E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
31/16
E21B 43/00 (2006.01) C09K 8/60 (2006.01) E21B 43/26 (2006.01) E21F 7/00 (2006.01)
Patent
CA 2037454
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. - 21 -
Hinkel Jerald John
Nimerick Kenneth
Dowell Schlumberger Canada Inc.
Smart & Biggar
LandOfFree
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