Chemically induced stimulation of coal cleat formation

Details Chemically induced stimulation of coal cleat formation Chemically induced stimulation of coal cleat formation

E - Fixed Constructions

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B

E21B 43/22 (2006.01) C07C 1/00 (2006.01) C09K 8/66 (2006.01) C09K 8/84 (2006.01) E21B 43/00 (2006.01) E21B 43/17 (2006.01) E21B 43/25 (2006.01) E21B 43/26 (2006.01)

Patent

CA 2196369

A method for increasing the production of methane from a subterranean coal formation by chemically stimulating the formation of cleats in the coal formation in order to facilitate removal of formation water, and increase the rate of methaneproduction from the coal formation. The method comprises injecting an aqueous oxidant solution into the coal formations to stimulate the formation of cleats in the coal formation; and thereafter producing methane from the coal formations at an increased rate. The aqueous oxidant solution preferably comprises hypochlorite, metaic salts of hypochlorous acid, hydrogen peroxide, ozone, oxygen and combinations thereof.

Méthode pour augmenter la production de méthane à partir d'une formation houillère souterraine en provoquant, par des moyens chimiques, la création de limets dans la formation houillère afin de faciliter l'extraction de l'eau renfermée dans la formation et d'augmenter le rendement de la production de méthane à partir de la formation houillère. La méthode comporte également l'injection d'une solution oxydante aqueuse dans les formations houillères pour stimuler la formation de limets dans la formation houillère et pour produire, après, à un taux plus élevé, du méthane à partir des formations houillères. La solution aqueuse oxydante comprend préférablement de l'hypochlorite, des sels métalliques d'acide hypochloreux, du peroxyde d'hydrogène, de l'ozone, de l'oxygène, et des combinaisons de ces produits.

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