Table 7.
Summary of the investigation on the cycle number of CAF flooding.
| Run No. | 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|
| Porosity | 17.15 ± 0.12% | 17.06 ± 0.18% | 17.24 ± 0.17% | 17.17 ± 0.12% | 17.09 ± 0.12% |
| Permeability | 407.0 ± 6.4 mD | 401.9 ± 8.2 mD | 408.7 ± 7.5 mD | 410.2 ± 6.2 mD | 408.5 ± 6.0 mD |
| Chemical size in each cycle | 0.9 PV | 0.45 PV | 0.3 PV | 0.225 PV | 0.18 PV |
| Foam size in each cycle | 0.9 PV | 0.45 PV | 0.3 PV | 0.225 PV | 0.18 PV |
| Foam quality | 80% | 80% | 80% | 80% | 80% |
| Cycle number | 1 | 2 | 3 | 4 | 5 |
| Initial oil saturation | 69.2 ± 0.1% | 69.7 ± 0.2% | 70.6 ± 0.2% | 70.5 ± 0.2% | 69.9 ± 0.2% |
| Recovery after water floods | 40.5 ± 0.3% | 39.9 ± 0.2% | 40.5 ± 0.2% | 40.2 ± 0.3% | 40.4 ± 0.2% |
| Recovery by CAF floods | 37.5 ± 0.3% | 40.6 ± 0.3% | 45.6 ± 0.4% | 46.6 ± 0.2% | 47.2 ± 0.2% |
| Cumulative oil recovery | 78.0 ± 0.3% | 80.5 ± 0.3% | 86.1 ± 0.4% | 86.8 ± 0.3% | 87.6 ± 0.3% |