The addition-subtraction method for removing linear noise:A case study of the seismic data in Ordos loess plateau
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摘要: 由于鄂尔多斯黄土塬探区的地貌特点和表层复杂的地震地质条件,所采集的地震资料存在很强的多组线性干扰波,要消除这些线性干扰,提高地震信号的信噪比是地震资料处理中的一个重要环节。笔者主要针对该区原始地震资料中存在的各类线性干扰波、多组面波等波场进行分析研究,基于线性干扰波的线性特性、倾角特性和相干性,采用加减法去噪技术进行压制。与f?k倾角滤波处理结果对比分析表明,加减法是压制线性干扰能力很强的一种高保真方法,提高了处理质量,效果显著。Abstract: Because of the topography characteristics and the complicated surface seismic geological conditions of the exploration area in Ordos Loess Plateau,the seismic data acquired have strong multiple sets of linear noise.The elimination of the linear noise and the im?provement of SNR of seismic signal is one of the key problems in seismic data processing.In this paper,the authors conducted a compre?hensive analysis and study of all types of linear noise as well as the multiple sets of surface waves. Based on the linear noise's linear characteristics,dip features and coherence properties, the authors used the addition?subtraction method to remove the linear noise. A comparative analysis shows that this means is a high?fidelity method that has a strong capability for suppressing linear noise and impro?ving the quality of data processing,thus showing a significant effect.
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Key words:
- loess plateau /
- linear noise /
- f-k dip filter /
- addition-subtraction method
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