Seismic Digitisation

GEPlan Consulting has developed a proprietary technique to digitise scanned seismic sections to digital formats (SEGY). This accurate human-controlled process converts your old seismic lines in useful SEGY data, ready to be imported in your seismic interpretation software.

The SEGY file contains the lines and the spatial references, so the digitalisation consists of four main steps:

  1. Graphic elaboration of the seismic lines (rectification of the borders, filters, resize and cut);
  2. Determination of the coordinates of the shotpoint, thanks to the georeferencing of the shotpoint maps in a ArcGIS environment;
  3. Upload of the images and the coordinates in software like Kingdom, capable of export the final SEGY that contain the images and the coordinates;
  4. Apply filters to the rough version of the resulting SEGY in order to improve the seismic quality.

seismic

Once the digitization is finalised (Final SEGY) the resulting seismic line can be filtered (in order to reduce the noise and improve the quality) and eventually migrated (thus to place the reflectors in their real location).

The figure below shows an example of a seismic line before and after the conversion technique (from pdf to SEGY). The resulting SEGY is a rough processing that needs still to be filtered and improved.

seismic

The filters allow to properly reconstruct the wavelet shape.

seismic

Afterwards the high amplitude 0 Hz noise and random noise are removed in order to improve the seismic quality.

seismic

The migration process can be also performed in order to place the reflectors in their real location.

migration