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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

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