SEG Y

The first rule of the SEG-Y format is that no-one follows the SEG-Y format. It's a bad rule.

The full table from Revision 1

This table only shows the most important items. Rows labelled strongly recommended are notes as such in the SEG Y standard specification. Those fields marked recommended are worth using as defined here, based on my experience. Matt 13:59, 3 January 2013 (UTC)

Reveal the full table:

Byte stream
Showing SEG-Y rev 1 Extended Textual File Header records.



Reading SEG Y files
Most proprietary seismic interpretation software has a way to read SEG Y data into the application. The only open source application we know of is OpendTect.

There are several Python libraries for reading SEG Y files:
 * PyGeo, by Brendan Smithyman at UBC
 * SegyPY, by Thomas Mejer Hansen
 * segy-py, by Kurt Schwehr
 * ObsPy, by Moritz Beyreuther and others

If you want the SEG Y data in some other format, e.g. an image, then I have used segy2ascii with good results.