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P068 Case Study – 4D Processing – OBC versus Streamer – Example of OFON filed Block OML102 Nigeria T. Castex* (Total SA) P. Charrier (CGG) M.N. Dufrene (Total SA) & C. Orji (EPNL) SUMMARY This case study describes the time-lapse or 4D processing between 3D OBC data (2004) and 3D streamer data (1992) acquired on the OFON field Block OML102 offshore Nigeria. From the interpretation point of view the aim of this project was to define the limits of the RIII reservoir. The two seismic acquisitions were very different in terms of data quality (azimuths Signal to Noise ratio fold