目前光纤在油气工业的应用越来越广泛,尤其是在油藏永久性监测方面,如分布式温度传感器和光纤压力传感器。然而,光纤的工作寿命较短,尤其是在高温环境中其工作寿命更短。这个问题在蒸汽辅助重力驱(SAGD)的条件下就更为关键,在SAGD过程中油井经常要在250℃的极高温环境中生产,而且周围环境氢气富集,压力也很高。常规光纤的性能在此环境中将受到很大影响。本文提供了一种新型的可以在高温高压且氢富集的环境下长期服务的光纤,现场应用表明该种光纤可连续工作达20个月。 At present, the application of optical fiber in the oil and gas industry is more and more widespread, especially in the permanent monitoring of reservoirs, such as distributed temperature sensors and optical fiber pressure sensors. However, the working life of optical fiber is short, especially in high temperature environment, its working life is shorter. This problem is even more critical under steam-assisted gravity-driven (SAGD) conditions in which wells are often produced at very high temperatures of 250 ° C and the hydrogen in the surrounding environment is enriched and under high pressure. The performance of conventional optical fibers in this environment will be greatly affected. This article provides a new type of fiber that can be serviced long-term under high temperature and pressure and hydrogen-rich conditions. Field applications show that the fiber can work continuously for up to 20 months.