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Technique of the Expert Evaluation of Environmental Geological Pollution in the Oil Spills (the Case of the Coastland of the Barents Sea). P. 5–15

Версия для печати

Section: Geosciences

UDC

[622.276:504](943.8)

Authors

M.G. Gubaydullin*, O.V. Krayneva*
*Northern (Arctic) Federal University named after M.V. Lomonosov (Arkhangelsk, Russian Federation)
Corresponding author: Marsel’ Gubaydullin, address: Naberezhnaya Severnoy Dviny, 14, Arkhangelsk, 163002, Russian Federation; e-mail: m.gubaidulin@narfu.ru

Abstract

The paper presents the results of an expert assessment of contamination in the upper part of the geological environment in the oil spills in the rapidly developing oil and gas region in relation to the method developed by the authors. The authors give the definition of the geological environment as the research object and describe the natural and man-made factors affecting its ecological status. The work provides the information on the executed researches of oil in two oil fields (Varandey, Toravey) located in the coastland of the southeastern part of the Barents Sea. The method shows some patterns of changes in the physical properties and chemical composition of hydrocarbons depending on the conditions of their occurrence and the well operation. The work indicates the urgency of techniques developing that allow considering complex multicomponent contaminant impact on the geological environment of the coastal zone. The authors focus on addressing a wide range of characteristics of oil in the initial stages of the environmental documentation development to understand the possible consequences of ingress of oil in the geological environment. This will assess the potential risk of change and intensification of cryogenic processes, and the ability of oil-polluted ecosystems in the coastal zone to regenerate itself. The authors substantiate the choice of the influencing factors applied in the expert assessment; a special attention is given to the main physical and chemical characteristics of oil. The essence of the developed methodology is stated; the scale of numerical scores is presented; the mathematical apparatus of techniques application is described; the results of determining the weight coefficients, which allow specifying the resulting estimates, are demonstrated. The results of implementation of this method on the example of the Varandey oil field located in the area of research are given; and the site zoning according to the level of potential risk of oil spills is carried out.

Keywords

oil properties, technique of an expert evaluation of oil pollution, geological environment, oil pollution
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References

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