* IEA trims 2011 oil demand growth forecast by 50,000 bpd
* Front-month US crude strengthens relative to Brent, curve
* Enbridge says oil Line 6A still shut, cleanup continues
(Adds Enbridge, comment, updates prices)
By Marie-Louise Gumuchian
LONDON, Sept 10 (Reuters) - U.S. crude rose more than $1 a barrel to over $75 on Friday due to the shutdown of a major pipeline, but a leading forecaster said demand would stay tepid.
The International Energy Agency said global oil demand growth was expected to increase a little this year but to slip in 2011 and that fuel consumption could be much weaker if the world economy slows. [
]Front-month U.S. crude for delivery in October <CLc1> rose $1.32 to $75.57 a barrel at 1350 GMT after earlier approaching a three-week high near $76. It touched $75.96 on Thursday, the highest intraday price since Aug. 19.
The November contract <CLc2> added 80 cents to $76.59.
Brent crude <LCOc1> gained 2 cents to $77.49.
"Since markets dislike uncertainty, they will usually discount a worse case situation until some clarity is forthcoming," Jim Ritterbusch, president at Ritterbusch & Associates in Galena, Illinois, said in a research note.
Enbridge Inc <ENB.TO> said on Friday that Line 6A pipeline, which carries crude oil from Canada to the Midwest and Cushing, Oklahoma, remained shut as the cleanup of an oil leak continued near Romeoville, Illinois. [
]Canada is the largest oil exporter to the U.S., and Enbridge's pipelines carry the lion's share of that crude.
Enbridge Inc <ENB.TO> closed its 670,000 barrel-per-day (bpd) Line 6A, the largest of the company's major three, after a leak was discovered near Romeoville. The duct accounts for 7-8 percent of total U.S. crude imports. [
]Six weeks ago Enbridge was forced to shut down another smaller part of its Lakehead system, which the U.S. government has not yet allowed to resume operations following heightened scrutiny because of BP Plc's <BP.L> Gulf of Mexico spill.
BRENT PREMIUM SHRINKS
The IEA, which advises major industrial countries on energy policy, said global oil supply was more than sufficient to meet demand, highlighting high levels of industry stocks across the developed world.
Record stockpiles in the United States have this month depressed the price of U.S. benchmark crude relative to European Brent <LCOc1>. The Enbridge pipeline shutdown might help ease a glut at the Cushing, Oklahoma, pricing point, which is chiefly supplied with Canadian oil.
Brent posted its biggest premium to WTI since mid-May earlier this week at more than $3.50 a barrel, shrinking on Friday to just under $2.
"We don't know the timeline for when the leak is likely to be fixed. We're likely to see more draws in Cushing than was previously expected," Amrita Sen of Barclays Capital said. <^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Graphic of Enbridge system: http://link.reuters.com/qyz52p ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^>
World stocks measured by MSCI All-Country World Index <.MIWD00000PUS> were up 0.11 percent. The dollar was up 0.09 percent against a basket of currencies. <.DXY> (Additional reporting by Gene Ramos in New York and Alejandro Barbajosa in Singapore; editing by Jane Baird and Keiron Henderson)