Method of treating a well using fluoboric acid to clean a...

Details Method of treating a well using fluoboric acid to clean a... Method of treating a well using fluoboric acid to clean a...

E - Fixed Constructions

21

B

166/25

E21B 43/27 (2006.01) C09K 8/74 (2006.01) E21B 43/267 (2006.01)

Patent

CA 1085716

ABSTRACT OF THE DISCLOSURE The permeability of the prop pack in a subterranean fracture containing a propping agent is improved by contacting the propping agent with fluoboric acid. The fluoboric acid slowly forms hydrolysis products, including hydrofluroic acid and hydroxyfluoboric acid, which react with and stabilize clays and other fines in the prop pack, thereby improving its permeability. Because the fluoboric acid hydrolyzes slowly, it can be in- jected deep into the fracture extremities before significant spending of the acid occurs.

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