Investing.com - Oil was lower Monday as U.S. drilling activity continued to pick up.
That outweighed talk about a possible extension of an output cut by major producers to address the global supply glut.
U.S. crude was off 33 cents, or 0.69%, at $47.64 at 08:00 ET. Brent crude shed 25 cents, or 0.49%, to $50.67.
Baker Hughes weekly data Friday showed an increase in the U.S. rig count of 21 to 652, the highest level since September 2015.
OPEC and non-OPEC producers are cutting output by 1.8 million barrels a day in the first half.
Adherents to the agreement met in Kuwait over the weekend to review compliance with the cuts and a possible extension of the accord beyond June.
OPEC secretary-general Mohammad Barkindo expressed satisfaction with the "high level" of compliance with the cuts in the first two months of the year.
He said he expects "very high levels of conformity" in the coming months.
Some OPEC members along with Oman voiced support for a six-month extension of the cuts.
But Russia asked for more time and market analysis.