OAO Arktikgaz (Russian: Арктикгаз; formerly known as Severneftegaz; not to be confused with Sevmorneftegaz and Severneftegazprom) is a Russian oil and gas company, which operates in the Yamalo-Nenets region. It was created on the basis of the former assets of Yukos. It is a joint venture of Gazprom Neft and Novatek.