By Stephanie Kelly
NEW YORK (Reuters) - Oil prices were little changed on Friday, supported by expectations that sanctions on Iran would tighten supplies, but prices were headed for a weekly drop as a slump in stock markets and concerns about trade wars clouded the fuel demand outlook.
Brent crude futures rose 28 cents to $77.17 a barrel by 11:11 a.m. EDT (1511 GMT). The global benchmark is on course for a weekly loss of about 3.2 percent and is down about $10 in three weeks.
U.S. West Texas Intermediate (WTI) crude futures fell 10 cents to $67.23 a barrel. It was on track for a weekly loss of about 2.7 percent.
Supporting prices on Friday, Iraq will stop trucking crude oil from its northern Kirkuk oil field to Iran in November to comply with U.S. sanctions, two sources familiar with Iraqi oil export operations said on Friday.
"The market has to wake up to the fact that Iranian sanctions are happening Nov. 4. That's just a couple weeks away," said Phil Flynn, an oil market analyst at Price Futures Group in Chicago.
The market for months has weighed concern surrounding potential supply shortages from U.S. sanctions on Iran, due to come into force Nov. 4. Washington has said it wants to reduce Iranian oil sales to zero, although this looks unlikely.
Many buyers, including Iran's biggest customer, China, appear to be falling in line, forcing Tehran to store unsold oil on tankers in the hope it can sell the crude once sanctions are lifted.
However, a global collapse in equities has roiled oil markets this week. The Nasdaq Composite confirmed a correction this week, while the S&P 500 and the Dow Jones Industrial Average erased their gains for the year.
"The energy complex is maintaining a relatively strong correlation with daily swings in the U.S. stock market since the huge up and down equity fluctuations have become too large to ignore," Jim Ritterbusch, president of Ritterbusch and Associates, said in a note.
Financial markets have been hit hard by a range of worries, including the U.S.-China trade war, a rout in emerging market currencies, rising borrowing costs and bond yields, and economic concerns in Italy.
There are also signs of a slowdown in global trade, with container and bulk freight rates dropping after rising for most of 2018.
Meanwhile, Saudi Arabia's OPEC governor said on Thursday oil markets could face oversupply by the end of the year.
"The market in the fourth quarter could be shifting towards an oversupply situation as evidenced by rising inventories over the past few weeks," Adeeb Al-Aama told Reuters.
Saudi Energy Minister Khalid al-Falih said there could be a need for intervention to reduce oil stockpiles after increases in recent months.
Meanwhile, U.S. production is soaring, boosted by technological advances that have enabled drillers to tap shale formations, with output this year forecast to overtake the previous annual record in 1970. [EIA/M]
The U.S. rig count, an indicator of future production, last week hit its highest since March 2015, after stalling this summer due to pipeline constraints in largest U.S. oil patch. This week's data is due at 1 p.m. [RIG/U]
(Reporting by Stephanie Kelly in New York, Christopher Johnson in London, Henning Gloystein in Singapore and Aaron Sheldrick in Tokyo; Editing by Marguerita Choy and Kirsten Donovan)
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