Non-anticline traps of the Riphean and Vendian Tunguska syneclise at the search and exploration stage

Yurova M.P. Institute of Oil and Gas Problems Moscow
DOI: 10.24411/2076-6785-2020-10118

The article deals with one of the most promising oil and gas bearing areas of Eastern Siberia — the Tunguska oil and gas area. In the history of the formation of this region, trap volcanism was repeatedly manifested (Riphean, Vendian-
Cambrian, lower Paleozoic, middle Paleozoic, upper Paleozoic-Triassic and Jurassic-Cretaceous periods). In the section, two structural floors are distinguished: the granitoids of the basement (Archean-lower Paleozoic) and the Riphean-
Phanerozoic sedimentary cover, which were given the main attention in the work. Three zones of oil-and-gas potential of the Riphean, Vendian, and lower Cambrian deposits are identified. According to the results of drilled wells and
seismic studies, the Tunguska syneclise is currently the most promising area in Eastern Siberia where non-anticline traps (tectonically and lithologically shielded) can be discovered.

Materials and methods
Generalization of published geological and geophysical materials of the Tunguska petroleum region of Eastern Siberia. The use of seismic survey, high-precision gravimetry, electro – and aeromagnetic data, information on stratigraphic wells.

Tunguska syneclise, Eastern Siberia, Riphean, Vend, seismic studies, reference wells, prospective sites, non-structural (lithologically-shielded, tectonically-shielded) traps
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