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Contact Angle Measurements Using Sessile Drop and Micro-CT Data from Six Sandstones

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Abstract

Numerous sessile drop and micro-computed tomography (micro-CT) studies have been conducted to quantify geologic carbon storage formation wettability by measuring static contact angles (θ); however, the influence of pore geometry remains unknown. In this work, six sandstones (Bandera Brown, Berea, Bentheimer, Mt. Simon, Navajo, and Nugget) are used to measure θ using the two aforementioned experimental methods at identical testing conditions (45 °C and 12.41 MPa). The range of θ measured at in situ conditions (micro-CT) exceeds the range at ex situ (sessile drop method) conditions for all sandstones. However, when droplets with more representative in situ diameters are analyzed, θ averages show ex situ θ exceed those of in situ θ. Pore geometry does influence local θ, but the size of ex situ droplets relative to pore size appears to influence θ. This is important to consider for future sessile drop studies used for analysis of CO2 behavior in carbon storage reservoirs.

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Original data sets are uploaded on Digital Rocks Portal (Dalton 2020) for interested researchers.

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Acknowledgements

The authors thank Karl Jarvis for outstanding laboratory effort and Chris Matranga and Sean Sanguinito on research guidance in making this work possible. Thanks are also given to the Oak Ridge Institute for Science and Education (ORISE) for providing this research opportunity and Geologic Storage of CO2 (GSCO2), an Energy Frontier Research Consortium (EFRC) funded by the DOE Office of Basic Science (Grant No. DESC0C12504), for partially funding this research.

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Correspondence to Laura E. Dalton.

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Dalton, L.E., Tapriyal, D., Crandall, D. et al. Contact Angle Measurements Using Sessile Drop and Micro-CT Data from Six Sandstones. Transp Porous Med 133, 71–83 (2020). https://doi.org/10.1007/s11242-020-01415-y

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  • DOI: https://doi.org/10.1007/s11242-020-01415-y

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