A study of perfectly matched layers for joint multi-component reverse-time migration
Du Qi-Zhen1, Sun Rui-Yan1, Qin Tong2, Zhu Yi-Tong1, and Bi Li-Fei3
1. School of Earth Resource and Information, China University of Petroleum, Dongying 257061, China.
2. CNOOC Ltd-TianJin Bohai Oilfield E&P Research Institute, Tianjin 300452, China.
3. Geophysical Research Institute of Shengli Oilfield Branch Co., Dongying 257022, China.
Abstract：
Reverse-time migration in finite space requires effective boundary processing technology to eliminate the artificial truncation boundary effect in the migration result. On the basis of the elastic velocity-stress equations in vertical transversely isotropic media and the idea of the conventional split perfectly matched layer (PML), the PML wave equations in reverse-time migration are derived in this paper and then the high order staggered grid discrete schemes are subsequently given. Aiming at the “reflections” from the boundary to the computational domain, as well as the effect of seismic event’s abrupt changes at the two ends of the seismic array, the PML arrangement in reverse-time migration is given. The synthetic and real elastic, prestack, multi-component, reverse-time depth migration results demonstrate that this method has much better absorbing effects than other methods and the joint migration produces good imaging results.
DU Qi-Zhen,SUN Rui-Yan,QIN Tong et al. A study of perfectly matched layers for joint multi-component reverse-time migration[J]. APPLIED GEOPHYSICS, 2010, 7(2): 166-173.
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2010, Vol. 7 
