A NMO stretch correction based on an amplitude-preserved matched filtering
Luo Xin1,2, Chen Xuehua1,2, Qi Yingkai1,2, Song Lijuan3, Zhou Yuanmao1,2
1. State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, Sichuan 610059, China;
2. Key Laboratory of Earth Exploration and Information Technology, Ministry of Educatim, Chengdu University of Technology, Chengdu, Sichuan 610059, China;
3. College of Foreign Languages, Chengdu University of Technology, Chengdu, Sichuan 610059, China
Abstract：NMO correction is an important step in seismic data processing. However, conventional NMO correction leads to seismic wavelet stretch, especially for shallow far-offset seismic data in which wavelet shifts to lower frequency and amplitude gets larger. This NMO stretch damages seismic data resolution and affects AVO analysis. We propose in this paper an approach to NMO stretch correction based on an amplitude-preserved matched filtering algorithm. The proposed approach can enhance seismic event continuity, eliminate frequency shifts, and improve data resolution. Furthermore, it can preserve inherent amplitude variation in original data. This approach is suitable for any offset seismic data without knowing its wavelet.
Shi Jian,Wu Zhiqiang,Liu Jiangping et al. Normal moveout stretch correction and its processing method. Marine Geology & Quaternary Geology,2011,31(4):187-193.
Cui Baowen,Wang Weihong. Spectral borrowing stretch-free normal moveout correction. Progress in Geophysics,2007,22(3):960-964.
[8]
Zhang Bo,Zhang Kui,Guo Shiguang et al. Nonstretching NMO correction of prestack time-migrated gathers using a matching-pursuit algorithm. Geophysics,2013,78(1):U9-U17.
