Calcium-tolerant N-substituted acrylamides as thickeners for aqueous systems

Patent · 21 April 1986

OSTI ID:7159139

McCormick, C L; Blackmon, K P

A water-soluble ionically-charged random copolymer of acrylamide and an alkaline or alkali metal 3-acrylamido-3-methylbutanoate having an average molecular weight of greater than about 50,000 has been found to maintain unusually stable and effective viscosities in the presence of salts such as NaCl and CaCl[sub 2] when added to water in minor amounts, thus making it a highly effective mobility control agent for secondary and tertiary oil recovery methods. Also within the scope of the invention are terpolymers which additionally contain olefinically unsaturated monomers such as acrylic acid or sodium acrylate.

• Research Organization: University of Southern Mississippi
• DOE Contract Number: AS19-80BC10321
• Assignee: Univ. of Southern Mississippi, Hattiesburg, MS (United States)
• Patent Number(s): US 4584358; A
• Application Number: PPN: US 6-743857
• OSTI ID: 7159139
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ACRYLAMIDE
ADDITIVES
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
AMIDES
CALCIUM CHLORIDES
CALCIUM COMPOUNDS
CALCIUM HALIDES
CHLORIDES
CHLORINE COMPOUNDS
COPOLYMERS
DISPLACEMENT FLUIDS
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUELS
HALIDES
HALOGEN COMPOUNDS
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
PETROLEUM
POLYMERS
SODIUM CHLORIDES
SODIUM COMPOUNDS
VISCOSITY
WATERFLOODING
WELLS