Wells – Processes – Placing fluid into the formation
Patent
1990-06-04
1991-02-26
Suchfield, George A.
Wells
Processes
Placing fluid into the formation
166309, E21B 43267
Patent
active
049954636
ABSTRACT:
Method for fracturing coal seams to improve the production (e.g. methane and/or water) therefrom. A water-based fracturing fluid is injected into the coal seam under pressure wherein the fracturing fluid contains both a wetting agent and a dispersant. The wetting agent contacts the fines which are formed during the fracturing of the coal and converts them from "hydrophobic" to "hydrophilic" while the dispersant serves to disperse and suspend the fines within the fracturing fluid. This prevents early screen-out of the fines from the fracturing fluid which allows the fluid to propagate fractures of longer lengths into a coal seam before the fines settle out to block further flow through a fracture.
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Jeffrey, R. G., et al., "Hydraulic Fracturing to Enhance Production of Methane from Coal Seams", Paper No. 8992, Proceedings of the 1989 Coalbed Methane Symposium, The University of Alabama/Tuscaloosa, Apr. 17-20, 1989.
Kramm Robert C.
Lane Robert H.
Atlantic Richfield Company
Faulconer Drude
Suchfield George A.
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