Oil prices eased on Monday after rebels in Nigeria withdrew a threat to target oil operations, but lingering concerns over stretched supplies ahead of winter kept prices close to $50 a barrel.
US light crude eased 21 cents from Friday's record settlement price of $50.12 to settle at $49.91, less than a dollar below record highs hit last week. London's Brent crude fell 41 cents to settle at $46.19 a barrel.
Prices eased as oil companies considered returning evacuated workers to Nigeria's oil-producing delta region following a peace deal signed by a rebel militia on Friday.
Despite concerns that the deal might not stick, the military appeared to be respecting an agreement not to launch attacks on rebel warlord Mujahid Dokubo-Asari.
The threat to Nigerian crude flows of about 2.3 million barrels per day (bpd) came at a time when producers are pumping almost at full tilt, leaving little slack in the system.
Ongoing disruption to energy operations in the Gulf of Mexico - home to about 25 percent of US oil and gas production - following Hurricane Ivan was also a concern.
Oil production in the US Gulf was still cut by some 480,000 bpd due to damaged output facilities, the US Minerals Management Service (MMS) said on Monday.
That amounts to about 29 percent of the US' Gulf production of 1.7 million bpd still lost, nearly three weeks after production was first curbed ahead of the storm.
"The MMS numbers show there's some decent damage done (to production) and that is one of the things supportive for the market," said Kyle Cooper analyst at Citigroup Global Markets.
US consultancy PIRA Energy estimates at least 40 million barrels equivalent of oil and gas will be deferred by Hurricane Ivan.
"What gives added oomph is the slow rate at which production is being brought back on line," said analysts PFC Energy in a report.
G7 CALLS FOR MORE SUPPLIES: The world's top economic leaders from the Group of Seven countries on Friday urged oil producers to pump more crude to bring down prices, which threaten to stunt economic growth.
"Oil prices are high and remain a risk," said a communiqué after talks between finance ministers and central banks from the G7 nations - Britain, Canada, France, Germany, Italy, Japan and the United States.
"So first, we call on oil producers to provide adequate supplies to ensure that prices moderate," the closing communiqué said. "Second, it is important consumer nations increase energy efficiency."
Kuwait's energy minister, Sheikh Ahmad al-Fahd al-Sabah, said on Monday he expects prices to start falling only in the second quarter of next year.
Opec, which controls more than half of the world's exports, is producing at a 25-year high close to 30 million barrels per day in a bid to cool prices.
ASIAN TRADE: Oil prices slipped slightly at Singapore trading on Monday after a threat to Nigerian crude flows receded, but lingering concerns of a possible severe disruption to supplies ahead of winter held the market close to $50 a barrel.
US light crude slid 37 cents to $49.75 a barrel, while London's Brent crude fell 43 cents to $46.19 a barrel.