Methods for placement of sealant in subterranean intervals
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United States of America Patent
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Mar 5, 2013
Grant Date -
Nov 29, 2012
app pub date -
Aug 10, 2012
filing date -
Apr 4, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
Methods comprising identifying an interval of a subterranean formation to be treated, the interval comprising multiple portions, each portion having a different effective permeability; introducing a relative-permeability modifier into the interval; and, introducing a sealant into the interval. The relative-permeability modifier modifies the interval to have a more uniform effective permeability to water-based fluids. The relative-permeability modifier comprises a water-soluble polymer. The more uniform effective permeability of the interval allows for a more uniform treatment of the interval by the sealant than would be allowed without treatment of the interval with the relative-permeability modifier.
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