DRAG-REDUCING AGENT FOR USE IN INJECTION WATER AT OIL RECOVERY
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United States of America Patent
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app pub date -
Oct 25, 2012
filing date -
Jul 15, 2002
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Abandoned
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Abstract
A drag-reducing agent in an amount of 50-400 ppm in water having an electrolyte content of 0.01-7% by weight includes two zwitterionics, each including acyl containing surfactant and an anionic surfactant, where the hydrophilic group is a sulphate, a sulphonate or an ether sulphate. The water containing the drag-reducing agent is suitable to be used in injection water at oil recovery.
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