Phosphate ester oil gellant

Details Phosphate ester oil gellant Phosphate ester oil gellant

C - Chemistry, Metallurgy

09

K

C09K 8/64 (2006.01) E21B 43/26 (2006.01)

Patent

CA 2722868

A composition and method of fracturing a subterranean formation. The composition includes: about 0.25 wt. % to about 3,0 wt. %, based on a weight of the hydrocarbon liquid, of a mixture of phosphate esters, said esters selected from the group consisting of: monoester PO(OR1)(OH)2, POOR2)(OH2); diester PO(OH)(OR1)(OR2)2-m where in = 0, 1, or 2; triester PO(OH)(OR1)n(OR1)(OR2)3-n where n = 0, 1, 2 or 3; and phosphoric acid H3PO4 wherein R1 and R2 each have 2 to 18 carbon atoms; and about. 0.2 wt. % to about 1.0 wt. %, based on the weight of the hydrocarbon liquid, of an acidic polynuclear aluminum compound having an Al:Cl mole ratio ranging from about 1.40:1 to about 2.2:1. The composition is added to a hydrocarbon liquid to fracture the subterranean formation with this hydrocarbon liquid. The hydrocarbon liquid containing the composition exhibits a substantially constant viscosity.

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