Hydrogeochemical Characteristics and Water–Rock Interactions of Coalbed-Produced Water Derived from the Dafosi Biogenic Gas Field in the Southern Margin of Ordos Basin, China

Table 3

Pearson’s correlation matrix between hydrogeochemical parameters of water samples.

	pH	TDS	Na^+	K^+	Mg^2+	Ca^2+	Cl^-	SO4^2-	HCO3^-	CO3^2-
pH	1.000	0.623	0.687	-0.064	-0.376	-0.441	0.119	0.277	0.758	0.808
TDS		1.000	0.994	0.269	0.092	-0.116	0.609	0.577	0.457	0.475
Na^+			1.000	0.200	0.005	-0.201	0.544	0.575	0.549	0.567
K^+				1.000	0.435	0.345	0.461	0.13	-0.329	-0.287
Mg^2+					1.000	0.953	0.827	-0.453	-0.767	-0.589
Ca^2+						1.000	0.684	-0.566	-0.846	-0.666
Cl^-							1.000	-0.122	-0.330	-0.174
SO4^2-								1.000	0.472	0.268
HCO3^-									1.000	0.945
CO3^2-										1.000

Correlation is significant at level (two-tailed). Correlation is significant at (two-tailed).