|Table of Contents|

 Realtime Monitoring of Oilwell Dynamic Liquidlevel with Pressure
and Temperature Based on Optical Fiber Sensor
(PDF)

《哈尔滨理工大学学报》[ISSN:1007-2683/CN:23-1404/N]

Issue:
2018年06期
Page:
1-6
Research Field:
材料科学与工程
Publishing date:

Info

Title:
 Realtime Monitoring of Oilwell Dynamic Liquidlevel with Pressure
and Temperature Based on Optical Fiber Sensor
Author(s):
 ZHANG Hongtao12FU Wei3WANG Chunqian4ZHANG Guangyu1WANG Zhenlong1
 1.School of Mech. & Elec. Engineering, Harbin Institute of Technology, Harbin 150001, China; 
2.Postdoc Station of Mechanical Engineering, Harbin Institute of Technology, Harbin 150001, China; 
3.Well Testing and Perforating Service Subcompany of Daqing Oilfield, Daqing 163513, China; 
4.No.5 Oil Production Plant of Daqing Oilfield Company Ltd, Daqing 163513, China
Keywords:
 Keywords:optical fiber sensing fiber optic pressure sensor temperature profile eccentricpushrod realtime dynamic liquidlevel monitoring
PACS:
TN253
DOI:
10.15938/j.jhust.2018.06.001
Abstract:
 Abstract:Realtime monitoring of dynamic liquidlevel of oilwell is very important in oilfield. A novel method combining pressure measurement and temperature profile measurement is proposed in this paper to measure dynamic liquidlevel of oilwell in realtime. A fiber Bragg grating pressure sensor based on an eccentricpushrod structure is used to measure downhole pressure, and the multimode fiber is used to measure temperature profile. The initial position of the dynamic liquidlevel can be determined by the inflection point of the temperature profile. The density of the liquid in the well is calculated from the initial pressure and the initial position of dynamic liquidlevel. Base on this data, the realtime position of the dynamic liquidlevel can be obtained only by using the pressure data. Experimental results show that the method that the fiber Bragg grating sensor has a good linearity and repeatability, the sensitivity of the sensor can reach 230.9pm/MPa wich meets the requirements of downhole pressure measurement, and the inflection point of the temperature profile measured by multimode fiber is obvious and easy to read. The combination of the two measurements methods can be used for realtime and accurate monitoring of oil well liquid level data.

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Last Update: 2019-03-18