P065 Assessing the Value of Seismic Re-Processing and Uncertainty of Seismic Processing R. Hardy* (Trinity College Dublin) SUMMARY Quantifying the value of seismic processing and reprocessing is a difficult task but one which is increasingly being demanded by managers and interpreters. We have few tools available to assess data uncertainty and the benefits and pitfalls of applying new technologies. In this paper we stress the value of seismic modelling to achieve these goals. We use several case histories to illustrate the use of seismic models which are developed on a case by case basis to address particular issues within a