Methods for Stimulating Oil or Gas Production Using a Viscosified Aqueous Fluid with a Chelating Agent to Remove Calcium Carbonate and Similar Materials from the Matrix of a Formation or a Proppant Pack
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United States of America Patent
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app pub date -
Sep 12, 2012
filing date -
May 10, 2007
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Abstract
Methods for treating a subterranean formation can comprise introducing a treatment fluid comprising dicarboxymethyl glutamic acid (GLDA) or a salt thereof into a subterranean formation, and at least partially removing an iron-containing material in the subterranean formation using the GLDA. Treatment fluids used in the methods may have a pH equal to or greater than about 2.
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