Method for breaking fracturing fluids

Details Method for breaking fracturing fluids Method for breaking fracturing fluids

2008-08-28

2010-12-28

Suchfield, George (Department: 3676)

Wells

Processes

With indicating, testing, measuring or locating

C166S053000, C166S064000, C166S250010, C166S250100, C166S300000, C166S308200, C166S308300

Reexamination Certificate

active

07857048

ABSTRACT:
A method for breaking a fracturing fluid includes identifying application parameter(s) including a subterranean formation temperature, and determining an acid precursor concentration in response to the application parameter(s). The method further includes providing a treatment fluid including a carrier fluid, a metallic peroxide breaker, and an amount of an acid precursor according to the acid precursor concentration, and treating the subterranean formation with the treatment fluid. The application parameter(s) may further include a flowback wait time, a composition of the metallic peroxide breaker, a gel loading of the carrier fluid, and/or a permeability of the subterranean formation. The metallic peroxide breaker may include an alkaline peroxide and/or a zinc peroxide. The acid precursor may include polylactic acid and/or polyglycolic acid.

REFERENCES:
patent: 5253711 (1993-10-01), Mondshine
patent: 5624886 (1997-04-01), Dawson et al.
patent: 6613720 (2003-09-01), Feraud et al.
patent: 6763888 (2004-07-01), Harris et al.
patent: 6983801 (2006-01-01), Dawson et al.
patent: 7036590 (2006-05-01), Harris et al.

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