Method of enhancing methane production from coal seams by dewatering
Номер патента: CA2037454A1
Опубликовано: 02-09-1991
Автор(ы): Jerald John Hinkel, Kenneth Nimerick
Принадлежит: Dowell Schlumberger Canada Inc
Опубликовано: 02-09-1991
Автор(ы): Jerald John Hinkel, Kenneth Nimerick
Принадлежит: Dowell Schlumberger Canada Inc
Реферат: ABSTRACT OF THE INVENTION Dewatering of coal seams for facilitating the production of gas therefrom through a well is effected by treating the coal seam utilizing a well treatment fluid containing a dewatering aid which both enhances the permeability of the formation to water production and binds tenaciously to the coal surface so that the permeability enhancement benefits are realized over a long production term. The preferred dewatering surfactants used in the treatment fluid and the process of treating the well are selected from a group consisting of: (a) organic surfactant compounds having the formula R1-O([EO]x-[PO]y-[BO]z)H wherein R1 is an alcohol, phenol or phenol derivative or a fatty acid having 1 to 16 carbon atoms; EO is an ethylene oxide radical and x is 1 to 20; PO is a propylene oxide radical and y is 015 and BO is a butylene oxide radical and z is 1-15; (b) an organic polyethylene carbonate having the formula R2-O(-CH2-CH2-O-?-O-CH2-CH2-)qH wherein R2 is an alcohol having 7 to 16 carbon atoms and q is 7 to 16; (c) butoxylated glycols having 1 to 15 butylene oxide groups, and (d) ethoxylated-butoxylated glycols and 5 to 10 butylene oxide groups. The well treatment fluid may be used in both fracturing and workover operations to enhance and maintain fracture conductivity over an extended period of production.
Method for dehydration and operation of wells for production of gas from coal beds
Номер патента: RU2735593C1. Автор: Виктор РУДОЛФ,Махшид ФИРУЗИ,Брент ГРИНВЕЙ. Владелец: Дзе Юниверсити Оф Квинсленд. Дата публикации: 2020-11-05.