Improved oil recovery on mature fields relies on a reservoir model accurate enough to identify by-passed oil and to monitor fluid responses to production. Integration of seismic 3D volumes with stochastic realisations and flow simulations in a single interpretation environment (Shared Earth Model) allows asset teams to perform rapid seamless iterations leading to a perfected representation of the reservoir (Fig. 1). Facies, fault and fluid mapping from 3D/4D/4C seismic data has moved one large step ahead with the advent of grid-based and 3D volume seismic classification (Fig. 2). Resulting deterministic spatial probability estimates of reservoir parameters are direct inputs to the reservoir model to constrain large uncertainties present in geostatistical distribution of reservoir parameters.

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