Abstract
This research continues a series of studies on the migration of various classes of petroleum hydrocarbons in productive strata (these are Jurassic and Lower Cretaceous deposits) on the Borovaya Area in Western Siberia. In the bitumen obtained from well core samples, the content and molecular mass distribution of hydrocarbons were determined by chromatography-mass spectrometry: alkylbenzenes of the composition C8–C34; biarenes, including naphthalene, methylnaphthalenes, dimethylnaphthalenes; triarenes, including phenanthrene, methylphenanthrenes. The research considered the interlayers movement of arenes from the Upper Jurassic oil accumulation zone to the over- and underlying strata. According to the prospects of Cretaceous deposits of the Borovoye oil field, the study confirms the conclusions of the authors’ early publications. Hydrocarbons come from the Jurassic reservoirs to the Cretaceous very little. The migration of light (up to C20) components is recorded, which are dispersed over the rock layers, which may indirectly indicate the absence of geological conditions for the accumulation of hydrocarbons and the formation of non-structural deposits in the Lower Cretaceous section of the Borovaya Area.
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