Controlled rate acidization process

Details Controlled rate acidization process Controlled rate acidization process

1973-05-25

1976-07-13

Purser, Ernest R.

Wells

Processes

Specific propping feature

166307, 166308, E21B 4326

Patent

active

039688402

ABSTRACT:
A process is provided whereby a subterranean formation may be treated uniformly with acid at a controlled rate to a considerable distance from an injection point. The process includes an introduction of an acid which is solid but will slowly solubilize in water or brine in a subterranean formation. The introduction of the solid acid may take place via fracture fissures in the formation and also if desired in conjunction with a propping agent.

REFERENCES:
patent: 2766828 (1956-10-01), Rachford
patent: 2975834 (1961-03-01), West et al.
patent: 3417817 (1968-12-01), Moore
patent: 3441085 (1969-04-01), Gidley
patent: 3620305 (1971-11-01), Fulford
patent: 3634237 (1972-01-01), Crenshaw et al.
"New Fracture-Acid Method Looks Good", Oil & Gas Journal, June 1, 1959, p. 178.

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