SEG Standards

Troika Managing Director Jill Lewis is a past Chair of the Committee and led a team that prepared the specifications for SEG-Y revision 2.0. The current Chair is also from Troika. The Committee serves as a forum for the discussion of geophysical developments in which standards for acquisition and processing of geophysical data need to be identified or improved. When data problems of a sufficient magnitude to warrant action by SEG are identified, an appropriate subcommittee is appointed to develop a set of standards and make a recommendation to the Executive Committee concerning their adoption.

Learn more about SEG Technical Standards 

SEG-Y rev 2.0 March 2017

SEG-Y has been the default standard for storing and exchanging processed seismic data since it was published in 1975. A revision in 2002 extended the standard to handle 3D acquisition and high capacity media. Since then, extensive developments in data acquisition and processing capabilities such as time-lapse (4D), multicable, multicomponent and seabed data have continued to evolve, requiring a further revision of the format to ensure accurate capture of the data and associated metadata to future-proof valuable information on tape or disk.

In addition to previous capabilities, SEG-Y revision 2.0 provides for up to 65,535 additional 240-byte trace headers for metadata, more than 4 billion samples per trace, variable sample intervals and trillions of traces per line or ensemble. The revised format also supports additional data sample formats including IEEE double precision (64 bit), little-endian and pair-wise byte swapping to improve I/O performance, microsecond accuracy in time and date stamps and additional precision on coordinates, depths and elevations.

SEGY_rev2 March 2017