摘要
通过对甲烷和其他烃组分在近红外、中红外吸收光谱的分析，提出甲垸的光谱吸收峰在波长为1．6～1．7μm之间时不受钻井液中其他烃组分及水的干扰，可用于定量分析；通过分析适于近红外光谱检测的光源和检测器，提出以激光二极管光源、红外光子检测器的组合方式用于甲炕的在线检测。对光纤探头和直接浸入两种原位测量方法进行了探讨，分析了两种方法的优缺点以及影响测量因素。结果表明，基于甲烷在近红外光谱中吸收峰与其他烃组分的差别和近红外技术的成熟，实现甲烷分析仪的传感器化在线测量是可行的，并认为应对甲烷在钻井液中的在线实时测量开展进一步的实验测试。
Through making analyses on methane and the other hydrocarbon components in near-infrared and mid-infrared absorption spectrum,the paper put forward that methane spectrum absorption peak in 1.6~1.7μm is not disturbed by other hydrocarbons and water in the drilling fluid,which can be used in the quantitative analyses.By analyzing light source and detecting devices which are suitable for near-infrared spectrum detection,the paper advanced to combine laser diode photo source with infrared photon detector to on-line detect methane.The paper discussed two in-situ measurement methods of fiber optic probe and direct immersion,and analyzed their merits and demerits and the factors influencing measurement.The results indicated that it is feasible to realize methane analyses with sensors based on the differences between methane absorption peak and other hydrocarbon components′ in near-infrared spectrum and the maturity of near-infrared technique,and the further experimental tests should be carried out to on-line real-time methane measurement in drilling fluid.
出处
《录井工程》
2011年第3期47-50,69,共5页
Mud Logging Engineering
关键词
近红外
甲烷
在线检测
吸收光谱
方法
near-infrared,methane,on-line detection,absorption spectrum,method
