Simulation Study on the Mechanical Effect of CO<sub>2</sub> Geological Storage in Ordos Demonstration Area
In order to understand the long-term process of CO<sub>2</sub> storage and demonstrate its safety, multi-field coupled numerical simulation is considered a crucial technology in the field of geological CO<sub>2</sub> storage. This study establishes a site-specific homogeneous...
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MDPI AG
2023-12-01
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| Online Access: | https://www.mdpi.com/2073-4441/16/1/144 |
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| author | Chang Li Shuren Hao Shengjie Zhang Yongqing Jiang Zhidong Yi |
| author_facet | Chang Li Shuren Hao Shengjie Zhang Yongqing Jiang Zhidong Yi |
| author_sort | Chang Li |
| collection | DOAJ |
| description | In order to understand the long-term process of CO<sub>2</sub> storage and demonstrate its safety, multi-field coupled numerical simulation is considered a crucial technology in the field of geological CO<sub>2</sub> storage. This study establishes a site-specific homogeneous thermo-hydro-mechanical coupling model based on TOUGH-FLAC3D coupling program using actual stratigraphic data from the Ordos demonstration area. The analysis investigates the transport behavior of CO<sub>2</sub> within the formation considering pore permeability homogeneity, incorporates redistribution of effective stress and rock deformation, and provides a mechanical evaluation of the effectiveness of CO<sub>2</sub> sequestration at this specific site. The findings indicate that: (1) the sealing effect of the cap rock depends on the difference of permeability between the reservoirs. The greater the permeability difference, the better the sealing effect. (2) High pore fluid pressure can lead to a decrease in the effective stress of rocks, causing deformation. After simulation calculations, the maximum deformation of rocks can reach 7.79 mm within a decade of CO<sub>2</sub> injection. (3) Under the condition of continuous CO<sub>2</sub> injection, the pore pressure will not be able to dissipate quickly and will continue to rise, and eventually shear failure will occur in the rock layer, but it is mainly concentrated in the lower part of the cap rock. |
| first_indexed | 2024-03-08T14:55:48Z |
| format | Article |
| id | doaj.art-f13d240ba87f4cd4a41ddd50c4fe43fb |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-08T14:55:48Z |
| publishDate | 2023-12-01 |
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| spelling | doaj.art-f13d240ba87f4cd4a41ddd50c4fe43fb2024-01-10T15:11:50ZengMDPI AGWater2073-44412023-12-0116114410.3390/w16010144Simulation Study on the Mechanical Effect of CO<sub>2</sub> Geological Storage in Ordos Demonstration AreaChang Li0Shuren Hao1Shengjie Zhang2Yongqing Jiang3Zhidong Yi4Harbin Center for General Survey of Natural Resources, CGS, Harbin 150081, ChinaSchool of Civil and Architectural Engineering, East China University of Technology, Nanchang 330013, ChinaSchool of Civil and Architectural Engineering, East China University of Technology, Nanchang 330013, ChinaSchool of Civil and Architectural Engineering, East China University of Technology, Nanchang 330013, ChinaDepartment of Natural Resources of Jiangxi Province, Nanchang 330002, ChinaIn order to understand the long-term process of CO<sub>2</sub> storage and demonstrate its safety, multi-field coupled numerical simulation is considered a crucial technology in the field of geological CO<sub>2</sub> storage. This study establishes a site-specific homogeneous thermo-hydro-mechanical coupling model based on TOUGH-FLAC3D coupling program using actual stratigraphic data from the Ordos demonstration area. The analysis investigates the transport behavior of CO<sub>2</sub> within the formation considering pore permeability homogeneity, incorporates redistribution of effective stress and rock deformation, and provides a mechanical evaluation of the effectiveness of CO<sub>2</sub> sequestration at this specific site. The findings indicate that: (1) the sealing effect of the cap rock depends on the difference of permeability between the reservoirs. The greater the permeability difference, the better the sealing effect. (2) High pore fluid pressure can lead to a decrease in the effective stress of rocks, causing deformation. After simulation calculations, the maximum deformation of rocks can reach 7.79 mm within a decade of CO<sub>2</sub> injection. (3) Under the condition of continuous CO<sub>2</sub> injection, the pore pressure will not be able to dissipate quickly and will continue to rise, and eventually shear failure will occur in the rock layer, but it is mainly concentrated in the lower part of the cap rock.https://www.mdpi.com/2073-4441/16/1/144carbon dioxide geological storagemulti field couplingmechanical propertiesstorage safetynumerical simulation |
| spellingShingle | Chang Li Shuren Hao Shengjie Zhang Yongqing Jiang Zhidong Yi Simulation Study on the Mechanical Effect of CO<sub>2</sub> Geological Storage in Ordos Demonstration Area Water carbon dioxide geological storage multi field coupling mechanical properties storage safety numerical simulation |
| title | Simulation Study on the Mechanical Effect of CO<sub>2</sub> Geological Storage in Ordos Demonstration Area |
| title_full | Simulation Study on the Mechanical Effect of CO<sub>2</sub> Geological Storage in Ordos Demonstration Area |
| title_fullStr | Simulation Study on the Mechanical Effect of CO<sub>2</sub> Geological Storage in Ordos Demonstration Area |
| title_full_unstemmed | Simulation Study on the Mechanical Effect of CO<sub>2</sub> Geological Storage in Ordos Demonstration Area |
| title_short | Simulation Study on the Mechanical Effect of CO<sub>2</sub> Geological Storage in Ordos Demonstration Area |
| title_sort | simulation study on the mechanical effect of co sub 2 sub geological storage in ordos demonstration area |
| topic | carbon dioxide geological storage multi field coupling mechanical properties storage safety numerical simulation |
| url | https://www.mdpi.com/2073-4441/16/1/144 |
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