Process for cleaning a subterranean injection surface and for selectively reducing the permeability of a subterranean formation

Patent · Tue Aug 10 00:00:00 EDT 1982

OSTI ID:7048583

Falk, D O; Norton, C J

A process is disclosed for selectively reducing the permeability of a subterranean formation penetrated by a well bore and having an injection surface plugged by crosslinked dry polymer. The process comprises the sequential injection of an aqueous solution containing an oxidizing agent, an aqueous spacer medium, and an aqueous solution having at least one dry polymer dissolved therein. Sequential injection of these aqueous solutions can be repeated to achieve the desired degree of injectivity and permeability reduction.

• Assignee: Marathon Oil Co
• Patent Number(s): US 4343363
• OSTI ID: 7048583
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ALKALI METAL COMPOUNDS
ANTIOXIDANTS
AQUEOUS SOLUTIONS
BOREHOLES
CARBOHYDRATES
CAVITIES
CHEMICAL REACTIONS
CLEANING
CROSS-LINKING
DISPERSIONS
FLUID INJECTION
INJECTION
INTAKE
MANGANESE COMPOUNDS
MIXTURES
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDIZERS
OXYGEN COMPOUNDS
PERMANGANATES
PERMEABILITY
PLUGGING
POLYAMIDES
POLYMERIZATION
POLYMERS
POLYSACCHARIDES
POTASSIUM COMPOUNDS
POTASSIUM PERMANGANATES
REDUCTION
SACCHARIDES
SODIUM COMPOUNDS
SOLUTIONS
SURFACE CLEANING
SURFACE FINISHING
TRANSITION ELEMENT COMPOUNDS
WELLS