论文标题
在低渗透性多孔介质中对非darcian流动的温度影响
Temperature effect on non-Darcian flow in low-permeability porous media
论文作者
论文摘要
在低渗透性多孔介质中，流体流的速度表现出非线性依赖对施加的压力梯度的依赖性。这种非darcian流动行为对核废料的地质处置，页岩中的碳氢化合物提取以及富含粘土的含水层中的流量和运输具有重要意义。已经假定温度会影响非darcian流动的阈值压力梯度。但是，支持数据非常有限。在这项研究中，我们首次报告在各种渗透率和温度下对阈值压力梯度进行系统的测量。结果表明，在相同的渗透性下，较高的温度导致阈值压力梯度较低，并且随着渗透率的增加，阈值压力梯度的降低速度更快。实验数据拟合到两个参数模型，以确定参数H0和A，该参数表征了界面流体 - 固体相互作用以及Darcy和非darcian Segimes之间的过渡。
In low-permeability porous media, the velocity of a fluid flow exhibits a nonlinear dependence on the imposed pressure gradient. This non-Darcian flow behavior has important implications to geological disposal of nuclear waste, hydrocarbon extraction from shale, and flow and transport in clay-rich aquifers. Temperature has been postulated to affect the threshold pressure gradient of a non-Darcian flow; however, the supporting data is very limited. In this study we for the first time report a systematic measurement of the threshold pressure gradient under various permeabilities and temperatures. The results show that a higher temperature leads to a lower threshold pressure gradient under the same permeability and a faster reduction of the threshold pressure gradient with increasing permeability. The experimental data are fitted to a two-parameter model to determine the parameters, h0 and a, which characterize the interfacial fluid-solid interactions and the transition between the Darcy and non-Darcian regimes.
