时频域有色谱校正

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英文篇名：Correction of colored spectrum in time frequency domain 中文刊名：石油物探 英文刊名：Geophysical Prospecting For Petrole 作者：夏洪瑞 ; 周开明 ; 陈德刚 ; 刘新强 英文作者：Xia Hongrui ; Zhou Kaiming ; Chen Degang ; Liu Xinqiang(Computation Center of Geophysical Prospecting Company ; jianghan Oilfield ; Qianjiang 433100 ; China) 中文关键词：时频域 ; 有色谱校正 ; 小波变换窄档分频 ; 频泄现象 英文关键词：time frequency domain ; correction of colored spectrum ; wavelet transform in a narrow frequency band ; frequencyleak 出版日期：2002-09-25 机构：江汉油田物探处计算中心,江汉油田物探处计算中心,江汉油田物探处计算中心,江汉油田物探处计算中心 湖北潜江 433100 ,湖北潜江 433100 ,湖北潜江 433100 ,湖北潜江 433100 年：2002 期：03 出版单位：石油物探

摘要

振幅谱校正是消除地震资料中非一致性的一种方法。实际生产中的几种振幅谱校正技术在应用中都存在着局限性,以致使校正过的记录不能恢复到最理想的形态。时频域有色谱校正技术可以很好地解决这一问题。其数学原理为:采用以直代曲的办法,将窄频带中振幅谱取为一常数,这样,在时域振幅谱为一冲激函数,频域的振幅谱校正可以在时域中简单实现。利用模型道法、互相关法及已知波形法给出期望的有色谱,为校正提供依据;利用小波变换的正交性来克服傅氏变换引起的频泄现象。实际资料处理表明,该方法能很好地消除地震记录中振幅非一致性问题。
Correction of amplitude spectrum is a method used to eliminate the inconsistency in seismic data. Due to limitations of methods available for correction of amplitude spectrum, the corrected records are not in their ideal wave shape. A method for correction of colored spectrum in time frequency domain is presented in the paper, provided that amplitude spectrum is constant in a narrow band and the time response of the amplitude spectrum is a spike pulse. In this case amplitude spectrum of frequency domain can be corrected easily in time domain. Colored spectrum is calculated with model method, cross correlation method, or known wave shape method. The so-called frequencyleak associated with Fourier transform is overcome with wavelet transform. Processing on real data shows that this method is able to eliminate the inconsistency in seismic data effectively.

引文

1 熊翥.地震数据数字处理应用技术[M].北京:石油工业出版社,1993,263～268
    2 赵波,俞寿朋,聂勋碧,等.谱模拟反褶积方法及其应用[J].石油地球物理勘探,1996,31（1）:101～106
    3 程乾生.信号数字处理的数学原理[M].北京:石油工业出版社,1979.17～36