Sequestration of carbon dioxide in deep underground reservoirs has been discussed for the reduction of atmospheric greenhouse gas emissions in the short- to medium-term until more sustainable technologies are available. Cost and long-term stability are major factors in adoption, so techniques to improve the storage efficiency and trapping security are essential. Such improvements require modeling of the porous geological formations involved in the sequestration process, and comparison to both lab- and field-based experimental studies. To this end, we are developing a comprehensive, large-scale pore-network model to describe multi-phase flow in porous media, including the structural, dissolution, and mineral trapping regimes. To explore the optimal operating parameters for mineralization trapping, we describe a two-phase pore-network model of brine-saturated aquifers and model the invasion of supercritical carbon dioxide (CO2) into the pore structure. Regularly-aligned 2D and 3D pore networks are constructed, and rules-based transport models are used to characterize the saturation behavior over a range of viscosity and capillary parameters, and coordination numbers. Finally, saturation patterns are presented for model caprock and sandstone reservoir conditions, taking into account different contact angles for CO2 on mica and quartz at supercritical conditions. These saturation patterns demonstrate the importance of surface heterogeneities in pore-scale modeling of deep saline aquifers.
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ASME 2011 5th International Conference on Energy Sustainability
August 7–10, 2011
Washington, DC, USA
Conference Sponsors:
- Advanced Energy Systems Division and Solar Energy Division
ISBN:
978-0-7918-5468-6
PROCEEDINGS PAPER
Characterization of a Two-Phase Pore-Scale Network Model of Supercritical Carbon Dioxide Transport Within Brine-Filled Porous Media Available to Purchase
J. S. Ellis,
J. S. Ellis
University of Toronto, Toronto, ON, Canada
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A. Ebrahimi,
A. Ebrahimi
University of Toronto, Toronto, ON, Canada
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A. Bazylak
A. Bazylak
University of Toronto, Toronto, ON, Canada
Search for other works by this author on:
J. S. Ellis
University of Toronto, Toronto, ON, Canada
A. Ebrahimi
University of Toronto, Toronto, ON, Canada
A. Bazylak
University of Toronto, Toronto, ON, Canada
Paper No:
ES2011-54326, pp. 1307-1314; 8 pages
Published Online:
March 13, 2012
Citation
Ellis, JS, Ebrahimi, A, & Bazylak, A. "Characterization of a Two-Phase Pore-Scale Network Model of Supercritical Carbon Dioxide Transport Within Brine-Filled Porous Media." Proceedings of the ASME 2011 5th International Conference on Energy Sustainability. ASME 2011 5th International Conference on Energy Sustainability, Parts A, B, and C. Washington, DC, USA. August 7–10, 2011. pp. 1307-1314. ASME. https://doi.org/10.1115/ES2011-54326
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