Table 4
Oil recovery of heterogeneous sandpacks with different injected B-PPG slug sizes.
| Oil recovery (%) |
||||||||
|---|---|---|---|---|---|---|---|---|
| Number | Sandpack | Porosity | Permeability (μm2) | Permeability ratio | B-PPG slug size/PV | Water flooding | Subsequent water flooding after B-PPG treatment | Recovery increment |
| #8 | k high | 0.389 | 8.2 | 5.39 | 0.3 | 41.0 | 53.6 | 12.6 |
| k low | 0.372 | 1.52 | 24.3 | 51.4 | 27.1 | |||
| Total | 32.4 | 52.5 | 20.1 | |||||
| #2 | k high | 0.385 | 7.5 | 5.17 | 0.5 | 48.1 | 61.1 | 13.0 |
| k low | 0.369 | 1.45 | 27.6 | 59.7 | 32.1 | |||
| Total | 37.5 | 60.4 | 22.9 | |||||
| #9 | k high | 0.382 | 6.9 | 5.75 | 1 | 42.1 | 54.5 | 12.4 |
| k low | 0.365 | 1.2 | 22.5 | 58.4 | 35.9 | |||
| Total | 32.4 | 56.6 | 24.2 | |||||