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Probability Data Screening Method in Airgun Signal Processing Application
LI Jun, YOU Xiuzhen, HU Shufang
Fujian Earthquake Agency, Fuzhou 350003, China
摘要:
The signal excited by the airgun source is weak, and is easily affected by human motion noise, instrument failure, and earthquake and blasting events, resulting in insufficient utilization of the amplitude information of the airgun signal. The effective removal of interference and the preservation of true amplitude information of the signal is difficult in airgun signal processing. Based on the randomness of noise and the highly repetitive characteristics of airgun signals, we propose probability data screening method. The airgun data from experiments conducted in the Ansha Reservoir and Shanmei Reservoir in Fujian Province in June, 2017 are taken as the research object to assess the effect in practical applications. The results show that the probability data screening method can automatically reject multiple interferences and effectively preserve the amplitude information of the signal by screening out large amplitude records in appropriate proportions. Compared with direct linear superposition, the probability-related linear superposition method can effectively reduce the impact of abnormal interference, and significantly improve the quality of the observed data.
关键词:  Reservoir airgun  Normal distribution  Linear superposition  Interference removal  Amplitude information
DOI:10.19743/j.cnki.0891-4176.201902002
分类号:
基金项目:This project is Joint Funding by the National Natural Science Foundation of China (41774068) and the National Natural Science Foundation of China (41790461).
Probability Data Screening Method in Airgun Signal Processing Application
LI Jun, YOU Xiuzhen, HU Shufang
Fujian Earthquake Agency, Fuzhou 350003, China
Abstract:
The signal excited by the airgun source is weak, and is easily affected by human motion noise, instrument failure, and earthquake and blasting events, resulting in insufficient utilization of the amplitude information of the airgun signal. The effective removal of interference and the preservation of true amplitude information of the signal is difficult in airgun signal processing. Based on the randomness of noise and the highly repetitive characteristics of airgun signals, we propose probability data screening method. The airgun data from experiments conducted in the Ansha Reservoir and Shanmei Reservoir in Fujian Province in June, 2017 are taken as the research object to assess the effect in practical applications. The results show that the probability data screening method can automatically reject multiple interferences and effectively preserve the amplitude information of the signal by screening out large amplitude records in appropriate proportions. Compared with direct linear superposition, the probability-related linear superposition method can effectively reduce the impact of abnormal interference, and significantly improve the quality of the observed data.
Key words:  Reservoir airgun  Normal distribution  Linear superposition  Interference removal  Amplitude information