Wuerxun depression is the main oil exploration objective in Hailar basin. Based on the sequence stratigraphy, this

paper deals in detail with the seismic facies in Wunan area, where the distribution of drill holes is concentrated and the

characteristics of seismic reflection are clear. In combination with the characteristics of seismic reflection events of

configuration on the time section，the authors made an integrated interpretation of the interval structure，continuity，

oscillation amplitude and other seismic facies for the seismic data from Wunan area of Wuerxun depression. Seven kinds of main

seismic types with indicative significance are summed up. According to the characteristics of the seismic facies and in

combination with structural background and drilling information，this paper describes the distribution of depositional system and

points out that the sharp sandstone surface seems to be the favorable reservoir.