Akademik Veri Yönetim Sistemi
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences, cilt.2024, sa.4, ss.143-156, 2024 (Scopus)
In the context of the contemporary development of the oil and gas sector in the Republic of Kazakhstan, it is crucial to possess an understanding of the mechanisms and patterns of distribution of heavy metals in the environment. This circumstance thus necessitates the implementation of a programme of constant monitoring and ecologicalgeological assessment of the entry of heavy metals into the soils of oil fields. This article addresses the issues of ecological and geological assessment of soil conditions in oil fields in the Atyrau region of the Republic of Kazakhstan. The highest categories of soil contamination with heavy metals were identified in the vicinity of the Iskene and Koschagyl deposits. The findings of the study allow for the accurate determination of the extent and overall category of soil contamination in oil fields. The study was conducted in accordance with the established techniques and methods. The issue of objective ecological-geological assessment of oil fields is addressed through the utilisation of standardised methodologies for the calculation of the total indicator, with due consideration given to the excess of maximum permissible or background concentrations of pollutants. A methodology is proposed for calculating a complex indicator that can take into account the varying dimensions of soil contamination. This includes the frequency of excess of conditionally natural background concentrations, the frequency of exceeding the maximum permissible concentrations of pollutants, and their hazard class. The priority scale of pollutants is based on well-known, scientifically-based gradations of soil pollution parameters. Using standard and proposed methods for calculating soil pollution, the geo-ecological situation was established at distances of up to 10 km.