Table 4: Water cut classification in 1# test area.

Water cut classification (%)	Before injecting profile control agent			After injecting profile control agent
	Well number	Ratio (%)	Oil production (t/d)	Well number	Ratio (%)	Oil production (t/d)
<80	19	28	341	22	33	433
80~85	15	22	111	19	28	141
85~90	12	18	61	13	19	70
90~95	13	19	46	12	18	43
>95	8	12	12	1	1	1
Total	67	100	572	67	100	686