Patent ID: 11906679
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method for generating a geophysical image of a subsurface region, the method comprising:
generating seismic energy using one or more seismic sources;
receiving the seismic energy using a plurality of receivers;
storing the received seismic energy as a plurality of seismic traces;
generating the geophysical image from the plurality of seismic traces;
defining a computational sub-volume for the geophysical image, wherein the computational sub-volume includes a predetermined number of seismic traces of a plurality of seismic traces and a predetermined number of samples per each one of the plurality of seismic traces;
generating a data matrix corresponding to a first sub-volume of the subsurface region based on the defined computational sub-volume, the data matrix comprising the predetermined number of samples for the predetermined number of traces of a portion of a seismic dataset corresponding to the first sub-volume;
estimating a coherence between the predetermined number of traces of the data matrix by performing a sum of a variance of the predetermined number of samples;
assigning the estimated coherence to a location in the geophysical image corresponding to the first sub-volume; and
generating a plurality of additional data matrices corresponding to a plurality of additional sub-volumes of the subsurface region, estimating coherences for the traces of each of the plurality of additional sub-volumes, and assigning the estimated coherences to locations in the geophysical image corresponding to the plurality of additional sub-volumes.