Reading/Opening large seismic data

Theory

Open seismic traces module is useful when the input data is too big to load and requires lots of physical memory (RAM). It is fast and efficient compared to Read seismic traces module when dealing with large seismic data volumes. It doesn't generate any vista items. This module also doesn't generate trace headers however to get the trace headers information as a reference/connection to any module, the user should look for the option "Use trace vector on disk". This allows the data to get the "input traces on disk data handle".

Input data

Input data must be provided in the Parameters tab as Seismic file name.

Parameters

Seismic file name

choose the g-Platform internal file name from the drop down menu.

Seismic data parameters

in case the user wants to change the seismic data parameters, check this box to make the necessary changes.

Change data length

it allows the user to change the current data record length to a new record length.

Change data length - true

By default, FALSE. If TRUE (Checked), provide the new record length in the following parameters.

New data length

 specify the new record length.

New samples count

displays the total number of samples with respect to the new record length. User doesn't have any control.

Gather domain { TIME, DEPTH, FREQUENCY }

it automatically updates this parameter depending on the input seismic data file.

Settings

Skip

By default, FALSE(Unchecked). This option helps to bypass the module from the workflow.

Output data

Output DataItem

Output SEG-Y data handle

outputs Output SEG-Y data handle for connections/references to the next subsequent modules.

Output traces data handle

generates Output traces data handle as connections/references to the next modules.

Information

Trace vector size

displays the total number of traces of the input seismic file

Sample interval

displays the sample interval of the input seismic file

Data length

displays the record length of the input seismic file

Examples

In this example workflow, we try to connect the Input traces on disk data handle since this module doesn't generate any trace headers information. In order to connect/reference Input traces on disk data handle, the must check the option ""

In order to connect/reference to the Output trace headers, the user must check the option "Use trace vector on disk" in the input data tab. This will activate the "Input traces on disk data handle".

Now the user can connect/reference the Input traces on disk data handle to Output traces data handle.

In this case, the user don't have to connect/reference to the Input SEG-Y handle to Output SEG-Y handle as shown previously. Only  Output traces data handle will be sufficient.

Actions

There are no action items available for this module

Video lesson

YouTube video lesson, click here to open [VIDEO IN PROCESS...]

Related articles

Yilmaz. O., 1987, Seismic data processing: Society of Exploration Geophysicist

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