Oil recovery using stabilized saline heat-treated heteropolysaccharide solutions

Patent · Tue Jan 10 00:00:00 EST 1984

OSTI ID:6776314

Holzwarth, G M; Naslund, L A; Sandvik, E I

A process is disclosed for recovering crude oil from a subterranean formation using aqueous saline heteropolysaccharide solutions containing at least 0.5 wt. % of inorganic salts which are stabilized against viscosity loss on heat treatment. The stabilization process comprises preparing an aqueous solution containing heteropolysaccharide and inorganic salts, removing oxygen from the saline solution, heating to a temperature of at least 100/sup 0/ C. in an inert atmosphere, then removing cell debris. The solutions also have improved filter ability and are free of cell debris.

• Assignee: Exxon Research and Engineering Co.
• Patent Number(s): US 4425246
• OSTI ID: 6776314
• Resource Relation: Patent File Date: Filed date 18 Sep 1981; Other Information: PAT-APPL-303413
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
DISPLACEMENT FLUIDS
CHEMICAL COMPOSITION
OIL WELLS
FLUID INJECTION
POLYSACCHARIDES
PRODUCTION
AQUEOUS SOLUTIONS
BACTERIA
CALCIUM CHLORIDES
DISSOCIATION
ENHANCED RECOVERY
MEDIUM TEMPERATURE
OXYGEN
SALTS
SURFACTANTS
VISCOSITY
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM HALIDES
CARBOHYDRATES
CHLORIDES
CHLORINE COMPOUNDS
DISPERSIONS
ELEMENTS
FLUIDS
HALIDES
HALOGEN COMPOUNDS
MICROORGANISMS
MIXTURES
NONMETALS
ORGANIC COMPOUNDS
RECOVERY
SACCHARIDES
SOLUTIONS
WELLS
020300* - Petroleum- Drilling & Production