Extracts free line (user selected arbitrary line) from the 3D seismic data
The module performs free-line selection from input 3D seismic dataset. Free-line described by input crooked line. Also extract seismic data has the following requirements for selection:
1. Distance from source/receiver/CMP to the given crooked line is less or equal to the given Point Distance.
2. Offset value is between the given Min offset and Max offset
SEG-Y data handle - connect/reference to the Output SEG-Y data handle. This input data can be either a prestack/post stack data.
Sorted headers of input data - connect/reference to the Output sorted headers of the input data.
Maximum offset - Maximal offset requirement
Minimum offset - Minimal offset requirement
Point Distance - Maximal distance from the given crooked line
Extraction Type { CS, CR, CMP } - Select the extraction type from the drop down menu i.e. CS, CR, CMP.
CS - Common Shot gather
CR - Common Receiver gather
CMP - Common Mid Point gather
Output file name - Full name of output file
Import crooked line
Crooked line input file - Full name of input crooked line file
Skip import errors - If checked, errors of importing crooked line file are ignored
SegyCacheParams - parameters for setting advanced parameters of reading seismic traces from disk:
SegyReadParams - parameters for setting advanced parameters of reading seismic traces from disk:
Thread count (for SSD) - amount of treads for reading seismic traces from disk.
Bulk size (traces) - size of a chunk (data portion) for reading seismic traces from disk.
Skip - By default, FALSE(Unchecked). This option helps to bypass the module from the workflow.
There is no output data vista items from this module so the user can ignore it. Final output file name should be mentioned in the parameters tab.
There is no information available for this module.
In this example workflow, we are extracting an arbitary line from the seismic data using the following workflow
In the above workflow, we've loaded a 3D volume and sorted the data in Inline/crossline - Offset order. Later, we make the necessary connections/references to Extract 3D seismic data module.
The user should provide the parameters i.e. minimum and maximum offset that should be considered while extracting the seismic data from the 3D volume. Also, the distance from the free line/crooked line to be considered for extracting the seismic data.
Also, make sure to provide the crooked line input file. The file format should be in sequence number, x and y coordinates in space delimited format only. Also, there shouldn't be any headers in the text file. It should start directly from the values of sequence number, x and y coordinates.
There are no vista items to look for this module.
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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