Oil extends gains as Opec prolongs production curbs through 2018

Oil extended gains after a third monthly advance as the Organisation of Petroleum Exporting Countries (Opec) agreed to prolong production cuts through to the end of 2018 in an effort to drain a global glut.

Futures added 0.3% in New York after rising 0.2% on Thursday. The nine-month extension was beefed up through the inclusion of Nigeria and Libya, two Opec members originally exempted from the curbs. By keeping the 1.8 million barrels a day of cuts in place, the group aims to return stockpiles to their five-year average without overheating the market.

Oil has climbed about 21% since the start of September on tightening supplies and expectations Opec and its allies would prolong cuts past the end of March.

US output expanded to another record last week, highlighting the challenge ahead for Opec and Russia as shale producers ramp up production amid rising prices.

"It’s good to have Nigeria and Libya in the fold, but the market reaction has been fairly muted given the outcome was largely expected," said David Lennox, a commodity analyst at Fat Prophets in Sydney.

"The focus now is on US output. We’re not going to see the oil price rally too much further because when it rises, we see much more activity from the US producers."

West Texas Intermediate for January delivery was at $57.57 a barrel on the New York Mercantile Exchange, up 17 cents, at 3pm in Hong Kong. Total volume traded was about 20% below the 100-day average.

Prices rose 10 cents to $57.40 on Thursday, capping a 5.6% gain for November.

Brent for February settlement climbed 26 cents to $62.89 a barrel on the London-based ICE Futures Europe exchange. The January contract expired on Thursday after adding 0.7%, to $63.57.

The global benchmark crude was at a premium of $5.28 to February WTI.

US oil production may climb by another 1 million barrels a day before the end of 2018 after the extension of the Opec-led cuts, according to Barclays. There is a "clear upside risk" to further output gains if current prices persist, the bank said.

The nation pumped 9.68 million barrels a day last week, the highest level in more than three decades, according to government data.