COMPREHENSIVE STUDY OF THE STRUCTURE OF THE HOLLOW SPACE OF DOMANIC DEPOSITS OF ONE OF THE ME-WATCHMEN OF THE NORTHERN PART OF THE BASHKIR ARCH (REPUBLIC OF BASHKORTOSTAN)

Abstract

A comprehensive multi-scale study of the capacitive space was carried out, which allows at different levels to obtain data on the type, morphology and distribution of the hollow space of the rocks of the Domanic stratum of one of the deposits in the northern part of the Bashkir arch. It has been shown that the reservoir properties of the rocks are quite low, while most of the voids are filled with highly viscous hydrocarbons. Siliceous-carbonate and carbonaceous-siliceous highcarbonaceous rocks have the best reservoir properties. The void space in the core samples is mainly of the porous-fractured type, the cavernporous-fractured type is locally noted. The formation of voids is due to both sedimentation and post-sedimentation factors and is associated with the processes of recrystallization, dolomitization, leaching and cracking. Microtomographic studies of high-angle-related rocks made it possible to study local zones and obtain data on the microstructure and capacitive characteristics of the void space in areas not accessible for decoding by other methods. It has been shown that a significant part of the voids in high-carbon rocks is confined to the shells of tentaculites and there is an increase in porosity in these areas.