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Inversion of Traveltime Error for Anisotropy Parameters - Foothills Thrust Model
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 68th EAGE Conference and Exhibition incorporating SPE EUROPEC 2006, Jun 2006, cp-2-00326
- ISBN: 978-90-73781-00-9
Abstract
Isotropic pre-stack migration of the Foothills Synthetic Data Set results in erroneous positioning of reflections below the thrust sheet. Using CFP analysis, we invert imaging error as measured in the time/offset domain by least squares to deduce anisotropy parameters ε and δ under a number of assumptions: homogeneous, weak TI, known depth, known thickness, and known P-wave velocity (slow direction). We find for this model that ε and δ may be estimated to within ten percent of their true values. We speculate that the assumptions necessary for convergence may be relaxed when S-wave data is incorporated.