显微荧光光谱技术在油气成藏研究中的应用——以塔里木盆地巴什托上古生界油气藏为例  

Application of micro-beam of fluorescence spectra in study of hydrocarbon accumulation: taking the Late Paleozoic reservoir of Bashentuo in Tarim Basin for example

作　　者：孙守亮[1] 郭巍[2] 李永飞[1] 苏飞[1] 

机构地区：[1]中国地质调查局沈阳地质调查中心,沈阳110032 [2]吉林大学地球科学学院,长春130026

出　　处：《世界地质》2016年第1期173-183,共11页World Geology

基　　金：中石化西北分公司项目(SCK-JL(7.4)05-2008);中国地质调查局(1212011121085;1212010782001)联合资助

摘　　要：根据原油在紫外光的激发下产生荧光的特点,通过显微荧光光谱方法,对有机包裹体的荧光光谱进行定量化分析,利用其主峰波长与荧光强度、主峰波长与红/绿商的相关性,对塔里木盆地巴什托上古生界油气藏的成藏特征进行了初步研究。在研究区所采集的32块岩石样品中共获得64个荧光光谱数据。分析结果表明,巴什托上古生界油气藏存在3个油源,其主峰波长主要集中在439~443nm、469~472 nm和498~503 nm三个值段上,且为不同演化阶段的混源充注。前两者来自于寒武—奥陶系烃源岩,由下至上充注成藏;后一油源来自于石炭系巴楚组,随演化程度的变化同时向上、下两个方向充注。综合同期捕获不同主峰波长的有机包裹体,推测研究区至少存在4期油充注、1期天然气充注。As the oil can produce fluorescence under UV excitation,by microscopic fluorescence spectroscopic method,we quantitatively analyzed the fluorescence spectra of the organic inclusions. By using its contrast analysis of main peak wavelength and the fluorescence intensity,the main peak wavelength and Q-quotient（ redgreen quotient）,the characteristics of hydrocarbon reservoirs of Late Paleozoic reservoir in Bashentuo,Tarim Basin were preliminarily studied. We collected 64 fluorescence spectral data from 32 samples in the studied area. The analysis results show that there are three oil sources in the Late Paleozoic hydrocarbon reservoirs of Bashentuo,demonstrating the wavelengths are mainly concentrated on three value segments of 439 ~ 443 nm,469 ~ 472 nm and498 ~ 503 nm,which are mixed sources filling in different evolutionary stages. The precedent two reservoirs come from the Cambrian-Ordovician oil sources with filling up from the bottom up. The oil source in the later reservoircomes from Carboniferous Bachu Formation charging up and down both directions at the same time,along with the change of evolutionary degree. Integrating over the organic inclusions captured from different peak wavelengths at the same period,it can be speculated that there are four oil and one gas injection in the research area at least.

关 键 词：有机包裹体 显微荧光光谱 巴什托 上古生界油气藏 塔里木盆地 

分 类 号：P618.130[天文地球—矿床学]