特种油气藏 ›› 2021, Vol. 28 ›› Issue (4): 96-101.DOI: 10.3969/j.issn.1006-6535.2021.04.013

• 油藏工程 • 上一篇    下一篇

火驱过程中稠油组分变化特征研究

蒋海岩1,2, 李天月1,2, 杜坤3, 袁士宝1,2, 张喻鹏4   

  1. 1.西安石油大学,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.中国石油长庆油田分公司,甘肃 庆城 745100;
    4.中国石油塔里木油田分公司,新疆 库尔勒 841000
  • 收稿日期:2020-07-23 修回日期:2021-05-27 发布日期:2022-02-18
  • 作者简介:蒋海岩(1978—),女,教授,2001年毕业于石油大学(华东)石油工程专业,2006年毕业于中国石油大学(华东)油气田开发工程专业,获博士学位,现从事提高采收率机理研究工作。
  • 基金资助:
    国家自然科学基金“基于燃料沉积演化机制的火烧油层启动与控制”(51674198)、“基于边界元方法的致密油藏体积压裂水平井多尺度、多机理耦合流动模型研究”(51804258);西安石油大学研究生创新与实践能力培养计划立项项目“火驱过程中稠油组分变化特征”(YCS20213140)

Study on the Characteristics of Changes in Heavy Oil Components during In-Situ Combustion

Jiang Haiyan1,2, Li Tianyue1,2, Du Kun3, Yuan Shibao1,2, Zhang Yupeng4   

  1. 1. Xi'an Shiyou University, Xi'an, Shaanxi 710065, China;
    2. Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil and Gas Reservoirs, Xi'an, Shaanxi 710065, China;
    3. PetroChina Changqing Oilfield Company, Qingcheng, Gansu 745100, China;
    4. PetroChina Tarim Oilfield Company, Korla, Xinjiang 841000, China
  • Received:2020-07-23 Revised:2021-05-27 Published:2022-02-18

摘要: 针对火驱过程中稠油组分变化复杂的问题,基于CMG-WinProp模块,研究火驱过程中不同区带间的稠油组分变化特征。研究结果表明:燃烧带主要发生高温氧化反应,重质组分裂解为轻质组分;结焦带轻质组分聚合生焦转变为重质组分;油墙区主要富集燃烧反应后的轻质油。相图变化表现为随着火驱燃烧反应的进行,油藏温度逐渐升高,气液两相区面积逐渐增大,随轻质组分含量的增多相图临界点向左上方移动。研究结果对进一步认识稠油热采过程中的组分变化规律具有十分重要的意义。

关键词: 火烧油层, 稠油热采, 组分迁移, 相态变化

Abstract: In view of the complicated changes in heavy oil components during in-situ combustion, the characteristics of changes in heavy oil components between different zones in the in-situ combustion were studied based on CMG-WinProp module. The results of the study showed that the heavy components were cracked into light components by high-temperature oxidation reaction in the combustion zone; the light components were polymerized and converted into heavy components in the coking zone; the light oil after combustion reaction was mainly accumulated in the oil bank zone. The change of the phase diagram showed that with the progress of in-situ combustion, the reservoir temperature was gradually increased, the gas-liquid area was gradually widened, and the critical point of phase diagram moved to the upper left with the increase of light component content. The study results are of great significance for further understanding the laws of component changes in the thermal recovery of heavy oil.

Key words: in-situ combustion, thermal recovery of heavy oil, component migration, phase change

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