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| 基于同相轴优化追踪的多次波匹配衰减方法 |
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谭军1,2,3,李金山1,2,3,宋鹏1,2,3,王磊1,张晓波1,钟梦轩1
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(1.中国海洋大学海洋地球科学学院,山东青岛 266100;2.海洋国家实验室海洋矿产资源评价与探测技术功能实验室, 山东青岛266071;3.中国海洋大学海底科学与探测技术教育部重点实验室,山东青岛 266100)
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| 摘要: |
| 提出基于同相轴优化追踪的多次波匹配衰减方法,首先利用SRME预测得到的多次波记录生成多次波速度谱,然后应用同相轴追踪技术提取多次波同相轴旅行时信息,再通过同相轴优化追踪实现对多次波预测误差的校正,最后应用短时窗的FK滤波对多次波予以压制。该方法仅根据多次波同相轴旅行时信息进行匹配衰减,降低对多次波预测精度的要求,并且能够显著提高多次波压制的精度。理论模型实验与野外资料处理实验结果均表明,该方法的多次波剔除效果明显优于常规的多道维纳滤波方法与抛物线拉冬域蒙版滤波法。 |
| 关键词: 多次波匹配衰减 同相轴优化追踪 短时窗FK滤波 维纳滤波 抛物线拉冬域蒙版滤波 |
| DOI：10.3969/j.issn.1673-5005.2016.06.005 |
| 分类号::P 631.4 |
| 文献标识码:A |
| 基金项目:国家自然科学基金项目(41574105) |
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| Multiple matching attenuation method based on optimized event tracing |
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TAN Jun1,2,3, LI Jinshan1,2,3, SONG Peng1,2,3, WANG Lei1, ZHANG Xiaobo1, ZHONG Mengxuan1
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(1.College of Marine Geo-sciences, Ocean University of China,Qingdao 266100,China;2.Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China;3.Key Lab of Submarine Geosciences and Prospecting Techniques Ministry of Education,Ocean University of China,Qingdao 266100,China)
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| Abstract: |
| The paper introduces a multiple matching attenuation method based on optimized event tracing. Firstly, the method uses multiple data predicted by SRME to generate multiple velocity spectrum, then gets travel time information of multiple event by event tracing technique. An optimized tracing is used to correct the errors of predicted multiples and then a short-time FK fan filtering is applied to attenuate the multiples. The matching attenuation is based only on travel time information of multiple, thus it can lower the requirement in the multiple prediction precision to a certain extent. Meanwhile, optimized event tracing can significantly improve the accuracy of multiple elimination. Model simulations and field tests show that the method has better multiple eliminating effect than conventional multi-channel Wiener filter methods and the mask filtering methods in parabola Radon domain. |
| Key words: multiple matching attenuation event optimized tracing short-time window FK filtering Wiener filtering mask filtering in parabola Radon domain |
