西南石油大学学报(自然科学版)

• 油气化学工程 • 上一篇    下一篇

稠油氧化阶段划分及活化能的确定

蒋海岩1,2 *,袁士宝1,2,李杨3,南叶飞4,王鹏5   

  1. 1. 西安石油大学石油工程学院,陕西西安710065
    2. 陕西省油气田特种增产技术重点实验室,陕西西安710065
    3. 中国石油塔里木油田分公司勘探开发研究院,新疆库尔勒841000
    4. 西安石油大学化学化工学院,陕西西安710065
    5. 中国石油塔里木油田分公司油气工程研究院,新疆库尔勒841000
  • 出版日期:2016-08-01 发布日期:2016-08-01
  • 通讯作者: 蒋海岩,E-mail:upcjhy@126.com
  • 基金资助:

    国家自然科学基金(51404199);陕西省自然科学基金(2016JM5031)

Division of Oxidation Stage of Heavy Oil in the Process of#br# in-situ Combustion

JIANG Haiyan1,2*, YUAN Shibao1,2, LI Yang3, NAN Yefei4, WANG Peng5   

  1. 1. School of Petroleum Engineering,Xi′ an Shiyou University,Xi′ an,Shaanxi 710065,China
    2. Provincial Key Laboratory of Advanced Stimulation Technology for Oil & Gas Reservoirs(SLAST),Xi′ an,Shaanxi 710065,China
    3. Research Institute of Exploration and Development,Tarim Oilfield Company,PetroChina,Korla,Xinjiang 841000,China
    4. School of Chemistry and Chemical Engineering,Xi′ an Shiyou University,Xi′ an,Shaanxi 710065,China
    5. Research Institute of Oil and Gas Engineering,Tarim Oilfield Company,PetroChina,Korla,Xinjiang 841000,China
  • Online:2016-08-01 Published:2016-08-01

摘要:

火驱是稠油蒸汽吞吐后的重要接替方法,而稠油氧化的反应阶段的划分对火驱点火乃至生产的调控影响重
大。采用热重实验对某油田稠油样品混合油砂氧化过程进行研究,绘制该稠油热失重速率曲线,呈多峰形态,结合稠
油多组分氧化理论进行氧化阶段的细致刻画,分解成低温氧化前期、低温氧化后期、燃料沉积段和高温氧化段共4 个
阶段,并明确定义了各阶段的分界点,与稠油常规认识的三阶段氧化规律相比,四阶段划分法更能刻画低温范围大、耗
时长,反应复杂的特点;用Flynn-Wall-Ozawa 法计算各阶段的反应活化能也与常规划分有较大区别。该认识对稠油火
烧油层点火阶段的热量供给具有的参考价值。

关键词: 稠油, 氧化反应, 热重, 活化能, 升温速率

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. Thermogravimetric(
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.

Key words: heavy oil, oxidation reaction, TG, activation energy, heating rate

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