* Gazprom Neft’s total reserves include allocations proportional to the company’s interests in affiliated companies (including Slavneft, Tomskneft, Salym Petroleum Development, SeverEnergia, Messoyakhaneftegaz and Northgas, as well as assets in Iraq and Venezuela), but exclude the company’s reserves arising from its interests in NIS, Serbia.
** Developed by the Society of Petroleum Engineers (SPE), the SPE’s Petroleum Resources Management System (SPE-PRMS) is the most widely used reserves classification system in the world, reflecting not only the likely detection of oil and gas reserves, but also the economic viability of their recovery, with reserves classified according to three categories: 3P — proved, probable, and possible.
*** The reserves classification system developed by U.S. Securities and Exchange Commission.