Research and application of pre-stack spectral bluing method based on VMD
The resolution of pre-stack seismic data will affect the accuracy of pre-stack inversion and the results of AVO a-nalysis,so it is particularly important to improve the resolution of the pre-stack track set.The spectral bluing high-resolution method combines well-logging information to make the seismic data close to the actual situation.However,in the calculation process,the average amplitude spectrum of each channel superposition is used to calculate the spectrum bluing operator,which leads to some spectral information not involved in the calculation.Therefore,this paper proposes a spectral bluing method based on VMD(variational mode decomposition method).The seismic data is decomposed into multiple IMFs(intrinsic mode components)through VMD.The spectral bluing operator is calculated to improve the resolution of each IMF,and the high-resolution seismic data results are obtained through reconstruction.The proposed method has been applied to the processing of synthetic track sets and actual seismic track set data.The results show that the spectral bluing method based on VMD can fur-ther improve the spectral information and the resolution of the pre-stack track set,and it is consistent with the forward track set of actual logging data.
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