Heat flux density, mantle structure and oil and gas potential of the Yamal Peninsula (Arctic)

К С Иванов ,Н П Костров

doi:10.24930/1681-9004-2020-20-6-851-862

Abstract

Research subject. The Yamal Peninsula is of interest due to the fact that the concentration of hydrocarbon deposits per unit area is more than 100 times higher than the “world average”, which is confirmed by the reserves of the largest oil and gas fields already discovered. At the same time, the knowledge of the deep horizons of the earth’s crust and mantle within the Yamal and adjacent areas is clearly insufficient in comparison with more southern regions.Methods. In this work, the method of seismic tomography was used, which makes it possible to identify anomalies in the velocities of seismic waves directly related to the heat flow density and geodynamic activity of the subsurface.Conclusons. Apparently, the Western Yamal positive thermal anomaly indicates a region of a high geodynamic activity permeable for deep fluid-gas streams. The location of Yamal on a slightly raised shoulder of this anomalous region has determined the high oil and gas potential of this peninsula. Other regions situated in the vicinity of the discovered thermal anomaly may present significant research interest.

Highlights

Исследования проводятся в рамках госбюджетной темы ИГГ УрО РАН No АААА-А18-118052590032-6 “Палеогеодинамика и эволюция структурно-вещественных комплексов при формировании земной коры континентального типа”, при поддержке проекта РФФИ No 18-05-70016 “Геологическое строение и эволюция кристаллического фундамента и рифтового комплекса полуострова Ямал и сопредельных территорий Арктической части Западно-Сибирского нефтегазоносного мегабассейна”
The Yamal Peninsula is of interest due to the fact that the concentration of hydrocarbon deposits per unit area is more than 100 times higher than the “world average”, which is confirmed by the reserves of the largest oil and gas fields already discovered
The knowledge of the deep horizons of the earth’s crust and mantle within the Yamal and adjacent areas is clearly insufficient in comparison with more southern regions

Summary

Источник финансирования

Исследования проводятся в рамках госбюджетной темы ИГГ УрО РАН No АААА-А18-118052590032-6 “Палеогеодинамика и эволюция структурно-вещественных комплексов при формировании земной коры континентального типа”, при поддержке проекта РФФИ No 18-05-70016 “Геологическое строение и эволюция кристаллического фундамента и рифтового комплекса полуострова Ямал и сопредельных территорий Арктической части Западно-Сибирского нефтегазоносного мегабассейна”. The knowledge of the deep horizons of the earth’s crust and mantle within the Yamal and adjacent areas is clearly insufficient in comparison with more southern regions. The Western Yamal positive thermal anomaly indicates a region of a high geodynamic activity permeable for deep fluid-gas streams. The location of Yamal on a slightly raised shoulder of this anomalous region has determined the high oil and gas potential of this peninsula. (2020) Heat flux density, mantle structure and oil and gas potential of the Yamal Peninsula (Arctic). Funding information The research was carried out within the framework of the RFBR project No 18-05-70016 “Geological structure and evolution of the crystal basement and rift complex of the Yamal Peninsula and adjacent territories”. The manuscript was prepared in the framework of the state budget topic of the IGG UB RAS No AAAA-A18-118052590032-6 “Paleogeodynam ics and evoution of structural-material complexes during the formation of the continental-type crust (by the example of the Ural-Mongolian folded belt and the West Siberian platform)”

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