Waste management measures
Annually, the operation activity of the Company results in nearly 800 thousand tonnes of production and consumption wastes, the greater part of which (more than 70%) consists of drill cuttings. To minimize the negative environmental impact of production, Surgutneftegas strives to reduce drilling waste generation, to exclude toxic chemicals in preparation of drilling fluids.
Environmentally friendly and resource saving technology of pitless drilling is employed in Western Siberia; it is certified by the State Environmental Expert Commission on a federal level. Decontaminated drill cuttings are used as soil during earth fill construction on well pads. BAT application not only allows «Surgutneftegas» PJSC to reach a 75% drill cuttings recycling level and drill wells in areas with a special mode of management, but also avoid drill cuttings transportation to utilization sites and necessity to dispose and bury it.
Another particular type of waste generated during oil production is oil sludge that makes up 6.7% of the total waste generated by the Company. There are single and multiple cell sludge storage ponds in «Surgutneftegas» PJSC that collect oil sludge and drill cuttings, oil containing fluids and contaminated soil for further treatment and decontamination all year round. Decontamination of oil sludge and oily soils is performed by a panning method at six centers and four upgraded lines for fluid phase recycling. Decontamination of oil sludge by a thermal method is performed using 10 Szhigatel incineration units.
The Company uses 21 Forsazh thermal destruction units for thermal decontamination of oily waste cloth, filters and other solid oily waste (0.392 thousand tonnes in total).
The use of these facilities allowed the Company in 2018 to prevent the burial of over 60,000 cubic meters of oil sludge and oily soils every year, the level of their decontamination reaches 100%.
In 2018, «Surgutneftegas» PJSC completed the construction of a site for disposal, accumulation and decontamination of production and consumption waste at the
All mercury containing waste of hazard class I (31.04 tonnes) has been transferred to specialized companies for further decontamination in accordance with current agreements.
Used oils generated in the course of various technological processes of «Surgutneftegas» PJSC oil and gas production divisions are fully utilized into commercial oil after
For utilization of
The Company sells recyclable material obtained by grinding paper and