Patent ID: 11867857
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 6:
7. The method of claim 1, wherein determining the updated seismic velocity model comprises:
determining an adjoint source for each of a plurality of seismic receiver locations based, at least in part, on the observed seismic dataset and the simulated seismic dataset;
simulating, for each of a plurality of seismic source locations and the plurality of seismic receiver locations, propagation of a seismic wave generated by the adjoint source backward in time;
simulating, for each of the plurality of seismic source locations, propagation of a seismic wave forward in time;
determining a seismic velocity gradient using an imaging condition based, at least in part, on the simulated seismic wave propagated forward in time and the simulated seismic wave propagated backward in time;
determining a seismic velocity increment model by scaling the seismic velocity gradient based, at least in part, on the extremum of the objective function; and
updating the seismic velocity model based, at least in part, on the seismic velocity increment model.