Table 3. In Situ Gas Content, Sorption Capacity, and GSL of Coal Seamsa.
| sample no. | LGdaf (cm3/g) | DGdaf (cm3/g) | RGdaf (cm3/g) | TGdaf (STP, cm3/g) | sorption time (τ, days) | reservoir temperature (°C) | VL (daf, cm3/g) | PL (kPa) | GSL (%) |
|---|---|---|---|---|---|---|---|---|---|
| CG-1103 | 0.27 | 4.13 | 1.39 | 5.78 | 5.3 | 54.9 | 20.94 | 3011 | 27.60 |
| CG-1104 | 0.36 | 5.16 | 0.74 | 6.26 | 4.6 | 55.6 | 23.62 | 3069 | 26.50 |
| CG-1105 | 0.86 | 10.84 | 0.82 | 12.52 | 3.9 | 58.0 | 21.21 | 3228 | 59.03 |
| CG-1106 | 0.18 | 2.13 | 0.49 | 2.79 | 3.6 | 59.7 | 24.68 | 3014 | 11.30 |
| CG-1107 | 3.35 | 10.28 | 0.30 | 13.94 | 4.1 | 64.4 | 25.48 | 2545 | 54.71 |
| CG-1108 | 2.12 | 9.11 | 0.80 | 12.02 | 4.2 | 50.5 | 20.28 | 3210 | 59.27 |
| CG-1109 | 1.47 | 1.86 | 0.90 | 4.23 | 4.6 | 47.3 | 27.75 | 3185 | 15.24 |
| CG-1110 | 0.83 | 2.81 | 1.29 | 4.93 | 3.7 | 50.8 | 19.95 | 3150 | 24.71 |
| CG-1111 | 0.81 | 3.85 | 1.87 | 6.53 | 3.5 | 48.0 | 18.34 | 3365 | 35.61 |
| CG-1112 | 2.14 | 7.85 | 1.82 | 11.82 | 2.6 | 50.2 | 20.96 | 3442 | 56.39 |
| CG-1113 | 0.36 | 7.35 | 1.89 | 9.60 | 4.6 | 51.6 | 15.20 | 3216 | 63.16 |
| CG-1114 | 1.12 | 8.93 | 0.68 | 10.73 | 4.7 | 53.2 | 25.17 | 3170 | 42.63 |
| CG-1115 | 0.70 | 3.61 | 3.32 | 7.64 | 5.6 | 25.3 | 17.42 | 3055 | 43.86 |
| CG-1116 | 0.62 | 7.77 | 0.33 | 8.71 | 2.9 | 35.2 | 26.92 | 3612 | 32.36 |
| CG-1117 | 1.03 | 10.65 | 1.00 | 12.69 | 2.5 | 35.8 | 17.75 | 3516 | 71.49 |
| CG-1118 | 0.75 | 8.83 | 0.54 | 10.12 | 2.1 | 37.4 | 24.14 | 3502 | 41.92 |
| CG-1119 | 0.79 | 8.79 | 0.73 | 10.31 | 2.4 | 42.7 | 27.19 | 3313 | 37.92 |
| CG-1120 | 1.79 | 13.74 | 1.15 | 16.68 | 2.3 | 35.5 | 17.61 | 3390 | 94.72 |
| CG-1121 | 0.63 | 7.78 | 0.34 | 8.75 | 2.3 | 37.7 | 19.79 | 3210 | 44.21 |
| CG-1122 | 0.57 | 7.99 | 0.52 | 9.08 | 3.1 | 39.6 | 20.80 | 3025 | 43.65 |
| CG-1123 | 1.00 | 11.73 | 0.62 | 13.34 | 2.1 | 36.6 | 20.94 | 3040 | 63.71 |
a
Explanations: daf—dry ash-free basis, LG—lost gas, DG—desorbed gas, RG—residual gas, TG—gas content, STP—standard temperature (30 °C) and pressure (760 mmHg), VL—Langmuir volume, PL—Langmuir pressure, GSL—gas saturation level.