對沙中所含天然氣水合物熱導(dǎo)率的測量及模型的建立
2022年10月20日 17:05:04
來源：凱戈納斯儀器商貿(mào)（上海）有限公司 >> 進(jìn)入該公司展臺
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對沙中所含天然氣水合物熱導(dǎo)率的測量及模型的建立
Effective thermal conductivity (ETC) of both tetrahydrofuran (THF) and methane hydrate-bearing sandy porous media was measured by the Hot Disk Thermal Constant Analyser. Thermal conductivity of methane hydrate is 0.575 W m?1 K?1 at 0°C and 6.6 MPa (methane gas pressure), which is close to THF hydrate''s 0.51 W m?1 K?1 at 0°C and 0.1 MPa (atmosphere pressure). However, the measured 1 W m?1 K?1 ETC of methane hydrate-bearing sand is significantly lower than that of THF hydrate-bearing sand at ～2 W m?1 K?1. This is because the methane hydrate formed with a sodium dodecyl sulfate (SDS) solution in sand at our laboratory has a “wall creeping” growth characteristic and consequently a large part of the pores were filled with methane free gas. ETCs of sand containing gas hydrates were also calculated using a renormalization method. The process involves sample partitioning, labeling, initial value assignments, and renormalization calculations. A Monte Carlo analysis was applied to sample laboratory-scale gas hydrate-bearing sand assemblies. We found that the renormalization modeling results agreed well with measured
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