* Refinery rates down, product prices up
* Saudi Arabia to deepen output cuts in February (Updates prices, changes timeline from previous LONDON)
By Edward McAllister
NEW YORK, Dec 31 (Reuters) - US crude oil prices jumped above $40 a barrel in thin pre-holiday trade on Wednesday, tracking a 4 percent jump in heating oil futures as a slowdown in domestic refinery activity sparked fears of tightening fuel supplies this winter.
U.S. crude oil futures for February <CLc1> rose $1.62 to $40.65 per barrel by 12.44 p.m. EST (1744 GMT) -- still more than 60 percent below last year's closing level of $95.98 but up from this year's low of $32.40 hit on Dec. 19, but
London Brent <LCOc1> was up $1.69 at $41.84.
Weekly U.S. inventory data on Wednesday showed a decline in refinery activity and a 500,000 barrel rise in crude stocks, compared with forecasts for a 1.5 million barrel decrease.
"There's a sign that the industry might be cutting back on production rates to try to boost margins. As heating oil and gasoline prices are rallying, crude is tagging along," said Gene McGillian, analyst at Tradition Energy Stamford, Connecticut.
"The market is trading in pretty thin volume ahead of tomorrow's hoilday and I think that's contributing to some of the strength," he added.
Inventories of refined products also rose, though less than analysts had expected. Gasoline stockpiles increased by 800,000 barrels, less than forecasts for a 1.5 million barrel build, while distillates rose by 700,000 barrels, below expectations for a 1.1 million barrel increase.
Demand for both gasoline and distillates, which include heating oil, was lower than the same time a year ago, extending the trend for reduced consumption. [
]Markets also were watching a dispute over gas supplies between Russia and Ukraine, which may have to buy distillates from Europe if gas supplies from Russia are halted. [
]Oil prices went on a wild ride in 2008, surging to a record high above $147 in July and then plunging as the global economic slowdown bit deep into energy demand. The latest U.S. inventory data showed further rises in fuel stocks.
Analysts forecast an average of $49 a barrel for U.S. crude in the first quarter, and an average of $58.48 for next year, down $14 from their previous forecasts, the latest Reuters poll showed. [
]Faced with slumping demand and prices, the Organization of the Petroleum Exporting Countries (OPEC) this month said it was cutting output 2.2 million barrels per day (bpd), its deepest reduction ever.
Evidence is mounting that OPEC is complying with its goal to reduce production, led by top exporter Saudi Arabia.
Market sources said on Tuesday the kingdom's supplies to long-term buyers in February could imply production of even less than its new OPEC production target. [
] (Additional reporting by Robert Gibbons in New York, Christopher Johnson in London and Chua Baizhen in Singapore; editing by Anthony Barker)