Abstract：The regional structural position of Zhenbe block belongs to fault-fold zone of Dabashan platform edge, the northeast of Sichuan basin, which is basin-to-mountain-coupled complex zone that is characteristics of complex geomorphy, peaks rising falling heavily, criss-cross gully, and higher mountains and deep valleys that relative elevation difference can reach several thousand km and above, which is complex geomorphic condition seldom seen in mountainous seismic exploration at home and abroad. The structural types mainly are fault-related folds, imbricate structure and fault delta zone. The available2.D seismic data were characterized by lower S/N ratio and poorer structural imaging. According to the various factors affecting the acquired quality of seismic data, we conducted the analysis in detail and thought how to improve the seismic acquisition quality and gained preliminary knowledge. We considered on the basis of full geologic investigation, surface structure survey and interference waves investigation, it should carry out test and experiments about small group interval, higher folds, ultra-multiple receiver, larger spread, geometry-changed survey by separate blocks, lines and segments and other field surveying methods in view of geologic feature of surface layers in work area and by the aid of optimal geometry designing technique as well as study of wide-angle seismic acquisition, processing and application. At the same time, it should develop field investigation and theoretical study about mountainous near-surface attenuation by absorption; the study of wavefield feature of seismic wave propagation should also be carried out by the aid of seismic wave forward simulation and geologic study, which summarizes the regularity and accumulates the experiences, providing guide for next field production.
