This paper presents the lessons learnt from a seismic reprocessing performed to improve the seismic reservoir characterization of a Middle East carbonate reservoir. The reservoir characterization objective is to optimize the porosity modeling driven by seismic data; hence, improving seismic amplitudes was crucial as they drive the inversion process for elastic properties. The new seismic reprocessing sequence was focused on the restoration of genuine primary amplitudes and improvement of the angle stacks design at the reservoir. In order to monitor the seismic amplitudes quality improvement throughout the processing sequence, a thorough quality assessment strategy has been implemented for decision making. It has allowed adjusting the amount of testing depending on the quality of intermediate results at selected key steps. The results obtained by using this QC strategy showed the importance to monitor in details the amplitudes quality progress by tuning at an early time the processing parameters that impact all the remaining steps. At the end of the reprocessing, a cleaner dataset, less affected by multiples interferences, with a more consistent amplitude balance and optimized angle stacks design has been obtained. It is deemed to be more appropriate for pre-stack inversion purposes in view of seismic reservoir characterization.
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