Abstract: The technology of seismic waveform classification technique is very mature,but it is not perfect in the oilfield development.The reservoir of fluvial facies that changes very quickly on the side has a severe heterogeneity,so it is a critical problem to descript the reservoir heterogeneity between wells.Through the combination of logging and 3D seismic data,using the seismic waveform classification techniques,by the bridge of electrofacies,the seismic waveform characteristics can be turn into the reservoir overlay feature that improves the description of the reservoir distribution heterogeneity.Studies have shown that:the fluvial reservoirs has the typical four electrofacies types corresponding to four kinds of seismic response characteristics,that represents the fluvial reservoir overlaying mode.The application of seismic waveform classification techniques supplies the support of well locations adjusting of and potential reserves searching in the development oil field.