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U.S. Department of Energy
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Secondary recovery process

Patent ·
OSTI ID:5238530

Hydrocarbons are recovered from a subterranean hydrocarbon bearing formation penetrated by an injection well and a production well by displacing hydrocarbons toward the production well using a drive fluid such as water thickened with a terpolymer of acrylamide, acrylonitrile and acrylic acid or a terpolymer of acrylamide, acrylonitrile and acrylic acid alkoxylated with ethylene oxide. If desired, the drive fluid may be saturated with carbon dioxide and/or natural gas at the injection pressure.

Assignee:
Texaco Inc
Patent Number(s):
US 4323463
OSTI ID:
5238530
Country of Publication:
United States
Language:
English