Waste management measures
Annually, the operation activity of the Company results in nearly 800 thousand tonnes of production and consumption wastes, three fourth of which is drill cuttings.
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. To minimize the negative environmental impact of production, Surgutneftegas strives to reduce drilling waste generation, to exclude toxic chemicals in preparation of drilling fluids. In 2019, drill cuttings utilization level in “Surgutneftegas” PJSC was over 75%.
Another particular type of waste generated during oil production is oil sludge that makes up 2.2% 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 (0.414 thousand tonnes in total).
The use of these facilities allowed the Company in 2019 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%.
All mercury containing waste of hazard class I (27.34 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 clean-up (settling).
For utilization of worn-out car tires, a modern complex for recycling 100% of tires with fabric and metal cord is used. The Company makes a certified product — rubber chips — used at asphalt-concrete plants of Surgutneftegas to modify bitumen. The use of this equipment along with the environmental effect (prevention of disposal of production waste at landfills) makes it possible to improve the quality of a hard surface road and to profit from the sale of the product in demand — rubber chips.
The Company sells recyclable material obtained by grinding paper and polymer-containing waste products, as well as by pressing cardboard.