An improved dual sensor summation method with application to four-component (4-C) seafloor seismic data from the Niger Delta

  •  Difference Ogagarue    
  •  Joseph Ebeniro    


Conventional towed streamer seismic acquisition has proven highlyeffective over the years for 3D subsurface imaging. However, in areas wherewater depths are too shallow or where there are too many obstacles for streameroperations, seabed seismic sensors have, in some cases, been employed as analternative to image the subsurface. Apart from seabed seismic acquisitionbeing extremely expensive compared to surface streamer, seabed seismic data areseverely affected by receiver ghosts generated by water column reverberation.We present an improved method of summing the pressure (hydrophone data) and verticalgeophone (geophone data) data to reduce the deleterious effects of ghosts andwater column reverberations in a seabed seismic data acquired at water depthsranging from 21.1m to 40.0m in the Niger Delta. The method is based on the separationof up and down-going wavefields from the geophone and hydrophone data, andprovides an efficient noise rejection and amplitude preservation in the summeddata.

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