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首页> 外文会议>Thirtieth workshop on geothermal reservoir engineering >MULTIPHASE FLOW PROPERTIES OF FRACTURED GEOTHERMAL ROCKS
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MULTIPHASE FLOW PROPERTIES OF FRACTURED GEOTHERMAL ROCKS

机译：裂隙地热岩石的多相流特性

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摘要

The understanding of the properties of two-phase flowrnin fractured rocks is central to the prediction ofrngeothermal reservoir performance. In this study, wernsuggest an alternative approach to describe the twophasernrelative permeability behavior in rough-walledrnfractures based on the two-phase flow structures. Thisrnapproach lumps the microscale physical mechanismrn(viscous and capillary forces) into an apparentrnobservable parameter, channel tortuosity, which wasrnfound to dominate the reduction of the relativernpermeabilities from the values that would be expectedrnbased on the X-curve. Three artificial fractures, smoothwalled,rnhomogeneously rough-walled and randomlyrnrough-walled fractures, were studied to represent distinctrnsurface geometry and heterogeneity. The experimentalrnresults from these three fractures could be describedrnsuccessfully by the proposed model. Furthermore, wernfound that the magnitude of the channel tortuosityrnincreases when the heterogeneity of the fracture surfacernincreases. Although only three simplified fractures werernstudied and the relationship between the flow-basedrnheterogeneity and the channel tortuosity is not fullyrndeveloped yet, we were able to derive an empirical,rntortuous channel model generalized from all channelrntortuosities from these three fractures. This model canrnrepresent the current experimental data and as well asrnobservations from earlier studies with good agreement.
机译：理解裂隙岩中两相流的性质对预测地热储层的性能至关重要。在这项研究中，我们建议使用一种替代方法来描述基于两相流结构的粗糙壁裂缝中的两相相对渗透率行为。这种方法将微观物理机制（粘滞力和毛细作用力）归纳为一个明显的可观测参数，即通道曲折度，该参数主导了相对渗透率从基于X曲线的预期值的降低。研究了三种人工裂缝，分别为光滑壁，均质粗糙壁和随机粗糙壁裂缝，以代表不同的表面几何形状和非均质性。所提出的模型可以成功地描述这三处裂缝的实验结果。此外，我们发现，当裂缝表面的非均质性增加时，通道曲折度会增加。尽管仅研究了三个简化的裂缝，并且基于流动的非均质性与通道曲折度之间的关系尚未得到充分发展，但我们能够从这三个裂缝的所有通道曲率中得出经验丰富的曲折通道模型。该模型可以很好地表示当前的实验数据和早期研究的图像。

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  • 会议地点 Stanford CA(US)
  • 作者

    Chih-Ying Chen; Roland N. Horne;

  • 作者单位

    Stanford Geothermal Program, Stanford University, Stanford, California 94305, USA alnchen@stanford.edu;

    Stanford Geothermal Program, Stanford University, Stanford, California 94305, USA horne@stanford.edu;

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  • 正文语种 eng
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