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首页> 外文期刊>Mathematical Problems in Engineering >Simulation Study on Miscibility Effect of CO2/Solvent Injection for Enhanced Oil Recovery at Nonisothermal Conditions
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Simulation Study on Miscibility Effect of CO2/Solvent Injection for Enhanced Oil Recovery at Nonisothermal Conditions

机译：非等温条件下CO2 /溶剂注入的混溶效应提高采收率的模拟研究

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The minimum miscibility pressure (MMP) determines the main mechanism of CO2 flooding, which is either an immiscible or miscible process. This paper examines the recovery improvements of CO2 flooding in terms of both the injection temperature and solvent composition. The results show that a lower temperature injection and LPG (liquefied petroleum gas) mixture can considerably improve oil recovery due to the reduced MMP in the swept area caused by the injected solvent. For the pure CO2 injection at the reservoir temperature, oil recovery is 59% after 1.0 PV CO2 injection. The oil recoveries by CO2-LPG mixtures are improved to 73% with 0.1 mole fractions of LPG and 81% with 0.2 mole fractions of LPG. The recovery factor fromlow-temperature CO2 injection is 78%, which is 32% higher compared to the isothermal case. The recoveries obtained by low-temperature CO2-LPG injection increase up to 87% of the initial oil. Heat transfer between the reservoir and the formation of over/underburden should be considered in order to describe the processmore accurately. Additionally, the recovery factors from the heat transfer models are decreased by 4-12% in comparison with the original nonisothermal models.
机译：最小混溶压力（MMP）决定了CO2驱油的主要机制，该过程是不可混溶的或可混溶的过程。本文从注入温度和溶剂组成两方面考察了CO2驱油采收率的提高。结果表明，较低温度的注入和LPG（液化石油气）混合物可以显着提高采油率，这是由于注入的溶剂导致扫出区域的MMP降低。对于在储层温度下注入纯CO2，在注入1.0 PV CO2后，油的采收率为59％。通过使用CO2-LPG混合物的石油采收率，使用0.1摩尔份的LPG可以提高到73％，使用81摩尔份的LPG可以提高到81％。低温CO2注入的回收率是78％，比等温情况高32％。通过低温CO2-LPG注入获得的采收率最多可增加初始油的87％。为了更准确地描述该过程，应考虑储层和上覆/下伏地层之间的传热。此外，与原始非等温模型相比，传热模型的回收率降低了4-12％。

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  • 来源
    《Mathematical Problems in Engineering》 |2016年第2期|2562971.1-2562971.9|共9页
  • 作者

    Jeong Moon Sik; Lee Kun Sang;

  • 作者单位

    Hanyang Univ, Dept Nat Resources & Environm Engn, 222 Wangsimni Ro, Seoul 04763, South Korea;

    Hanyang Univ, Dept Nat Resources & Environm Engn, 222 Wangsimni Ro, Seoul 04763, South Korea;

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