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 a 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