Table 6.
Summary of the investigation on the slug size ratio of CAF flooding.
| Run No. | 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|
| Porosity | 17.34 ± 0.15% | 17.09 ± 0.11% | 17.24 ± 0.10% | 17.21 ± 0.10% | 17.15 ± 0.17% |
| Permeability | 409.6 ± 7.1 mD | 402.7 ± 5.2 mD | 408.7 ± 5.6 mD | 415.6 ± 5.3 mD | 401.1 ± 7.8 mD |
| Chemical size in each cycle | 0.1 PV | 0.2 PV | 0.3 PV | 0.4 PV | 0.5 PV |
| Foam size in each cycle | 0.5 PV | 0.4 PV | 0.3 PV | 0.2 PV | 0.1 PV |
| Foam quality | 80% | 80% | 80% | 80% | 80% |
| Cycle number | 3 | 3 | 3 | 3 | 3 |
| Initial oil saturation | 69.9 ± 0.2% | 69.4 ± 0.2% | 70.6 ± 0.2% | 69.1 ± 0.2% | 70.1 ± 0.1% |
| Recovery after water floods | 39.5 ± 0.2% | 40.2 ± 0.2% | 40.5 ± 0.2% | 39.9 ± 0.2% | 40.3 ± 0.2% |
| Recovery by CAF floods | 32.4 ± 0.3% | 35.9 ± 0.4% | 45.6 ± 0.2% | 27.5 ± 0.3% | 20.5 ± 0.2% |
| Cumulative oil recovery | 71.9 ± 0.3% | 76.1 ± 0.3% | 86.1 ± 0.3% | 67.4 ± 0.3% | 60.8 ± 0.3% |