稠油火烧油层高温氧化动力学参数计算与分析  

Calculation and analysis of kinetic parameters of heavy oil high temperature oxidation during in situ combustion

作　　者：张弦[1] 王海涛 车洪昌 ZHANG Xian;WANG Haitao;CHE Hongchang(Petroleum Engineering Institute,Northeast Petroleum University,Heilongjiang Daqing 163318,China;International Oil & Gas Development and Exploration Company,Daqing Oilfield,Heilongjiang Daqing 163000,China;Rumaila Project of PetroChina International Middle East,Beijing 100120,China)

机构地区：[1]东北石油大学石油工程学院,黑龙江大庆163318 [2]大庆油田国际勘探开发公司,黑龙江大庆163000 [3]中油国际(伊拉克)鲁迈拉公司,北京100120

出　　处：《非常规油气》2021年第4期36-42,92,共8页Unconventional Oil & Gas

基　　金：国家自然科学基金项目“稠油火驱过程中燃料沉积机制及其在多孔介质中的精细表征”(51904076);中国石油科技创新基金研究项目“烃类溶剂辅助火驱原位催化改质超稠油技术研究”(2018D-5007-0212)。

摘　　要：为了明确稠油在火烧油层高温氧化过程中的内在机理,应用热重、微商热重、差示扫描量热方法获取热分析基础数据,并应用Kissinger-Akahira-Sunose(KAS)等转化率法、Kissinger微分法和Coats-Redfern积分法进行高温氧化动力学参数分析。实验结果表明,应用KAS等转化率法、Kissinger微分法和Coats-Redfern积分法求取的稠油高温氧化反应动力学参数均在正常范围内,线性相关系数均在0.95以上。在高温反应阶段,油焦与氧气充分接触后燃烧以三维扩散为主。氧气浓度梯度是影响三维扩散的主要因素,由此生成的物质以三维矢量方式进行传递。KAS等转化率法和Coats-Redfern积分法计算的活化能值接近,而Kissinger微分法计算的活化能值略低,3种方法所计算的频率因子值比较接近。该研究成果对揭示火烧油层内在氧化机理具有一定的指导意义。In order to identify the oxidation mechanism of heavy oil during in situ combustion,thermogravimetric analysis,differentiate thermogravimetric analysis and differential scanning calorimeter were used to obtain the basic experimental data of the heavy oil oxidation,then KAS method,Kissinger method and Coats-Redfern method was employed respectively to determine the kinetic parameters.The experimental results showed that the kinetic parameters obtained by the three methods all fell into the reasonable range and the coefficient was more than 0.95.In the high temperature reaction stage,the combustion of oil tar after full contact with oxygen is dominated by 3D diffusion.Oxygen concentration gradient is the main factor affecting the 3D diffusion and the resulting material is transferred in a three-dimensional vector manner.The activation energy calculated by KAS was close to Coats-Redfern method,while the one by Kissinger method was lower.All frequent factors by these methods were close to each other.The results have instructive meanings to study the oxidation mechanism of the heavy oil during in situ combustion.

关 键 词：稠油 火烧油层 高温氧化 动力学参数 热重分析 

分 类 号：TE345[石油与天然气工程—油气田开发工程]