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US 8,997,862 B2Granted
Flooding operations employing chlorine dioxide
AssigneeSabre Intellectual Property Holdings LLC
InventorJohn Mason
Life of this patent
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Abstract
A method includes introducing a treatment fluid including a first polymer gel into a subterranean formation to generate a production fluid having an aqueous portion and a hydrocarbon portion, treating the aqueous portion of the production fluid with chlorine dioxide to separate additional hydrocarbons from the aqueous portion, and adjusting the viscosity of the treated aqueous portion prior to introducing the treated aqueous portion back into the subterranean formation.
Claims19
A method comprising:
- introducing a polymer gel-containing treatment fluid into a subterranean formation under conditions of a polymer flooding operation, the polymer gel-containing treatment fluid comprising:
- a water-soluble polymer;
- an amount of chlorine dioxide sufficient to increase the viscosity of the treatment fluid;
- and
- an aqueous base fluid.
2 more elements
A method comprising:
- introducing a treatment fluid into a subterranean formation under conditions of a polymer flooding operation, the treatment fluid comprising:
- a polymer gel comprising a water-soluble polymer;
- and
- an amount of chlorine dioxide substantially greater than needed for biocidal activity and also allowing an amount of water-soluble polymer to be used to form the polymer gel to be reduced by about 25% to about 75%, relative to a treatment fluid lacking chlorine dioxide;
- and
- an aqueous base fluid.
3 more elements
Dependencies are inferred from the claim text.