摘要
浅地层剖面仪、单道地震仪器采集的原始数据通常以二进制形式保存在SEGY型数据文件中,定位信息保存在数据道头,一般而言该定位信息是GPS天线头或导航参考点的坐标,不是震源的真实位置,它们之间存在一个固定的偏移量。该类数据的处理大多采用OMEGA、FOCUS、SU、RadExpro等地震处理系统来处理,并未考虑定位数据的错位情况,影响了后续地质解释的精度。利用导航数据文件的船艏向信息和SEGY数据中的坐标数据匹配,根据震源与SEGY中道记录位置的相对关系,重新计算震源坐标,改写SEGY数据文件。该方法可为资料的综合解释提供了准确的地理位置。
Data collected by sub-bottom profiler and single seismic is always recorded in SEGY data files of binary coding,with position information saved in data head.Usually,the position in the head is not the real position of sources,but the coordinates of the GPS antenna or navigation reference point.There is a fixed offset between the two.We often process these data using such seismic processing systems as OMEGA,SU and RadExpro,and never consider the offset of positioning data.This will certainly affect the precision of the geological interpretation in subsequent processing.In this research,we recommend matching the headings from the navigation data and the coordination from SEGY files,re-computing the coordination of the source on the basis of relative position between the source and the position recorded in a SEGY file,and re-writing the SEGY data files.The method can provide correct geographic position for comprehensive data interpretation.
作者
曾凡祥
徐岩
刘玉萍
ZENG Fanxiang;XU Yan;LIU Yupin(Key Laboratory of Mineral Resources,Ministry of Natural Resources,Guangzhou 510075,China;GuangZhou Marine Geological Survey,China Geology Survey,Guangzhou 510760,China)
出处
《海洋地质前沿》
CSCD
2019年第7期39-46,共8页
Marine Geology Frontiers
基金
中国大洋协会多金属结核资源勘查项目(DY135-N2-1-02)
中国地质调查局项目(DD20191007,DD20191002)
关键词
浅地层剖面
单道地震
浅层物探
SEGY
UTM投影
坐标转换
sub-bottom profiler
single seismic
superficial geophysical prospecting
SEGY
UTM projection
coordinate transformation
作者简介
曾凡祥(1981—),男,硕士,高级工程师,主要从事海洋测绘数据、浅地层剖面数据的处理与研究工作,E-mail:fanxiang510@163.com
