Subterranean formation treating with dual delayed crosslinking g

Details Subterranean formation treating with dual delayed crosslinking g Subterranean formation treating with dual delayed crosslinking g

1992-10-30

1993-12-21

Suchfield, George A.

Wells

Processes

Chemical inter-reaction of two or more introduced materials

166308, E21B 4326

Patent

active

052714667

ABSTRACT:
A method of treating a subterranean formation utilizing a first acidic crosslinked aqueous gel followed by a second alkaline crosslinked aqueous gel having a different crosslinking agent. The first fluid assists in breaking the viscosity of the second fluid upon completion of the treatment. The first fluid may contain a gasifiable fluid which will provide a gas assist to the return of the first and second fluids upon completion of the treatment.

REFERENCES:
patent: Re32302 (1986-12-01), Almond et al.
patent: 4488975 (1984-12-01), Almond
patent: 4619776 (1986-10-01), Mondshine
patent: 5141655 (1992-08-01), Hen

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