Companies Petroleo Brasileiro SA Petrobras FollowHOUSTON, Jan 27 (Reuters) - The new Chief Executive of Brazil's Petrobras, Jean Paul Prates, has picked geologist Mario Carminatti to head the oil company's exploration and production division, people with knowledge of the information said on Friday. Petrobras said in a securities filing it had not received official statements regarding the nomination of any executive. He won praise for the pre-salt discovery, pressing on with drilling though the salt barrier that alone was deeper than any well that Petrobras, the world's leader in deep-water exploration, had drilled before. The pre-salt area is now responsible for more than 70% of Brazil's daily production of near 4 million barrels of oil and gas. Carminatti is currently involved in an almost $3 billion exploration effort in a new frontier North of Brazil, the Equatorial Margin.

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