天然气中He丰度分析及应用

ANALYSIS AND APPLICATION OF He ABUNDANCE IN NATURAL GAS

陶成 孙明良 刘文汇 王晓峰

Tao Cheng Sun Mingliang Liu Wenhui Wang Xiaofeng

中国石油化工股份有限公司, 石油勘探开发研究院, 无锡石油地质研究所, 江苏, 无锡, 214151 2. 中国科学院, 兰州地质研究所, 兰州, 730000

Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214151, China 2. Lanzhou Institute of Geology, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China

自制天然气中稀有气体纯化富集装置,并与四极杆质谱计联机使用,用于天然气中4He丰度的分析。通过空气标准的反复多次分析,求得该分析系统4He的灵敏度;同时验证了该系统具有较好的重现性。与Mat271大型质谱仪进行天然气样品分析的数据比对,结果基本一致,误差小于10%。应用该方法分析了四川盆地普光和建南气田部分天然气样品,结果表明,天然气中放射性成因的4He丰度对天然气源岩时代和气藏形成的年代研究具有一定指示意义。

A rare gas purification and accumulation system is designed and used in analysis of 4He abundance in natural gas together with mass spectrograph.Sensitivity of 4He is calculated.The system is proved reproductive.Data from natural gas analysis are compared with those from Mat271 mass spectrograph,and deviation is less than 10%.Natural gas from the Puguang and Jiannan gas fields in the Sichuan Basin is analyzed,indicating that,studies of 4He abundance in natural gas is significant for age research of natural gas source rocks and accumulation formation.

国家自然科学基金项目(40673018)

https://doi.org/10.11781/sysydz200905528