Gazprom plus one share of Sakhalin Energy. In June 2007, TNK-BP, a subsidiary of BP plc, agreed to sell its stake in Kovykta field in Siberia to Gazprom after the Government of Russia questioned BP's right to export gas from Russia. On 23 June 2007, the governments of Russia and Italy signed a memorandum of understanding towards a joint venture between Gazprom and Eni SpA to construct a 558-mile (900 km) gas pipeline to carry gas per year from Russia to Europe. This "South Stream" pipeline would extend under the Black Sea to Bulgaria with a south fork to Italy and
Gazprom Neft Messoyakhaneftegas, an equally owned joint venture with TNK-BP, holds the licenses for both blocks with Gazprom Neft as operator. The recoverable C1+C2 reserves of both blocks total 620 million tonnes of primarily heavy oil. The fields were discovered in the 1980s and are the most northern-located onshore Russian fields. The Messoyakha oil and gas fields are located on the Gydan Peninsula in the Tazovsky District of the Yamalo-Nenets Autonomous Area - an Arctic climate zone with undeveloped infrastructure. By 2020 the Messoyakha fields are expected to be producing 8 mln tonnes per year with the first million produced by 2016.