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Mitigation of Sour Corrosion Using Novel Fast Acting Hydrogen Sulfide Scavengers

A new experimental apparatus to evaluate H2S scavengers. Enables an assessment of scavenger efficiency and kinetics. Laboratory results are presented for a new, fast-acting H2S scavenger that is similar, but not identical, to previously described fast-acting H2S scavengers.

Product Number: 51317--9446-SG
ISBN: 9446 2017 CP
Author: Sunder Ramachandran
Publication Date: 2017
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The choice of metallurgy resistant to hydrogen sulfide- (H2S) induced localized corrosion (sulfide corrosion cracking) is dependent on the concentration of hydrogen sulfide. As these concentrations increase one may need to use more expensive metallurgy. Changes in reservoir conditions cause increase in hydrogen sulfide concentration that make it unsafe to transport production fluid in existing facilities. One method to reduce hydrogen sulfide concentrations is to use hydrogen sulfide scavengers.Hydrogen sulfide scavengers such as triazines are basic and can cause scaling. Traditional scavengers like triazine exhibit low thermal stability and often require large residence times to react. New fast-acting high temperature hydrogen sulfide scavengers have been developed by the authors. This paper will describe new experimental apparatus to evaluate hydrogen sulfide scavenger candidates at high temperatures. The methodology enables an assessment of scavenger efficiency and kinetics.Field test results of the new scavenger are shown for mixed production applications at high temperatures.

Keywords: Hydrogen Sulfide Scavenger, Non-Triazine based, Fast Acting, High-Temperature Stable, Sulfide Stress Corrosion

The choice of metallurgy resistant to hydrogen sulfide- (H2S) induced localized corrosion (sulfide corrosion cracking) is dependent on the concentration of hydrogen sulfide. As these concentrations increase one may need to use more expensive metallurgy. Changes in reservoir conditions cause increase in hydrogen sulfide concentration that make it unsafe to transport production fluid in existing facilities. One method to reduce hydrogen sulfide concentrations is to use hydrogen sulfide scavengers.Hydrogen sulfide scavengers such as triazines are basic and can cause scaling. Traditional scavengers like triazine exhibit low thermal stability and often require large residence times to react. New fast-acting high temperature hydrogen sulfide scavengers have been developed by the authors. This paper will describe new experimental apparatus to evaluate hydrogen sulfide scavenger candidates at high temperatures. The methodology enables an assessment of scavenger efficiency and kinetics.Field test results of the new scavenger are shown for mixed production applications at high temperatures.

Keywords: Hydrogen Sulfide Scavenger, Non-Triazine based, Fast Acting, High-Temperature Stable, Sulfide Stress Corrosion

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