Method for reducing the permeability of subterranean formations
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United States of America Patent
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Jun 14, 1983
Grant Date -
N/A
app pub date -
Aug 10, 1981
filing date -
Aug 10, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates generally to the composition and method for reducing the permeability of subterranean formations penetrated by a wellbore. The composition of the present invention comprises a wellbore fluid having dispersed therein a fluid loss control agent comprising a polyester polymer which is substantially insoluble in the wellbore fluid. The polymer degrades in the presence of water at an elevated temperature to form small molecules which are soluble in a fluid in the subterranean formation. The method of the present invention comprises reducing the permeability of subterranean formations penetrated by a wellbore by placing the composition of the present invention down the wellbore.
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