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CO2 geo-storage capacity enhancement via nanofluid priming

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Authors
Al-Anssari, S.
Arif, M.
Wang, Shaobin
Barifcani, Ahmed
Lebedev, Maxim
Iglauer, Stefan
Date
2017
Type
Journal Article

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Al-Anssari, S. and Arif, M. and Wang, S. and Barifcani, A. and Lebedev, M. and Iglauer, S. 2017. CO2 geo-storage capacity enhancement via nanofluid priming. International Journal of Greenhouse Gas Control. 63: pp. 20-25.
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International Journal of Greenhouse Gas Control
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Department of Chemical Engineering
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Abstract

© 2017 Elsevier Ltd CO 2 geo-storage efficiency is strongly influenced by the wettability of the CO 2 -brine-mineral system. With decreasing water-wetness, both, structural and residual trapping capacities are substantially reduced. This constitutes a serious limitation for CO 2 storage particularly in oil-wet formations (which are CO 2 -wet). To overcome this, we treated CO 2 -wet calcite surfaces with nanofluids (nanoparticles dispersed in base fluid) and found that the systems turned strongly water-wet state, indicating a significant wettability alteration and thus a drastic improvement in storage potential. We thus conclude that CO 2 storage capacity can be significantly enhanced by nanofluid priming.