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    Effect of wettability heterogeneity and reservoir temperature on CO2 storage efficiency in deep saline aquifers

    Access Status
    Fulltext not available
    Authors
    Al-Khdheeawi, E.
    Vialle, Stephanie
    Barifcani, Ahmed
    Sarmadivaleh, Mohammad
    Iglauer, Stefan
    Date
    2018
    Type
    Journal Article
    
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    Citation
    Al-Khdheeawi, E. and Vialle, S. and Barifcani, A. and Sarmadivaleh, M. and Iglauer, S. 2018. Effect of wettability heterogeneity and reservoir temperature on CO2 storage efficiency in deep saline aquifers. International Journal of Greenhouse Gas Control. 68: pp. 216-229.
    Source Title
    International Journal of Greenhouse Gas Control
    DOI
    10.1016/j.ijggc.2017.11.016
    ISSN
    1750-5836
    School
    WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
    URI
    http://hdl.handle.net/20.500.11937/61237
    Collection
    • Curtin Research Publications
    Abstract

    Reservoir heterogeneity at various length scales is a well-established fact. This includes reservoir wettability - a key factor influencing CO 2 geo-storage efficiency and containment security - which changes with depth, and is generally non-uniform due to different depositional environments and fluid flow paths over geological times. However, the effect of heterogeneous wettability distribution on CO 2 storage efficiency is not understood. Moreover, there is a knowledge gap in terms of how temperature affects capillary and dissolution trapping, CO 2 mobility and vertical CO 2 migration distance, particularly when coupled with wettability heterogeneity effects. Thus, in this work we studied the effect of wettability heterogeneity and reservoir temperature on the vertical CO 2 plume migration, and capillary and dissolution trapping capacities. Our results clearly show that both wettability heterogeneity and reservoir temperature have a significant effect on vertical CO 2 migration, and the associated capillary and dissolution trapping mechanisms: both heterogeneously distributed wettability and higher temperature significantly accelerated the vertical CO 2 migration, CO 2 mobility and solubility trapping, while it reduced residual trapping. We thus conclude that wettability heterogeneity and reservoir temperature are important factors in the context of CO 2 geo-storage, and that heterogeneous wettability and higher reservoir temperatures reduce storage capacity.

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