Soldatkin Stepan Innokentievich RussiaSaratovSaratov State University, 83, Astrakhanskaya Str., Saratov, 410012, Russiaassociate professorк.г.-м.н.Soldatkin_stepan@mail.ru Author's articles Peculiarities of Formation of Anthropogenic Hydrochemical Anomalies in Groundwater within the Oil and Gas Fields