This module performs source/receiver number correction (renumbering) for 3D seismic data. It calculates new source/receiver number and writes it into trace header.There are two input data geometry trace headers (“Read seismic traces/Read SEG-Y traces”) and grid (“Binning3D”) required. The grid used for calculation inline, crossline number. Then this numbers used for creation source and receiver numbers. Also module has possibility to fill-up elevation headers from input binning data.
Before Correction
•In 3D seismic acquisition, both sources and receivers are placed on a grid (inline × crossline).
•The black dots represent receiver stations forming receiver lines.
•The blue star (SP) represents a source location that is misplaced — i.e., not exactly on the designed grid intersection.
This can happen due to:
•GPS drift
•Terrain restrictions
•Human or recording errors
•Navigation inaccuracies
As a result, the shot grid is irregular, and binning (assigning traces to grid cells) becomes inaccurate.
After Correction
•After applying shot point correction:
oThe sources (SPs) are repositioned to their correct nominal grid intersections.
oThe grid now forms a clean, uniform 3D matrix of shot and receiver positions.
oEach intersection corresponds to one valid shot-receiver combination.
•The corrected shot points are labeled (e.g., SP1, SP5, SP6, SP7, SP8) to show the new organized pattern.
This ensures that:
•All source–receiver pairs are in the right geometric relation.
•The fold map (number of traces per bin) is accurate.
•The 3D cube built from the geometry is spatially correct.
Trace headers input- connect/reference to Output trace headers either from Read seismic traces or Read SEG-Y traces module
GBinGridItem - IN- connect/reference to Output bin grid in case connecting/referencing to Binning 3D. Alternatively connect/reference to loaded item if the user loaded the previously saved bin grid information by using Load item module. This bin grid information is utilized in generating the source/receiver SP/lines etc.
Generate SP (Source) { Composite source, Source line / SP, none }- this option allows the user to generate the Source Shot Point (SP) number. Choose the respective options from the drop down menu. By default, Composite Source.
Composite Source - generates Composite source by the combination of inline & crossline numbers i.e. Source number = Inline number + Crossline number
Source line - generates Source line by considering the crossline number i.e., Source line = Crossline number
Source SP -generates Source SP by considering the inline number i.e., Source SP = Inline number
None - there is no source generation or correction.
Generate RP (Receiver) { Composite receiver, Receiver line / RP, none }- this option allows the user to generate the Receiver Shot Point (RP) number. Choose the respective options from the drop down menu. By default, Composite Receiver.
Composite Receiver - generates Composite receiver by the combination of crossline & inline numbers i.e. Receiver number = Crossline number + Inline number
Receiver line - generates Receiver line by considering the inline number i.e., Receiver line = Inline number
Receiver SP - generates Receiver SP by considering the crossline number i.e., Receiver SP = Crossline number
None - there is no source generation or correction.
Recalculate source elevation- recalculates source elevation by input topo binning data. By default, FALSE (Unchecked).
Recalculate receiver elevation- recalculates receiver elevation by input topo binning data. By default, FALSE (Unchecked).
Recalculate bin elevation- recalculates bin elevation by input topo binning data (Binning 3D module creates smooth topography so the final elevations will be smooth). By default, FALSE (Unchecked).
Skip- By default, FALSE(Unchecked). This option helps to bypass the module from the workflow.
Trace headers output- generates updated output trace headers
There is no information available for this module so the user can ignore it.
In this example workflow, we connect/reference Trace headers input to Output trace headers, GBinGridItem to Output bin grid.
There are no action items available for this module.
YouTube video lesson, click here to open [VIDEO IN PROCESS...]
Yilmaz. O., 1987, Seismic data processing: Society of Exploration Geophysicist
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