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. 2017 Sep 7;7:10753. doi: 10.1038/s41598-017-10992-w

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Two-dimensional cross-sections of three-dimensional X-ray micro-tomographic images (upper figures) and three-dimensional renderings of the remaining oil saturation after waterflooding (middle figures) with magnified images of oil ganglia (lower figures) that are highlighted in smaller black cubes within the larger images (middle figures). Samples 1, 2 and 3 are shown in (a,b,c), (d,e,f) and (g,h,i) respectively. The colors show different oil ganglia that appear trapped at the resolution of the image.