A New Method to Calculate the Relative Permeability of Oil and Water in Tight Oil Reservoirs by Considering the Nonlinear Flow

Table 1

Methods to obtain the oil-water relative permeability.

Laboratory measurement method	Steady-state method
	Unsteady-state method	JBN method	Johnson, Bossler, and Naumann (1959)
		Improved JBN method	Givan (1989) and Li (1994) consider the capillary pressure
			Song et al. (2000) considers the pseudo-starting pressure gradient
			Ren et al. (2018) consider the characteristics of nonlinear seepage
Theoretical model	Babchin et al. (2016), Wang et al. (2019), Su and Wang et al. (2019), Su and Zhang et al. (2020)
Method of numerical simulation	Givan (1987); Qader (1988); Firozabadi and Aziz (1991)