The objective of this article is an estimation of the oil and gas potential of the north of the Siberian platform and adjacent shelf. The Siberian platform is characterized by a large concentration of oil and gas resources in the southern and central parts of the platform. The main oil and gas province of the Siberian Platform is the Leno-Tungus oil and gas province. The oil- bearing strata in the Lena-Tungus oil and gas province are confined to the Riphean, Vendian, Lower-Middle Cambrian deposits, in which large oil and gas fields are discovered. In modern contours the Siberian platform in the north and north-west is fringed by the Yenisei-Khatanga regional trough. In the east, the Yenisei-Khatanga regional trough is connected with the Anabar- Lena trough, framing the north-eastern part of the Siberian platform. Analysis of the available geological and geophysical materials shows a fairly high potential of the Anabar-Lena and Yenisei-Khatanga troughs for the discovery of large hydrocarbon fields. The basic understanding of the geologic-tectonic structure and petroleum potential of the northern part of the Siberian Platform and the adjacent shelf of the Arctic zone are currently based on seismic data by the method of the common depth point (CDP), tied to the existing deep search and parametric wells. Representations of the deep structure and oil and gas potential of specific areas, the allocation of targeted promising oil and gas horizons can change dramatically as the depth of seismic acquisition of the method of the common depth point increases and the software for processing and interpreting seismic data is improved. The localized oil and gas resources of the north of the Siberian platform and adjacent shelf are 41017,3, subsequently, 27582,3 - onshore and offshore - 13435 MMT (million tons) of oil equivalent.
The geological studies carried out on the territory of the Taimyr autonomous district of the Krasnoyarsk Krai during the period of 1930-1950 by the Glavsevmorputi subdivisions, the USSR Mingeo organizations and the institutes of the USSR Academy of Sciences (AS) show a considerable thickness of sedimentary deposits perspective for oil and gas, the availability of the Paleozoic salt-bearing sections, the prolongation of the continental tectonic structures into the water area of the marginal seas followed by the increase of the sedimentary deposits The TAD borders on three oil and gas bearing provinces of Siberia such as the West-Siberian, the Khatango-Vilyuisk and the Leno-Tungussk the limits of which allocate the Enisei-Khatangsk OGR and partially the Pur -Tazovsk OGR. (20). The total area of the oil and gas potential lands is over 550 th square km (13).The history of the development of the Arctic segment of the Earth form the view of the plate tectonics . In the process of the disintegration of the Pungea supercontinent the deposition of the Arctic segment of the Earth began. The course of crushing and dragging of separate sections of the Lavrasia continent and the simultaneous joining it up with small microcontinents resulted in the formation of the Arctic ocean basin with its numerous depressions and uplifts -ranges (15,18). In the Devonian the riftogenesis caused the formation of the oceanic basin of the recent Arctic Ocean (21) . The Arctic basin continued to exist as gigantic gulf of the Pacific Ocean without any changes from the Devonian to the Late Jurassic (4).The early period of the formation of the Early Mesozoic rift systems of the West-Siberian platform, North-West Europe, the North Sea, North America the Paleozoic median-ocean ridges of the Arctic Ocean and the Atlantic Ocean witnessed the downwarping of large territories and the formation of the Permian sedimentary basins of the sedimentation (19,21) The splitting of the lithosphere followed by the formation of the abovementioned rift systems ,the formation of separate microcontinents separated from the continental platforms by the foredeeps was observed in the Triassic (19).From the Late Jurassic to the Late Cretaceous there was observed the formation of the ocean crust in the Makarov and Kanadian cavities.The extension of the territory of the East-Siberian depression in the Upper Jurassic and the Early Cretaceous resulted in the formation of the East-Siberian lithospheric plate, and the spreading of the continental Taimyr block-microcontinent was followed by the formation of the Enisei-Khatangsk trough. The formation of the typical Hertzianocean results from the downwarping compensated by a powerful sedimentation (10).The course of spreading of the lithospheric plates in the Late Mesozoic and the Early Cenozoic exhibits a regular downwarping of large territories and the formation of the depressions of the Arctic and the Atlantic oceans (4,10).The medianocean ridges with the crust of the ocean type are formed in the axial zones of the ocean. The a...
The report discusses issues related to the assessment of the resource base and the development potential of the Arctic zone of the Siberian platform along the Northern sea route, the region of Russia with a high concentration of oil and gas resources. The basic concepts on the geological structure and the oil and gas potential of the Arctic zone of the Siberian platform are based on seismic data tied to existing deep exploratory wells. To date, five petroliferous complexes have been described in the Yenissei-Khatanga (the Yenisei Bay, the Yenisei-Khatanga regional trough) Anabar-Khatanga (Anabar-Khatanga saddle, Khatanga bay) Anabar-Lena oil and gas regions (Anabar-Lena trough and adjacent shallow shelf of the Laptev Sea) and the South Laptev sea promising oil and gas region for the main oil and gas complexes: Riphean, Vendian, Vendian-Middle Paleozoic, Upper Paleozoic and Mesozoic. The report considers the results of the analysis of estimates of the filtration-capacitive properties of the sedimentary cover rocks in the marginal zones of the north of the Siberian platform available on 01/01/2019. Open fields are briefly described. The obtained results allow for the adjustment of state programs for the development of the Arctic zone of the Siberian Platform (Yenisei-Khatanga, Anabar-Khatanga and Anabar-Lena oil and gas regions, South-Laptev Sea promising oil and gas region).
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