Hydrate formation and dissociation characteristics in clayey silt sediment
文献类型：期刊论文
| 作者 | Ma, Xiaolong; Jiang, Dandan; Lu, Jiang; Fang, Xiaoyu; Yang, Pu; Xia, Dongqing |
| 刊名 | JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
 |
| 出版日期 | 2022-04-01 |
| 卷号 | 100 |
| 关键词 | Hydrate formation Hydrate dissociation Water content Clay type Bound water |
| ISSN号 | 1875-5100 |
| 英文摘要 | The geological occurrence of natural gas hydrates in clayey silt sediments has been extensively confirmed. Compared with sandy sediments, clayey silt is characterized by a large specific surface area, high capillary pressure, and high bound water content, which leads to distinct characteristics of hydrate formation and dissociation. The formation and dissociation of methane hydrates in clayey silt sediments with illite or montmorillonite were experimentally investigated. It was determined that an increase in the water content of silt and illite-silt sediments from similar to 9.47% to similar to 28.41% caused a decrease in the water-to-hydrate conversion ratio owing to the formation of a hydrate film between water and CH4 gas. However, in montmorillonite-silt sediments, the water-to-hydrate conversion rate increased between 9.47% and 18.94% of water saturation and decreased between 18.94% and 28.41% of water saturation under the combined effects of weakly bound water content and capillary pressure. In the hydrate dissociation experiment, the temperature of sediments with similar to 9.47% water content decreased more, which was caused by the smaller specific heat capacity of sediments with lower water content. Meanwhile, the temperature drops below the freezing point during the hydrate dissociation process, which is caused by the strong inhibition of hydrate phase equilibrium by montmorillonite. This study demonstrates the effects of clay type and water content on hydrate formation and dissociation, which is helpful for understanding the production behavior of clayey silt hydrate reservoirs. |
| 学科主题 | Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000784019800002 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/34972]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Southern Marine Science & Engineering Guangdong Laboratory; Southern Marine Science & Engineering Guangdong Laboratory (Zhanjiang) 2.Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS; |
| 推荐引用方式 GB/T 7714 | Ma, Xiaolong,Jiang, Dandan,Lu, Jiang,et al. Hydrate formation and dissociation characteristics in clayey silt sediment[J]. JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,2022,100. |
| APA | Ma, Xiaolong,Jiang, Dandan,Lu, Jiang,Fang, Xiaoyu,Yang, Pu,&Xia, Dongqing.(2022).Hydrate formation and dissociation characteristics in clayey silt sediment.JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,100. |
| MLA | Ma, Xiaolong,et al."Hydrate formation and dissociation characteristics in clayey silt sediment".JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING 100(2022). |
入库方式： OAI收割
来源：武汉岩土力学研究所
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