Method for emplacement of a gelatinous foam in gas flooding enhanced recovery

Patent · Tue Sep 22 04:00:00 EDT 1987

OSTI ID:6054382

Hutchins, R D; Dovan, H T

This patent describes a method for reducing the permeability of the higher permeability zones of a subterranean reservoir having heterogeneous permeability and being penetrated by at least one well. The method comprises: (1) injecting through a well and into a subterranean reservoir: (a) an aqueous liquid solution comprising: (1) a water-soluble or water-dispersible polymer; (2) a crosslinking agent for the polymer capable of reacting with the polymer to produce a gel; (3) a source of hydroxyl ions in an amount sufficient to retard the reaction of the polymer with the crosslinking agent; (4) a water soluble surface active agent; (b) a foam emplacement gas comprising an acid gas; and (c) allowing a gelatinous stable foam having stiffened foam films of crosslinked polymer to form in the higher permeability zones.

• Assignee: Union Oil Co. of California, Los Angeles, CA
• Patent Number(s): US 4694906
• OSTI ID: 6054382
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
AQUEOUS SOLUTIONS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COLLOIDS
CROSS-LINKING
DISPERSIONS
DISPLACEMENT FLUIDS
ENERGY SOURCES
ENGINEERING
ENHANCED RECOVERY
FLUID INJECTION
FLUIDS
FOAMS
FOSSIL FUELS
FUELS
GAS INJECTION
GAS SATURATION
GELATION
GELS
HETEROGENEOUS EFFECTS
HYDROXYL RADICALS
MIXTURES
OIL WELLS
PERMEABILITY
PETROLEUM
POLYMERIZATION
POLYMERS
RADICALS
RECOVERY
RESERVOIR ENGINEERING
RESERVOIR ROCK
SATURATION
SOLUTIONS
SOLVENT PROPERTIES
STABILIZATION
STIMULATION
SURFACTANTS
WATERFLOODING
WELL STIMULATION
WELLS