Evaluation of Improving Water Flooding Technology by Volume Fracturing of Water Injection Wells in Complex Fractured Reservoirs: A Case Study of Chang 6 Reservoirs in Huaqing Oilfield, Ordos Basin

Table 4

Production performance of single well before and after volume fracturing test of well cluster Y 306-611.

Production well	Tracer breakthrough time; (d)	Tracer peak propulsion velocity; (m/d)	Before test			At present			Contrast
			Liquid production(m^3/d)	Oil production(m^3/d)	Water ratio(%)	Liquid production(m^3/d)	Oil production(m^3/d)	Water ratio(%)	Oil production(m^3/d)	Water ratio(%)
Y 305-60	30	16.1	Shut-in well for high water content			6.2	1.5	76.0	1.63	-20.7
Y 306-60	42	6.5	6.1	0.1	98.8	1.2	0	100	0.11	-2.1
Y 306-62	34	8.1	3.1	1.1	59.2	1.8	1.3	29.2	0.20	-30.0
Y 307-61	4	68.5	4.4	0.5	87.7	1.3	0.7	50.0	0.21	-37.7
Y 305-61	/	/	1.9	1.5	10.0	2.7	2.4	12.0	0.89	2.0
Y 305-62	/	/	Shut-in well for high water content			Shut-in well for high water content			/	/
Y 307-60	/	/	3.3	0.3	88.5	1.5	0.7	55.6	0.36	-32.8
Y 307-62	/	/	2.2	0.8	56.2	1.2	1.1	10.6	0.28	-45.7