Oil prices widened their losses in European trade on Monday under pressure from higher U.S. oil rig count, which points at increased shale production.
As of 12:45 GMT, U.S. crude fell to $52.50 a barrel from the opening of $53.30, with an intraday high at $53.45, and a low at $52.33.
Brent crude fell to $54.90 a barrel from the opening of $55.55, with a session-high at $55.73, and a low at $54.64.
U.S. crude March futures rose 2% on Friday, the first gain in four days, while Brent March futures gained 2.3% as most dollar-denominated commodity futures rose.
Baker Hughes reported a rise of 29 rigs in the U.S. oil rig count to a total of 551 rigs, the highest since the week ending November 25, 2015.
The data bolstered the outlook of increase U.S. shale production, as companies benefit from a surge in oil prices to 18-month highs.
The EIA forecast last week an increase in U.S. shale production in February, the first such increase in four months, as producers ramp up their digging activities.