PREVENTION OF SLUDGE FORMATION DURING ACIDIZING PROCEDURES
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United States of America Patent
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Sep 18, 2014
app pub date -
Mar 15, 2013
filing date -
Mar 15, 2013
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The present disclosure provides chemical compositions useful for minimizing or preventing the precipitation of sludge, such as asphaltenes, maltenes, or similar asphaltic components, during an acidizing treatment. Methods for preventing or minimizing sludge formation are also disclosed. The anti-sludge compositions can be added to an aqueous acidic solution before injecting the solution into a well for treatment. The compositions can include a formulated dodecylbenzene sulfonic acid, a cationic surfactant, a corrosion inhibitor, and an iron reducing agent, in addition to other additives.
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