Oil pared gains Friday after rising as much as 2% in a knee-jerk reaction to U.S. air strikes against Syria.
The strikes were against an airbase which the U.S. claims was use to launch the chemical bombing of a rebel-held area.
The move sparked concerns about a possible disruption to oil supplies.
Major producers Russia and Iran are backers of the Syrian regime.
U.S. crude was up 45 cents, or 0.87%, at $52.15 at 07:15 ET. Brent crude added 35 cents, or 0.64%, to $55.24.
Baker Hughes rig count data are due out later in the session.
There are underlying concerns that higher U.S. output could cancel out the impact of cuts by major producers.
OPEC and non-OPEC producers are cutting output by 1.8 million barrels a day in the first half.