Laboratory measurement of longitudinal wave velocity of artificial gas hydrate under different temperatures and pressures

• DOI: 10.1007/s11433-008-0166-7
• Publication Date: 2008-09-18T16:14:11Z
• Authors: Dong Wang; DongLiang Li; HaiLan Zhang; ShuanShi Fan; HaiBo Zhao
• Keywords: Clathrate hydrate

The longitudinal wave velocity and attenuation measurements of artificial gas hydrate samples at a low temperature are reported. And the pressure dependence is also investigated. In order to understand acoustic properties hydrate, pure ice, tetrahydrofuran (THF), sand sediment containing measured between 0°C −15°C. For THF samples, whose density 898 kg/m3, 895 kg/m3 475 respectively 3574 m/s, 3428 m/s 2439 m/s. synthesized compacted lower than that samples. velocities increase when densities increase, while decreases. Under condition temperature, results show slightly affected by temperature. with piston pressures. example, one sample increases from 3049 up 3337 other 2315 2995 But decreases 3800 3546 −15°C 5°C changes significantly close melting point. Formation conditions two same but different conversion ratios water. experiment important for exploration resources development techniques.