Journal
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
Volume 43, Issue 9, Pages 792-797Publisher
SOC CHEMICAL ENG JAPAN
DOI: 10.1252/jcej.10we012
Keywords
Souring; Microbiologically Influenced Corrosion; Oil Field; Sulfate-Reducing Bacteria; dsrAB
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Funding
- JOGMEC (Japan Oil, Gas and Metals National Corp.)
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The water samples collected from two non water-flooded oil fields contained a variety of organic acids, sulfate-reducing bacteria (SRB) and little sulfate. Acetate and propionate were the major components of organic acids. Over 6 weeks of artificial souring experiment, a maximum of 3 mM of sulfide was produced when oil field water was mixed with seawater at 25 degrees C. Propionate was completely consumed under soured conditions. This indicated that the propionate-consuming SRB underwent souring in this experiment. Significant cell growth was confirmed at 25 degrees C with no relation to souring. The dominant SRB species were shifted from Desulfomicrobium thermophilum to Desulfobacter vibrioformis and uncultured Desulfobacter.
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