西南石油大学学报(自然科学版) ›› 2012, Vol. 34 ›› Issue (1): 97-102.

• 石油与天然气工程 • 上一篇    下一篇

火烧油层注气加热过程的模拟计算研究

潘竟军1,周杨平2,陈龙1,马远乐2   

  1. 1. 中国石油新疆油田公司采油工艺研究院,新疆克拉玛依834000;2. 清华大学核能与新能源技术研究院,北京海淀100084
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2012-02-01 发布日期:2012-02-01

Simulation of Gas Injection-Heating Process of In Situ Combustion

Pan Jingjun1, Zhou Yangping2, Chen Long1, Ma Yuanle2   

  1. 1. Research Institute of Oil Production Technology,Xinjiang Petroleum Corporation,CNPC,Karamay,Xinjiang 834000,China2. Institute of Nuclear and New Energy Technology,Tsinghua University,Haidian,Beijing 100084,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2012-02-01 Published:2012-02-01

摘要: 在火烧油层的注气加热过程中,需要根据点火需求优化注气参数。考虑了空气在井筒、油层的流动及换热过
程,包括空气进入油层的混合过程、水蒸发进入空气和湿空气降温后凝结为水的组分及相态变化、油层之间的导热过
程,建立了相应的瞬态模型,提出了基于龙格库塔法的求解方法。利用该模型及求解方法进行了模拟注气验证,并用
于油田的实际火烧油层点火过程的监测系统。研究表明:点火过程中加热带扩展速度非常有限(6 d 后加热带半径仍
小于0.6 m),并且受油层中含水率影响较大,加热带温度主要受电加热器功率和注气速度影响,受注气时间长短影响
较小。点火过程中应保持电加热器功率和注气速度稳定。

关键词: 火烧油层, 注气加热, 监测系统, 数学模型, 龙格库塔法

Abstract: It is necessary to optimize the parameters of gas injection heating during the gas injection-heating process in situ
combustion. A transient model is proposed to simulate the flow and the heat exchange of air in the well tube and oil reservoirs
including the mixing process of air and oil reservoirs,change of component and phase state such as evaporation of hot water
and condensation of cold wet air,the heat exchange among different oil reservoirs and rock. A solving method based on Rung-
Kutta and a simulation program is programmed. After the verification of simulating injection,this mathematical model and its
solving method are applied to the simulation and monitoring of gas injection heating process in situ combustion at actual oil
field. It was found that the extension of heating zone is slow (radius of heating zone is less than 0.6 m after a 5-day injection)
and greatly influenced by the moisture content of oil reservoir,and the temperature of it is almost constant and determined by
the power of electric heater and gas flow rate. The power of electric heater and gas flow rate should keep in a stable state during
the heating process.

Key words: in situ combustion, gas injection-heating, monitoring system, mathematical model, Rung-Kutta method

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