Experimental Determination of CO<sub>2</sub> Diffusion Coefficient in a Brine-Saturated Core Simulating Reservoir Condition
CO<sub>2</sub> diffusion coefficient plays a crucial part in saline aquifers for the CO<sub>2</sub> storage and the safety of long-term sequestration. Therefore, it is particularly important to measure the diffusion coefficient accurately. As far as we know, there are current...
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MDPI AG
2021-01-01
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| Online Access: | https://www.mdpi.com/1996-1073/14/3/540 |
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| author | Zerong Li Lei Yuan Guodong Sun Junchen Lv Yi Zhang |
| author_facet | Zerong Li Lei Yuan Guodong Sun Junchen Lv Yi Zhang |
| author_sort | Zerong Li |
| collection | DOAJ |
| description | CO<sub>2</sub> diffusion coefficient plays a crucial part in saline aquifers for the CO<sub>2</sub> storage and the safety of long-term sequestration. Therefore, it is particularly important to measure the diffusion coefficient accurately. As far as we know, there are currently no CO<sub>2</sub> brine diffusion data in real cores under reservoir temperature and pressure conditions. In this paper, a study on the CO<sub>2</sub> diffusion coefficient diffused in a brine-saturated Berea core along the radial direction was conducted at temperatures of 313.15 K to 373.15 K and pressures of 8 MPa to 30 MPa. On account of the experimental results, the effect of permeability, NaCl concentration, temperature and pressure on the CO<sub>2</sub> diffusivity is analyzed. The results in this study indicate that the diffusion coefficient increases with increasing permeability, pressure and temperature and decreases with increasing NaCl concentration. However, the relationship between pressure and the diffusion coefficient is not linear. As the pressure gradually increases, the effect of pressure will become weak. In addition, an empirical correlation of the relationship between temperature–pressure and the CO<sub>2</sub> diffusion coefficient could be obtained based on the experimental data. The data in this paper fill the blank on the study of the CO<sub>2</sub> diffusivity in brine under reservoir conditions, which has positive significance for the study of supercritical CO<sub>2</sub> diffusion in a brine-saturated core. |
| first_indexed | 2024-03-09T04:04:31Z |
| format | Article |
| id | doaj.art-5dfac4284f754ed09d4d90cebf2e3b97 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T04:04:31Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-5dfac4284f754ed09d4d90cebf2e3b972023-12-03T14:08:52ZengMDPI AGEnergies1996-10732021-01-0114354010.3390/en14030540Experimental Determination of CO<sub>2</sub> Diffusion Coefficient in a Brine-Saturated Core Simulating Reservoir ConditionZerong Li0Lei Yuan1Guodong Sun2Junchen Lv3Yi Zhang4Key Laboratory of Ocean Energy Utilization and Energy Conservation Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, ChinaKey Laboratory of Ocean Energy Utilization and Energy Conservation Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, ChinaKey Laboratory of Ocean Energy Utilization and Energy Conservation Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, ChinaKey Laboratory of Ocean Energy Utilization and Energy Conservation Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, ChinaKey Laboratory of Ocean Energy Utilization and Energy Conservation Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, ChinaCO<sub>2</sub> diffusion coefficient plays a crucial part in saline aquifers for the CO<sub>2</sub> storage and the safety of long-term sequestration. Therefore, it is particularly important to measure the diffusion coefficient accurately. As far as we know, there are currently no CO<sub>2</sub> brine diffusion data in real cores under reservoir temperature and pressure conditions. In this paper, a study on the CO<sub>2</sub> diffusion coefficient diffused in a brine-saturated Berea core along the radial direction was conducted at temperatures of 313.15 K to 373.15 K and pressures of 8 MPa to 30 MPa. On account of the experimental results, the effect of permeability, NaCl concentration, temperature and pressure on the CO<sub>2</sub> diffusivity is analyzed. The results in this study indicate that the diffusion coefficient increases with increasing permeability, pressure and temperature and decreases with increasing NaCl concentration. However, the relationship between pressure and the diffusion coefficient is not linear. As the pressure gradually increases, the effect of pressure will become weak. In addition, an empirical correlation of the relationship between temperature–pressure and the CO<sub>2</sub> diffusion coefficient could be obtained based on the experimental data. The data in this paper fill the blank on the study of the CO<sub>2</sub> diffusivity in brine under reservoir conditions, which has positive significance for the study of supercritical CO<sub>2</sub> diffusion in a brine-saturated core.https://www.mdpi.com/1996-1073/14/3/540CO<sub>2</sub>diffusion coefficientCO<sub>2</sub> geological storagebrine |
| spellingShingle | Zerong Li Lei Yuan Guodong Sun Junchen Lv Yi Zhang Experimental Determination of CO<sub>2</sub> Diffusion Coefficient in a Brine-Saturated Core Simulating Reservoir Condition Energies CO<sub>2</sub> diffusion coefficient CO<sub>2</sub> geological storage brine |
| title | Experimental Determination of CO<sub>2</sub> Diffusion Coefficient in a Brine-Saturated Core Simulating Reservoir Condition |
| title_full | Experimental Determination of CO<sub>2</sub> Diffusion Coefficient in a Brine-Saturated Core Simulating Reservoir Condition |
| title_fullStr | Experimental Determination of CO<sub>2</sub> Diffusion Coefficient in a Brine-Saturated Core Simulating Reservoir Condition |
| title_full_unstemmed | Experimental Determination of CO<sub>2</sub> Diffusion Coefficient in a Brine-Saturated Core Simulating Reservoir Condition |
| title_short | Experimental Determination of CO<sub>2</sub> Diffusion Coefficient in a Brine-Saturated Core Simulating Reservoir Condition |
| title_sort | experimental determination of co sub 2 sub diffusion coefficient in a brine saturated core simulating reservoir condition |
| topic | CO<sub>2</sub> diffusion coefficient CO<sub>2</sub> geological storage brine |
| url | https://www.mdpi.com/1996-1073/14/3/540 |
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