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Table 7

Relevant production properties of both oil injections (O1 and O2) and both oil recovery methods (WF and PF).

Property Unit First oil injection (O1) Second oil injection (O2)
Start of Test Irreducible Water Saturation – 50.9% ± 2.7% 50.4% ± 4.3%
Start of Test Oil Effective Permeability at Irreducible Water Saturation mD 266.1 ± 7.6 152.9 ± 4.5
Start of Test Oil Mobility mD/cP 40.0 ± 1.3 23.0 ± 0.7
Property Unit Waterflooding (WF) Polymer flooding (PF)
Breakthrough Injected Pore Volume – 0.043 ± 0.007 0.117 ± 0.008
Breakthrough Cumulative Produced Oil cm3 1.85 ± 0.21 4.85 ± 0.21
Breakthrough Oil Recovery Factor – 6.9% ± 0.9% 17.9% ± 1.9%
95% Water Cut Injected Pore Volume – 6.66 ± 0.16 4.74 ± 0.11
95% Water Cut Cumulative Produced Oil cm3 11.6 ± 0.2 12.9 ± 0.2
95% Water Cut Oil Recovery Factor – 43.2% ± 3.1% 47.7% ± 4.6%
95% Water Cut Cumulative Water-Oil Ratio – 30.4 ± 0.6 19.0 ± 0.3
End of Test Injected Pore Volume – 25.0 ± 0.6 27.7 ± 0.7
End of Test Cumulative Produced Oil cm3 14.2 ± 0.2 16.2 ± 0.2
End of Test Oil Recovery Factor – 52.9% ± 3.7% 59.7% ± 5.8%
End of Test Cumulative Water-Oil Ratio – 94.2 ± 1.4 91.5 ± 1.2
End of Test Residual Oil Saturation – 23.1% ± 3.4% 20.0% ± 4.8%
End of Test Water Effective Permeability at Residual Oil Saturation mD 52.7 ± 2.8* 67.6 ± 3.5*
End of Test Resistance Factor – – 2.28 ± 0.02*
End of Test Residual Resistance Factor – – 0.78 ± 0.01*, †
End of Test In-situ Viscosity mPa s 0.545 ± 0.016 1.60 ± 0.03*
End of Test Water Terminal Mobility mD/mPa s 119 ± 3* 42.4 ± 2.3*
End of Test Terminal Mobility Ratio – 2.98 ± 0.12 1.84 0.12
*

Data relative to the second pressure tap.

†

Datum obtained in the water post–flooding step.

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