Geology, geography and global energy

Scientific and Technical Journal

Geological features of the Usish license area in the Astrakhan region

2018. №4, pp. 74-78

Amirkhanov N.A. - Applicant for a Scientific Degree of C.Sc. in Geology and Mineralogy, NefteGazInvest LLC, 5 Severnaya st., Trusovo Settlement, Narimanovsky District, Astrakhan Region, 416109, Russian Federation,

Golchikova N.N. - D.Sc. in Geology and Mineralogy, Associate Professor, Astrakhan State Technical University, 16 Tatishchev st., Astrakhan, 414056, Russian Federation,

This article describes the features of the geological structure of the license area in order to determine the possible prospects of petroleum potential. The presented work is relevant because the issue of oil and gas presence of the new license area is being considered, which will help in the future to increase the hydrocarbon reserves of the Russian Federation. The study of the license area may lead to the discovery of a new field. The over-salt deposits of the southwestern part of the Caspian depression are described, which are represented by Upper Permian-Triassic terrigenous and Jurassic-Cretaceous carbonate-terrigenous sediments. In the study area salt arrays and local salt domes are widely distributed. The main geostructural elements are the Sarpinsky trough and the Astrakhan arch. The western slope of the Astrakhan arch is complicated by a north-eastern strike fault that separates it from the Sarpinsky trough. The north-western part immediately adjacent to the Astrakhan arch is called the Enotaev Depression Zone. The proximity to well-known deposits, the location on the migration routes of hydrocarbons from the Sarpinsky trough and the high hypsometric position of the structure, as well as the established gas content of the Baskunchak deposits, suggest the Ushishinsky license area as promising. By analogy with the Bugrinsky and North-Shadzhinsky gas fields, gas deposits are predicted: in the lower Triassic (vetluzhsky, Baskunchaksky), middle Triassic (Anisian longline) sediments.

Key words: Прикаспийская впадина, Сарпинский прогиб, Астраханский свод, Воропаевская структура, Усишинский лицензионный участок, Caspian depression, Sarpinsky trough, Astrakhan arch, Voropayev structure, Usishinsky license area