用于油井温度剖面快速测量的高精度光纤光栅温度传感器设计

doi:10.3976/j.issn.1002-4026.2018.03.009

SHANDONG SCIENCE ›› 2018, Vol. 31 ›› Issue (3): 55-60.doi: 10.3976/j.issn.1002-4026.2018.03.009

• Optical Fiber and Photonic sensingtechnology • Previous Articles Next Articles

Design of high precision fiber Bragg grating temperature sensor for rapid measurement of oil well temperature profile

LI San-xi 1 , MA Long 2*, LÜ Jing-sheng 2 , ZHANG Fa-xiang 2 , LIU Xiao-hui 2, ZHAO Qing-chao 2 ,LI Hui 2 , WANG Chang 2

1. CNOOC (China) Co., Ltd., Shanghai 200030, China;2 Laser Institute of Shandong Academy of Sciences,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250014,China

Received:2017-11-02 Online:2018-06-20 Published:2018-06-20

Abstract

Abstract:

Aiming at the high precision and rapid measurement of the downhole temperature profile, a new kind of walking highprecision fiber grating temperature sensor was designed in this paper. The ultrafine stainless steel tube was used for pressure encapsulation. The theoretical simulation of the temperature response speed was carried out, and the impact of the downhole high pressure on the measurement accuracy was analyzed. The sensor with a diameter of 1.2 mm was demodulated by commercial highprecision demodulator. The results show that the resolution of the FBG temperature sensor is better than 0.01 ^oC, the linear range of the temperature reaches 175 ^oC, the response time is less than 108 ms, and the resistance to pressure is up to 100 MPa. This sensor can meet the needs of rapid measurement of the oil well temperature profile.

Key words: oilfield temperature measurement, temperature profile, rapid measurement, fiber grating

CLC Number:

TE132

LI San-xi,MA Long, Lü Jing-sheng,ZHANG Fa-xiang,LIU Xiao-hui, ZHAO Qing-chao,LI Hui,WANG Chang . Design of high precision fiber Bragg grating temperature sensor for rapid measurement of oil well temperature profile[J].SHANDONG SCIENCE, 2018, 31(3): 55-60.

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Design of high precision fiber Bragg grating temperature sensor for rapid measurement of oil well temperature profile

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