Gels for profile control in enhanced oil recovery under harsh conditions

Patent · Tue Nov 15 04:00:00 EST 1988

OSTI ID:6775492

Hoskin, D H; Mitchell, T O; Shu, P

This patent describes an aqueous cross-linked gel formed by partially hydrolyzing an aqueous solution of a terpolymer comprising: (i) 5 to 95% by weight of 2-acrylamido-2-methylpropane-3-sulfonate; (ii) 5 to 95% by weight of N-vinyl-N-methyl acetamide; (iii) 0 to 80% by weight of acrylamide where the terpolymer is refluxed with an alkali metal hydroxide in an amount of from about 0.5 to about 5.0% by weight for about 7 to about 16 hours at a temperature of about 100/sup 0/C thereby forming a polymer intermediate which can be gelled to form a gel of a size sufficient for profile control.

• Assignee: Mobil Oil Corp., New York, NY
• Patent Number(s): US 4785028
• OSTI ID: 6775492
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ALKALI METAL COMPOUNDS
ALKANES
ALKYL RADICALS
AQUEOUS SOLUTIONS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COLLOIDS
CROSS-LINKING
DISPERSIONS
DISPLACEMENT FLUIDS
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUELS
GELS
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXIDES
METHYL RADICALS
MIXTURES
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXYGEN COMPOUNDS
PETROLEUM
POLYMERIZATION
POLYMERS
PROPANE
RADICALS
RECOVERY
SOLUTIONS
STIMULATION
SULFONATES
VINYL RADICALS
WATERFLOODING
WELL STIMULATION
WELLS