LONDON — The energy giant BP said on Tuesday that it expected to take an additional charge of $1.7 billion in the fourth quarter for claims related to the 2010 Deepwater Horizon disaster, which killed 11 people and caused the worst oil spill in American history.

The company also said that it now anticipated cash payments related to the disaster to be about $3 billion this year, up from an estimate issued in the third quarter of more than $2 billion.

“With the claims facility’s work very nearly done, we now have better visibility into the remaining liability,” Brian Gilvary, BP’s chief financial officer, said in a news release. “The charge we are taking as a result is fully manageable within our existing financial framework.”

The explosion of the Deepwater Horizon oil rig was one of the worst environmental disasters in United States history, spilling millions of gallons of crude oil into the Gulf of Mexico. It badly damaged BP’s reputation and has cost the company tens of billions of dollars in fines and settlements.