Environmental Assessment in the Oil and Gas Production Areas (North of Western Siberia)

Lead Author Marina, Opekunova
Institution Contact Saint-Petersburg State University Russia, Saint-Petersburg, 199178, 10-th line, 33-35, room 65.
Co-Authors Anatoly Opekunov, Saint-Petersburg State University, Russia Stepan Kukushkin, Saint-Petersburg State University, Russia Mikhail Shirokov, Saint-Petersburg State University, Russia
Theme Theme 1: Vulnerability of Arctic Environments
Session Name 1.5 Assessment of Environmental Impact of Industrial Activities in the Arctic
Datetime Wed, Sep 14, 2016 10:30 AM - 10:45 AM
Presentation Type Oral
Abstract text Analysis of the environment state of oil and gas regions in the Yamalo-Nenets Autonomous District (YaNAO) on the basis of researches in the north of Western Siberia (2003-2015 years) is carried out. Study methodology is based on the collection, collation and interpretation of ecological and geographical information of key environmental components (surface water, bottom sediments, soil, vegetation, and snow). The analysis is performed on three levels of landscape organization: local (near the sources of pollution), territorial (within the license areas) and regional (YaNAO territory). Regional geochemical background of content of microelements in the landscape components is calculated and geo- and bio-indicators of anthropogenic contamination during oil and gas production are found.
At the local level, chemical pollution by hydrocarbons (HC), naphthalene and some microelements of all landscape components near the quarries, wells, roads are identified. High total content of Ba, V, and mobile forms of Pb, Cu, Ni, Co, Zn are indicators of contamination of snow, soils and bottom sediments during drilling operations. Representative indicator plants species of environmental contamination (Ledum decumbens, Cladonia alpestris, Vaccinium vitis-idaea and the bark of Larix sibirica) are identified. Secondary biocenoses after fire and secondary swamping are established. Complete or partial transformation of the landscape or the territory desertification after geomechanical effects are found.
At the territorial level, the increased background contents of HC in water and soils within individual license areas is defined. Geomechanical effects are the most common, this is reflected through the disturbed areas (1-2% of the area). Desertification and secondary vegetation in some areas are observed (up to 15-25% of the territory).
At the regional level, a slight increase of HC content in natural waters, as well as a weak PCB contamination of soil are found. Changes in soil and vegetation covers and landscape geomechanical disturbances are slightly expressed.
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