Combined migration velocity model-building and its application in tunnel seismic prediction

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Abstract We propose a combined migration velocity analysis and imaging method based on Kirchhoff integral migration and reverse time migration, using the residual curvature analysis and layer stripping strategy to build the velocity model. This method improves the image resolution of Kirchhoff integral migration and reduces the computations of the reverse time migration. It combines the advantages of efficiency and accuracy of the two migration methods. Its application in tunnel seismic prediction shows good results. Numerical experiments show that the imaging results of reverse time migration are better than the imaging results of Kirchhoff integral migration in many aspects of tunnel prediction. Field data show that this method has efficient computations and can establish a reasonable velocity model and a high quality imaging section. Combination with geological information can make an accurate prediction of the front of the tunnel geological structure.

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	GONG Xiang-Bo
	HAN Li-Guo
	NIU Jian-Jun
	ZHANG Xiao-Pei
	WANG De-Li
	DU Li-Zhi

Key words： Tunnel prediction migration velocity analysis Kirchhoff integral migration reverse time migration velocity model-building

Received: 2010-01-06;

Fund:

This work is sponsored by Nation 973 Program (Grant No. 2007CB209603), Nation 863 projection (Grant No. 2006AA06Z108), Nation 863 Program (Grant No. 2007AA06Z215), Young Teachers Innovation Fund of Jilin University (No. 421032124424) and Graduate Innovation Fund of Jilin University (Grant No. 20101059).

Cite this article:

GONG Xiang-Bo,HAN Li-Guo,NIU Jian-Jun et al. Combined migration velocity model-building and its application in tunnel seismic prediction[J]. APPLIED GEOPHYSICS, 2010, 7(3): 265-271.

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