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Method and compositions for reducing the permeabilities of subterranean zones

  • US 6,196,317 B1
  • Filed: 12/15/1998
  • Issued: 03/06/2001
  • Est. Priority Date: 12/15/1998
  • Status: Expired due to Term
First Claim
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1. A method of reducing the permeability of a subterranean zone comprising the steps of:

  • (a) introducing an aqueous composition comprised of water, a chelated organic gelling agent comprised of a metal ion chelated water soluble polyalkylene imine and a water soluble polymer capable of being cross-linked by said gelling agent into said zone; and

    then (b) allowing said aqueous composition to form a cross-linked gel in said zone.

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