石油地球物理勘探2026，Vol.61Issue(1)：55-62,8.DOI:10.13810/j.cnki.issn.1000-7210.20240213
基于四象限叠加的海底节点高精度二次定位
High-precision secondary positioning of OBN based on four-quadrant stacking
宋常洲 1宋强功 1孙鹏远 1范振文 2平俊彪 2徐剑2
作者信息
- 1. 东方地球物理公司物探技术研究中心,河北涿州 072751||油气勘探计算机软件国家工程研究中心,河北涿州 072751
- 2. 东方地球物理公司,河北涿州 072751
- 折叠
摘要
Abstract
In ocean bottom node(OBN)seismic exploration,significant discrepancies often exist between the actual node positions and the initial surveyed locations due to factors such as ocean currents,tides,topographic variations,and fishing vessel dragging,necessitating secondary positioning.To address this,a high-precision secondary positioning method based on four-quadrant stacking is proposed.Specifically,within a relative coordi-nate system,shot points are divided into four quadrants according to their azimuth.Linear moveout correction and common receiver point stacking are performed separately for shot points in each quadrant.Subsequently,the displacement of the node from the surveyed position to the actual position is decomposed into two mutually per-pendicular components.These two components are determined by analyzing the first arrival time differences from the common receiver points in each quadrant,which thereby enables precise estimation of the node's actual coordinates.Application to field data demonstrates that this method achieves high-precision secondary position-ing of nodes.Moreover,the four-quadrant stacking strategy significantly improves the reliability of first arrival picking.Compared with traditional methods,this approach offers higher positioning accuracy and efficiency,showing excellent engineering applicability and promising potential for broader adoption.关键词
海底节点/四象限叠加/二次定位/线性动校正Key words
ocean bottom node(OBN)/quadrant stacking/secondary positioning/linear moveout correction(LMO)分类
天文与地球科学引用本文复制引用
宋常洲,宋强功,孙鹏远,范振文,平俊彪,徐剑..基于四象限叠加的海底节点高精度二次定位[J].石油地球物理勘探,2026,61(1):55-62,8.
