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A Robust and Accurate Traveltime Calculation from
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- Authors
- Issue Date
- 2004-03
- Citation
- Geosystem Engineering, 7, p. 12-20
- Abstract
- We improve the accuracy and stability of
traveltime calculation method using frequency-domain
modeling algorithm. We perform a parameter analysis to
obtain the optimum combination of frequency and damping
factor and thus improve the accuracy of traveltime.
Then we obtain the empirical formula for our numerical
algorithm. Lastly, we propose the adaptive frequency and
the adaptive damping factor for an inhomogeneous model
to eliminate the distortion in the traveltime contour. Twodimensional
numerical examples verify that the proposed
algorithm gives a much smaller traveltime error and a
better traveltime contour for the complex model. Compared
to the other two methods, this algorithm computes
traveltime that is close to a directly transmitted wave. We
demonstrated our algorithm on 2D IFP Marmousi models,
and the numerical results show that our algorithm is a
faster traveltime calculation method of a directly transmitted
wave for imaging the subsurface and transmission
tomography.
- ISSN
- 1226-9328
- Language
- English
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