Method and material to reduce acid-carbonate reaction rate by endothermic reaction

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United States of America Patent

PATENT NO 11866639
APP PUB NO 20220348815A1
SERIAL NO

17660738

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Abstract

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Well treatment fluids may include solid particles comprising one or more components selected from the group consisting of urea, ammonium nitrate, ammonium chloride, barium hydroxide, and ammonium thiocyanate. These well treatment fluids may also include a carrier fluid, which may be an aqueous polymeric fluid, an oil, or combinations thereof. The aqueous polymeric fluid may include a polymer selected from the group consisting of guar gum, hydroxypropyl guar, carboxymethyl hydroxypropyl guar, cellulose, or polyacrylamide. The oil may include a material selected from the group consisting of diesel, mineral oil, and wax. Methods for reducing an acid carbonate reaction in a carbonate formation may include pumping a composition of solid particles into a formation; releasing the solid particles from the capsules or emulsion within the formation; and injecting an acid following the releasing step or during pumping, wherein the acid carbonate reaction is carried out at a reduced reaction rate.

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Patent Owner(s)

  • SAUDI ARABIAN OIL COMPANY

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chang, Fakuen Frank Houston, US 26 92
Li, Wenwen Pearland, US 90 350

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