油气包裹体的显微红外光谱测试技术及应用

单一油气包裹体的成分一直是地质学家关注的焦点,它能为油气成藏研究提供最直接的证据。显微红外光谱技术可以测定单个油气包裹体的成分、分子结构和其中油气包裹体的成熟度。本文应用显微红外光谱技术、包裹体的鉴定和均一温度测定技术,分析了大庆探区海拉尔盆地乌27井、巴16井、希3井等样品的包裹体。研究表明,乌27井有过两期成藏,并以第二期为主;巴16井也有过两期主要成藏,且第二期具混源的特点;希3井只有一次主要成藏期。同时利用红外光谱的CH2/CH3值、Xinc、Xstd划分了三口井的油气成藏期次,结果与镜下鉴定结论相一致,并确定了其中油气包裹体的成熟度。本文还探讨了显微-红外光谱测试单一油气包裹体的发展方向。

The Analytical Technique of the Micro infrared Spectra of the Hydrocarbon Inclusions and its Application

The analytical technique of the infrared spectrometry can be used to detect the components of individual inclusion,molecule texture and saturation of hydrocarbon in inclusions.The technique of infrared spectrometry,inclusion petrography and microthermometry are applied to study the fluid inclusions in samples collected from the Well Wu 27,Well Ba 16,and Well Xi 3 in the Hailaer basin.The parameters of CH_2/CH_3,X_(inc),X_(std) of the infrared spectra are used to classify the reservoir-forming stages and to detect the saturation of hydrocarbon in inclusions.This paper also discussed the possible future development of the microinfrared technique on detecting individual hydrocarbon inclusions.