| 基于光纤传感的磁定位测井装置研制 |
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| 引用本文： | 侯倩,庞伟,吴梓楠,代志勇. 基于光纤传感的磁定位测井装置研制[J]. 测井技术, 2019, 43(3): 278-282 |
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| 作者姓名： | 侯倩 庞伟 吴梓楠 代志勇 |
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| 作者单位： | 中国石化石油工程技术研究院,北京,100101;电子科技大学光电科学与工程学院,四川成都,610054 |
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| 基金项目： | 国家科技重大专项;中国石化科技攻关计划重大项目 |
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| 摘 要： | 针对传统磁定位测井仪器受电磁干扰大、灵敏度不够高的难题,研制了一种基于光纤传感的磁定位测井装置。利用2只宽带啁啾光纤光栅间隔一定距离,构成全光纤F-P腔,封装于超磁致伸缩管内,并放置在同极相向的2块永磁铁之间,通过光纤F-P腔反射光谱信号分析,实现微弱的磁场变化测量。实验结果表明,该装置磁场测量相位灵敏度为1.57rad/μT,磁场平均测量误差为0.43μT,能对多种尺寸套管接箍进行定位测量,验证了其用于磁定位测井的可行性。
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| 关 键 词： | 测井装置 套管接箍 磁定位测井 光纤传感器 相位灵敏度 |
A Magnetic Locating Logging Tool Based on Optical Fiber Sensor |
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| HOU Qian,PANG Wei,WU Zinan,DAI Zhiyong. A Magnetic Locating Logging Tool Based on Optical Fiber Sensor[J]. Well Logging Technology, 2019, 43(3): 278-282 |
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| Authors: | HOU Qian PANG Wei WU Zinan DAI Zhiyong |
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| Affiliation: | (SINOPEC Research Institute of Petroleum Engineering,Beijing 100101,China;School of Opto-electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu,Sichuan 610054,China) |
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| Abstract: | A magnetic locating logging tool is introduced.Based on optical fiber sensors,it can reduce EMI and improve sensitivity that challenge a traditional magnetic locating logging tool.Two broadband chirped fiber Bragg gratings are separated from a certain distance to form a full optical fiber F-P cavity,encapsulated in a giant magnetostrictive tube,and placed between two permanent magnets of the same polar.The weak change of the magnetic field can be measured by analyzing the signal reflected by the optical fiber F-P cavity.Experiments show that the measured phase sensitivity is 1.57 rad/μT and the measurement error is 0.43μT.It can locate various sizes of casing collar,and it is feasible for magnetic locating logging. |
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| Keywords: | well logging equipment casing collar magnetic locating logging fiber optical sensor phase sensitivity |
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