Patent ID: 11867856
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 14:
15. A non-transitory computer readable medium storing instructions executable by a computer processor, the instructions comprising functionality for:
obtaining seismic data acquired in a time-domain for a subterranean region of interest;
obtaining a property model for the subterranean region of interest;
determining based on the seismic data and the property model, a time shift between predicted data and the acquired seismic data using a multi-dimension algorithm to:
apply windowed polynomial fitting for signal preconditioning using predicted data and the acquired seismic data as inputs,
align the preconditioned signals of interest based on point-wise segment-to-segment matching for each segment, and
include a threshold for the time shift in each dimension;

determining an adjoint source operator using the time shift and one-way wave equation;
updating the property model using a gradient solver in a data-domain reflection traveltime inversion;
outputting the updated property model for the subterranean region of interest; and
generating a seismic image for the subterranean region of interest using the updated property model.