Abstract:Seismic time profile can be used to describe geological target precisely. However, due to irregular geological body, insignificant difference of wave impedance between geological boundaries and high and steep dip angle of fault structure in metamorphic rock and intrusive rock area, seismic original data has the characteristics of complex wave field, development of interference wave and low signal-to-noise ratio. In order to obtain the deep reflection seismic profile in Yishu fault belt which objectively reflects the actual geological conditions, through detailed analysis of the characteristics of the original seismic data in the study area, aiming at different characteristics of various interference waves, targeted suppression measures are taken to carry out combined denoising, so as to suppress the interference and protect the effective signal to the maximum extent. This seismic data processing aims at high fidelity and high signal-to-noise ratio, and continuously optimizes the processing flow and processing parameters by processing while interpreting. In the process of processing, static correction, prestack denoising, velocity field establishment and wave field spatial homing are studied in detail, and high quality seismic stack and migration time section has beem obtained. The reflection section reveals the fine structure of the lithosphere along Yishu fault belt and its two sides for the first time. It will provide reliable seismological basis for studying the deep structures and its impact on resources and environment in Yishu fault belt .
