Research Article
Pore-Scale Imaging of the Oil Cluster Dynamic during Drainage and Imbibition Using In Situ X-Ray Microtomography
Table 3
Dynamic changes of each type of remaining oil during the water injection.
| | Plug | Experimental process | Contribution to overall remaining oil volume | Largest individual oil cluster | | Clustered | Multiporous | Columnar | Droplet | Membranous | Volume (106 μm3) | Area (105 μm2) |
| | Water-wet | Exp. number 3 | 87.15% | 8.41% | 2.32% | 1.43% | 0.69% | 2.41 | 4.49 | | Exp. number 4 | 81.43% | 11.78% | 3.06% | 1.95% | 1.78% | 1.57 | 2.76 | | Exp. number 5 | 57.17% | 23.94% | 10.45% | 4.53% | 3.91% | 0.92 | 2.12 |
| | Oil-wet | Exp. number 8 | 96.66% | 1.08% | 0.85% | 0.75% | 0.66% | 18.9 | 25.9 | | Exp. number 9 | 80.73% | 14.45% | 2.67% | 1.24% | 0.91% | 3.70 | 7.10 | | Exp. number 10 | 73.51% | 16.13% | 6.15% | 3.21% | 1.00% | 1.02 | 1.79 |
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