Surgutneftegas (Russian: ОАО «Сургутнефтегаз», IPA: [sʊrɡʊtnʲɪftʲɪˈɡas]) is a Russian oil and gas company created by merging several previously state-owned companies owning large oil and gas reserves in Western Siberia. The company's headquarters are located in Surgut, Khanty-Mansi Autonomous Okrug.