Improving predictions of equation of state by modifying its parameters for super critical components of hydrocarbon reservoir fluids

A. Danesh, D. H. Xu, D. H. Tehrani, A. C. Todd

    Research output: Contribution to journalArticle

    Abstract

    The parameters of equations of state of van der Waals type have been generally correlated by matching the properties of pure substances, and extended to mixtures by employing mixing rules commonly with binary interaction parameters. It is proposed to use equilibrium data on binary systems to determine the attraction term in equations of state (EOS) for super critical components instead of data of pure substances. The proposed method was applied to the Peng-Robinson EOS, as an example, resulting in a significant improvement in predicting the phase behaviour of different types of fluids. As no binary interaction parameters are required in this method the computational requirement for flash calculations is drastically reduced for fluids with many components. The proposed method is particularly advantageous for predicting fluid phase equilibria in compositional reservoir simulators, where the reservoir fluid can be described with any desirable number of components without any significant increase in computational time. © 1995.

    Original languageEnglish
    Pages (from-to)45-61
    Number of pages17
    JournalFluid Phase Equilibria
    Volume112
    Issue number1
    Publication statusPublished - Nov 1995

    Fingerprint

    equations of state
    hydrocarbons
    fluids
    predictions
    simulators
    attraction
    flash
    interactions
    requirements

    Keywords

    • Cubic
    • Equation of state
    • Hydrocarbons
    • Mixing rules
    • Super critical
    • Theory
    • Vapour-liquid equilibria

    Cite this

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    title = "Improving predictions of equation of state by modifying its parameters for super critical components of hydrocarbon reservoir fluids",
    abstract = "The parameters of equations of state of van der Waals type have been generally correlated by matching the properties of pure substances, and extended to mixtures by employing mixing rules commonly with binary interaction parameters. It is proposed to use equilibrium data on binary systems to determine the attraction term in equations of state (EOS) for super critical components instead of data of pure substances. The proposed method was applied to the Peng-Robinson EOS, as an example, resulting in a significant improvement in predicting the phase behaviour of different types of fluids. As no binary interaction parameters are required in this method the computational requirement for flash calculations is drastically reduced for fluids with many components. The proposed method is particularly advantageous for predicting fluid phase equilibria in compositional reservoir simulators, where the reservoir fluid can be described with any desirable number of components without any significant increase in computational time. {\circledC} 1995.",
    keywords = "Cubic, Equation of state, Hydrocarbons, Mixing rules, Super critical, Theory, Vapour-liquid equilibria",
    author = "A. Danesh and Xu, {D. H.} and Tehrani, {D. H.} and Todd, {A. C.}",
    year = "1995",
    month = "11",
    language = "English",
    volume = "112",
    pages = "45--61",
    journal = "Fluid Phase Equilibria",
    issn = "0378-3812",
    publisher = "Elsevier",
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    }

    Improving predictions of equation of state by modifying its parameters for super critical components of hydrocarbon reservoir fluids. / Danesh, A.; Xu, D. H.; Tehrani, D. H.; Todd, A. C.

    In: Fluid Phase Equilibria, Vol. 112, No. 1, 11.1995, p. 45-61.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Improving predictions of equation of state by modifying its parameters for super critical components of hydrocarbon reservoir fluids

    AU - Danesh, A.

    AU - Xu, D. H.

    AU - Tehrani, D. H.

    AU - Todd, A. C.

    PY - 1995/11

    Y1 - 1995/11

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    AB - The parameters of equations of state of van der Waals type have been generally correlated by matching the properties of pure substances, and extended to mixtures by employing mixing rules commonly with binary interaction parameters. It is proposed to use equilibrium data on binary systems to determine the attraction term in equations of state (EOS) for super critical components instead of data of pure substances. The proposed method was applied to the Peng-Robinson EOS, as an example, resulting in a significant improvement in predicting the phase behaviour of different types of fluids. As no binary interaction parameters are required in this method the computational requirement for flash calculations is drastically reduced for fluids with many components. The proposed method is particularly advantageous for predicting fluid phase equilibria in compositional reservoir simulators, where the reservoir fluid can be described with any desirable number of components without any significant increase in computational time. © 1995.

    KW - Cubic

    KW - Equation of state

    KW - Hydrocarbons

    KW - Mixing rules

    KW - Super critical

    KW - Theory

    KW - Vapour-liquid equilibria

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    JO - Fluid Phase Equilibria

    JF - Fluid Phase Equilibria

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