Research Article
Pore-Scale Imaging of the Oil Cluster Dynamic during Drainage and Imbibition Using In Situ X-Ray Microtomography
Table 2
Statistical parameters associated with the fluid clusters for the two plugs.
| Plug | Experimental process | | | , water | , oil | , water | , oil |
| Water-wet | Vacuum saturation (Exp. number 1) | 97.3% | - | 1.52 | - | 0.77 | - | First drainage (Exp. number 2) | 46.4% | 53.6% | 1.34 | - | 0.75 | - | Second drainage (Exp. number 3) | 31.4% | 68.6% | 0.95 | 0.67 | 0.72 | 0.76 | First imbibition (Exp. number 4) | 67.3% | 32.7% | - | 0.98 | - | 0.76 | Second imbibition (Exp. number 5) | 74.8% | 25.2% | - | 1.06 | - | 0.75 |
| Oil-wet | Vacuum saturation (Exp. number 6) | 95.4% | - | 0.74 | - | 0.74 | - | First imbibition (Exp. number 7) | 34.4% | 65.6% | 0.85 | - | 0.73 | - | Second imbibition (Exp. number 8) | 21.5% | 78.5% | 0.90 | 1.54 | 0.72 | 0.78 | First drainage (Exp. number 9) | 68.3% | 31.7% | - | 1.39 | - | 0.77 | Second drainage (Exp. number 10) | 80.1% | 19.8% | - | 1.12 | - | 0.72 |
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