GEDCO-Streamer Bin Fold Analysis

This tutorial shows how to create a bin fold analysis for a marine streamer survey. You will learn
how to create and display the analysis. You will also review ASCII reports and writing scripts.
Working with this Tutorial
Set parameters as described or shown in pictures of dialogs. As you work, use OMNI 3D’s
Popup Help to see explanations of all available parameters. Hover your cursor over a parameter
or click the question mark in the upper right of a dialog and then click the parameter for Popup
Help.
If you are new to OMNI 3D, please see the “Basic Streamer” tutorial before you use this tutorial.
In this intermediate tutorial it is assumed that you can:
Start OMNI 3D
Create a project
Find and use menus in the Project Tree
Use Pop-Up Help in OMNI 3D’s menus and dialogs
Lay out a model streamer survey
Go to Help | Load Tutorial Solutions and open the Streamer folder. The folder contains both
the input data for this exercise and the completed solution project. (Please see the end of this
tutorial for information about working with the solution project.)
To complete this tutorial you will need this file:
...\Tutorial\Streamer\Streamer Analysis Example-Data\Swath Streamer.ost

Create Streamer Analysis
The shooting script is an integral part of the streamer sail line definition. To create an analysis
for this survey go to the Project Tree and right-click on Analyses under the name of the survey
(Swath Streamer). Select Create New Analysis and choose Bin – Fold, offset, azimuth
statistics.
The top two analyses are available in OMNI
3D Layout. You must be licensed for OMNI
3D Workshop to use the analyses listed in the
bottom box.
We will start with a Bin - Fold, offset,
azimuth statistics analysis.
The binning method for the analyses on the
left assume a horizontal surface and flat
reflectors.
There are several methods for binning the
data. Either a horizontal or dipping reflector
may be used.

If you have more than one processor on your machine, OMNI 3D’s multi-threading can allow
you to continue to work while this calculation takes place in the background. Specify the number
of processors OMNI 3D can use for this calculation.
Use the default name or click the Change Filename button to give the analysis a new name.
Click Finish to begin the calculation.
When the calculation completes, go to File | Save to save the project.
Display Bin Analysis
The calculated analysis will display automatically. Right-click in the Edit View and select Full
View to see the entire survey.

In this example the bins are colored by the number of offsets equal to or less than 3000 meters in
length. The color scale maximum is the total fold for the survey when all offsets are counted.
Right-click in the color scale and select Set Levels From Data. This will rescale the color scale
to the maximum value based on current settings in the Bin Analysis Style.

 

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