The production of hydrogen sulfide within oilfield systems can result in severe operational and health
and safety issues. Hydrogen sulfide can be produced by both abiotic (chemical) or biotic
(microbiological) mechanisms. Biotically produced hydrogen sulfide is caused by the proliferation of
sulfate reducing bacteria (SRB) and successful treatment programmes need to target both the causative
organism and remove or mitigate the secondary effects of SRB activity, i.e. iron sulfide deposition and
particulate stabilised emulsions.
This paper will describe the use of THPS and, in particular, new generation THPS formulations, as a
holistic approach for treating sour systems by controlling SRB, dissolving iron sulfide deposits and
removing particulate iron sulfide from produced fluids to facilitate demulsification processes.