可控震源有线一致性分析方法探讨

Method of Hardwire Test of Vibroseis

有线一致性测试是可控震源施工中定期检测分析的项目,以确保震源机械和电控系统的状态满足施工要求,保证采集资料品质。由于目前采用可控震源施工的采集项目多为24小时连续作业,传统通过电缆连接震源和仪器进行有线一致性的测试方法需要中断野外生产采集,影响有效采集时间。基于多个采用VE464电控箱体的地震采集项目,提出通过分析导航系统实时采集的震源特征信号和仪器真参考信号代替传统的有线测试方法,获得甲方认可并在生产项目中应用。

Hardwire test is a regular inspection and analysis method for checking if the state of vibrator machinery and electronic control system meet the standard requirements to ensure the acquired data have good quality.As most of the projects using vibrators are operated continuously throughout the day,the traditional method of using the cables to connect the vibrator and the recorder has to stop the acquisition,which affects the efficiency.Based on a number of seismic acquisition projects with VE464 electronic control box in the vibrator,this paper proposes a new hardwire test method to replace the traditional one by analyzing the vibrator characteristic signals recorded by the guidance system in real time and true reference signals acquired by the recorder.The method has obtained the approval of the client and has been applied in projects.