Abstract: The Carboniferous-Permian volcanic rocks in eastern and western Junggar have evolved into the practical hydrocarbon exploration displacement series of strata. Practice shows that the reservoir formation of the Carboniferous-Permian volcanic rocks is mostly based on the "source control theory", as well as the reservoir formation and distribution is controlled by regional structural evolution, i.e., the control of the development of Carboniferous hydrocarbon generating sags and the distribution of source rocks. The Carboniferous volcanic rocks in western Junggar belong to systematic marine and continental intermediate-basic volcanic rock assemblages and are characterized by the convergence of island-arc transitional crust volcanic rocks. The Carboniferous volcanic rocks in eastern Junggar belong to basic and intermediate-acid rock assemblages and are characterized by early island-arc compression and late intraplate extension. Permian volcanic rocks are formed by intraplate extension after collision stage. The Carboniferous hydrocarbon generating sags and source rocks are mainly formed in the anterior and posterior margin of the Kelameili island-arc belt in eastern Junggar. The Permian hydrocarbon generating sags and source rocks are mainly formed in the back-arc extensional basin in the fault zone in northwestern margin and the Santanghu area in eastern margin. The target and domains of exploration for oil and gas in Carboniferous-Permian volcanic rocks are around the development zones of inherited structures, i.e., the fault zone in northwestern margin of western Junggar (the Karamay-Baikouquan fault zone and the Hongshanzui-Chepaizi fault zone), the Kelameili orogenic zone in eastern Junggar (the Kupu-Santanghu Basin, the Beisantai bulge-Jimusaer sag, the Dajing-Shiqiantan area), the Ludong-Wucaiwan area and Mobei bulge in northern Junggar.

Key words: volcanic rock, structural setting, exploration directions, favorable belts, Carboniferous-Permian, eastern and western Junggar