Enauta's offer follows that of PetroReconcavo. : The deals scene in Brazil’s oil patch is heating up after a second producer made an offer for a merger with 3R Petroleum Oleo e Gas SA, sending its shares soaring. Enauta Participacoes SA said Tuesday that a combination with 3R would create a company with a production potential of more than 100,000 barrels a day of oil and natural gas. 3R already is considering a potential combination with PetroReconcavo SA, another Brazilian oil producer that has oil fields on land.