Category: Transient Plane Source
Keywords: gas rich environments, hydrate saturation level, hydrate-bearing sand, methane, methane hydrates, morphology, sedimentary, Temperature, Thermal Conductivity, Transient plane source (TPS) method, Transient plane source (TPS) technique, transient properties testing, water saturation, wave speed studies
Abstract: Hydrate bearing sediments, found in permafrost, have great potential as a future energy source. Therefore, the thermal properties need to be determined to design drilling and gas extraction processes. The thermal conductivity was measured through the Hot Disk transient plane source (TPS) method. The thermal conductivity values show weak negative dependence on temperature. The effective thermal conductivity of hydrate-bearing sediment is strongly dependent on the water-saturation of the sand, the hydrates tend to cement sediment grains together, and even a small amount of hydrates present can significantly increase the effective thermal conductivity of the sediments. In sand samples with high water concentrations and water-saturated sand, the effective thermal conductivity does not show an obvious increase with the hydrate saturation level.
Reference: International Journal of Heat and Mass Transfer, 92 (2015) 8-14