Abstract

Need for H2S stripping at field facilities is dictated by the requirements of GOST R 51858-2002 standard which limit H2S content in sales oil by 100 and 20 ppm. This is a pressing challenge for TATNEFT Company since in previous years it transferred over 16 mln tonnes of oil per year to PJSC Transneft with H2S concentration over the acceptable limits. To select the best technologies for H2S removal from oil, a differential approach has been used to consider operating conditions at all field facilities. An optimum H2S stripping method has been selected for each facility with due regard for its effective application environment. Adjustment and optimization of oil treatment plant operational parameters provided the required oil quality at minimal costs.

H2S stripping method has been used at seven facilities. Hot vacuum oil separation technology has been used at Bavlyneft’s oil treatment facility, and technology of direct H2S oxidation with ambient oxygen in the presence of ammonia solution with phthalocyanine catalyst has been used at Kutema sour crude oil treatment facility of NGDU Nurlatneft. H2S scavengers are used for treating oil from Andreevka and Kamenka sour crude oil treatment facilities and for advanced treatment of oil after vacuum separation at Bavlyneft’s oil treatment unit. Implementation of these technologies at TATNEFT’s assets has allowed to reduce H2S content in oil that is transferred to the central metering station to less than 100 ppm.

Key words:

hydrogen sulphide, oxygen, vacuum, stripping column, chemicals, hydrocarbon gas, H2S scavenger

References

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Authors

D.D. Shipilov, PhD, TatNIPIneft–PJSC TATNEFT
32, Musa Jalil st., Bugulma, 423236, Russian Federation
E-mail: shipilov@tatnipi.ru

A.N. Shatalov, PhD, TatNIPIneft–PJSC TATNEFT
32, Musa Jalil st., Bugulma, 423236, Russian Federation
E-mail: shatalov@tatnipi.ru

R.M. Garifullin, TatNIPIneft–PJSC TATNEFT
32, Musa Jalil st., Bugulma, 423236, Russian Federation
E-mail: garifullin@tatnipi.ru

V.V. Soloviev, TatNIPIneft–PJSC TATNEFT
32, Musa Jalil st., Bugulma, 423236, Russian Federation
E-mail: svv@tatnipi.ru

For citation:

D.D. Shipilov, A.N.Shatalov, R.M. Garifullin, V.V. Soloviev Tehnologii ochistki nefti ot serovodoroda na ob#ektah PAO «Tatneft'» [Hydrogen sulphide stripping technologies used at TATNEFT’s assets]. Neftyanaya Provintsiya, No. 4(24), 2020. pp.206-216. DOI https://doi.org/10.25689/NP.2020.4.206-216 (in Russian)