UNCONVENTIONAL GAS TECHNOLOGY Conclusion: Life-cycle approach improves coalbed methane production

This series on unconventional gas resources concludes with a discussion of technologies used in the recovery of coalbed methane and potential future research areas. The series has reviewed three main types of unconventional gas reservoirs: tight-gas, shale, and coalbed methane. The flow mechanisms of the different reservoirs increase in complexity from Darcy flow to Fick’s diffusion flow, and include combinations of other mechanisms.Many different technologies and methods have been effective in producing unconventional gas. Part 1 (OGJ, Dec. 17, 2007, p. 39).discussed tight gas reservoirs and included such processes as hydrajet fracturing.3 Part 2 (OGJ, Dec. 24, 2007, p. 41) discuss...

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