Three leading US shale oil producers have announced steep cuts in their planned capital spending, as they set their budgets to respond to the collapse in crude prices.

During the next eight days, independent U.S. oil explorers are expected to report 2015 losses totaling almost $14 billion, the result of the steepest price collapse in a generation.

European stocks deepened a monthly rout as disappointing earnings reports reignited investor concern about global growth prospects and oil prices resumed their downward trend.

British wholesale gas prices have fallen over 40 percent in the past year, as mild winter temperatures softened demand amid a sell-off in crude oil markets to which seasonal gas contracts are indirectly linked, and pressure has been mounting on power companies to lower retail prices for households.

With China's economy growing at its slowest pace in a generation and Asia's trading powerhouses Japan and South Korea struggling to create growth, Asian fuel oil demand for container ships should stagnate in 2016, putting more pressure on a market that struggled last year.

"The simple fact is that the accepted oil narrative has become uniformly negative," he said. "Prices will eventually have to move to a level that creates supply rather than destroys it.... We believe that price to be well above current levels."

Last month, David Rubenstein, a founder of private-equity firm Carlyle Group, said he anticipates “maybe the greatest energy investing opportunities we’ve ever seen.” Marc Lasry, founder of hedge fund Avenue Capital, has described energy as a “once-in-a-lifetime opportunity.”

The average natural gas spot price at the benchmark Henry Hub for December 2015 of $1.93 per million British thermal units (MMBtu) was the lowest monthly average since March 1999. EIA expects natural gas prices to rise, averaging $2.65/MMBtu in 2016 and $3.22/MMBtu in 2017. Expected price increases reflect consumption growth, mainly from the industrial sector, that outpaces near-term production growth.

"Demand will grow, as it has already started in 2015, and there will be a period not far into the future (when) demand will catch up with supply,"

"The practice of filling the market with cheap oil at any cost is wrong -- half a year or a year later it could be sold at twice as high," Leonid Fedun, vice-president of Lukoil, Russia's second largest oil producer, was quoted as saying.