This paper describes a comprehensive investigation to accurately determine the hydraulic permeability and the specific storage of a shale sample. One-dimensional pressure transient tests were conducted on a cylindrical sample under various levels of pore and confining pressures. For the boundary conditions, the upstream pressure was kept constant using a syringe pump, and the downstream storage was minimized for reducing the test duration. Both the downstream pressure and the upstream fluid flow into the sample were continuously recorded throughout the transient period. To estimate the hydraulic properties, the curve fitting technique was applied to the pressure and flow data using theoretical curves. We found that the pressure curve was sensitive to the ratio of hydraulic permeability to the specific storage (), but not sufficient to determine the individual components ( and ). The upstream flow curve was sensitive to the specific storage but less sensitive to the permeability. Based on our sensitivity analysis, we present a combination of two objective functions of flow and pressure data to optimize both hydraulic properties with reasonable uncertainty. An alternative is to first use the flow data to determine and then use pressure data with the predetermined to obtain the remaining .

中文翻译：

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整合瞬态压力和流量数据来确定页岩样品的水力渗透率和特定存储：实验测试和敏感性分析

本文描述了一项全面的研究，以准确确定页岩样品的水力渗透率和具体储存量。在不同水平的孔隙压力和围压下对圆柱形样品进行一维压力瞬变测试。对于边界条件，使用注射泵保持上游压力恒定，并最大限度地减少下游存储以减少测试持续时间。在整个瞬态期间连续记录下游压力和流入样品的上游流体。为了估计水力特性，使用理论曲线将曲线拟合技术应用于压力和流量数据。我们发现压力曲线对水力渗透率与特定储存量的比率敏感，但不足以确定各个组成部分（ 和 ）。上游流量曲线对比储存敏感，但对渗透率不太敏感。基于我们的敏感性分析，我们提出了流量和压力数据的两个目标函数的组合，以在合理的不确定性下优化这两种水力特性。另一种方法是首先使用流量数据来确定，然后使用预定的压力数据来获得剩余的。