Environmental issues of the development of metalliferous oil of the Bazhenov Formation
I. G. YASHCHENKO, I. V. RUSSKIKH
Institute of Petroleum Chemistry, Siberian Branch of the Russian Academy of Sciences, Tomsk, Russia
Keywords: metalliferous oil, Bazhenov Formation, vanadium, nickel, deposits, West Siberian oil and gas basin
Abstract
Analysis of the properties of the Bazhenov Formation metalliferous oil from the West Siberian oil and gas basin is presented During the development of these oil reserves, there is a danger of heavy metals (for example, vanadium and nickel) entering the environment during oil extraction, transportation and refining. The information from the database of the Institute of Petroleum Chemistry SB RAS (Tomsk) and the methods of statistical and spatial analysis of geographical information systems are used in the work. Based on the classification of hard-to-recover oil, deposits of the Bazhenov Formation with high and medium vanadium and nickel content have been identified. The distribution of oil from these fields over the depth of occurrence is shown. With an increase in the depth of occurrence, the concentration of metals in oil decreases by almost an order of magnitude. The lithological features of reservoir rocks have been revealed: metalliferous Bazhenov oil is mainly found in sandstones (86.2 % of oil samples) and in sandy-siltstone rocks (13.8 % of samples), which confirms that the reservoirs of the formation belong to the terrigenous type. The average values of reservoir parameters characterising filtration properties and the capacity of deposits are determined. To analyse metalliferous Bazhenov oil, a set of 68 oil samples from 33 fields in the West Siberian oil and gas basin was used. The results obtained in the study can be used in the development of new methods and technologies, and improvement of the existing ones, for the extraction and processing of metalliferous oil, taking into account environmental consequences.
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