On-line monitoring system for downhole temperature and pressure

被引：16

作者：

Ma Shou ^{[1
,2
]}

Guo Jianchun ^{[1
]}

Guo Yanli ^{[3
]}

Cao Jun ^{[3
]}

Zhang Boming ^{[3
]}

机构：

[1] Southwest Petr Univ, State Key Lab Oil & Gas Geol & Exploitat, Chengdu 637000, Peoples R China

[2] SINOPEC Shengli Oilfield Co, Dongying 257082, Peoples R China

[3] Beihang Univ, Mat Sci & Engn Sch, Beijing 100191, Peoples R China

来源：

OPTICAL ENGINEERING | 2014年 / 53卷 / 08期

关键词：

temperature; pressure; fiber Bragg grating; on-line monitoring; BRAGG GRATING SENSORS; OPTICAL-FIBER SENSORS; FBG SENSOR;

D O I：

10.1117/1.OE.53.8.087102

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

To overcome the downhole space limitation, eccentric tubing was designed. Two fiber Bragg grating (FBG) sensors written in one optical fiber were integrated into the specially designed tubing to form an on-line monitoring system, and a protective casing was designed to isolate the FBG sensors from the harsh environment. The wavelengths of the FBGs were recorded at certain temperatures and pressures in order to calibrate the temperature and pressure sensitivity, respectively. Both the temperature and the pressure exhibit good linear relationships with the wavelengths of the FBGs, which suggest that they can be represented as a function of the wavelength and generated via a data analysis system. The good linear relationships also proved that the sensing area was well sealed. The temperature was measured by the FBG sensor and a thermocouple at the same time, and good agreement was found between these results, validating the credibility of this system. (C) 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)

引用

页数：5

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