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Determination of Minimum Miscibility Pressure of CO(2)–Oil System: A Molecular Dynamics Study

CO(2) enhanced oil recovery (CO(2)-EOR) has become significantly crucial to the petroleum industry, in particular, CO(2) miscible flooding can greatly improve the efficiency of EOR. Minimum miscibility pressure (MMP) is a vital factor affecting CO(2) flooding, which determines the yield and economic...

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Autores principales: Li, Ding, Xie, Shuixiang, Li, Xiangliang, Zhang, Yinghua, Zhang, Heng, Yuan, Shiling
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8401628/
https://www.ncbi.nlm.nih.gov/pubmed/34443570
http://dx.doi.org/10.3390/molecules26164983
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author Li, Ding
Xie, Shuixiang
Li, Xiangliang
Zhang, Yinghua
Zhang, Heng
Yuan, Shiling
author_facet Li, Ding
Xie, Shuixiang
Li, Xiangliang
Zhang, Yinghua
Zhang, Heng
Yuan, Shiling
author_sort Li, Ding
collection PubMed
description CO(2) enhanced oil recovery (CO(2)-EOR) has become significantly crucial to the petroleum industry, in particular, CO(2) miscible flooding can greatly improve the efficiency of EOR. Minimum miscibility pressure (MMP) is a vital factor affecting CO(2) 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(2) 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(2)/crude oil) were approximately linear (R(2) = 0.955). We also confirmed the linear relationship between MMP and reservoir temperature (T(R)). The correlation coefficient was about 0.15 MPa/K in the present study.
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spelling pubmed-84016282021-08-29 Determination of Minimum Miscibility Pressure of CO(2)–Oil System: A Molecular Dynamics Study Li, Ding Xie, Shuixiang Li, Xiangliang Zhang, Yinghua Zhang, Heng Yuan, Shiling Molecules Article CO(2) enhanced oil recovery (CO(2)-EOR) has become significantly crucial to the petroleum industry, in particular, CO(2) miscible flooding can greatly improve the efficiency of EOR. Minimum miscibility pressure (MMP) is a vital factor affecting CO(2) 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(2) 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(2)/crude oil) were approximately linear (R(2) = 0.955). We also confirmed the linear relationship between MMP and reservoir temperature (T(R)). The correlation coefficient was about 0.15 MPa/K in the present study. MDPI 2021-08-17 /pmc/articles/PMC8401628/ /pubmed/34443570 http://dx.doi.org/10.3390/molecules26164983 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Li, Ding
Xie, Shuixiang
Li, Xiangliang
Zhang, Yinghua
Zhang, Heng
Yuan, Shiling
Determination of Minimum Miscibility Pressure of CO(2)–Oil System: A Molecular Dynamics Study
title Determination of Minimum Miscibility Pressure of CO(2)–Oil System: A Molecular Dynamics Study
title_full Determination of Minimum Miscibility Pressure of CO(2)–Oil System: A Molecular Dynamics Study
title_fullStr Determination of Minimum Miscibility Pressure of CO(2)–Oil System: A Molecular Dynamics Study
title_full_unstemmed Determination of Minimum Miscibility Pressure of CO(2)–Oil System: A Molecular Dynamics Study
title_short Determination of Minimum Miscibility Pressure of CO(2)–Oil System: A Molecular Dynamics Study
title_sort determination of minimum miscibility pressure of co(2)–oil system: a molecular dynamics study
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8401628/
https://www.ncbi.nlm.nih.gov/pubmed/34443570
http://dx.doi.org/10.3390/molecules26164983
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