Crosslinked polyvinyl amine copolymer gels for use under harsh reservoir conditions

Patent · Tue Oct 23 04:00:00 EDT 1990

OSTI ID:6410722

Shu, P

This patent describes a process for recovering oil from a subterranean oil-bearing formation having relatively high permeability zones and relatively low permeability zones penetrated by an injection well and at least one production well in fluid communication with a substantial portion of the formation. It comprises: injecting into the relatively high permeability zones of the formation via the injection well an aqueous gel-forming composition comprising water, a viscosifying amount of a water-dispersible polyvinyl amine copolymer; and a crosslinking agent which is a mixture of a phenolic component and an aldehyde, the crosslinking agent present in an amount effective to cause gelation to the polyvinyl amine copolymer; injecting a flooding fluid into the formation via the injection well that preferentially enters the low permeability zones; and recovering fluids including oil from the formation via the production well.

• Assignee: Mobil Oil Corp., Fairfax, VA (USA)
• Patent Number(s): US 4964463; A
• Application Number: PPN: US s 7-422199
• OSTI ID: 6410722
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
AMINES
CHEMICAL COMPOSITION
COLLOIDS
COPOLYMERS
DISPERSIONS
DRILLING FLUIDS
ENERGY SOURCES
ENHANCED RECOVERY
FLUIDS
FOSSIL FUELS
FUELS
GELS
INJECTION WELLS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PERMEABILITY
PETROLEUM
POLYMERS
RECOVERY
STIMULATION
SWEEP EFFICIENCY
TECHNOLOGY ASSESSMENT
WELL STIMULATION
WELLS