拖缆三维地震双船作业的设备配置实例
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摘要
常规单船海洋拖缆三维采集作业时,由于施工区存在钻井平台、采油平台等障碍物,经常会留有采集资料空白区,而使用双船作业方式(Undershooting)——一艘震源船进行震源激发;另一艘拖缆船上的震源不再激发(只保留震源上RGPS和声学装备的定位功能),而是尽可能地靠近障碍物使用拖缆接收地震数据,这样即可避免单船施工的缺陷而获得空白区的地震资料。本文详细介绍了双船作业时需要的设备及其相关配置和关键参数的设置。
Blank areas often exist due to the drilling platform,oil platforms and other obstacles in conventional single streamer 3D acquisition operation.Undershooting mode will avoid the defects of single-boat and acquire seismic data in blank area.In this mode,one vibrator source excitation,another one only keep the RGPS and acoustic positioning function and as close as possible to obstacles to receive seismic data with streamer.This paper introduces how to get the Undershooting configuration and how to set key parameters.
Blank areas often exist due to the drilling platform,oil platforms and other obstacles in conventional single streamer 3D acquisition operation.Undershooting mode will avoid the defects of single-boat and acquire seismic data in blank area.In this mode,one vibrator source excitation,another one only keep the RGPS and acoustic positioning function and as close as possible to obstacles to receive seismic data with streamer.This paper introduces how to get the Undershooting configuration and how to set key parameters.
引文
1鲁军,张白林,杨凯.三维地震勘探双船作业中炮船的应用.西南石油学院学报.2004
2 Concept系统公司.Spectra海洋地球物理勘探综合导航系统用户手册.2003
2 Concept系统公司.Spectra海洋地球物理勘探综合导航系统用户手册.2003
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