OPTIMAL STACKING FOR MULTI-AZIMUTH PRE-STACK SEISMIC DATA

摘要

Offshore exploration for hydrocarbons in increasingly challenging environments often requires more advanced acquisition methods than conventional 3D narrow-azimuth towed streamer to better image the sub-surface for AVO analysis and reservoir characterisation. Multi-Azimuth (MAZ), Wide-Azimuth (WAZ) or Full-Azimuth (FAZ) seismic acquisition overcomes the limitations of the conventional acquisition in better illuminating the sub-surface, suppressing the multiple, and enhancing signal to noise (S/N) ratio. Nevertheless, to realise the added value of multi-azimuth data, the data need to be combined in a way that will overcome the issues such as time-shift and amplitude difference due to varied illumination between the surveys.