Brazilian politicians have a long track record of meddling in the country’s oil and gas sector, particularly on the thorny topic of fuel prices. And with Brazil's presidential elections just around the corner, there are fears that a change in government will bring a new energy agenda.

Brazilians are set to cast their ballots on 2 October, and recent polls have suggested that former president Luiz Inacio Lula da Silva — commonly known as Lula — is leading by a comfortable margin but capturing less than the 50% of the vote he would need for an outright win in the first round.