Research Article
Analytical Solutions for Gas-Water Two-Phase Flow in Multiseam Coalbed Methane Production
Table 1
Production of methane and water in No. 3 seam of 1# test well, Shanxi.
| | Stage | Mining time (, d) | Mean daily water production (, m3/d) | Cumulative daily water production (q, m3) | Mean daily gas production (, m3/d) | Cumulative daily gas production (, m3) |
| | (I) Water flow stage | 120 | 3.95 | 482.1 | 0 | 0 | | (II) Free gas desorption | 44 | 4.8 | 211.4 | 3398.4 | 146011 | | (III) Fluctuation desorption | 129 | 2.96 | 381.8 | 3844.2 | 495907 | | (IV) Stable desorption | 1500 | 0.5 | 750 | 2500 | 3750000 | | (V) Decreasing desorption | 1200 | 0.2 | 240 | 500 | 600000 |
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