| 沉积物孔隙毛细管压力与甲烷水合物饱和度关系研究 |
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| 引用本文： | 孙始财,刘昌岭,业渝光,刘玉峰.沉积物孔隙毛细管压力与甲烷水合物饱和度关系研究[J].海洋学报(英文版),2014,33(10):30-36. |
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| 作者姓名： | 孙始财 刘昌岭 业渝光 刘玉峰 |
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| 作者单位： | 山东科技大学 山东省土木工程防灾减灾重点实验室, 青岛 266590, 中国;油气藏地质及开发工程国家重点实验室（西南石油大学）, 成都 610500, 中国;青岛海洋地质研究所, 青岛266071, 中国;青岛海洋地质研究所, 青岛266071, 中国;山东科技大学 山东省土木工程防灾减灾重点实验室, 青岛 266590, 中国 |
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| 基金项目： | The Open Fund of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University under contract No. PLN1206; the National Natural Science Foundation of China under contract No. 51376114; the Ministry of Land and Resources research of China in the Public Interest under contract No. 201111026; the Open Fund of Shandong Provincial Key Laboratory of Depositional Mineralization & Sedimentary Minerals, Shandong University of Science & Technology under contract No. DMSM201007; the National Basic Research Program (973 program) of China under contract No. 2009CB219503. |
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| 摘 要： | To better understand the relationship between the pore capillary pressure and hydrate saturation in sediments, a new method was proposed. First, the phase equilibria of methane hydrate in fine-grained silica sands were measured. As to the equilibrium data, the pore capillary pressure and saturation of methane hydrate were calculated. The results showed that the phase equilibria of methane hydrates in fine-grained silica sands changed due to the depressed activity of pore water caused by the surface group and negatively charged characteristic of silica particles as well as the capillary pressure in small pores together. The capillary pressure increased with the increase of methane hydrate saturation due to the decrease of the available pore space. However, the capillary-saturation relationship could not yet be described quantitatively because of the stochastic habit of hydrate growth.
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| 关 键 词： | 甲烷水合物 毛细管压力 饱和度 沉积层 二氧化硅粒子 孔隙水 毛细压力 平衡数据 |
| 收稿时间： | 2013/5/24 0:00:00 |
| 修稿时间： | 2013/12/26 0:00:00 |
Pore capillary pressure and saturation of methane hydrate bearing sediments |
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| Sun Shicai,Liu Changling,Ye Yuguang and Liu Yufeng.Pore capillary pressure and saturation of methane hydrate bearing sediments[J].Acta Oceanologica Sinica,2014,33(10):30-36. |
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| Authors: | Sun Shicai Liu Changling Ye Yuguang and Liu Yufeng |
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| Affiliation: | 1. Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao 266510, China
2. Qingdao Institute of Marine Geology, Qingdao 266071, China |
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| Abstract: | To better understand the relationship between the pore capillary pressure and hydrate saturation in sediments, a new method was proposed. First, the phase equilibria of methane hydrate in fine-grained silica sands were measured. As to the equilibrium data, the pore capillary pressure and saturation of methane hydrate were calculated. The results showed that the phase equilibria of methane hydrates in fine-grained silica sands changed due to the depressed activity of pore water caused by the surface group and negatively charged characteristic of silica particles as well as the capillary pressure in small pores together. The capillary pressure increased with the increase of methane hydrate saturation due to the decrease of the available pore space. However, the capillary-saturation relationship could not yet be described quantitatively because of the stochastic habit of hydrate growth. |
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| Keywords: | methane hydrate equibrium silica sand saturation pore capillary pressure |
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