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该文通过三维砂箱可控模拟试验,结合胶体与表面化学相关理论,从介观尺度揭示了不同储能模式下引起含水介质黏粒重新分布的诱导机制,并探索了在复杂时空条件下咸水层空间结构的变化规律。试验结果表明,含水层渗透率不仅与回灌溶液温度、盐浓度的变化有关,而且含水介质渗透性与传热性变化规律在水平、垂直方向具有很强的空间非均质特征。在回灌混合低盐度溶液储热试验中,截至试验结束,500 mm-700 mm渗流单元上层相对渗透率降至53%,温度上升至45oC,下层相对渗透率最终降至48%,温度由15oC上升至42.9oC。
In this paper, three-dimensional sand box controllable simulation experiments, combined with the theory of colloid and surface chemistry, reveal the mechanism of inducing the redistribution of clay in different aqueous medium from mesoscopic scale and explore the mechanism of salinity Changes in the spatial structure of the water layer. The experimental results show that the permeability of aquifer is not only related to the temperature and concentration of recirculation solution, but also the variation of permeability and heat transfer of aqueous medium in the horizontal and vertical directions is very strong. In the heat storage mixed test of low salinity solution, the relative permeability in the upper layer of the 500 mm-700 mm seepage unit dropped to 53% at the end of the experiment, and the relative permeability in the lower layer eventually dropped to 48% 15oC up to 42.9oC.