This excerpt taken from the PBR 20-F filed May 22, 2009.
Argentina, where we participate across the energy value chain. In Argentina, we own the Pichi Picún Leufú hydroelectric plant, the gas-fired thermoelectric plant Genelba, an interest in natural gas transportation company TGS (Transportadora Gas del Sur), and interests in energy marketer Edesur, and Mega Company, a natural gas separation facility. We also own through our interest in PESA four petrochemical plants (three in Argentina and one
in Brazil), two refineries providing 81 mbbl/d of net capacity, and an interest in the Refinor/Campo Duran Refinery. We own 644 retail service stations operating under the brand names Petrobras.
This excerpt taken from the PBR 6-K filed Nov 12, 2008.
c.3) In Argentina
On September 29, 2008, the conclusion of the acquisition by PESA in Argentina of 25,67% of the assets of the Sierra Chata blocks, already producing natural gas, and of 52,37% of the assets of Prava Negra, in the exploration stage, from ConocoPhilips for the total amount of US$ 77 million, increased primarily of changes in working capital.