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Prediction of Wax Precipitation Temperature in Petroleum Fluids

Received: 12 January 2021     Accepted: 15 February 2021     Published: 4 March 2021
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Abstract

The precipitation and deposition of wax has remained a major challenge that the oil industries is faced with during the production of waxy crude. This problem is simply an issue from the wellbore to the surface facilities. As a result of this, millions of dollars has been invested in remedial operations. In this research, a predictive model that uses thermodynamic relationship in predicting precipitation of wax has been developed. K-values for the solid-liquid equilibrium is described using solubility parameter, melting point temperature, enthalpy of fusion, and the molar volume for the components. The weight fraction was used to describe the wax mixture. Experimental data from three oil mixtures were used in comparing the model predicted wax appearance temperature (WAT). For oil mixA, the experimental value is 294.15K; Pauly et al predicted 302.15K while this work predicted 301.21K. For oil mixB, the experimental value is 300.15K; Pauly et al predicted 310.15K while this work predicted 308.91K. For oil mixC, the experimental value is 298.15K; Pauly et al predicted 302.15K while this work predicted 300.38K. The obtained results from this research confirmed the capability of the model in predicting Wax Appearance Temperature. A more conservative value for the WAT was predicted which is an improvement.

Published in International Journal of Oil, Gas and Coal Engineering (Volume 9, Issue 1)
DOI 10.11648/j.ogce.20210901.12
Page(s) 6-11
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2021. Published by Science Publishing Group

Keywords

Thermodynamic Model, Wax Appearance Temperature, Phase Equilibrium, Flash Calculation, Wax Deposition

References
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  • APA Style

    Onyejekwe Ifeanyichukwu Michael, Duru Ugochukwu Ilozuruike, Obibuike Ubanozie Julian, Uwaezuoke Nnaemeka. (2021). Prediction of Wax Precipitation Temperature in Petroleum Fluids. International Journal of Oil, Gas and Coal Engineering, 9(1), 6-11. https://doi.org/10.11648/j.ogce.20210901.12

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    ACS Style

    Onyejekwe Ifeanyichukwu Michael; Duru Ugochukwu Ilozuruike; Obibuike Ubanozie Julian; Uwaezuoke Nnaemeka. Prediction of Wax Precipitation Temperature in Petroleum Fluids. Int. J. Oil Gas Coal Eng. 2021, 9(1), 6-11. doi: 10.11648/j.ogce.20210901.12

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    AMA Style

    Onyejekwe Ifeanyichukwu Michael, Duru Ugochukwu Ilozuruike, Obibuike Ubanozie Julian, Uwaezuoke Nnaemeka. Prediction of Wax Precipitation Temperature in Petroleum Fluids. Int J Oil Gas Coal Eng. 2021;9(1):6-11. doi: 10.11648/j.ogce.20210901.12

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  • @article{10.11648/j.ogce.20210901.12,
      author = {Onyejekwe Ifeanyichukwu Michael and Duru Ugochukwu Ilozuruike and Obibuike Ubanozie Julian and Uwaezuoke Nnaemeka},
      title = {Prediction of Wax Precipitation Temperature in Petroleum Fluids},
      journal = {International Journal of Oil, Gas and Coal Engineering},
      volume = {9},
      number = {1},
      pages = {6-11},
      doi = {10.11648/j.ogce.20210901.12},
      url = {https://doi.org/10.11648/j.ogce.20210901.12},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ogce.20210901.12},
      abstract = {The precipitation and deposition of wax has remained a major challenge that the oil industries is faced with during the production of waxy crude. This problem is simply an issue from the wellbore to the surface facilities. As a result of this, millions of dollars has been invested in remedial operations. In this research, a predictive model that uses thermodynamic relationship in predicting precipitation of wax has been developed. K-values for the solid-liquid equilibrium is described using solubility parameter, melting point temperature, enthalpy of fusion, and the molar volume for the components. The weight fraction was used to describe the wax mixture. Experimental data from three oil mixtures were used in comparing the model predicted wax appearance temperature (WAT). For oil mixA, the experimental value is 294.15K; Pauly et al predicted 302.15K while this work predicted 301.21K. For oil mixB, the experimental value is 300.15K; Pauly et al predicted 310.15K while this work predicted 308.91K. For oil mixC, the experimental value is 298.15K; Pauly et al predicted 302.15K while this work predicted 300.38K. The obtained results from this research confirmed the capability of the model in predicting Wax Appearance Temperature. A more conservative value for the WAT was predicted which is an improvement.},
     year = {2021}
    }
    

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  • TY  - JOUR
    T1  - Prediction of Wax Precipitation Temperature in Petroleum Fluids
    AU  - Onyejekwe Ifeanyichukwu Michael
    AU  - Duru Ugochukwu Ilozuruike
    AU  - Obibuike Ubanozie Julian
    AU  - Uwaezuoke Nnaemeka
    Y1  - 2021/03/04
    PY  - 2021
    N1  - https://doi.org/10.11648/j.ogce.20210901.12
    DO  - 10.11648/j.ogce.20210901.12
    T2  - International Journal of Oil, Gas and Coal Engineering
    JF  - International Journal of Oil, Gas and Coal Engineering
    JO  - International Journal of Oil, Gas and Coal Engineering
    SP  - 6
    EP  - 11
    PB  - Science Publishing Group
    SN  - 2376-7677
    UR  - https://doi.org/10.11648/j.ogce.20210901.12
    AB  - The precipitation and deposition of wax has remained a major challenge that the oil industries is faced with during the production of waxy crude. This problem is simply an issue from the wellbore to the surface facilities. As a result of this, millions of dollars has been invested in remedial operations. In this research, a predictive model that uses thermodynamic relationship in predicting precipitation of wax has been developed. K-values for the solid-liquid equilibrium is described using solubility parameter, melting point temperature, enthalpy of fusion, and the molar volume for the components. The weight fraction was used to describe the wax mixture. Experimental data from three oil mixtures were used in comparing the model predicted wax appearance temperature (WAT). For oil mixA, the experimental value is 294.15K; Pauly et al predicted 302.15K while this work predicted 301.21K. For oil mixB, the experimental value is 300.15K; Pauly et al predicted 310.15K while this work predicted 308.91K. For oil mixC, the experimental value is 298.15K; Pauly et al predicted 302.15K while this work predicted 300.38K. The obtained results from this research confirmed the capability of the model in predicting Wax Appearance Temperature. A more conservative value for the WAT was predicted which is an improvement.
    VL  - 9
    IS  - 1
    ER  - 

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Author Information
  • Department of Petroleum Engineering, Federal University of Technology, Owerri, Nigeria

  • Department of Petroleum Engineering, Federal University of Technology, Owerri, Nigeria

  • Department of Petroleum Engineering, Federal University of Technology, Owerri, Nigeria

  • Department of Petroleum Engineering, Federal University of Technology, Owerri, Nigeria

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