V.A. Kontorovich, A.Yu. Kalinin, L.M. Kalinina, M.V. Solovev
 
Seismogeological models and petroleum potential of sedimentary sequences in the Arctic regions of Lena-Tunguska petroleum province (Anabar-Khatanga, Lena-Anabar petroleum areas)
DOI 10.31087/0016-7894-2019-5-15-26

The paper considers seismogeological, structural and tectonic features and analyzes petroleum potential of the Neoproterozoic-Paleozoic and Mesozoic sedimentary sequences in Arctic regions of the Siberian Platform. Results of the research allow concluding that a sedimentary basin occurs in the Anabar-Khatanga and Lena-Anabar oil-and-gas bearing areas with a thickness up to 14–16 km; in the section of this basin, 5 regionally developed seismogeological sequences are identified: Riphean, Vendian, Lower-Middle Paleozoic, Permian, and Mesozoic. The results of the structural-tectonic analysis showed that the following factors mainly affected the modern structural-tectonic features of the region: the pre-Permian hiatus; salt tectogenesis, which predetermined the formation of diapirs and associated anticlinal structures, and unidirectional Permian and Mesozoic-Cenozoic tectonic movements. The Arctic regions of the Siberian platform are promising in terms of petroleum potential. There are numerous bitumen, oil and gas shows; Neoproterozoic, Devonian and Permian oil-producing formations are developed; and high-capacity reservoirs are identified in sections of all sedimentary sequneces. In the Anabar-Khatanga region, anticlinal structures associated with salt domes are of most interest in the context of petroleum potential. Near the open diapirs breaking through the entire thickness of the Upper Devonian, Carboniferous, and Permian combination traps can be formed associated with pinching out of terrigenous and carbonate reservoirs at salt domes; above the buried salt domes, classical anticlinal traps may form in Permian and Mesozoic sediments. In the Lena-Anabar petroleum area, the most promising are Permian, Cambrian, Vendian, and Riphean deposits. Oil and gas promising objects in Permian sediments may be associated with anticlinal structures; Cambrian and Vendian deposits are perspective mainly in the southern part of the Lena-Anabar petroleum area, where hydrocarbon reservoirs can be controlled by structural-stratigraphic, structural-lithological and structural-tectonic traps. The erosion-tectonic Riphean protrusions at the depths of 1400–2000 m found in the southern part of the Lena-Anabar petroleum area are of interest in relation to the petroleum potential of the Riphean deposits.

Key words: Anabar-Khatanga Petroleum Area; Lena-Anabar Petroleum Area; sedimentary basin; seismogeological sequence; seismic horizon; structural map; tectonics; salt dome (diapir); petroleum potential; petroleum prospects; trap.

For citation: Kontorovich V.A., Kalinin A.Yu., Kalinina L.M., Solovev M.V. Seismogeological models and petroleum potential of sedimentary sequences in the Arctic regions of Lena-Tunguska petroleum province (Anabar-Khatanga, Lena-Anabar petroleum areas). Geologiya nefti i gaza. 2019;(5):15–26. DOI: 10.31087/0016-7894-2019-5-15-26.

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V.A. Kontorovich

Trofimuk Institute of Petroleum Geology and Geophysics of Siberian Branch of Russian Academy of Sciences (IPGG SB RAS),

Novosibirsk State University,
Novosibirsk, Russia;

kontorovichva@ipgg.sbras.ru

A.Yu. Kalinin

Trofimuk Institute of Petroleum Geology and Geophysics of Siberian Branch of Russian Academy of Sciences (IPGG SB RAS),

Novosibirsk State University,
Novosibirsk, Russia;

kalininay@ipgg.sbras.ru

L.M. Kalinina

Trofimuk Institute of Petroleum Geology and Geophysics of Siberian Branch of Russian Academy of Sciences (IPGG SB RAS),
Novosibirsk, Russia;

kalininalm@ipgg.sbras.ru

M.V. Solovev

Trofimuk Institute of Petroleum Geology and Geophysics of Siberian Branch of Russian Academy of Sciences (IPGG SB RAS),

Novosibirsk State University,
Novosibirsk, Russia;

solovevmv@ipgg.sbras.ru