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    Wetting Dynamics of Spontaneous Imbibition in Porous Media: From Pore Scale to Darcy Scale

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    Name:
    Geophysical Research Letters - ...
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    Author
    Qin, C.-Z.
    Wang, X. cc
    Hefny, M.
    Zhao, J.
    Chen, S.
    Guo, B.
    Affiliation
    Department of Hydrology and Atmospheric Sciences, University of Arizona
    Issue Date
    2022
    Keywords
    nonequilibrium model
    pore-scale modeling
    relative permeability
    spontaneous imbibition
    wetting dynamics
    
    Metadata
    Show full item record
    Publisher
    John Wiley and Sons Inc
    Citation
    Qin, C.-Z., Wang, X., Hefny, M., Zhao, J., Chen, S., & Guo, B. (2022). Wetting Dynamics of Spontaneous Imbibition in Porous Media: From Pore Scale to Darcy Scale. Geophysical Research Letters.
    Journal
    Geophysical Research Letters
    Rights
    Copyright © 2022. American Geophysical Union. All Rights Reserved.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    Spontaneous imbibition plays an important role in many subsurface and industrial applications. Unveiling pore-scale wetting dynamics, and particularly its upscaling to the Darcy model, are still unresolved. We conduct image-based pore-network modeling of cocurrent spontaneous imbibition and the corresponding quasi-static imbibition in homogeneous sintered glass beads and heterogeneous Estaillades carbonate. We find that pore-scale heterogeneity significantly influences entrapment of the nonwetting fluid, which in Estaillades is mainly because of the poor connectivity of pores. We show that wetting dynamics significantly deviates capillary pressure and relative permeability away from their quasi-static counterparts. Moreover, we propose a nonequilibrium model for wetting permeability that well incorporates flow dynamics. We implement the nonequilibrium model into two-phase Darcy modeling of a 10 cm long medium. Sharp wetting fronts are numerically predicted, which are in good agreement with experimental observations. Our studies provide insights into developing a two-phase imbibition model with measurable material properties. © 2022. American Geophysical Union. All Rights Reserved.
    Note
    6 month embargo; first published: 10 February 2022
    ISSN
    0094-8276
    DOI
    10.1029/2021GL097269
    Version
    Final published version
    ae974a485f413a2113503eed53cd6c53
    10.1029/2021GL097269
    Scopus Count
    Collections
    UA Faculty Publications

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