Table 1
Oil recovery of heterogeneous sandpacks at different temperatures.
| Number | Sandpack | Porosity | Permeability (µm2) | Permeability ratio | Temperature (°C) | Oil viscosity (mPa s) | Oil recovery (%) |
||
|---|---|---|---|---|---|---|---|---|---|
| Water flooding | Subsequent water flooding after B-PPG treatment | Recovery increment | |||||||
| #1 | k high | 0.385 | 7.81 | 5.54 | 50 | 161.5 | 37.0 | 47.5 | 10.5 |
| k low | 0.370 | 1.41 | 16.9 | 51.8 | 34.9 | ||||
| Total | 27.0 | 49.6 | 22.6 | ||||||
| #2 | k high | 0.385 | 7.50 | 5.17 | 70 | 68.4 | 48.1 | 61.1 | 13.0 |
| k low | 0.369 | 1.45 | 27.6 | 59.7 | 32.1 | ||||
| Total | 37.5 | 60.4 | 22.9 | ||||||
| #3 | k high | 0.390 | 8.38 | 5.51 | 90 | 30.1 | 61.1 | 75.9 | 14.8 |
| k low | 0.372 | 1.52 | 35.7 | 69.7 | 34.0 | ||||
| Total | 47.7 | 72.6 | 24.9 | ||||||