Abstract: The existence of offshore swell affects the quality of high-resolution marine seismic data collection seriously, while the existing swell static correction methods, neither those based on the characteristics of the data itself nor those using external information constraints, have their certain conditions of application. In view of this prevalent phenomenon, a much more universal swell static correction technique was proposed in this paper. After a simple introduction of basic principle and implementation steps, the swell effect of synthetic data of horizontal layered model was calculated subsequently, and swell suppression was carried out utilizing the surveyed data ultimately, meanwhile the reliability and effectiveness of the proposed method was quantitatively verified. The results show that whether the seafloor is simply gently-undulated or complicatedly rugged, the phenomena of high frequency jitter and energy dispersion in the reflection event caused by the swell effect can be suppressed effectively based on the method we proposed, which make the original confusing and fuzzy reflector much more clear, smooth and continuous and greatly improves the resolution and signal-to-noise ratio of the seismic sections, providing convenience for the subsequent stratigraphic division and seismic section interpretation.

Key words: swell static correction, variational mode decomposition (VMD), Pearson correlation coefficient, signal to noise ratio (SNR), single channel seismic