Diffraction wave separating method based on shortcut edging sparse Radon transformation

Abstract

The invention provides a diffraction wave separating method based on shortcut edging sparse Radon transformation. Waves are separation from fields in a pre-stack gather with diffraction waves by utilizing high-efficiency sparse Radon transformation, and separated reflection waves and diffraction waves are obtained. Sparse Radon transformation obtains high-resolution model solution and can greatly improve the calculation efficiency; and at the same time, shortcut edging technology can effectively reduce the shortcut edging effect of Radon transformation, thereby improving the separating degree of the reflection waves and the diffraction waves in the Radon domain, and effectively carrying out wave and field separation on the reflection waves and the diffraction waves.

Description

technical field [0001] The invention relates to the technical field of seismic signal processing in seismic exploration, in particular to a diffraction wave separation method based on short-track flanged sparse Radon transform. Background technique [0002] In seismic exploration, due to the complexity of the underground structure, as well as the limitations of the acquisition conditions and the acquisition environment, in addition to the effective reflection waves, there will be many other types of seismic waves in the actually collected seismic data, such as ground roll, multiple waves, diffracted waves, etc. On the one hand, since conventional seismic data processing is based on reflected waves, the existence of these seismic waves will have a great impact on the identification of effective reflected waves and subsequent processing; Therefore, it can be used as a supplement to effective reflected waves. For example, diffracted waves in seismic records often reflect the i...

AI Technical Summary

Problems solved by technology

Resolution and efficiency are two main factors limiting the application of Radon transform, which will greatly affect the effect of diffraction wave separation based on Radon transform

At the same time, in the Radon transform, the edge effect of the short path will greatly reduce the resolution of the Radon transform, so that the reflected wave and the diffracted wave will produce an aliasing area in the Radon domain, thereby reducing the separation effect of the short path diffracted wave (Trad, D ., T. Ulrych, and M. Sacchi, 2003, Latest views of the sparse Radon transform: Geophysics, 68, 386–399)

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