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

Technical Standards Committee 2012 Chair – Rune Hagelund (rune.hagelund@daeco.no) Vice-chair – Stewart A. Levin (<stew@sep.stanford.edu)

Important web addresses Technical standards http://www.seg.org/ts Technical Standards Committee online collaboration site http://www.seg.org/tsc

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

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 2012 + clarifications and ”bug fixes” Draft available at www.seg.org/tsc Documents area Published to SEG Technical Standards site www.seg.org/ts Release letter included

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 http://www.seg.org/web/technical-standards-committee/wiki/-/wiki/Main/SegMeasurements

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 4.2.2 – 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 2012 + some minor fixes. Appendix F – Create new appendix with snapshot of Energistics Unit of Measure integer codes.

P1/11, P2/11 and P6/## Tom Owen (towen@midpointgeo.com)

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

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

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

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

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

EM sub-committee Headed by Friedrich Roth (froth@emgs.com)

Seismic field storage medium recommendations Group headed by Nils Aatland (n.s.aatland@fugro.no)

Storage Format recommendations Headed by Jill Lewis (jill@troika-int.com)

AOB?

AOB?

Thank you for attending!