* World oil demand growth for 2011 revised down slightly
* China, Brazil, Middle East to drive demand next year
* China demand revised up by 50,000 bpd for 2010, 2011 (Adds higher non-OPEC and OPEC oil output, U.S. winter heating fuel costs)
WASHINGTON, Oct 13 (Reuters) - The U.S. government lowered its forecast of growth in world oil demand for 2011 on Wednesday, but expects developing countries to keep boosting global petroleum consumption.
World oil demand is expected to rise 1.38 million barrels per day next year to 87.44 million bpd, the Energy Information Administration said, down slightly from the 1.41 million bpd increase that it projected last month.
Developing regions such as China, Brazil and the Middle East are expected to be the main drivers of oil demand in 2011.
In its new monthly report, the EIA raised its forecast for growth in world oil demand in 2010 by 110,000 bpd, with consumption now expected to climb 1.73 million bpd to 86.06 million bpd.
The revision is in response to stronger-than-expected growth in oil demand in China and developed countries during the first half, the agency said.
China's oil demand was revised up by 50,000 bpd for 2010 and 2011, with fuel use seen at 9.02 million bpd and 9.55 million bpd, respectively.
On the supply side, the EIA raised its forecast for non-OPEC crude oil production growth this year by 200,000 barrels per day from the agency's prior estimate.
The agency said it now expected non-OPEC oil output to increase 900,000 bpd this year to an average 51.36 million bpd.
Most of this year's production growth will come from the United States, Brazil and the former Soviet Union, the EIA said.
For 2011, the EIA increased its forecast decline in non-OPEC oil output by 80,000 bpd, with production now seen dropping 240,000 bpd to an average 51.12 million bpd.
Next year's drop will be due to declining North Sea and North American production -- with Mexico's output falling 170,000 bpd -- as well as decreasing supplies from Russia.
"This would be only the third time in the last 15 years that non-OPEC supplies fail to grow year-over-year, following non-OPEC production declines in 2005 and 2008, which were mainly the result of supply disruptions in the Gulf of Mexico," the EIA said.
U.S. oil production from the Gulf of Mexico is expected to drop next year by 170,000 bpd, about 50,000 bpd higher than the agency forecast last month.
The decline partly reflects lost production from a deepwater-drilling moratorium imposed after the BPoil spill.
The U.S. Interior Department ended the drilling ban this week, but new safety rules will likely delay the issuance of new drilling permits until near the end of this year.
The EIA forecast OPEC crude production to gain slightly, up 300,000 bpd in 2010 and 600,000 bpd in 2011, to accommodate increasing consumption and keep oil prices from rising dramatically.
OPEC ministers meet this week to discuss oil market conditions.
The EIA expects U.S. oil prices to average about $80 a barrel this winter, up $2.50 from last year, and then gradually rise to $85 by the fourth quarter of 2011 as the U.S. and global economies improve.
The agency said average heating fuel costs this winter for U.S. households would increase 2.5 percent, or $24, from last winter.
It will cost more to heat with heating oil (up 12 percent), natural gas (up 4 percent) and propane (up 8 percent), but less with electricity (down 2 percent), the EIA said. (Reporting by Ayesha Rascoe and Tom Doggett; editing by Dale Hudson and Jim Marshall)
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