OBC施工中导航作业的关键技术剖析

Analysis on key techniques of navigation job in OBC operation

在OBC地震勘探施工中,导航作业对海底电缆的施放和二次定位、炮点的精确定位以及实现气枪震源船与地震采集仪器的同步作业起着重要的作用。本文阐述了OBC地震勘探施工中导航作业的工作原理,介绍了导航作业中电罗经的精度、声速的测定等系统误差的来源以及误差的消除方法。

In operation of OBC seismic exploration, the navigation job plays important role on deployment of ocean-bottom cable, precious positioning of shot points and synchronous job of airgun boat with seismic acquisition apparatus. The paper expounded the work principle of navigation job in operation of OBC seismic exploration, introduced the sources of such systematic errors as precision of gyrocompass and measurement of acoustic velocity etc in navigation job and how to remove them.