The most challenging Barents Sea region - Phoenix data library

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The Phoenix Project is reprocessed seismic data of publicly available library of NPD. The data is located in the Barents Sea, the most challenging area on NCS for seismic processing. The vintage 2D lines were acquired almost 40 years ago. Strong multiples and rapidly increasing velocity characterize that region. Even if data is very old, it still contains potential information. The data was reprocessed by PSS-GEO using the newest processing techniques to uplift data quality.

1.  It is known that the region is characterized by strong multiple noise. In order to solve the problem, three demultiple methods were applied: SRME, Tau-P Deconvolution and Hi-Res Radon filter. Additionally, modeling in the common offset domain and adaptive subtraction modeling of residual multiple noise has been applied to remove residual multiple noise.

2.  To improve the imaging, PSS-Geo has applied De-ghosting to remove a ghost effect and increase data bandwidth. Applying this new technique to the vintage 2D seismic lines provides a significant uplift of the data quality.

3.  Kirchhoff Pre-Stack Time Migration has been applied at the end. This potentially increases the utility of the data for AVO or inversion analysis. PSTM Migration also gives a possibility to create a better velocity field.    

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