石油物探2017，Vol.56Issue(2)：222-231,10.DOI:10.3969/j.issn.1000-1441.2017.02.009
基于离散曲波变换字典和二维局部离散余弦变换字典组合的面波压制
Ground roll attenuation based on the combination of discrete curvelet transform dictionary and two-dimensional local discrete cosine transform dictionary
摘要
Abstract
According to the different morphological characteristics between ground roll and reflected wave in seismic record,we use morphological component analysis based on the combination of discrete curvelet transform dictionary and two-dimensional local discrete cosine transform dictionary to attenuate ground roll.Firstly,we choose discrete curvelet transform dictionary to sparsely represent ground roll,and two-dimensional local discrete cosine transform dictionary to sparsely represent reflected wave respectively.Then the ground roll separation model of seismic record can be constructed under the two dictionaries.Finally,by solving the model using block coordinate relaxation algorithm,we can separate the ground roll and reflected wave and thus attenuate ground roll effectively.The processing results of synthetic and real seismic records indicate that our method can not only suppress strong ground roll noise but also preserve reflected wave effectively.关键词
稀疏表示/面波压制/形态成分分析/离散曲波变换/二维局部离散余弦变换Key words
sparse representation/ground roll attenuation/morphological component analysis/discrete curvelet transform/two-dimensional local discrete cosine transform分类
天文与地球科学引用本文复制引用
毕云云,汪金菊,徐小红,屈光中,张洋..基于离散曲波变换字典和二维局部离散余弦变换字典组合的面波压制[J].石油物探,2017,56(2):222-231,10.基金项目
国家重大科研装备研制项目“深部资源探测核心装备研发”(ZDYZ2012-1-06-05)资助.This research is financially supported by the National Scientific Equipment Development Project of China (Grant No.ZDYZ2012-1-06-05). （ZDYZ2012-1-06-05）
