Washington: Organisation of the Petroleum Exporting Countries’ (Opec’s) power to help lift oil prices by curbing output will be tested by the ability of shale-oil producers and other unconventional suppliers to ramp up production, the World Bank said.

Crude prices have surged more than 7 per cent since September 28, when the Opec agreed to limit production for the first time in eight years. The group includes 14 major oil producers, from Saudi Arabia to Iran and Nigeria. A global supply glut has caused oil prices to slump over the past two years.

But the rise of non-traditional sources of supply, in particular oil extracted from US shale deposits, will constrain Opec’s ability to control prices, the World Bank said on Thursday in its latest commodities-market outlook. Shale drillers benefit more from shorter production cycles than conventional suppliers, and shale development costs have fallen significantly, according to the Washington-based development lender.

“Should Opec and other producers succeed in restraining production and lifting prices meaningfully, investment in oil production and non-Opec supply would likely rise — especially in view of the flexible nature of shale oil production,” the World Bank said. “This is likely to test Opec’s ability to lift oil prices in the medium term.”

Oil details

Opec is expected to announce the details of the deal at a meeting on November 30. Iran, Libya and Nigeria will likely be exempted from the agreement due to earlier production losses, the World Bank said.

History shows agreements to curb commodity production have a limited shelf life, the World Bank said. Since the Second World War, countries have struck deals to suppress output of everything from tin and coffee to natural rubber. Many of the agreements were supported by laws governing exports and inventory management.

“However, these laws proved to be the agreements’ undoing,” the World Bank said. “Over the long term, price and trade restrictions imposed by some of the agreements either encouraged the emergence of competitor products, such as aluminium for tin, or the entry of new producers.”

The World Bank raised its forecast for crude oil, projecting prices will reach $55 (Dh202) per barrel next year from an average of $43 per barrel this year. The development lender previously predicted prices would rise to $53 per barrel in 2017.

The higher forecast reflects the likely impact of Opec’s decision to curb production, according to the World Bank. Supply disruptions among key producers and stronger-than-expected Opec cuts could push prices higher, although prices could end up lower if output is higher than expected or growth in emerging markets falters, the bank said.

The bank’s forecast is a composite of projections for the Brent, West Texas Intermediate and Dubai Fateh blends.

The World Bank also raised its forecast for non-energy commodities, with prices now expected to rise 2.1 per cent next year after slumping 3.1 per cent this year. The increase will be led by a surge in prices of metals such as zinc, lead and tin, the development bank said.