SEG-Y Loader Overview

The SEG-Y format is not flexible or efficient enough to read large amounts of data quickly. The SEG-Y Loader converts SEG-Y data into DUG’s Dugio format. The Dugio format is optimised to provide the necessary speed and flexibility for Insight’s high performance displays.

Surveys vs. Volumes

A survey refers to the navigational positioning of a dataset. It defines the basic parameters (i.e. inline and crossline spacing) of where the volume sits on the earth. A volume contains the actual seismic data, positioned according to the survey it is associated with.

See Survey vs Volumes and Survey Overview for an introduction to surveys.

A survey file can be created during the SEG-Y loading process.

How to load SEG-Y data

The SEG-Y Loader is a step-by-step wizard that leads you through importing SEG-Y formatted data into Insight.


  1. Open the SEG-Y Loader (see Launching SEG-Y Loader).
  2. Select the data type (2D or 3D), vertical domain (time or depth) and type of gather (if applicable)
  3. Select the SEG-Y files to load
  4. Set trace length and other settings to read the SEG-Y correctly. Some fields are required:
  5. Optionally, export the configuration to reuse later.
  6. Apply filters to the data to select a subset, or exclude invalid traces (see Filtering 2D Data or Filtering 3D Data).
  7. Check the configuration using analysis. Adjust settings as required.
  8. Optionally, load separate navigation to position the data (see Loading Navigation Data Files)
  9. Create or use an existing survey to position the data (see Defining a 2D Survey or Defining a 3D Survey).
  10. Choose a file name and other export options, including the creation of high-speed optimised volumes. (see Output and Writing Options (2D SEG-Y) or Output and Writing Options (3D SEG-Y)).
  11. Run the conversion to output the Dugio volume and add it to the project. (see Writing 2D Data or Writing 3D Data)
  12. In Insight, load the volume into a session.

For more information on SEG-Y Loading, see Why am I having issues loading SEG-Y?.

Genuine offer of assistance

DUG understands that importing SEG-Y data can be a confusing task.

Whether you are using a trial version or a fully-paid licence, we will help you to import your data to Insight so that you will get the maximum out of your data.

For more details, contact support at [email protected].