石油物探2018，Vol.57Issue(1)：79-85,7.DOI:10.3969/j.issn.1000-1441.2018.01.011
时频域稀疏优化谐波噪声压制方法及其在准噶尔盆地高密度地震勘探中的应用
Harmonic noise suppression in the time-frequency domain via sparse optimization and application to high-density seismic exploration in Junggar Basin,China
摘要
Abstract
Severe harmonic noise often interferes with seismic records from vibroseis slip-sweep acquisition,greatly reducing the signal-to-noise ratio of shot gathers.Therefore,effectively suppressing harmonic noise is a precondition for high-precision and high-resolution seismic data prestack,post-stack inversion,and attribute analysis.Based on different time-frequency distributions of the effective signal and harmonic noise,this paper presents a novel method to separate harmonic noise from seismic records.The key step is the construction of redundant waveform dictionaries,which can provide a sparse representation of signal and harmonic noise.A scheme is proposed for determining the main parameters of the sparse representation dictionary.The proposed method was applied to a typical single shot record of three-dimensional seismic data in the Ma Lake area of Junggar Basin,China.The results showed that the proposed method can suppress harmonic noise effectively while maintaining good fidelity compared with conven-tional frequency-dependent noise attenuation (FDNAT).关键词
滑动扫描/时频域稀疏优化方法/保真性/稀疏表示字典/可控震源Key words
slip-sweep/sparsity optimization method in time-frequency domain/fidelity/sparse representation dictionary/vibroseis分类
天文与地球科学引用本文复制引用
罗勇,刘宏杰,毛海波,蒋立,师振盛..时频域稀疏优化谐波噪声压制方法及其在准噶尔盆地高密度地震勘探中的应用[J].石油物探,2018,57(1):79-85,7.基金项目
国家自然科学基金(41774135,41504092,41504093)、中国博士后科学基金(2016T90925,2015M572567)及中央高校基本科研业务费专项资金联合资助. This research is financially supported by the National Natural Science Foundation of China (Grant Nos.41774135,41504092,41504093 ),China Postdoctoral Science Foundation (Grant Nos.2016T90925,2015M572567)and the Fundamental Research Funds for the Central Universities. （41774135,41504092,41504093）
