Method and materials for hydraulic fracturing of wells
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United States of America Patent
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Sep 27, 2005
Grant Date -
Mar 27, 2003
app pub date -
Sep 24, 2002
filing date -
Sep 26, 2001
priority date (Note) -
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Abstract
Hydraulic fracturing of wells by injecting a degradable polymer phase as a fracturing fluid is provided. Composition and degree of polymerization of the degradable polymer and the selection of additives may be varied to adjust the viscosity, degradation time and other properties of the fracturing fluid. Viscous degradable fluid or pellets of degradable polymer may be placed in a wellbore as an internal phase in a low viscosity carrier fluid. A polymer-continuous liquid phase may be formed at a selected location in the wellbore, usually near perforations, before the polymer phase is pressured into a formation to form a hydraulic fracture.
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