RIO DE JANEIRO, Aug. 26 (Xinhua) -- Brazil's state-owned oil and gas giant Petrobras signed an agreement Tuesday to charter a platform ship from Japane's Mitsui Ocean Development & EngineeringCo., or Modec.

    According to the agreement, the Tokyo-based provider of floating production systems will deliver the floating production and storage facility at the end of 2010. The ship will operate in Brazil's Tupi mega field for 15 years, and the agreement can be extended for another five years.

    No information was disclosed about the amount of money involved in the deal.

    Modec said the platform, named Angra dos Reis after a town on the coast of Rio de Janeiro state, will be built from an old oil ship, Sunrise IV, and will have a production capacity of 100,000 barrels of oil and 3.2 million cubic meters of natural gas per day.

    Petrobras intends to drill a total of five wells in the Tupi field, the first pre-salt layer oil field to be exploited in Brazil. A long-term test is scheduled to start in March 2009, although its exploitation conditions have yet to be determined by the government.

    Discovered in 2007, the Tupi mega field is said to contain 5 billion to 8 billion barrels of recoverable light oil.