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Aquateam COWI - Environmental Consultancy Specialising in Water-Related Services Case Studies

Aquateam COWI - Environmental Consultancy Specialising in Water-Related Services

Souring and Microbial Influenced Corrosion in Produced Water Re-Injection Systems - Challenges and Control Strategies Produced water re-injection (PWRI) into petroleum reservoirs presents a potent water management solution and may become obligatory for the exploration and production of oil and gas in environmental sensitive areas, such as in the Arctic, the Barents Sea and the Caspian Region. A key challenge to PWRI implementation is reservoir souring (RS) caused by the production of sulphide in the reservoir by sulphate reducing prokaryotes (SRP).
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A Holistic Approach To Examine Microbially Influenced Corrosion In PWRI Based Systems The impact of nitrate on reservoir souring mitigation and microbially influenced corrosion (MIC) has been investigated in laboratory scale bioreactors. The aim is to link microbial structure and function of biofilms on metal coupons with corrosion damage, metallography, and deposit data. Preliminary results show distinct differences in structure and activity of nitrate-treated relative to control biofilms. Microprofiling studies show strong vertical redox gradients in both nitrate treated and control biofilms, indicating the presence of reducing processes at the metal surface.
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A Review of PWRI experience: Souring Mitigation, MIC Control and Monitoring TEKNA Produced Water Management Conference 2011, Stavanger, Norway.
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