Abstract：Prestack depth migration of plane wave is high effective depth migration technique and precious decomposition of plane wave is precondition of precious imaging of plane wave. Hyperbolic velocity filtering approach can effectively eliminate the alias and noise produced by τ-p transform of CMP gather. The paper presented an approach using fast hyperbolic velocity filtering technique to improve the decomposition of plane wave and quality of migration: firstly, Mitchell fast hyperbolic filtering is carried out for CMP gather after τ-p transform; then,the offset plane wave is fitted into plane wave in shot domain; finally, the Fourier finite-differ-ence depth migration is carried out for fitted plane wave, raising the precision of migration of plane wave by improving the quality of plane wave. Practical data processing showed the velocity filtering can effectively filter the noise produced by dip stack, significantly increase reflection energy and make events more continuous, the fault position more identified on the migrated imaging section.
陈秀梅, 王华忠, 马在田. 利用速度滤波改善平面波分解与偏移[J]. 石油地球物理勘探, 2007, 42(5): 560-563.
Chen Xiu-mei, Wang Hua-zhong, Ma Zai-tian. Using velocity filtering to improve decomposition of plane wave and migration. OGP, 2007, 42(5): 560-563.
