Quantitative dependence of CH4-CO2 dispersion on immobile water fraction

    Research output: Contribution to journalArticle

    4 Citations (Scopus)

    Abstract

    Enhanced Gas Recovery (EGR) involves CO2 injection into natural gas reservoirs to both increase gas recovery and trap CO2. EGR viability can be determined by reservoir simulations; however, these require a description of fluid dispersion (mixing) between the supercritical CO2 and natural gas. Here, this dispersivity (α) in sandstone rock plugs as a function of residual water fraction is quantified. To ensure the accuracy of such data, a novel core flooding experimental protocol that ensured an even spatial distribution of water was designed, minimized erroneous entry/exit contributions to mixing, and minimized dissolution of the CO2 into the water phase. Dispersivity was found to increase significantly with water content, although the differences in α between sandstones were eliminated upon the inclusion of residual water. This enabled development of a correlation between α and water content and, hence, between the dispersion coefficient and Peclet number that is readily incorporable into reservoir simulations.

    Original languageEnglish
    Pages (from-to)5159-5168
    JournalAIChE Journal
    Volume63
    Issue number11
    DOIs
    Publication statusPublished - Nov 2017

    Fingerprint

    Water
    Gases
    Sandstone
    Recovery
    Natural Gas
    Water content
    Natural gas
    Peclet number
    Spatial distribution
    Oil and Gas Fields
    Dissolution
    Rocks
    Fluids
    Injections

    Cite this

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    title = "Quantitative dependence of CH4-CO2 dispersion on immobile water fraction",
    abstract = "Enhanced Gas Recovery (EGR) involves CO2 injection into natural gas reservoirs to both increase gas recovery and trap CO2. EGR viability can be determined by reservoir simulations; however, these require a description of fluid dispersion (mixing) between the supercritical CO2 and natural gas. Here, this dispersivity (α) in sandstone rock plugs as a function of residual water fraction is quantified. To ensure the accuracy of such data, a novel core flooding experimental protocol that ensured an even spatial distribution of water was designed, minimized erroneous entry/exit contributions to mixing, and minimized dissolution of the CO2 into the water phase. Dispersivity was found to increase significantly with water content, although the differences in α between sandstones were eliminated upon the inclusion of residual water. This enabled development of a correlation between α and water content and, hence, between the dispersion coefficient and Peclet number that is readily incorporable into reservoir simulations.",
    keywords = "Carbon dioxide, Core flooding, Dispersion, Enhanced gas recovery, Sequestration",
    author = "Marco Zecca and Vogt, {Sarah J.} and Abdolvahab Honari and Gongkui Xiao and Fridjonsson, {Einar O.} and May, {Eric F.} and Johns, {Michael L.}",
    year = "2017",
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    Quantitative dependence of CH4-CO2 dispersion on immobile water fraction. / Zecca, Marco; Vogt, Sarah J.; Honari, Abdolvahab; Xiao, Gongkui; Fridjonsson, Einar O.; May, Eric F.; Johns, Michael L.

    In: AIChE Journal, Vol. 63, No. 11, 11.2017, p. 5159-5168.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Quantitative dependence of CH4-CO2 dispersion on immobile water fraction

    AU - Zecca, Marco

    AU - Vogt, Sarah J.

    AU - Honari, Abdolvahab

    AU - Xiao, Gongkui

    AU - Fridjonsson, Einar O.

    AU - May, Eric F.

    AU - Johns, Michael L.

    PY - 2017/11

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    AB - Enhanced Gas Recovery (EGR) involves CO2 injection into natural gas reservoirs to both increase gas recovery and trap CO2. EGR viability can be determined by reservoir simulations; however, these require a description of fluid dispersion (mixing) between the supercritical CO2 and natural gas. Here, this dispersivity (α) in sandstone rock plugs as a function of residual water fraction is quantified. To ensure the accuracy of such data, a novel core flooding experimental protocol that ensured an even spatial distribution of water was designed, minimized erroneous entry/exit contributions to mixing, and minimized dissolution of the CO2 into the water phase. Dispersivity was found to increase significantly with water content, although the differences in α between sandstones were eliminated upon the inclusion of residual water. This enabled development of a correlation between α and water content and, hence, between the dispersion coefficient and Peclet number that is readily incorporable into reservoir simulations.

    KW - Carbon dioxide

    KW - Core flooding

    KW - Dispersion

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    KW - Sequestration

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