期刊
COMPUTERS & GEOSCIENCES
卷 86, 期 -, 页码 46-54出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cageo.2015.10.001
关键词
Simultaneous sources; Structural-oriented median filter; Plane-wave destruction; Velocity slope transformation
资金
- National Natural Science Foundation of China [41274137]
- National Science and Technology of Major Projects of China [2011ZX05019-006]
- National Engineering Laboratory of Offshore Oil Exploration
Simultaneous-source shooting can help tremendously shorten the acquisition period and improve the quality of seismic data for better subsalt seismic imaging, but at the expense of introducing strong interference (blending noise) to the acquired seismic data. We propose to use a structural-oriented median filter to attenuate the blending noise along the structural direction of seismic profiles. The principle of the proposed approach is to first flatten the seismic record in local spatial windows and then to apply a traditional median filter (MF) to the third flattened dimension. The key component of the proposed approach is the estimation of the local slope, which can be calculated by first scanning the NMO velocity and then transferring the velocity to the local slope. Both synthetic and field data examples show that the proposed approach can successfully separate the simultaneous-source data into individual sources. We provide an open-source toy example to better demonstratethe proposed methodology. (C) 2015 Elsevier Ltd. All rights reserved.
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