天然气井甲烷逸散激光遥测光学收发传输特性研究  

Research on the Optical Transceiver Transmission Characteristics of Fugitive Methane Laser Telemetry in Natural Gas Wells

作　　者：贾亚君 王明吉[1] 吕妍[1,3] 王迪[1,2,3] 李玉爽[1,3] 惠丽丽 周围[1,3] JIA Ya-jun;WANG Ming-ji;LV Yan;WANG Di;LI Yu-shuang;HUI Li-li;ZHOU Wei(School of Physics and Electronic Engineering,Northeast Petroleum University;School of Civil Engineering and Architecture,NortheastPetroleum University;International Joint Laboratory on Low-carbon and New-energy Nexus,NortheastPetroleum University;Technical Supervision Center of Daqing Oilfield)

机构地区：[1]东北石油大学物理与电子工程学院 [2]东北石油大学土木建筑工程学院 [3]东北石油大学低碳与新能源关系研究发展国际联合实验室 [4]大庆油田技术监督中心

出　　处：《化工自动化及仪表》2023年第6期769-777,共9页Control and Instruments in Chemical Industry

基　　金：东北石油大学科技成果产业化培育基金(批准号:15011210801)资助的课题。

摘　　要：为提升天然气井非合作目标条件下逸散甲烷激光遥测系统回波信号的接收效率,通过蒙特卡洛光线追迹分析非合作目标下甲烷遥测系统光学收发模块的光路传输特性,开展光学收发模块不同F数菲涅尔透镜聚光性能分析、激光收发光机结构(共轴、离轴)回波信号接收性能分析以及非合作目标下不同孔径菲涅尔透镜回波信号接收性能分析。研制基于波长调制浓度反演算法的甲烷逸散激光遥感测试装置,由浓度反演标定实验数据拟合得到2f/1f信号幅值与CH_(4)浓度间的线性关系(R^(2)=0.99244)。测试结果表明:甲烷激光遥测系统最小检测限(MDL)为3.81 ppm·m、平均时间456.2 s,证实系统具有较优性能与便捷性。For purpose of improving the echo signal reception efficiency of fugitive methane laser telemetry system with non-cooperative target conditions in natural gas wells,having Monte Carlo ray tracing adopted to analyze optical transmission characteristics of the optical transceiver module of the fugitive methane telemetry system with non-cooperative target was implemented,including concentrating performance analysis of different F-number Fresnel lenses of the optical transceiver module,the echo signal reception performance analysis of the structure(coaxial and off-axis)of the laser transceiver and the echo signal reception performance of Fresnel lenses with different apertures under non-cooperative targets.In addition,a methane fugitive laser telemetry test device based on wavelength modulation concentration inversion algorithm was developed,and the linear relationship between 2f/1f signal amplitude and methane concentration was obtained by fitting the concentration inversion calibration experimental data(R^(2)=0.99244).The test results show that,the minimum detection limit(MDL)of the methane telemetry system analyzed by Monte Carlo ray tracing is 3.81ppm·m and the average time is 456.2 s,and the experimental results verify the convenience and performance of the system.

关 键 词：波长调制浓度反演算法 甲烷遥测 天然气逸散 可调谐半导体吸收光谱 光路传输 激光 离轴结构 

分 类 号：TP751.2[自动化与计算机技术—检测技术与自动化装置] TH83[自动化与计算机技术—控制科学与工程]