Iraq began pumping crude oil from its northern oil fields on Wednesday for the first time since the war - a milestone in the restoration of the country's oil production that augurs well for thirsty world markets.

　　Iraq sits atop the world's second-largest proven crude reserves, and oil exports are vital to its postwar reconstruction. Before the war halted Iraq's oil production, the country pumped around 2.1 million barrels a day, most of it for export.

　　Analysts said it was unclear how reliable the flow of oil from fields near the northern Iraqi city of Kirkuk might prove to be, but the reopening of the pipeline to Turkey's Mediterranean coast is a key step in rebuilding Iraq's oil industry.

　　Saboteurs and looters have dogged efforts to rehabilitate the 600-mile pipeline from Kirkuk to the Turkish city of Ceyhan. The lack of storage and export facilities forced the Iraqis to place much of the northern crude left over after refining for domestic use back into natural underground reservoirs.

　　"The export program has been stymied by unfortunate but continuing acts of sabotage. This is still the issue," said Michael Rothman, chief energy strategist at Merrill Lynch in New York. He said Iraqi oil exports were a paltry 300,000 barrels a day in July.

　　Iraq began exporting from its giant southern oil fields last month, sending fresh crude to ships waiting offshore in the Persian Gulf at the export terminal of Mina el-Bakr. These southern exports have been intermittent, however, due to power outages at the terminal and other interruptions.

　　Although Iraq's big northern fields also resumed production after the US-British invasion, crude from the north was unavailable for export until now.

　　Delays in Iraqi exports have helped lift US oil prices to well above US30 per barrel. Despite historically low inventories of crude in major importing countries, members of the Organization of Petroleum Exporting Countries agreed on July 31 to keep output steady - a decision that provided no comfort to consumers.

　　"At the end of the day, the oil coming out of Iraq is something the market needs," Rothman said.

　　"In a couple of weeks, you should be able to start inviting tankers to come on down," said Peter Gignoux, head of the petroleum desk at Salomon Smith Barney in London.

　　Iraqi Oil Ministry officials could not confirm that crude was flowing into the pipeline.

　　Iraq was expected to pump between 300,000 and 400,000 barrels a day to Ceyhan. No oil tankers are currently booked to load there, and oil was expected to flow for about 10 days before any vessels would be sent for loading.