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Use of materials as waterflood additives

  • US 3,946,812 A
  • Filed: 03/12/1975
  • Issued: 03/30/1976
  • Est. Priority Date: 01/02/1974
  • Status: Expired due to Term
First Claim
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1. In a method of recovering crude oil from a subterranean formation by a waterflooding process, the improvement wherein the waterflood is preceded by injection into said formation of a slug of a transparent, aqueous solution of a water-soluble, sulfated, polyethoxylated alcohol, said aqueous solution being substantially free of any other thickening agent and any other surface active agent.

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