Oil prices edged up on Friday from 2017 lows, but posted a fourth week of losses as OPEC-led production cuts failed to allay concerns over global oversupply.
Oil prices hit six-month closing lows on Thursday and have tumbled more than 12 percent from late May when producers led by the Organization of the Petroleum Exporting Countries extended a pledge to cut output by 1.8 million barrels per day (bpd) for six months by another nine more months.
U.S. West Texas Intermediate (WTI) crude futures finished Friday's session at $44.74 per barrel, up 28 cents. They were down 2.4 percent on the week.
Brent crude futures were up 41 cents at $47.33 per barrel by 2:34 p.m. ET (1834 GMT). They fell as low as $46.70, the weakest level since May 5, in the previous session.
"It's going to be difficult to have a rally unless there's a disruption or some news from OPEC," said Olivier Jakob, managing director with PetroMatrix.