Geomechanical properties of gas hydrate-bearing sediments in Shenhu Area of the South China Sea
文献类型：期刊论文
| 作者 | Wei, Jiangong2,3,4; Yang, Lin3,4; Liang, Qianyong3,4; Liang, Jinqiang3,4; Lu, Jingan3,4; Zhang, Wei3,4; Zhang, Xuhui1; Lu, Xiaobing1; Lu XB(鲁晓兵) ; Zhang XH(张旭辉)
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| 刊名 | ENERGY REPORTS
 |
| 出版日期 | 2021-11-01 |
| 卷号 | 7页码:8013-8020 |
| 关键词 | Natural gas hydrate Pressure core Effective stress Shear strength Permeability anisotropy |
| ISSN号 | 2352-4847 |
| DOI | 10.1016/j.egyr.2021.05.063 |
| 通讯作者 | Yang, Lin(yl_gmgs@163.com) ; Zhang, Xuhui(zhangxuhui@imech.ac.cn) |
| 英文摘要 | It is essential to understand the in-situ geomechanical properties of natural gas hydrate-bearing reservoirs for hydrate drilling, the design of reservoir stimulation and production schemes, geologic disaster prevention, and environmental impact assessment. In this way, it serves as the basis for the development and utilization of gas hydrate resources. In 2016, the Guangzhou Marine Geological Survey conducted the fourth natural gas hydrate drilling (Expedition GMGS4) in the north of the South China Sea, during which the effective stress of gas hydrate-bearing reservoirs in the study area was ascertained and gas hydrate-bearing pressure cores were collected. The effective stress was determined to be 700-800 kPa by in-situ piezocone penetration tests. The saturation, permeability, and shear strength of gas hydrates in the pressure core samples were measured under the in-situ stress state using the shipboard multi-sensor core logger (MSCL), pressure core analysis and transfer system (PCATS), and PCATS Triaxial system. Based on this, the distribution characteristics and the relationship of the permeability and gas hydrate saturation of the gas hydrate-bearing reservoirs were explored. Furthermore, the effects of effective stress and gas hydrate saturation on shear strength of gas hydrate-bearing clayey-silt sediments were mainly analyzed, as well as the stress-strain characteristics of gas hydrate-bearing sediments. The results are as follows: (i) the gas hydrate saturation and reservoir permeability in the study area are 0.7%-55% and 10(-3 )10(-1) mD, respectively, indicating low-permeability reservoirs; (ii) the gas hydrate saturation and reservoir permeability have obvious anisotropy in horizontal and vertical directions; (iii) the undrained shear strength of gas hydrate-bearing sediments is 0.24-0.52 MPa, and the shear strength of fine-grained sediments is more sensitive to the changes of in-situ stress. In the case that deviatoric stress continues increasing, microfractures may occur inside gas hydrate-bearing sediments, and this can lead to drastic changes in the strength of gas hydrate-bearing reservoirs. Therefore, it is necessary to take into account the effects of micro-fractures in gas hydrate-bearing reservoirs on engineering safety during long-term hydrate production. (C) 2021 The Authors. Published by Elsevier Ltd. |
| WOS关键词 | MECHANICAL-PROPERTIES ; ENERGY |
| 资助项目 | National Key Research and Development Program of China[2018YFC0310000] ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), China[GML2019ZD0201] ; Major Program of National Natural Sci-ence Foundation of China[51991365] ; gas hydrate program by the China Geological Survey[DD20190218] ; Major Program of Guangdong Basic and Applied Research, China[2019B030302004] |
| WOS研究方向 | Energy & Fuels |
| 语种 | 英语 |
| WOS记录号 | WOS:000727735500014 |
| 资助机构 | National Key Research and Development Program of China ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), China ; Major Program of National Natural Sci-ence Foundation of China ; gas hydrate program by the China Geological Survey ; Major Program of Guangdong Basic and Applied Research, China |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/88064]  |
| 专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
| 通讯作者 | Yang, Lin; Zhang, Xuhui |
| 作者单位 | 1.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China 2.Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou 511458, Peoples R China 3.China Geol Survey, Gas Hydrate Engn Technol Ctr, Guangzhou 510075, Peoples R China 4.China Geol Survey, Guangzhou Marine Geol Survey, Guangzhou 510075, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wei, Jiangong,Yang, Lin,Liang, Qianyong,et al. Geomechanical properties of gas hydrate-bearing sediments in Shenhu Area of the South China Sea[J]. ENERGY REPORTS,2021,7:8013-8020. |
| APA | Wei, Jiangong.,Yang, Lin.,Liang, Qianyong.,Liang, Jinqiang.,Lu, Jingan.,...&张旭辉.(2021).Geomechanical properties of gas hydrate-bearing sediments in Shenhu Area of the South China Sea.ENERGY REPORTS,7,8013-8020. |
| MLA | Wei, Jiangong,et al."Geomechanical properties of gas hydrate-bearing sediments in Shenhu Area of the South China Sea".ENERGY REPORTS 7(2021):8013-8020. |
入库方式： OAI收割
来源：力学研究所
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