Numerous sessile drop and micro-computed tomography (micro-CT) studies have been conducted to quantify geologic carbon storage formation wettability by measuring static contact angles ( θ ); however, the influence of pore geometry remains unknown. In this work, six sandstones (Bandera Brown, Berea, Bentheimer, Mt. Simon, Navajo, and Nugget) are used to measure θ using the two aforementioned experimental methods at identical testing conditions (45 °C and 12.41 MPa). The range of θ measured at in situ conditions (micro-CT) exceeds the range at ex situ (sessile drop method) conditions for all sandstones. However, when droplets with more representative in situ diameters are analyzed, θ averages show ex situ θ exceed those of in situ θ . Pore geometry does influence local θ , but the size of ex situ droplets relative to pore size appears to influence θ . This is important to consider for future sessile drop studies used for analysis of CO 2 behavior in carbon storage reservoirs.

中文翻译：

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使用来自六块砂岩的静滴和显微 CT 数据进行接触角测量

已经进行了大量的静滴和微型计算机断层扫描 (micro-CT) 研究，通过测量静态接触角 (θ) 来量化地质碳储存地层的润湿性；然而，孔隙几何形状的影响仍然未知。在这项工作中，六个砂岩（班德拉布朗、伯里亚、本特海默、西蒙山、纳瓦霍和金块）用于在相同的测试条件（45°C 和 12.41 MPa）下使用上述两种实验方法测量 θ。对于所有砂岩，在原位条件（微 CT）下测量的 θ 范围超过了非原位（座滴法）条件下的范围。然而，当分析具有更具代表性的原位直径的液滴时，θ 平均值显示非原位 θ 超过原位 θ 。孔隙几何形状确实影响局部 θ ，但是相对于孔径的非原位液滴的大小似乎会影响 θ 。这对于未来用于分析碳储存库中 CO 2 行为的固着滴研究很重要。