creator Peru, Deborah A. 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 After flooding, an oil and water mixture is withdrawn from the well and the oil is separated from the oil and water mixture. Submitted by Aric Ahrens (ahrens@iit.edu) on 2011-12-06T19:15:54Z No. of bitstreams: 1 4817715.pdf: 410994 bytes, checksum: 8d7f66ed23b1cf8e65a6897af4aad35a (MD5) Made available in DSpace on 2011-12-06T19:15:54Z (GMT). No. of bitstreams: 1 4817715.pdf: 410994 bytes, checksum: 8d7f66ed23b1cf8e65a6897af4aad35a (MD5) Previous issue date: 1989-04-04 IIT Research Institute 2009-05-08 1989-04-04 4,817,715 http://hdl.handle.net/10560/2371 en United States Patent Patent reformatted digital application/pdf No Copyright - United States http://rightsstatements.org/page/NoC-US/1.0/ Open Access