Abstract：Using ordinary near-surface survey and static corrections can't thoroughly solve the issue of "middle to long wavelength static corrections" because of large variation of thickness and velocity of piedmont near-surface fluvial fans.The concrete shows are that the spread length of shallow refraction is too short to trace the top interface of high-velocity bed when the thickness of low velocity layer is large, inadequate interpretation algorithm of shallow refraction data and insufficient depth of uphole survey.Through systematically analyzing multiple well-crossed lines in Yanmuxi area (the contents include acquisition methods, processing techniques, velocity-field-building methods and mapping methods),we studied near-surface structures starting from acquisition,processing and interpretation, adopted the techniques such as shallow refraction with longer spread and uphole survey as well as tomographic image etc.and used first breaks to form a set of complete near-surface static corrections technique.The above mentioned techniques have been used in Yanmuxi and Shengbei areas successively and good results have been achieved
