Automated salt body extraction from seismic data using the level set method
J. Haukås, O. Roaldsdotter Ravndal, B.H. Fotland, A. Bounaim and L. Sonneland
Journal name: First Break
Issue: Vol 31, No 4, April 2013 pp. 35 - 42
Info: Article, PDF ( 1.03Mb )
A solution for automated salt body extraction from seismic data has been developed. The solution is based on a level set algorithm, used in combination with seismic attributes that discriminate between salt and sediments and highlight top and base salt reflections and terminations of sediments against salt. In an automated process, steps to obtain the gross volume of salt are combined with local adjustments to place the salt boundary at the appropriate attribute extrema. The process also includes a local stop criterion based on a salt boundary confidence measure. The ability to separate completed salt boundary parts from uncertain regions where the salt boundary has not been identified enables the interpreter to focus on the parts where manual interpretation is required. User constraints, including manual interpretations, are honoured by the algorithm. The methodology is demonstrated on a multi-client seismic data set from the Gulf of Mexico.