Table 2.

Determination of connate water saturation from oil injection process.

Core	Total pore volume of the core (ml)	Volume of water expelled from core (ml)	Total oil in place (ml)	Connate volume of water (ml)	${\mathit{S}}_{\mathit{oi}}$	${\mathit{S}}_{\mathit{wc}}$
A	12.48	9.75	9.75	2.73	0.78	0.22
B	12.48	9.60	9.60	2.88	0.77	0.23
C	12.12	9.80	9.80	2.32	0.81	0.19
D	11.77	9.50	9.50	2.27	0.81	0.19