Is Souring and Corrosion by Sulfate-Reducing Bacteria in Oil Fields Reduced More Efficiently by Nitrate or by Nitrite?
Why this work is in the frame
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Bibliographic record
Abstract
Abstract Successful application of both nitrate and nitrite to combat souring in oil fields has been reported. The effect of these treatments on corrosion is not well documented. Using up-flow, packed-bed bioreactors simulating an oil field we have found that both nitrate and nitrite are effective sulfide removers. The required dose depended on the concentration of oil organics used as the energy source by the microbial community. Because of its higher oxidative power, nitrate can remove more oxidizable oil organics than nitrite. However, nitrite is a strong SRB inhibitor. Nitrate gives less SRB inhibition, because it is only partially converted to nitrite. Because iron corrosion is either not affected or increased by the presence of nitrate, but strongly inhibited by nitrite under our experimental conditions we conclude that use of nitrite is on balance more favorable than use of nitrate.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it