Enhanced oil recovery profile control with crosslinked anionic acrylamide copolymer gels

Patent · Tue Jan 07 04:00:00 EST 1992

OSTI ID:5594484

Mitchell, T O

This patent describes an aqueous crosslinked acrylamide copolymer gel formed in the absence of a partial hydrolysis step. It comprises water; a viscosifying amount of anionic acrylamide copolymer of high weight-average molecular weight produced by copolymerizing an aqueous mixture of monomers comprising about 5 to 95 weight percent of 2-acrylamido-2-methylpropanesulfonic acid; about 2 to 95 weight percent of N-vinyl-N-methyl acetamide; and about 5 to 93 weight percent of acrylamide, the copolymer having a weight-average molecular weight of at least 5 {times} 10{sup 6} and able to form a stable crosslinked gel without first subjecting the copolymer to a partial hydrolysis step; a crosslinking agent selected from the group consisting of transition metal ions, phenolic resins and amino resins wherein the crosslinking agent is present in an amount sufficient to cause gelation of the aqueous solution of the anionic acrylamide copolymer of high weight-average molecular weight and produce the crosslinked gel.

• Assignee: Mobil Oil Corp., Fairfax, VA (United States)
• Patent Number(s): A; US 5079278
• Application Number: PPN: US 7-595721
• OSTI ID: 5594484
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
040400* -- Oil Shales & Tar Sands-- Oil Production
Recovery
& Refining
ACRYLAMIDE
AMIDES
ANIONS
AQUEOUS SOLUTIONS
AUGMENTATION
CHARGED PARTICLES
CHEMICAL REACTIONS
COLLOIDS
COPOLYMERS
DISPERSIONS
GELS
IONS
MIXTURES
MOLECULAR WEIGHT
MONOMERS
OIL YIELDS
OPTIMIZATION
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
POLYMERIZATION
POLYMERS
SOLUTIONS
USES
YIELDS