BP's fourth-quarter earnings plunged 91 percent amid sharp declines in oil prices as the British energy company continued to make provision for the Deepwater Horizon disaster in the Gulf of Mexico and streamline operations.

The company reported Tuesday that underlying replacement cost profit fell to $196 million from $2.2 billion in the same quarter a year earlier. The figure is an oil industry accounting standard that includes fluctuations in the price of oil and excludes one-time items.

"It's going to be a very turbulent year for our industry," CEO Bob Dudley said as he opened a new conference in London.

Oil companies are slashing jobs and delaying investments as crude prices plummet. Brent crude, the benchmark for internationally-produced oil, fell 34 percent last year and hit a 12-year low of $27.10 a barrel in January. It traded at $34.13 on Monday, having been above $100 a barrel as recently as September 2014.

The company also set aside an additional $443 million in the quarter to cover costs related to the Deepwater Horizon oil spill in the Gulf of Mexico in 2010. Charges for the spill now total $55.5 billion.

BP stock fell sharply on the news by early afternoon, dropping nearly 9 percent to 335.10.

Yet Dudley took the numbers in stride, arguing that the markets had failed to take into account a robust $5.8 billion operating cash flow for the quarter. The company also said it was taking steps to streamline redundant systems put in place for legal reasons after the spill and that operations would simplified.

"We have our confidence back now," he said.

The company said it reduced controllable cash costs by $3.4 billion last year, and estimated future cuts at almost $3.6 billion. It forecast asset sales of as much as $5 billion this year.

BP also announced 3,000 job cuts globally by the end of 2017. That is in addition to 4,000 cuts planned in exploration and production — including some 600 in North Sea operations. European rival Royal Dutch Shell, which reports earnings later this week, told investors in January that streamlining and integration from a planned merger with British gas producer BG Group would claim some 10,000 staff and contractor jobs across both companies.

BP said its net loss narrowed to $3.3 billion from $4.4 billion a year earlier.

Oil prices have plunged because global supply is high at a time when consumption is growing more slowly than expected, particularly in China.

OPEC members, meanwhile, are refusing to cut production for fear of losing market share to non-members like the U.S. and Russia. And Iran is looking to start pumping more after decades of sanctions.

BP is supported somewhat during the current price slump by higher margins at its downstream business, which includes refining and selling fuels. But that's not enough to offset the broader impact of the market drop.

Dudley said he expected a tough 2016, particularly in the first half.

There are few predictions that oil prices will bounce back quickly — some analysts have forecast they will drop to near $10 a barrel before rebounding.

And that means lots of uncertainty.

"I expect continued layoffs, restructurings, and consolidated among oil and gas companies," said Gianna Bern, associate teaching professor of finance at the University of Notre Dame. "We are witnessing the perfect storm in this industry."