Patent ID: 11880009
Assignee: CGG SERVICES SAS
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. A seismic data processing apparatus for monitoring evolution of targeted natural resources inside an underground formation, the seismic data processing apparatus comprising:
an interface for obtaining a baseline dataset and a monitor dataset acquired during seismic surveys performed at different times over the underground formation;
a data processing unit connected to the interface and configured:
to generate a synthetic baseline dataset and a synthetic monitor dataset corresponding to the baseline dataset and the monitor dataset using a baseline model and a monitor model, respectively;
to calculate a joint inversion time-lag cost function with target regularization term including at least one of a total variation, TV, norm and a model difference norm;
to update the baseline model and the monitor model jointly such that to minimize the joint inversion time-lag cost function; and
to generate an image of the underground formation to identify changes of location and/or volume of the targeted natural resources within the underground formation, between the different times when the baseline dataset and the monitor dataset were acquired, based on the updated baseline model and the updated monitor model.