OTDR型分布式光纤传感器在油气管道监测中的应用

摘要

Brillouin optical time domain analyzer BOTDA and distributed acoustic sensors DAS are two kinds of advanced OTDR-type distributed optical fiber sensors,which can achieve 50 to 100 kilometers measuring distance. The measuring principle and technical advantages of these two sensors were given. The application of oil and gas pipelines online leakage,the third-party damage and geological disasters monitoring based on the sensors as well as the successful application cases at home and aborad were desribed. The analysis and cases indicate that BOTDA and DAS can obtain multi-parameter measurements and multi-event positioning,thus ensuring long-distance oil and gas pipelines safe.%布里渊光时域分析仪BOTDA和分布式声音传感器DAS是2种测量距离可达50~100 km的先进OTDR型分布式光纤传感器，文中详细分析了它们的测量原理和技术优势，阐述了这2种传感器在油气管道泄漏、第三方破坏以及管道周边地质灾害在线监测应用的设计方案，并介绍了国内外成功应用案例。分析及应用案例表明：BOTDA和DAS可实现油气管线多参量分布式测量和多事件准确定位，将有效保障长输油气管道的运营安全。