UPDATE 1-Brent slips on cloudy demand outlook; holds above $109
* Obama would accept short-term increase in debt ceiling
* Oil production in Gulf of Mexico ramping up towards normal
* North Sea crude set to reach a 2013 high in November
* China services PMI slowed in September - HSBC survey
SINGAPORE, Oct 8 (Reuters) - Brent futures fell slightly but held above $109 a barrel on Tuesday, as oil production in the Gulf of Mexico returned to normal and the U.S. budget crisis continued to cloud the outlook for demand in the world's biggest oil consumer.
President Barack Obama said on Monday he would accept a short-term increase in the nation's borrowing authority to avoid a default. The comment came one week into the government shutdown and only 10 days from a critical deadline to raise the country's debt ceiling.
Brent was 23 cents lower at $109.43 per barrel at 0507 GMT, after closing 22 cents higher on Monday. The benchmark had settled within a tight range between $109 and $110 per barrel in the previous four sessions.
U.S. oil was down 8 cents at $102.92 per barrel, after closing 81 cents lower.
Concerns continued to linger that the U.S. government shutdown will reduce demand for oil and hurt consumer confidence. JPMorgan economists estimate that every week of shutdown translates to a 0.12 percent reduction on the U.S. quarterly annualized GDP growth rate.
"Energy markets are carefully watching the situation in the United States. It's not so much about what is happening right at the moment, but how it will all work out," said Michael McCarthy, chief market strategist at CMC Markets in Sydney.
" volumes are woeful at the moment, and we see a lack of commitment on either side," said McCarthy.
NORTH SEA SUPPLY
Oil production in the U.S. Gulf of Mexico was ramping up toward normal on Monday after Tropical Storm Karen faltered off the Gulf Coast. Storm warnings had prompted energy firms to shut nearly two-thirds of oil output as of Saturday.
Prices were supported by a weak U.S. dollar that continued to hover near an eight-month low against a basket of major currencies on Tuesday. A softer dollar makes it cheaper for importing countries to buy oil priced in the U.S. currency.
Upward pressure on Brent could ease, as the supply of North Sea crude that underpins the benchmark is set to reach a 2013 high in November, according to loading programmes. The increase is another sign of ample supply in the Brent oil market, on top of the partial return of Libyan output.
Growth in China's services industry slowed in September from the previous month and optimism over the business outlook weakened, a survey by HSBC showed on Tuesday. The survey indicates a slow economic turnaround in China, which is expected to overtake the U.S. as the world's biggest crude oil importer this year.
The reading is in contrast to China's official services PMI, released last week, which showed the sector expanded at the fastest pace in six months in September as demand grew.
In other news, Colombia's second most important oil pipeline, the Cano Limon-Covenas, was temporarily shut down on Monday after three bomb attacks.
The closure of the 780-km (484 mile) 80,000 barrel-per-day pipeline owned by state oil company Ecopetrol did not immediately affect exports or oil production by U.S. oil producer Occidental Petroleum Corp, which feeds crude into the pipeline.
(Reporting By Jacob Gronholt-Pedersen; Editing by Michael Perry and Ed Davies)