Research Article
Study on the Key Influential Factors on Water Huff-n-Puff in Ultralow-Permeability Reservoir
Table 3
Static spontaneous imbibition effect of the different boundary condition cores.
| | Core number | Core basic information | Experimental results | | Core permeability (10-3 μm2) | Relative wettability index | Core length (cm) | Boundary condition | Effective area (cm2) | Imbibition recovery (%) | Max imbibition rate (%. h-1) | Imbibition time (h) |
| | 1-3 | 0.9 | 0.79 | 5.2 | Full opening | 50.63 | 31.3 | 4.1 | 76 | | 3-1 | 1.2 | 0.74 | 5.3 | Side opening | 41.61 | 25.9 | 2.7 | 89 | | 3-2 | 1.1 | 0.82 | 5.5 | End opening | 9.81 | 13.6 | 1.5 | 112 | | 3-3 | 1.1 | 0.80 | 5.1 | Top ending | 4.91 | 9.5 | 0.7 | 143 |
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