Acoustic Determination of Methane Hydrate Disssociation Pressures

摘要: The unique nature of the molecular structures gas hydrates results in curious acoustic properties which have yet to be adequately characterized. Understanding behavior liquids, bubbly and sediments containing liquids and/or is vital for surveying their location using seismic or echosounding techniques may become a key tool monitoring hydrate dissociation its possible link climate change. Acoustic gassy substances are known strong dependence on excitation frequency; however, tabulated values sound speeds most often measured at high frequencies (>200 kHz) despite modern methods use below 100 kHz. This presentation details laboratory experiment pressures natural structure I II methane samples were determined by measuring low-frequency velocity liquid as function hydrostatic pressure. [Work supported United States Oce Naval Research.]