“…More than 380 oil fields have been discovered. Among them, thirty-four can be attributed to the main operating ones: Avralinsky, Aglossky, Alakaevsky, Alekseevsky, Alimovsky, Altukhovsky, Bulatovsky, Verkhne-Gaysky, Vozdvizhensky, Gorodetsky, Dmitrievsky, Zhigulevsky, Zhukovsky, Zarechensky, Zolnyovrazhny, Kazakovsky, Kalmajursky, Karlovo-Sytovsky, Kokhanovsky, Kryukovsky, Malochernigovsky, Mamurinsky, Mikhailovsky, Mukhanovsky, Pokrovsky, Radaevsky, Sbornovsky, Sernovodsky, Syzransko-Zaborovsky, Tuvinsky, Yablonovoovrazhny, Yakushkinsky, Yaurkinsky (figure 2) [10][11][12]. For the years 2016-2019, the average annual volume of oil production in the region amounted to more than 16 million tons.…”