On some features of the structure of the tournaisian deposits on uplifts with visean-age cuts

Arefyev Yu.M. Institute for Problems Ecology and Subsoil Use of the Academy of Sciences of the Republic of Tatarstan Kazan
Andreeva E.E. aee8277@rambler.ru Institute for Problems Ecology and Subsoil Use of the Academy of Sciences of the Republic of Tatarstan Kazan
Baranova A.G. Institute for Problems Ecology and Subsoil Use of the Academy of Sciences of the Republic of Tatarstan Kazan
Ionov G.M. “Kara Altyn Enterprise” CJS Almetyevsk
DOI: 10.24412/2076-6785-2021-3-10-13

Abstract
The article devoted to the problem of reliable estimation of oil reserves of the tournaisian deposits on uplifts with different-depth visean-age cuts. The main purpose of this work: to identify the geological factors that determine the structure of the tournaisian deposits and influence the assessment of their reserves. On the studied uplift, the Tournaisian deposit is an eroded surface of the carbonate deposits of the kizelovian, cherepet, and upino-malevsky horizons, filled with terrigenous sand-clay material of the tula-bobrikovsky age, containing oil-saturated sand layers that most likely have a hydrodynamic connection with the main tournaisian deposit.

Materials and methods
Studying a structural map fragment of the West-Rakashev local uplift, well logging curves and logging conclusions for lower carboniferousage productive sediments; geological profile of lower carboniferous deposits on the studied local uplift.

Keywords
tournaisian deposits, Melekess depression, oil deposit, visean-ag cuts, carbonate reservoir
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