By Vera Eckert and Daniel Fineren
FRANKFURT/LONDON (Reuters) - Spreading unrest in Libya shut down 6 percent of oil output in Africa's No.3 producer and prompted a host of energy firms to pull out international staff, sending oil prices to above $105 a barrel.
Wintershall, the oil and gas exploration arm of BASF
The firms acted as dozens were reported killed in Tripoli as anti-government protests reached the capital for the first time and Benghazi, Libya's second city, appeared to have slipped out of control of forces loyal to Muammar Gaddafi.
Brent crude rose above $105 a barrel to 2-1/2 year highs on the unrest in Libya, most of whose oil exports flow to Europe and which pumps about 1.6 million bpd of crude oil, making it Africa's third-largest producer after Nigeria and Angola.
"The market is on edge about the potential for Middle East and North Africa supply disruptions," said Mike Wittner, Head of Commodities Research, Americas, at Societe Generale.
"If you've got reports that actual disruptions are starting to occur, it's going to have a supportive impact. A lot of it is high-quality crude and that is important as well."
Libya's oil is priced against European benchmark Brent crude, which traded as high as $105.08 on Monday, its highest since September 2008.
Oil industry and shipping sources said there was no sign of disruption to export flows from Libyan ports.
Most of Libya's oil production operations are located in the east of the country south of Benghazi.
MOVING OUT STAFF
Wintershall was the only company initially to disclose an impact on oil output, but several other firms said they were stopping other work or pulling staff out of Libya.
Britain's BP
"We are looking at evacuating some people from Libya, so those preparations are being suspended but we haven't started drilling and we are years away from any production," a BP spokesman said, adding BP has about 40 staff in the country.
Shell, whose operations in Libya are also limited to exploration, has temporarily relocated the dependents of expatriate staff outside the country, a spokesman said, declining to comment further on operations.
Austrian oil and gas group OMV
Norways's Statoil
Oil production from the isolated Murzuq oil field in the desert in the south of the country continues as normal, a spokesman for Repsol said on Monday.
French oil major Total
(Reporting by Vera Eckert in Frankfurt; Daniel Fineren, Emma Farge and Dmitry Zhdannikov in London, Svetlana Kovalyova in Milan, Wojciech Moskwa in Oslo; writing by Alex Lawler; editing by Keiron Henderson)