Laboratory study of the acoustic properties of sand samples containing ice

5th All-Russian Conference with International Participation POLAR MECHANICS

地球科学;力学

Dugarov, G.A.^1 ; Duchkov, A.A.^1 ; Fokin, M.I.^1

Trofimuk Institute of Petroleum Geology and Geophysics, Novosibirsk, Russia^1

关键词: Acoustic measurements;    Ice particles;    Laboratory set-up;    Laboratory studies;    Mechanical stress;    Methane hydrates;    Negative temperatures;    Temperature drops;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/193/1/012020/pdf
DOI  :  10.1088/1755-1315/193/1/012020

学科分类：力学，机械学

来源: IOP

【 摘 要 】

The paper considers a series of experiments with sand samples containing ice. The acoustic measurements were performed in specialized laboratory setup which allows also to form synthetic hydrate-bearing samples in order to find differences between ice and methane hydrate. We find that the velocities of compressional and shear waves depend on the rate of temperature drop below 0°C. During the long-time maintaining of the constant negative temperature the decreasing of the velocities was observed. These dependences can possibly be explained by that in a case of quick freezing formed ice is not energetically favourable, after formation ice particles reconstruct into the pore space with less mechanical stress.