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    The impact of tides on the capillary transition zone

    188663_188663.pdf (787.5Kb)
    Access Status
    Open access
    Authors
    Iglauer, Stefan
    Muggeridge, A.
    Date
    2013
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Iglauer, Stefan and Muggeridge, Ann. 2013. The impact of tides on the capillary transition zone. Transport in Porous Media. [In Press].
    Source Title
    Transport in porous Media
    DOI
    10.1007/s11242-012-0111-0
    ISSN
    0169-3913
    Remarks

    The final publication is available at: http://www.springerlink.com

    URI
    http://hdl.handle.net/20.500.11937/38119
    Collection
    • Curtin Research Publications
    Abstract

    The capillary transition zone, also known as the capillary fringe, is a zone where water saturations decrease with height above the water table/oil–water contact as a result of capillary action. In some oil reservoirs, this zone may contain a significant proportion of the oil in place. In groundwater assessments, the capillary fringe can profoundly affect contaminant transport. In this study, we investigated the influence of a tidally induced, semi-diurnal, change in water table depth on the water saturation distribution in the capillary fringe/transition zone. The investigation used a mixture of laboratory experiments, in which the change in saturation with depth was monitored over a period of 90 days, and numerical simulation. We show that tidal changes in water table depth can significantly alter the vertical water saturation profile from what would be predicted using capillary–gravity equilibrium and the drainage or imbibition capillary pressure curves.

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