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The recovery factor of PD and DW displacement with different times.
| Poly-Surfactant Type | Water Flooding Time | Water Flood EOR (%) | Poly-Surfactant Time | Injection Pore Volume (PV) | EOR in 50 min (%) | EOR in 90 min (%) | EOR in 120 min (%) | Total EOR (%) |
|---|---|---|---|---|---|---|---|---|
| DW | 3 h 20 min | 42.73 | 2 h | 2.0 | 10.36 | 12.36 | 55.09 | |
| PD | 3 h 20 min | 44.89 | 2 h | 2.0 | 16.53 | 17.75 | 62.64 | |
| DW | 40 min | 35.75 | 90 min | 0.8 | 17.44 | 18.65 | 54.40 | |
| PD | 40 min | 36.47 | 90 min | 0.8 | 18.74 | 20.08 | 56.55 |
