Brent crude futures were down 60 cents at $39.13 a barrel at 1058 GMT, bouncing slightly from a session low of $38.90. West Texas Intermediate (WTI) US crude futures were at $36.26 a barrel, down 50 cents after touching $36.12, their lowest since February 2009.
Varga said there was room to fall further, with little support likely until oil reached the 2008 lows of $36.20 a barrel for Brent and $32.40 a barrel for WTI.
Prices have tumbled this month after Opec failed to impose a ceiling on output. Opec producers pumped more oil in November than in any month since late 2008, some 31.7 million barrels per day.
"Consumption is likely to have peaked in the third quarter and demand growth is expected to slow to a still-healthy 1.2 million bpd in 2016, as support from sharply falling oil prices begins to fade," the IEA said in its monthly report.
Should sanctions on Iran be lifted, its exports could rise, adding to the market's oversupply. Still, the IEA said the pace of stock-building should roughly halve next year and that it was very unlikely that global storage capacity would be filled.
"Concerns about reaching storage capacity limits appear to be overblown," it said. The IEA said it expects a decline in non-Opec production in 2016, as US light tight oil shifts into contraction, and it that further spending cuts could spur deeper output declines.
"There is evidence the Saudi-led strategy is starting to work," the IEA said, referring to the producer group's decision to maintain high output to safeguard market share.
US shale oil production, the main driver of non-Opec supply growth, is expected to fall for a ninth consecutive month in January, a forecast from the US Energy Information Administration showed this week.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
)