Abstract: In light of characteristics of complex surface condition and developed interference wave in Biyang sag, integrated with existed problems of low s/n ratio of medium-deep reflection and big migrated regression error at boundary faulting, this paper presents some ma-terial measurements in prestack noise rejection, static correction, amplitude processing, inverse convolution and migration imaging, in-cluding some profitable attempts. All these improve medium-deep reflecting energy and migrated imaging accuracy, hence allow whole seismic data processing quality to be increased. In addition, it is suggested that improving the quality of seismic data processing is a sys-tematic project,which need variety of methods to be guidually integrated with so that reaches higher level on the whole.

Key words: Biyang sag, seismic data, migration, pre-stack analysis, signal/noise ratio