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U.S. Department of Energy
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Secondary recovery process

Patent ·
OSTI ID:6857609
Hydrocarbons are recovered from a subterranean hydrocarbonbearing 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 copolymer of acrylamide and vinyl sulfonic acid or salts thereof alkoxylated with an alkylene oxide. Optionally, the drive fluid can be saturated with carbon dioxide and/or natural gas at the injection pressure.
Assignee:
Texaco Development Corp
Patent Number(s):
US 4228018
OSTI ID:
6857609
Country of Publication:
United States
Language:
English