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

Patent · Tue Apr 22 00:00:00 EST 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
• Resource Relation: Patent File Date: 12 Jun 1985
• Country of Publication: United States
• Language: English

Related Subjects

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