1. SEG Technical Standards Committee Meeting
EAGE Conference Copenhagen 2012
Tuesday Jun 5, 2012

2. Technical Standards Committee 2012
Chair – Rune Hagelund
Vice-chair – Stewart A. Levin

3. Important web addresses
Technical standards
Technical Standards Committee online collaboration site

4. Agenda New releases Ongoing work AOB SEG-D Rev 3.0, May 2012 update
OGP P1/11, P2/11 + P6/##
Ongoing work
SEG-Y 2.0
SPS 3.0
EM standard format sub-committee
“Seismic field storage medium recommendations” workgroup
“Storage format recommendation” workgroup
AOB

5. SEG-D Rev 3.0, May 2012 Update of the SEG-D Rev 3.0 standard
No modification of the binary format
Enable Measurement block
Agreement reached regarding the Energistics UoM (SEG 2011)
A few new producers, support leapseconds until Jun clarifications and ”bug fixes”
Draft available at Documents area
Published to SEG Technical Standards site
Release letter included

6. SEG-D Measurement Timestamp Value (4 byte IEEE float) optional
Maximum Value optional
Minimum Value optional
Quantity Class (e.g. length, time) 2 byte int code
Unit of Measure (e.g. meter, second) 2 byte int code
Measurement desc. code (e.g. Equipment 2 byte int code width, Air pressure)
Block type 0x61

7. SEG-D Rev 3.0, May 2012 Changes May 2012 version
Section 8.1 – Added comment for Base Scan Interval (byte 23) when using 1/16 msec sample rate as it is not a multiple of 1 micro second.
Section 3.1 – Added leap seconds until Jun 2012.
Section 4.1 – Updated Energistics address
Section – Fixed typo in field 5 (Record ID) 50 -> 60
Section 5.3 – Change description of timing word to support negative values.
Section 7.23 and 8.24 – Measurement block enabled
Section 8.16 – Channel Set Descriptor byte 62 – Added two new supported physical units, Pascal (1216) and Micropascal (1316)
Section 8.17 – Fix typo, max number of channel sets is 99, not 9999.
Appendix A – Added Verif-i (code 51), Troika International (code 52) and MagSeis (code 53).
Appendix C – Updated the Energistics address and the Producer Organization Code table
Appendix D.1.2 – Fix typo page 145, example e) – add missing = in first line
Appendix D.1.2 – Fix typo page 149, example j) – remove ((SEG:EndText)) as it is inconsistent with the rest of examples.
Appendix E.9 – Add support for leap seconds until Jun some minor fixes.
Appendix F – Create new appendix with snapshot of Energistics Unit of Measure integer codes.

8. P1/11, P2/11 and P6/##
Tom Owen

9. SEG-Y Rev 2.0 Draft under development (prelim version available)
Stewart Levin heading team
Will be published for comments on Documents folder soon
Aim: Support extended values in SEG-D Rev 3.0

10. SEG Technical Standards Committee
SEG Y rev 2 overview
SEG Technical Standards Committee

11. Trace Header Ext 1 (240 byte)
Changes
Trace Header (240 byte)
«SEG00000»
Allow 240 byte trace header extensions, using a text string in the last 8 bytes of each extension to identify its contents
Support up to 231 samples per trace and traces per ensemble
Permit arbitrarily large and small sample intervals (double precision option)
Added 3-byte and 8-byte sample formats
Trace Header Ext 1 (240 byte)
(optional)
«SEG00001»
User Def Hdr 1 (240 byte)
«XXXXXXX»
Data

12. Changes Support microsecond date and time stamps
Provide for additional precision in coordinates, depths, elevations (Can use lat/long and UTM directly)
Synchronize coordinate reference system specification with SEG-D rev 3
Backward compatible with rev 1 (with edit to binary header) as long as undefined fields were filled with binary zeros

13. SPS 3.0
Various meetings and discussions with P#-taskforce regarding common format
Not much progress since SEG 2011 San Antonio
Update will be done for SEG 2012 in Las Vegas

14. EM sub-committee
Headed by Friedrich Roth

15. Seismic field storage medium recommendations
Group headed by Nils Aatland

16. Storage Format recommendations
Headed by Jill Lewis

17. AOB?

18. AOB?

19. Thank you for attending!