The main gas condensate and oil bearing fields are concentrated within the polar area of Western Siberia. The target depth varies from 900 m for Cenomanian gas deposits up to 4000 m for Upper-Middle Jurassic oil, gas and gas condensate sediments. The target structure is very complex that is why 2 and 3D seismic survey is required to explore the fields. However, seismic survey is complicated by environment.

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