Constraining Geological Models Using 4D Seismic at Ekofisk Field

A-04 CONSTRAINING GEOLOGICAL MODELS USING 4D SEISMIC AT EKOFISK FIELD Summary 1 Three geological models have been built at Ekofisk field using a well log compactiondecompaction process to describe porosity changes with time due to chalk compaction. In order to constrain these geomodels using 4D seismic information a 1D modeling workflow has been built to efficiently study the seismic responses to reservoir parameter changes and in particular the compaction of the porous chalk. Different compaction models were considered based on laboratory derived equations and output from the flow simulation. A rock physics model for porous chalk was used to relate