Brazil’s state-owned energy giant Petrobras has notched a new production milestone, with one of its oil fields surpassing 4 billion barrels of cumulative output as the pre-salt, now entering its third decade, cements its status as the company’s production powerhouse in Brazilian waters. The post 73 years in the making: Petrobras’ oil field exceeds 4 billion barrels as Brazil’s pre-salt turns 20 appeared first on Offshore Energy .