Method for treatment of underground reservoirs
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United States of America Patent
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Oct 25, 2011
Grant Date -
Jun 17, 2010
app pub date -
Jul 3, 2008
filing date -
Jul 6, 2007
priority date (Note) -
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Abstract
A process is disclosed for treating an underground formation, which process comprises: (a) introducing into the underground formation a micellar dispersion comprising water, one or more organic acid precursors, one or more surfactants and, optionally, one or more salts, co-surfactants and/or organic liquids that are not organic acid precursors; and (b) allowing (i) the micellar dispersion to solubilize hydrocarbons, emulsions or water blocks present in the underground formation, and (ii) at least a portion of the organic acid precursor to hydrolyze in-situ to produce sufficient organic acid to substantively dissolve acid soluble material present in or adjacent to filter cakes or other damage in the underground formation.
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