轻质和重质原油氧化特性及其动力学  

Oxidation behavior and kinetics of light oil and heavy oil

作　　者：袁成东[1] 蒲万芬[1] 郭正[2] 姚凯乐[3] 刘卓[2] 

机构地区：[1]西南石油大学油气藏地质与开发工程国家重点实验室,四川成都610500 [2]中国石油勘探开发研究院,北京100083 [3]辽河油田公司特种油开发公司,辽宁盘锦124010

出　　处：《化学工程》2014年第8期56-59,75,共5页Chemical Engineering(China)

基　　金：国家科技重大专项资助项目(2011ZX05049;2011ZX05049-04)

摘　　要：通过热重/微商热重-差热联用分析手段(TG/DTG-DTA)对比分析了一种轻质油和一种重质油的氧化特性和氧化动力学参数。实验结果表明:重质油和轻质油在常压空气流条件下的氧化反应都可以观察到3个明显的反应区间,分别为低温氧化反应(LTO),燃料沉积(FD)和高温氧化反应(HTO)。DTA曲线显示重质油在低温氧化(LTO)和高温氧化(HTO)反应区间的放热峰热流量均高于轻质油,且在高温氧化反应阶段(HTO)更明显。对比分析TG和DTG曲线发现,重质油开始发生快速热重损失及出现最高质量损失速率的温度均高于轻质油。采用Arrhenius方法和Ingraham-Marrier(I-M)方法计算的重质油的氧化反应活化能(LTO,26.19—26.45 kJ/mol和HTO,150.45—157.11 kJ/mol)均高于轻质油的活化能(LTO,12.33—13.75 kJ/mol和HTO,107.31—122.31 kJ/mol),表明轻质油更容易和氧气发生氧化反应。这表明,相比稠油油藏注空气,轻质油藏注空气技术更容易实现较好的驱油效果。The oxidation behavior and kinetics of light oil and heavy oil were investigated using thermogravimetry/differential thermogravimetry （TG/DTG）and differential thermal analysis （DTA）.The results indicate that for both light oil and heavy oil in oxidation with air,three distinct reaction regions are identified as low temperature oxidation （LTO）,fuel deposition （FD）and high temperature oxidation （HTO）.DTA curve shows that the heat flow of heavy oil in exothermic peaks （both LTO and HTO）is higher than that of light oil.And this phenomenon is more obvious in high temperature range.TG/DTG data exhibit that the temperatures where rapid mass loss begins and the greatest mass loss rate occurs are higher for heavy oil.Arrhenius method and Ingraham-Marrier method were employed to calculate the reaction activation energy.It reveals that the activation energy of heavy oil is higher than that of light oil.The activation energy of heavy oil for HTO and LTO is 150.45-157.1 1 kJ/mol and 26.19-26.45 kJ/mol,respectively,while the activation energy of light oil is 107.31-122.31 kJ/mol and 12.33-13.75 kJ/mol for HTO and LTO respectively.This indicates that light oil is easier to react with air,which means air injection into light oil reservoirs can achieve a better oil displacement efficiency,compared with heavy oil reservoirs.

关 键 词：轻质原油 重质原油 氧化特性 氧化动力学 

分 类 号：TE621[石油与天然气工程—油气加工工程]