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    Mixed Fluid Conditions: Capillary Phenomena

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    Type
    Conference Paper
    Authors
    Santamarina, Carlos cc
    Sun, Zhonghao cc
    KAUST Department
    Ali I. Al-Naimi Petroleum Engineering Research Center (ANPERC)
    Earth Science and Engineering Program
    Energy Resources and Petroleum Engineering
    Physical Science and Engineering (PSE) Division
    Date
    2017-07-06
    Online Publication Date
    2017-07-06
    Print Publication Date
    2017-07-06
    Permanent link to this record
    http://hdl.handle.net/10754/625665
    
    Metadata
    Show full item record
    Abstract
    Mixed fluid phenomena in porous media have profound implications on soil-atmosphere interaction, energy geotechnology, environmental engineering and infrastructure design. Surface tension varies with pressure, temperature, solute concentration, and surfactant concentration; on the other hand, the contact angle responds to interfacial tensions, surface topography, invasion velocity, and chemical interactions. Interfaces are not isolated but interact through the fluid pressure and respond to external fields. Jumps, snap-offs and percolating wetting liquids along edges and crevices are ubiquitous in real, non-cylindrical porous networks. Pore- and macroscale instabilities together with pore structure variability-and-correlation favor fluid trapping and hinder recovery efficiency. The saturation-pressure characteristic curve is affected by the saturation-history, flow-rate, the mechanical response of the porous medium, and time-dependent reactive and diffusive processes; in addition, there are salient differences between unsaturation by internal gas nucleation and gas invasion. Capillary forces add to other skeletal forces in the porous medium and can generate open-mode discontinuities when the capillary entry pressure is high relative to the effective stress. Time emerges as an important variable in mixed-fluid conditions and common quasi-static analyses may fail to capture the system response.
    Citation
    Santamarina JC, Sun Z (2017) Mixed Fluid Conditions: Capillary Phenomena. Poromechanics VI. Available: http://dx.doi.org/10.1061/9780784480779.010.
    Sponsors
    Support for this research was provided by the KAUST endowment. Gabrielle E. Abelskamp edited the manuscript.
    Publisher
    American Society of Civil Engineers (ASCE)
    Journal
    Poromechanics VI
    Conference/Event name
    6th Biot Conference on Poromechanics, Poromechanics 2017
    DOI
    10.1061/9780784480779.010
    Additional Links
    http://ascelibrary.org/doi/10.1061/9780784480779.010
    ae974a485f413a2113503eed53cd6c53
    10.1061/9780784480779.010
    Scopus Count
    Collections
    Conference Papers; Ali I. Al-Naimi Petroleum Engineering Research Center (ANPERC); Physical Science and Engineering (PSE) Division; Earth Science and Engineering Program

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