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    Impact of salinity on CO<inf>2</inf>containment security in highly heterogeneous reservoirs

    Access Status
    Fulltext not available
    Authors
    Al-Khdheeawi, E.
    Vialle, Stephanie
    Barifcani, Ahmed
    Sarmadivaleh, Mohammad
    Zhang, Y.
    Iglauer, Stefan
    Date
    2017
    Type
    Journal Article
    
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    Citation
    Al-Khdheeawi, E. and Vialle, S. and Barifcani, A. and Sarmadivaleh, M. and Zhang, Y. and Iglauer, S. 2017. Impact of salinity on CO<inf>2</inf>containment security in highly heterogeneous reservoirs. Greenhouse Gases: Science and Technology.
    Source Title
    Greenhouse Gases: Science and Technology
    DOI
    10.1002/ghg.1723
    ISSN
    2152-3878
    School
    WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
    URI
    http://hdl.handle.net/20.500.11937/63429
    Collection
    • Curtin Research Publications
    Abstract

    © 2017 Society of Chemical Industry and John Wiley & Sons, Ltd. It is well established that brine salinity can vary substantially in prospective CO 2 geo-storage reservoirs. However, the impact of salinity on containment security has received only little attention. We thus used a compositional reservoir simulation to evaluate the effect of salinity on CO 2 plume migration and CO 2 trapping capacities in a 3D heterogeneous reservoir. The used heterogeneous reservoir consists of two formations: the bottom part of the reservoir is a fluvial reservoir, and the top part represents a near-shore environment. Our results clearly indicate that salinity has a significant influence on CO 2 migration and the relative amount of mobile, residual, and dissolved CO 2 . Lower salinity decreases CO 2 mobility and migration distance, and enhances residual and solubility trapping significantly. We thus conclude that brine salinity is an important impact factor in the context of CO 2 geo-storage, and that less saline reservoirs are preferable CO 2 sinks due to increased storage capacity and containment security.

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