Corrosion Resistant FBG-Based Quasi-Distributed Sensor for Crude Oil Tank Dynamic Temperature Profile Monitoring

Sensors

Rogério da Silva Marques⁴  Adilson Ribeiro Prado³  Paulo Fernando da Costa Antunes²  Paulo Sérgio de Brito André¹  Moisés R. N. Ribeiro³  Anselmo Frizera-Neto³  Maria José Pontes³ 

[1]Instituto de Telecomunicações and Department of Electrical and Computer Engineering, Superior Technical Institute , University of Lisbon, Av. Rovisco Pais, Lisbon 1049-001, Portugal

[2]Instituto de Telecomunicações, I3N and Physics Department, University of Aveiro, Campus Universitário de Santiago, Aveiro 3810-193, Portugal

[3]Federal University of Espírito Santo, Department of Electrical Engineering, Av. Fernando Ferrari, 514, Goiabeiras, Vitória 29075-910, Brazil

[4]Federal Institute of Espírito Santo, Av. Filogônio Peixoto 2220, Bairro Aviso, Linhares 29901-291, Brazil

关键词: FBG;    crude oil;    PTFE;    temperature;   

DOI  :  10.3390/s151229811

来源: mdpi

【 摘 要 】

This article presents a corrosion resistant, maneuverable, and intrinsically safe fiber Bragg grating (FBG)-based temperature optical sensor. Temperature monitoring is a critical activity for the oil and gas industry. It typically involves acquiring the desired parameters in a hazardous and corrosive environment. The use of polytetrafluoroethylene (PTFE) was proposed as a means of simultaneously isolating the optical fiber from the corrosive environment and avoiding undesirable mechanical tensions on the FBGs. The presented sensor head is based on multiple FBGs inscribed in a lengthy single mode fiber. The sensor presents an average thermal sensitivity of 8.82 ± 0.09 pm/°C, resulting in a typical temperature resolution of ~0.1 °C and an average time constant value of 6.25 ± 0.08 s. Corrosion and degradation resistance were verified by infrared spectroscopy and scanning electron microscopy during 90 days exposure to high salinity crude oil samples. The developed sensor was tested in a field pilot test, mimicking the operation of an inland crude tank, demonstrating its abilities to dynamically monitor temperature profile.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.