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Main page Business Upstream Geological prospecting
Geological prospecting

In 2016, based on the geological prospecting, 13 fields and 127 new deposits with the total reserves of 207 million ton of oil equivalent were discovered. The replacement of hydrocarbon reserves of industrial categories ABC1 amounted to 354 million TOE or 126% of the production in the territory of the Russian Federation. The replacement factor for new reserves has been significantly above 100% for over ten years.

All program work was performed at a high level. 85 prospecting and exploration wells were test- completed, 222 thousand meters of rock were drilled. 79%of exploration drilling was successful. 2D seismic survey was performed at 2.8 thousand lin. km (+27% above 2015); 3D seismic survey was performed at 7.9 thousand square km (+29% above 2015)

Western Siberia

The reserves increment in Western Siberia amounted to 133 million tons of oil and condensate and 87 billion cubic meters of gas. 37 prospecting and exploration wells were test-completed with a success rate of 89%. 45 new deposits with the total reserve of 59 million tons of AB1С1 + В2С2 were discovered.

In order to establish new areas for prospecting and exploration, the Company commenced a number of targeted innovation projects. The studies are aimed at developing localization techniques, estimating the counting parameters and justifying technologies for developing hydrocarbon deposits in low-permeability and unconventional reservoirs. The research is focused on the deposits of Bazhenov, Berezovsky and Tyumen formations. The obtained results of the well tests allow to presume on new discoveries. 

Eastern Siberia and the Far East

The total increase in reserves in Eastern Siberia and the Far East amounted to 21.2 million tons of oil and condensate and 29 billion cubic meters of gas. 11 exploration wells were completed with a success rate of 55%. 5 new deposits with reserves of 39 million TOE were discovered.

The most significant discoveries were made in the Irkutsk region. Based on the results of drilling and testing of the prospecting and exploration well 3P at the Verkhnichersky site, a large field of the same name was discovered and registered with the state. Category С1 + С2 reserves have been estimated at 60.7 million tons of oil equivalent. Upon testing the focus location, the Lower Ust-Kut formation, the oil influx rate was obtained at a flow rate of 278 m3/day. In the Preobrazhensky location, in Lisovsky field, following the drilling and testing of exploration well No. 8, industrial oil and gas potential was established for a new type of formation: reefs in the Osinsky formation. This discovery has determined new prospects for geological exploration within the Nepa-Botuoba anteclise.

At the Kuyumba project in Krasnoyarsk Territory, an exploration well with horizontal sidetrack confirmed the forecast highly productive zone in the Riphean carbonate deposits. The forecast was made based on the high-tech method for processing and interpreting 3D seismic materials, developed by the Company. The dual-bore cluster well (pilot vertical and horizontal boreholes) allowed to increase the area of incremental reserves and to achieve the oil flow to surface at a flow rate of ~ 200 m3 / day.

Central Russia, Timan-Pechora and the South of Russia

In 2016, the total incremental reserves in the Volga-Ural region, Timan-Pechora and in the south of Russia amounted to 59.9 million tons of oil and condensate and 4.8 billion cubic meters of gas. 37 wells were completed with a success rate of 76%.

In the Nenetsky Autonomous District, the Nertsetinsky field was discovered, with reserves of 21.4 million TOE. 11 fields and 77 new deposits were discovered in the Samara Region, Orenburg Region and the Udmurt Republic. At the Volostnovskoye license block (Orenburg Region), the forecast oil-bearing capacity of the Devonian reef masses, previously estimated by the specialists of the Company’s Tyumen Petroleum Scientific Center, were estimated at 30 million ton, with an annual oil production potential of 1.5 - 2.0 million tons. Five drilled wells opened fields and were commissioned to operation at the oil rates of 230 - 340 m3/day.