Experimental Study on the Cause of Inorganic Scale Formation in the Water Injection Pipeline of Tarim Oilfield

Table 3

Water quality test results (g/L).

Project	#1	#2	#3	#4	#5
,	0.558	0.217	0.178	0.176	0.178
Ba^2+	0.060	0.139	0.136	0.294	0.134
Sr^2+	0.230	0.289	0.284	0.295	0.291
Ca^2+	4.050	4.849	5.100	5.251	5.062
Mg^2+	0.367	0.431	0.576	0.449	0.581
Cl^−	55.800	56.810	56.450	55.160	55.320
pH	5.600	6.000	6.000	6.000	6.000
K^+	1.046	1.046	0.338	0.437	0.337
Na^+	44.409	96.500	61.500	95.300	74.601
	0.511	0.662	0.613	0.621	0.621
Fe	0.004	0.007	0.004	0.003	0.004
Sulfide	0.301	0.014	0.014	0.015	0.017
TSP	0.140	0.137	0.134	0.124	0.111
COD	4.158	4.982	5.029	5.045	5.111
	0.004	0.0001	0.001	0.000	0.000
Oxygen	0.000	0.000	0.000	0.000	0.000