In this paper a general H2S decision strategy, describing the types of information which should be gathered and decisions to be made addressing an existing H2S problem, or new field development is presented.

Taking H2S into consideration in initial facility design, types of monitoring of H2S that should be carried out during field development and exploitation will be discussed. The usefulness of computer phase modelling, including equation of state calculations, to determine H2S concentrations in all phases from reservoir through the production stream will also be described. From quantification of the souring problem it can then be decided if, and where in the production stream, the use of sulfide scavengers is required. A laboratory based testing procedure will be presented, along with experimental data.

In addition to consideration of the basic chemistry, results of an industry survey will be presented on the best applications for commmercial sulfide scavenging products.

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