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《Geophysical Prospecting For Petrole》 2005-01
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Method of 2-D wavelet transform in attenuating random noise.

Yang Liqiang, Song Haibin, Hao Tianvao and Jiang Weiwei.Exploration and Production ResearchInstitute, SINOPEC, Beijing 100083,China  
The random noise is an interference wave that has broadband and deteriorates signal-to-noise ratio of signal in seismic exploration. The commonused 1-D noise-eliminated methods have poor effects. The wavelet transform is a time-frequency analysis method, which can effectively eliminate random interference and preserve high and middle frequency components of signal according to its frequency-shared and local analyzed ability. The rationale of wavelet transform de-noising is introduced. A filter is designed to attenuating noise in accordance with the characteristics of seismic signals having a random disturbance with the theory of the 2-D wavelet transform. It is characterized by fast computation, good stability, desirable adaptive ability, and applications to various seismic data. Trial computations of a theoretical record and an actual field record showed that 2-D wavelet transform has obvious effect on separation of signal from noise.
【Fund】: 中国科学院知识创新重大项目(KZCX1-SW-18-01)资助
【CateGory Index】: P631.4
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