Back to results
US 5,494,108 AGranted
Method for stimulating a coal seam to enhance the recovery of methane from the coal seam
AssigneeAmoco Corporation
InventorsIan D. Palmer, Paul Edwards
Life of this patent
Estimating the term…
Abstract
A method is disclosed for increasing the methane recovery rate through a wellbore which penetrates a coal seam. The invention utilizes the cavitation of the coal seam surrounding the wellbore after a substantial percentage of the original methane-in-place which is available for recovery from the wellbore has been recovered from the coal seam.
Claims13
A method for increasing the methane recovery rate from a well which drains methane from a region of a coal seam, the method comprising the steps of:
- a) recovering a sufficient quantity of an effluent, containing methane, from the coal seam to reduce the formation parting pressure of the region of the coal seam drained by the well by at least 20% of the initial formation parting pressure;
- and thereafter
- b) cavitating the coal seam surrounding a wellbore which penetrates the region of the coal seam drained by the well.
Dependencies are inferred from the claim text.