Method of treating subterranean formations using a non-damaging fracturing fluid

Patent · Tue Apr 16 04:00:00 EDT 1991

OSTI ID:5116525

Williams, D A; Horton, R L; Newlove, J C; Chumley, R E

This patent describes improvement in a process for fracturing a subterranean formation wherein an aqueous fracturing fluid is injected through a well and into the formation at a pressure and rate sufficient to form a fracture therein. The improvement includes an effective amount of a copolymer of acrylamide and potassium acrylate crosslinked with a titanium or zirconium compound, the acrylamide comprises from 60 to 78 mol % of the copolymer and the potassium acrylate comprises 22 to 40 mol % of the copolymer and the concentration of the crosslinked copolymer being sufficient to provide the aqueous fracturing fluid with a viscosity of between 20 cp and 1,000 cp at 170 sec at a temperature of at least 200{degrees}F; and an effective amount of an oxidative gel breaker capable of degrading the copolymer after about 2 hours.

• Assignee: Exxon Chemical Patents, Inc., Linden, NJ (USA)
• Patent Number(s): A; US 5007481
• Application Number: PPN: US 7-473863
• OSTI ID: 5116525
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
AQUEOUS SOLUTIONS
CHEMICAL COMPOSITION
COMMINUTION
COPOLYMERS
DISPERSIONS
ENHANCED RECOVERY
FLUIDS
FRACTURING
FRACTURING FLUIDS
HYDRAULIC FRACTURING
MIXTURES
NATURAL GAS WELLS
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERS
RECOVERY
ROCK-FLUID INTERACTIONS
SOLUTIONS
STIMULATION
WELL STIMULATION
WELLS