Table 4.
Summary of the injection timing evaluation.
| Run No. | 1 | 2 | 3 | 4 | 5 | 6 |
|---|---|---|---|---|---|---|
| Injection mode | a | b | a | b | a | b |
| Injected amount | 1.8 PV | 1.8 PV | 1.8 PV | 1.8 PV | 1.8 PV | 1.8 PV |
| Initial water cut | 0 | 0 | 60% | 60% | 98% | 98% |
| Water flood recovery | N/A | N/A | 35.3 ± 0.5% | 34.2 ± 0.4% | 40.2 ± 0.4% | 40.8 ± 0.3% |
| EOR recovery | 57.6 ± 0.3% | 64.7 ± 0.2% | 36.0 ± 0.3% | 43.5 ± 0.3% | 27.3 ± 0.3% | 38.4 ± 0.3% |
| Total recovery | 57.6 ± 0.3% | 64.7 ± 0.2% | 71.3 ± 0.3% | 77.7 ± 0.3% | 67.5 ± 0.4% | 79.2 ± 0.3% |