Measures for protection of water resources

Wastewater recycling allows the Company to maintain low specific water consumption — below 2 cubic meters of water per tonne of oil produced.

«Surgutneftegas» PJSC evaluated soft groundwater reserves at all water intake points with the production rate over 100 cubic meters per day. There are sanitary protection zones developed for all drinking water intake points, their designs have received positive sanitary-epidemiological conclusion.

All treated wastewater from the Company’s field facilities serves as injectant for a reservoir pressure maintenance system to save freshwater from the surface and underground water bodies. In 2017, about 446.5 million cubic meters of sewage and formation water, including about 3.3 million cubic meters in the Republic of Sakha (Yakutia), was injected. The total volume of treated household water injected to maintain reservoir pressure in the reporting year was 4.2 million cubic meters, including 2.6 million cubic meters in the Republic of Sakha (Yakutia).

Effluents from «Surgutneftegas» PJSC facilities located in the Yakut village of Vitim are discharged into biological treatment facilities, and further streamed to the Romanovsky Klyuch brook after being cleaned to the required standard.

Throughout its area of operations, the Company implements the program of construction of initial water separation units based on three-phase separators, which are usually mounted on booster pump stations and are designed to separate the water-oil emulsion and bring the water to the requirements of the relevant standards. IWSU enables to efficiently separate produced formation water for its further use in maintaining reservoir pressure, thereby reducing the corrosion load on the pipeline and the volume of water abstraction from surface and groundwater bodies.

Much consideration is given to construction of other water protection facilities. In 2017, drain tanks were installed at 21 well pads, ramps were reconstructed at 80 sites. In the reporting year, the capital investments in construction of water protecting facilities totaled RUB 111.55 million, and more than RUB 522 million is planned for expenditures in 2018.