TY JOUR TI Localization of stock of abandoned wells and typification of territory of Astrakhan region by levels of environmental risk KW aquifer KW degree of protection KW ecological risk KW abandoned deep well KW Astrakhan region KW lithofacies structure JO Oil and gas technologies and environmental safety AU Kudinov, V.. AU Golchikova, N.N. PY 2023 IS PB Astrakhan State Technical University