热重分析仪求取稠油高温氧化动力学参数

doi:10.7623/syxb201304020

石油学报 ›› 2013, Vol. 34 ›› Issue (4): 775-779.DOI: 10.7623/syxb201304020

热重分析仪求取稠油高温氧化动力学参数

唐君实, 关文龙, 梁金中, 江航, 王伯军

中国石油勘探开发研究院提高石油采收率国家重点实验室北京 100083

收稿日期:2013-01-05 修回日期:2013-03-21 出版日期:2013-07-25 发布日期:2013-07-04
通讯作者: 唐君实
作者简介:唐君实,男,1984年10月生,2006年毕业于清华大学,2011年获清华大学博士学位,现为中国石油勘探开发研究院热力采油研究所工程师,主要从事注空气开发技术研究。Email:tjsh@petrochina.com.cn
基金资助:
国家重大科技专项 "火烧驱油技术研究与应用"(2011ZX05012-002)资助。

Determination on high-temperature oxidation kinetic parameters of heavy oils with thermogravimetric analyzer

TANG Junshi, GUAN Wenlong, LIANG Jinzhong, JIANG Hang, WANG Bojun

State Key Laboratory of Enhanced Oil Recovery, PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China

Received:2013-01-05 Revised:2013-03-21 Online:2013-07-25 Published:2013-07-04

摘要/Abstract

摘要：

采用火烧油层技术开发稠油时,高温氧化反应是火烧前缘的主要反应类型和能量源。采用热重法对稠油高温氧化过程进行研究,评价了样品制备方法(纯油样或混合SiO₂)和动力学参数求取方法(Coats-Redfern积分法、ABSW微分法和FWO等转化率法)对动力学参数测试结果的影响。研究结果表明,油样混合SiO₂后,颗粒间的孔隙可以为氧气扩散提供通道,使样品均匀反应,实现有效动力学实验,克服了纯油样不易均匀燃烧的问题;通过热重曲线求取稠油高温氧化动力学参数时,单一扫描速率法(Coats-Redfern积分法和ABSW微分法)拟合动力学数据存在一定偏差,而FWO等转化率法避免了因简化和假设机理函数所带来的误差,可用于油焦燃烧本征动力学研究,为火烧油层开发稠油、超稠油和特稠油提供准确动力学参数。

关键词: 火烧油层, 稠油, 高温氧化, 动力学参数, 热重

Abstract:

High temperature oxidation is the main reaction type and energy source of the combustion front during in-situ combustion development of heavy oils. High temperature oxidation of heavy oils was studied by thermogravimetry, and influences of sample preparation methods (pure oils or oils mixed with SiO₂) and kinetic parameter determination methods (Coats-Redfern integration, ABSW differentiation and FWO iso-conversion) on measured results of kinetic parameters were evaluated. The results showed that the combustion of pure oil samples is uneven, while for oils mixed with SiO₂, pore spaces among SiO₂ particles can provide O₂ with diffusion channels, resulting in an even reaction in combustion. Therefore, the kinetic analysis experiment is effective due to the even combustion of samples. When kinetic parameters for high temperature oxidation of heavy oils are derived from thermogravimetric curves, there exist certain errors in kinetic parameters fitted by a single scanning-rate method (Coats-Redfern integration and ABSW differentiation). Whereas FWO iso-conversional method can avoid errors derived from simplified hypothetic mechanism functions, thus the method, capable of being applied to intrinsic kinetics researches of oil-coke combustion, can provide accurate kinetic parameters for the in-situ combustion development of heavy, ultra-heavy and extra-heavy oils.

Key words: in-situ combustion, heavy oil, high-temperature oxidation, kinetic parameters, thermogravimetry

中图分类号:

TE345

唐君实, 关文龙, 梁金中, 江航, 王伯军. 热重分析仪求取稠油高温氧化动力学参数[J]. 石油学报, 2013, 34(4): 775-779.

TANG Junshi, GUAN Wenlong, LIANG Jinzhong, JIANG Hang, WANG Bojun. Determination on high-temperature oxidation kinetic parameters of heavy oils with thermogravimetric analyzer[J]. Editorial office of ACTA PETROLEI SINICA, 2013, 34(4): 775-779.

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热重分析仪求取稠油高温氧化动力学参数

Determination on high-temperature oxidation kinetic parameters of heavy oils with thermogravimetric analyzer

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