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Discussion

While the methodologies described in this paper are valid for general linear operators, they have several fundamental limitations. Most importantly, they require an accurate forward modeling operator: both the physics of wave propagation and the true earth velocity must be accurately modeled. While the physics of wave-propagation is broadly understood, earth velocity models are never completely true-to-life.

Another important caveat is that the ``wave-equation methods'' outlined here require the data and models to be represented on a regular grid. While we can choose our model-space, prestack seismic data is never recorded on a perfectly regular grid. Before we can apply any wave-equation technique (such as those described here), we need to regularize the data. Chemingui (1999) and Fomel (2000) provide two different approaches to solving this problem.


next up previous print clean
Next: Conclusion Up: Rickett: Normalized migration Previous: Numerical comparisons
Stanford Exploration Project
4/29/2001