Block copolymers useful for enhanced oil recovery processes

Patent · Tue Oct 03 04:00:00 EDT 1989

OSTI ID:7014620

Shu, P

This patent describes a method for permeability control of a subterranean formation and for enhancing oil recovery from the subterranean formation. The method comprising injecting into the subterranean formation an aqueous solution comprised of a block copolymer having the structural form of ABA triblock or (AB){sub n} multiblock wherein A is a crosslinkable polymer, B is a non-crosslinkable polymer or a polymer having low reactivity to crosslinking agents, n is a number of at least 2 and a crosslinking agent. Wherein A is selected from the group consisting of polyacrylic acid, partially hydrolyzed polyacrylamide, highly hydrolyzed polyacrylamide, partially hydrolyzed polyacrylic ester, highly hydrolyzed polyacrylic ester, polyvinyl alcohol and mixtures thereof and B is selected from the group consisting of polyacrylamide, partially hydrolyzed polyacrylamide, polyalkylene ethers, polyvinyl alcohol and polyvinylpyridine.

• Assignee: Mobil Oil Corp., New York, NY
• Patent Number(s): US 4871021
• OSTI ID: 7014620
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ALCOHOLS
AMIDES
AQUEOUS SOLUTIONS
AZINES
CHEMICAL COMPOSITION
COPOLYMERS
DISPERSIONS
DISPLACEMENT FLUIDS
ENHANCED RECOVERY
ESTERS
ETHERS
FLUID INJECTION
FLUIDS
HETEROCYCLIC COMPOUNDS
HYDROXY COMPOUNDS
MIXTURES
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
POLYACRYLATES
POLYMERS
POLYVINYLS
PYRIDINE
PYRIDINES
RECOVERY
SOLUTIONS
STIMULATION
WATERFLOODING
WELL STIMULATION
WELLS