Skip to Main Content
ASME Press Select Proceedings

Geological Engineering: Proceedings of the 1st International Conference (ICGE 2007)

Editor
Baosong Ma
Baosong Ma
Search for other works by this author on:
ISBN:
9780791802922
No. of Pages:
1760
Publisher:
ASME Press
Publication date:
2009

Based on underground hydrodynamic principle, this paper analyzed the production mechanism of coal-bed methane well. The production process of CBM well might be divided into two stages: the initial constant rate stage and the late constant head stage. The drawdown of CBM well is mainly subject to water production rate, coefficient of storage, pumping time, permeability and effective radius. For a single CBM well, the effective radius and the drawdown intensity are limited, which directly leads to low gas production.

According to superposition principle, the pressure interference among CBM wells enhances the drawdown and gas production. Therefore, by large-scale development the daily production per well and accumulative outputs of the CBM wells will increase. At last this paper compared the gas production of different scale CBM well groups by using the COMET2 coal bed methane simulator, and concluded that the smallest reasonable number of wells in a group is 60–80 for CBM ground mass development.

This content is only available via PDF.
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal