The article considers the ecological state of river-water of the territory of developed and non-developed fields of PJSC Surgutneftegas in the basin of the Ai-Pim River. The Ai-Pim Basin located on the slope of the lowest part of the Middle Ob Plain - in the Surgut lowland, where the stagnant hydrological phenomena are in evidence, has been affected by the hydrocarbon deposits development for more than 30 years. Impact of hydrocarbon greenfields development is less. All this together have an effect on the state of natural environment. First of all, the appearance of the surrounding landscapes has changed due to the construction of industrial objects. At the same time, their construction on waterlogged lands has increased the drainage of the terrain, and this, in turn, had a favorable effect on the growth in the species diversity of plant communities and wildlife. Changes in the geochemical state of water objects are not visually detected, therefore, to determine the degree and consequence of an impact Surgutneftegas PJSC is regularly monitoring the state of surface water, including bottom sediments.
In the waters of the Ay-Pim River and its tributaries it is established the presence of hydrocarbons, phenols, biogenic substances, heavy metals and other chemical substances, the content of which exceeds the maximum permissible concentration. This is typical not only for The Ai-Pim Basin, but also for other watercourses on the territory of the Khanty-Mansiysk autonomous district – Ugra, where hydrocarbon production is not conducted. This statement is confirmed by long-term studies, including studies performed by Surgutneftegas. It is shown that the content of oil products, chlorides, heavy metals and other compounds in the bottom sediments is within the environmental standards characteristic of the Khanty-Mansiysk autonomous district. The excess of the limiting indicators are rare, and it indicates the absence of pollution of bottom sediments by oil and gas production facilities.
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