BRASILIA, Feb 23 (Reuters) - Prosecutors at Brazil's federal audit court, known as the TCU, are seeking to block state-controlled oil company Petrobras from replacing its chief executive officer as announced by President Jair Bolsonaro.

According to a document seen by Reuters on Tuesday, the prosecutors said they want to investigate whether the shake-up at Petrobras is motivated by the personal political interests of Bolsonaro as he plans to run for re-election in 2022.

(Reporting by Ricardo Brito, writing by Anthony Boadle; Editing by Chizu Nomiyama)