Reducing permeability of highly permeable zones in oil and gas formations

Patent · Tue Sep 27 04:00:00 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
• Country of Publication: United States
• Language: English

Related Subjects

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