Brent crude oil futures were up 92 cents, or 1.2pc, at $75.66 a barrel by 12:05 ET (1605 GMT), having traded as high as $75.74. U.S. West Texas Intermediate (WTI) crude oil futures were up 90 cents, or 1.3pc, at $73.29 a barrel.
"Volatility in energy remains elevated as traders grapple with short-term demand weakness from Delta variant concerns and expectations the crude deficits will last till the end of the year," said Edward Moya, senior analyst at OANDA.