Journal of Atmospheric and Environmental Optics, Volume. 3, Issue 3, 234(2008)
Application of Fiber Bragg Grating Sensor in Well Logging
A new type of pressure and temperature fiber Bragg grating(FBG) sensor used in oil wells is presented. The FBG sensing principle of detecting pressure and temperature is analyzed. On this basis, a sensor is designed to measure the parameters of pressure and temperature in oil wells. From the temperature and pressure test, the relationship between the pressure/temperature and the central wavelength of FBG is obtained, and the analytic expression of pressure-response sensitivity is found. The sensor can measure pressure and temperature at the same time. The experimental results show that the temperature sensitivity is 1.6357×10-5/℃ when the temperature ranges from 10℃ to 100℃, and the pressure sensitivity reaches to 1.245×10-4/MPa when the pressure ranges from 0 to 20 MPa. The sensor can meet the application in oil wells.
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YUAN Wei, JIANG Ming-shun, YANG Liu, SUI Qing-mei, CUI Hong-liang. Application of Fiber Bragg Grating Sensor in Well Logging[J]. Journal of Atmospheric and Environmental Optics, 2008, 3(3): 234