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- W2172236589 abstract "The computation of interval velocities is an old and persistent problem in seismic analysis, and it is critically important to an efficient seismic imaging. The conventional method, Dix equation, is an analytical expression which permits to easily compute interval velocities from stacking velocities under certain assumptions. When stacking velocity function does not behave properly, Dix equation results in abrupt variations on interval velocity function, making the profile unrealistic. Another issue refers to model building: an accurate interval velocity field forms an estimate to a stratigraphic velocity model (suitable for seismic migration), and a possible insertion of interfaces in interval velocities would help on this estimation. This paper aims to solve this problem using an approach different from Dix's, in order to get better results. To achieve this, some inversion algorithms which take smoothness and/or simplicity of interval velocities in account will be used, making them more realistic. Inverted models containing interfaces will be obtained as well, using reflexion location information through semblance panels. A discussion of the results, comparing conventional and applied methods, will be done along this study. Stacking velocities and semblance values from synthetic and real data will be used, obtained during the seismic processing step called velocity analysis." @default.
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- W2172236589 date "2013-01-09" @default.
- W2172236589 modified "2023-09-24" @default.
- W2172236589 title "Non-linear inversion of interval velocities" @default.
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- W2172236589 doi "https://doi.org/10.1190/sbgf2013-255" @default.
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