石油学报 ›› 2013, Vol. 34 ›› Issue (6): 1125-1130.DOI: 10.7623/syxb201306011

• 油田开发 • 上一篇    下一篇

稠油火烧过程中的活化能测定方法

赵仁保1, 高珊珊1, 杨凤祥2, 黄容萍1, 陈怡秀1, 廖广志3   

  1. 1. 中国石油大学油气资源与探测国家重点实验室 北京 102249;
    2. 中国石油新疆油田公司 新疆克拉玛依 834000;
    3. 中国石油勘探与生产公司 北京 100007
  • 收稿日期:2013-05-31 修回日期:2013-08-22 出版日期:2013-11-25 发布日期:2013-10-13
  • 通讯作者: 赵仁保
  • 作者简介:赵仁保,男,1971年9月生,1994年获河南大学化学化工专业学士学位,2006年获中国石油大学(北京)油气田开发工程专业博士学位,现为中国石油大学(北京)副研究员,主要从事油气田开发及提高采收率研究。Email:zhaorenbao@vip.sina.com
  • 基金资助:

    国家重大科技专项(2011ZX05012-004)资助。

Determination method of activation energy during heavy-oil combustion

ZHAO Renbao1, GAO Shanshan1, YANG Fengxiang2, HUANG Rongping1, CHEN Yixiu1, LIAO Guangzhi3   

  1. 1. State Key Laboratory of Petroleum Resource & Prospecting, China University of Petroleum, Beijing 102249, China;
    2. PetroChina Xinjiang Oilfield Company, Karamay 834000, China;
    3. PetroChina Exploration & Production Company, Beijing 100007, China
  • Received:2013-05-31 Revised:2013-08-22 Online:2013-11-25 Published:2013-10-13

摘要:

利用克拉玛依风城稠油油田齐古组油藏的油砂样品,研究了活化能的测定方法,确定了燃烧池实验的基本步骤,并针对该油藏密闭油砂样-空气反应体系,通过实验测定了不同升温速率下反应温度和耗氧量随时间的变化,同时结合Friedman方法,计算了该反应体系的活化能。实验结果表明:油砂样在约200℃开始发生加氧反应,且随着加热速率的降低,初始反应温度、浓度峰值也逐渐降低;中、低温区(251~308℃)反应的活化能变化范围为170~215 kJ/mol,主要发生了加氧及裂解反应;高温区(346~398℃)反应的平均活化能为280 kJ/mol,主要为重组分及焦炭的燃烧;低温区和高温区之间存在一个波谷,由于稠油组分复杂,其与氧气的反应行为在反应过程中不断变化,因此反应机理有待于进一步研究。

关键词: 火烧油层, 稠油, 活化能, 指前因子, 等转化率法

Abstract:

Taking oil sand samples from the Qigu reservoir Fengcheng oilfield in Karamay as an example, this research discussed activation energy measurement and determined basic procedure of combustion cell experiment. Through a down-hole oil sand sample and air reaction system, reactive temperatures and oxygen consumption at different heating rate versus time could be measured. In addition, activation energy was calculated with the Friedman method. The results indicated that: oxygenation of oil sand samples occur around 200 ℃, and the initial reactive temperature and oxygen consumption hump decreased gradually with the decrease of heating rate; In the low-to-middle temperature region(251-300℃), the major reactions were oxygenation and cracking reaction with the activation energy ranging between 170-215 kJ/mol; In the high-temperature region (346-398 ℃), the average activation energy was 280 kJ/mol and the main reaction was combustion of heavy components and coke dominates; A dead valley could be formed between the low and the high temperature region, due to the complex components of heavy oils, the reaction behavior between heavy oils and air was varying constantly during combustion, thus the mechanism of reactions need further investigations.

Key words: in-situ combustion, heavy oil, activation energy, pre-exponent factor, isoconversion method

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