BP is the UK's largest oil company
BP has seen its latest quarterly profits more than double, buoyed by record high oil prices.
Reporting its results for the three months from July to September, BP's replacement cost profit totalled $10bn (£6.4bn), up 148% from a year earlier.
Oil prices hit an all-time high of $147 a barrel in July, but have since fallen back sharply to about $62 this week.
BP said high prices had "obviously helped our absolute result", despite the recent sharp fall.
BP chief executive Tony Hayward said that oil prices could decline further as the world enters a recession.
Analyst Charlie Parker thinks BP's profits will decline in the next quarter
"I believe that BP is well-positioned to cope with such volatility," he said.
"We think the current turmoil may in fact create opportunities for us and we will look at those very closely."
Shares in the firm were up 2.6% in early Tuesday trading in London.
Replacement cost profit is the reporting measure typically used by oil companies and reflects the current cost of supplies.
The measure strips out gains or losses related to any changes in the value of the firm's stock of fuel products.
BP's upstream operations - its oil production business - made an underlying pre-tax profit of $11.5bn, up 82.5% from a year earlier.
This included a profit of $849m from BP's troubled TNK-BP Russian joint venture.
BP's downstream operations - its refining and petrol sales business - made an underlying pre-tax profit of $1.3bn, up 70% from the same period last year.
Despite benefitting from the high price of oil, BP said it had also benefited from "very real operational improvements in refining and rigorous cost control across the company".
BP also saw overall production levels rise slightly from a year earlier, despite commentators predicting a minor fall.
Analyst Tony Shepard of Charles Stanley said BP's results were "way above the market expectations".
Richard Hunter, head of UK equities at Hargreaves Lansdown Stockbrokers, was equally impressed.
"These numbers have comfortably surpassed the top end of expectations and reiterate BP's position as a true oil major."
BP's Russian joint venture TNK-BP has been dogged by a power struggle this year.
The dispute between BP and the group of Russian billionaires that control the other 50% of the business led to the departure of former TNK-BP chief executive Robert Dudley last month.
Mr Dudley said he had faced "sustained harassment".
The Russians, who owned their stake in TNK-BP through a consortium known as Alfa Access Renova, had accused Mr Dudley of favouring BP.
Mr Dudley's departure came as BP signed an agreement aimed at ending the dispute that will include the appointment of three independent directors.