曲波变换三维地震数据去噪技术

发布时间：2018-02-10 23:48

本文关键词： 曲波变换阈值三维去噪多尺度　出处：《石油地球物理勘探》2017年02期 　论文类型：期刊论文

【摘要】：常规去噪方法主要用于二维地震资料的处理,但噪声也存在于三维数据空间,导致常规去噪方法效果较差。为此,选用多尺度、多方向的二维曲波变换进行三维地震资料去噪。首先抽取含噪三维地震数据的时间切片进行多尺度、多方向分解,在曲波域采用局部阈值法去噪,对曲波变换后的每一个尺度选取一个合适的阈值因子,然后通过阈值处理,得到各尺度下的有效波曲波系数,最后将提取的有效波曲波系数进行逆变换重构出地震信号,达到去噪的目的。理论模型与实际资料的处理结果表明,与其他去噪方法相比,该方法最大限度地保留了地震数据的有效信号,达到了更好的去噪效果,具有较好的应用前景。
[Abstract]:The conventional de-noising method is mainly used in the processing of two-dimensional seismic data, but the noise also exists in the three-dimensional data space, which leads to the poor effect of the conventional de-noising method. The multidirectional 2-D Qu Bo transform is used to denoise the 3D seismic data. Firstly, the time slice of the noisy 3D seismic data is extracted for multi-scale and multi-directional decomposition, and the local threshold method is used to de-noise the seismic data in Qu Bo domain. Select a suitable threshold factor for each scale after Qu Bo transformation, then get the effective wave Qu Bo coefficient of each scale through threshold processing, and finally reconstruct the seismic signal by inverse transformation of the extracted effective wave Qu Bo coefficient. The theoretical model and the actual data processing results show that compared with other denoising methods, this method can retain the effective signal of seismic data to the maximum extent, achieve better denoising effect, and have a better application prospect.
【作者单位】：东华理工大学放射性地质与勘探技术国防重点学科实验室;中国石油大学(北京)海洋石油勘探国家工程实验室;
【基金】：国家自然科学基金(41304097,41664006,41364004,41504095,41604104) 江西省杰出青年人才项目江西省自然科学基金(20151BAB203044) 国家留学基金委(201508360061) 江西省百人远航工程项目(2015-141)联合资助
【分类号】：P631.44

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