浅析海底电缆地震采集作业二次定位系统  

Brief analysis of secondary positioning system in seismic sea-bottom cable acquisition

作　　者：曾湘轶[1] 杨文艳[2] 

机构地区：[1]中国海洋石油渤海公司勘探部 [2]天津轻工业学院

出　　处：《石油地球物理勘探》2001年第2期220-226,共7页Oil Geophysical Prospecting

摘　　要：当前，海底电缆地震技术在浅海和极浅海海域地震采集中显示出极大优越性。由于海底电缆地震采集的特殊性，因此在采集作业中得到精确的检波点位置特别重要，它直接关系到地震资料的质量。为得到精确的检波点位置，需对检波点进行二次定位。当前二次定位系统有声波定位系统和初至波定位系统。本文对这两种系统的原理和优缺点进行了详细分析和对比，并结合实例给监理和施工技术人员提出了在海底电缆地震采集过程中使用这两种二次定位系统时应注意的问题。Seismic sea-bottom cable technology has showed a great advantage to seismic acquisition in shallow or extreme shallow sea area. It is particular important to get the precise receiver position during sea-bottom cable acquisition as the job's particularity. It directly related with the quality of seismic data. It needs to conduct secondary positioning for receiver in order to get exact receiver position. There are acoustic positioning system and first break positioning system in current secondary positioning system. Analyzing, comparing the principle, advantages and disadvantages of these systems and combining real case, the paper proposed the problems needed to pay attention to when supervisors and field-technicians use these secondary positioning systems in process of seismic sea-bottom cable acquisition.

关 键 词：海底电缆 地震采集 二次定位系统 初至波定位 声波定位 海上地震勘探 

分 类 号：P631.46[天文地球—地质矿产勘探]