Abstract: Aiming at different targets during developing period, Zhongyuan Oilfield has acquired 3D seismic data of small-scale for 10 disperse batches in Baiyinchagan depression since 1993, itwas unfavorable for local research and depression exploration, stamp patterned data was not content with depression exploration development. In order to meet the requirement of exploration in the sag, Geophysical Research Institute of Zhongyuan Oilfield Company adopts the 3D data merged processing technique using 9 batches, which eliminates field data difference and lays solid foundation for exploration breakthrough

Key words: Baiyinchagan sag, merged processing, wavelet matching, surface-consistent