The Impact of Structural-Geodynamic Systems on the Formation and Distribution of Hydrocarbon Potential in the Black Sea-Caspian Region

The article presents the results of reconstruction and analysis of geodynamic conditions for the formation of the main structural elements in the Black Sea-Caspian region. The paper considers the basement and the sedimentary cover, united by the same type of reaction from an external or internal source of tectonic energy. The results of the research indicate that the predominantly offshore deep water Black Sea and South Caspian provinces are controlled by tectonic mega depressions that formed in the Alpine and recent epochs of tectogenesis. At the same time, both provinces include in their internal structure both elements that arose at different stages of Alpine and recent structure formation, as well as fragments of older plate and folded structures, reworked in these epochs and buried under Cenozoic or Cretaceous-Cenozoic deposits to varying degrees. The latter, in turn, partially or completely controls the position and configuration of the oil and gas regions within these provinces. We supplemented the data on the phase composition of hydrocarbon deposits with the results of the analysis of the location of deposits in relation to structural-geodynamic and basin systems of different ages. This allowed us to present a predictive scheme of zones of possible predominance of various types of fluids in the composition of potential accumulations and manifestations of hydrocarbons in the territories and offshore area of the region.