Aqueous flooding methods for tertiary oil recovery

Patent · Sun Jan 01 00:00:00 EST 1989

OSTI ID:866900

Peru, Deborah A ^[1]

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1. Bartlesville, OK

A method of aqueous flooding of subterranean oil bearing formation for tertiary oil recovery involves injecting through a well into the formation a low alkaline pH aqueous sodium bicarbonate flooding solution. The flooding solution's pH ranges from about 8.25 to 9.25 and comprises from 0.25 to 5 weight percent and preferably about 0.75 to 3.0 weight percent of sodium bicarbonate and includes a petroleum recovery surfactant of 0.05 to 1.0 weight percent and between 1 and 20 weight percent of sodium chloride. After flooding, an oil and water mixture is withdrawn from the well and the oil is separated from the oil and water mixture.

• Research Organization: IIT Research Institute (Chicago, IL)
• DOE Contract Number: FC22-83FE60149
• Assignee: IIT Research Institute (Chicago, IL)
• Patent Number(s): US 4817715
• OSTI ID: 866900
• Country of Publication: United States
• Language: English

Related Subjects

aqueous
flooding
methods
tertiary
oil
recovery
method
subterranean
bearing
formation
involves
injecting
alkaline
ph
sodium
bicarbonate
solution
ranges
25
comprises
weight
percent
preferably
75
petroleum
surfactant
05
20
chloride
water
mixture
withdrawn
separated
ph range
oil bearing
sodium bicarbonate
tertiary oil
water mixture
sodium chloride
oil recovery
weight percent
subterranean oil
aqueous sodium
bearing formation
ph aqueous
petroleum recovery
alkaline ph
aqueous flooding
involves injecting
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