К.О. Sobornov
 
Wedge-shaped thrusts of the southern flank of the Terek-Caspian foredeep: structure, development and petroleum prospectivity
DOI 10.31087/0016-7894-2019-6-19-30

The southern flank of the Terek-Caspian foredeep is the oldest oil and gas producing region of Russia. The area is relatively well studied and regarded to as highly mature with declining production of oil and gas. Revision of modern geological and geophysical database provided important new insight into structure of the fold belt. Of special interest is the documentation of the wide occurrence of wedge-shaped thrust zones delaminating the sedimentary cover of the foredeep along the Maykop (Oligocene-Lower Miocene) shale. The allochthonous assemblage is interpreted to include some large untested duplex structures, which do not have direct manifestation in the near surface strata. They are primarily developed in front of the Dagestan promontory. Additional exploration opportunities are related to intra- and sub-salt deposits in the Terek-Sunzha fold zone.

Key words: Terek-Сaspain foredeep; Greater Caucasus; fold and thrust zones; wedge-shaped thrusts; salts; delamination of sedimentary cover; oil and gas fields; new prospects.

For citation: Sobornov K.O. Wedge-shaped thrusts of the southern flank of the Terek-Caspian foredeep: structure, development and petroleum prospectivity. Geologiya nefti i gaza. 2019;(6):19–30. DOI: 10.31087/0016-7894-2019-6-19-30.

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К.О. Sobornov

North Uralian Petroleum Company, Moscow, Russia;

ksobornov@yandex.ru