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

Table 4

Increment of recovery and PV under different displacing periods.

Rock samples	Type of experiment	When water content is 95% to 98%			When water content is 98% to the final
		Recovery increment	Injection multiple increment	Recovery/PV	Recovery increment	Injection multiple increment	Recovery/PV
H1-5	Before fractured	2.37	0.57	4.20	1.84	1.03	1.79
	After fractured	2.88	0.78	3.67	2.27	3.76	0.60
H11	Before fractured	2.40	0.51	4.70	1.58	0.75	2.10
	After fractured	3.90	1.56	2.51	2.17	1.93	1.13
H13	Before fractured	2.29	0.60	3.84	1.96	1.22	1.61
	After fractured	4.14	1.58	2.62	2.73	6.26	0.44
H2-12	Before fractured	3.20	0.78	4.10	2.32	2.17	1.07
	After fractured	4.66	1.29	3.61	3.02	4.56	0.66