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PETROLEUM POTENTIAL OF THE TETERE ZONE OF THE KATANGA PETROLEUM REGION

N. V. Melnikov

Siberian research institute of geology, geophysics and mineral resourses, Novosibirsk, Russia

The Tetere zone of possible petroleum potential is included in the Katanga and Nepa-Botuoba PRs of the Lena-Tunguska PP of the Siberian Platform. The zone is administratively located in the Katanga District of the Evenki Autonomous Okrug, partly in the Irkutsk Region. The amplitude disjunctive dislocations detected by seismic divide the trap into three blocks that made up license areas – Kulindinskiy (northern), Teterskiy (central) and Chulakanskiy (southern). The high prospectivity of the Tetere structural and lithological trap is predicted by flattening the monocline on the western slope of the Nepa-Botuoba anteclise. The flattening stops migration flows of hydrocarbons from the Prisayan-Yenisey syneclise. 2D seismic survey was conducted, disjunctively confined traps were identified, where one well was drilled for each trap after licensing at the Kulindinskiy and Teterskiy areas. Geological exploration has been stopped. Works on the Chulakanskiy area have not been started yet. Therefore, the model of the geological petroleum structure of the Kulindinskiy and Teterskiy areas has been specified again. The large Mongot swell, as the main prospect of oil prospecting in the Tetere zone, has been revealed by the Vanavarskaya Formation top.

Keywords: Tetere zone, Kulindinskiy, Teterskiy areas, Mongot swell, Katanga saddle, Vanavarskaya Formation, productive strata.

DOI 10.20403/2078-0575-2019-2-65-76