 |
Monday, March 17, 2008 - 1:05 PM
Convention Center, Second Level, R04 (Ernest N. Morial Convention Center)
08507
Corrosion Inhibition in Produced Water Re-Injection Systems that Use Nitrate Treatment to Control SRB Activity and Reservoir Souring
Nitrate treatment is increasingly used for selective control of sulfate-reducing bacteria (SRB) and associated biogenic generation of hydrogen sulfide. Nitrate is now widely added to seawater injection systems to mitigate reservoir souring. The use of nitrate in seawater injection has not been observed to increase corrosion rates of carbon steel and there is some evidence that it may actually reduce corrosion. However, in produced water re-injection (PWRI) systems the situation with respect to corrosion is more unpredictable and nitrate treatment has sometimes been associated with increased general and localised corrosion.
A laboratory-testing programme has been conducted to investigate the possibility of using corrosion inhibitors to prevent this potential problem. A total of six corrosion inhibitors were evaluated. Both the general corrosion and pitting corrosion rates were measured in the presence of biofilm, containing a high nitrate-reducing bacteria (NRB) population.
Determinations were made by electrochemical measurements supported by microscopic examination of electrode surfaces after test completion.
See more of Microbiologically Influenced Corrosion
See more of Technical Symposium
See more of The CORROSION 2008 Conference and Expo (March 16-20, 2008)
See more of Technical Symposium
See more of The CORROSION 2008 Conference and Expo (March 16-20, 2008)