Gas production

At the yearend 2025, the actual gas production of RussNeft amounted to 2.104 bn m³, including 282.3 mln m³ of natural gas and 1,821.4 mln m³ of associated petroleum gas. The level of gas utilization at the yearend was maintained at 96.8 %, thus having met the state's requirement aimed at maximally reducing the negative impact of production on the environment.

Program of efficient use of associated petroleum gas (APG)

The Company's current objective is to maintain the rational use of associated petroleum gas, improve the energy efficiency of oil production, and reduce greenhouse gas emissions. This activity will be pursued in the framework of the corporate program developed for 2024-2028. In accordance with it, funding for a number of major engineering and gas infrastructure facilities is planned.

Gas business

The gas business development is one of the priorities for the Company. In 2022, a decision was made to implement a project for technical upgrading of the Stepnovsky oil treatment area in the Saratov region as one of the components of the conducted large-scale upgrade of the gas compressor unit with a capacity of more than 50 mln m³/year. Completion of the project is scheduled for 2026.

In 2024, measures were taken to meet the requirements of the Eurasian Economic Union`s technical regulations "On the safety of combustible natural gas prepared for transportation and (or) use".

Oil and gas exploration and reserves

The total number of oilfields is 120 (State Register of Reserves of the Russian Federation as of 01.01.2026).

The Company's enterprises are divided according to territorial and operational criteria into the following groups:

• West Siberian
• Volga Region
• Central Siberian

The oil and gas content of the fields within the boundaries of the Volga group is associated with terrigenous and carbonate rocks of the Middle-Lower Carboniferous and Devonian, while in the West Siberian and Central Siberian regions with deposits of the Upper Jurassic and Neocomian.

The prospects for the discovery of new oil and gas deposits, as well as the expansion of the oil-bearing capacity of previously discovered fields, are related to the strategy for stable implementation of the exploration program with a focus on the detailed high-quality CDP (common depth point)-2D/3D seismic surveys and to the strategy of successful prospecting, appraisal and exploration drilling.

It is worth noting, that lately the hard-to-recover and unconventional reserves have become the main sources of replenishment of the reserves portfolio for the medium term. The growth of competencies in research and industrial development of HTR, the analysis of ongoing retrospective exploration work and generalization of its results allow us to promptly rank projects in the Company, identifying the most promising areas of development (eg: Verkhne-Shapshinskoye, Tagrinskoye, Vostochno-Kamennoye, Zapadno-Varioganskoye fields).

Since 2017, the Company has continued active industrial development of deposits of the Achimov sequence based on the results of a comprehensive methodological approach to the study of productive sediments of the Verkhne-Shapshinskoye field. In total, since 2017, reserves evolution for the Achimov deposits of the Verkhne-Shapshinskoye field have amounted to more than 42 million tons of oil.

At the Nizhnevartovsk branch, geological exploration of the Achimov deposits at the Tagrinskoye field continues orderly. The results obtained, combined with the ongoing seismic surveys, make it possible to positively assess the prospects for the spread of productive deposits in the southern and western parts of the subsurface area, which determines a positive development vector in the medium term. The implementation of the 2024-2025 production drilling program at the Tagrinsky license area confirms the high productivity of geological exploration and allows for the real-time adaptation of the Achimov formation seismic model to specific tasks. Since 2015, the total changes in oil reserves in the Achimov formation of the Tagrinskoye field have amounted to more than 46 million tons, while HTR reserves in the field as a whole have increased by more than 75 million tons. As part of the geological exploration of the Tagrinskoye field, the right to use the Koltogorsky 4 license area (2024) was obtained. This license area is adjacent to the northeastern part of the Tagrinskoye subsoil area. Preliminary results from office seismic surveys conducted at the Tagrinskoye field indicate that the Koltogorsky 4 block has relatively high prospects. The primary exploration target is the productive deposits of the Achimov formation.

Following the implementation of the geological prospecting and exploration and production drilling program in 2025, the change in liquid hydrocarbon reserves amounted to more than 10 million tons. The main change in 2025 was the increase in oil reserves at the Vostochno-Kamenny field, which amounted to approximately 6 million tons of oil. There was also a significant increase in reserves at the Verkhne-Shapshinskoye and Tagrinskoye fields, amounting to 4 and 1 million tons of oil, respectively.

In the 2024-2025 field season, the Company, in the territory of the Khanty-Mansi Autonomous Okrug - Yugra, carried out CDPM-3D seismic exploration work in the amount of 245 km² at the Tagrinsky license area, as well as CDPM-3D office seismic surveys in the amount of 1,055 km². This extensive seismic survey resulted in the creation of a unified 3D seismic model of the Tagrinskoye field using modern techniques. This made it possible to detail the geological structure, identify tectonic features, and perform sequence stratigraphic analysis of the Achimov deposits, accumulating additional information and using it to identify promising strata and zones not covered by the current well pattern. In addition, as part of the prescribed work to further study the deposits of the Achimov formation and assess further development prospects, CDPM-3D seismic exploration work in the volume of 226 km² is scheduled for the 2025-2026 field season in the Koltogorsky 4 license area.

In order to annually replenish the mineral resource base, the Company plans to maintain the exploration policy based on:

• search and exploration of new hydrocarbon deposits in oil and gas-bearing horizons due to prospecting, appraisal and exploratory drilling, as well as advanced production drilling;
• improving the efficiency of prospecting, appraisal and exploratory drilling by improving the quality of CDPM - 2D/3D seismic surveys, enabling detailed study of complex hydrocarbon traps, including in deep-lying complexes represented by hard-to-recover reserves and unconventional reservoirs;
• expanding the boundaries of the oil and gas potential of already identified deposits;
• acquisition of potentially promising new subsoil areas based on geological, as well as technical and economic assessments.