Two Chinese companies that entered Brazil’s giant deep-water oilfields two years ago are now looking to increase their presence as state-run Petrobras sells assets to pay down debt, said two people with knowledge of the matter.
China Petroleum & Chemical Corp., or Sinopec, and Cnooc Ltd. are among companies interested in buying stakes in so-called pre-salt offshore exploration blocks, the people said, asking not to be identified because talks are private.
Brazil Energy Insight 
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