Method for acidizing high temperature subterranean formations

Details Method for acidizing high temperature subterranean formations Method for acidizing high temperature subterranean formations

E - Fixed Constructions

21

B

31/13

E21B 43/27 (2006.01) C09K 8/62 (2006.01) C09K 8/72 (2006.01)

Patent

CA 1109659

"Abstract of the Disclosure" Subterranean formations having temperatures between about 250° F. and about 700° F. are acidized by introducing a substantially anhydrous acid precursor through a well and into the formation, wherein the precursor hydrolyzes in situ to generate a hydrohalic acid. The acid precursor is a normally liquid, halogenated hydrocarbon having one or two carbon atoms per molecule which is thermally stable under the high tempera- ture and pressure conditions encountered prior to hydrolysis.

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