High-accuracy velocity analysis for multiple AVO seismic data

The velocity analysis plays an important role in seismic data processing. Although the existing methods have improved noise resistance and accuracy, they are not well applied to data containing multiple amplitude-variations-with-offset (AVO). To solve the problem, we propose a high-accuracy velocity analysis method with polarity correlation in this paper. Firstly, we use singular values of seismic data to construct the weighting function method, which reduced the influence of noise and improved the accuracy of the velocity spectra. Then, a polarity-related information is proposed with multiple AVO and used in the weighting function. Synthetic and field data results show that the proposed method has higher accuracy with strong noise and multiple AVO.