Offshore staffRIO DE JANEIRO – Petrobras as started an extended well test in the Brava area of the Campos basin presalt Marlin field production concession. The test is expected to run for two years with output of 6,000 b/d of oil from well 6-MRL-199-RJS connected to the P-27 platform. Petrobras says the extended test will provide information about the reservoir characteristics to help define the production development project. 04/19/2011