(Bloomberg) -- Malaysia’s Petroliam Nasional Berhad is working with Bank of America Corp. to sell its 50% stake in the Brazilian oil field Tartaruga Verde, according to people familiar with the matter. 

Petronas, as the Kuala Lumpur-based company is known, is looking to get about $1 billion for the stake, the people said, asking not to be identified discussing non-public information. The discussions are at an early stage and a deal may not happen, the people said.

A representative for Bank of America declined to comment. Petronas didn’t immediately respond to a request for comment.

Petronas bought the stake in the Tartaruga Verde oil field in 2019 as part of a bigger transaction with Petroleo Brasileiro SA, known as Petrobras, which still owns the remaining 50% stake. The field is based in the deep waters of Campos Basin in Rio de Janeiro state.