Studies on micromorphology and permeability of hydrate-bearing porous media
文献类型：期刊论文
| 作者 | Li, Gang1; Weng, Yi-Fan1,2; Li, Xiao-Sen1; Xu, Ze-Lin1,2; Lv, Qiu-Nan1; Xu, Chun -Gang1 |
| 刊名 | FUEL
 |
| 出版日期 | 2023-02-15 |
| 卷号 | 334页码:13 |
| 关键词 | Micromorphology Methane hydrates Ices Porous media Dissociation characteristics Weighted permeability reduction model |
| ISSN号 | 0016-2361 |
| DOI | 10.1016/j.fuel.2022.126647 |
| 通讯作者 | Li, Xiao-Sen(lixs@ms.giec.ac.cn) ; Xu, Ze-Lin(xuzl@ms.giec.ac.cn) |
| 英文摘要 | The micromorphology of methane hydrates determines the permeability of hydrate-bearing sediments. In this study, the morphological characteristics of ice and methane hydrates before and after dissociation were measured using a Scanning Electron Microscope (SEM). Then, the relationship between micromorphology and permeability was developed using a mathematical model. The results showed that ice and methane hydrates differ in their shapes, lengths, and during sublimation, ice and methane hydrates could be accurately separated in the SEM images. The ice had hexagonal, cubic, and spherical shapes, with lengths of 1.0-10.0 & mu;m, and its surfaces were irregularly shrunk during sublimation. Methane hydrates had cores and block shapes, with lengths of 5.0-150.0 & mu;m, and were divided into grain-coating and pore-filling methane hydrates in a saturation of 15 %. The former was formed with cores, whereas the latter was formed with cores and blocks. During hydrate dissociation in glass beads, homogenous micropores with an average diameter of 0.20 & mu;m were formed on their surfaces, which served as gas release channels. Micropores were special characteristics of methane hydrates during dissociation. Thus, surface porosity was used to determine the quantity of micropores. The surface porosity was 15 % at the hydrate saturation of 15 %. A weighted permeability reduction model was developed considering both grain-coating and pore-filling methane hydrates in the sediments, the curves of which was provided by determining the weight coefficients and permeability reduction exponents in the model. By comparing experimental permeability data with the curves, the weight coefficients, permeability reduction exponents, and growth habits of methane hydrate in the sediments could be obtained. |
| WOS关键词 | NATURAL-GAS HYDRATE ; METHANE HYDRATE ; DISSOCIATION ; BEHAVIORS |
| 资助项目 | National Natural Science Foundation of China[51976228] ; Key Program of National Natural Science Foundation of China[51736009] ; Special Project for Marine Economy Development of Guangdong Province[GDME-2020D044] |
| WOS研究方向 | Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001013532500001 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | National Natural Science Foundation of China ; Key Program of National Natural Science Foundation of China ; Special Project for Marine Economy Development of Guangdong Province |
| 源URL | [http://ir.giec.ac.cn/handle/344007/39519]  |
| 专题 | 中国科学院广州能源研究所 |
| 通讯作者 | Li, Xiao-Sen; Xu, Ze-Lin |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Gang,Weng, Yi-Fan,Li, Xiao-Sen,et al. Studies on micromorphology and permeability of hydrate-bearing porous media[J]. FUEL,2023,334:13. |
| APA | Li, Gang,Weng, Yi-Fan,Li, Xiao-Sen,Xu, Ze-Lin,Lv, Qiu-Nan,&Xu, Chun -Gang.(2023).Studies on micromorphology and permeability of hydrate-bearing porous media.FUEL,334,13. |
| MLA | Li, Gang,et al."Studies on micromorphology and permeability of hydrate-bearing porous media".FUEL 334(2023):13. |
入库方式： OAI收割
来源：广州能源研究所
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