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Analysis of LD Block Seismic Data Noise Characteristics and Suppression
Author(s): 
Pages: 271-278
Year: Issue:  3
Journal: Chinese Journal of Engineering Geophysics

Keyword:  低信噪比复合多域多变换去噪;
Abstract: LD区块浅层含气范围很广,中深层是高温高压富集区,且地震噪声复杂,使得地震资料信噪比低,资料品质低,严重影响后续资料处理和解释的精度.本文首先采用频谱分析、自相关等技术分析了该区影响地震资料品质的地质因素和噪声特点,并发现常规压制噪声技术在靶区适应性差.为此,本文提出一套以复合多域多变换多层次去噪方法压制LD区块噪声的高精度高保真技术系列.该技术系列分别采用了复合多域去噪、多变换去噪、叠前叠后去噪等手段,对地震资料进行处理.处理结果表明,用文中提出的方法去噪,能在保持有效信号的前提下,最大可能地消除噪声.
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