| Numerical study on the deformation of soil stratum and vertical wells with gas hydrate dissociation |
| Chen XD; Zhang XH(张旭辉) ; Lu XB(鲁晓兵); Wei W; Shi, YH; Zhang, XH (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China.
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| 发表期刊 | ACTA MECHANICA SINICA
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| 2016
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| 卷号 | 32期号:5页码:905-914 |
| ISSN | 0567-7718
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| 摘要 | Gas hydrate (GH) dissociates owing to thermal injection or pressure reduction from the well in gas/oil or GH exploitation. GH dissociation leads to, for example, decreases in soil strength, engineering failures such as wellbore instabilities, and marine landslides. The FLAC3D software was used to analyze the deformation of the soil stratum and vertical wells with GH dissociation. The effects of Young's modulus, internal friction angle, cohesion of the GH layer after dissociation, and the thickness of the GH layer on the deformation of soils were studied. It is shown that the maximum displacement in the whole soil stratum occurs at the interface between the GH layer and the overlayer. The deformation of the soil stratum and wells increases with decreases in the modulus, internal friction angle, and cohesion after GH dissociation. The increase in thickness of the GH layer enlarges the deformation of the soil stratum and wells with GH dissociation. The hydrostatic pressure increases the settlement of the soil stratum, while constraining horizontal displacement. The interaction between two wells becomes significant when the affected zone around each well exceeds half the length of the GH dissociation zone. |
| 关键词 | Gas Hydrate
Dissociation
Flac3d
Soil Stratum
Well
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| DOI | 10.1007/s10409-016-0589-8
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| URL | 查看原文
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| 收录类别 | SCI
; EI
; CSCD
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| 语种 | 英语
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| WOS记录号 | WOS:000386498900011
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| 关键词[WOS] | Gas hydrate
; Dissociation
; FLAC3D
; Soil stratum
; Well
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| WOS研究方向 | Engineering
; Mechanics
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| WOS类目 | Engineering, Mechanical
; Mechanics
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| 项目资助者 | This project was supported by the National Natural Science Foundation of China (Grants 11272314, 51239010, 41376078), a joint project of the Chinese National Petroleum Corporation and the Chinese Academy of Sciences (Grant 2015A-4813), and a project of the China Geological Survey (Grant GZH201100311).
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| 课题组名称 | LMFS海洋土力学(LHO)
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| 论文分区 | 二类
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| 力学所作者排名 | True
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/59693
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| 专题 | 流固耦合系统力学重点实验室
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| 通讯作者 | Zhang, XH (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China. |
推荐引用方式
GB/T 7714 |
Chen XD,Zhang XH,Lu XB,et al. Numerical study on the deformation of soil stratum and vertical wells with gas hydrate dissociation[J]. ACTA MECHANICA SINICA,2016,32,5,:905-914.
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| APA |
Chen XD,张旭辉,鲁晓兵,Wei W,Shi, YH,&Zhang, XH .(2016).Numerical study on the deformation of soil stratum and vertical wells with gas hydrate dissociation.ACTA MECHANICA SINICA,32(5),905-914.
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| MLA |
Chen XD,et al."Numerical study on the deformation of soil stratum and vertical wells with gas hydrate dissociation".ACTA MECHANICA SINICA 32.5(2016):905-914.
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