* Oil pauses after slide to 13-month low
* Governments around world act to shore up banks
* Goldman Sachs slashes oil forecast, turns near-term bear
* Saudi cuts November oil shipments to Europe (Recasts, updates prices, previous PERTH)
LONDON, Oct 13 (Reuters) - Oil rose more than $3 a barrel on Monday, after governments around the world acted to boost confidence in the global financial system, prompting a rally in European and Asian stock markets and a rebound in commodities.
But investment bank Goldman Sachs said the financial crisis had already done more damage than it expected to commodity demand and warned that a slide to $50 a barrel for oil could be possible. [
]U.S crude <CLc1> for November delivery was up $3.48 at $81.18 a barrel by 1019 GMT.
Prices had plunged on Friday to their lowest since Sept. 10, 2007. London Brent crude <LCOc1> was up $3.23 at $77.32 a barrel.
"The announcements from over the weekend would have some positive effects on the markets, even though it's still in very early days at this stage to say if they would put an end to the financial crisis," said David Moore, a commodities analyst at the Commonwealth Bank of Australia.
Goldman Sachs, once a longstanding commodity bull, turned a near-term bear on Monday after conceding that global financial turmoil would take a far bigger toll on demand. It warned that $50 oil was possible if the crisis deepened.
"We have underestimated the depth and duration of the global financial crisis and its implications on economic growth and commodity demand," its commodity markets research team said.
The bank cut its year-end U.S. crude oil target to $70 a barrel, down from a previous forecast of $115 a barrel, and slashed its average 2009 forecast by a third to $86 a barrel.
A fall in demand in the United States and other developed economies has helped drive oil down nearly 50 percent from its July peak of above $147 a barrel.
A boom in consumption from emerging markets such as China had contributed to a six-year rally in commodity prices.
Oil's fall has caused some members of the Organization of the Petroleum Exporting Countries to call for a cut in production levels. The producer group has agreed to hold an emergency meeting in Vienna on Nov. 18 to discuss the impact of the global financial crisis on the oil market.
Iran is set to push for a cut in oil output at the meeting, its oil minister said in comments published on Sunday, adding investment conditions in the oil industry would be severely hit unless OPEC acted decisively to arrest the current fall in oil prices. [
]Saudi Arabia, the world's biggest exporter and OPEC's most influential member, has cut November supplies to one major European refiner, according to a trade source. But the kingdom told major Asian refiners that it would maintain crude oil shipments unchanged. [
] (Reporting by Jane Merriman in London and Fayen Wong, editing by Anthony Barker)