Abstract
The time-lapse seismic method is a technique that uses repeated seismic surveys to monitor the dynamic change of reservoir parameters. Nowadays, it has been widely used in the dynamic monitoring of marine oil and gas reservoirs. It could also be used for monitoring the CO2 injection at CO2 geological storage sites. It can give us a clear image of the injected CO2 in the reservoir. Seismic waveform inversion is a relatively new method for time-lapse monitoring. In this paper, we test the double difference full waveform inversion method on a synthetic 4D seismic data set. The preliminary results show that it is possible to use 4D full waveform inversion method to monitor the velocity changes caused by CO2 injection.
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