Abstract Wavefield separation of multicomponent seismic data to image subsurface structures can be realized in either the space domain or the wavenumber domain. However, as the particle velocity components used in the wavenumber-domain wavefield separation are not defined at the same grid point with the staggered-grid finite-difference method for elastic wavefield simulation, we propose the wavenumber-domain interpolation method to estimate the required values at the common grid points prior to the wavenumber-domain true-amplitude wavefield separation. Moreover, numerical experiments show that the wavenumber-domain interpolation method has high interpolation accuracy and the true-amplitude wavefield separation method shows good amplitude preservation. The application of the proposed methodology to elastic reverse-time migration can obtain good amplitude-preserved images even in the case of some velocity error.
This work is supported by the National Science Foundation of China (No. 41174100), the Large-scale Oil and Gas Field and Coalbed Methane Development Major Projects (No. 2011ZX05019-008-08), and the China National Petroleum Corporation (No. 2014A-3609).
Cite this article:
DU Qi-Zhen,ZHANG Ming-Qiang,CHEN Xiao-Ran et al. True-amplitude wavefield separation using staggered-grid interpolation in the wavenumber domain[J]. APPLIED GEOPHYSICS, 2014, 11(4): 437-446.
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2014, Vol. 11 
