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TableĀ 6 Residual oil saturations and % of heavy oil recovery enhancement following hot water injection and chemical surfactant injection

From: Injection of biosurfactant and chemical surfactant following hot water injection to enhance heavy oil recovery

Core No. Initial water saturation, % Initial oil saturation, % Residual oil saturation after hot water injection, % Residual oil saturation after chemical surfactant injection, % % of heavy oil recovery enhancement
1 11.0 89.0 91.5 89.0 2.5
3 10.5 89.5 83.0 75.0 8.0
5 12.0 88.0 95.8 94.4 1.4
7 10.0 90.0 57.0 46.0 11.0