P V (1.18266p/1+0.00276p) Gp Wp Eg Gp+Wp*Eg 2322.66*(345.1-V)-3.879*Eg
Psi scf/ton MMscf MM STB scf/bbl MM scf  
1500 345.1342412 0 0 599.21 0 0
1315 335.939409 265.086 0.157 526.87 347.80459 19312.74024
1021 316.2672893 968.41 0.290238 399.04 1084.226572 65500.23825
814.4 296.5622611 1704.033 0.368292 312.11 1818.980616 111605.5207
664.9 277.3602262 2423.4 0.425473 251.04 2530.210742 156442.2095
571.1 262.1720704 2992.901 0.464361 213.57 3092.074579 191864.4776
Table 2: Values showing the Material balance equation for coalbed methane reservoirs.