Reducing permeability of highly permeable zones in oil and gas formations

Patent · Tue Sep 27 00:00:00 EDT 1988

OSTI ID:6920719

Allison, J D

This patent describes a process for reducing flow into a thief zone penetrated by a water injection well bore which comprises injecting down the well bore and into the thief zone a mixture of an aqueous solution of a water soluble polyalkylenimine polymer and a cross-linking agent containing difunctional groups which are capable of delayed cross-linking with the polymer whereby delayed indepth gelling of the polymer takes place in the formation, the cross-linking agent being selected from the group consisting of difunctional aldehydes, ketones, alkyl halides, isocyanates, carboxylic acids and compounds having activated double bonds.

• Assignee: Conoco Inc., Ponca City, OK
• Patent Number(s): US 4773482
• OSTI ID: 6920719
• Resource Relation: Patent File Date: Filed date 1 Jun 1987
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
OIL WELLS
PLUGGING
PLUGGING AGENTS
CHEMICAL COMPOSITION
POLYMERS
ACTIVATION ENERGY
ALDEHYDES
ALKYL RADICALS
AQUEOUS SOLUTIONS
CARBOXYLIC ACIDS
CHEMICAL BONDS
CROSS-LINKING
DISPLACEMENT FLUIDS
GAS SATURATION
GELATION
HALIDES
ISOCYANATES
KETONES
OIL SATURATION
PERMEABILITY
RESERVOIR ROCK
WATERFLOODING
WELL STIMULATION
CHEMICAL REACTIONS
DISPERSIONS
ENERGY
FLUID INJECTION
FLUIDS
HALOGEN COMPOUNDS
MIXTURES
ORGANIC ACIDS
ORGANIC COMPOUNDS
POLYMERIZATION
RADICALS
SATURATION
SOLUTIONS
STIMULATION
WELLS
020300* - Petroleum- Drilling & Production