Petrobras requirements for sour service subsea pipelines

Oil and gas exploration in the pre-salt area demands knowledge of the corrosive properties of the materials before they are selected for the subsequent production, processing and transportation systems. These materials need to be resistant to a variety of environmental conditions such as high concentrations of H2S and CO2 gases, which are derived either from the hydrocarbons produced from the reservoirs or generated through the biogenic acidification of the blocks. Petrobras requires material qualification for its projects in sour service, meeting the requirements of relevant DNV, NACE and ISO standards. This paper will present a general view of sour service requirements utilized by Petrobras to meet cost and safety needs. (AU) © CBMM