Akekule Formation of Triassic developed delta front subaqueous distributary channels in Tahe area.The channel sand matched with the low amplitude structure and formed low amplitude structural lithologic complex traps.However,due to the rapid change of the lateral migration of the channel,thin sand,strong heterogeneity,and other factors,the reservoir prediction accuracy needs higher requirements,which restricts the development effectiveness.In view of such a situation,the authors used the high precision 3D data and,on the basis of forward modeling and reflection analysis,extracted multiple attributes under the constraint of sequence frame. In combination with stratigraphic slice method,the authors clearly determined seismic reflection characteristics in this area,described the river boundary form,divided the river stage and predicted the thickness of river channel.The results show that the application of multiple attributes analysis and stratigraphic slice can accurately identify the boundary of river channel,and divide the period of river channel to improve the accuracy of reservoir prediction.