利用油包裹体荧光光谱多参数划分油气充注幕次——以塔里木盆地麦盖提斜坡巴什托构造带石炭系为例

作    者:斯尚华1,2, 陈红汉2, 袁丙龙3, 雷明珠3, 陈 杨3
单    位:(1 西安石油大学地球科学与工程学院; 2 中国地质大学(武汉)资源学院; 3 中海油湛江分公司)
基金项目:受国家“973”项目“塔里木盆地构造差异演化与下古生界油气成藏过程”等资助
摘    要:
以塔里木盆地麦盖提斜坡巴什托构造带石炭系油气成藏规律研究为例,通过实验检测,识别出石炭系储层中发育黄色、黄绿色、蓝绿色和蓝白色等4种荧光颜色的原油包裹体,从黄色到蓝白色,代表了油包裹体中充注油的成熟度逐渐增大;利用原油包裹体的荧光光谱计算出主峰波长λmax、红绿熵Q及QF535等属性参数,通过分析λmax与QF535相关关系所具有的4种特征,判定石炭系油气藏在地质历史时期经历了4幕油气充注;流体包裹体的均一温度特征,也反映出4幕不同热演化程度的原油充注。推断海西晚期是巴什托构造带石炭系重要的油气成藏期。
关键词:塔里木盆地; 麦盖提斜坡; 巴什托构造带; 石炭系; 原油包裹体; 荧光光谱; 红绿熵; 油气充注幕次

Identification of Hydrocarbon Charging Events by Using Fluorescence Spectrum Multiparameter of Oil Inclusions: A Case Study of Carboniferous in Bashituo Structural Belt of Markit Slope of Tarim Basin

Author's Name: Si Shanghua, Chen Honghan, Yuan Binglong, Lei Mingzhu, Chenyang
Institution: Petroleum University,Xi'an
Abstract:
Take the Carboniferous hydrocarbon accumulation of Bashituo structure belt of Markit slope in Tarim Basin as an example, it is identified four kinds of oil inclusions which developed in Carboniferous reservoir with different fluorescent color, from yellow, yellow-green to blue-green and blue-white. It is shown that the grade of maturity of oil charging in the oil inclusions is gradually increased. The property parameters of main peak wavelength λmax, red-green entropy Q and QF535 were calculated by using the fluorescence spectra of crude oil inclusions. Based on the characteristics of four different types of correlation relationship between λmax and QF535 , it is concluded that the Carboniferous reservoir has experienced four stages of hydrocarbon charging in the geological history, and it also reflected the four stages of oil charging with different thermal evolution according to the homogenization temperature of fluid inclusions. It is inferred that the late Hercynian is the important hydrocarbon accumulation stage in Bashituo structure belt.
Keywords: Carboniferous; Oil inclusion; Fluorescence spectra; Red-green entropy; Hydrocarbon charging event; Bashituo structural belt; Markit slope; Tarim Basin
投稿时间: 2017-06-07  
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