反褶积与信噪比的关系研究

详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文

英文篇名：Study on the Relationship Between Deconvolution and Signal-to-Noise Ratio 中文刊名：西安石油学院学报(自然科学版) 英文刊名：Journal of Xi'an Petroleum Institute 作者：周洁玲 ; 成世琦 英文作者：ZHOU Jie-ling ; CHENG Shi-qi (Applied Geophysics Research Institute ; Southwest Petroleum Institute ; Nanchong 637001 ; Sichuan ; China) 中文关键词：反褶积 ; 信噪比 ; 分辨率 ; 滤波 ; 白噪化 英文关键词：deconvolution ; signal-to-noise ratio ; resolution ; filtering ; white noise 出版日期：2002-07-26 机构：西南石油学院应用地球物理研究所,西南石油学院应用地球物理研究所 四川南充637001 ,四川南充637001 年：2002 期：04 出版单位：西安石油学院学报(自然科学版)

摘要

在地震资料数字处理中 ,分辨率与信噪比是一对相互制约的矛盾 ,为了在反褶积处理过程中控制信噪比 ,从理论上分析了反褶积后剖面信噪比降低的原因 .以不同相位子波为例 ,从时间域出发 ,利用最小平方反滤波原理计算出反褶积算子 ,并验证了反褶积后剖面信噪比的降低是受反子波能量的影响 .为了兼顾分辨率和信噪比 ,进而分析讨论了反褶积中的白噪化问题 ,提出可以用加入白噪的方法来控制信噪比 ,但白噪不易加入过大 ,否则 ,由于加入白噪后求出的反子波不再是原来子波的逆 ,从而又将影响剖面分辨率的提高
After seismic record is deconvoluted, its resolution is decreased. In order to control profile signal-to-noise ratio in the processing of deconvolution, the cause is analyzed in theory why the signal-to-noise ratio is decreased after deconvolution. Some different phase wavelets are taken as examples, their deconvolution operators were calculated based on the principle of minimal-square-deconvolution. It is proven that the signal-to-noise ratio is controlled by the energy of the inverse wavelet after deconvolution, and the greater the energy, the more the signal-to-noise ratio is decreased. It is put forward that the drop of the signal-to-noise ratio can be controlled by adding white noise. But the white noise is can't be added too much, otherwise the increase of the signal-to-noise ratio is limited because the inverse wavelet obtained after the white noise is added is not the inverse of the original wavelet.

引文

[1]　李庆忠.走向精确勘探的道路[M].北京:石油工业出版社,1993.12-30.
    [2]　程乾生.信噪比与分辨率及线性滤波与反滤波[J].石油地球物理勘探,1987,22(6),636-643.
    [3]　黄绪德.反褶积与地震道反演[M].北京:石油工业出版社,1992.11-15.