Low viscosity acid-in-oil emulsions and methods

Details Low viscosity acid-in-oil emulsions and methods Low viscosity acid-in-oil emulsions and methods

1992-11-06

1994-10-18

Suchfield, George A.

Wells

Processes

Placing fluid into the formation

252 8553, E21B 4327

Patent

active

053559584

ABSTRACT:
The present invention provides low viscosity acid-in-oil emulsions, surfactant systems and methods of using the emulsions and surfactants for stimulating the production of hydrocarbons from subterranean producing formations. The low viscosity acid-in-oil emulsions are basically comprised of a hydrocarbon oil forming the external phase of the emulsion, an emulsifying agent of a type which forms and stabilizes an acid-in-oil emulsion, an emulsion viscosity reducing agent comprising a fatty ammonium salt of a fatty acid and an aqueous acid solution forming the internal phase of the emulsion.

REFERENCES:
patent: 2681889 (1954-06-01), Menaul et al.
patent: 3343602 (1967-09-01), Knox et al.
patent: 4140640 (1979-02-01), Scherubel
patent: 5034140 (1991-07-01), Gardner et al.

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