Subsurface porous formations provide large capacities for underground hydrogen storage (UHS). Successful utilization of these porous reservoirs for UHS depends on accurate quantification of the hydrogen transport characteristics at continuum (macro) scale, specially in contact with other reservoir fluids. Relative-permeability and capillary-pressure curves are among the macro-scale transport characteristics which play crucial roles in quantification of the storage capacity and efficiency. For a given rock sample, these functions can be determined if pore-scale (micro-scale) surface properties, specially contact angles, are known. For hydrogen/brine/rock system, these properties are yet to a large extent unknown. In this study, we characterize the contact angles of hydrogen in contact with brine and Bentheimer and Berea sandstones at various pressure, temperature, and brine salinity using captive-bubble method. The experiments are conducted close to the in-situ conditions, which resulted in water-wet intrinsic contact angles, about 25 to 45 degrees. Moreover, no meaningful correlation was found with changing tested parameters. We monitor the bubbles over time and report the average contact angles with their minimum and maximum variations. Given rock pore structures, using the contact angles reported in this study, one can define relative-permeability and capillary-pressure functions for reservoir-scale simulations and storage optimization.

地下多孔地层为地下储氢 (UHS) 提供了大容量。将这些多孔储层成功用于 UHS 取决于在连续（宏观）尺度上准确量化氢传输特性，特别是与其他储层流体接触时。相对渗透率和毛细管压力曲线是宏观尺度传输特征之一，它们在存储容量和效率的量化中起着至关重要的作用。对于给定的岩石样品，如果已知孔隙尺度（微尺度）表面特性，特别是接触角，则可以确定这些函数。对于氢/盐水/岩石系统，这些特性在很大程度上是未知的。在这项研究中，我们使用俘获气泡法表征了在不同压力、温度和盐水盐度下，氢气与盐水以及 Bentheimer 和 Berea 砂岩接触的接触角。实验是在接近原位条件下进行的，这导致水湿固有接触角约为 25 到 45 度。此外，没有发现与改变测试参数的有意义的相关性。我们随时间监测气泡并报告平均接触角及其最小和最大变化。给定岩石孔隙结构，使用本研究中报告的接触角，可以定义相对渗透率和毛细管压力函数，用于储层规模模拟和存储优化。这导致水湿固有接触角，大约 25 到 45 度。此外，没有发现与改变测试参数的有意义的相关性。我们随时间监测气泡并报告平均接触角及其最小和最大变化。给定岩石孔隙结构，使用本研究中报告的接触角，可以定义相对渗透率和毛细管压力函数，用于储层规模模拟和存储优化。这导致水湿固有接触角，大约 25 到 45 度。此外，没有发现与改变测试参数的有意义的相关性。我们随时间监测气泡并报告平均接触角及其最小和最大变化。给定岩石孔隙结构，使用本研究中报告的接触角，可以定义相对渗透率和毛细管压力函数，用于储层规模模拟和存储优化。