Iraq’s oil exports go overwhelmingly through the southern port of Basra. Since the war, Iraq’s northern route to Turkey has been largely inoperable due to war damage and frequent sabotage<
http://www.eia.doe.gov/emeu/cabs/Iraq/Oil.html>
...Under optimal conditions, and including routes through both Syria and Saudi Arabia that are now closed or being utilized for other purposes, Iraq's oil export infrastructure could handle throughput of more than 6 million bbl/d (2.8 via the Gulf, 1.65 via Saudi Arabia, 1.6 via Turkey, and perhaps 300,000 bbl/d or so via Jordan and Syria). However, Iraq's export facilities (pipelines, ports, pumping stations, etc.) were seriously disrupted by the Iran-Iraq War (1980-1988), the 1990/1991 Gulf War, the most recent war in March/April 2003, and periodic looting and sabotage since then.
Between April 2003 and June 2006, there were an estimated 315 attacks on Iraqi energy infrastructure, including the country's 4,350-mile-long pipeline system and 11,000-mile-long power grid. In response to these attacks, which have cost Iraq billions of dollars in lost oil export revenues and repair costs, the U.S. military set up Task Force Shield to guard Iraq's energy infrastructure, particularly the Kirkuk-Ceyhan oil pipeline.
In August 2003, a South African security company, Erinys International, won a $40 million contract to train 6,500 armed guard to protect Iraqi oil wells, pipelines, refineries, and power plants, mostly in southern Iraq. Until late 2004, when the Iraqi Oil Ministry took charge of security at oil facilities,
Erinys operated as part of a $100 million joint contract with approximately 14,000 guards (mainly Iraqi nationals). In support of Erinys, Florida-based AirScan Inc. provides aerial surveillance of Iraqi pipelines. Under Saddam Hussein, Iraqi pipelines were guarded in part by local tribes, and in part by two army divisions....
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(HELLO! Here's the real reason , but un-spinable, reason for the for the war with Iraq!)
...Between 2001 and March 2003, Iraq and Syria utilized the 50-year-old, 32-inch Banias oil pipeline in violation of U.N. sanctions. The Banias line, from Iraq's northern Kirkuk oil fields to Syria's Mediterranean port of Banias (and Tripoli, Lebanon), reportedly was being used to transport as much as 200,000 bbl/d of Iraqi oil, mainly from southern Iraq, to Syrian refineries at Homs and Banias. The oil was sold at a significant price discount and freed up additional Syrian oil for export. Iraq and Syria also had talked of building a new, parallel pipeline as a replacement for the Banias line.
In March 2003, flows on the pipeline were halted, although the U.S. Defense Department denied that its forces had targeted the line. In early March 2004, it was reported (by Dow Jones) that the Iraq-Syria pipeline was ready for use at 250,000 bbl/d.
During the Iran-Iraq War, Iraq also built a pipeline through Saudi Arabia (called IPSA) to the Red Sea port of Mu'ajiz, just north of Yanbu. IPSA has a design capacity of 1.65 million bbl/d, but was closed after Iraq invaded Kuwait in August 1990.
In June 2001, Saudi Arabia expropriated the IPSA line, despite Iraqi protests. In June 2003, Thamir Ghadban said that he hoped Iraq would be able to use the IPSA line again. However, the Saudis have stated that they are not willing to do this, having converted the line to carry natural gas to the Red Sea industrial city of Yanbu for domestic use.
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http://www.eia.doe.gov/emeu/cabs/Iraq/Oil.html>