Low temperature degradation of galactomannans

Details Low temperature degradation of galactomannans Low temperature degradation of galactomannans

1991-01-14

1991-11-26

Novosad, Stephen J.

Wells

Processes

Placing fluid into the formation

252 8551, E21B 4326

Patent

active

050675664

ABSTRACT:
A method is shown for fracturing a subterranean formation in which a hydratable polymer, crosslinking agent and breaker are combined to form a gelled fracturing fluid. The pH of the fracturing fluid is initially raised above and 9.0 to deactivate the breaker. A pH regulating substance is added to the fracturing fluid which slowly hydrolyzes to produce an acid, thereby dropping the breaker to produce a controlled break of the polymer gel.

REFERENCES:
patent: 3163219 (1964-12-01), Wyant et al.
patent: 3766984 (1973-10-01), Nimerick
patent: 3922173 (1975-11-01), Misak
patent: 3960736 (1976-06-01), Free et al.
patent: 3974077 (1976-08-01), Free
patent: 4202795 (1980-05-01), Burnham et al.
patent: 4250044 (1981-02-01), Hinkel
patent: 4506734 (1985-03-01), Nolte
patent: 4683068 (1987-07-01), Kucera
patent: 4750562 (1988-06-01), Jennings, Jr.

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