仪器数据道和辅助道不同步问题对地震资料的影响分析
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摘要
针对可控震源采集时辅助道参考信号的延迟问题,本文分析了仪器记录和震源启动的同步原理,说明辅助道参考信号延迟其实是数据采集超前记录引起的,利用实际数据模拟分析了参考信号延迟对相关后单炮记录初至时间、能量、频率的影响,总结了识别和解决地震数据采集与辅助道参考信号不同步的方法,对野外技术人员发现和解决该问题具有实际意义。
The reference signal delay on the auxiliary channels often occurs during vibroseis acquisition.We review in this paper the synchronization concept between the seismic recording system and the vibrator,and find out that this delay actually is caused by seismic data recorded earlier than the auxiliary channel data during the acquisition.We analyze the delay affects on first arrivals,energy and frequency of a correlated single shot record,and propose some approaches for asynchronous problem identification and some solutions to them,which may be helpful for field seismologists.
The reference signal delay on the auxiliary channels often occurs during vibroseis acquisition.We review in this paper the synchronization concept between the seismic recording system and the vibrator,and find out that this delay actually is caused by seismic data recorded earlier than the auxiliary channel data during the acquisition.We analyze the delay affects on first arrivals,energy and frequency of a correlated single shot record,and propose some approaches for asynchronous problem identification and some solutions to them,which may be helpful for field seismologists.
引文
[1]程乾生.信号数字处理的数学原理.北京:石油工业出版社,1996,294～295
[2]陆基孟.地震勘探原理.山东东营:石油大学出版社,1996,109～111
[3]Brian J Evans.A Handbook for Seismic Data Acqui-sition in Exploration.Society of Exploration Geo-physicists,2005,110～113
[4]渥.伊尔马滋著[美],黄绪德等译.地震数据处理.北京:石油工业出版社,1994,17～19
[2]陆基孟.地震勘探原理.山东东营:石油大学出版社,1996,109～111
[3]Brian J Evans.A Handbook for Seismic Data Acqui-sition in Exploration.Society of Exploration Geo-physicists,2005,110～113
[4]渥.伊尔马滋著[美],黄绪德等译.地震数据处理.北京:石油工业出版社,1994,17～19
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