Method of acidizing wells using gelled acids

Details Method of acidizing wells using gelled acids Method of acidizing wells using gelled acids

1981-10-13

1984-01-17

Guynn, Herbert B.

Compositions

Leather or fur treating

166307, 2523635, E21B 4327

Patent

active

044262965

ABSTRACT:
The permeability of siliceous or calcareous subterranean formations adjacent a wellbore is increased by contacting the formation with a gelled aqueous acid capable of dissolving mineral constituents in the formation. The gelled aqueous acid compositions comprise (a) aqueous hydrochloric acid, and (b) a readily soluble gelling agent. Component (b) contains a sufficient amount of a polyoxyethylene glycol to gel the acid and enough ammonium-, alkali-, or alkaline earth metal bicarbonate or carbonate to cause rapid dissolution and dispersion of the polyoxyethylene glycol in the aqueous hydrochloric acid.

REFERENCES:
patent: 3018826 (1962-01-01), Sandiford
patent: 3142335 (1964-07-01), Dill
patent: 3428558 (1969-02-01), Murphy
patent: 4167214 (1979-09-01), Street
patent: 4240505 (1980-12-01), Swanson
The Condensed Chemical Dictionary, Ninth Edition, 1977, pp. 77 and 346.
Polox, Water Soluble Resins are Unique, Publication by Union Carbide Corp., 3/81.
Stratta, "Polyox Poly(ethylene Oxide) Resins, The Thickening of Acids and Other Cleaning Formulations," Technology Series No. 45-T-5. Pub. by Union Carbide, 3/70.

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