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US 7,065,004 B2Granted
Horizon-based residual depth migration velocity analysis
AssigneePGS Americas, Inc.
InventorsJunru Jiao, Ruben D. Martinez
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Abstract
A method is disclosed for processing seismic data. The method includes prestack depth migrating the seismic data to generate common image gathers using an initial velocity-depth model. Horizons in the migrated seismic data are selected. Residual migration velocity analysis in the depth-offset domain is performed with respect to each selected horizon, and the velocity-depth model is updated based on the residual migration velocity analysis.
Claims6
A method for processing seismic data, comprising:
- prestack depth migrating the seismic data to generate common image gathers using an initial velocity-depth model;
- selecting at least one horizon in the migrated seismic data;
- performing residual migration velocity analysis in the depth-offset domain at the at least one selected horizon, the residual migration velocity analysis including calculating depth residual with respect to offset;
- and
- updating the velocity-depth model based on the residual migration velocity analysis.
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Dependencies are inferred from the claim text.