An Investigation of the Robustness of Physical and Numerical Vanishing Interfacial Tension Experimentation in Determining CO₂ + Crude Oil Minimum Miscibility Pressure

Table 3

Deviation of the experimental VIT MMP [15, 16] and the calculated (parachor based, this study) VIT MMP at 114.4°C (238°F) for constant and variable mol ratio feed mixtures of CO₂ + live crude oil system reported by Sequeira [15] and Sequeira et al. [16].

System	System type	Highest experimental; pressure (MPa)	Deviation of the calculated (parachor) VIT MMP from the measured VIT MMP (%)
			IFT data points in low IFT region (<1 mN/m)
89 + 11	Constant mol ratio	41.3	−1.0
70 + 30	Constant mol ratio	41.3	−8.3
88–95 mol% CO2	Variable mol ratio; (constant volume ratio: 85 + 15)	34.5	+5.5
53–74 mol% CO2	Variable mol ratio; (constant volume ratio: 45 + 55)	41.3	−3.7