Analysis of the effect of hydrate on water retention curves in gas hydrate-bearing sediments using gas drainage combined with NMR
文献类型：期刊论文
| 作者 | Zhang, Zhun1,2,3; Ning, Fulong2,4; Lu, Wanjun1,4; Zhou, Jiazuo5; Liu, Lele3,4; Ji, Yunkai3,4; Wei, Changfu5; Liu, Changling3,4 |
| 刊名 | JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
 |
| 出版日期 | 2022-12-01 |
| 卷号 | 108期号:-页码:- |
| ISSN号 | 1875-5100 |
| 关键词 | Gas hydrate -bearing sediments Water retention curves Low -field NMR Pore sizes Hydrate saturation Vedachalam et al 2015) |
| 英文摘要 | Water retention curves play a critical role in numerical simulations for predicting fluid production and sediment deformation behaviors in gas hydrate-bearing sediments (GHBSs). This study uses a new testing assembly that combines gas drainage and low-field nuclear magnetic resonance (NMR) tests to determine the water retention curves of artificially synthesized clay silty specimens. The effect of hydrate on the pore size distributions and water retention curves is analyzed via NMR transverse relaxation time curve distributions, and the mechanism of changes in the water retention curve parameters is further discussed. The results show that hydrate formation decreases the proportion of pores with sizes greater than 15 mu m and increases the proportion of pores with sizes less than 3.5 mu m in clay silty sediments. Hydrate formation increases capillary pressure and prevents available water migration. The presence of hydrate exponentially increases the normalized capillary pressure but exponentially decreases the normalized curve shape factor, yielding narrower curve distributions. The gas entry pressure and curve shape factor exhibit linear correlations with the pore size distribution parameters. The results imply that the changes in the water retention curves are strongly related to the initial pore size distributions. This study offers a deep understanding of capillary effects-related water retention characteristics and their underlying links with the pore size distributions, and demonstrates that low-field NMR has great potential for characterizing water retention curves of GHBSs. |
| 学科主题 | Energy & Fuels ; Engineering |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCI LTD |
| WOS记录号 | WOS:000891734700003 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35489]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.College of Marine Science and Technology, China University of Geosciences, Wuhan, 430074, China 2.Faculty of Engineering, China University of Geosciences, Wuhan, 430074, China 3.Key Laboratory of Gas Hydrate, Ministry of Natural Resources, Qingdao Institute of Marine Geology, Qingdao, 266071, China 4.Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China 5.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430074, China |
| 推荐引用方式 GB/T 7714 | Zhang, Zhun,Ning, Fulong,Lu, Wanjun,et al. Analysis of the effect of hydrate on water retention curves in gas hydrate-bearing sediments using gas drainage combined with NMR[J]. JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,2022,108(-):-. |
| APA | Zhang, Zhun.,Ning, Fulong.,Lu, Wanjun.,Zhou, Jiazuo.,Liu, Lele.,...&Liu, Changling.(2022).Analysis of the effect of hydrate on water retention curves in gas hydrate-bearing sediments using gas drainage combined with NMR.JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,108(-),-. |
| MLA | Zhang, Zhun,et al."Analysis of the effect of hydrate on water retention curves in gas hydrate-bearing sediments using gas drainage combined with NMR".JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING 108.-(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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