Hydrogeology of the artesian basins of the southern part of the Kara sea and Yamal-Gydansk megasaddle

Background. In hydrogeological terms, the territory of Barents-Kara shelf has not been studied in sufficient detail. The data on its zoning are based mainly results research undertaken 1970s, when attempts were made to isolate artesian basins according a set indicators oil and gas content. Currently, position basin boundaries can be adjusted using current from geological testing wells. Aim. To conduct southern part Kara Sea north West Siberian geosyneclise, including structures — South syneclise Yamal-Gydan megasaddle, as well carry out chemical analysis groundwater Jurassic-Cretaceous aquifer complexes composing sediments sedimentary cover basin. Materials methods. A cartographic method was used analyze earlier maps schemes Russian sector continental slope Arctic Ocean, then determine identified basins. For groundwater, wells drilled at Zapolyarnoye condensate field used. Results. two submarine semi-marine, corresponding same-name prospective having same structure, determined. Both characterised by presence main Mesozoic floor Western Siberia. When studying composition deposit, it found that types water change regularly with depth an increase content hydrocarbonate ion due possible migration fluids enriched carbonic acid dioxide rocks foundation. Conclusion. determined wide distribution gas-bearing exploration maturity cover. characterized unified genesis.