Wetting in Porous Media: A Nuclear Magnetic Resonance Study.
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- Department of Chemistry 
The purpose of this thesis has been to study mechanisms responsible for wettability alteration on reservoir minerals and then to study how surface wettability affects the distribution of immiscible liquids in porous media. Nuclear Magnetic Resonance (NMR) has been the main analytical tool. Papers 1 and 2 provides new insight into the mechanisms responsible for the naturally occurring change in wetting state in quartz and calcite that follows primary drainage. Papers 3 and 4 show the successful development of a novel approach to wettability indications in core sample models based on magnetic susceptibility induced internal gradients.
Has partsPaper I: H. N. Sørgård, C. Totland, W. Nerdal and J. G. Seland, Crude oil adsorbates on calcite and quartz surfaces investigated by NMR spectroscopy, The Journal of Physical Chemistry C, 121, 38, (2017), 20892-20899. Full text not available in BORA due to publisher restrictions. The article is available at: https://doi.org/10.1021/acs.jpcc.7b07125
Paper II: H. N. Sørgård, C. Totland, W. Nerdal and J. G. Seland, Investigating mobility of crude oil adsorbates on mineral surfaces by NMR, Magnetic Resonance Imaging, 56, (2019), 86-89. The article is available in the main thesis. The article is also available at: https://doi.org/10.1016/j.mri.2018.10.002
Paper III: H. N. Sørgård and J. G. Seland, Investigating pore geometry in heterogeneous porous samples using spatially resolved G0-Δχapp and G0-Δν correlations, Journal of Magnetic Resonance, 301, (2019), 40-48. The article is available in the main thesis. The article is also available at: https://doi.org/10.1016/j.jmr.2019.02.008
Paper IV: H. N. Sørgård and J. G. Seland, A fluid specific dimension of confinement as a measure of wettability in porous media, Journal of Magnetic Resonance, 310, (2020), 106663. The article is available in the main thesis. The article is also available at: https://doi.org/10.1016/j.jmr.2019.106663