Abstract This paper discusses Born/Rytov approximation tomographic velocity inversion methods constrained by the Fresnel zone. Calculations of the sensitivity kernel function and traveltime residuals are critical in tomographic velocity inversion. Based on the Born/Rytov approximation of the frequency-domain wave equation, we derive the traveltime sensitivity kernels of the wave equation on the band-limited wave field and simultaneously obtain the traveltime residuals based on the Rytov approximation. In contrast to single-ray tomography, the modified velocity inversion method improves the inversion stability. Tests of the near-surface velocity model and field data prove that the proposed method has higher accuracy and Computational efficiency than ray theory tomography and full waveform inversion methods.
This research is sponsored by the National Natural Science Foundation of China (No. 41204086), the Self-governed Innovative Project of China University of Petroleum (No.13CX02041A), the Doctoral Fund of National Ministry of Education (No. 20110133120001), the National 863 Project (2011AA060301), and the Major National Science and Technology Program (No. 2011ZX05006-002).
About author: Zhang Kai, PhD, graduated from Tongji University in 2008 majoring in geophysics. Currently, he is a teacher at the College of Geoscience in the China University of Petroleum focusing on seismic wave imaging and velocity inversion.
Cite this article:
ZHANG Kai,YIN Zheng,LI Zhen-Chun et al. Wave equation tomographic velocity inversion method based on the Born/Rytov approximation[J]. APPLIED GEOPHYSICS, 2013, 10(3): 314-322.
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