Abstract: The oil and gas reservoir types are very various in Hongthe faults of northwestern part of Zhungaer basin,including heavy oil,light oil and dry gas. The heavy oil is distributed at the handing wall, light oil and gas reservoir at the footwall. Reservoirs rang from Carbonniferous to Cretaceous. Oil and gas is sourced from Fengcheng formation and Wuerhe formation of Changji sag based on oil light hydrocarbon and natural gas carbon istope , oil and gas distribution character at different stage and the character of the secondary change are studied. Reservoir formation model is estalished, and favourable exploration area is also determined.

Key words: oil and gas source, reservoir formation, exploration direction, Hongche area, Zhungaer basin.