Polyvalent metal ion chelating agents for xanthan solutions

Details Polyvalent metal ion chelating agents for xanthan solutions Polyvalent metal ion chelating agents for xanthan solutions

1981-08-20

1984-08-21

Lechert, Jr., Stephen J.

Compositions

Leather or fur treating

166246, C09K 300

Patent

active

044668899

ABSTRACT:
A stable xanthan solution with superior filterability and subterranean injectivity characteristics comprising biopolymer and a chelating agent selected from aliphatic alpha-hydroxy acids having from about 2-7 carbon atoms; aliphatic and aromatic beta-keto compounds having from about 4-9 carbon atoms; or 2- and 4-pyrones having a hydroxyl group alpha to the carbonyl and having 5 or 6 carbon atoms; said chelating agent being present in an amount of at least about 1.0 ppm of the total solution. A method of enhancing oil recovery comprising employing as a mobility control solution in oil-bearing formations a mixture of xanthan biopolymer and a chelating agent is also disclosed.

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Pfizer Technical Bulletin No. 97 "Pfizer Products for Petroleum Production".
Johansen, R. T. et al. "Detergent and Citric Acid Clean-Out Procedure", Producers Monthly, Dec. 1957.
Lipton, Daniel, "Improved Injectability of Biopolymer Solutions" SPE Paper No. 5099, 1974.

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