|Date||Tuesday, 4 December 2018|
|Time||16:30 - 18:00 hr|
KNGMG kring Noord december lezing heeft als onderwerp:
Broadband seismic data have much improved characteristics of the seismic wavelet. The advantages are: more stable and faster interpretation, better imaging & interpretation in poor-data areas, resolving thick layers (& their properties), higher vertical resolution (less tuning), and less weather-downtime ($$) during acquisition.
The benefit of an increased bandwidth to the high end of the spectrum (up to 100 Hz) is restricted to shallow levels (about 1 sec below seafloor). The main advantage is the increased bandwidth to the low end, where it has to be noted that adding the 4 to 8 Hz, and 2 to 4 Hz, each time adds one octave to the spectrum – which is very significant. The increased awareness of the value of low frequencies for the appearance and interpretability of seismic data, also triggered investigation of the spectral content of existing (conventional) data. They often appeared to have a far from optimal spectrum, and new workflows for ‘broadband’ (re-)processing of conventional data were developed, with special focus on spectral shaping methods.
In this presentation I will elaborate on the above and show many examples.