基于三维同步荧光光谱确定原油样品浓度的新方法

在对胜利油田原油样品进行不同浓度时的Δλ为40 nm的同步扫描荧光光谱的测量中，发现不同的浓度时的光谱不仅表现为峰高变化，峰位也有显著变化。综合整个光谱的峰高峰位等多因素，文章建立基于同步三维荧光光谱确定原油样品浓度的新方法，即采取二维三次卷积插值的方法获得连续的浓度三维荧光图谱，并与待测样品的同步光谱进行最小二乘法的谱线识别方法以确定其浓度，在10-4～1.0 g·L-1浓度范围内误差小于3％。与传统的石油荧光录井中所采用的二维发射荧光方法相比，文章提出的确定原油样品含油量的光谱方法的适用测量范围和测量精度均有大幅度的提高，可望在石油录井中得到应用。

A New Method for Concentration Determination of Crude Oil Sample Using Three-Dimensional Synchronous Fluorescence Spectra

In the spectral investigation of crude oil samples, it has been found that the synchronous fluorescence spectra (SFS) of the crude oil sample varied with the concentration in both the intensity and the location of peaks. Considering the information about both the changes in SFS, a new method for the concentration determination of crude oil sample using three-dimensional synchronous fluorescence was developed and introduced in the present paper. A number of samples have been investigated to verify the feasibility of the method. The concentration of each sample has been determined with a deviation under 3% in the concentration range from 10(-4) to 1.0 g x L(-1). All the results suggest that the newly developed method may become an useful means in petroleum logging.