VSP data,Gabor-Daubechies tight frame,high-frequency asymptotic expansion,imaging condition,migration artifact," />
Migration scheme for imaging offset VSP data within local phase space
Abstract The imaging of offset VSP data in local phase space can improve the image of the subsurface structure near the well. In this paper, we present a migration scheme for imaging VSP data in a local phase space, which uses the Gabor-Daubechies tight frame-based extrapolator (G-D extrapolator) and its high-frequency asymptotic expansion to extrapolate wavefields and also delineates an improved correlation imaging condition in the local angle domain. The results for migrating synthetic and real VSP data demonstrate that the application of the high-frequency G-D extrapolator asymptotic expansion can effectively decrease computational complexity. The local angle domain correlation imaging condition can be used to weaken migration artifacts without increasing computation.
This work was supported by the National Hi-Tech Research and Development Program of China (Grant No. 2006AA09A102-11) and the National Natural Science Fund of China (Grant No.40730424 and 40674064).
Cite this article:
ZHOU Yan-Hui,GAO Jing-Huai,WANG Bao-Li et al. Migration scheme for imaging offset VSP data within local phase space[J]. APPLIED GEOPHYSICS, 2010, 7(1): 31-40.
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2010, Vol. 7 
