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ENHANCED OIL RECOVERY IN LOW PERMEABILITY RESERVOIRS

  • US 20120125644A1
  • Filed: 11/24/2010
  • Published: 05/24/2012
  • Est. Priority Date: 11/24/2010
  • Status: Active Grant
First Claim
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1. A method for enhancing hydrocarbon recovery in low permeability reservoirs, the method comprising:

  • (a) providing a subterranean reservoir comprising one or more hydrocarbons and water therewithin;

    (b) providing a wellbore in fluid communication with the subterranean reservoir;

    (c) injecting carbon dioxide into the subterranean reservoir through the wellbore; and

    (d) injecting a substantially anhydrous composition into the subterranean reservoir through the wellbore, the substantially anhydrous composition comprising the carbon dioxide and one or more surfactants and being suitable to form a foam upon contact with water within the subterranean reservoir.

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