US 11,867,856 B2
Method and system for reflection-based travel time inversion using segment dynamic image warping
Lu Liu, Beijing (CN); Yubing Li, Beijing (CN); and Weiguang He, Beijing (CN)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Jun. 3, 2021, as Appl. No. 17/338,080.
Prior Publication US 2022/0390632 A1, Dec. 8, 2022
Int. Cl. G01V 1/28 (2006.01); G01V 1/30 (2006.01)
CPC G01V 1/282 (2013.01) [G01V 1/303 (2013.01); G01V 2210/51 (2013.01); G01V 2210/614 (2013.01); G01V 2210/675 (2013.01)] 15 Claims
OG exemplary drawing
 
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.