Table 7
Relevant production properties of both oil injections (O1 and O2) and both oil recovery methods (WF and PF).
| Property | Unit | First oil injection (O1) | Second oil injection (O2) | |
|---|---|---|---|---|
| Start of Test | Irreducible Water Saturation | – | 50.9% ± 2.7% | 50.4% ± 4.3% |
| Start of Test | Oil Effective Permeability at Irreducible Water Saturation | mD | 266.1 ± 7.6 | 152.9 ± 4.5 |
| Start of Test | Oil Mobility | mD/cP | 40.0 ± 1.3 | 23.0 ± 0.7 |
| Property | Unit | Waterflooding (WF) | Polymer flooding (PF) | |
| Breakthrough | Injected Pore Volume | – | 0.043 ± 0.007 | 0.117 ± 0.008 |
| Breakthrough | Cumulative Produced Oil | cm3 | 1.85 ± 0.21 | 4.85 ± 0.21 |
| Breakthrough | Oil Recovery Factor | – | 6.9% ± 0.9% | 17.9% ± 1.9% |
| 95% Water Cut | Injected Pore Volume | – | 6.66 ± 0.16 | 4.74 ± 0.11 |
| 95% Water Cut | Cumulative Produced Oil | cm3 | 11.6 ± 0.2 | 12.9 ± 0.2 |
| 95% Water Cut | Oil Recovery Factor | – | 43.2% ± 3.1% | 47.7% ± 4.6% |
| 95% Water Cut | Cumulative Water-Oil Ratio | – | 30.4 ± 0.6 | 19.0 ± 0.3 |
| End of Test | Injected Pore Volume | – | 25.0 ± 0.6 | 27.7 ± 0.7 |
| End of Test | Cumulative Produced Oil | cm3 | 14.2 ± 0.2 | 16.2 ± 0.2 |
| End of Test | Oil Recovery Factor | – | 52.9% ± 3.7% | 59.7% ± 5.8% |
| End of Test | Cumulative Water-Oil Ratio | – | 94.2 ± 1.4 | 91.5 ± 1.2 |
| End of Test | Residual Oil Saturation | – | 23.1% ± 3.4% | 20.0% ± 4.8% |
| End of Test | Water Effective Permeability at Residual Oil Saturation | mD | 52.7 ± 2.8* | 67.6 ± 3.5* |
| End of Test | Resistance Factor | – | – | 2.28 ± 0.02* |
| End of Test | Residual Resistance Factor | – | – | 0.78 ± 0.01*, † |
| End of Test | In-situ Viscosity | mPa s | 0.545 ± 0.016 | 1.60 ± 0.03* |
| End of Test | Water Terminal Mobility | mD/mPa s | 119 ± 3* | 42.4 ± 2.3* |
| End of Test | Terminal Mobility Ratio | – | 2.98 ± 0.12 | 1.84 0.12 |