Benefits of 3D4C Surveys in the Caspian Sea

A26 BENEFITS OF 3D4C SURVEYS IN THE CASPIAN SEA Abstract 1 The first 3D ocean-bottom seismic (OBS) surveys in the Caspian Sea provide a new look at a complex geological region in terms of both P-wave and C-wave imaging. Novel acquisition design and a processing campaign spanning two years result in wide-azimuth P-wave images far superior to conventional narrow-azimuth towed streamer data. Wide-azimuth C-wave data provide a more reliable structural picture in places where distributed gas strongly affects the P-wave image. Wherever possible the processing has been designed to take advantage of the ocean-bottom setting and the acquisition design. Further