Method of increasing the rate of production of methane from...

Details Method of increasing the rate of production of methane from... Method of increasing the rate of production of methane from...

E - Fixed Constructions

21

B

166/31

E21B 43/28 (2006.01) E21B 43/00 (2006.01) E21B 43/25 (2006.01) E21B 43/26 (2006.01)

Patent

CA 2038290

ABSTRACT OF THE DISCLOSURE A method of increasing the rate of methane pro- duction from a coal seam includes introducing a desired volume of a gas, that causes coal to swell, into the coal seam adjacent a wellbore, maintaining the coal seam adja- cent the wellbore in a pressurized condition for a period of time to permit the gas to contact a desired area of the coal adjacent the wellbore, and relieving the pressure within the coal seam by permitting fluids to flow out from the wellbore at a rate essentially equivalent to the maxi- mum rate permitted by the wellbore and any surface well- bore flow control equipment. Uneven stress fractures should be created in the coal by this method which will increase the near wellbore permeability of the coal seam.

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