The efficient reduction and removal of hydrogen sulfide (H2S) from produced fluids is an important technology that can have great impact on oil and gas operations. Hydrogen Sulfide is increasing in many production streams as water content rises. Not only can the export of gas be halted if H2S reaches too high a level, but employee safety and the environment are also influenced by rising H2S concentrations. In colder climates such as Alaska, facilities are predominantly enclosed which necessitates careful monitoring of H2S to maximize personnel safety. Burning of produced gas as fuel creates sulfur dioxide which is under strictly enforced limits. One of the more operationally attractive ways of minimizing H2S is via the addition of chemical scavengers directly to production containing oil, water, and gas. Acrolein (2-propenal) is evaluated in this manner on the North Slope. Although the sulfide scavenging ability of acrolein is well known to some production companies, this product has not been previously evaluated in North Slope operations. The results from a field test indicate that acrolein scavenges H2S rapidly at a low treating ratio. Approximately 65% of the total H2S was removed in less than two minutes from the production stream of one producing well making water, oil and gas, at a 1:1 molar ratio of acrolein:H2S. From the same wellhead injection point, it is further demonstrated that additional downstream production entering the pipeline system can be effectively treated. Reaction byproducts are completely soluble and stable, there are no stream upsets, and no acrolein residuals are detected downstream.

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