ExxonMobil, Chevron, Shell, BP, and Total all won oil exploration blocks offshore Brazil in the first of three bidding rounds this year which fetched a record total amount of signing bonuses. The 16th oil concession bidding round held on Thursday raised a total of US$2.17 billion (8.9 billion Brazilian reais) in signing bonuses, a record for the concession rounds in Brazil, oil regulator ANP said in a statement. The regulator expects the bidding round to result in investments of at least US$385 million (1.58 billion reais) only in the first, exploration,…