2-2-1 過冷却状態下における砂-水-ガス-メタンハイドレートの4成分系模擬コア試料の熱物性測定(Session 2-2 ハイドレート分析)

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  • 2-2-1 THERMOPHYSICAL PROPETIES MEASUREMENT OF SEDIMENT CONTAINING METHANE-WATER-HYDRATE MIXTURE

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Thermal property of 4-component artificial hydrate sediment sample consisted with sediment-water-methane-water was measured by means of transient plane source technique. To avoid difficulties with heat of melting of hydrate due to output of power from transient plane source, measurement was conducted under super-cooling state during methane hydrate formation in sediment pores. The results showed that both thermal diffusivity and conductivity slightly increased with saturation of hydrate, S_h, increased within the range of 0 < S_h < 0.3. Calculations of thermal conductivity with some mixing models were also carried out to examine the applicability of those models to estimate the thermal conductivity of artificial hydrate sediment sample. The distribution model shows a relatively good agreement with the experimental data; however, it underestimates the thermal conductivity of the four-component sample.

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