D008 Monitoring Reservoir Compaction by Joint Inversion of Seafloor Subsidence and Time–Lapse Seismic Timeshift Data S.J. Bourne* (Shell International Exploration & Production BV) & P.J. Hatchell (Shell International Exploration & Production BV) SUMMARY Areal monitoring of reservoir compaction is possible using geophysical measurements such as time-lapse seismic or surface subsidence. Changes in seismic travel time induced by vertical strain within the overburden provide a measure of reservoir compaction. However uncertainty in the geomechanical model linking overburden strain and reservoir compaction limits our knowledge of reservoir compaction. Likewise surface subsidence induced by top reservoir subsidence provides a second independent measure of


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