| 祁连山冻土区天然气水合物储层岩石热物性实验研究 |
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| 引用本文： | 万丽华,梁徳青,李栋梁,关进安.祁连山冻土区天然气水合物储层岩石热物性实验研究[J].现代地质,2018,32(2):385. |
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| 作者姓名： | 万丽华 梁徳青 李栋梁 关进安 |
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| 作者单位： | (中国科学院广州能源研究所，广东 广州510640) |
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| 基金项目： | 国家自然科学基金（51576197,51106163,41374149）；中国科学院知识创新工程(KGZD-EW-301)。 |
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| 摘 要： | 采用扫描电镜测试了祁连山冻土区天然气水合物储层泥岩和砂岩微观结构。在显微镜下观察到，泥岩由微小均匀的片状多边形块体构成，这种微观结构使得泥岩中水合物以浸染状赋存；而砂岩内部存在分散状孔隙，砂岩中水合物为孔隙赋存。采用瞬变平面热源法测试了含甲烷水合物储层岩石的导热系数和热扩散率。在温度为-941~941 ℃时，干泥岩导热系数为0577~0853 W·m-1·K-1，含甲烷水合物储层泥岩导热系数为0704~1050 W·m-1·K-1。在温度为-811~928 ℃时，干砂岩导热系数为0828~1271 W·m-1·K-1，含甲烷水合物储层砂岩导热系数为3850~4555 W·m-1·K-1。在温度为-941~941 ℃时，干泥岩热扩散率为0712~0894 mm2·s-1，含甲烷水合物储层泥岩热扩散率为0792~1006 mm2·s-1，干砂岩热扩散率为1198~1674 mm2·s-1，含甲烷水合物储层砂岩热扩散率为1403~1769 mm2·s-1。测试数据表明，对于孔隙型水合物，测定导热系数是一种较好的辨识水合物存在的辅助手段。
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| 关 键 词： | 天然气水合物 导热系数 热扩散 微观结构 泥岩 砂岩 |
Experimental Study of Thermophysical Properties of Reservoirs Bearing Gas Hydrates in Qilian Mountain Permafrost |
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| WAN Lihua,LIANG Deqing,LI Dongliang,GUAN Jin'an.Experimental Study of Thermophysical Properties of Reservoirs Bearing Gas Hydrates in Qilian Mountain Permafrost[J].Geoscience——Journal of Graduate School,China University of Geosciences,2018,32(2):385. |
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| Authors: | WAN Lihua LIANG Deqing LI Dongliang GUAN Jin'an |
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| Institution: | (Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou,Guangdong510640,China) |
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| Abstract: | In this paper, the reservoir microstructures of mudstone and sandstone from Qilian Mountain permafrost were tested by electron microscopy. Under the microscope, the mudstone is composed of tiny and uniform flaky polygonal blocks, so that the hydrate immerses in the mudstone. The sandstone has dispersed pores inside, thus the hydrate exists in the sandstone by pore type filling. The thermal conductivity and thermal diffusi vity of reservoirs bearing methane hydrate were measured by transient plane heat source method. At the temperature range of about -941 to 941 ℃, the thermal conductivities of the dried mudstone and the mudstone bearing methane hydrate are 0577-0853 W·m-1·K-1 and 0704-1050 W·m-1·K-1, respectively. At the temperature range of about -811 to 928 ℃, the dried sandstone and the sandstone bearing methane hydrate have thermal conductivity of 0828-1271 W·m-1·K-1 and 3850-4555 W·m-1·K-1, respectively. At the temperature range of about -941 to 941 ℃, the thermal diffusivities of the dried mudstone, the mudstone bearing methane hydrate, the dried sandstone, and the sandstone bearing methane hydrate are 0712-0894 mm2·s-1, 0792-1006 mm2·s-1,1198-1674 mm2·s-1, and 1403-1769 mm2·s-1 ,respectively. The data show that it is a good means to explore the existence of hydrate by measuring the thermal conductivity of intervals bearing gas hydrate. |
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| Keywords: | gas hydrate thermal conductivity thermal diffusivity microstructure mudstone sandstone |
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