Total number of subsoil licenses held by the companies incorporated in OAO NK “RussNeft”: 164
Total number of oilfields: 166
Subsurface using subsidiaries of the Company are segregated into the following groups on the location basis :
1. West Siberia group
2. Ural group
3. Volga group
4. Central Siberia group
Oil bearing capacities of Ural and Volga group belong to terrigenous and carbonate rocks of middle to lower Carbon and Devon; West Siberia group belongs to Neocomian and Malm.
Oil & gas discovery potential depends on increase of volumes and degree of detail of qualitative 2D/3D seismic and prospecting and exploration drilling both at the identified deposits and at newly acquired blocks.
In 2012 growth of reserves ABC1+C2 surpassed production substantially (by 49%).
A new oil deposit was discovered in reservoir Þ1-2 of Fediushkinskoye oilfield; category C1 oil reserves of Achimovsky deposits at Verkhne-Shapshinskoye oilfield were included in the State balance sheet. Development drilling works resulted in expanding the boundaries of the deposits in Þ1 group reservoirs at Novo-Aganskoye and Duklinskoye oilfields; in group ÁÂ8 sand formations at Roskavlskoye and Malobalykskoye oilfields in West Siberia. Commercial oil reserves in Tournasisan deposits of Yakshur-Bodiinskoye and Verkhozimskoye oilfields, in the group of Vereiskian-Bashkirian formations at Rudnevskoye and Yuzhno-Vishenskoye and in Kashiro-Vereiskian at Zolotarevskoye oilfields have grown. 3D seismic works performed in Mauritania and Azerbaijan within the frames of OAO NK RussNeft participation in overseas projects.
With the aim of annual reserves replacement RussNeft intends to implement in the short term the geologic exploration policy, based on:
1. Exploration and prospecting of new hydrocarbon deposits in deep-seated oil and gas bearing horizons mainly through additional deepening of production wells
2. Increase of prospecting and exploration drilling efficiency based on improving 2D and 3D seismic quality permitting to map complex HC traps in details, including the traps in deep-seating formations.
3. Acquisition of potentially promising new subsurface areas on the basis of the geologic, engineering and economic evaluation.
4. Prospection and exploration of new oilfields and HC deposits within the boundaries of the existing license areas.
OAO NK RussNeft has at its disposal the results of appraisal and independent audit of oil and gas reserves as of 01.01. 2013.
According to the data audited by Miller and Lents (USA), the total amount of the reserves of all the companies incorporated in OAO NK RussNeft as of 01.01. 2013 is as follows:
Proved reserves: 1 648.836 mbbls;
Probable reserves: 642.101 mbbls;
Possible reserves: 809.091 mbbls.
Proved reserves: 1 060 321 mcbf;
Probable reserves: 315 694 mcbf;
Possible reserves: 298 806 mcbf.
Oil and gas reserves were evaluated following new SPE/WPC/AAPG/SPEE (Society of Petroleum Engineers-US SPE, World Petroleum Congress - WPC and Society of Petroleum Evaluation Engineers - SPEE) requirements, enacted on March 28, 2007.