Reducing water flow
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United States of America Patent
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Feb 11, 2003
Grant Date -
N/A
app pub date -
Sep 20, 2000
filing date -
Feb 18, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A water shut-off is provided in a hydrocarbon well by injecting a first chemical composition, effective as a relative permeability modifier polymer, into the hydrocarbon and a water zone of the well followed immediately by the injection of a second chemical composition, which forms a flow blocking polymer composition, into the zones and, after a shut-in period for reaction of the relative permeability modifier polymer, back producing the polymer compositions from they hydrocarbon zones to provide a path for the hydrocarbons from the zones while allowing the flow blocking polymer compositions to form the water shut-off in the water zones.
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