The Lithological and Geochemical Characteristics of Natural Outcrops of Domanik Sediments in the Areas of the Cis-Ural Regional Trough of the Volga–Ural Oil-and-Gas Basin

Abstract

The problem of replenishing oil reserves requires a search for new alternative objects for prospecting, exploration, and production of hydrocarbons. The rocks of the Domanik sediments, which are rich in organic matter and occur widely over the Volga–Ural oil-and-gas basin, are among the objects. The Domanik highly carbonaceous formation is a thin-layered carbonate–siliceous structure with an increased content of organic matter, which is capable of both generating hydrocarbons in the proper oil-and-gas parental masses and concentrating oil and gas within individual layers and zones that function as the reservoirs (Stupakova et al., 2017). Studies of the material composition of the rocks are among the ways to obtain data on the nature of hydrocarbon accumulations in domanik sediments along with the potential of the recovery of hydrocarbons. Lithological and geochemical characteristics are essential constituents of the studies of the rocks.