光谱学与光谱分析, 2020, 40 (6): 1736, 网络出版: 2020-12-07  

荧光光谱在单个油包裹体芳烃组分识别中的应用

Application of Fluorescence Spectroscopy in Identification of Aromatic Components in Single Oil Inclusions
作者单位
1 西安石油大学地球科学与工程学院, 陕西 西安 710065
2 陕西省油气成藏地质学重点实验室, 陕西 西安 710065
3 中国石油长庆油田分公司勘探部, 陕西 西安 710018
4 中国石油西南油气田分公司重庆气矿, 重庆 400021
摘要
为了明确油包裹体中芳烃组分与显微荧光光谱的关系, 基于石油的荧光性, 利用单个包裹体组分无损分析荧光光谱方法, 对松辽盆地齐家地区高台子储层油包裹体荧光光谱进行了定量化描述, 首先获取了储层油包裹体荧光颜色种类, 然后获得了单个油包裹体荧光光谱图, 并对比标准芳烃在365 nm单色光激发下的荧光光谱主峰波长特征值, 最终划分了油气充注幕次及不同幕次油包裹体芳烃组分类型。 结果表明: 储层见发黄色、 黄绿色、 蓝绿色3种荧光的油包裹体, 代表了不同成熟度油气充注。 油包裹体中芳烃组分主要有并四苯、 十环烯、 苯并菲, 其次含有胆蒽, 并含有少量的并五苯和红荧烯; 其中, 第1幕油包裹体芳烃组分是: 并五苯、 并四苯、 红荧烯、 十环烯; 第2幕油包裹体芳烃组分主要有并四苯、 十环烯、 苯并菲, 以及少量的红荧烯; 第3幕油包裹体芳烃组分主要有并四苯、 十环烯、 苯并菲, 其次是胆蒽。 从芳烃组分类型来看, 第1幕与第2、 第3幕油包裹体相比较, 大分子量芳烃含量多, 表现出低等成熟度; 第2、 第3幕油包裹体小分子芳烃类型多, 表现出中等成熟度。 储层油包裹体总体表现出小分子量芳烃少, 大分子量芳烃多, 说明原油被包裹体捕获前经历过生物降解和水洗作用, 捕获后经历过热侵变作用, 储层包裹体中原油主要以低成熟-中等成熟度原油为主。 最后拟定了油包裹体荧光光谱特征与芳烃组分关系, 为原油芳烃组分类型及成熟度研究提供了依据。
Abstract
In order to clarify the relationship between aromatic hydrocarbon components and micro-fluorescence spectra in oil inclusions, based on the fluorescence property of oil, the fluorescence spectra of oil inclusions in Gaotaizi reservoir in Qijia area of Songliao Basin were quantitatively described by non-destructive analysis of single inclusion components. Firstly, the fluorescence color types of oil inclusions in reservoirs were obtained, and then the fluorescence spectra of single oil inclusions were obtained. The main peak wavelength characteristic values of standard aromatics under 365 nm monochrome light excitation were compared. Finally, the hydrocarbon charging episodes and the types of aromatics in different episodes of oil inclusions were classified. The results show that there are three kinds of fluorescent oil inclusions: yellow, yellow-green and blue-green, which represent hydrocarbons charging with different maturity. The main aromatic components in oil inclusions are benzotetraphenyl, decacyclene and benzophenanthrene, followed by bilianthracene and a small amount of pentacene and red fluorene. Among them, the aromatic components in the first screen oil inclusion are pentacene, benzotetraphenyl, red fluorene and decacyclene; the aromatic components in the second screen oil inclusion are mainly benzotetrabenzene, decacyclene, benzophenanthrene and a small amount of red fluorene; and the third screen oil inclusion is benzophenanthrene. The main aromatic hydrocarbon components are benzotetraphenyl, decacyclene and benzophenanthrene, followed by bilianthracene. According to the types of aromatic hydrocarbon components, there are more high molecular weight aromatic hydrocarbons in Episode 1 than in Episode 2 and episode 3, showing lower maturity, while there are more types of small molecular aromatic hydrocarbons in Episode 2 and episode 3, showing medium maturity. Reservoir oil inclusions generally show fewer aromatics of small molecular weight and more aromatics of large molecular weight, which indicates that crude oil has undergone biodegradation and water washing before being captured by inclusions, and has undergone overheating and metamorphism after capturing. Crude oil in reservoir inclusions mainly consists of low-to medium-maturity crude oil. Finally, the relationship between the fluorescence spectrum characteristics of oil inclusions and the aromatics components is drawn up, which provides a basis for the study of the types and maturity of aromatics components in crude oil.

斯尚华, 赵靖舟, 邹国亮, 刘菲, 刘超, 闫冠宇. 荧光光谱在单个油包裹体芳烃组分识别中的应用[J]. 光谱学与光谱分析, 2020, 40(6): 1736. SI Shang-hua, ZHAO Jing-zhou, ZOU Guo-liang, LIU Fei, LIU Chao, YAN Guan-yu. Application of Fluorescence Spectroscopy in Identification of Aromatic Components in Single Oil Inclusions[J]. Spectroscopy and Spectral Analysis, 2020, 40(6): 1736.

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