Management of by-products from subterranean zones

Details Management of by-products from subterranean zones Management of by-products from subterranean zones

E - Fixed Constructions

21

B

E21B 43/38 (2006.01) E21B 43/00 (2006.01) E21B 43/30 (2006.01)

Patent

CA 2463807

An improved method for management of by-products from subterranean zones, in particular for the dewatering of coal seams, comprising drilling a first well system into a subterranean zone, wherein the first well system comprises a first drainage pattern. By-product and gas from a first volume of the subterranean zone is removed via the first well system. A second well system is drilled into the subterranean zone, wherein the second well system comprises a second drainage pattern, and by-product is moved from a second volume of the subterranean zone to the first volume of the subterranean zone. Gas is then produced from the second volume of the subterranean zone. Subsequent drainage patterns repeat the process.

L'invention concerne un procédé amélioré de gestion de sous-produits provenant de zones souterraines, consistant à forer un premier système de puits dans une zone souterraine, lequel premier système de puits permet de réaliser un premier réseau de drainage. Un sous-produit et un gaz provenant d'un premier volume de la zone souterraine sont retirés par le biais du premier système de puits. Un second système de puits est foré dans la zone souterraine, lequel second système de puits comprend un second système de drainage, et le sous-produit est déplacé du second volume de la zone souterraine au premier volume de la zone souterraine. Le gaz est ensuite produit à partir du second volume de la zone souterraine. Des réseaux de drainage ultérieurs permettent de répéter ce processus.

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