Abstract:To take the non-stationarity (time- and space- varying property) of phase attribute in prestack gathers into account, we propose a new prestack phase correction method based on local similarity in the framework of least-squares inversion with shaping regularization. The proposed method calculates firstly local similarity between the phase-rotated trace and the optimal reference trace, then estimates the phase difference between each trace and the reference trace with this local similarity. Finally the aligned prestack gathers are obtained after phase correction. Experimental results of synthetic and real data show that our proposed method can correct the phase inconsistency between traces in prestack gathers and realize coherent stack so as to improve the stack quality. local similarity between the phase-rotated trace and the optimal reference trace, then estimates the phase difference between each trace and the reference trace with this local similarity. Finally the aligned prestack gathers are obtained after phase correction. Experimental results of synthetic and real data show that our proposed method can correct the phase inconsistency between traces in prestack gathers and realize coherent stack so as to improve the stack quality.
刘玉金, 李振春, 周卿. 基于局部相似度的叠前非稳态相位校正方法[J]. 石油地球物理勘探, 2014, 49(3): 468-474.
Liu Yujin, Li Zhenchun, Zhouqin. Pre-stack non-stationarity phase correction based on local similarity. OGP, 2014, 49(3): 468-474.