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Viscosity of shale gas

机译:页岩气的粘度

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摘要

Nanofluidics, which analyzes fluid transport through sub 100-nm conduits, has fascinated engineers in different fields and we petroleum engineers are no exception. This field gained a significant interest in petroleum engineering only when hydrocarbon production from shales became economically feasible. The basic transport properties of the fluid change for this range of conduit size. With this in mind, we analyze the effective gas viscosity of a shale at different pore pressures. Our objective is not to derive detailed information about the gas transport at a pore or a sub-pore scale, but rather to discuss the implications of pore-scale simulations on the effective gas viscosity at the core scale. We use an acyclic pore model to account for the effective connectivity of the pore space at the core scale. The acyclic model is physically representative because it can capture capillary pressure measurements of the drainage obtained from mercury intrusion experiments. We present the effective gas viscosity with respect to the nominal value, under unconfined conditions. Our analysis shows that the reported permeability in a pressure-driven flow has to be considered an effective transport property if nominal viscosity and density are used for interpretation. That is, we have to modify viscosity and permeability simultaneously in our reservoir model. Our study has major implications for building a realistic reservoir model for shales based on petrophysical measurements. (C) 2016 Elsevier Ltd. All rights reserved.
机译:Nanofluidics分析通过100 nm以下管道的流体传输,吸引了不同领域的工程师,我们的石油工程师也不例外。仅当页岩油气生产在经济上可行时,该领域才对石油工程产生重大兴趣。在此管道尺寸范围内,流体的基本传输特性会发生变化。考虑到这一点,我们分析了不同孔隙压力下页岩的有效气体粘度。我们的目标不是获得有关孔隙或亚孔尺度下气体传输的详细信息,而是讨论孔隙尺度模拟对核心尺度有效气体粘度的影响。我们使用非循环孔隙模型来解释岩心尺度上孔隙空间的有效连通性。非循环模型在物理上具有代表性,因为它可以捕获从压汞实验获得的排水的毛细管压力测量值。我们提供了在无限制条件下相对于标称值的有效气体粘度。我们的分析表明,如果使用公称粘度和密度进行解释,则必须将所报告的在压力驱动流中的渗透率视为有效的运输属性。也就是说,我们必须在储层模型中同时修改粘度和渗透率。我们的研究对于基于岩石物理测量结果为页岩建立现实的储层模型具有重要意义。 (C)2016 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Fuel》 |2017年第1期|87-96|共10页
  • 作者

    Huy Tran; Sakhaee-Pour A.;

  • 作者单位

    Univ Oklahoma, Petr & Geol Engn, Norman, OK 73019 USA;

    Univ Oklahoma, Petr & Geol Engn, Norman, OK 73019 USA;

  • 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
  • 中图分类
  • 关键词

    Shale; Effective gas viscosity; Acyclic pore model;

    机译:页岩;有效气体粘度;无环孔隙模型;

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