Research Article
Characteristics of In Situ Stress and Reservoir Pressure in Deep Coal Seams and Their Influences on Reservoir Depletion: A Field Case Study
Table 1
Characteristics of gas production stage for DCBM wells.
| | Well number | Target coal seams | Depth
(m) | Rapid-growth gas production stage | Stable gas production stage | Declining gas production stage | Duration
(d) | Average daily gas production rate (m3/d) | Average daily water production rate (m3/d) | Duration (d) | Average daily gas production rate (m3/d) | Average daily water production rate (m3/d) | Duration (d) | Average daily gas production rate (m3/d) | Average daily water production rate (m3/d) |
| | L-1 | No. 8 and 9 | 1996.7 | 123 | 812.1 | 10.0 | 0 | / | / | 288 | 547.9 | 5.3 | | L-2 | No. 8 and 9 | 1889.6 | 134 | 678.8 | 5.0 | 0 | / | / | 104 | 514.3 | 2.8 | | L-3 | No. 8 and 9 | 1928.6 | 90 | 175.0 | 1.6 | 0 | / | / | 245 | 187.7 | 0.7 | | L-4 | No. 8 and 9 | 1873.5 | 102 | 75.7 | 0.9 | 0 | / | / | 91 | 138.6 | 0.2 |
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