Table 3
Oil recovery of heterogeneous sandpacks with different permeability ratios.
| Oil recovery (%) |
|||||||
|---|---|---|---|---|---|---|---|
| Number | Sandpack | Porosity | Permeability (μm2) | Permeability ratio | Water flooding | Subsequent water flooding after B-PPG treatment | Recovery increment |
| #6 | k high | 0.387 | 7.7 | 2.88 | 43.8 | 55.9 | 12.1 |
| k low | 0.374 | 2.67 | 35.2 | 57.9 | 22.7 | ||
| Total | 39.8 | 57.1 | 17.3 | ||||
| #2 | k high | 0.385 | 7.5 | 5.17 | 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 | ||||
| #7 | k high | 0.396 | 12 | 7.50 | 45.3 | 61.5 | 16.2 |
| k low | 0.373 | 1.6 | 23.0 | 62.8 | 39.8 | ||
| Total | 34.1 | 62.3 | 28.2 | ||||