| 基于正交多项式变换的CMP动校正道集随机噪声压制 |
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| 引用本文： | 薛亚茹,陆文凯,陈小宏,黄饶,马继涛.基于正交多项式变换的CMP动校正道集随机噪声压制[J].地球物理学进展,2009,24(1):159-163. |
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| 作者姓名： | 薛亚茹 陆文凯 陈小宏 黄饶 马继涛 |
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| 作者单位： | 1. 中国石油大学(北京),北京,102249
2. 清华大学自动化系信息处理所,北京,100084 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 本文提出了一种新的基于正交多项式变换来压制动校正后CMP道集上随机噪声的方法,将地震资料经过正交多项式变换,建立正交多项式系数谱,该谱描述了地震资料在正交多项式域的能量分布,可以较好地分离有效波和随机噪声,相对于固定阶次的基于正交多项式变换压制噪声的方法,所提出的方法根据能量随阶次变化的规律,自适应确定表达有效信号的正交多项式阶次,既提高了信号和噪声的分离效果,又有效地保护了地震信号中的AVO信息,对人工合成数据和实际资料的处理结果表明了所提出方法的有效性.
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| 关 键 词： | 降噪 正交多项式变换 正交多项式系数谱 自适应阶多项式 |
| 收稿时间： | 2008-2-13 |
| 修稿时间： | 2008-6-25 |
Random noise attenuation based on orthogonal polynomials transform for CMP gathers |
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| XUE Ya-Ru,LU Wen-Kai,CHEN Xiao-Hong,HUANG Rao,MA Ji-tao.Random noise attenuation based on orthogonal polynomials transform for CMP gathers[J].Progress in Geophysics,2009,24(1):159-163. |
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| Authors: | XUE Ya-Ru LU Wen-Kai CHEN Xiao-Hong HUANG Rao MA Ji-tao |
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| Institution: | (1.ChinaUniversityofpetroleum(Beijing),Beijing102249,China;2.DepartmentofAutomation,TsinghuaUniversity,Beijing100084,China) |
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| Abstract: | A new random noise attenuation method is proposed based on orthogonal polynomials transform for NMO CMP gathers. After orthogonal polynomials transform, the CMP data are transformed to spectra of orthogonal polynomials coefficients, which describe the energy distribution of CMP data and can distinguish between effective waves and noises. The orthogonal polynomials order of effective waves is confirmed according to the energy variation with order increasing. This method can not only attenuate the noise but also preserve the AVO properties. The processing of synthetic and real data shows good results. |
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| Keywords: | noise attenuation orthogonal polynomials transform spectrum of orthogonal polynomials coefficients adaptive order polynomials |
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