* Keystone crude deliveries to U.S. cut by 85 pct through Nov
* API reports 6.4-mln-barrel drop in weekly U.S. crude stocks
* OPEC meets on Nov. 30 to discuss production targets (Updates throughout, changes dateline, previous SINGAPORE)
LONDON, Nov 22 (Reuters) - Oil prices spiked on Wednesday with U.S. light crude hitting highs not seen since July 2015 after faults on a major pipeline dented Canadian deliveries to the United States, where crude inventories were also reported to be falling.
U.S. light crude hit a 2-1/2-year high of $57.98 a barrel before easing to $57.74 by 0950 GMT, up 91 cents on the day.
Brent crude was up 48 cents at $63.05 per barrel.
Traders attributed the jump to an 85 percent cut in the amount of oil TransCanada Corp will deliver to the United States on its Keystone pipeline through the end of November, announced by the company on Tuesday.
Keystone, which carries 590,000 barrels per day of crude from Alberta's oil sands to markets in the United States, was shut last week after a 5,000-barrel spill in South Dakota.
"There is a shortage of crude oil into the United States. Hence the rally in the prices," PVM Oil Associates strategist Tamas Varga said.
This adds to a picture of falling crude inventories painted by the American Petroleum Institute (API) in its weekly report on Tuesday, with stocks dropping by 6.4 million barrels in the week to Nov. 17, far above analysts' expectations.
The latest official U.S. production and inventory data is due on Wednesday.
"If we see the U.S. Energy Information Administration ... confirming the big draw in crude oil stocks reported by the API last night, I think we will see the market going higher," Varga said.
Outside North America, markets have been supported by an effort led by the Organization of the Petroleum Exporting Countries to end a global supply overhang by restraining output.
The deal to curb production is due to expire in March, but is widely expected to be extended at the group's next meeting on Nov. 30.
"There is growing consensus that OPEC will extend their production cut deal at the end of the month. This confidence along with the current geopolitical environment has kept ICE Brent trading firmly above $60 per barrel," Dutch bank ING said.
"However, an outcome at the OPEC meeting which falls short of market expectations, will likely lead to a selloff, and given the large speculative long in Brent, this could be fairly severe," it added. (Additional reporting by Henning Gloystein in Singapore; Editing by Dale Hudson)