Академическое издательство «Гео»

Electromagnetic, magnetotelluric soundings, transient electromagnetics, permafrost, cryolithozone, gas hydrates, Yenisei-Khatanga trough, Anabar-Lena trough



KRIOSFERA ZEMLI, 2018, Vol. XXII, № 5, p. 77-95

Permafrost study in the northern margin of the Siberian platform based on regional geoelectric survey data

D.V. Yakovlev1, A.G. Yakovlev1,2, O.A. Valyasina2

1Nord-West Ltd., korpus A, Business centre “Rumyancevo”, pos. Moskovskiy, Moscow, 108811, Russia;
nw.yakovlev@gmail.com
2Lomonosov Moscow State University, Faculty of Geology, 1, Leninskie Gory, Moscow, 119991, Russia

The article presents results of permafrost study within northern margins of the Siberian Platform, obtained during regional geoelectric surveys by magnetotelluric and transient electromagnetic methods. The surveys aimed to identify areas perspective for oil and gas within the entire sedimentary cover. From 2005 to 2016, more than 30,000 soundings were performed with a total survey line length of more than 20,000 km. A large amount of factual data acquired in the Yenisei-Khatanga and the Anabar-Lena regional troughs allowed mapping the depth of permafrost base and provided insights about other structural features of the permafrost interval, along with the information on permafrost distribution beneath the Khatanga bay. High-resistivity anomalies identified over hydrocarbon reservoirs capped by the permafrost strata can be associated with accumulations of gas-hydrates.

Electromagnetic, magnetotelluric soundings, transient electromagnetics, permafrost, cryolithozone, gas hydrates, Yenisei-Khatanga trough, Anabar-Lena trough

DOI: 10.21782/KZ1560-7496-2018-5(77-95)

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