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    Coal wettability after CO2 injection

    Access Status
    Fulltext not available
    Authors
    Al-Yaseri, A.
    Roshan, H.
    Xu, X.
    Zhang, Y.
    Sarmadivaleh, Mohammad
    Lebedev, Maxim
    Barifcani, Ahmed
    Iglauer, Stefan
    Date
    2017
    Type
    Journal Article
    
    Metadata
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    Citation
    Al-Yaseri, A. and Roshan, H. and Xu, X. and Zhang, Y. and Sarmadivaleh, M. and Lebedev, M. and Barifcani, A. et al. 2017. Coal wettability after CO2 injection. Energy and Fuels. 31 (11): pp. 12376-12382.
    Source Title
    Energy and Fuels
    DOI
    10.1021/acs.energyfuels.7b01189
    ISSN
    0887-0624
    School
    Department of Petroleum Engineering
    URI
    http://hdl.handle.net/20.500.11937/60303
    Collection
    • Curtin Research Publications
    Abstract

    Increasing energy demand and associated global warming are unarguably the two major challenges that the world currently faces. One of the ideas to reduce the carbon footprint while increasing the efficiency of the energy extraction is CO 2 sequestration in coal seams. This can additionally enhance the coal-bed methane production. However, this process depends on many factors, among which coal wettability is of particular importance especially because of its pressure and temperature dependency. To evaluate this process, coal wettability was tested by measuring the contact angle of CO 2 and water as a function of pressure, temperature, and salinity (DI water and brine (5 wt % NaCl + 1 wt % KCl), i.e., wt % is the weight percentage of salt to water. The results show that the CO 2 -water contact angle increases significantly, with increasing pressure, temperature, and salinity indicating more-effective CO 2 wetness of coal. This, in turn, can reduce the CO 2 residual trapping capacities and increase methane recovery. Furthermore, we demonstrated that CO 2 density correlates well with coal wettability.

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