Modeling of Partially Hydrolyzed Polyacrylamide-Hexamine-Hydroquinone Gel System Used for Profile Modification Jobs in the Oil Field

Table 4

Experimental values of gelation time at different polymer concentration, temperature and pH 7.5 (Constant crosslinker concentration HMTA/HQ 0.4/0.3 wt%).

Sl. No.	Polymer	Crosslinkers		Experimental values of gelation time; (hrs.)	Theoretical values of gelation time; (hrs.)	Temperature; (°C)
	PHPA; (wt%)	HMTA; (wt%)	HQ; (wt%)
1	0.8	0.4	0.3	370	471.4855	80
2	0.9	0.4	0.3	286	255.7604
3	1.0	0.4	0.3	168	147.9839
4	1.1	0.4	0.3	84	90.2116
5	0.8	0.4	0.3	266	235.0542	90
6	0.9	0.4	0.3	135.3	127.5067
7	1.0	0.4	0.3	78	73.7758
8	1.1	0.4	0.3	42.3	44.974
9	0.8	0.4	0.3	133	121.6383	100
10	0.9	0.4	0.3	71	65.9835
11	1.0	0.4	0.3	42	38.1783
12	1.1	0.4	0.3	27	23.2736
13	0.8	0.4	0.3	60	65.1488	110
14	0.9	0.4	0.3	35	35.3404
15	1.0	0.4	0.3	20.3	20.4481
16	1.1	0.4	0.3	12	12.4652
17	0.8	0.4	0.3	39	36.0194	120
18	0.9	0.4	0.3	19	19.539
19	1.0	0.4	0.3	10	11.3053
20	1.1	0.4	0.3	8	6.8917