A Novel Method for Improving Water Injectivity in Tight Sandstone Reservoirs

Table 2

Summary of coreflood experiments and experimental results.

Experiments	Experiment description	WF perm. (mD)	WF + EK perm. (mD)	% Apparent perm. increase
Set 1
Exp. 1	0.5 V/cm at 0.2 cc/min	11.95	16.64	39.25
Exp. 2	1.0 V/cm at 0.2 cc/min	11.71	19.93	70.20
Exp. 3	1.5 V/cm at 0.2 cc/min	12.47	28.22	126.30
Exp. 4	2.0 V/cm at 0.2 cc/min	11.93	55.33	363.79
Set 2
Exp. 5	0.3 cc/min at 1.5 V/cm	9.33	21.89	134.62
Exp. 6	0.4 cc/min at 1.5 V/cm	8.55	19.94	133.22
Exp. 7	0.5 cc/min at 1.5 V/cm	6.98	17.59	152.01
Exp. 8	0.6 cc/min at 1.5 V/cm	7.45	25.30	239.60