Injection of nitrate or nitrite into oil reservoirs can reduce the sulfide concentration through the activity of nitrate-reducing, sulfide-oxidizing bacteria. These inhibit sulfate-reducing bacteria (SRB), but appear to contribute also to increased corrosion risk. Combinations of nitrate or nitrite with other inhibitors can work synergistically in inhibiting SRB activity.

Subject
Hydrogen sulfide, Nitrites, Sulfates, Nitrates, Sulfide concentration, Desulfovibrio, Bacteria, Corrosion inhibitors, Oilfields, Produced water, Sulfides, Biocides, Risk reduction
Keywords:
souring, SRB, nitrate injection, nitrite inhibition, corrosion, molybdate
Government work published by the Association for Materials Protection and Performance (AMPP) with permission of the author(s). Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2002
GOV
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