Essential technologies of vibroseis for ultra-deep fault-controlled fracture-cavity reservoirs in the desert area of Tarim Basin

The purpose of this study is to address the challenges and limitations related to vibroseis in ultra-deep exploration in the desert region of Tarim Basin. The research analyzes the root causes of abnormal noise in vibroseis surface wave in desert areas and assesses the influence of near-surface factors on the quality of seismic data through forward modeling. In terms of data acquisition, the implementation of nonlinear sweeping signals is employed to improve the energy of low frequency signals. The implementation of a multi-level and multi-domain noise suppression technique effectively enhances the role of the near offset signal in seismic processing for migration. This approach has been successfully applied to the Shunbei Oil Field, resulting in a notable enhancement of the vibroseis' ability to characterize ultra-deep fault-controlled fracture-cavity reservoirs in desert regions. As a result, it highlights the potential of vibroseis as a viable alternative to explosive sources.