Table 1: The comparison of CBM characteristics in different countries.

CBM field Ro
(%)
Depth
(m)
Average permeability
/mD
Methane content /m3/ton Sorption saturation
(%)
Thickness
(m)
Formation pressure
/MPa
Gas production
/m3d
Water production
/ m3d
San Juan
(USA)
0.9-
1.2
100-
1000
>5 12 3-12 0.9-8.9 30 000 0-40
Alberta
(Canada)
0.5-
2.0
200-
700
10-500 1-5 70-97 4-10 1.8-6.3 3000 2
Bowen
(Australia)
1.5 100-
600
0.1-10 0.98-5.88 90-100 5-12 0.9-5.4 6000-30 000 30
Qinshui
(China)
2-4 300-
800
0.02-0.58 13-22 75-90 3.2-
8.6
1.8-4.8 1200 3