Features of lower-middle Jurassic deposit formation in the east of West Siberian Arctic regions

Early-Middle Jurassic deposits in the north of the West Siberian Province (including the Yenisei-Khatanga regional trough territory) have not been fully developed to date because of high technological and geological risks of oil and gas accumulation exploration, prospecting, and assessment. At the same time, geological exploration conducted in the study area allowed obtaining new actual data. Analysis of their results integrated with archival geological and geophysical materials made it possible to update geoseismic and lithofacies models. This eventually contributes to improving quality of petroleum potential prediction with substantiation of both anticlinal and structurally complicated (combination and structural and tectonic) hydrocarbon traps. Updating geological structure of Lower-Middle Jurassic deposits in the north of Western Siberia will contribute to replacement of resource potential of the region. The main promises of the Lower-Middle Jurassic deposits are related to channel and deltaic sequences, and also with the zones of nondepositional unconformities (pinch-out and washout areas) that form structurally complicated traps