Influence of structural-geodynamic systems on formation and distribution of hydrocarbon potential of the Black Sea-Caspian region

Abstract

The article considers the results of the reconstruction and analysis of the geodynamic conditions for the formation of the main elements of their structure in the Black Sea-Caspian region, expressed in the features of the distribution of its structural-geodynamic systems of different ages. As structural-geodynamic systems, sets of elements of the block and zonal structure of the upper part of the earth's crust (basement and sedimentary cover) are considered, united by the same type (general) reaction from an external or internal source of tectonic energy in relation to the system during a certain phase of tectogenesis. The results of the research indicate that the predominantly offshore deep-water Black Sea and South Caspian provinces are controlled by tectonic megadepressions 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, and 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 control the position and configuration of the oil and gas regions within these provinces. Keywords: structural and geodynamic systems; sedimentary basins of different ages; oil and gas source strata; prospects for oil and gas potential; phase composition; hydrocarbon potential.