Table 4
Saturations reached during the corefloods. The oil recovery at breakthrough is computed as 1 − Swi − So(BT).
Coreflood | Core treatment | Oil viscosity (cP) | Injection flowrate (cc/min) | Swi (frac.) | So at BT (frac.) | RF at BT (%) |
---|---|---|---|---|---|---|
CF1 | No treatment (water-wet) | 5 | 7.0 | 0.117 | 0.381 | 0.503 |
CF2 | 170 | 1.4 | 0.117 | 0.604 | 0.279 | |
CF3 | 7.0 | 0.12 | 0.660 | 0.220 | ||
CF4 | 320 | 1.4 | 0.119 | 0.618 | 0.269 | |
CF5 | 7.0 | 0.113 | 0.689 | 0.193 | ||
CF6 | Aged core (oil-wet) | 540 | 7.0 | 0.063 | 0.769 | 0.169 |
CF7 | 0.06 | 0.063 | 0.798 | 0.140 | ||
CF8 | 1.4 | 0.053 | 0.776 | 0.171 |