/MutingScripts

First-arrival picking scripts for marine streamer seismic data

Primary LanguageRubyMIT LicenseMIT

Muting scripts

Efficient manual muting scripts.

  1. Setup
    1. Make directories (run 0_mkdir.sh)
    2. Split fldr-sorted input su file (One shot gather in each su file, use 0_susplit.sh) Make sure splitted su files have "tracf" keyword and sorted by it.
    3. (Optional) Sort by offset for 3D shot gathers (run sort_offset.sh in ./Shot)
  2. Mute (skip shots, run 1_mute.rb)
  3. Interpolate skipped polygons (run 2_interp.rb)
  4. Apply muting to skipped shots using the interpolated polygons (run 3_apply.rb)
  5. (Optional) Sort back to original order for 3D shot gathers
  6. Merge muted shot gathers (./Muteshot/muteshot.*)

Mute

Gpl Mute : Mute shotgathers
Usage :
	1_mute.rb first=[] last=[] [optional parameters]
Required parameters :
	first	: shot number of the first shotgather
	last	: shot number of the last shotgather
Optional parameters
	step=1		: shot step [do first,last,step]
	perc=85		: suximage percent
	hbox=1000	: suximage hbox
	wbox=1270	: suximage wbox
	x1end		: suximage x1end
	d2=1		: suximage d2
	ldigit=4	: length of fldr digits [3|4|5|6]

Interpolate

Use the same first, last, and step used in Mute step.

Gpl Mute Interpolator : read polygon files and interpolate skipped polygons
Usage :
	2_interp.rb first=[] last=[] [optional parameters]
Required parameters :
	first	: shot number of the first shotgather
	last	: shot number of the last shotgather
Optional parameter :
	step=last-first	: shot step
	ldigit=4	: length of fldr digits [3|4|5|6]

Apply

Use the same first and last used in Mute step. (step= increments of the fldr numbers)

Gpl Apply Mute : Apply muting using polygons
Usage :
	3_apply.rb first=[] last=[] [optional parameters]
Required parameters :
	first	: shot number of the first shotgather
	last	: shot number of the last shotgather
Optional parameters
	step=1		: shot step [do first,last,step]
	ldigit=4	: length of fldr digits [3|4|5|6]

Reference

Kim, A., D. Ryu, W. Ha, C. Shin, 2015, An efficient first arrival picking procedure for marine streamer data, Geosystem Engineering, 18(5), 251-258.