Optical and dielectric properties of water-bearing sandstones in the terahertz range

IF 3.1 3区物理与天体物理 Q2 INSTRUMENTS & INSTRUMENTATION

Infrared Physics & Technology Pub Date : 2024-10-23 DOI:10.1016/j.infrared.2024.105610

ChuTong Gao , ZhiYuan Zheng , Lixian Hao , Tong Zhang , MingRui Zhang , Qiming Qiu , Shanshan Li , Xiaodi Zheng , HaoChong Huang , Kunfeng Qiu

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引用次数: 0

Abstract

Water content significantly impacts the physical properties of sandstone. Studying the properties of water-bearing sandstone helps understand its behavior in seismic wave propagation, groundwater flow, and hydrocarbon reservoirs. This paper investigates the optical and dielectric properties of water-bearing quartz sandstone and arkose using terahertz time-domain spectroscopy (THz-TDS). The intrinsic dielectric permittivities were extracted using effective medium theory and fitted with the Debye model. Results show that increasing water content extends the slow relaxation time from 2.746 ps to 3.791 ps and the fast relaxation time from 0.032 ps to 0.282 ps. Compared to quartz sandstone, arkose shows a slower increase in dielectric permittivity due to restricted water molecule movement caused by its higher ion content, with the analysis focusing on the frequency dependence of the polarizability of the internal components.

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太赫兹范围内含水砂岩的光学和介电特性

含水量对砂岩的物理性质有重大影响。研究含水砂岩的特性有助于了解其在地震波传播、地下水流和油气藏中的行为。本文利用太赫兹时域光谱（THz-TDS）研究了含水石英砂岩和芒硝的光学和介电性质。利用有效介质理论提取了固有介电常数，并用德拜模型进行了拟合。结果表明，水含量的增加会将慢弛豫时间从 2.746 ps 延长到 3.791 ps，将快弛豫时间从 0.032 ps 延长到 0.282 ps。与石英砂岩相比，芒硝的介电常数增加较慢，原因是其离子含量较高导致水分子运动受限，分析的重点是内部成分极化率的频率依赖性。

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来源期刊

Infrared Physics & Technology 物理-光学

CiteScore

5.70

自引率

12.10%

发文量

400

审稿时长

67 days

期刊介绍： The Journal covers the entire field of infrared physics and technology: theory, experiment, application, devices and instrumentation. Infrared'' is defined as covering the near, mid and far infrared (terahertz) regions from 0.75um (750nm) to 1mm (300GHz.) Submissions in the 300GHz to 100GHz region may be accepted at the editors discretion if their content is relevant to shorter wavelengths. Submissions must be primarily concerned with and directly relevant to this spectral region. Its core topics can be summarized as the generation, propagation and detection, of infrared radiation; the associated optics, materials and devices; and its use in all fields of science, industry, engineering and medicine. Infrared techniques occur in many different fields, notably spectroscopy and interferometry; material characterization and processing; atmospheric physics, astronomy and space research. Scientific aspects include lasers, quantum optics, quantum electronics, image processing and semiconductor physics. Some important applications are medical diagnostics and treatment, industrial inspection and environmental monitoring.