Pore-Scale Imaging of the Oil Cluster Dynamic during Drainage and Imbibition Using In Situ X-Ray Microtomography

Figure 2

Horizontal cross-sectional slices through the plug (diameter = 1400 voxel) and the image processing workflow of wet and dry images taken during the water-wet plug flooding (slice number = 135, 24.92 mm from the inlet). (a) Filtered dry reference image; (b) pore map obtained from the filtered dry image, where the pore is transparent and the grain is black; (c) filtered wet image, where the darkest phase is oil, the light gray phase is brine, and the intermediate phase is solid particle; (d) combined wet image, where oil, brine, and the solid are dark gray, light gray, and black, respectively; (e) segmented wet image (brine: blue; oil: red; and grains: gray); (f) three-dimensional rendering of the oil phase. Brine and rock are transparent for effective visualization.

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