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Time-lapse Seismic Reservoir Characterization Used for Reservoir Model Update of a Mature Chalk Field - The South Arne Ca
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 76th EAGE Conference and Exhibition 2014, Jun 2014, Volume 2014, p.1 - 5
Abstract
Summary
The use of time-lapse seismic data has changed reservoir management of the South Arne field, where an increasing volume of marginal reserves are being targeted. This paper describes the use of the time-lapse seismic data in a physical context, where estimated time-lapse time-shifts are used for reservoir compaction estimation and its impact on the reservoir modelling. The time-lapse amplitude changes are inverted for change in acoustic impedance and vp/vs ratio. A reservoir state dependent rock physics model enables an estimation of saturation changes, which contains detailed information about the water sweep; information which is not present in neither seismic NRMS maps nor in the initial reservoir model.
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