基于曲波变换的三维地震数据同时重建和噪声压制（英文）

发布时间：2018-05-03 07:39

本文选题：曲波变换 + 数据重建　；参考：《Applied Geophysics》2017年01期

【摘要】：野外地震数据包含各种随机噪声干扰且在空间方向常进行不规则欠采样,影响后续资料处理,存在数据重建和噪声压制问题,而大多数据重建方法只能独立进行,对于噪声压制则无能为力,对于含噪地震数据的重建效果不理想,起不到压制噪声的效果。为此本文选用多尺度多方向的二维曲波变换进行三维地震数据同时重建与噪声压制,在此过程中引入凸集投影算法(POCS),采用指数平方根衰减规律的阈值参数及软阈值算子对每个时间切片单独进行重建。在此基础上,引入加权因子策略,使得在的重建过程中减少噪声对重建结果的影响,最终实现了一种能够同时进行三维地震数据重建和噪声压制的方法。通过与先重建后去噪以及傅里叶变换处理方法的比较,表明了该方法效果显著,这对于指导复杂地区数据采集和缺失地震道重建方面具有重要的实用价值。
[Abstract]:The field seismic data contain various random noise disturbances and often carry out irregular under-sampling in the spatial direction, which affect the subsequent data processing. There are problems of data reconstruction and noise suppression, but most of the data reconstruction methods can only be carried out independently. There is no way to suppress noise, but the reconstruction effect of noisy seismic data is not ideal and the effect of noise suppression can not be achieved. Therefore, in this paper, the two-dimensional Qu Bo transform with multi-scale and multi-direction is used to reconstruct the 3D seismic data and suppress the noise simultaneously. In this process, the projection algorithm of convex set is introduced, and the threshold parameters of exponential square root attenuation law and the soft threshold operator are used to reconstruct each time slice separately. On this basis, a weighted factor strategy is introduced to reduce the impact of noise on the reconstruction results in the reconstruction process, and finally a method of simultaneous 3D seismic data reconstruction and noise suppression is realized. The comparison with the method of first reconstruction and then denoising and Fourier transform shows that the method is effective and has important practical value in guiding data acquisition and reconstruction of missing seismic traces in complex areas.
【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;海洋石油勘探国家工程实验室中国石油大学(北京);
【基金】：sponsored by the National Natural Science Foundation of China(Nos.41304097 and 41664006) the Natural Science Foundation of Jiangxi Province(No.20151BAB203044) the China Scholarship Council(No.201508360061) Distinguished Young Talent Foundation of Jiangxi Province(2017)
【分类号】：P631.44

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