Method of improving formation permeability using chlorine dioxide
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United States of America Patent
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Jul 16, 1991
Grant Date -
N/A
app pub date -
Jun 15, 1990
filing date -
Jun 15, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Permeability of a subterranean formation is increased by injecting into the formation sufficient amount of chlorine dioxide solution to react with formation clays and silicates. The pH of the ClO.sub.2 solution is controlled between 0.01 and 3.2 using preferably a mineral acid and liquid CO.sub.2 blended with the aqueous ClO.sub.2 solution.
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