Influence of the late Proterozoic of the Kama-Belsky aulacogen on the formation of the types of traps the oil in the Paleozoic sediments in Aktanysh-Сhishmy sag

UDK: УДК 553.98.061.4
Key words: oil-and-gas province, trap, deflection, tectonic structure, field
Authors: I.A. Larochkina (LUKOIL-Engineering LLC, RF, Moscow)

The oldest in the Volga-Ural oil and gas province of Russia in the last years a trend of steady increase in oil reserves due to geological exploration work. High efficiency of exploration works associated here primarily with the Kama-Kinel system deflections. Aktanysh-Chishmy sag in the Eastern part of Tatarstan and in the Western part of Bashkortostan is considered. Mapping of geological structure in two fragments of Aktanysh-Chishmy deflection, shows that between them there are significant differences. The root cause are different mechanisms of their formation. In terms of morphogenesis Aktanysh-Chishmy deflection on the territory of Bashkortostan was influenced by an active tectonic regime at the same time the two basement – Kama-Belsky and Sergius-Abdulinskiy and the Paleozoic in the setting of inherited high dynamics of tectonic movements that created the geological conditions conducive to the formation of various genetic types of oil traps. In the formation of Aktanysh-Chishmy deflection on the territory of Tatarstan high tectonic stress covered only the North-East side and the greater part of the axial zone, controlled by the Kama-Belsky aulacogen by. The South-Western side of the Flex zone and the adjoining smaller part of the axial zone, located on the slopes of the South-Tatar arch, formed in a calm tectonic setting.

Thus, the prospects of tectonic elements of different orders in Aktanysh-Chishmy deflection to a certain extent depend on the extent of the impact of Kama-Belsky and Sergius-Abdulinskiy aulacogens and on the formation of sedimentary strata of Paleozoic sediments and the formation of types of traps in the productive complexes.

The highest prospects for the discovery of new oil fields are in the productive horizons in the Paleozoic sediments in Aktanysh-Chishmy deflection on the territory of Tatarstan and Bashkortostan in the part, which is planned in accordance with the late Proterozoic aulacogens.
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