The key issue analysis for high-precision seismic reflection imaging of sandstone-type uranium deposit
High-precision seismic reflection imaging data is essential for the fine exploration of thin-layer sand bodies and fault structures in sandstone-type uranium mineralization environments in sedimentary basin.Compared to deep oil and gas resources,sandstone-type uranium deposits are generally buried at shallower depths,have small elastic differences,and are significantly affected by the near-surface geological environment.This leads to key issues in seismic data processing,such as prominent static correction problems,severe linear noise,and dramatic stretch distortion in normal move-out corrections,all of which reduce the quality of reflection wave imaging.To address the above issues and improve the effectiveness of seismic reflection wave exploration for sandstone-type uranium deposits,based on modelled and field data,this study presents a comparative analysis of the critical issues affecting high-precision seismic imaging.It is found that adopting advanced techniques such as tomography static correction based on eikonal equation,linear noise suppression based on high-resolution Radon transform,and seismic reflection imaging based on seismic interferometry can significantly enhance the signal-to-noise ratio and resolution of shallow subsurface seismic reflection imaging.This,in turn,supplies a reliable data foundation for the fine seismic inversion with pre-stack or pro-stack data and is helpful to fulfill the fine exploration for the sandstone-type uranium mineralization environments.
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