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Stability Analysis of Polymer Flooding-Produced Liquid in Oilfields Based on Molecular Dynamics Simulation.

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Title: Stability Analysis of Polymer Flooding-Produced Liquid in Oilfields Based on Molecular Dynamics Simulation.
Authors: Huang, Qian1 (AUTHOR), Shen, Mingming1,2 (AUTHOR), Mu, Lingyan2,3 (AUTHOR), Tian, Yuan1 (AUTHOR), Huang, Huirong1,2 (AUTHOR), Long, Xueyuan3 (AUTHOR)
Source: Materials (1996-1944). May2025, Vol. 18 Issue 10, p2349. 21p.
Subjects: Radial distribution function, Interfacial tension, Polymer flooding (Petroleum engineering), Polymer solutions, Manufacturing processes, Molecular dynamics
Abstract: The S oilfield has adopted polymer flooding technology, specifically using partially hydrolyzed polyacrylamide (HPAM), to enhance oil recovery. During the production process, the S oilfield has generated a substantial amount of stable polymer flooding-produced liquid, in which oil droplets are difficult to effectively coalesce, presenting significant challenges in demulsification. This article focuses on the produced fluids from S Oilfield as the research subject, developing a molecular dynamics model for the stability analysis of production liquid, including the molecular dynamics model of an oil–pure water system, an oil–mineralized water system and an oil–polymer–mineralized water system, using the principle of molecular dynamics and combining it with the basic molecular model for analyzing the stability of polymer flooding-production liquid. Through the molecular dynamics simulation of the stability analysis of the extracted liquid, the changing rules of the molecular diffusion coefficient, radial distribution function (RDF), interfacial interaction energy, and interfacial tension under the action of ions as well as polymers in water were investigated. The simulation results demonstrate that the presence of all three inorganic salt ions (Na+, Ca2+, and Mg2+) reduces the interfacial tension between oil and water and stabilizes the interface. Following the addition of polymer, the interfacial tension of the system decreases and the interfacial interaction energy increases significantly, indicating that the stability of the system is significantly enhanced by HPAM. [ABSTRACT FROM AUTHOR]
Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 185475322
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PubTypeId: academicJournal
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  Label: Title
  Group: Ti
  Data: Stability Analysis of Polymer Flooding-Produced Liquid in Oilfields Based on Molecular Dynamics Simulation.
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  Data: <searchLink fieldCode="AR" term="%22Huang%2C+Qian%22">Huang, Qian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shen%2C+Mingming%22">Shen, Mingming</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mu%2C+Lingyan%22">Mu, Lingyan</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tian%2C+Yuan%22">Tian, Yuan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Huang%2C+Huirong%22">Huang, Huirong</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Long%2C+Xueyuan%22">Long, Xueyuan</searchLink><relatesTo>3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. May2025, Vol. 18 Issue 10, p2349. 21p.
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  Data: <searchLink fieldCode="DE" term="%22Radial+distribution+function%22">Radial distribution function</searchLink><br /><searchLink fieldCode="DE" term="%22Interfacial+tension%22">Interfacial tension</searchLink><br /><searchLink fieldCode="DE" term="%22Polymer+flooding+%28Petroleum+engineering%29%22">Polymer flooding (Petroleum engineering)</searchLink><br /><searchLink fieldCode="DE" term="%22Polymer+solutions%22">Polymer solutions</searchLink><br /><searchLink fieldCode="DE" term="%22Manufacturing+processes%22">Manufacturing processes</searchLink><br /><searchLink fieldCode="DE" term="%22Molecular+dynamics%22">Molecular dynamics</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The S oilfield has adopted polymer flooding technology, specifically using partially hydrolyzed polyacrylamide (HPAM), to enhance oil recovery. During the production process, the S oilfield has generated a substantial amount of stable polymer flooding-produced liquid, in which oil droplets are difficult to effectively coalesce, presenting significant challenges in demulsification. This article focuses on the produced fluids from S Oilfield as the research subject, developing a molecular dynamics model for the stability analysis of production liquid, including the molecular dynamics model of an oil–pure water system, an oil–mineralized water system and an oil–polymer–mineralized water system, using the principle of molecular dynamics and combining it with the basic molecular model for analyzing the stability of polymer flooding-production liquid. Through the molecular dynamics simulation of the stability analysis of the extracted liquid, the changing rules of the molecular diffusion coefficient, radial distribution function (RDF), interfacial interaction energy, and interfacial tension under the action of ions as well as polymers in water were investigated. The simulation results demonstrate that the presence of all three inorganic salt ions (Na+, Ca2+, and Mg2+) reduces the interfacial tension between oil and water and stabilizes the interface. Following the addition of polymer, the interfacial tension of the system decreases and the interfacial interaction energy increases significantly, indicating that the stability of the system is significantly enhanced by HPAM. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/ma18102349
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      – Code: eng
        Text: English
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        PageCount: 21
        StartPage: 2349
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      – SubjectFull: Radial distribution function
        Type: general
      – SubjectFull: Interfacial tension
        Type: general
      – SubjectFull: Polymer flooding (Petroleum engineering)
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      – SubjectFull: Polymer solutions
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      – SubjectFull: Manufacturing processes
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      – SubjectFull: Molecular dynamics
        Type: general
    Titles:
      – TitleFull: Stability Analysis of Polymer Flooding-Produced Liquid in Oilfields Based on Molecular Dynamics Simulation.
        Type: main
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          Name:
            NameFull: Huang, Qian
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            NameFull: Shen, Mingming
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            NameFull: Mu, Lingyan
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            NameFull: Tian, Yuan
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            NameFull: Huang, Huirong
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            NameFull: Long, Xueyuan
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            – D: 15
              M: 05
              Text: May2025
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              Y: 2025
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              Value: 18
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