International benchmark Brent crude oil futures LCOc1 were trading down 10 cents at $48.85 per barrel at 0709 GMT, having closed down 1.8 percent the previous day. U.S. West Texas Intermediate (WTI) crude futures were at $46.73 a barrel, down 4 cents, after dropping 2.8 percent on Wednesday.

International Brent crude oil futures were trading at $48.86 per barrel at 0644 GMT (0244 ET), down 30 cents, or 0.61 percent, from their last close. U.S. West Texas Intermediate (WTI) crude was down 40 cents, or 0.84 percent, at $47.01 per barrel.

Brent crude futures LCOc1 were trading at $49.39 per barrel at 1028 GMT, down $1.49 from their last close. U.S. West Texas Intermediate (WTI) crude Clc1 was down $1.27 at $47.25 a barrel.

This summer the U.S. oil price has whipsawed from more than $50 a barrel in June to below $40 earlier this month. In the past two weeks it has risen more than 20%, to a recent $48.22 a barrel.

International Brent crude oil futures were trading at $46.20 per barrel at 8.47 p.m. ET, up 16 cents, or 0.35 percent, from their last close and not far off their $46.30 monthly high reached in the previous session. U.S. West Texas Intermediate (WTI) crude futures were at $43.71 a barrel, up 22 cents, or 0.51 percent, from their last close.

Brent crude LCOc1 was up 27 cents a barrel at $42.07 at 0957 GMT (0557 EDT). It reached $41.51 on Tuesday, the lowest since April 18. U.S. crude CLc1 added 28 cents to $39.79.

North Sea Brent crude oil prices averaged $60/barrel (b) in April, a $4/b increase from March and the highest monthly average of 2015. Despite increasing global inventories, several factors contributed to higher prices in April, including indications of higher global oil demand growth, expectations for declining U.S. tight oil production in the coming months, and the growing risk of unplanned supply outages in the Middle East and North Africa.

Brent crude oil prices will average $58/bbl in 2015 and $75/bbl in 2016

The growing uncertainty surrounding oil prices presents a major challenge to all price forecasts. EIA's January Short-Term Energy Outlook (STEO), released yesterday, forecasts Brent crude oil prices averaging $58/bbl in 2015 and $75/bbl in 2016, with annual average WTI prices expected to be $3/bbl to $4/bbl below Brent.

In 2015, world oil demand is anticipated to rise by 1.15 mb/d, following an upward revision of 30 tb/d due to expectations of higher oil requirements in OECD America and Other Asia.