Aqueous flooding methods for tertiary oil recovery

Patent · Tue Apr 04 04:00:00 EDT 1989

OSTI ID:5922436

Peru, D A

A method is described for flooding of a subterranean petroleum bearing formation for tertiary oil recovery, comprising the steps of providing at least one production well having at least one inlet within the subterranean petroleum bearing formation, and at least one injection well having at least one outlet within the subterranean petroleum bearing formation, injecting into the petroleum bearing formation through the injection well, a low alkaline pH aqueous sodium bicarbonate flooding solution having a pH in the range of from about 8.25 to about 9.25 comprising from about 0.25 to about 5 weight percent of sodium bicarbonate, from about 0.05 to about 1.0 weight percent of petroleum recovery surfactant, and from about 1 to about 20 weight percent of sodium chloride, based on the total weight of the aqueous flooding solution, withdrawing through at least one inlet of the production wells, an oil and water mixture comprising petroleum from the subterranean petroleum bearing formation and at least a portion of the low alkaline pH sodium bicarbonate aqueous flooding solution, and separating the oil from the aqueous oil and water mixture.

• Assignee: IIT Research Institute, Chicago, IL
• Patent Number(s): US 4817715
• OSTI ID: 5922436
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ACID CARBONATES
ACIDIZATION
ALKALI METAL COMPOUNDS
AQUEOUS SOLUTIONS
CARBON COMPOUNDS
CARBONATES
CAUSTIC FLOODING
CHEMICAL COMPOSITION
CHLORIDES
CHLORINE COMPOUNDS
DISPERSIONS
DISPLACEMENT FLUIDS
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUELS
HALIDES
HALOGEN COMPOUNDS
MIXTURES
OIL WELLS
OXYGEN COMPOUNDS
PETROLEUM
RECOVERY
SODIUM CARBONATES
SODIUM CHLORIDES
SODIUM COMPOUNDS
SOLUTIONS
STIMULATION
WATERFLOODING
WELL STIMULATION
WELLS