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Study on associated gas combustion characteristics and inert gas influence rules in air-foam flooding process

机译：空气泡沫爆炸过程中相关气体燃烧特性及惰性气体影响规则研究

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摘要

Air-foam flooding technology is a potential tertiary oil recovery technology. However, enhancing oil recovery through air injection still indicates risks of explosion. In this study, the upper and lower flammability limit (UFL and LFL) and limiting oxygen concentration (LOC) of the associated gas during air-foam flooding are investigated. The change rules of these combustion characteristics are tested under different initial pressures and temperatures using a high-pressure experimental device. The measurement results indicate that with the increase of initial temperature and pressure, the LFL and LOC decrease, whereas the UFL increases. The flammability limits of the associated gas measured at 15 MPa and 80 degrees C are ranging from 1.14% to 56.67%, far exceeding the calculated value under the room temperature and pressure. The empirical formula of the associated gas combustion performance is also fitted to immediately identify the risk levels of associated gases with similar components. The change in initial pressure and temperature only slightly affects the LOC when CO2 is the inert gas. By contrast, it greatly reduces the LOC when N2 is the inert gas. The maximum difference value of 2.55% between the LOC of the two inert gases is observed at 4 MPa and 80 degrees C. Overall, the findings of this study can serve as test data for the combustion limits and limiting oxygen content of associated gases in the process of air-foam flooding.
机译：气泡洪水技术是潜在的第三级采油技术。然而，通过空气喷射加强储油仍然表明爆炸的风险。在该研究中，研究了在空气泡沫泛洪期间相关气体的上部和下可燃性极限（UFL和LFL）和限制氧浓度（LOC）。使用高压实验装置在不同的初始压力和温度下测试这些燃烧特性的变化规则。测量结果表明，随着初始温度和压力的增加，LFL和LOC减小，而UFL增加。在15MPa和80℃下测量的相关气体的可燃性限制从1.14％到56.67％的范围远，远远超过室温和压力下的计算值。相关气体燃烧性能的经验配方也适用于立即识别具有类似组分的相关气体的风险水平。当CO2是惰性气体时，初始压力和温度的变化仅略微影响LOC。相比之下，当N2是惰性气体时，它大大减少了Loc。在4MPa和80摄氏度之间观察到两个惰性气体的LOM之间的最大差值2.55％。总体而言，该研究的结果可以作为燃烧限制的测试数据和限制相关气体的氧含量空气泡沫洪水的过程。

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  • 来源
    《Fuel》 |2021年第15期|121140.1-121140.10|共10页
  • 作者

    Fan Tao; Li Mingzhi; Liu Zhenyi; Zhao Yao; Ma Yunlong;

  • 作者单位

    Beijing Inst Technol State Key Lab Explos Sci & Technol Beijing Peoples R China;

    Beijing Inst Technol State Key Lab Explos Sci & Technol Beijing Peoples R China;

    Beijing Inst Technol State Key Lab Explos Sci & Technol Beijing Peoples R China;

    Beijing Inst Technol State Key Lab Explos Sci & Technol Beijing Peoples R China;

    Beijing Inst Technol State Key Lab Explos Sci & Technol Beijing Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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