BP suffered a 40% drop in third-quarter earnings as it was hampered by cheap crude oil prices.
The oil giant's underlying replacement cost profit for the quarter came in at 1.819 billion US dollars (£1.185 billion), compared with 3.037 billion US dollars (£1.979 million) a year ago.
BP said the drop was a result of sharply lower oil and gas prices, which have more than halved to 50 dollars a barrel - compared with around 100 dollars 12 months ago.
The firm also revealed that its total bill for the Deepwater Horizon oil spill has now hit 55 billion dollars (£35.85 billion), and warned costs could yet rise further.
"The total amounts that will ultimately be paid by BP in relation to the incident will be dependent on many factors," it said.
"These could have a material impact on our consolidated financial position, results and cash flows."
Looking to the fourth quarter, BP said it expected production to be slightly higher than the third quarter thanks to planned seasonal turnaround activity.
The oil giant announced a quarterly dividend of 10 cents per ordinary share, which is expected to be paid on December 18. The corresponding amount in sterling will be announced on December 7, it added.