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Roles of Flue Gas in Promoting Steam Flow and Heat Transfer in Multithermal Fluid Flooding

机译：烟气在促进多线粒液中蒸汽流量和热传递中的作用

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摘要

Multithermal fluid technology is becoming an important method in the field of heavy oil development. However, because of insufficient investigation on the heat transfer for the multithermal fluid, some development phenomena and characteristics still cannot be well explained. In order to determine the effect of flue gas on the thermal swept scope, multithermal fluid flooding experiments were carried out through 1D sandpack. The temperatures along the sandpack were measured. On this basis, steam heat transfer simulation experiments were conducted and the heat transfer coefficients were calculated. The mechanism of flue gas on steam heat transfer was analyzed. The results show that at the same heat injection conditions, the thermal swept scope for the multithermal fluid flooding was larger than that for the steam flooding. With the increase of flue gas proportion in the multithermal fluid, the heat transfer coefficient decreased and the condensation pattern was transformed from drop condensation to film condensation gradually. The flue gas can form gas film on the surface of the cold body and inhibit the heat transfer between steam and the cold body. Because of the inhibiting effect of flue gas on steam heat transfer, flue gas can reduce the heat transferred to the rock matrix in flooding and thus promote steam to carry more heat further. Meanwhile, flue gas can accelerate the flow of steam in porous media, which also leads to the expansion of the thermal swept scope for the multithermal fluid flooding.
机译：多线路流体技术正在成为大油开发领域的重要方法。然而，由于对多线粒流体的热传递的调查不足，一些发展现象和特性仍然无法很好地解释。为了确定烟道气对热扫描范围的影响，通过1D砂包进行多线粒流体泛洪实验。测量沿着砂包的温度。在此基础上，进行蒸汽传热模拟实验，并计算传热系数。分析了烟气对蒸汽热传递的机理。结果表明，在相同的热注入条件下，多线路流体洪水的热扫描范围大于蒸汽泛滥的范围。随着多线地流体中的烟道气比例的增加，传热系数降低，缩合图案从下降缩合逐渐转化为膜凝结。烟道气可以在冷体的表面上形成气体膜并抑制蒸汽和冷体之间的热传递。由于烟道气对蒸汽传热的抑制作用，烟道气可以将热量转移到岩石基质中的热量，从而促进蒸汽进一步携带更多热量。同时，烟道气可以加速多孔介质中的蒸汽流量，这也导致热扫描范围的膨胀，用于多线路流体泛滥。

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  • 来源
    《Mathematical Problems in Engineering》 |2019年第4期|4989375.1-4989375.8|共8页
  • 作者

    Wang Zhuangzhuang; Li Zhaomin;

  • 作者单位

    China Univ Petr East China Coll Petr Engn Qingdao 266580 Peoples R China;

    China Univ Petr East China Coll Petr Engn Qingdao 266580 Peoples R China;

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