Secondary recovery process utilizing water saturated with gas Patent #: 4110224
ApplicationNo. 05/917051 filed on 06/19/1978
US Classes:507/225, Nitrogen is attached directly or indirectly to the acrylic acid monomer or derivative by nonionic bonding (e.g., acrylamide, acrylonitrile, etc.)166/275, Injected fluid comprises water and material other than inorganic gas507/254, The sulfur is part of a sulfate group507/259, The sulfur is part of a sulfonate group507/936, Flooding the formation526/287From monomer containing three or more oxygen atoms bonded to a single sulfur atom, e.g., sulfonate, etc.
ExaminersPrimary: Guynn, Herbert B.
Attorney, Agent or Firm
International ClassesC09K 8/588 (20060101)
C09K 8/58 (20060101)
AbstractHydrocarbons 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 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.