Enhanced oil recovery composition

Patent · Tue Jan 03 04:00:00 EST 1989

OSTI ID:6192379

Hsieh, W C

This patent describes a viscous polymer solution comprising: water; at least one polymer comprising from about 45 to about 65 weight percent ethylacrylate monomer residue, from about 10 to about 45 weight percent methylacrylic acid residue, and from about 10 to about 30 weight percent acrylic acid monomer residue; from about 2 to about 10 parts per 100 part of monomer of a co-surfactant system comprising: (a) at least one nonylphenol polyethylene oxide ether sulfate, wherein the polyethylene oxide adduct of the nonylphenol polyethylene oxide ether sulfate is comprised of at least about 20 moles of ethylene oxide monomer residue; and (b) at least one propoxylated, ethoxylated propylene glycol nonionic surfactant block polymer, wherein the ratio of the ether sulfate to the block polymer is from about 1:2 to about 10:1.

• Assignee: Union Oil Co. of California, Los Angeles, CA
• Patent Number(s): US 4795772
• OSTI ID: 6192379
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ACRYLATES
ACRYLIC ACID
ALCOHOLS
ALKENES
ALKYL RADICALS
AROMATICS
CARBOXYLIC ACID SALTS
CARBOXYLIC ACIDS
CHEMICAL COMPOSITION
DISPLACEMENT FLUIDS
ENERGY SOURCES
ENHANCED RECOVERY
ETHERS
ETHYL RADICALS
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUELS
GLYCOLS
HYDROCARBONS
HYDROXY COMPOUNDS
METHYL RADICALS
MICROEMULSION FLOODING
MISCIBLE-PHASE DISPLACEMENT
MONOCARBOXYLIC ACIDS
MONOMERS
OIL WELLS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PETROLEUM
PHENOLS
POLYETHYLENE GLYCOLS
POLYMERS
PROPYLENE
RADICALS
RECOVERY
STIMULATION
SULFATES
SULFUR COMPOUNDS
WELL STIMULATION
WELLS