art-cf04e32f2ded4472ad648cced2c96e762023-05-25T14:47:04ZengGeoScienceWorldLithosphere1941-82641947-42532022-12-012022Special 1310.2113/2022/6577339Mechanism and Prevention Technologies of Reservoir Gas Disaster in Abandoned Oil Well of Coal MineYawu Shao0http://orcid.org/0000-0001-7580-8459Yonglu Suo1Jiang Xiao2Qiannan Li3Tao Yang41 School of Energy Xi’an University of Science and Technology Xi’an 710054 Shaanxi China xust.edu.cn1 School of Energy Xi’an University of Science and Technology Xi’an 710054 Shaanxi China xust.edu.cn1 School of Energy Xi’an University of Science and Technology Xi’an 710054 Shaanxi China xust.edu.cn3 Shaanxi Energy Liangshuijing Mining Co. Ltd. Yu lin 719000 Shaanxi China1 School of Energy Xi’an University of Science and Technology Xi’an 710054 Shaanxi China xust.edu.cn AbstractThe reservoir gas disaster has distinct characteristics and is a key factor that threatens the safe and green mining of coal mines in the costorage area of coal and petroleum resources. In order to solve the problem of prevention and control of reservoir gas disasters in coal mines, the characteristics of oil-bed gas disasters in abandoned oil wells in coal mines were analyzed, and the oil-bed gas disaster mechanism of abandoned oil wells without isolation coal pillars was revealed to study the scope of gas disasters around oil wells under the influence of production. The research shows that: (1) abandoned oil well reservoir gas disasters have the characteristics of high gas pressure, high concentration, large lateral influence area, wide vertical sweep range, and frequent disasters, which seriously threaten the safety and green mining of coal mines; (2) divide the reservoir gas disaster of abandoned oil wells into the high-pressure gas disaster in the well and the disaster in the surrounding oil-bed gas enrichment area; (3) according to the numerical simulation results that the maximum damage depth of the coal seam mining floor is 38.6 m and the seepage height of high-pressure oil-bed gas is 40 m, the safety factor k is introduced, and the reservoir gas sweeping range of the abandoned oil well is determined to be 95.4 m below the coal seam to the surface; (4) the comprehensive prevention and control technical scheme of oil-bed gas for controlling high-pressure oil-bed gas in wells by ground plugging and downhole injection and injection of diluent to control enriched areas was proposed, which successfully solved the problem of safe and efficient exploitation of Shuangma coal mine in Ningdong coalfield by abandoned oil wells. The research results provide effective solutions for the realization of green mining in many coal mines in the costorage area of coal and oil resources in China and have important application value for the prevention and control of dynamic disasters in the costorage area of resources.https://pubs.geoscienceworld.org/lithosphere/article/2022/Special%2013/6577339/619274/Mechanism-and-Prevention-Technologies-of-Reservoir |
| spellingShingle | Yawu Shao Yonglu Suo Jiang Xiao Qiannan Li Tao Yang Mechanism and Prevention Technologies of Reservoir Gas Disaster in Abandoned Oil Well of Coal Mine Lithosphere |
| title | Mechanism and Prevention Technologies of Reservoir Gas Disaster in Abandoned Oil Well of Coal Mine |
| title_full | Mechanism and Prevention Technologies of Reservoir Gas Disaster in Abandoned Oil Well of Coal Mine |
| title_fullStr | Mechanism and Prevention Technologies of Reservoir Gas Disaster in Abandoned Oil Well of Coal Mine |
| title_full_unstemmed | Mechanism and Prevention Technologies of Reservoir Gas Disaster in Abandoned Oil Well of Coal Mine |
| title_short | Mechanism and Prevention Technologies of Reservoir Gas Disaster in Abandoned Oil Well of Coal Mine |
| title_sort | mechanism and prevention technologies of reservoir gas disaster in abandoned oil well of coal mine |
| url | https://pubs.geoscienceworld.org/lithosphere/article/2022/Special%2013/6577339/619274/Mechanism-and-Prevention-Technologies-of-Reservoir |
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