含油岩心显微荧光成像光谱研究

发展了一种显微荧光光谱成像技术，并将其应用于天然岩心进行显微荧光成像光谱研究。利用这种技术同时采集含油岩心表面的荧光光谱信息和空间信息．并对获得的光谱图像给予光谱学和地质学解释。结果表明，不但能显示岩心形貌和组分的大致趋势，而且能揭示其精细细节．为石油地质研究提供了一种新方法，为今后的石油勘探开发工作提供了一种先进的指导手段。

Micrscopic Fluorescence Imaging Spectra of Oily Core

We have found a use for an small size microscopic fluorescence imaging spectroscopy to the identification of petroleum species. This instrumentation consists of microscope, variable interference filter, micro-motion stage, CCD camera, picture acquisition card and computer. The interference filter scans across every pixel of CCD array. The different column pixel in the picture which we get at every step is monocolour partial image under different wavelength, with the step by step, these column monocolour pixels change the wavelength. And finally we cut off and reassembled these images and get the whole monocolour images with different wavelength. The interval of sweep step length decided by the required spectral resolution and the required wavelength interval of different pictures. The limiting spectral resolution was controlled by bandwidth of the variable interference filter. The spatial resolution of the instrument decided ultimately by the CCD, filter and imaging objective. This microscopic imaging fluorescence spectrometer has some excellent characters such as compact structure, higher spatial resolution and spectral resolution, higher scan rate and so on. The microscopic morphologies of some oil core sections were observed. According to three dimension fluores- cence spectra features data of some crude oil, we have selected proper excitation wavelengths and emission wave- lengths to distinguish different fluorescence from inorganic mineral and organic hydrocarbons. The high spatial con- trast distribution picture of crude oil was obtained.