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

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

1978-07-21

1979-07-10

Novosad, Stephen J.

Wells

Processes

Placing fluid into the formation

166280, 252 855C, E21B 4327

Patent

active

041604830

ABSTRACT:
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 hydrofluoric 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 injected deep into the fracture extremities before significant spending of the acid occurs.

REFERENCES:
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patent: 2664165 (1953-12-01), Bond
patent: 2717876 (1955-09-01), Menaul
patent: 2785752 (1957-03-01), Bond et al.
patent: 3481401 (1969-12-01), Graham
patent: 3842911 (1974-10-01), Knox et al.
patent: 3891566 (1975-06-01), Crowe
patent: 4028257 (1977-06-01), Thompson

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