Geochemical and hydrogeological oil and gas exploration was carried out in the west of the Siberian platform in the basin of the river Podkamennaya Tun-guska, where 6 thousand groundwater sources and streams have been studied. The main informative hydrogeochemical indicators in the Tunguska basin in the upper hydrodynamic zone are: the type of water, the nature of mineralization, the content of chlorides, sulfates, bromine, iodine, some organic substances and microelements, as well as an

more »

... or of water metamorphization. 150 hydrogeochemical anomalies associated mainly with geodynamic active zones have been established. In general, all the studied hydrogeochemical indicators indicate a good closure of deep horizons and a favorable environment for the preservation of deposits in the depths of local positive structures.