Oil prices hold ground, but set for 4 percent weekly fall

TOKYO (Reuters) - Oil prices steadied on Friday after a market rout driven by sharp falls in equity markets and indications that supply concerns have been overblown, but were still on track for a fall or more than 4 percent for the week.

Brent crude futures edged up 13 cents to $80.39 a barrel by 0042 GMT. The contract fell 3.4 percent on Thursday, after hitting a low of $79.80, its weakest since Sept. 24.

U.S. West Texas Intermediate (WTI) crude futures were up 11 cents at $71.08 a barrel, after falling 3 percent in the previous session to the lowest since Sept. 21.

Wall Street extended its slide into a sixth session and a global equity index fell to a 1-year low on Thursday as investors feared an escalating U.S. trade war with China and risks from a recent climb in interest rates.

Japan's Nikkei was slightly lower in early trading on Friday.

On the oil front, U.S. crude inventories rose by 6 million barrels last week, the Energy Information Administration said, more than double analysts' expectations of a 2.6 million-barrel increase. [EIA/S]

The Organization of the Petroleum Exporting Countries cut its forecast of global demand growth for oil next year for a third straight month, citing headwinds facing the broader economy from trade disputes and volatile emerging markets.

OPEC sees the oil market as well supplied and is wary of creating a glut next year, the group's secretary-general said on Thursday.

In the U.S. Gulf of Mexico, producers had cut output by 40 percent on Thursday due to Hurricane Michael, according to the Bureau of Safety and Environmental Enforcement, even as some operators began returning crews to offshore platforms.

The cuts represent 680,107 barrels per day of oil production, the bureau said, citing reports from 30 companies.

Michael crashed ashore Florida on Wednesday as the third most powerful hurricane to strike the U.S. mainland, leaving seven people least. It has since weakened to a tropical storm.

(Reporting by Aaron Sheldrick; editing by Richard Pullin)