Table 4 Parameters of sand-packed columns used in oil displacement experiment
| Parameter | Inner diameter (cm) | Length (cm) | Pore volume (PV, mL) | Irreducible water saturation (Swc, %) | Porosity (Φ, %) | Permeability to gas (Kg, mD) |
|---|---|---|---|---|---|---|
| Column A | 3.8 | 50 | 220 | 24.32 | 38.82 | 1369 |
| Column B | 3.8 | 50 | 200 | 15.25 | 35.29 | 1285 |