8/18/2019 bishop processing

1/5

Crucial noises and problems acquired from the observer logs are identified in the

earlier stage of processing.

From obs log: wind noise at far offsets.

Channel 66-72, high frequenc noise diminishes reverberation and possible

reflection lines.

8/18/2019 bishop processing

2/5

From obs log: dead geophones at channel 6!-72.

"urel noises that does not pic# up first arrivals.

8/18/2019 bishop processing

3/5

$%&' power lines distorting the surve or possible dead geophones as several

channels are recording a frequenc of $%&'.

8/18/2019 bishop processing

4/5

From obs log: (rain and &elicopter 

&igh amplitude arrivals before first brea#s.

)ome of the traces are do not carr reliable information and contains merel noise

for e*ample dead geophones. +oing through each FFs, several traces are #illed.

(hese fault traces normall move bac#wards in channel with FF. (he traces that

dont bring information such as reflection or direct arrivals are best viewed in variable

densit.

)ome of the traces are missing in coloured densit in FF //%!

8/18/2019 bishop processing

5/5

0*ample of selected traces to #illed 1mar#ed in red for FF //%!

(op mute is applied to remove the noises that appear before the first arrival.