Oil fields exploitation influence on all environmental media, especially on surface waters and bottom clays. On the other when the hydrochemical state of surface waters changes due to heavy rainfall, temperature fluctuations and other factors, bottom sediments are less prone to temporary fluctuations and act as an indicator of the state of surface waters in general. Bottom sediments as a natural reservoir allow to understand the nature of the presence of certain pollutants in them. In addition to the anthropogenic sources causing pollution of water bodies, their condition is significantly affected by the geochemical factors of the catchment formation, the landscape structure of the territory and the peculiarities of the watercourses recharge (ratio of sources).
Hydrocarbon production on the territory of the Rogozhnikovskoye field has been going on for 15 years, and environmental studies has been carried out for 20 years. This allowed not only to determine the background state of natural environments, but also to assess their state in dynamics. At the same time, external pollution introduced by air flows and transit streams, as well as the natural and geographical features of the geochemical province within which the field is located, were taken into account. An important factor is that the southwestern part of the field is cut by the Ob River and numerous channels and is flooded during high water for several months with a multimeter layer of water. Therefore, any pollution that enters the watercourses will be spread beyond the pollution source.
An analysis of the data obtained over a 20-year observation period for the state of surface waters, including bottom clays, allows to state that the content of the ingredients determined during environmental monitoring is within the established quality standards and corresponds to the geochemical characteristics inherent in the Belogorsk landscape province. This indicates that the long-term development of the Rogozhnikovskoye oil field did not lead to pollution of surface waters and bottom sediments. No geochemical anomalies due to hydrocarbon production have been revealed.
References
1. State report “O sostoyanii i ispol'zovanii mineral'no-syr'evykh resursov Rossiyskoy Federatsii v 2016 i 2017 godakh” (On the state and use of mineral resources of the Russian Federation in 2016 and 2017), Moscow: Mineral-Info Publ., 2018, 370 p.
2. Report. Khanty-Mansiysk: service for control and supervision in the field of environmental protection, wildlife and forest relations of the Khanty-Mansiysk Autonomous Okrug-Ugra “Ob ekologicheskoy situatsii v Khanty-Mansiyskom avtonomnom okruge-Yugre v 2018 godu” (On the environmental situation in the Khanty-Mansiysk Autonomous Okrug - Ugra in 2018), Khanty-Mansiysk, 2019, 187 p.
3. Uvarova V.I., Current state of water quality in the Ob river within the Tyumen region (In Russ.), Vestnik ekologii, lesovedeniya i landshaftovedeniya, 2000, no. 1, pp. 23–33.
4. Solodovnikov A.Yu., Khattu A.A., Belogorye: features and natural environments state (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2012, no. 8, pp. 76–80.
