Abstract: The eastern slope of Jimusar Sag of Junggar Basin which shows good exploration prospect is a very important
strategic area that can make Xinjiang oilfield enforce litho stratigraphic hydrocarbon reservoir exploration and increase oil-gas
reserve and production. The sedimentary facies，reservoir and injection of the Wutonggou Formation are studied by using
drilling，logging，testing and seismic data. The major facies are braided river delta which subaqueous distributary channels
of the front and braided channels of the plain are the most favourable high-quality reservoir sand bodies and lacustrine. The
reservoir can be divided into four types，and litho stratigraphic trapsWutougou Formation are mainly type III，which are neat
the source of good physical property and thick cap look，and are of better reliability. The key to better litho stratigraphic
hydrocarbon reservoir exploration is application of reservoir prediction technologies base on sequence stratigraphy，which can
make the sand bodies prediction and identification of subaqueous distributary channels onlap of the front and braided channels
of the plain more available.

Key words: Jimusar Sag, eastern slope, Wutonggou Formation, litho stratigraphic hydrocarbon reservoir, reservoir prediction