One of the main goals in seismic imaging is to obtain maximum resolution, which requires maximum bandwidth with high frequency content. Among the processes that cause a decrease in high frequency content is NMO correction. In this paper, we introduce a new method to enhance frequency content on low frequency traces using high frequency traces. The method is applied, as a special case, to compensate for high frequency loss due to NMO stretch. Synthetic data examples are presented.
The fundamental problem of enhancing seismic frequency can be simplified to one basic idea: improving the bandwidth on the frequency spectrum of a seismic trace while preserving its phase spectrum. To do that, we compare the low frequency trace with a high frequency trace to extract an enhancement factor that we apply on the low frequency trace in a way that the phase spectrum is unchanged. To be able to achieve this separation, we apply the process in the frequency domain.