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Processing & Storing SEGY Seismic Data Guide

This guide provides a comprehensive overview of processing and storing SEGY seismic data collected in field operations, including the implementation of the JPEG2000 framework for compression and archiving. It also includes examples and helpful resources for encoding, interpreting, and visualizing the data.

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Processing & Storing SEGY Seismic Data Guide

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  1. Guide to Processing and Storing SEGY Seismic Data Collected in Field Operations Bob CourtneyGeological Survey of Canada (Atlantic)Bob.courtney@nrcan.gc.ca

  2. Objectives for Field Ops • Validate and store seismic data collected during marine field ops • Scientists should walk off the vessel with seismic data in a highly usable and compressed form • Compressed data should be submitted to on-line archives on return to shore to expand holdings

  3. GSC Implementation of JPEG2000 • GSC has implemented the JPEG2000 framework to consolidate, encode, archive, interpret and disseminate digital SEGY data. • Experience suggests between 10:1 to 40:1 compression effective • Approach applied to seismic, sidescan, and sounder data. Will (?) be extended to image trace data of multibeam sounders (water column imaging), other gridded data sets. • Read more

  4. SEGY  JPEG2000Processing Framework JPEG2000 Viewers GIS Tape Encode Interpret Harvest Archive DVD Register Convert QC Internet Scan

  5. HarvestDemultiplex and Combine File 1 File 2 File n-1 Demultiplex Combine Channels Concatenate Big SEGY >200,000 pings 2 GB File n

  6. HarvestDemultiplex and Combine • Reduce number of files => 1 file/day rather than 50 • Database-linked nomenclature • Composite channel files; sidescan, 2 channel high res • Self descriptive file names • Expedition_datatype_instrument_xdcr_starttime_endtime • 2007006_SEISMIC_KNUDSON_3.5khz_132_0007_to_132_1217.sgy

  7. HarvestDemultiplex and Combine Download most recent copy at : ftp://gsca.nrcan.gc.ca/gsca/courtney/Combine_Segy/CombineSegy.zip Online Help with program and, also, at : ftp://gsca.nrcan.gc.ca/gsca/courtney/Combine_Segy/Combine SEGY Files.htm Remember to remove an older version of the program before you install the most recent version

  8. HarvestDemultiplex and Combine Examples • GSCDIG example • Knudsen Sounder • If only KEB files have been recorded then convert to SEGY using their conversion utility Click to download

  9. EncodeSEGY  SGYJP2

  10. EncodeSEGY  SGYJP2 SEGY.xsd XML to Database GZIP XML SEGY headers Summary data 1:1 10:1 Filter Signal Cond. Outliers Bipolar Envelope Half-wave SEGY SGYJP2 JPEG2000 Compression Engine 10:1 - 40:1 Waveform Data • zero padding trace delays • lossless or lossy • keep only significant bit-depth • choose reduced bit-depth scaled to highest amplitude;

  11. EncodeSEGY  SGYJP2 Download most recent copy at : ftp://gsca.nrcan.gc.ca/gsca/courtney/SegyJp2/SegyJp2.zip Online Help with program and, also, at : ftp://gsca.nrcan.gc.ca/gsca/courtney/SegyJp2/SegyJp2.htm Remember to remove an older version of the program before you install the most recent version

  12. EncodeSEGY  SGYJP2 Examples • GSCDIG example • Knudsen Sounder

  13. InterpretSGYJP2

  14. InterpretSGYJP2 horizons.xsd XML to Database XML Horizons View & Interpret SGYJP2 GZIP XML Markers SGYJP2 XML Sections Shapefiles GIS Automation

  15. InterpretSGYJP2 Download most recent copy at : ftp://gsca.nrcan.gc.ca/gsca/courtney/SegyJp2Viewer/SegyJp2_Viewer.zip Online Help with program and, also, at : ftp://gsca.nrcan.gc.ca/gsca/courtney/SegyJp2Viewer/SegyJp2 Viewer.htm Sample Data Sets at: ftp://gsca.nrcan.gc.ca/gsca/courtney/Sample%20Data/ Remember to remove an older version of the program before you install the most recent version

  16. Ongoing EffortsSGYJP2 • Shapefiles and ESRI automation • Google Earth KMZ • Drivers for Klein digital formats • GSF, XTF encoding ( XML schemas)

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