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A Comparative Study on the Excitation of Large Volume Airgun Source with Different Combinations in Hutubi, Xinjiang, China
SU Jinbo1, WANG Qiong1, CHEN Hao2, WEI Yunyun1, ZHANG Wenxiu1, WANG Haitao3
1.Earthquake Agency of Xinjiang Uygur Autonomous Region, Urumqi 830011, China;2.The First Monitoring and Application Center, CEA, Tianjin 300180, China;3.China Earthquake Networks Center, Beijing 100045, China
摘要:
In order to study the excitation of large-volume airgun source with different combinations in Hutubi, Xinjiang,China,we conducted a targeted experiment. The method of time-frequency analysis is used to study the signals recorded by a seismometer on the shore of the excited pool, and it is concluded that different gun combinations will lead to different frequency of bubble pulse signals. Besides, linear combination method is used to analyze the signal-to-noise ratios of signals excited by different gun combinations which was recorded by seismic stations around the airgun source. In order to improve the signal-to-noise ratios, it is more effective to increase the activation energy (the number of excited guns at the same time) than to stack the excited signals with smaller energy repeatedly.
关键词:  Airgun source  Different gun combinations  Energy characteristic  Frequency characteristic  Signal-to-noise ratio
DOI:10.19743/j.cnki.0891-4176.201904003
分类号:
基金项目:This project is sponsored by the National Key R&D Program of China(2018YFC1503200), the National Natural Science Foundation of China(41474051) and Earthquake Science Foundation of Xinjiang(201902).
A Comparative Study on the Excitation of Large Volume Airgun Source with Different Combinations in Hutubi, Xinjiang, China
SU Jinbo1, WANG Qiong1, CHEN Hao2, WEI Yunyun1, ZHANG Wenxiu1, WANG Haitao3
1.Earthquake Agency of Xinjiang Uygur Autonomous Region, Urumqi 830011, China;2.The First Monitoring and Application Center, CEA, Tianjin 300180, China;3.China Earthquake Networks Center, Beijing 100045, China
Abstract:
In order to study the excitation of large-volume airgun source with different combinations in Hutubi, Xinjiang,China,we conducted a targeted experiment. The method of time-frequency analysis is used to study the signals recorded by a seismometer on the shore of the excited pool, and it is concluded that different gun combinations will lead to different frequency of bubble pulse signals. Besides, linear combination method is used to analyze the signal-to-noise ratios of signals excited by different gun combinations which was recorded by seismic stations around the airgun source. In order to improve the signal-to-noise ratios, it is more effective to increase the activation energy (the number of excited guns at the same time) than to stack the excited signals with smaller energy repeatedly.
Key words:  Airgun source  Different gun combinations  Energy characteristic  Frequency characteristic  Signal-to-noise ratio