王云飞,魏建光

• 1:东北石油大学石油工程学院
• 2:东北石油大学陆相页岩油气成藏及高效开发教育部重点实验室

摘要(Abstract)：

塔河北区块轻质原油与减氧空气在温度和压力作用下，探究其组分变化情况和耗氧量规律。在室内使用高温高压反应釜开展原油静态氧化实验，较为系统地研究不同含氧量及不同注气量的减氧空气对原油的氧化作用；并利用色谱分析对烃类分析，收集反应气体进行气体分析，气体组分和原油组分都有不同程度的变化。研究结果表明：(1)原油样本与减氧空气发生低温氧化反应，重质组分C_(21)以上的组分均下降，低于C_(13)的轻质组分含量均上升；(2)原油氧化效果随着含氧量上升而增强，反应过程组分对应“拐点”靠前；(3)含氧量一定时，改变油气比，反应对应的“拐点”不变；含氧量为下降趋势后趋于平缓；(4)低温氧化过程生成的CO_2含量为上升趋势后趋于平缓；(5)在油藏温度(160℃)下，原油主要涉及2个反应热裂解和加氧反应。热裂解反应与含氧量无关，和温度有关，主要反应温度是160～200℃。高碳组分沥青质等重质组分会分解成饱和烃。加氧反应主要是芳香烃，胶质加氧反应也会生成沥青质。当2种反应同时存在时，沥青质参与热裂解的含量大于加氧反应芳香烃等生成的沥青质量，会导致沥青质含量减少。

关键词(KeyWords)： 减氧空气;含氧量;低温氧化;轻质原油;组分变化

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金重点项目(51334007)

作者(Author): 王云飞,魏建光

DOI: 10.19509/j.cnki.dzkq.2022.0181

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