Benchmark oil prices posted a weekly loss after a choppy day of trading on Friday, pulled down by worries about a global economic slowdown.
OPEC-led supply cuts and U.S. sanctions against Venezuela provided crude with some support.
U.S. West Texas Intermediate crude futures stood ended Friday's session 8 cents higher at $52.72 per barrel, ending the week down 4.6 percent, their steepest weekly loss this year.
International Brent crude futures had erased earlier losses around 2:30 p.m. ET, gaining 51 cents to $62.14 per barrel. On the week, they are set for a loss of about 1 percent.