Method of increasing the permeability of a coal seam
Patent
·
OSTI ID:5114575
This patent describes a method of increasing the rate of methane production from a subterranean coal seam penetrated by a wellbore. It comprises: introducing fluid that causes coal to swell into the subterranean coal seam through the wellbore at a pressure above ambient reservoir pressure at the wellbore and below a fracture pressure of the coal seam; maintaining the injected fluid in the coal seam in a pressurized condition so that the fluid will contact the coal seam; and relieving the pressure within the coal seam by permitting the fluid to flow out from the wellbore prior to the pressure within the coal seam decreasing to a stabilized pressure.
- Assignee:
- Amoco Corp., Chicago, IL (USA)
- Patent Number(s):
- A; US 5014788
- Application Number:
- PPN: US 7-511497
- OSTI ID:
- 5114575
- Country of Publication:
- United States
- Language:
- English
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