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Realization and analysis of an integration tomography scheme

Weitian Chen

chen@sep.stanford.edu

ABSTRACT

I realize and analyze a model-based joint tomography scheme in this paper. Surface reflection seismic data and VSP traveltimes are used simultaneously to invert the velocity by using an integrated inversion scheme. Since more data are used, the integrated tomography can obtain more accurate inversion results with lower uncertainty. Using identity operator as integration operator, I apply this method to a synthetic anticline model. Compared to the surface reflection tomography, the integrated inversion result is better in areas where the VSP ray coverage is good and conversely, the integrated inversion result is poorer in the areas where VSP ray coverage is sparse or inexistent. The results suggest we can obtain improved velocity field by this integration tomography scheme if using a well-designed integration operator.



 
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Stanford Exploration Project
7/8/2003