In Situ Quantification of Colloidal Kaolinite Transport and Attachment in Porous Media Using Positron Emission Tomography

IF 2.7 3区工程技术 Q3 ENGINEERING, CHEMICAL

Transport in Porous Media Pub Date : 2024-05-31 DOI:10.1007/s11242-024-02093-w

Collin Sutton, Christopher Zahasky

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引用次数: 0

Abstract

Migration of variably sized fines or geogenic colloids is a significant concern for the long-term efficiency of aquifer management and reservoir injection and extraction operations. Characterizing the migration of colloids in porous media has been widely studied; however, few studies have quantified sub-core colloidal transport behavior and related this to bulk sample observations under transient conditions. In this study, the transport of colloidal kaolinite through sand packs is analyzed using UV–Vis spectrophotometry and positron emission tomography (PET). PET imaging was completed by imaging an aqueous pulse of suspended radiolabeled kaolinite under single-phase flow conditions. The experimental PET imaging approach allows for the accurate 4-D quantification of changes in colloidal kaolinite transport, attachment, and detachment properties at the sub-centimeter scale. This study provides a novel approach for the quantification of inorganic colloid transport in geologic porous media, providing a foundation for future work to be done on more complex and heterogeneous systems under transient flow and fluid chemistry conditions.

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利用正电子发射断层扫描对多孔介质中胶体高岭石的迁移和附着进行原位定量

大小不一的细粒或地质胶体的迁移是含水层管理和储层注采作业长期效率的一个重要问题。对胶体在多孔介质中的迁移特征进行了广泛的研究，但很少有研究对亚岩心胶体迁移行为进行量化，并将其与瞬态条件下的大样本观测结果联系起来。本研究使用紫外可见分光光度法和正电子发射断层扫描（PET）分析了胶体高岭石在沙包中的迁移。在单相流条件下，通过对悬浮放射性标记高岭石的水脉冲成像，完成了 PET 成像。通过 PET 成像实验方法，可以在亚厘米尺度上对胶体高岭石的迁移、附着和脱离特性的变化进行精确的四维量化。这项研究为量化地质多孔介质中的无机胶体迁移提供了一种新方法，为今后在瞬态流动和流体化学条件下研究更复杂的异质系统奠定了基础。

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来源期刊

Transport in Porous Media 工程技术-工程：化工

CiteScore

5.30

自引率

7.40%

发文量

155

审稿时长

4.2 months

期刊介绍： -Publishes original research on physical, chemical, and biological aspects of transport in porous media- Papers on porous media research may originate in various areas of physics, chemistry, biology, natural or materials science, and engineering (chemical, civil, agricultural, petroleum, environmental, electrical, and mechanical engineering)- Emphasizes theory, (numerical) modelling, laboratory work, and non-routine applications- Publishes work of a fundamental nature, of interest to a wide readership, that provides novel insight into porous media processes- Expanded in 2007 from 12 to 15 issues per year. Transport in Porous Media publishes original research on physical and chemical aspects of transport phenomena in rigid and deformable porous media. These phenomena, occurring in single and multiphase flow in porous domains, can be governed by extensive quantities such as mass of a fluid phase, mass of component of a phase, momentum, or energy. Moreover, porous medium deformations can be induced by the transport phenomena, by chemical and electro-chemical activities such as swelling, or by external loading through forces and displacements. These porous media phenomena may be studied by researchers from various areas of physics, chemistry, biology, natural or materials science, and engineering (chemical, civil, agricultural, petroleum, environmental, electrical, and mechanical engineering).