Previous economic studies of the recovery and utilization of methane from coalbeds using vertical wells were based on drainage in advance of mining where a single seam is drained with well spacing designed for rapid predrainage. A production economics study has been conducted which shows that the lower overall investment costs for wider spacing and increased production from multiple seams result in gas recovery at costs well below current prices for new gas imports. When applied to some of the thicker, deeper Western coals, the method also results in a favorable ROI.

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