Enhanced Oil Recovery by Cyclic Injection of Wettability Alteration Agent for Tight Reservoirs

Table 1

Characteristic parameters of relative permeability curves.

Parameters	Oil-wet core		Water-wet core
	Oil	Water	Oil	Water
Residual saturation	0.38	0.32	0.38	0.32
Relative permeability endpoints	0.59	0.23	0.59	0.23
Relative permeability exponents	3.3	2.90	2.00	2.00
Capillary pressure endpoints	-5		10
Capillary pressure exponents	2		2