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

Claim 0:
1. A computer-implemented method, comprising:
obtaining, by a computer processor, seismic data acquired in a time-domain for a subterranean region of interest;
obtaining, by the computer processor, a property model for the subterranean region of interest;
determining, by the computer processor, 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, by the computer processor, an adjoint source operator using the time shift and one-way wave equation;
updating, by the computer processor, the property model using a gradient solver in a data-domain reflection traveltime inversion;
outputting, by the computer processor, the updated property model for the subterranean region of interest; and
generating, by the computer processor, a seismic image for the subterranean region of interest using the updated property model.