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Technical Abstract

4D pre-stack time migration: application to thermal EOR monitoring

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In 4D seismic, the velocity model used for imaging and reservoir characterization can change over calendar time as the reservoir is produced. This is particularly true for heavy-oil reservoir produced by steam simulation (EOR). We propose an automatic 4D update of the 3D velocity model using an efficient technique based on 4D pre-stack time migration (4D-PSTM) that describes the pre-stack differential kinematic effects by matching the 4D dataset. On real continuous 4D seismic data, the 4D-PSTM allows us to quantify interval velocity variations that can be used to map temperature changes in the reservoir in agreement with petro-elastic model expectations.
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Publications

EAGE - European Association of Geoscientists and Engineers

Authors

Julien Cotton, Herve Chauris, Eric Forgues, Laurene Michou

Month

June

Copyright

© 2015 EAGE