Method for oil recovery using a polymer containing fluid

Patent · Tue Oct 22 04:00:00 EDT 1985

OSTI ID:5865837

Stipanovic, A J

A process for recovering hydrocarbons from a subterranean hydrocarbon bearing formation penetrated by injection well and a production well includes the steps of injecting into the formation via an injection well an aqueous drive fluid comprising water and more than about 200 parts per million of Beta-(1..-->..6)-D-glucan having an average molecular weight of more than about 2 x 10/sup 4/ and comprising recurring units of the disaccharide gentiobiose, forcing said aqueous drive fluid through the formation and recovering hydrocarbons from the production well. The process also includes using a more concentrated solution of the glucan, more than about 2,000 parts per million, as a vertical conformance agent. The invention also includes a concentrate of the glucan in dimethylsulfoxide or in a 4 molar or higher concentration of aqueous urea which is diluted to form the aqueous drive fluid.

• Assignee: Texaco, Inc.
• Patent Number(s): US 4548268
• OSTI ID: 5865837
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ADDITIVES
AQUEOUS SOLUTIONS
CARBOHYDRATES
CHEMICAL COMPOSITION
DISPERSIONS
DISPLACEMENT FLUIDS
DMSO
ENHANCED RECOVERY
FLUID INJECTION
FLUIDS
INJECTION
INTAKE
MICROEMULSION FLOODING
MISCIBLE-PHASE DISPLACEMENT
MIXTURES
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
POLYMERS
RECOVERY
SACCHARIDES
SOLUTIONS
SULFOXIDES
SWEEP EFFICIENCY
TEMPERATURE EFFECTS
WATERFLOODING
WELLS