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    Compositional modeling of three-phase flow with gravity using higher-order finite element methods

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    Type
    Article
    Authors
    Moortgat, Joachim
    Sun, Shuyu cc
    Firoozabadi, Abbas
    KAUST Department
    Computational Transport Phenomena Lab
    Earth Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2011-05-11
    Online Publication Date
    2011-05-11
    Print Publication Date
    2011-05
    Permanent link to this record
    http://hdl.handle.net/10754/552169
    
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    Abstract
    A wide range of applications in subsurface flow involve water, a nonaqueous phase liquid (NAPL) or oil, and a gas phase, such as air or CO2. The numerical simulation of such processes is computationally challenging and requires accurate compositional modeling of three-phase flow in porous media. In this work, we simulate for the first time three-phase compositional flow using higher-order finite element methods. Gravity poses complications in modeling multiphase processes because it drives countercurrent flow among phases. To resolve this issue, we propose a new method for the upwinding of three-phase mobilities. Numerical examples, related to enhanced oil recovery and carbon sequestration, are presented to illustrate the capabilities of the proposed algorithm. We pay special attention to challenges associated with gravitational instabilities and take into account compressibility and various phase behavior effects, including swelling, viscosity changes, and vaporization. We find that the proposed higher-order method can capture sharp solution discontinuities, yielding accurate predictions of phase boundaries arising in computational three-phase flow. This work sets the stage for a broad extension of the higher-order methods for numerical simulation of three-phase flow for complex geometries and processes.
    Citation
    Compositional modeling of three-phase flow with gravity using higher-order finite element methods 2011, 47 (5) Water Resources Research
    Publisher
    American Geophysical Union (AGU)
    Journal
    Water Resources Research
    DOI
    10.1029/2010WR009801
    Additional Links
    http://www.agu.org/pubs/crossref/2011/2010WR009801.shtml
    ae974a485f413a2113503eed53cd6c53
    10.1029/2010WR009801
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Earth Science and Engineering Program; Computational Transport Phenomena Lab

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