浅谈OBN节点配重对点位偏移的影响  

An overview of the effect of OBN node counterweights on position offset

作　　者：任宜林 薛立武[1] 宋立辉 井乔 封召鹏 REN Yilin;XUE Liwu;SONG Lihui;JING Qiao;FENG Zhaopeng

机构地区：[1]中国石油集团东方地球物理勘探有限责任公司西安物探装备分公司,陕西西安710082

出　　处：《物探装备》2024年第6期384-388,共5页Equipment for Geophysical Prospecting

摘　　要：OBN是当前海洋地震采集的主流方法,其点位精度是评鉴地震采集资料的主要因素之一。在实际海上勘探作业中,使用GPS及其他定位系统按照设计坐标在海面投放节点,由于受到OBN节点自身重力、海水浮力、人工抛掷误差、船体运行速度、海浪洋流等因素的影响,OBN的实际沉底点位往往偏离预设位置。本文以OBN节点自重为研究对象,研究不同的洋流方向流速对不同自重的节点点位偏移的影响,并将其与实际结合。OBN is the main method of marine seismic acquisition at present,and its point accuracy is one of the main factors in evaluating seismic data.In actual offshore exploration operations,GPS and other positioning systems are used to deploy nodes into the sea according to the designed coordinates.Due to the influence of OBN nodes'own gravity,sea buoyancy,artificial throwing error,hull speed,wave current and other factors,the actual bottom position of OBN often deviates from the preset position.This paper takes OBN weight as the research object to study the influence of different ocean current directions and ocean current velocity on node point offset of different weight,and combines the conclusion with the practice.

关 键 词：OBN 力学模型 粘滞阻力 洋流 点位偏移 

分 类 号：P631[天文地球—地质矿产勘探]