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

Table 3

CBM well gas and water productivity in the Fanzhuang block.

No.	Gas production		Total water production (m^3)	Gas-water ratio	Drainage and pressure reduction stage
	Average (m^3/d)	Total (m^3)			Number of days (d)	Total discharged water (m^3)	Average daily discharged water (m^3/d)
FZ-1	1238	1770555	967.4	1830.2	210	468.00	2.23
FZ-2	1627	2241711	496.8	4512.3	240	440.30	1.83
FZ-3	1233	1541258	556.1	2771.5	193	403.70	2.09
FZ-4	2238	2715371	899.1	3020.1	233	595.90	2.56
FZ-5	1942	2832225	600.3	4718	258	499.20	1.93
FZ-6	1107	1877232	563.3	3332.6	279	446.30	1.60
FZ-7	1236	1436079	817.2	1757.3	393	549.30	1.40
FZ-8	1029	1099688	648.0	1697.1	366	320.70	0.88
FZ-9	2116	1410890	62.6	22538.1	48	14.60	0.30
FZ-10	2799	964503	57.1	16891.5	83	15.80	0.19
FZ-11	1141	4330482	3897.9	1111	1451	3276.40	2.26
FZ-12	1344	5896287	2404.1	2452.6	1144	1707.00	1.49
FZ-13	1008	3627541	5223.2	694.5	936	2971.20	3.17
FZ-14	1544	6624604	6084.1	1088.8	991	4634.20	4.68
FZ-15	1858	7349913	3661.6	2007.3	1935	3288.00	1.70
FZ-16	1064	3740135	10178	367.5	1896	9162.50	4.83
FZ-17	1346	2349283	2982.9	787.6	456	1174.70	2.58
FZ-18	5399	583072	138.3	4216.0	176	107.90	0.61
FZ-19	4938	2114079	349.9	6042.0	151	13.70	0.09
FZ-20	8249	3089116	30.0	102970.5	55	11.20	0.20
FZ-21	1025	7871921	348.6	22581.5	421	233.50	0.55
FZ-22	1250	9834482	2261.8	4348.1	1087	1825.60	1.68
FZ-23	1020	6859558	793.4	8645.8	356	478.70	1.34
FZ-24	1224	9335585	876.3	10653.4	540	427.80	0.79
FZ-25	8284	4076042	101.4	40197.7	124	29.80	0.24
FZ-26	3855	2070627	437.5	4732.9	183	253.30	1.38
FZ-27	10362	3348692	938.1	3569.7	251	610.80	2.43
FZ-28	8365	2751742	2394.3	1149.3	217	2034.90	9.38
FZ-29	10682	1131285	2073.9	545.5	259	1953.10	7.54
FZ-30	8063	807480	3473.9	232.4	356	3467.00	9.74
FZ-31	6519	81626883	3621.8	22537.7	410	1754.31	4.28