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Updated: Jan 3, 2026

Quantifying Mixing using Magnetic Resonance Imaging
Published on: January 25, 2012
Characterising oil and water in porous media using correlations between internal magnetic gradient and transverse
Aina Marie Løkkevik Bratland1, Tina Pavlin2, Ketil Djurhuus2
1Department of Chemistry, University of Bergen, Allegaten 41, N-5007 Bergen, Norway.
Abstract:
A method for characterising water and oil in a rock core plug using correlations between diffusion decay in internal magnetic gradient and transverse relaxation time (DG02-T2) is presented. The method is evaluated at different saturation levels and is compared with the measurement of correlations between diffusion and transverse relaxation time (D-T2). It is shown how signals from water and oil can be separated based on their difference in diffusion decay in internal gradients. The obtained results show that the impact from heterogeneity in pore geometry and mineralogy on the individual liquids is revealed in more detail in DG02-T2 correlations compared to the more established D-T2 correlations. Measurements of DG02-T2 correlations should be included in the toolbox of NMR experiments performed in the laboratory analysis of rock core plugs, and could then potentially lead to more detailed estimations of saturation levels and surface wettability properties.
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