Geofluids

Review Article

Review of the Hydrogeological Controls on Coalbed Methane (CBM) and Development Trends

Table 2

Geochemical characteristics of water produced from CBM wells in Qinshui Basin [4, 32–35].


Block	Well sequence number	Major ion concentration (mg·L^-1)						Salinity (mg·L^-1)	Coefficient for sodium-chloride	Desulfurization coefficient
		Na⁺+K⁺	Mg²⁺	Ca²⁺	Cl^-	HCO₃^-	SO₄^2-

Fanzhuang	FZ-1	537.7	4.6	8.65	129	1130.3	1.12	1811.37	6.43	0.32
	FZ-2	703.9	4.65	11.9	308	1341	0.94	2370.39	3.35	0.11
	FZ-3	551.1	1.47	4.13	119	1185.1	0.82	1861.62	7.15	0.25
	FZ-4	640	2.20	4.01	248	1115.9	7.46	2071.57	3.98	1.11
	FZ-5	1061.5	6.55	10.3	981	1019.1	1.62	3080.07	1.67	0.06
	FZ-6	598.07	2.45	4.66	75.5	1366.2	4.47	2051.35	12.23	2.19

North of Shijiazhuang	SJZ-1	476.26	2.36	7.7	37.7	1143	4.95	1718	19.5	4.86
	SJZ-2	391.79	2.50	7.88	42.3	938	0.86	1418	14.3	0.76
	SJZ-3	478.18	3.19	7.38	43.9	1081	1.69	1683	16.81	1.42
	SJZ-4	430.04	2.75	7.06	42.9	978	2.73	1516	15.47	2.35
	SJZ-5	410.09	1.96	6.17	52.3	959	1.68	1469	12.10	1.19
	SJZ-6	402.63	1.87	6.17	5.02	932	4.62	1437	123.79	34.03
	SJZ-7	419.22	2.94	8.12	36.7	953	0.7	1482	17.63	0.71

South of Shijiazhuang	SJZ-8	483.71	2.83	9.08	38.6	1145	2.5	1738	19.34	2.4
	SJZ-9	405.08	2.05	5.81	33.7	968	8.82	1452	18.55	9.68
	SJZ-10	424	1.80	5.60	39.9	1009	2.07	1520	16.40	1.92
	SJZ-11	394.67	2.08	7.44	35.2	906	0.68	1395	17.31	0.71
	SJZ-12	380.05	2.02	7.89	36.2	885	1.57	1358	16.20	1.60
	SJZ-13	401.18	2.50	6.4	36	904	0.33	1409	17.20	0.34

Panzhuang	PZ-1	821.3	7.70	11.3	322.2	1313.7	189.3	2742	3.93	21.73
	PZ-2	610.2	1.05	5.14	60.50	1384	0.59	2130	15.57	0.36
	PZ-3	635.92	4.21	8.09	136	1443	20.9	2258	7.22	5.68
	PZ-4	614.41	5.14	5.02	138	1225	44.9	2112	6.87	12.03
	PZ-5	589.84	7.53	5.89	72.3	1244	57.3	2067	12.59	29.31
	PZ-6	716.63	29.2	41.4	110	997	796	2697	10.06	267.59

South of Sizhuang	SZ-1	419.29	0.43	2.59	93.52	599.86	0.68	4208	6.92	0.27
	SZ-2	278.61	0.17	2.14	86.7	555.04	0.52	5553	4.96	0.22
	SZ-3	318.3	0.3	2.29	81.03	561.94	3.6	2425	6.06	1.64
	SZ-4	747.95	4.24	2.87	336.55	1082.5	0.62	2294	3.43	0.07
	SZ-5	443.03	0.35	2.65	70.35	810.15	0.26	1059	9.72	0.14

Data source from the literature [32–35].