Table 5
Oil recovery of heterogeneous sandpacks with different B-PPG concentrations.
| Oil recovery (%) |
||||||||
|---|---|---|---|---|---|---|---|---|
| Number | Sandpack | Porosity | Permeability (μm2) | Permeability ratio | Concentration (mg/L) | Water flooding | Subsequent water flooding after B-PPG treatment | Recovery increment |
| #10 | k high | 0.385 | 7.43 | 4.82 | 1000 | 46.2 | 57.3 | 11.1 |
| k low | 0.373 | 1.54 | 21.9 | 51.6 | 29.7 | |||
| Total | 34.1 | 54.5 | 20.4 | |||||
| #2 | k high | 0.385 | 7.5 | 5.17 | 2000 | 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 | |||||
| #11 | k high | 0.390 | 8.5 | 4.94 | 3000 | 44.2 | 58.5 | 14.3 |
| k low | 0.374 | 1.72 | 29.6 | 53.4 | 23.8 | |||
| Total | 36.9 | 55.8 | 18.9 | |||||