Brazil's Petrobras workers appear to have agreed a five-day strike just as the government announced a report suggesting worldwide oil companies will help investments in the oil province reach $133 billion by 2016, it was learned Tuesday.

The optimistic Energy and Mines Ministry announcement was clouded by a report from news agency BNAmericas that a strike planned for July would stop Petrobras's domestic production.

Petrobras's 10-year-plan for expansion includes the planned purchase of much North Sea technology and extensive exploration and production spending. Foreigners are seen investing up to $55 billion over 10 years, as the Brazilian economy's four percent annual growth provides a strong domestic hydrocarbon market.

The National Petroleum Agency report says Brazilian production will rise to three million barrels per day by 2015, or three-times Norwegian production. By year-end, Petrobras expects to produce 1.9 million bpd.