Environmental assessment of the impact of the Lyantorskoye oil field development on the geochemical state of surface waters

UDK: 502.6: 622.276.5
DOI: 10.24887/0028-2448-2021-10-136-139
Key words: Lyantorskoye oil-gas-condensate field, surface waters, bottom deposits, ecological monitoring
Authors: A.М. Soromotin (Tyumen Branch of SurgutNIPIneft, Surgutneftegas PJSC, RF, Tyumen), А.Yu. Solodovnikov (Tyumen Branch of SurgutNIPIneft, Surgutneftegas PJSC, RF, Tyumen)

The process of oil production is accompanied by the impact on all components of natural environments: atmospheric air, soil and vegetation cover, surface waters, including bottom sediments. In the conditions of the Middle Ob region, with its high degree of swampiness and lakes, it is the bog-lacustrine ecosystems that are the most vulnerable in the course of human economic activity. This also applies to the territory of the Lyantorskoye oil and gas condensate field, developed since 1978, in the landscape structure of which lake-bog complexes occupy almost 80% of the territory. At long-term developed fields, primarily those whose exploitation began in the Soviet period, background observations of the state of natural environments, including surface water and bottom sediments, were not carried out. This gap was filled only in the post-Soviet period, and at the beginning of the 21st century, hydrochemical studies became regular with the determination of a large number of pollutants. The Lyantorskoye field, like other long-term developed fields, is also covered by annual hydrochemical studies with a large number of determined components in 10 watercourses. The results of these studies are presented in the article. As a result of the analysis of the current state of the surface waters of the Lyantorskoye field, it was established that the presence of phenols, biogenic substances, heavy metals and other chemical substances in the surface waters, the content of which exceeds the established maximum permissible concentrations. This is typical not only for the rivers of this field, but also for other watercourses in the territory of the Khanty-Mansiysk Autonomous District - Yugra, where hydrocarbon production is not carried out. The noted is associated with the natural features of the area and the processes taking place in the bowels of the earth. Analysis of the research results indicates that the long-term operation of the Lyantorskoye field did not have a visible effect on the hydrochemical state of surface waters and bottom sediments of the field's streams. The increased content of some pollutants is caused not only by technogenic factors, but by the natural features of the taiga zone of Western Siberia.

References

1.  Shubaev L.P., Surgut Polesye of West Siberian Lowland (In Russ.), Izvestiya VGO SSSR = Proceedings of the Russian Geographical Society, 1956, T. 88, no. 2, pp. 167–169.

2. Liss O.L., Abramova L.I., Avetov N.A. et al., Bolotnye sistemy Zapadnoy Sibiri i ikh prirodookhrannoe znachenie (Marsh systems of Western Siberia and their conservation value): edited by Kuvaev V.B., Tula: Grif i Co Publ., 2001, 584 p.

3. Resolution of the Government of the Khanty-Mansi Autonomous Okrug-Yugra no. 485-P of 23.12.11. “O sisteme nablyudeniya za sostoyaniem okruzhayushchey sredy v granitsakh litsenzionnykh uchastkov na pravo pol'zovaniya nedrami s tsel'yu dobychi nefti i gaza na territorii Khanty-Mansiyskogo avtonomnogo okruga-Yugry” (On the system for monitoring the state of the environment within the boundaries of licensed areas for the right to use subsoil for the purpose of oil and gas production in the Khanty-Mansiysk Autonomous Okrug-Yugra).

4. Moskovchenko D.V., Ekogeokhimiya neftegazodobyvayushchikh rayonov Zapadnoy Sibiri (Ecogeochemistry of oil and gas regions of Western Siberia), Novosibirsk: Geo Publ., 2013, 259 p.

5. Resolution of the Government of the Autonomous Okrug No. 441-P dated 10.11.04. “Predel'no dopustimyy uroven' (PDU) soderzhaniya nefti i nefteproduktov v donnykh otlozheniyakh poverkhnostnykh vodnykh ob"ektov na territorii Khanty-Mansiyskogo avtonomnogo okruga-Yugry” (Maximum permissible level (MPL) for the content of oil and oil products in bottom sediments of surface water bodies on the territory of the Khanty-Mansiysk Autonomous Okrug-Yugra).

The process of oil production is accompanied by the impact on all components of natural environments: atmospheric air, soil and vegetation cover, surface waters, including bottom sediments. In the conditions of the Middle Ob region, with its high degree of swampiness and lakes, it is the bog-lacustrine ecosystems that are the most vulnerable in the course of human economic activity. This also applies to the territory of the Lyantorskoye oil and gas condensate field, developed since 1978, in the landscape structure of which lake-bog complexes occupy almost 80% of the territory. At long-term developed fields, primarily those whose exploitation began in the Soviet period, background observations of the state of natural environments, including surface water and bottom sediments, were not carried out. This gap was filled only in the post-Soviet period, and at the beginning of the 21st century, hydrochemical studies became regular with the determination of a large number of pollutants. The Lyantorskoye field, like other long-term developed fields, is also covered by annual hydrochemical studies with a large number of determined components in 10 watercourses. The results of these studies are presented in the article. As a result of the analysis of the current state of the surface waters of the Lyantorskoye field, it was established that the presence of phenols, biogenic substances, heavy metals and other chemical substances in the surface waters, the content of which exceeds the established maximum permissible concentrations. This is typical not only for the rivers of this field, but also for other watercourses in the territory of the Khanty-Mansiysk Autonomous District - Yugra, where hydrocarbon production is not carried out. The noted is associated with the natural features of the area and the processes taking place in the bowels of the earth. Analysis of the research results indicates that the long-term operation of the Lyantorskoye field did not have a visible effect on the hydrochemical state of surface waters and bottom sediments of the field's streams. The increased content of some pollutants is caused not only by technogenic factors, but by the natural features of the taiga zone of Western Siberia.

References

1.  Shubaev L.P., Surgut Polesye of West Siberian Lowland (In Russ.), Izvestiya VGO SSSR = Proceedings of the Russian Geographical Society, 1956, T. 88, no. 2, pp. 167–169.

2. Liss O.L., Abramova L.I., Avetov N.A. et al., Bolotnye sistemy Zapadnoy Sibiri i ikh prirodookhrannoe znachenie (Marsh systems of Western Siberia and their conservation value): edited by Kuvaev V.B., Tula: Grif i Co Publ., 2001, 584 p.

3. Resolution of the Government of the Khanty-Mansi Autonomous Okrug-Yugra no. 485-P of 23.12.11. “O sisteme nablyudeniya za sostoyaniem okruzhayushchey sredy v granitsakh litsenzionnykh uchastkov na pravo pol'zovaniya nedrami s tsel'yu dobychi nefti i gaza na territorii Khanty-Mansiyskogo avtonomnogo okruga-Yugry” (On the system for monitoring the state of the environment within the boundaries of licensed areas for the right to use subsoil for the purpose of oil and gas production in the Khanty-Mansiysk Autonomous Okrug-Yugra).

4. Moskovchenko D.V., Ekogeokhimiya neftegazodobyvayushchikh rayonov Zapadnoy Sibiri (Ecogeochemistry of oil and gas regions of Western Siberia), Novosibirsk: Geo Publ., 2013, 259 p.

5. Resolution of the Government of the Autonomous Okrug No. 441-P dated 10.11.04. “Predel'no dopustimyy uroven' (PDU) soderzhaniya nefti i nefteproduktov v donnykh otlozheniyakh poverkhnostnykh vodnykh ob"ektov na territorii Khanty-Mansiyskogo avtonomnogo okruga-Yugry” (Maximum permissible level (MPL) for the content of oil and oil products in bottom sediments of surface water bodies on the territory of the Khanty-Mansiysk Autonomous Okrug-Yugra).


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