Reprocessing of 2D seismic reflection data over the western margin of the Kaapvaal Craton in South Africa and preparation for diffraction imaging using deep machine learning

  • Datum: –15.00
  • Plats: Geocentrum Dk235
  • Föreläsare: Michael Westgate, University of the Witwatersrand (South Africa)
  • Kontaktperson: Dr Alba Gil de la Iglesia
  • Seminarium
 


In the 1980s, AngloGold Corp. South Africa conducted a series of 2D reflection seismic surveys in search of gold-bearing horizons. These lines were reappraised for structural analysis by Tinker et al (2002). One of the lines located on the western margin of the Kaapvaal Craton contains notable diffraction anomalies in regions of poor structural constrains within the data. This line is reprocessed with two objectives. The first objective is to use modern reflection processing techniques to maximise reflector imaging potential of the survey parameters. The second objective is to prepare the data for use of modern diffraction imaging algorithms based on deep machine learning and pattern recognition. This allows for high-resolution imaging in regions where diffractions are dominant, as in the studied seismic line, due to sharp edges in the geological structure of the subsurface. The reprocessing of the line is presented here along with challenges, advancements and future aims.