Patent ID: 11971513
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Measurement (Instruments)
Classification: CPC G  E | IPC E  G

Claim 5:
6. The method of claim 1, wherein determining the seismic velocity increment comprises:
simulating propagation of a seismic wave forward in time for each of a plurality of source locations;
determining an adjoint source for each of the plurality of time-windowed trace pairs;
simulating, for each of the plurality of time-windowed trace pairs, propagation of a seismic wave generated by the adjoint source backward in time;
determining a plurality of seismic velocity gradient increments using an imaging condition based, at least in part, on the forward propagated seismic wave and the backward propagated seismic wave;
obtaining a seismic velocity gradient by combining the plurality of seismic velocity gradient increments; and
determining the seismic velocity increment by scaling the seismic velocity gradient based, at least in part, on the extremum of the objective function.