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

Claim 14:
15. A system for forming an image of a subterranean region of interest, comprising:
a seismic source to emit a radiated seismic wave;
a plurality of seismic receivers for detecting and recording an observed seismic dataset generated by the radiated seismic wave; and
a seismic processor configured to:
receive the observed seismic dataset for the subterranean region of interest comprising a plurality of observed seismic traces;
receive a seismic velocity model for the subterranean region of interest;
generate 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;
determine a transformed observed seismic dataset comprising:
form 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

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

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

form an objective function based, at least in part, on the transformed observed seismic dataset and on the transformed simulated seismic dataset; and
determine an updated seismic velocity model based, at least in part, upon finding an extremum of the objective function; and
form the image of the subterranean region of interest based, at least in part, on the updated seismic velocity model.