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Oil derrick pumps operate at the Inglewood Oil Field in Culver City, California, on Sunday, July 11, 2021.

Oil prices were set for a second straight weekly loss, but found a floor above $100 a barrel on Friday after volatile trading this week with no easy replacement for Russian barrels in sight in a market already marked by tight supply.

Brent crude futures advanced 1.21%, or $1.29, to end the day at $107.93 per barrel, after surging nearly 9% on Thursday in the largest percentage gain since mid-2020.

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