Lynx Exploration Archivist
Lynx Exploration Archivist Seismic Scanning and Vectorising (LEASSV) software is a comprehensive package for re-vectorising scanned images of seismic sections and outputting the results as industry compatible SEG-Y trace files. Using the utilities provided in the package, output files can be made ready for loading to seismic interpretation workstation or further processing.
Minimum hardware requirement is a PC with Intel compatible CPU, running Microsoft Windows 98, ME, 2000 or XP. Over 60 raster file formats are supported via Snowbound Software Inc's raster library; the recommended raster format for use with LEASSV is a binary or greyscale Group-4 compressed TIFF. A full-scale A0-sized scanner will be required to scan the seismic data.
Applications and utilities contained in the LEASSV package are accessed from the Lynx Launcher, a program manager which allows all installed Lynx programs to be accessed from the Lynx desktop icon. Installation can be from CD-ROM, or from install files downloaded from this website.
The LEASSV package contains:
SSV (Seismic Scan Vectorising) program brief specification:
The screen dump shows vectorized traces (red) overlaying the black and white raster image of the VA/Wiggle format input seismic section. In this example, the quality of the input image is only fair and further editing and processing will be necessary, using TracePrep and TraceFix programs to improve the quality of the output trace file
Vectorising Methods
Sections are
calibrated by triangulated affine transformations, to accomodate distortion in the original
section. Timing lines are detected on the raster image and the trace data reconstructed by
interpolation. SSV has five vectorising algorithms for dealing with most types of seismic display,
over a range of display quality.
TracePrep is a seismic trace processing program, with an intuitive user interface and a flexible range of post-stack processes. Processes can be applied in any order and the results are instantly visible through a real-time viewer. Processes are installed as packages. In the LEASSV package, TracePrep is supplied with TPBasic, TPView and TPUtils modules, containing processes for scaling, filtering and preparing vectorised seismic data for workstation loading. TracePrep is expandable - we can provide additional modules for migration and deconvolution as an optional extra if required.
Processes supplied for TracePrep in the standard LEASSV package are listed below
The image above shows TracePrep's main window. On the left are available processes. On the right, the actual processing sequence shows is for a RESPACE process, which spatially resamples the input traces. A VIEWER process has been included to display the results.
TraceFix enables seismic trace files to be edited and viewed on a trace by trace basis. Operations include:
Picked horizon data are stored in the trace auxiliary file, for use by TracePrep. For example, the water bottom can be picked for muting in TraceFix and then used as a time datum for a time variant filter applied in TracePrep.
TraceDmp enables header and trace information from seismic files, in SEG-Y or Lynx format, to be "dumped" as an on screen display. Features include:
First, select the required fields to dump, the range of traces etc. Dumps can be exported and re-imported as column or comma delimted text files, enabling all text header and trace header fields to be modified, by editing in a spreadsheet (click the Microsoft Excel icon).
A trace auxiliary file provides a place for supplementary information which cannot be put in a SEG-Y or Lynx format trace file. Each trace file has a corresponding TAX file containing mute horizons, shotpoint-trace relationships, velocities, horizon picks etc. TaxEdit provides a way to create, edit, import and export this auxiliary information, for use in TracePrep and other processing programs. Trace related information can be located by trace or CDP number, shotpoint or distance along the profile. Vertical units can be depth, or time, in seconds, milliseconds or samples.
The raster viewer utility enables raster files to be previewed and printed prior to vectorising in SSV.
For more information see Lynx Viewers - RasView.
SeisView will display SEG-Y or Lynx trace files at any scale, in various standard display modes. It provides a quick way of checking the quality of seismic trace files at any stage in the vectorising or processing.
Features include:
For more information see Lynx Viewers - SeisView
The following setup files comprise the LEASSV package, which can be downloaded from here.
To run the software, a licence is required from Lynx, in the form of a licence file or hardware key.
Please contact us for more information on purchasing the software, or for more information on our seismic vectorising service.
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