Swapping trace headers information from nominal geometry to original geometry

Theory

To change/swap the marine seismic data from pseudo or nominal geometry to real or original geometry, we use this module to get back to the original or real geometry. Psuedo or nominal geometry is used to perform some kind of tasks which is not possible in the original geometry set up. After finishing the processes, we require to swap the geometry from nominal to original geometry.

When the data is transferred from original geometry to nominal geometry it creates additional trace headers information with Prefix as NOMINAL & REAL.

Input data

Input DataItem

Input trace headers

Connect/reference to Output trace headers of Nominal marine geometry module

Input gather

Connect/reference to the Output gather

Work mode { Trace headers, Gather }

There are work modes available for the user to choose from the drop down menu. When the work mode is "Trace headers", Input gather will automatically disabled. Similarly, if the work mode is "Gather" then the Input trace headers

WorkMode - Gather

Input gather

Connec/reference to Output gather

WorkMode - Trace headers

Input trace headers

Connect/reference to Output trace headers of Nominal marine geometry module.

Parameters

Fill geometry from { Real geometry, Nominal geometry }

There are two options available for the user to choose from the drop down menu.

Real geometry - This will overwrite the nominal geometry trace headers information and restores/fills the original geometry trace headers information in the place of nominal geometry trace headers information.

Nominal geometry - when this options is chosen, it will fill all the trace headers information with the nominal geometry trace headers.

Settings

Auto-connection

By default, TRUE(Checked).It will automatically connects to the next module. To avoid auto-connect, the user should uncheck this option.

Number of threads

One less than total no of nodes/threads to execute a job in multi-thread mode.

Skip

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

Output data

Output data

Output gather

The output gather will have the updated (original) trace headers information.

Output trace headers

Output trace headers will have the updated (original) trace headers information.

Information

There is no information available for this module so the user can ignore it.

Examples

In this example workflow, we are reading the input data by using "Read seismic traces" followed by applying a pseudo geometry to the input trace headers with "Nominal marine geometry" module. Sorted the data into common receiver domain and performed Despiking in the common receiver domain.

Later we change/swap the marine geometry from nominal geometry to original geometry.

QC the trace headers by using "QC trace geometry" to make sure that the data is swapped to original geometry.

Actions

There are no action items available for this module so the user can ignore it.

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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