![]() ![]() According to the order in the table, the system viscosity of the scheme gradually increases as does the capillary number, corresponding to the experimental residual oil saturation changes from gradually increasing to decreasing, and the core 3-57 experiment achieves the maximum value. Five flooding experiments are performed in the case that the system viscosity changes. In the curve II 4 experiment the fluid injection velocity remains 0.9 mL/min, but the system interfacial tension is adjusted to 1.50 × 10 − 3 mN/m. Yali Wu, in Development and Application of Classical Capillary Number Curve Theory, 2021 4.4.2.2 Further understanding of the experimental curve of displacement capillary Number in “oil-water coexistence” space ![]()
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