Petroleum geological characteristics and exploration orientation of large oilfields in Junggar Basin

In comparison with the eastern continental basins in China,Junggar Basin has the special characteristics in petroleum geology.Its trait of basin evolution and space-time distribution of hydrocarbon source rock,tectonic development characteristics and oil-gas migration-accumulation modes decide the fact that the main type of the large oilfields is the stratigraphic oil-gas reservoir and that of the anticline oil-gas reservoir is secondary,which determines the development and space-time distribution of the large oilfields.This basin has abundant oil and gas resource with lower exploration degree and the fast increasing reserves.It is also in the discovery stage of the large and outsize oilfields.