ASSESSMENT OF THE TECHNOGENIC DISTURBANCE OF OIL FIELDS WITHIN THE MIDDLE OB RIVER REGION, RUSSIA, BY THE USE OF SATELLITE IMAGERY

D. V. Moskovchenko^1,2*, A. G. Babushkin^1,**, I. P. Idrisov^2,***

¹ Tyumen Scientific Centre, Siberian branch RAS, ul. Malygina 86, Tyumen, 62502 Russia

² Tyumen State University, ul. Volodarskogo 6, Tyumen, 625003 Russia *E-mail: moskovchenko1965@gmail.com
**E-mail: ab@gisi.ru
***E-mail: ildaridrisov@yandex.ru

The present study focuses on landscape degradation and dynamics of forest cover in the Middle Ob region. Satellite imagery (Landsat-8 OLI and Sentinel-2) of the oil-development area was used to carry out a survey of the changing landscape. Areas of disturbed lands within 25 oil fields were estimated on the basis of data from remote sensing and subsequent field researches. The land cover types were classified based on the dominant vegetation type present in the area. Depending on the quantity of oil resources, the duration of their development and the transport network density, proportions of technogenically disturbed areas varied from 1.05 to 10.5% (3.1%, on average) of the oil fields’ total areas. A total area of technogenic disturbance within the Middle Ob Region was found to be higher than that within oil fields in the Ural-Volga Interfluve. Linear objects (roads, pipelines and powerlines) were shown to cause 5.9 times more disturbance than nonlinear objects (clusters of development wells, quarries, exploratory drilling sites, etc.). There was a significant correlation between the duration of oil field development and the area of disturbed geosystems. In eight of our study sites, areas of non-industrial disturbance caused by forest felling and forest fires were larger than areas of disturbance caused by the formation of petroleum development infrastructure. A continuous influence of fires on the structure and composition of forest communities was illustrated by the fact that secondary forests, most of which have a pyrogenic origin, represented 23% of the total forested area.

Key words: oil production, Middle Ob region, remote sensing, disturbance, linear disturbances, burning areas

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