The development of a regime-based framework for the analysis of wettability experiments

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    Abstract

    This paper examines the macroscopic consequences of wettability variations at the pore-scale. Important theoretical issues relating to distributed contact angles are examined and a process simulator capable of simulating the full flooding cycle characteristic of laboratory wettability tests is described. Simulations predict that final waterflood recoveries from weakly water-wet, or even weakly oil-wet, systems can often exceed those from strongly water-wet systems even though initial imbibition rates may lead to the opposite conclusion. The underlying pore level physics has been explored by defining a capillarity surface which incorporates the combined effects of both contact angle and pore dimension during the imbibition process. Finally, a regime-based framework has been developed which can be used to reconcile apparently contradictory wettability experiments.

    Original languageEnglish
    Pages (from-to)206-219
    Number of pages14
    JournalChemical Engineering Research and Design
    Volume74
    Issue number2
    Publication statusPublished - 1996

    Keywords

    • Capillarity
    • Network model
    • Pore-scale
    • Wettability

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