Earth boring – well treating – and oil field chemistry – Well treating – Contains organic component
Patent
1995-03-13
1999-02-09
Kelly, C. H.
Earth boring, well treating, and oil field chemistry
Well treating
Contains organic component
507217, 507922, 435209, E21B 4326
Patent
active
058694358
ABSTRACT:
A method of fracturing a subterranean formation which surrounds a well bore comprises the steps of providing a fracturing fluid, and injecting the fracturing fluid into the well bore at a pressure sufficient to form fractures in the subterranean formation which surrounds the well bore. The pressure is then released from the fracturing fluid, after which the fluid may be removed from the well and the well placed into production. The fracturing fluid comprises an aqueous liquid, a polysaccharide soluble or dispersible in the aqueous liquid in an amount sufficient to increase the viscosity of the aqueous liquid, an enzyme breaker which degrades said polysaccharide at a temperature above 180.degree. F. Fracturing fluid compositions and enzyme breaker systems useful for carrying out the invention are also disclosed.
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Kelly Robert M.
Khan Saad A.
Leduc Pascal
Prud'homme Robert K.
Tayal Akash
Kelly C. H.
North Carolina State University
The Trustees of Princeton University
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