Geology, geography and global energy

Scientific and Technical Journal

FEATURES OF THE GEOLOGICAL STRUCTURE NORTH-EAST OF THE ASTRAKHAN ARCH

2020. №1, pp. 45-49

Fedorova Nadezhda F. - Astrakhan State University, nadezhda.fedorova.59@inbox.ru

The relevance of the work is due to the scientific justification of the materials of geological exploration - seismic exploration and drilling of wells to study the North-Eastern part of the Astrakhan arch for exploration within the Elenovskaya area (120 km). The purpose of the study is to analyze geological materials for dividing the section of this territory and to clarify its lithological and stratigraphic characteristics, as well as petrophysical properties of rocks. The methodology of the study was based on data processing of field Geophysics materials - seismic survey and field - geological studies performed during drilling. The author studied the geological features of subsalt deposits based on the materials of three - dimensional seismic SURVEY 3D OGT-64 and area seismic survey 2D, as well as core and slurry materials based on drilling data Elenovskaya area and associated territories. In the Northern and North-Eastern borders of the Astrakhan region, the Kharabalinsk - elenovskaya zone stretches for 150 km. A number of local uplifts were mapped by seismic works within this zone. As part of the sub - salt Paleozoic sedimentary cover within the Elenov structure, there are 4 lithological - stratigraphic complexes with different degrees of study. The productivity of the Elenovskaya square section is determined by the activity of zonal tectonic movements. The main prospects of oil and gas potential by analogy with other areas of the Caspian and Volga-Ural oil and gas provinces are associated with the terrigenous formation of the Devon.

Key words: Астраханский свод, Еленовская структура, подсолевые отложения, литологофациальный фактор, трещиноватость, кавернозность, пористость, Astrakhan arch, elenovskaya structure, sub-salt deposits, lithofacial factor, fracturing, cavernous, porosity

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