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Surface Related Multiple Elimination (SRME) The attenuation of deep water multiple energy utilizing the information contained in the seismic data itself is by far the most powerful and "AVO" friendly method currently available.
Tau-p Domain Deconvolution Tau is the intercept and p is slowness (inverse velocity) Tau-p deconvolution techniques can be used to attenuate relatively short period multiples. The time domain multiples of "1A" have increasingly poorer temporal periodicity with increasing offset (the events are converging at the far offsets so they are not periodic!). Display "1B" is the tau-p transform of "1A". In the tau-p domain the multiple energy is periodic - although the period reduces with increasing slowness. Display "1C" is produced by applying deconvolution in the tau-p domain and then applying an inverse tau-p transform to get back to the X-t domain. Display 1
FK-Domain Multiple Attenuation The FK domain multiple attenuation technique still has a place in the processor's tool box but it relies on dip discrimination. The FK transform of Display "2B" shows poor primary-multiple separation in F-k space, especially at K = 0. Note the 5Hz beat pattern generated by the 200ms period multiple event.
Multiple Attenuation using the Parabolic Transform The FOCUS routine PRADMUS allows discrimination based on curvature rather than dip. This gives better separation of the primary and multiple events as shown in panel "2C". The multiple energy can be modeled and subtracted to leave a primary only dataset 2C. Display 2
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