However, in late 1990s Gazprom lost control over Sibneftegaz and the main shareholder became Itera.
The second largest shareholder became the Russian fertilizer producer Acron Group.
The field was ready for production in 2003; however, commercial production started only in 2007 after change in its ownership structure as Gazprom did not allowed produced gas to enter into the gas transportation system.
[3][4][5][6] In 2006, Gazprom through its banking arm Gazprombank bought back controlling stake (51%) in Sibneftegaz from Itera and commercial production started after that.
[9][10] It has reserves of 324.211 billion cubic metres (11.4494 trillion cubic feet) of natural gas, 0.991 million tonnes of gas condensate, and 9.035 million tonnes of crude oil.