摘要
利用SeaSPY型高分辨率磁力探测系统在南海东部海域进行海底光缆调查,在荔湾3-1气田平台场址和管线路由光缆跨越点调查中,成功地找到了数条与预定管线路由跨越的海底光缆;在流花11-1E-1井场工程物探光缆调查中,也获得了井场附近海底光缆的准确可靠位置。如何有效控制磁力拖鱼离海底被调查目标的高度成为调查的关键,对此本文进行了深入的讨论,另外对SeaSPY磁力调查过程中的其它外部影响因素也进行了分析。通过对不同海区、不同目的、不同类型的海底光缆调查实践进行经验总结,掌握了在南海400 m水深范围内查找海底光缆的方法和技术特点,为以后在类似区域的光缆调查提供了参考和借鉴。
SeaSPY high resolution marine magnetometer is a good instrument applied to submarine cable（optical fiber cable,power cable,communication cable etc.） detection in eastern South China Sea.In the geophysical survey of Liwan3-1 oilfield platform site and submarine pipeline route crossing points,several submarine cables crossing with proposed pipeline route are found successfully.The location and status of another submarine cable,close to Liuhua11-1E-1 geophysical site survey area,are also detected accurately.This paper discusses deeply how to control the altitude effectively between the towfish of SeaSPY magnetometer and the intended target which is also the key point of the submarine cable detection survey.In addition,other external influencing factors during the SeaSPY magnetometer survey are also considered and analyzed.Through summarizing the successful investigation experiences obtained from different submarine cable detection,different objectives and varied survey area,this paper presents the survey methods and its technical features of submarine cable detection with water depth under 400m in eastern South China Sea,which provides a reference for the future submarine cable detection surveys in similar areas.
出处
《工程地球物理学报》
2010年第5期566-573,共8页
Chinese Journal of Engineering Geophysics
基金
国家科技专项(编号:2008ZX05056-002)资助
