Iron control composition, make, and use in carbonate stimulation

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United States of America Patent

PATENT NO 11795378
APP PUB NO 20200332178A1
SERIAL NO

16386468

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Well stimulating fluids and methods may use a first and a second chelating agent, e.g., diethylene triamine pentaacetic acid (DTPA), glutamic diacetic acid (GLDA), and/or hydroxyethyl ethylene diamine triacetic acid (HEDTA), particularly in amounts of from 1 to 10 wt. %, to control iron precipitation during the stimulation process. Such fluids can stabilize iron ions without precipitation to manage the efficiency and performance of the stimulation fluid. Such stimulation fluids can be used with for highly concentrated HCl solutions, e.g., more than 20 up to 28 wt. % or more, that are useful in emulsified acid formulations in acid fracturing or acidizing of carbonate formations.

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Patent Owner(s)

  • KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Elkatatny, Salaheldin Dhahran, SA 23 16
Geri, Badr Ba Dhahran, SA 1 0
Mahmoud, Mohamed Dhahran, SA 52 72
Patil, Shirish Dhahran, SA 3 4

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