西南石油大学学报（自然科学版）2016，Vol.38Issue(4)：136-142,7.DOI:10.11885/j.issn.1674-5086.2014.09.09.05
稠油氧化阶段划分及活化能的确定
Division of Oxidation Stage of Heavy Oil in the Process of in-situ Combustion
摘要
Abstract
In-situ combustion is an important replacement method for heavy oil steam stimulation. The division of the reaction stage of heavy oil oxidation has great influence on the ignition of in-situ combustion and even production. Thermogravi-metric(TG)experiment was conducted to study the oxidation process of a certain heavy oil sample mixed with quartz sand, and the oxidation process was described in detail by combining the multi-peak shape of thermal weight loss rate curve with Multi-component oxidation theory of heavy oil,and four stages of weight loss were identified:earlier LTO(low temperature oxidation),later LTO,fuel deposition and HTO(high temperature oxidation),and the demarcation points were clearly defined. Compared with the conventional understanding of the three stage oxidation of heavy oil,the four stage method is more capable of describing the characteristics of low temperature range,long time consuming and complex reaction. The Flynn-Wall-Ozawa method is used to calculate the activation energy of each stage,which is quite different from that of the conventional division. The results have reference value for heat supply in ignition period of in-situ combustion of heavy oil reservoir.关键词
稠油/氧化反应/热重/活化能/升温速率Key words
heavy oil/oxidation reaction/TG/activation energy/heating rate分类
能源科技引用本文复制引用
蒋海岩,袁士宝,李杨,南叶飞,王鹏..稠油氧化阶段划分及活化能的确定[J].西南石油大学学报（自然科学版）,2016,38(4):136-142,7.基金项目
国家自然科学基金（51404199）；陕西省自然科学基金（2016JM5031）。 （）
