Specifics of the Geological Structure of the Alakol Basin and the Choice of Drilling Well Design

Based on geological and geophysical data, a lithological and stratigraphic section of the basement and sedimentary cover of the Alakol basin was compiled, detailing the lithological and paleogeographic settings. Oil source rocks, reservoirs and seals are identified. The tectonic zoning scheme is substantiated, the structural characteristics of the faults and the lithologic-facial features of the section are given. A complex multi-stage tectonic evolution has been identified. Potentially promising stratigraphic oil and gas complexes have been identified – Jurassic (Mesozoic) and Upper Devonian (Famennian) – Lower Carboniferous-Permian (Paleozoic). The deep structure of the region is illustrated by a geological and geophysical section. The correlation of the stratigraphic range of hydrocarbon potential of the Alakol basin was carried out. A probabilistic forecast for the search for crude hydrocarbons is substantiated. On this geological and geophysical basis, the design of the borehole was developed and its position for opening the cover and basement rocks was outlined.