№72-09

Peculiarities of the total content of metals in oil deposits of the Dnipro-Donetsk depression

V. Ishkov1,2, Ye. Kozii1, M. Kozar3, A. Yerofieiev4, S. Bartashevskiy1, O. Dreshpak1

1 Dnipro University of Technology, Dnipro, Ukraine

2 Institute of Geotechnical Mechanics named by M. Polіakov of National Academy of Sciences of Ukraine, Dnipro, Ukraine

3 M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of the NAS of Ukraine

4 V. N. Karazin Kharkiv National University, Kharkiv, Ukraine

Coll.res.pap.nat.min.univ. 2023, 72:98-114

https://doi.org/10.33271/crpnmu/72.098

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ABSTRACT

Purpose. To establish the peculiarities of the total content of metals in oil deposits of the Dnipro-Donetsk depression and to develop a classification of deposits by this indicator.

Methodology. The factual basis of the research was the results of analyzes of metals in oil from 36 deposits of the Dnipro-Donetsk depression. With the help of X-ray fluorescent analysis, at least 30 oil samples from each deposit for metals content were investigated. The deposits are selected according to the principles of maximum completeness of geochemical information, their finding in different oil and gas areas of the Dnipro-Donetsk depression, different composition of the oil system, different geological types of traps, different structure of deposits and different ages of oil collectors. X-ray fluorescent analysis was performed on the energy-dispersive spectrometer "SPRUT" SEF 01. The time of accumulation of the spectrum 600 sec. Preparation and analysis were carried out according to the standard of ASTM D 4927 - "Determination of the elemental composition of components of lubricants by X-ray fluorescent spectroscopy with dispersion by wavelength". Correlation and regression analysis was carried out by methods that were implemented in the most popular professional statistical software platforms "Statistica" and "SPSS" and their analysis in geological concepts.

Findigs. To evaluate the central characteristics of the total content of metals in oil, the deposits considered more correctly use not the arithmetic mean, but the median. It is proved that the total content of metals in oil considered is associated with a reverse correlation connection with resin content, the values of the modern temperature of the productive horizon, the modern depth of productive horizon, the mineralization productive horizons; and direct correlation with the concentrations of nickel, manganese, mercury, chromium, vanadium, aluminum, cobalt, zinc, iron, paraffin, asphalt, sulfur and oil viscos boiling and oil density.

Scientific novelty. It consists in the development of the natural classification of oil deposits by the overall content of metals, and to establish a connection of this indicator with the concentration of individual elements of impurities, the main components of oil and the main geological and technological indicators of deposits of the Dnipro-Donetsk depression.

Practical significance. Is to establish the concentrations and the possibility of forecasting the total content of metals in the Dnipro-Donetsk depression, which in turn provides the opportunity to solve the topical problems of practical direction. The solution of a number of industrial-raw materials based on the assessment of oil as an ore raw material, since the content of some elements in them sometimes exceeds ore concentrations, so there is a possibility of their concomitant industrial removal from by-products during processing processes. The solution of technological issues, which are caused by the negative impact of some elements contained in oil, on the geological environment, production technologies and the equipment used in the course of their extraction and processing.

Keywords: oil, metals content, linear regression equations, correlation coefficient, petrogenesis, normalized content, cluster analysis, elements of impurities.

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