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Petroleum geology and reserve appraisal of N field in Sakhaline Island

The purpose of this paper is to evaluate the oil and gas reserves in the N field located on Sakhaline Island in the Russian Federation. Field geology and field development history are described after the field discovery in 1957. The reserves have been estimated in accordance with definitions consistent with those established on 20 March 2009 by the Petroleum Resource Management System. The total estimated proved, probable and possible net oil, condensate and gas reserves, as of 20 March 2009, attributable to the Russian Federation are expressed in English and metric units. The proved developed and probable-plus- possible oil reserves are 19.6 × 103 metric tons (103 mt) and 152.4 × 103 metric tons (103 mt), respectively. The probable-plus-possible gas reserves are 352 million cubic meters (106 m3) expressed at the temperature base of 20°C and the pressure base of the atmosphere. The estimated future net revenues from the proved developed oil and from the probable-plus-possible oil and gas are 2095 and 25,082 thousand US dollars (103 US$), respectively. The present worth attributable to the proved and probable-plus-possible reserves in the N field, as of 20 March 2009, is 1486 and 15,596 thousand US dollars (103 US$), respectively, at the discount factor of 10%.