| 压制地震勘探随机噪声的分段时频峰值滤波方法 |
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| 引用本文： | 林红波,李月,徐学纯.压制地震勘探随机噪声的分段时频峰值滤波方法[J].地球物理学报,2011,54(5):1358-1366. |
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| 作者姓名： | 林红波 李月 徐学纯 |
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| 作者单位： | 1. 吉林大学通信工程学院,长春 130012;
2. 吉林大学地球科学学院,长春 130061 |
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| 基金项目： | 国家自然科学基金项目，吉林大学交叉学科项目 |
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| 摘 要： | 提高勘探资料信噪比是地震勘探的主要内容之一.本项研究利用短时能量将记录分成能量均衡的若干段,获得减少尺度变换误差的分段时频峰值滤波方法,并运用端点拓展和与地震信号特征匹配的多级时窗参数改进时频峰值滤波精度.理论模型和共炮点资料处理结果表明,分段时频峰值滤波很好地消除了尺度变化误差引起的信号波形阶梯状畸变,能够在压制强随...
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| 关 键 词： | 随机噪声 时窗长度 时频峰值滤波 地震勘探 短时能量 |
| 收稿时间： | 2009-10-22 |
Segmenting time-frequency peak filtering method to attenuation of seismic random noise |
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| LIN Hong-Bo,LI Yue,XU Xue-Chun.Segmenting time-frequency peak filtering method to attenuation of seismic random noise[J].Chinese Journal of Geophysics,2011,54(5):1358-1366. |
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| Authors: | LIN Hong-Bo LI Yue XU Xue-Chun |
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| Institution: | 1. College of Communication and Engineering, Jinlin University, Changchun 130012, China;
2. College of Earth and Science, Jinlin University, Changchun 130061, China |
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| Abstract: | It is one of the major subjects of seismic exploration to improve signal to noise ratio of seismic data. The segmented time-frequency peak filtering (S-TFPF) is proposed to reduce the error induced by scale transform of TFPF by dividing a trace of seismic data into some segments with even energy based on the short-time energy principle. Moreover, endpoint delay method is utilized to avoid the endpoint distortion. The multiple time-windowing parameters, which match the characteristics of signal, are also set for the segments. The S-TFPF is applied to synthetic records and common-shot records, and the results show that the method can retain signal characteristics better while suppress the random noise. Segmenting can effectively attenuate distortion of signal caused by scale transform error and can be applied to practical seismic exploration at low SNR. |
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| Keywords: | Random noise Time-window length Time-frequency peak filtering Seismic exploration Short-time energy |
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