Light, sweet crude oil prices on the New York market and Brent crude oil prices on the London market surged by more than $1/bbl on Feb. 1 as traders and analysts shrugged off a big jump in the US oil inventory report.

Brent crude was up 50 cents at $57.30 a barrel by 1115 GMT (6:15 a.m. ET) after settling up $1.22 in the previous session. U.S. light crude gained 30 cents to $54.18 after climbing by $1.07 on Wednesday.

A measure of oil volatility last month averaged the lowest in more than two years and futures in New York have been stuck between $50 and $55 a barrel since OPEC and other producing nations agreed Dec. 10 to reduce output. Price estimates compiled by Bloomberg show crude will average $52 during the first quarter this year, rising to $58 in the last three months of 2017.

Brent crude LCOc1 was up 25 cents at $55.83 a barrel at 0954 GMT, having traded in a narrow 53-cent range so far in the session. U.S. crude CLc1 rose 26 cents to $53.07.

Brent crude oil LCOc1 was down 20 cents a barrel at $55.03 by 0900 GMT. U.S. light crude CLc1 was down 30 cents a barrel at $52.33.

London Brent crude for March delivery had dropped 28 cents to $55.24 a barrel by 0657 GMT, after settling down 72 cents on Friday. NYMEX crude for March delivery was down 23 cents at $52.90 a barrel.

Brent crude futures LCOc1, the international benchmark for oil prices, were trading at $55.59 per barrel at 0313 GMT, up 51 cents, or 0.93 percent, from their last close. U.S. West Texas Intermediate (WTI) crude futures CLc1 were at $53.22 a barrel, up 47 cents, or 0.89 percent.

Brent crude LCOc1, the international benchmark for oil prices, was trading at $55.42 per barrel at 0441 GMT, down 7 cents from its last close. U.S. West Texas Intermediate (WTI) crude futures CLc1 fell 11 cents to $53.11 a barrel.

International benchmark Brent crude prices were up 68 cents at $54.84 a barrel at 0950 GMT. U.S. West Texas Intermediate (WTI) crude oil futures were trading up 63 cents at $52 a barrel.

Brent for March settlement rose 27 cents to $55.72 a barrel on the London-based ICE Futures Europe exchange. The contract fell 56 cents, or 1 percent, to $55.45 a barrel on Friday. Prices slid 2.9 percent last week, the biggest drop since November. The global benchmark crude traded at a premium of $2.32 to March WTI.