Table 5: Character parameters of oil phase seepage at Swc

Describing parameters	Regression formulas at Swc	Correlation Coefficient
Min start-up pressure gradient (MPa/cm)	(∆pL)min=0.0363(kgμo)-0.677	R2=0.93
Threshold pressure (MPa/cm)	(∆pL)thres=0.0768(kgμo)-0.601	R2=0.8766
Max start-up pressure gradient (MPa/cm)	(∆pL)max=0.1849(kgμo)-0.539	R2=0.7993
Non-linear segment	a=0.5139(kgμo)2-0.8114kgμo+0.7928	R2=0.9922
	b=-0.0016kgμo2+0.068kgμo-0.0035	R2=0.7406
	c=-0.002ln⁡kgμo-0.0025	R2=0.4808
Quasi-linear segment	α=0.1658(kgμo)1.0607	R2=0.9097
	β=0.0127(kgμo)0.4599	R2=0.7775