Pore-filling and snap-off events superimposed on a pore-throat network extracted from the segmented pore space

This movie shows a pore-throat network extracted from the segmented pore space of a Ketton limestone sample. Here, pores are shown as spheres and throats as tubes connecting adjacent pores. The color bar (0 to 60) shows pore radii in micrometer.
The time-resolved images (only oil as red is show here) from secondary imbibition were superimposed on the pore-throat network to characterize pores and throats involved in various pore-filling (without trapping) and snap-off (with trapping) events. This time-series movie shows a small subset of the complete image of a water-wet carbonate rock (3.8 mm diameter). Brine and pore space are shown transparent and semi-transparent respectively for effective visualization. The X-ray micro-tomographic images were acquired at Diamond Light Source, U.K. (Beamline I-13), with a voxel size of 3.28 µm and a time-resolution of 38 s.