De Ruyter field is located in the southern North Sea on the Dutch Continental Shelf. The discovery well was drilled in 1996 on a seismic anomaly and the well found gas with an oil rim in sandstones of Triassic age. An appraisal well drilled in 1997 on an adjacent compartment found oil without a gas cap in Permian sandstones. Subsequent exploration drilling in the area proved unsuccessful. Recently however, seismic amplitude interpretation has identified a number of prospects with a high chance of containing hydrocarbons. Two of these prospects were drilled during 2007 and both wells discovered gas. The current approach to exploration in the area is focused on validation of seismic anomalies and is aimed at de-risking drillable prospects. This paper demonstrates how validation is based on a rock physics model and observations on seismic amplitudes and flat events.


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