Methods and compositions for reducing water production from subterranean formations
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United States of America Patent
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Dec 30, 1997
Grant Date -
N/A
app pub date -
Apr 17, 1996
filing date -
Apr 17, 1996
priority date (Note) -
Expired
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Abstract
The present invention relates to methods and compositions for reducing the production of water from water and oil producing subterranean formations. The methods basically comprise the introduction of an aqueous polymer composition into the water producing zones of the formation which cross-links after being placed therein. The compositions of the invention are comprised of a heavy brine and a graft copolymer of a hydrophilic polymer and a phosphonate.
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