Effect of Numerical Error Due to Heterogeneous Permeability on the Onset of Convection in CO2 storage

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    Abstract

    Convective mixing in CO2 storage has been studied experimentally, numerically and theoretically using linear stability analysis. Perturbations that triggers convective fingers in these studies have been reported to be due to imperfections in experimental setup, due to numerical errors in simulations, and stated to be artificial in theoretical studies. In this work, the effect of numerical errors on the onset of convective mixing are investigated. Regions where convective downwelling fingers occur are observed to possess convergence problems. By assigning non-uniform permeability values to grid blocks near CO2 and brine interface, the numerical error in these grid blocks is exacerbated. The number of grid blocks with non-uniform permeability values affects the number of downwelling convective fingers but do not influence the time of onset of convection.
    Original languageEnglish
    Title of host publicationConference Proceedings, 81st EAGE Conference and Exhibition 2019
    PublisherEuropean Association of Geoscientists and Engineers
    Pages1-5
    Number of pages5
    DOIs
    Publication statusPublished - 3 Jun 2019
    Event81st EAGE Conference and Exhibition 2019 - London, United Kingdom
    Duration: 3 Jun 20196 Jun 2019
    https://www.spe.org/events/en/2019/conference/19euro/spe-europec-featured-at-81st-eage-conference-and-exhibition.html

    Publication series

    Name
    ISSN (Electronic)2214-4609

    Conference

    Conference81st EAGE Conference and Exhibition 2019
    CountryUnited Kingdom
    CityLondon
    Period3/06/196/06/19
    Internet address

    Keywords

    • Onset of Convection
    • CO2 storage
    • heterogeneous permeability

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