A-4 AVO INVERSION OF 4-D SEISMIC FOR RESERVOIR MONITORING — AN EXAMPLE ON THE OSEBERG FIELD Abstract 1 Developments are underway to incorporate a seismic contribution in the production history matching and thus provide an additional constraint for reservoir monitoring. In this paper we present our on-going investigations on how time-lapse AVO inversion can be used to estimate the changes in elastic properties and their covariances for use as a new seismic input to production history-matching. Working with data from the Oseberg field we have processed four repeat seismic surveys matching the repeat data and preserving the relative pre-stack amplitudes.


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