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Geology & Geochemistry of Combustible Minerals No. 3-4 (176-177) 2018, 5-20.
Olesya SAVCHAK
Institute of Geology and Geochemistry of Combustible Minerals of National Academy of Sciences of Ukraine, Lviv, e-mail: igggk@mail.lviv.ua
Abstract
The Western oil-gas region of Ukraine is the most important oil- and gas-producing region of Ukraine and is the oldest one as to the time of discovery of commercial deposits of hydrocarbons. In all 94 fields were discovered in the region. Six of them belong to great, eight – to middle and eighty – to small. The greatest amount of fields is in the Bilche-Volytsa (47) and the Boryslav-Pokuttya (39) oil-gas regions. In the Transcarpathian gas-bearing region five gas fields are known, in the Carpathian – two oil fields and within the limits of the Volyn-Podillya area – two gas fields. We have analysed the geochemical composition of oil and condensate for 3 structural-tectonic elements of the region: outer, inner zone of the Carpathian Foredeep and Folded Carpathians and the comparative analysis of the composition of natural hydrocarbons within the limits of the region was carried out. The analysis of peculiarities of the geological structure and oil and gas presence in the totality with available geochemical data has allowed us to come to a conclusion that formation of oil and gas deposits in the Western oil- and gas-bearing region is caused both lateral and vertical migration of hydrocarbons.
Keywords
geochemical features, migration, hydrocarbons, Western oil and gas region of Ukraine.
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