Wettability Alteration of Sandstone by Chemical Treatments

Table 3

Contact angle of the sandstone after treatment with FG40.

Concentration of FG40 (%)	0	0.05	0.1	0.2	0.3	0.5
Contact angle (°)
Brine	40	93	142	134	140	130
Normal decane	10	75	88	89	93	84