The influence of long time development of Vachimskoye field on the water ecosystem of the Middle Ob

UDK: 502.6: 622.276.5

DOI: 10.24887/0028-2448-2019-1-110-113

Key words: Vachimskoe oil-gas-condensate field, surface waters, swamps, lakes, oilfield, ecological condition of the environment, ecological monitor

Authors: А.М. Soromotin (Tyumen Branch of SurgutNIPIneft, RF, Tyumen), А.Yu. Solodovnikov (Tyumen Branch of SurgutNIPIneft, RF, Tyumen)

It's a common fact that gas-oil extraction influences all the components of the nature: atmospheric air, soils, surface and subsurface waters, including the bottom clays. In case of the Middle Ob where there’re a lot of swamps, water ecosystem suffers from the agricultural activities. On the one hand, oil production contributes to a change in the appearance of the surrounding landscapes as a result of the construction of various objects accompanying hydrocarbon production, and on the other, the geochemical background changes at the production sites. In the first case, changes can be measured in areal units. In the second case, a lot of geochemical analysis should be performed, the results of which draw certain conclusions. It should be emphasized that the obtained geochemical results require clarification, since in Western Siberia the background values of some chemical compounds initially exceed the maximum permissible concentrations established by the standards. At long-term developed fields, especially those whose exploitation began in Soviet times, background observations of the state of natural environments were not conducted. Such fields include the Vachimskoye oil-gas-condensate field, which has been developed for 30 years. Therefore, it is not always possible to correctly determine the degree of impact of the developed fields on the components of natural environments. To a certain extent, this gap can be resolved by analyzing the results of many years of geochemical observations of the state of natural environments.