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U.S. Department of Energy
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Secondary recovery process

Patent ·
OSTI ID:6571036

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 (A) vinyl sulfonic acid alkoxylated with ethylene oxide or a mixture of ethylene oxide and propylene oxide and (B) acrylamide. 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 4228019
OSTI ID:
6571036
Country of Publication:
United States
Language:
English