Saban V. Improving of the hydrosphere anthropogenic pollution reducing methods on the final stage of oil fields exploration (Dolyna oil field case study).

The object of research – the processes of environmental pollution with mineralized waters in the process of oilfields exploitation of Dolyna oil and gas area on the final stage of exploitation. The subject of research – the reduction of technogenic groundwater pollution in the area of oil fields exploitation. Methodology – the methodological basis of research is based on complex, that includes the current state analysis of ecological situation in the area of oil fields exploitation; hydrodynamic methods of installing filtration parameters of lost circulation horizon; geochemical methods, that includes the selection and analysis of subsoil and mineralized waters samples in the area of oil extraction in Dolyna oil and gas area; the methods of mathematical modeling of long-term migration of reclaimed fossil water in groundwater; laboratory methods, that includes the technology of reclaimed fossil water preparation for discharging into productive horizon of oil fields in Subcarpathia. The level of application – the technological diagram for sewage treatment is applied; the way of mudding formation removal from layers, that suppress hydrocarbon on the areas of public company “Ukrnafta”. The sphere of application - mining enterprises.