小型气体质谱仪在中国大陆科学钻探钻井现场泥浆中气体的在线分析应用

Application of Miniature Gas Mass Spectrometer in On-line Analysis of Gases in Onsite Chinese Continental Scientific Drilling Mud

摘要: 采用OmniStar型质谱仪在线分析CCSD钻井泥浆中的H2、He、O2、N2、Ar、CH4和CO2等气体组分.采用脱气器、大气平衡仪、气体流量剂、冷冻干燥等样品采集装置,通过合理的设计可以有效地采集到井下气体并且克服大气的污染,除去气体中的水分.根据OmniStar型质谱仪的分析原理及分析能力,建立了可靠的分析方法,其精密度优于2%,准确度高,分析周期为8 s,为科学研究提供了及时、可靠的数据.

Abstract: H2, He, O2, N2, Ar, CH4 and CO2 in the Chinese Continental Scientific Drilling (CCSD) mud samples were on line analyzed by OmniStar gas mass spectrometer. The sampling equipment was properly designed and applied to the collection of the gases from the drilling hole to avoid the air pollution and remove the moisture in the drilling gases. The reliable analysis method was established with precision of less than 2%RSD (n=30) and high accuracy. And a great deal of credible data has been acquired for the scientific research in CCSD.