Method of preventing incompatibility between aqueous well treati

Details Method of preventing incompatibility between aqueous well treati Method of preventing incompatibility between aqueous well treati

1996-12-09

1998-06-09

Suchfield, George A.

Wells

Processes

Material placed in pores of formation to treat resident...

166307, 166308, 252332, 507255, 507259, 507265, 507266, 507923, E21B 3706, E21B 4322, E21B 4326, E21B 4327

Patent

active

057621381

ABSTRACT:
The present invention provides microemulsion surfactant additives for use in aqueous well treating fluids to prevent the formation of stable emulsions and sludge when the aqueous treating fluids contact hydrocarbons. The additives are basically comprised of a solvent, a co-solvent, water, an aqueous liquid-hydrocarbon liquid de-emulsifying surfactant and a liquid hydrocarbon antisludging surfactant. Aqueous compositions including the additives and methods of treating subterranean formations or zones containing hydrocarbons using the compositions are also provided.

REFERENCES:
patent: 2110847 (1938-03-01), DeGroote
patent: 2178830 (1939-11-01), Bruson
patent: 3481870 (1969-12-01), Cheng et al.
patent: 4073344 (1978-02-01), Hall
patent: 4823874 (1989-04-01), Ford
patent: 5008026 (1991-04-01), Gardner et al.
patent: 5445221 (1995-08-01), Vinson
patent: 5543387 (1996-08-01), Mokadam et al.

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