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A Velocity Tomography Inversion Method of Elastic Vector Wavefield
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 74th EAGE Conference and Exhibition incorporating EUROPEC 2012, Jun 2012, cp-293-00024
- ISBN: 978-90-73834-27-9
Abstract
We have derived velocity tomography equation and transformation between traveltime residual and depth deviation under the framework of elastic vector wavefield, proposed a traveltime tomography method which updates velocity of P and S wave based on ADCIGs (angle domain common imaging gathers) by elastic Gaussian beam migration. This method can combine the advantages of the traveltime tomography and ADCIGs to improve the inversion precision and calculation efficiency. Example from the synthetic dataset shows this method is feasible and valid, but its precision is restrained by the resolution of ADCIGs, and prestack data with low S/N may make impact on inversion results.