Method for enhanced recovery of coal bed methane

Details Method for enhanced recovery of coal bed methane Method for enhanced recovery of coal bed methane

E - Fixed Constructions

21

B

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

Patent

CA 2167707

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.

Le procédé de l'invention permet d'augmenter le taux de récupération de méthane à travers un trou de forage creusé dans une couche de charbon. L'invention utilise la cavitation de la couche de charbon entourant le trou de forage après qu'un pourcentage important du méthane primitif disponible du trou de forage ait été récupéré de la couche de charbon.

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