激光拉曼光谱法测定天然气组成标准研究

进行了天然气组成分析-激光拉曼光谱法标准化研究，探讨了激光拉曼天然气组成分析方法标准化的可行性。采用激光拉曼光谱进行天然气组成分析，无需将天然气中各组分分离便可实现多组分同步检测，减少分析时长，提高测量的实时性，实现快速分析，通过国内外激光拉曼天然气分析方法和标准的研究和实验，掌握了国内外激光拉曼天然气分析方法技术现状及发展方向，积累了激光拉曼天然气分析试验数据，结果表明激光拉曼天然气分析具有可快速检测(10 s)、连续记录和操作简单的优点，适用于天然气录井、井站、集气站原料气气质分析和天然气净化处理中过程控制中实时快速获取气质数据，建议制定激光拉曼光谱天然气分析方法标准，测量组分为CO₂，N₂，H₂S，CH₄，C₂H₆，C₃H₈，测量范围分别为：CH₄：75%~99.9%，C₂H₆：0.005%~20%，C₃H₈：0.005%~10%，H₂S：0.001 5%~10%，N₂：0.02%~10%，CO₂：0.01%~10%(上述浓度均为摩尔分数)，为上游领域天然气勘探开发及过程控制服务。

Study on Standardization of Natural Gas Composition Analysis by Laser Raman Spectroscopy

In this paper, the standardization of natural gas composition analysis by Laser Raman Spectroscopy was studied, and the feasibility of Standardization was discussed. When using Laser Raman spectroscopy, multiple components can be measured simultaneously without separating every component, so it can save analyzing time, improve real-time effect and realize fast analysis. In addition, the technical status and developing trend for natural gas analytical method by Laser Raman through domestic and international standardized investigation were studied, and data of natural gas analysis experiments by Laser Raman were accumulated. The results show that Laser Raman spectrum will be a powerful tool for real time rapid access to gas quality data in natural gas logging, wells station, gas quality analysis of gas gathering station and natural gas purification process control due to the advantages of fast test (10 seconds), continuous record as well as simple operation. It is suggested to work on standards of natural gas analysis method by Laser-Raman to test CO₂, N₂, H₂S, CH₄, C₂H₆ and C₃H₈, and the testing ranges are CH₄ is from 75% to 99.9%, C₂H₆ 0.005%～20%, C₃H₈ 0.005%～10%, H₂S 0.001 5%～10%, N₂ 0.02%～10% and CO₂ from 0.01% to 10%(mole fractions), offering service in the upstream area for natural gas composition monitoring to improve exploration and development.