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US 10,479,930 B2Granted
Organic acid fracturing fluid composition
AssigneeKing Fahd University of Petroleum and Minerals
InventorsMohamed Ahmed Nasr El-Din Mahmoud, Salah El-Din Elkatatny, Marwan Nagm Eldeen Mohammad
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Abstract
A fracturing fluid composition that includes a chelating agent, e.g. GLDA, and a polymeric additive comprising a copolymer of acrylamido-tert-butyl sulfonate and hydrolyzed polyacrylamide diluted in an aqueous base fluid, e.g. seawater, and a method of fracking a geological formation using the fracturing fluid composition. Various embodiments of the fracturing fluid composition and the method of fracking are also provided.
Claims5
An organic acid fracturing fluid composition, comprising:
- an aqueous base fluid;
- a chelating agent comprising glutamic diacetic acid in an amount of 5-20 wt %, wherein wt % is relative to the total weight of the fracturing fluid composition;
- and
- a polymeric additive comprising a copolymer of acrylamido-tert-butyl sulfonate and partially hydrolyzed polyacrylamide, in an amount of 0.45-1 wt %, wherein wt % is relative to the total weight of the fracturing fluid composition, wherein the polymeric additive is present in the fracturing fluid composition at a concentration of no more than 1 wt % relative to the total weight of the fracturing fluid composition;
- wherein a weight percent of acrylamido-tert-butyl sulfonate in the copolymer is in the range of 5 to 20 wt %, and a weight percent of the partially hydrolyzed polyacrylamide in the copolymer is in the range of 80 to 95 wt %, each relative to the total weight of the copolymer.
2 more elements
Dependencies are inferred from the claim text.