点源干扰的形态学降噪技术

发布时间：2018-05-25 01:12

  本文选题：形态学 + 噪声压制　； 参考：《石油物探》2016年03期

【摘要】：海上地震勘探采集资料中的点源干扰能量强,横向变化幅度小且出现位置不固定,极大地影响了海上地震资料的成像质量和解释精度。采用了基于形态学的噪声压制技术对点源干扰进行处理,设计了形态学滤波器分离点源噪声和有效信号,实现了点源干扰的压制。采用该方法对模拟地震资料和海上实际地震资料进行处理,并与传统的F-K去噪方法进行了对比,结果表明该方法在成功压制点源绕射干扰的同时,能够较好地保留原始地震信号的低频信息,完全恢复了信号与噪声重叠处的有效信号振幅。处理过程中,该方法不受随机噪声的影响,具有很强的抗随机噪声能力。
[Abstract]:The point source interference energy in offshore seismic data acquisition is strong, the lateral variation amplitude is small and the position is not fixed, which greatly affects the imaging quality and interpretation accuracy of offshore seismic data. The noise suppression technique based on morphology is adopted to deal with the point source interference. The morphological filter is designed to separate the point source noise from the effective signal, and the suppression of the point source interference is realized. The proposed method is used to process simulated seismic data and actual offshore seismic data, and is compared with the traditional F-K denoising method. The results show that the proposed method is successful in suppressing point source diffraction interference at the same time. The low frequency information of the original seismic signal can be well preserved and the effective signal amplitude at the overlap between the signal and the noise can be completely recovered. In the process of processing, the method is not affected by random noise and has strong ability to resist random noise.
【作者单位】： 北京信息科技大学信息与通信工程学院;中国石油大学(北京)油气资源与探测国家重点实验室;保利协鑫石油天然气集团控股有限公司;中国石油天然气集团公司东方地球物理勘探有限责任公司国际勘探事业部;
【基金】：国家重点基础研究发展计划(973计划)项目(2013CB228602) 国家科技重大专项(2011ZX05042-003-002) 北京信息科技大学科研基金项目(1425009)共同资助~~
【分类号】：P631.46
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本文编号：1931400