Experimental Investigation of Seepage Mechanism on Oil-Water Two-Phase Displacement in Fractured Tight Reservoir

Table 2

Displacement indices of water-free displacement before and after the construction of fractures.

Flooding characteristics at water-free displacement period
Rock samples	Type of experiment	Injection time (min)	Production rate (mL/min)	Recovery ratio (%)	Injection volume
H1-5	Before fractured	12.23	0.0183	15.61	0.100
	After fractured	6.02	0.0195	8.08	0.053
H11	Before fractured	22.65	0.0103	18.62	0.111
	After fractured	8.00	0.0133	8.25	0.051
H13	Before fractured	36.34	0.0062	20.86	0.115
	After fractured	6.72	0.0139	7.98	0.047
H2-12	Before fractured	18.25	0.0081	12.85	0.070
	After fractured	4.05	0.0178	5.46	0.031