摘要
对井下油管的压力和温度进行动态实时监测是保证井下安全生产的必要技术手段,然而传统电子类传感器在环境恶劣的井下易出现测量不准、失效等问题。普通单模光纤光栅灵敏度较低,且压力温度交叉敏感,而边孔光纤因为其双折射效应为解决井下压力温度同时测量提供了可能,但边孔光纤存在压力温度数据实时解析的问题。针对这些问题,提出了一种基于偏振系统的实时解调方案,并对该方案进行压力温度实验,实验结果显示最大温度绝对误差为0.73℃,最大压力绝对误差为0.97 MPa,可用于井下同时测量压力温度。
Real-time monitoring of downhole production dynamics is crucial in the petroleum industry,particularly for measuring tubing pressure and temperature.Traditional electronic sensors often fail in harsh environment,and ordinary single-mode fiber grating suffers from low sensitivity and cross-sensitivity issues.Side-hole optical fibers offer a solution due to their birefringence effect.This article proposes a real-time demodulation scheme based on a polarization system for pressure and temperature sensing.Experimental results show maximum absolute temperature and pressure errors of 0.73℃and 0.97 MPa,respectively,demonstrating the system’s efficacy.
作者
彭汉修
何祖清
梁磊
童晓玲
曹依盼
PENG Hanxiu;HE Zuqing;LIANG Lei;TONG Xiaoling;CAO Yipan(Petroleum Engineering Technology Research Institute of Sinopec Shengli Oilfield Company,Dongying 257000,China;National Engineering Laboratory for Fiber Optic Sensing Technology,Wuhan University of Technology,Wuhan 430070,China)
关键词
光纤光栅传感器
管道温度压力
边孔光纤
偏振分析解调
pipeline temperature and pressure
Fiber grating sensor
side-hole fiber
polarization analysis demodulation
