1)
De-noising sea noise data
This work presents De-noising sea noise data
and also how data from a marine seismic survey, which is highly contaminated by
noise, was de-noised through the use of a time-frequency filter. In addition to
the present standard work flow designed to remove cavitation noise, strumming
noise and swell-noise. We introduce a new approach to track seismic
interference. This is done by applying time-frequency de-noising on the slowness
that gathers. As a motivation and background for the processing we also explain
some of the techniques behind the generation of the many different noise types.
The end story is that even in case low if
there is a low quality input data then also it can be turned into high quality
seismic sections. Even though the dataset used is only one, the results and its
methodologies represented here are considered to be general, and should be definitely
applicable to a large number of seismic surveys.
Questions:
a)
Name the two components which seismic data consists
of?
b)
What is the second problem in this dataset?
c)
What is the frequency range of swell noise?
d)
What is the frequency range of hydrostatic pressure
variation noise?
Sol:
a)
signal and a noise component
b)
Swell-noise
c)
(1-10(15)Hz)
d)
(0-1(2)Hz)
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