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

Claim 7:
8. A non-transitory computer readable medium storing instructions executable by a computer processor, the instructions comprising functionality for:
receiving an observed seismic dataset for a subterranean region of interest comprising a plurality of observed seismic traces;
receiving a seismic velocity model for the subterranean region of interest;
generating a simulated seismic dataset comprising a plurality of simulated seismic traces based, at least in part, on the seismic velocity model and a geometry of the observed seismic dataset;
determining a transformed observed seismic dataset comprising:
forming a first regularized estimate of a first instantaneous frequency of at least one member of the plurality of observed seismic traces,
wherein the first regularized estimate is based, at least in part, on a first smoothing matrix, and

determining the first instantaneous frequency based, at least in part, on the first regularized estimate;

determining a transformed simulated seismic dataset comprising:
determining a second instantaneous frequency of at least one member of the plurality of simulated seismic traces;

forming an objective function based, at least in part, on the transformed observed seismic dataset and the transformed simulated seismic dataset; and
determining, using the computer processor, an updated seismic velocity model based, at least in part, upon finding an extremum of the objective function.