Determination of Minimum Miscibility Pressure of CO<sub>2</sub>–Oil System: A Molecular Dynamics Study
CO<sub>2</sub> enhanced oil recovery (CO<sub>2</sub>-EOR) has become significantly crucial to the petroleum industry, in particular, CO<sub>2</sub> miscible flooding can greatly improve the efficiency of EOR. Minimum miscibility pressure (MMP) is a vital factor af...
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MDPI AG
2021-08-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/26/16/4983 |
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| author | Ding Li Shuixiang Xie Xiangliang Li Yinghua Zhang Heng Zhang Shiling Yuan |
| author_facet | Ding Li Shuixiang Xie Xiangliang Li Yinghua Zhang Heng Zhang Shiling Yuan |
| author_sort | Ding Li |
| collection | DOAJ |
| description | CO<sub>2</sub> enhanced oil recovery (CO<sub>2</sub>-EOR) has become significantly crucial to the petroleum industry, in particular, CO<sub>2</sub> miscible flooding can greatly improve the efficiency of EOR. Minimum miscibility pressure (MMP) is a vital factor affecting CO<sub>2</sub> flooding, which determines the yield and economic benefit of oil recovery. Therefore, it is important to predict this property for a successful field development plan. In this study, a novel model based on molecular dynamics to determine MMP was developed. The model characterized a miscible state by calculating the ratio of CO<sub>2</sub> and crude oil atoms that pass through the initial interface. The whole process was not affected by other external objective factors. We compared our model with several famous empirical correlations, and obtained satisfactory results—the relative errors were 8.53% and 13.71% for the two equations derived from our model. Furthermore, we found the MMPs predicted by different reference materials (i.e., CO<sub>2</sub>/crude oil) were approximately linear (R<sup>2</sup> = 0.955). We also confirmed the linear relationship between MMP and reservoir temperature (T<sub>R</sub>). The correlation coefficient was about 0.15 MPa/K in the present study. |
| first_indexed | 2024-03-10T08:32:50Z |
| format | Article |
| id | doaj.art-0a859d4a04f44d20825ee6ef34564b23 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-10T08:32:50Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-0a859d4a04f44d20825ee6ef34564b232023-11-22T08:54:51ZengMDPI AGMolecules1420-30492021-08-012616498310.3390/molecules26164983Determination of Minimum Miscibility Pressure of CO<sub>2</sub>–Oil System: A Molecular Dynamics StudyDing Li0Shuixiang Xie1Xiangliang Li2Yinghua Zhang3Heng Zhang4Shiling Yuan5State Key Laboratory of Petroleum Pollution Control, CNPC Research Institute of Safety & Environment Technology, Beijing 100000, ChinaState Key Laboratory of Petroleum Pollution Control, CNPC Research Institute of Safety & Environment Technology, Beijing 100000, ChinaShengli Oil Field Exploration and Development Research Institute, Dongying 257000, ChinaShengli Oil Field Exploration and Development Research Institute, Dongying 257000, ChinaKey Lab of Colloid and Interface Chemistry, Shandong University, Jinan 250100, ChinaKey Lab of Colloid and Interface Chemistry, Shandong University, Jinan 250100, ChinaCO<sub>2</sub> enhanced oil recovery (CO<sub>2</sub>-EOR) has become significantly crucial to the petroleum industry, in particular, CO<sub>2</sub> miscible flooding can greatly improve the efficiency of EOR. Minimum miscibility pressure (MMP) is a vital factor affecting CO<sub>2</sub> flooding, which determines the yield and economic benefit of oil recovery. Therefore, it is important to predict this property for a successful field development plan. In this study, a novel model based on molecular dynamics to determine MMP was developed. The model characterized a miscible state by calculating the ratio of CO<sub>2</sub> and crude oil atoms that pass through the initial interface. The whole process was not affected by other external objective factors. We compared our model with several famous empirical correlations, and obtained satisfactory results—the relative errors were 8.53% and 13.71% for the two equations derived from our model. Furthermore, we found the MMPs predicted by different reference materials (i.e., CO<sub>2</sub>/crude oil) were approximately linear (R<sup>2</sup> = 0.955). We also confirmed the linear relationship between MMP and reservoir temperature (T<sub>R</sub>). The correlation coefficient was about 0.15 MPa/K in the present study.https://www.mdpi.com/1420-3049/26/16/4983minimum miscible pressureCO<sub>2</sub> enhanced oil recoverymolecular dynamics |
| spellingShingle | Ding Li Shuixiang Xie Xiangliang Li Yinghua Zhang Heng Zhang Shiling Yuan Determination of Minimum Miscibility Pressure of CO<sub>2</sub>–Oil System: A Molecular Dynamics Study Molecules minimum miscible pressure CO<sub>2</sub> enhanced oil recovery molecular dynamics |
| title | Determination of Minimum Miscibility Pressure of CO<sub>2</sub>–Oil System: A Molecular Dynamics Study |
| title_full | Determination of Minimum Miscibility Pressure of CO<sub>2</sub>–Oil System: A Molecular Dynamics Study |
| title_fullStr | Determination of Minimum Miscibility Pressure of CO<sub>2</sub>–Oil System: A Molecular Dynamics Study |
| title_full_unstemmed | Determination of Minimum Miscibility Pressure of CO<sub>2</sub>–Oil System: A Molecular Dynamics Study |
| title_short | Determination of Minimum Miscibility Pressure of CO<sub>2</sub>–Oil System: A Molecular Dynamics Study |
| title_sort | determination of minimum miscibility pressure of co sub 2 sub oil system a molecular dynamics study |
| topic | minimum miscible pressure CO<sub>2</sub> enhanced oil recovery molecular dynamics |
| url | https://www.mdpi.com/1420-3049/26/16/4983 |
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