![]() ![]() This can be accomplished by harmonic extrapolation. On the other hand, under appropriate circumstances, layer frequency responses can be extrapolated to frequencies outside the band of the original data using spectral periodicities determined from within the original seismic bandwidth. Frequency invention outputs may serve as useful attributes, but they should not be used for quantitative work and do not improve actual resolution. ![]() Furthermore, synthetic wedge models indicate that the invented high-frequency seismic traces do not improve thin-layer resolution. Tests in extending the bandwidth of low-frequency synthetics using these methods indicate that the invented frequencies do not tie high-frequency synthetics generated from the same reflectivity series. Frequency invention techniques, including phase acceleration and loop reconvolution, produce spectrally broadened seismic sections but arbitrarily create high frequencies without a physical basis. Various postprocessing methods can be applied to seismic data to extend the spectral bandwidth and potentially increase the seismic resolution.
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