* Correlation between Brent, U.S. crude breaks down in Asia trade
* U.S. crude set to fall back towards $88-technicals [
]* Coming Up: U.S. non-farm payrolls for December; 1330 GMT
By Alejandro Barbajosa
SINGAPORE, Jan 7 (Reuters) - Brent crude fell 0.7 percent on Friday to below $94 as a stronger dollar curbed the appeal of commodities for investors, while U.S. crude rebounded as traders unwound short positions after a fire shut down a Canadian oil sands facility.
Brent crude for February <LCOc1> fell 64 cents to $93.88 at 0422 GMT, about $5 higher than U.S. crude benchmark West Texas Intermediate <CLc1>, which gained 43 cents to $88.81, still on track for a 3 percent weekly drop.
"It seems to me that WTI was oversold compared to Brent and that is why it is correcting," said Tony Nunan, a risk manager with Tokyo-based Mitsubishi Corp.
"They may have bought Brent expecting the spread to widen as it did and now they are taking profit. With the back of both the Brent and WTI curves down, it's an anomaly at the front of the WTI curve."
A jump last week in crude stored at the Cushing, Oklahoma hub, the delivery point for U.S. crude benchmark West Texas Intermediate (WTI), caused WTI to trade at a discount as wide as $6.55 a barrel on Thursday.
"We doubt that such a large spread will be sustainable," Credit Suisse analysts including Stefan Graber said. "With the end of the winter season in February-March, energy prices may face further downward pressure."
The rebound in U.S. crude broke the correlation between the two main futures benchmarks at least temporarily.
A fire broke out on Thursday at Canadian Natural Resources Ltd's Horizon Oil Sands facility in northern Alberta, forcing a production shutdown. The Cushing hub mostly receives crude produced from Canadian oil sands. [
]"Someone is unwinding a WTI/Brent position in Asian time," said Ken Hasegawa, a commodity derivatives manager at Japan's Newedge brokerage.
"In the last two days, the spread had widened a dollar per day. It's possible that there is someone who has to cut losses this morning."
U.S. crude prices have had a turbulent first week of the year, seesawing in a range of almost $5 after touching a 27-month high of $92.58 a barrel on Monday. Front-month February crude was up 50 cents at $88.88 at 0300 GMT, having touched $87.85 on Thursday, the lowest intraday price since Dec. 20.
Strength in price, trading volumes and market structure of Brent crude has helped to lure some of the big investment money that has typically favoured U.S. oil futures. [
]Thursday's Brent premium to U.S. crude was the widest level since it hit $6.57 on May 13, 2010. If the premium pierces that seven-month high, it would be the widest since Feb. 12, 2009, when it rose above $10 on an intraday basis.
Brent's strength has been spurred by continued strong Asian demand and robust European product markets, while U.S. crude has been pressured by an extended build in stockpiles at Cushing, despite a drop in national stocks over the last five weeks.
The oil market's attention was also on Friday's U.S. monthly payroll report. Revised forecasts in a Reuters poll showed expectations that December U.S. nonfarm payrolls jumped 175,000 after November's small gain of just 39,000. [
]Thursday saw further pressure on oil from gains in the dollar against the euro, which weighed on dollar-denominated commodities. Recent U.S. data has painted a rosier economic picture in contrast to worries about the euro zone's sovereign debt crisis. [
]Japan's Nikkei average dipped 0.2 percent on Friday after U.S. stocks slipped with soft retail sales and a sharp rise in the dollar leaving investors edgy before December's U.S. employment report. (Editing by Michael Urquhart)