For the modern oil and gas production, it is characteristic a significant increase in the number of fields and wells, where produced fluids contain large amounts of hydrogen sulfide (H2S) relict as well as biogenic. The dissolved H2S in produced water is a stimulant of extensive corrosion damages of metal oilfield equipment, which leads to accidents, frequent unscheduled shutdowns of equipment, its repair and, ultimately - a huge material and financial losses for oil and gas companies. In connection with the above, the problem of removal of H2S from the produced fluids and marketable products is very relevant for the oil and gas companies.
For example, crude oil from the H2S is removed by heating or alkali neutralization reagents; when gas purification is often used stationary installation, in which gas is passed through H2S absorbent solutions with subsequent regeneration.
Directly on the fields of H2S removal is the most appropriate using chemical method with non-regenerative H2S scavengers. These scavengers react with the mercaptans and H2S contained in the produced fluids (like water and oil, or gas phase) to form a water-soluble, stable, non-toxic products.
Application technologies and injection points non-regenerative H2S scavengers in the production and preparation system for oil and gas depend on the individual characteristics of the object where they apply. Optimal doses of scavengers depend on the amount of H2S, which is in the fluids to be purified, but usually at least 5 ÷ 8 ppm of a reagent per 1 ppm of H2S. The brands' range of non-regenerative H2S scavengers, which could be found in today's market is wide enough. But, despite the apparent diversity, an active part of the majority of them are balanced compositions of derived light amines, ethanol amines, alcohols, glycols and aldehydes. World experience shows that the usage of effective non-regenerative H2S scavengers can significantly reduce the hydrogen sulphide amount in the produced fluids as well as in marketable products of oil and gas companies, which allows companies to solve economic, environmental and social issues with minimum material and financial costs.