Composition for selectively reducing subterranean formation permeability

Patent · Tue Jun 30 00:00:00 EDT 1992

OSTI ID:7272182

Hutchins, R D; Dovan, H T

This patent describes a process for selectively reducing the water permeability of a hydrocarbon-containing subterranean formation. It comprises contacting an inorganic crosslinking agent with an aqueous solution comprising at least some cationic polyacrylamide to form a composition; injecting the composition into at least a portion of the subterranean formation, wherein the composition forms a visible gel in at least a portion of the subterranean formation. This paper also describes a process for selectively reducing the water permeability of a hydrocarbon-containing subterranean formation. It comprises contacting an inorganic crosslinking agent selected from the group consisting of stainless steel and boron with an aqueous solution comprising at least some polyacrylamide to form a composition, injecting the composition into at least a portion of the subterranean formation, wherein the composition forms a visible gel in at least a portion of the subterranean formation.

• Assignee: Union Oil Co. of California, Los Angeles, CA (United States)
• Patent Number(s): US 5125456; A
• Application Number: PPN: US 7-676261
• OSTI ID: 7272182
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
ACRYLAMIDE
ALKALI METAL COMPOUNDS
ALLOYS
AMIDES
AQUEOUS SOLUTIONS
BORON
CATIONS
CHARGED PARTICLES
CHEMICAL COMPOSITION
CHLORIDES
CHLORINE COMPOUNDS
COLLOIDS
DISPERSIONS
ELEMENTS
FLUID INJECTION
GELS
HALIDES
HALOGEN COMPOUNDS
HIGH ALLOY STEELS
HYDROCARBONS
HYDROGEN COMPOUNDS
IONS
IRON ALLOYS
IRON BASE ALLOYS
MIXTURES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PERMEABILITY
POLYMERS
POTASSIUM CHLORIDES
POTASSIUM COMPOUNDS
SEMIMETALS
SOLUTIONS
STAINLESS STEELS
STEELS
VISCOSITY
WATER