Preparation of laboratory hydrate physical model and research on the electromagnetic properties based on the ground penetrating radar
DU Bing-Rui1,2, BAI Da-Wei1,2, FANG Hui1,2, ZHANG Peng-Hui1,2, LYU Qin-Yin1,2
1. Institute of Geophysical and Geochemical Exploration, CAGS, Langfang 065000, China;
2. Laboratory of Geophysical EM Probing Technologies, MLR, Langfang 065000, China
Ground penetrating radar is an effective technology for detecting hydrates. Simulation test and study of the relationship between electromagnetic characteristics and gas hydrate saturation as well as other factors show that ground penetrating radar has great significance for permafrost hydrate exploration and reserve estimation in terrestrial area. Through production of samples by the laboratory the authors obtained a uniform natural quartz sand particle as a skeleton containing tetrahydrofuran hydrate and studied its dielectric constant. After the 1.5G high-frequency radar testing, it was found that the electromagnetic characteristics have obvious difference between the pure hydrate model and the THF hydrate model. When the saturation of the model of tetrahydrofuran hydrate is higher than 35%, the volume of hydrate increases, the dielectric constant of hydrate model increases too, and the radar speed decreases in the model. The THF hydrate does keep stability in nearly one hour at 10℃ room temperature and atmospheric pressure; when the hydrate and liquid tetrahydrofuran coexist in the pore of the model, the more the volume fraction of THF and the more liquid THF in the pore, the greater the dielectric constant of hydrate model is.
杜炳锐, 白大为, 方慧, 张鹏辉, 吕琴音. 基于探地雷达的实验室水合物物理模型制备与电磁特性研究[J]. 物探与化探, 2017, 41(1): 116-122.
DU Bing-Rui, BAI Da-Wei, FANG Hui, ZHANG Peng-Hui, LYU Qin-Yin. Preparation of laboratory hydrate physical model and research on the electromagnetic properties based on the ground penetrating radar. Geophysical and Geochemical Exploration, 2017, 41(1): 116-122.
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